U.S. patent application number 16/964511 was filed with the patent office on 2021-01-14 for pulsation-free wet spraying machine.
The applicant listed for this patent is SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY. Invention is credited to Wenhui BIAN, Lianjun CHEN, Guoming LIU, Zhaoxia LIU, Guanguo MA, Wen NIE, Gang PAN, Gang WANG.
Application Number | 20210010372 16/964511 |
Document ID | / |
Family ID | 1000005136882 |
Filed Date | 2021-01-14 |
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United States Patent
Application |
20210010372 |
Kind Code |
A1 |
CHEN; Lianjun ; et
al. |
January 14, 2021 |
PULSATION-FREE WET SPRAYING MACHINE
Abstract
A pulsation-free wet spraying machine resolves the issue of
pulsing during pumping of a concrete spraying machine. The wet
spraying machine includes a frame, a pumping mechanism, a swing
mechanism and a hydraulic system, wherein the pumping mechanism
includes a hopper, a material chamber, a concrete feeding
mechanism, an auxiliary feeding mechanism and a distribution valve,
the hopper is disposed above the material chamber, the concrete
feeding mechanism and the auxiliary feeding mechanism each include
a hydraulic cylinder, a concrete piston and a concrete cylinder,
the concrete cylinder of the concrete feeding mechanism and an
auxiliary concrete cylinder of the auxiliary feeding mechanism are
both connected with the material chamber, a discharge port is
disposed on the material chamber, sealing between the distribution
valve and the discharge port is provided by a sealing ring, the
distribution valve is disposed inside the material chamber, a front
friction plate and a rear friction plate are further disposed
inside the material chamber, the swing mechanism includes a swing
hydraulic cylinder, a mandrel, a swing arm and a swing hydraulic
cylinder base, and the mandrel drives the distribution valve to
swing. In addition, The pulsation-free wet spraying machine stably
feeds a material, has a compact structure, and is
wear-resistant.
Inventors: |
CHEN; Lianjun; (Qingdao
City, CN) ; MA; Guanguo; (Qingdao City, CN) ;
LIU; Guoming; (Qingdao City, CN) ; PAN; Gang;
(Qingdao City, CN) ; LIU; Zhaoxia; (Qingdao City,
CN) ; WANG; Gang; (Qingdao City, CN) ; NIE;
Wen; (Qingdao City, CN) ; BIAN; Wenhui;
(Qingdao City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY |
Qingdao City |
|
CN |
|
|
Family ID: |
1000005136882 |
Appl. No.: |
16/964511 |
Filed: |
December 10, 2018 |
PCT Filed: |
December 10, 2018 |
PCT NO: |
PCT/CN2018/120096 |
371 Date: |
July 23, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04B 15/02 20130101;
F04B 7/0258 20130101; F04B 53/10 20130101; F04B 15/023 20130101;
E21D 11/105 20130101; F04B 7/04 20130101; F04B 7/0034 20130101 |
International
Class: |
E21D 11/10 20060101
E21D011/10; F04B 15/02 20060101 F04B015/02; F04B 7/04 20060101
F04B007/04; F04B 53/10 20060101 F04B053/10 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 24, 2018 |
CN |
201810815021.7 |
Claims
1. A pulsation-free wet spraying machine, comprising a frame, a
pumping mechanism, a swing mechanism and a hydraulic system,
wherein the pumping mechanism comprises a hopper, a material
chamber, a concrete feeding mechanism, an auxiliary feeding
mechanism, a distribution valve and a discharge port, the hopper is
disposed above the material chamber, two concrete cylinders of the
concrete feeding mechanism are in communication with the material
chamber, and an auxiliary concrete cylinder of the auxiliary
feeding mechanism is in communication with the distribution valve
in the material chamber; the distribution valve is disposed inside
the material chamber, a front end of the distribution valve is in
communication with the discharge port, and a rear end of the
distribution valve is in communication with the concrete cylinders
and the auxiliary concrete cylinder in a swinging process; the
swing mechanism comprises a swing hydraulic cylinder, a mandrel, a
swing arm and a swing hydraulic cylinder base, the swing hydraulic
cylinder base is mounted at an outer side of the material chamber,
the swing hydraulic cylinders are symmetrically arranged at both
sides of the swing hydraulic cylinder base, and the swing arm is
hinged with the swing hydraulic cylinders; the swing arm is mounted
through a spline in cooperation with the mandrel; the
motor/hydraulic system comprises a hydraulic oil tank and a motor,
and the pumping mechanism, the swing mechanism and the
motor/hydraulic system are all disposed on the frame; in a swinging
process of the distribution valve, the rear end of the distribution
valve is always in communication with the auxiliary concrete
cylinder, and the front end of the distribution valve is always in
communication with the discharge port; the concrete cylinder of the
concrete feeding mechanism sucks a material from the material
chamber, the concrete feeding mechanism pushes the material in the
concrete cylinder to the distribution valve through the concrete
piston, so that the material reaches the discharge port through the
distribution valve; when any of the concrete cylinders pumps the
material, the auxiliary concrete piston in the auxiliary concrete
cylinder retracts to enable the auxiliary concrete cylinder to suck
the material from the distribution valve; when the distribution
valve swings, the material in the auxiliary concrete cylinder is
pushed to the distribution valve; when the auxiliary concrete
piston in the auxiliary concrete cylinder pushes the material,
baffle plates at both wings of the distribution valve friction
plate block outlets of the concrete cylinders.
2. The pulsation-free wet spraying machine according to claim 1,
wherein the concrete feeding mechanism comprises main hydraulic
cylinder, a concrete piston and a concrete cylinder, and a piston
rod of the main hydraulic cylinder pushes the concrete piston to
move inside the concrete cylinder; the auxiliary feeding mechanism
comprises an auxiliary hydraulic cylinder, an auxiliary concrete
piston and an auxiliary concrete cylinder, and an auxiliary piston
rod of the auxiliary hydraulic cylinder pushes the auxiliary
concrete piston to move inside the auxiliary concrete cylinder.
3. The pulsation-free wet spraying machine according to claim 2,
wherein the hopper is mounted above the material chamber, the
concrete feeding mechanism and the auxiliary feeding mechanism are
arranged at a side surface of the material chamber, the main
hydraulic cylinder is mounted on a water rinsing bath, and the
auxiliary hydraulic cylinder is mounted above the main hydraulic
cylinders.
4. The pulsation-free wet spraying machine according to claim 1,
wherein a distribution valve, a rear friction plate, a distribution
valve friction plate, a rubber spring, a sealing ring and a front
friction plate are disposed inside the material chamber, the rear
friction plate and the distribution valve friction plate are
sequentially disposed between the concrete cylinder of the concrete
feeding mechanism and the distribution valve, the rubber spring is
disposed between the distribution valve friction plate and the
distribution valve, baffle plates are disposed at both wings of the
distribution valve friction plate, and the sealing ring is disposed
between the distribution valve and the front friction plate; the
distribution valve friction plate and the rear friction plate are
in close contact.
5. The pulsation-free wet spraying machine according to claim 1,
wherein an opening of the front end of the distribution valve is in
a shape same as a shape of the discharge port swept by swing of the
distribution valve, a shape of an upper part of an opening of the
rear end of the distribution valve is same as a shape of the
auxiliary concrete cylinder swept by the swing of the distribution
valve, and a shape of a lower part of the opening of the rear end
of the distribution valve is same as a shape of the concrete
cylinder swept by the swing of the distribution valve.
6. (canceled)
7. The pulsation-free wet spraying machine according to claim 1,
wherein the front friction plate is disposed between the
distribution valve and the discharge port, and the distribution
valve friction plate and the rear friction plate are disposed
between the distribution valve and the concrete cylinder of the
concrete feeding mechanism; one through-hole is disposed on the
front friction plate, and three through-holes are disposed on the
rear friction plate; the distribution valve friction plate and the
rear friction plate are in close contact.
8. (canceled)
9. (canceled)
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of
engineering equipment, and in particular to a pulsation-free wet
spraying machine.
BACKGROUND
[0002] Concrete wet spraying machines are widely applied to
locations such as coal mine roadways and road tunnels requiring
concrete spraying supporting. The common concrete wet spraying
machine is a plunger-type concrete wet spraying machine that works
as follows: pumping is realized by switching a distribution valve.
In a pumping process, a pulsation phenomenon may be caused due to
swing of the distribution valve, thereby increasing a pipe blocking
probability in the pumping process and leading to a rebound problem
in a concrete spraying process.
SUMMARY
[0003] To solve the pulsation problem and the sprayed concrete
rebound problem of the concrete wet spraying machine in a working
process, the present disclosure provides a pulsation-free wet
spraying machine. A specific technical solution is described
below.
[0004] The pulsation-free wet spraying machine includes a frame, a
pumping mechanism, a swing mechanism and a hydraulic system, where
the pumping mechanism includes a hopper, a material chamber, a
concrete feeding mechanism, an auxiliary feeding mechanism, a
distribution valve and a discharge port, the hopper is disposed
above the material chamber, two concrete cylinders of the concrete
feeding mechanism communicate with the material chamber, and an
auxiliary concrete cylinder of the auxiliary feeding mechanism
communicates with the distribution valve in the material chamber;
the distribution valve is disposed inside the material chamber, a
front end of the distribution valve communicates with the discharge
port, and a rear end of the distribution valve communicates with
the concrete cylinder and the auxiliary concrete cylinder in a
swinging process; the swing mechanism includes a swing hydraulic
cylinder, a mandrel, a swing arm and a swing hydraulic cylinder
base, the swing hydraulic cylinder base is mounted at an outer side
of the material chamber, the swing hydraulic cylinders are
symmetrically arranged at both sides of the swing hydraulic
cylinder base, and the swing arm is hinged with the swing hydraulic
cylinder; the swing arm is mounted through a spline in cooperation
with the mandrel; the hydraulic system includes a hydraulic oil
tank and a motor, and the pumping mechanism, the swing mechanism
and the hydraulic system are all disposed on the frame.
[0005] Preferably, the concrete feeding mechanism includes a main
hydraulic cylinder, a concrete piston and a concrete cylinder, and
a piston rod of the main hydraulic cylinder pushes the concrete
piston to move inside the concrete cylinder; the auxiliary feeding
mechanism includes an auxiliary hydraulic cylinder, an auxiliary
concrete piston and an auxiliary concrete cylinder, and an
auxiliary piston rod of the auxiliary hydraulic cylinder pushes the
auxiliary concrete piston to move inside the auxiliary concrete
cylinder.
[0006] Preferably, the hopper is mounted above the material
chamber, the concrete feeding mechanism and the auxiliary feeding
mechanism are arranged at a side surface of the material chamber,
the main hydraulic cylinder is mounted on a water rinsing bath, and
the auxiliary hydraulic cylinder is mounted above the main
hydraulic cylinders.
[0007] Preferably, a distribution valve, a rear friction plate, a
distribution valve friction plate, a rubber spring, a sealing ring
and a front friction plate are disposed inside the material
chamber, the rubber spring is disposed between the distribution
valve friction plate and the distribution valve, baffle plates are
disposed at both wings of the distribution valve friction plate,
and the sealing ring is disposed between the distribution valve and
the front friction plate.
[0008] Preferably, an opening of the front end of the distribution
valve is in a shape same as the discharge port swept by swing of
the distribution valve, a shape of an upper part of an opening of
the rear end of the distribution valve is same as a shape of the
auxiliary concrete cylinder swept by the swing of the distribution
valve, and a shape of a lower part of the opening of the rear end
of the distribution valve is same as a shape of the concrete
cylinder swept by the swing of the distribution valve.
[0009] Preferably, in the swinging process of the distribution
valve, the rear end of the distribution valve always is in
communication with the auxiliary concrete cylinder, and the front
end of the distribution valve always is in communication with the
discharge port.
[0010] Preferably, the front friction plate is disposed between the
distribution valve and the discharge port, and the distribution
valve friction plate and the rear friction plate are disposed
between the distribution valve and the concrete cylinder of the
concrete feeding mechanism; one through-hole is disposed on the
front friction plate, and three through-holes are disposed on the
rear friction plate; the distribution valve friction plate and the
rear friction plate are in close contact.
[0011] Preferably, the concrete cylinder of the concrete feeding
mechanism sucks a material from the material chamber, the concrete
feeding mechanism pushes the material in the concrete cylinder to
the distribution valve through the concrete piston, so that the
material reaches the discharge port through the distribution valve;
when any of the concrete feeding mechanisms pumps the material, the
auxiliary concrete piston in the auxiliary feeding mechanism
retracts to enable the auxiliary concrete cylinder to suck the
material from the distribution valve; when the distribution valve
swings, the material in the auxiliary concrete cylinder is pushed
to the distribution valve.
[0012] Preferably, when the auxiliary concrete piston in the
auxiliary concrete cylinder pushes the material, baffle plates at
both wings of the distribution valve friction plate block outlets
of the concrete cylinders.
[0013] Beneficial effects of the present disclosure can be realized
as follows: (1) the auxiliary feeding mechanism and the concrete
feeding mechanism jointly pump the material in the material chamber
to the distribution valve; when the concrete piston pushes the
material, the auxiliary concrete piston retracts to enable the
auxiliary concrete cylinder to suck part of material; when the
concrete cylinder is blocked by the distribution valve friction
plate, the auxiliary concrete cylinder pumps the material, thereby
solving the pumping pulsation problem caused by the swing of the
distribution valve when two hydraulic cylinders pump the material;
at the same time, parallel arrangement of the concrete feeding
mechanism and the auxiliary feeding mechanism realizes a compact
structure of the pumping mechanism, and pumping by the auxiliary
feeding mechanism in the material chamber is more conducive to
sealing; (2) friction plates are disposed at the front and rear
ends of the distribution valve respectively, and the distribution
valve friction plate and the front friction plate each are made of
hard alloy, thereby strengthening sealing, preventing quick wear
caused by the swing of the distribution valve, and prolonging the
service life of equipment; the rubber spring is disposed between
the distribution valve friction plate and the distribution valve to
ensure close contact between the distribution valve friction plate
and the rear friction plate, thereby strengthening sealing and
improving stability of the distribution valve in the swinging
process; (3) the swing arm is mounted through the spline in
cooperation with the mandrel, and the mandrel is mounted through a
mandrel cover in cooperation with a fitting slot at an upper part
of the distribution valve to enable the mandrel to swing
effectively along with the swing arm, thereby facilitating
mounting.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a schematic diagram illustrating an overall
structure of a pulsation-free wet spraying machine according to an
example of the present disclosure.
[0015] FIG. 2 is a schematic diagram illustrating mounting
structures of a pumping mechanism and a swing mechanism according
to an example of the present disclosure.
[0016] FIG. 3 is a schematic diagram illustrating partial
structures of a pumping mechanism and a swing mechanism according
to an example of the present disclosure.
[0017] FIG. 4 is a sectional schematic diagram illustrating
structures of a pumping mechanism and a swing mechanism according
to an example of the present disclosure.
[0018] FIG. 5 is a schematic diagram illustrating a swing mechanism
according to an example of the present disclosure.
[0019] FIG. 6 is a mounting schematic diagram illustrating a
distribution valve according to an example of the present
disclosure.
[0020] FIG. 7 is a schematic diagram illustrating a swing structure
of a distribution valve according to an example of the present
disclosure.
[0021] FIG. 8 is a structural schematic diagram illustrating a rear
friction plate of a distribution valve according to an example of
the present disclosure.
[0022] FIG. 9 is a structural schematic diagram illustrating a
distribution valve friction plate according to an example of the
present disclosure.
[0023] FIG. 10 is a structural schematic diagram illustrating a
front friction plate of a distribution valve according to an
example of the present disclosure.
[0024] Numerals of the drawings are described as follows: 1--frame,
2--pumping mechanism, 3--swing mechanism, 4--hydraulic system,
21--hopper, 22--material chamber, 222--front friction plate,
223--rear friction plate, 224--distribution valve friction plate,
225--rubber spring, 226--sealing ring, 23--concrete feeding
mechanism, 231--concrete piston, 232--piston rod, 233--concrete
cylinder, 234--main hydraulic cylinder, 24--auxiliary feeding
mechanism, 241--auxiliary concrete piston, 242--auxiliary piston
rod, 243--auxiliary concrete cylinder, 244--auxiliary hydraulic
cylinder, 25--discharge port, 26--distribution valve, 27--water
rinsing bath, 31--swing hydraulic cylinder, 32--swing arm,
33--swing hydraulic cylinder base, 34--mandrel, and 341--mandrel
cover.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] As shown in FIGS. 1-10, a specific implementation of a
pulsation-free wet spraying machine according to the present
disclosure is described below.
[0026] Specifically, as shown in FIG. 1, the pulsation-free wet
spraying machine includes a frame 1, a pumping mechanism 2, a swing
mechanism 3 and a hydraulic system 4. Wheels are disposed on the
frame 1 to facilitate movement of the wet spraying machine; the
hydraulic system 4 includes a hydraulic oil tank and a motor, the
hydraulic oil tank is disposed at an upper part of the frame 1, the
motor and the hydraulic oil tank drive hydraulic cylinders of the
swing mechanism 3 and the pumping mechanism 2 to move, and thus,
the structure outputs stable power safely and reliably; the swing
mechanism 3 and the pumping mechanism 2 are mounted cooperatively,
a concrete feeding mechanism 23 of the pumping mechanism 2 is
disposed at the bottom of the frame 1, and a hopper 21 of the
pumping mechanism 2 is disposed at an upper front part of the
frame. In this case, the pumping mechanism 2 realizes material
pumping, and the swing mechanism 3 brings a distribution valve 26
to swing through swing of a mandrel 34.
[0027] As shown in FIGS. 2-4, the pumping mechanism 2 includes a
hopper 21, a material chamber 22, a concrete feeding mechanism 23,
an auxiliary feeding mechanism 24, a distribution valve 26, a
discharge port 25 and a water rinsing bath 27. The hopper 21 is
mounted above the material chamber 22, and a lower end of the
hopper 21 is connected with the material chamber 22. The concrete
feeding mechanism 23 includes two main hydraulic cylinders 234, two
concrete pistons 231 and two concrete cylinders 233. The auxiliary
feeding mechanism 24 includes an auxiliary hydraulic cylinder 244,
an auxiliary concrete piston 241 and an auxiliary concrete cylinder
243. Two concrete cylinders 233 of the concrete feeding mechanism
23 are symmetrically arranged at a side surface of the material
chamber 22, the concrete cylinders 233 of two concrete feeding
mechanisms 23 communicate with the material chamber 22, and the
auxiliary concrete cylinder 243 of the auxiliary feeding mechanism
24 communicates with the distribution valve 26. The distribution
valve 26 is disposed inside the material chamber 22 and
communicates with the concrete cylinder 233 of the concrete feeding
mechanism, the auxiliary concrete cylinder 243 and the discharge
port 25. The water rinsing bath 27 is mounted at a rear side of the
concrete feeding mechanism 23, the auxiliary feeding mechanism 24
is mounted above the concrete feeding mechanism 23, hydraulic
mechanisms are arranged in a centralized way, and a pulling rod is
disposed between the water rinsing bath 27 and the material chamber
22. A distribution valve 26, a rear friction plate 223, a
distribution valve friction plate 224, a rubber spring 225, a
sealing ring 226 and a front friction plate 222 are disposed inside
the material chamber 22, the rubber spring 225 is disposed between
the distribution valve friction plate 224 and the distribution
valve 26, and the sealing ring 226 is disposed between the
distribution valve 26 and the front friction plate 222, where the
sealing ring 226 is a kidney-shaped ring. The front friction plate
222 is disposed at a side of the distribution valve 26 connected
with the discharge port 25, and the distribution valve friction
plate 224 is disposed at a side of the distribution valve 26
connected with the concrete cylinder 233 of the concrete feeding
mechanism 23, the rear friction plate 223 is also disposed between
the material chamber 22 and the distribution valve 26, where one
through-hole with a diameter same as that of discharge port 25 is
disposed on the front friction plate 222, and two through-holes
with a diameter same as the cylinder bore of the concrete cylinder
233 of the concrete feeding mechanism and one through-hole with a
diameter same as the cylinder bore of the auxiliary concrete
cylinder 243 of the auxiliary feeding mechanism are disposed on the
rear friction plate 223. The friction plates are disposed at the
front and rear ends of the distribution valve respectively and the
friction plates are made of hard alloy, thereby strengthening
sealing, preventing quick wear caused by the swing of the
distribution valve, and prolonging the service life of equipment.
The rubber spring 225 is disposed between the distribution valve
friction plate 224 and the distribution valve 26 to ensure close
contact between the distribution valve friction plate and the rear
friction plate, thereby strengthening sealing and improving
stability of the distribution valve in the swinging process.
[0028] As shown in FIG. 4, the concrete piston 231 is disposed at
an end of the piston rod 232 of the concrete feeding mechanism 23
of the pumping mechanism 2, the concrete piston 231 of the concrete
feeding mechanism 23 extends and retracts in the concrete cylinder
233, and the concrete cylinder 233 is in direction communication
with the material chamber 22. The auxiliary concrete piston 241 is
disposed at an end of the auxiliary piston rod 242 of the auxiliary
feeding mechanism 24, the auxiliary concrete piston 241 of the
auxiliary feeding mechanism extends and retracts in the auxiliary
concrete cylinder 243, and the auxiliary concrete cylinder 243 is
in direction communication with the distribution valve 26. The
auxiliary feeding mechanism 24 and the concrete feeding mechanism
23 jointly pump the material in the material chamber 22 to the
distribution valve 26, thereby solving the pumping pulsation
problem caused by the swing of the distribution valve 26 when two
hydraulic cylinders pump the material; at the same time, the
parallel arrangement of the concrete feeding mechanism 23 and the
auxiliary feeding mechanism 24 realizes the compact structure of
the pumping mechanism 2, and pumping by the auxiliary feeding
mechanism 24 in the material chamber 22 is more conducive to
sealing. Further, the material is directly pumped from the material
chamber 22, thereby ensuring a pumping pressure.
[0029] As shown in FIGS. 6-10, a main body of the distribution
valve 26 of the pumping mechanism 2 is a reducer, an opening of the
front end of the distribution valve 26 is in a shape same as that
of the discharge port 25 swept by the swing of the distribution
valve 26, a shape of an upper part of an opening of the rear end of
the distribution valve 26 is same as a shape of the auxiliary
concrete cylinder 243 swept by the swing of the distribution valve
26, and a shape of a lower part of the opening of the rear end of
the distribution valve 26 is same as a shape of the concrete
cylinder 233 swept by the swing of the distribution valve 26. The
front end of the distribution valve 26 is an end connecting the
distribution valve and the discharge port, and the rear end of the
distribution valve 26 is an end connecting the distribution valve
and both of one concrete cylinders 233 and the auxiliary concrete
cylinder 243. The rear end of the distribution valve 26 is an inlet
end in communication with the auxiliary hydraulic cylinder, the
front end of the distribution valve 26 is an outlet end in
communication with the discharge port 25, and the distribution
valve friction plate 224 and the rear friction plate 223 are in
close contact. The distribution valve 26 swings along with the
mandrel 34 of the swing mechanism. In the swinging process, the
front end of the distribution valve 26 is always in communication
with the discharge port 25, and the rear end of the distribution
valve 26 is in communication with the concrete cylinder 233 of one
concrete feeding mechanism 23 and the auxiliary concrete cylinder
243 of the auxiliary feeding mechanism 24 for pumping the material.
By designing a reasonable shape of the distribution valve, the
distribution valve can communicate the concrete cylinder 233 and
the auxiliary concrete cylinder 243 with the discharge port 25
during its swing with sealing of the distribution valve maintained,
especially the distribution valve is always made to be in
communication with the auxiliary concrete cylinder 243. Thus, the
continuous material pumping can be guaranteed.
[0030] As shown in FIG. 5, the swing mechanism includes a swing
hydraulic cylinder 31, a mandrel 34, a swing arm 32 and a swing
hydraulic cylinder base 33. The swing hydraulic cylinder base 33 is
mounted at an outer side of the material chamber 22, the swing
hydraulic cylinders 31 are symmetrically arranged at both sides of
the swing hydraulic cylinder base 33, and the swing arm 32 is
hinged with the swing hydraulic cylinders 31 and mounted through a
spline in cooperation with the mandrel 34. The swing hydraulic
cylinder base 33 is in a trapezoidal-shape, the swing arm 32 is
mounted at a short-side position of the hydraulic cylinder base 33,
and two swing hydraulic cylinders 31 are arranged at two inclined
sides of the swing hydraulic cylinder base 33 respectively. During
work, when one swing hydraulic cylinder 31 extends, the other
retracts. In this way, the work is repeated to drive the mandrel 34
to swing so as to bring the distribution valve 26 to swing. The
mandrel 34 is of a pipe-shaped structure square in the middle and
circular at both ends, a square section of the mandrel 34 is
mounted through a mandrel cover 341 in cooperation with a fitting
slot at an upper part of the distribution valve 26, and the mandrel
cover 341 is fixed with nuts. The distribution valve 26 swings
along with the mandrel 34. The swing arm 32 is mounted through the
spline in cooperation with the mandrel 34, and the mandrel 34 is
mounted through the mandrel cover 341 in cooperation with the
fitting slot at the upper part of the distribution valve 26, so
that the mandrel 34 swings effectively along with the swing arm 32
to facilitate mounting. The hydraulic system 4 includes a hydraulic
oil tank and a motor, and the pumping mechanism 2, the swing
mechanism 3 and the hydraulic system 4 are all disposed on the
frame 1.
[0031] The above pulsation-free wet spraying machine specifically
works in the following process: firstly, the material is poured
into the hopper 21, and then, the material in the hopper 21 enters
the material chamber 22 due to gravity; one of the concrete feeding
mechanisms 23 sucks the material into the concrete cylinder 233
from the material chamber 22 by retracting the concrete piston 231,
and the piston rod 232 of the other concrete feeding mechanism 23
pushes the concrete piston 231 to push the material in the concrete
cylinder 233 to the discharge port 25 through the distribution
valve 26; when the distribution valve 26 rotates along with the
mandrel 34 of the swing mechanism 3, the concrete piston 231 in the
concrete cylinder 233 completing sucking pushes the material, and
the concrete feeding mechanism 23 completing feeding sucks the
material into the concrete cylinder 233 from the material chamber
22; when any concrete feeding mechanism 23 pumps the material, the
auxiliary feeding mechanism 24 sucks the material from the
distribution valve 26; when the distribution valve 26 swings, the
auxiliary feeding mechanism 24 replenishes the material; when the
auxiliary concrete piston 241 in the auxiliary concrete cylinder
243 pushes the material, baffle plates at both wings of the
distribution valve friction plate 224 block outlets of the concrete
cylinders 233; therefore, the feeding pulsation phenomenon and the
sprayed concrete rebound phenomenon are avoided.
[0032] Parts unmentioned in the present disclosure may be realized
by adopting or referring to the prior art.
[0033] Of course, the above descriptions are not intended to limit
the present disclosure, and the present disclosure also is not
limited to the above examples. Variations, modifications, additions
or substitutions made by persons skilled in the art within the
substantive scope of the present disclosure shall also belong to
the scope of protection of the present disclosure.
* * * * *