JP2003028054A - Method and device for cleaning oscillation valve type concrete pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform cleaning work effectively without escaping pressure from a boundary of a valve plate at an intake and discharge port part of a hopper and a valve ring of a front end of an oscillation pipe. SOLUTION: A piston stop position y is set in further front of a piston changeover position x to one main hydraulic cylinder 6a out of two main hydraulic cylinders 6a, 6b. When a main hydraulic piston 7a of the main hydraulic cylinder 6a is moved in the piston stop position, a concrete piston 4a of a concrete cylinder 3a connected to the main hydraulic piston 7a is intruded to a front end part position in the oscillation pipe 11 corresponding to the intake and discharge port 2a, and is stopped, and the boundary of the valve plate 13 and the valve ring 12 is sealed. Cleaning fluid is fed by pressure in the oscillation pipe 11, a packing 19 previously pressed in the oscillation pipe 11 is moved in the concrete transport pipe 10, and is discharged from a nozzle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning an oscillating valve type concrete pump for discharging and cleaning residual concrete in the oscillating pipe and the concrete transport pipe after the concrete placing work by the oscillating valve type concrete pump is completed. And the device.

[0002]

2. Description of the Related Art An oscillating valve type concrete pump is provided with two suction and discharge ports 2a and 2b arranged side by side on the lower part of a front side wall 1a of a hopper 1, as shown in FIG. 4 and FIG. On the front side of the hopper 1, the above-mentioned two suction / discharge ports 2 are provided.
Two concrete cylinders 3 communicating with a and 2b respectively
a and 3b are installed in parallel, and each concrete cylinder 3
Concrete pistons 4a, 4b housed in a, 3b
Are integrally connected to the main hydraulic pistons 7a and 7b in the main hydraulic cylinders 6a and 6b connected to the concrete cylinders 3a and 3b through the cleaning chamber 5 through the rods 8a and 8b, respectively. The concrete hydraulic pistons 7a and 7b in the hydraulic cylinders 6a and 6b are alternately moved forward and backward to alternately move the concrete pistons 4a and 4b forward and backward.

Further, an oscillating tube 11 bent into an S shape is housed in the hopper 1, and a valve ring 12 is attached to the front end of the oscillating tube 11 so that the valve ring 12 is attached to the hopper 1. Slides along the valve plate 13 attached to the inner surface of the front side wall 1a of the
2b, and the rear end of the oscillating pipe 11 is connected to the concrete transport pipe 10 through a discharge flange 9 that is connected to the rear side wall 1b of the hopper 1.
Further, the rocking shaft 15 fixed in the middle of the rocking pipe 11 in accordance with the rocking shaft center of the rear end portion of the rocking pipe 11 is provided to two rocking cylinders 14a and 14b installed outside the hopper 1. The rocking tube 11 can be rocked in the left-right direction about the rocking shaft 15 by connecting the rocking tube 11 via the operation lever 16 and tilting the operation lever 16 to the left and right.

In FIG. 5, reference numeral 17 denotes a stirring blade for allowing the concrete 18 to flow downward while stirring.

The concrete 18 in the hopper 1 is operated by operating the suction / discharge valve of the conventional rocking valve type concrete pump.
The oscillating tube 11 is swung in the hopper 1 to inhale and discharge the oscillating tube 11. When the front end of the oscillating tube 11 communicates with either one of the inhaling and discharging ports 2a or 2b, the oscillating tube 11
Concrete piston 4a of the concrete cylinder 3a or 3b on the side of the suction / discharge port 2a or 2b which is communicated with
Alternatively, the concrete pipe 18 which has been sucked into the concrete cylinder 3a or 3b is moved forward by moving the rocking pipe 1b.
At the same time, the concrete piston 4b or 4a is retracted in another concrete cylinder 3b or 3a so that the concrete 18 in the hopper 1 is sucked through the other suction / discharge port 2b or 2a. The moving pipe 11 is switched to the intake / exhaust port 2b or 2a, which has been the intake side, and the piston 4b or 4a of the concrete cylinder 3b or 3a on the intake / exhaust port 2b or 2a side is moved forward. Further, the concrete 18 is sucked into the concrete cylinder 3a or 3b on the suction / discharge port 2a or 2b side, and the suction / discharge of the concrete 18 is switched by repeating such an operation.

In the rocking valve type concrete pump described above, when the operation of placing the concrete 18 is completed, the concrete 18 remaining in the rocking pipe 11 as a rocking valve and the concrete transport pipe 10 is discharged and washed. There is a need to.

Conventionally, as a method of cleaning the inside of the rocking pipe 11 and the inside of the concrete transporting pipe 10, the rocking pipe 11 is flipped upward and the rocking pipe 11 is passed through an opening provided in the front side wall 1a of the hopper. The inside of the rocking pipe 11 is filled with a filling so that the inside of the concrete transport pipe 10 is pressure-fed.
Alternatively, in the case of concrete pressure-feeding work, a filling material 19 such as a cleaner sponge is pushed into one of the concrete cylinders 3a or 3b through the suction / discharge port 2a or 2b of the hopper 1 and the filling material 19 is moved into the rocking pipe 11. Similarly, the rocking pipe 11 is rocked so as to be alternately aligned with the two suction and discharge ports 2a and 2b, and the concrete pistons 4a and 4b are alternately moved forward and backward to move the filling 19 with water pressure or air pressure. By moving the inside of the rocking pipe 11 into the concrete transporting pipe 10 and discharging the residual condensate from a tip hose (not shown) which is a tip of the concrete transporting pipe 10, the rocking pipe 11 and the concrete transporting pipe 10 are discharged. There is one that is designed to be cleaned by itself.

[0008]

However, in the case of the former method of flipping up the rocking tube 11 to clean it, the rocking tube 1 is used.
It is necessary to separately install a mechanism for flipping 1 upward, and in the case of the latter self-cleaning method, padding 19
Is intended to be pressure-fed in the rocking pipe 11 and the concrete transport pipe 10 by water or air, the sliding surface between the valve plate 13 and the valve ring 12 is worn, and the valve plate 13 and the valve ring are worn. When a gap is formed between the pad 12 and 12, it is conceivable that water or air that tries to feed the filling 19 may leak from the gap and the filling 19 may not be fed sufficiently.

In view of the above, the present invention provides a cleaning method and apparatus in which a filling fluid is pressure-fed with a cleaning fluid such as water or air to clean the inside of the rocking pipe or the concrete transport pipe. It is intended to make it possible to perform stable washing even if the temperature drops.

[0010]

According to the present invention, in order to solve the above-mentioned problems, a valve ring is provided at a front end of a hopper and a rear end of the hopper is connected to a concrete transportation pipe through a discharge flange of a rear side wall of the hopper. The oscillating tube is housed, and when the oscillating tube oscillates to the left and right, the valve ring slides along the valve plate mounted on the inner surface of the hopper front side wall and alternates between the left and right intake ports on the hopper front side wall. To be able to match
In addition, two concrete cylinders respectively communicating with the two suction and discharge ports are installed on the front side of the hopper, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder. By a swinging valve type concrete pump that is connected and alternately advances the main hydraulic piston of the main hydraulic cylinder to the piston switching position, which is the stroke end position on the forward side, to suck and discharge the concrete in the hopper. After the concrete pouring work is completed, the filling is put into one of the concrete cylinders through one of the suction and discharge ports, and the rocking pipe is aligned with the suction and discharge port communicating with the concrete cylinder containing the filling, and then, A concrete pipe in a concrete cylinder communicating with the rocking pipe. Ton is passed through the boundary between the valve plate and the valve ring and inserted into the oscillating tube to move the filling into the oscillating tube, and then the insertion state of the concrete piston into the oscillating tube is maintained. Cleaning of a rocking valve type concrete pump in which a cleaning fluid is pressure-fed into the rocking pipe so that the filler pushed into the rocking pipe is moved from the inside of the rocking pipe into the concrete transport pipe to be discharged for cleaning. In the hopper, a rocking pipe having a valve ring at the front end and a rear end connected to a concrete transportation pipe through a discharge flange on the rear wall of the hopper is housed, and the rocking pipe is rocked to the left and right. The movement causes the valve ring to slide along the valve plate attached to the inner surface of the hopper front side wall so as to alternately coincide with the two intake and discharge ports on the left and right sides of the hopper front side wall. On the side, the above-mentioned 2
Two concrete cylinders, which communicate with each of the intake and discharge ports, are installed, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder, and the main hydraulic piston of the main hydraulic cylinder is connected. Of the rocking valve type concrete pump, in which concrete in the hopper is sucked and discharged by alternately advancing the piston to the piston switching position which is the stroke end portion on the forward side. The piston is provided with a flow passage hole penetrating in the front-rear direction, a check valve is provided in the forward direction at the portion of the flow passage hole, and the check valve is connected to a cleaning fluid pipe connected to the cleaning fluid pumping device. In addition, a concrete piston equipped with the above check valve should Cleaning device for a rocking valve type concrete pump having a structure in which the stroke of the main hydraulic piston of the main hydraulic cylinder can be lengthened so that it can be advanced to a position where it passes through the boundary between the valve and the valve ring and enters the rocking pipe. And

When the concrete piston having the flow passage hole is inserted into the rocking pipe during the cleaning operation, the boundary between the valve plate and the valve ring can be sealed.
In this state, if the cleaning fluid is pumped into the oscillating pipe through the flow path hole of the concrete piston, even if there is a gap at the boundary between the valve plate and the valve ring, the cleaning fluid will not leak from the gap and the filling will be compressed by the fluid pressure. It can be moved inside the rocking pipe and can be discharged from the tip of the concrete transport pipe for cleaning.

Further, a rocking pipe having a valve ring at the front end and a rear end connected to a concrete transportation pipe through a discharge flange on the rear wall of the hopper is housed in the hopper, and the rocking pipe is rocked to the left and right. Due to the movement, the valve ring slides along the valve plate attached to the inner surface of the front wall of the hopper so as to alternately coincide with the two intake and discharge ports on the left and right sides of the front wall of the hopper. Two concrete cylinders that communicate with each of the intake and discharge ports are installed, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder, and the main hydraulic piston of the main hydraulic cylinder is connected. Of the concrete in the hopper by alternately advancing to the piston switching position which is the stroke end part of the advancing side. After the concrete pouring work is completed by the rocking valve type concrete pump, the filling is put into one of the concrete cylinders through one of the suction and discharge ports and communicates with the concrete cylinder containing the filling. The rocking pipe is aligned with the suction / discharge port, and then the main hydraulic piston of the main hydraulic cylinder is alternately advanced to the piston switching position to idle the concrete piston in the concrete cylinder to shake the filling. After passing through the moving pipe into the concrete transport pipe, and then inserting the concrete piston in the concrete cylinder communicating with the rocking pipe into the rocking pipe by passing through the boundary between the valve plate and the valve ring, Cleaning flow into the oscillating pipe while maintaining the state of insertion of the piston into the oscillating pipe. Is a method for cleaning a rocking valve type concrete pump in which the filling material that has been transferred into the concrete transport pipe is moved and discharged to perform cleaning. Also, in the hopper, there is a valve ring at the front end. The oscillating pipe whose rear end is connected to the concrete transport pipe through the discharge flange of the hopper rear side wall is housed, and the valve ring is attached to the inner surface of the hopper front side wall by swinging the oscillating pipe left and right. Two concrete cylinders that slide along the valve plate so that they can alternately coincide with the two intake and discharge ports on the left and right sides of the front wall of the hopper, and that communicate with the two intake and discharge ports on the front side of the hopper. And the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder, By alternately advancing the main hydraulic piston of the Linda to the piston switching position, which is the stroke end portion position on the advancing side, the concrete in the hopper is sucked and discharged, and the rear wall of the hopper of the swing valve type concrete pump The discharge flange is provided with a flow passage hole penetrating inward and outward, a check valve is provided inward at the portion of the flow passage hole, and the check valve is connected to a cleaning fluid pumping device. A main hydraulic piston of the main hydraulic cylinder that connects the pipes and further advances the concrete piston in one of the concrete cylinders to a position where it passes through the boundary between the valve plate and the valve ring and enters the swing pipe. By using a cleaning device for an oscillating valve type concrete pump having a structure in which the stroke of the Sealing of the gap between the valve plate and the valve ring can be cleaned with stable lowered.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the construction similar to the concrete pump shown in FIGS. 4 and 5, the inner diameters of the suction / discharge ports 2a and 2b and the rocking pipe 11 are made of concrete. Assuming that the pistons 4a and 4b can be inserted, and that the main hydraulic cylinders 6a and 6b can obtain a stroke longer than the stroke during concrete pouring work, the stroke end portion position on the forward side is
A main hydraulic piston switching position x at the time of concrete pouring work is set, and the proximity sensor LS. 1, LS. 2 is installed, and the concrete piston 4a in the concrete cylinder 3a is located at a position in front of the main hydraulic piston switching position x of one of the main hydraulic cylinders 6a (or 6b) during the cleaning work. The piston stop position y is set so that the piston stop position y can be stopped by passing through the boundary with the rocking pipe 11 and further stopping the concrete piston 4a.
A flow path hole 20 is provided in the flow path hole 20, and the rocking tube 11 is provided in the flow path hole 20 portion.
A check valve 21 is assembled so that a cleaning fluid such as water or air flows inward, and a cleaning fluid pipe 23 from a cleaning fluid pressure-feeding device 22 such as a water pump or a compressor is attached to the check valve 21 from the cleaning chamber 5. Allows for detachable connection.

As shown in the enlarged view of FIG. 2, the check valve 21 is provided with a through hole 24 at a required position of the concrete piston 4a in the advancing / retracting direction (front-back direction) of the concrete piston 4a. A pressure receiving rod 26 having a flow passage hole 20 at a plurality of peripheral portions and a flange 25 at a rear end portion is slidably inserted into the through hole 24 from the rear surface (rear surface) side of the concrete piston 4a. By fitting a valve plate 27 having a size that closes each of the flow passage holes 20 to the tip end portion of the pressure receiving rod 26 projecting to the front surface side of the piston 4a and screwing a double nut 28 into the tip screw portion. The compression spring 2 is held between the flange 25 of the pressure receiving rod 26 and the back surface of the concrete piston 4a.
9 so that the flow passage hole 20 is normally closed by the valve plate 27 by the elastic force of the compression spring 29, and the pressure acts on the flange 25 to compress the compression spring 29. Then, the flow path hole 20 is opened, and the valve box 30 is formed on the back side of the concrete piston 4a so as to form a required space around the rear end portion of the pressure receiving rod 26 and hermetically surround it. A cleaning fluid inlet 31 is provided on the rear surface of the valve box 30, and the cleaning fluid pipe 23 is detachably connected to the cleaning fluid inlet 31. Pressure acts on the flange 25 of the pressure receiving rod 26, and the pressure receiving rod 26 is advanced against the compression spring 29.
The flow path hole 20 that has been blocked by is opened so that the cleaning fluid is pumped toward the oscillating tube 11.

The two main hydraulic cylinders 6a and 6b are also provided.
Is the proximity sensor LS. 1, LS. Based on the signal from 2, the forward / backward movement can be switched by a known hydraulic circuit. That is, the main hydraulic cylinder 6a,
6b connects the rod-side pressure chambers with each other through the sealing line 32, and the head-side pressure chamber is connected to the pump 34 and the tank 35.
Connected to the pressure oil supply / discharge line 33, and provided in the middle of the pressure oil supply / discharge line 33 is a main switching valve 37 which can be switched by the operation of the electromagnetic four-way valve 36, and the proximity sensor LS. 1 or LS. Electromagnetic four-way valve 36 with signal from 2
Solenoid SOL. 1 or SOL. 2 is excited to switch the electromagnetic four-way valve 36 to the port a side or the b side, so that the main switching valve 37 is switched to the port a side or the b side to alternately move the main hydraulic cylinders 6a and 6b forward and backward. Further, the oscillating tube 11 as an oscillating valve can be switched at this operation and a required timing.
38 indicates a safety valve.

When the rocking pipe 11 and the concrete transport pipe 10 are washed after the concrete pouring work is completed, the rocking pipe 11 is manually operated so that the suction pipe is connected to the suction port as shown by the chain double-dashed line in FIG. 2b side, while the main hydraulic piston 7a of the main hydraulic cylinder 6a is further retracted from the backward stroke end position at the time of placing concrete to position the back surface of the concrete piston 4a in the cleaning chamber 5, The fluid inlet hole 3 of the check valve 21 exposed at the rear surface of the concrete piston 4a
1, a cleaning fluid pipe 23 is connected to the cleaning chamber 5 through the cleaning chamber 5.

Next, from the inside of the hopper 1, the suction / discharge port 2a
Insert a filling material 19 such as a cleaner sponge into the concrete cylinder 3a through the
The rocking pipe 11 located at b is switched to the intake / discharge port 2a side to communicate with the concrete cylinder 3a, and thereafter, the main hydraulic piston 7a of the main hydraulic cylinder 6a is moved to the piston switching position x at the time of placing concrete. Further forward to the piston stop position y, the concrete piston 4a of the concrete cylinder 3a passes through the boundary between the valve plate 13 and the valve ring 12 as shown by the chain double-dashed line in FIG. It is advanced to a position where it enters the front end portion of 11 and stopped. As a result, the boundary between the valve plate 13 and the valve ring 12 can be sealed with the concrete piston 4a, and the padding 19 can be pushed into the rocking tube 11.

In the above state, the cleaning fluid pressure feeding device 2
2 is driven so that the cleaning fluid is pumped from the cleaning fluid pipe 23 through the check valve 21 into the oscillating pipe 11. In this case, when the cleaning fluid is sent into the valve box 30, the check valve 21 is compressed by the compression spring 2 due to the pressure of the cleaning fluid.
The pressure receiving rod 26 is advanced against 9 and
Since the valve plate 27 pressed against the front surface of the concrete piston 4a is separated, the flow passage hole 20 is opened, so that the cleaning fluid in the valve box 30 passes through the flow passage hole 20 and the cleaning fluid of the concrete piston 4a. It will be discharged to the front. Therefore, the pressure of the cleaning fluid moves the filling material 19 from the inside of the rocking pipe 11 into the concrete transport pipe 10 and discharges the residual condensate from the tip of the concrete transport pipe 10, whereby the rocking pipe 11 and the concrete transport pipe 10 are discharged. The inside of 10 can be washed.

During the cleaning operation, even if there is a gap at the boundary between the valve plate 13 and the valve ring 12, since this gap is closed by the concrete piston 4a, the pressure of the cleaning fluid does not escape. The padding 19 can be effectively acted as a pumping force, and the cleaning work can be efficiently performed.

Next, FIG. 3 shows another embodiment of the present invention. In the structure similar to that of the rocking valve type concrete pump shown in FIGS. 1 and 2, the flow provided on the concrete piston 4a is shown. Instead of assembling the check valve 21 in the passage hole 20, the passage hole 20 is provided at a required portion of the discharge flange 9 that is continuously provided on the hopper rear side wall 1b.
A check valve 21 is attached to the 0th section.

In this embodiment, when the cleaning work is performed, the filling 19 is pushed into the rocking pipe 11 from inside the concrete cylinder 3a, and then the concrete cylinders 3a and 3
b, the blanking is performed for a required time, and the filling 19 is moved to the rocking tube 11
The inside is moved so as to be transferred into the concrete transport pipe 10, and then the concrete piston 4a is passed through the boundary between the valve plate 13 and the valve ring 12 into the rocking pipe 11 for cleaning. By driving the fluid pumping device 22 to pump the cleaning fluid from the cleaning fluid pipe 23 through the check valve 21 into the oscillating pipe 11, the padding 19 is transferred to the concrete transport pipe 1
It is possible to move the inside of 0 to wash the inside.

According to this embodiment, the cleaning fluid pipe 2
Since 3 can be left connected to the check valve 21, it is possible to smoothly shift to the cleaning work after the concrete pouring work.

In the above embodiment, the case where the main hydraulic cylinder 6a and the concrete cylinder 3a side are used for cleaning is shown, but the main hydraulic cylinder 6b and the concrete cylinder 3b side may be used. Needless to say, various changes can be made without departing from the scope of the present invention.

[0025]

As described above, according to the present invention, the swing pipe having the valve ring at the front end and the rear end connected to the concrete transport pipe through the discharge flange on the rear wall of the hopper is housed in the hopper. By swinging the swing tube to the left and right, the valve ring slides along the valve plate attached to the inner surface of the front wall of the hopper so that it can be alternately aligned with the two intake ports on the left and right of the front wall of the hopper. And, on the front side of the hopper, two concrete cylinders that respectively communicate with the two suction and discharge ports are installed, and the concrete piston of each concrete cylinder is connected to the concrete cylinder. Connected to
Concrete pouring by a rocking valve type concrete pump that sucks and discharges concrete in the hopper by alternately advancing the main hydraulic piston of the main hydraulic cylinder to the piston switching position which is the forward stroke end position. After completion of the work, put a filling into one of the concrete cylinders through one of the suction and discharge ports, align the swing pipe with the suction and discharge port communicating with the concrete cylinder containing the filling, and then swing the swing. The concrete piston in the concrete cylinder communicating with the pipe is moved into the rocking pipe by passing through the boundary between the valve plate and the valve ring and inserted into the rocking pipe, and then the rocking of the concrete piston is performed. The cleaning fluid is pressure-fed into the oscillating pipe while maintaining the inserted state in the oscillating pipe. Since there is a method and device for cleaning a rocking valve type concrete pump, in which the inserted filling is moved from the inside of the rocking pipe into the concrete transportation pipe and discharged for cleaning, the concrete piston is allowed to enter the inside of the rocking pipe. By doing so, even if there is a gap at the boundary between the valve plate and the valve ring, this gap can be closed with a concrete piston, and therefore the pressure of the cleaning fluid pumped into the oscillating pipe does not escape from the gap, Cleaning work can be performed efficiently, and a rocking pipe with a valve ring at the front end and a rear end connected to a concrete transport pipe through a discharge flange on the rear wall of the hopper is stored in the hopper, By swinging the moving tube to the left and right, the valve ring slides along the valve plate attached to the inner surface of the hopper front side wall, Two concrete cylinders are provided on the front side of the hopper so as to be able to coincide with the two intake and discharge ports on the left and right, respectively, and the concrete pistons of each of the concrete cylinders are connected to the two concrete cylinders. , Connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder,
Concrete pouring by a rocking valve type concrete pump in which the concrete in the hopper is sucked and discharged by alternately advancing the main hydraulic piston of the main hydraulic cylinder to the piston switching position which is the stroke end part on the forward side. After completion of the work, put a filling into one of the concrete cylinders through one of the above-mentioned suction and discharge ports, align the rocking pipe with the suction and discharge port that communicates with the concrete cylinder containing the filling, and then The concrete piston in the concrete cylinder is blank driven by alternately advancing the main hydraulic piston of the hydraulic cylinder to the piston switching position, and the above filling is moved through the rocking pipe into the concrete transport pipe, and then the rocking pipe. Connect the concrete piston in the concrete cylinder that communicates with After being inserted into the rocking pipe by passing through the boundary between the plate and the valve ring, the cleaning fluid is pressure-fed into the rocking pipe while maintaining the insertion state of the concrete piston into the rocking pipe, so that By using the method and apparatus for cleaning a rocking valve type concrete pump that moves and discharges the transferred fillers, it is possible to smoothly move to the cleaning work after the concrete placing work. It exhibits excellent effects such as being able to perform cleaning work stably as well as being possible.

[Brief description of drawings]

FIG. 1 is a schematic sectional plan view showing an embodiment of a cleaning device for an oscillating valve type concrete pump of the present invention.

FIG. 2 is an enlarged cross-sectional view of a check valve used in the cleaning device of FIG.

FIG. 3 is a schematic sectional side view showing another embodiment of the present invention.

FIG. 4 is a schematic sectional side view showing an example of a swing valve type concrete pump.

5 is a view taken in the direction of arrow AA in FIG.

[Explanation of symbols]

1 hopper 1a front wall 1b Rear wall 2a, 2b Inhalation outlet 3a, 3b concrete cylinder 4a, 4b Concrete piston 6a, 6b Main hydraulic cylinder 7a, 7b Main hydraulic piston 9 Discharge flange 10 Concrete transport pipe 11 rocking tube 12 valve rings 13 valve plate 19 Cleaner sponge (filling) 20 channel holes 21 Check valve 22 Cleaning fluid pumping device 23 Cleaning fluid piping x Piston switching position y Piston stop position

Claims (4)

[Claims] 1. A oscillating pipe having a valve ring at the front end and a rear end connected to a concrete transportation pipe through a discharge flange on a rear wall of the hopper is housed in the hopper, and the oscillating pipe is rocked to the left and right. By the movement, the valve ring slides along the valve plate attached to the inner surface of the hopper front side wall so that it can be alternately aligned with the two intake ports on the left and right of the hopper front side wall.
In addition, two concrete cylinders respectively communicating with the two suction and discharge ports are installed on the front side of the hopper, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder. By a swinging valve type concrete pump that is connected and alternately advances the main hydraulic piston of the main hydraulic cylinder to the piston switching position, which is the stroke end position on the forward side, to suck and discharge the concrete in the hopper. After the concrete pouring work is completed, the filling is put into one of the concrete cylinders through one of the suction and discharge ports, and the rocking pipe is aligned with the suction and discharge port communicating with the concrete cylinder containing the filling, and then, A concrete pipe in a concrete cylinder communicating with the rocking pipe. Ton is passed through the boundary between the valve plate and the valve ring and inserted into the oscillating tube to move the filling into the oscillating tube, and then the insertion state of the concrete piston into the oscillating tube is maintained. A oscillating valve characterized in that a cleaning fluid is pressure-fed into the oscillating pipe so that the filling material pushed into the oscillating pipe is transferred from the oscillating pipe into the concrete transport pipe for discharging to perform cleaning. Method for cleaning concrete pumps. 2. A oscillating pipe having a valve ring at the front end and a rear end connected to a concrete transport pipe through a discharge flange on a rear wall of the hopper is housed in the hopper, and the oscillating pipe is rocked to the left and right. By the movement, the valve ring slides along the valve plate attached to the inner surface of the hopper front side wall so that it can be alternately aligned with the two intake ports on the left and right of the hopper front side wall.
In addition, two concrete cylinders respectively communicating with the two suction and discharge ports are installed on the front side of the hopper, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder. By a swinging valve type concrete pump that is connected and alternately advances the main hydraulic piston of the main hydraulic cylinder to the piston switching position, which is the stroke end position on the forward side, to suck and discharge the concrete in the hopper. After the concrete pouring work is completed, the filling is put into one of the concrete cylinders through one of the suction and discharge ports, and the rocking pipe is aligned with the suction and discharge port communicating with the concrete cylinder containing the filling, and then , Switch the main hydraulic piston of the main hydraulic cylinder to the piston switching position. By emptying the concrete piston in the concrete cylinder by advancing to the above, transferring the filling into the concrete transport pipe through the rocking pipe, and then moving the concrete piston in the concrete cylinder communicating with the rocking pipe into After being inserted into the rocking pipe by passing through the boundary between the valve plate and the valve ring, the cleaning fluid is pressure-fed into the rocking pipe while maintaining the insertion state of the concrete piston into the rocking pipe, thereby A method for cleaning an oscillating valve type concrete pump, characterized in that the filling material transferred to (1) is moved and discharged to perform cleaning. 3. A swing pipe having a valve ring at the front end and a rear end connected to a concrete transport pipe through a discharge flange on the rear wall of the hopper is housed in the hopper, and the swing pipe is swung to the left and right. By the movement, the valve ring slides along the valve plate attached to the inner surface of the hopper front side wall so that it can be alternately aligned with the two intake ports on the left and right of the hopper front side wall.
In addition, two concrete cylinders respectively communicating with the two suction and discharge ports are installed on the front side of the hopper, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder. Of the rocking valve type concrete pump which is connected to the main hydraulic piston of the main hydraulic cylinder and alternately advances the main hydraulic piston of the main hydraulic cylinder to the piston switching position which is the forward stroke end position to suck and discharge the concrete in the hopper. A concrete piston in one of the above concrete cylinders is provided with a passage hole penetrating in the front-rear direction, and a check valve is provided forward in the portion of the passage hole, and the washing fluid is pumped to the check valve. Connect the cleaning fluid pipe connected to the equipment, and further connect the cleaning fluid piping It is characterized in that the stroke of the main hydraulic piston of the main hydraulic cylinder can be lengthened so that the cleat piston can be advanced to a position where the cleat piston passes through the boundary between the valve plate and the valve ring and enters the swing pipe. Swing valve type concrete pump cleaning device. 4. A oscillating pipe having a valve ring at the front end and a rear end connected to a concrete transportation pipe through a discharge flange on a rear wall of the hopper is housed in the hopper, and the oscillating pipe is rocked to the left and right. By the movement, the valve ring slides along the valve plate attached to the inner surface of the hopper front side wall so that it can be alternately aligned with the two intake ports on the left and right of the hopper front side wall.
In addition, two concrete cylinders respectively communicating with the two suction and discharge ports are installed on the front side of the hopper, and the concrete piston of each concrete cylinder is connected to the main hydraulic piston of the main hydraulic cylinder connected to the concrete cylinder. Of the rocking valve type concrete pump which is connected to the main hydraulic piston of the main hydraulic cylinder and alternately advances the main hydraulic piston of the main hydraulic cylinder to the piston switching position which is the forward stroke end position to suck and discharge the concrete in the hopper. The discharge flange on the rear side wall of the hopper is provided with a flow passage hole penetrating inward and outward, and a check valve is provided inward at the portion of the flow passage hole. Connect the connected cleaning fluid pipe, and further add concrete in one of the above concrete cylinders. The rocking mechanism is characterized in that the stroke of the main hydraulic piston of the main hydraulic cylinder can be lengthened so that the stone can be advanced to a position where the stone passes through the boundary between the valve plate and the valve ring and enters the rocking pipe. Cleaning device for valve type concrete pump.