JPH067167Y2 - Conveyor pipe cleaning device for concrete pump - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a concrete pump capable of efficiently collecting cleaning water for discharging raw concrete remaining in a transport pipe after completion of concrete pouring work. The present invention relates to a transport pipe cleaning device.

[Prior Art] Generally, when pouring fresh concrete with a concrete pump car, the concrete pump car and the pouring site are connected by a transportation pipe, and the concrete is delivered to the pouring site through this transportation pipe. I try to send it in. Then, in order to remove the ready-mixed concrete remaining in the transport pipe at the end of the pressure-feeding work, the transport pipe is removed from the concrete pump, and high-pressure water or high-pressure air is sent into the transport pipe to push out the ready-mixed concrete to the pouring site. Work, that is, removal work called water washing or air washing is performed.

The former air cleaning is a relatively simple method, but the compressed air used for air cleaning not only carries with it the risk of sudden ejection or bursting, but also does not provide high pressure, so it can be used in high places or over long distances. There was a drawback that it was difficult to clean the pipe.

Therefore, the residual raw concrete in the transportation pipe is removed by the water supply device B having the water tank 31 and the water pump 32 as shown in FIG. In that case, as shown in FIG. 3, the base end portion 33 _a of the transport tube 33 separately from the concrete pump (not shown, the proximal end, connects the stuffing tube 35 in which the padding 34 such as sponge therein and (see FIG. 3), communicating the other end 35 _a of the packing tube 35 to the pumping pipe 36 on the discharge side of the water pump 32. then, packed than pumping pipe 36 by operating the water pump 32 of the water supply apparatus B High-pressure water is sent to the inlet pipe 35, and the pressure pushes the filling into the transport pipe 33, thereby pushing out the residual raw concrete in the transport pipe 33 to the other end 33 _b of the transport pipe 33 (on the construction site side). (See FIG. 4).

[Problems to be Solved by the Invention] In the case of the above-described vehicle-mounted concrete pump, the capacity of the water tank 31 is limited, and there may be no water source near the casting site. Is required to be used as effectively as possible. Therefore, it is desirable to collect the water once used for cleaning the transportation pipe 33, that is, the water filled in the transportation pipe 33 in FIG. 4 and reuse it for car washing and the like. This is also desirable from the viewpoint of preventing pollution by keeping sewage out. At that time, the recovery cutoff valve 38 of the recovery pipe 37 that connects the pressure feed pipe 36 and the water tank 31 is opened for recovery.
7 only communicates the pressure feed pipe 36 and the water tank 31, and can be collected when the position of the transport pipe 33 is higher than the water tank 31, but it is difficult to collect when the transport pipe 33 is higher. There was a problem that was.

[Means for Solving Problems] In order to solve the above problems, the present invention proposes a water tank and concrete transportation through a suction pipe for sucking water in the water tank through a suction pipe. A water pump for feeding the pipe is provided, and a recovery pipe for sucking the water in the transport pipe by the water pump and sending the water back is provided between the transportation pipe and the suction pipe, and the pressure feeding is also performed. The cleaning pipe is connected to the pipe.

[Operation] In such a transport pipe cleaning apparatus for a concrete pump, when feeding cleaning water to the transport pipe, the water is transported from the water tank through the suction pipe, the water pump, and the pressure pipe. Sent to. Also, when collecting the water in the transport pipe,
Water is sucked from a transport pipe through a recovery pipe and a suction pipe to a water pump, and is sprayed from a cleaning nozzle or the like through a cleaning pipe. Even when the position of the transportation pipe is lower than the position of the water tank, the residual water is smoothly collected by the suction force of the water pump, and the collected water can be used for car washing and the like.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a water supply device A mounted on a concrete pump car (not shown) for performing water washing work. 1 is a vehicle-mounted water tank, 2 is a cylinder 3 and an actuator _2a. Has a reciprocating piston 4,
This is a water pump in which check valves 5, 6, 7, and 8 are arranged at the ports provided on the piston head side and the rod side of the cylinder 3, respectively. The suction side of the water pump 2 is alternatively connected to the water tank 1 and the external water source pipe 11 via a suction pipe 9 and a three-way switching valve 10. The remaining one of the three-way switching valve 10 is closed. Further, a pressure-feeding pipe 12 is connected to the discharge side of the water pump 2, a pressure gauge 13 is installed in the pressure-feeding pipe 12, and a packing pipe 35 (the first pipe) for cleaning the transport pipe is installed via an opening / closing valve 14. 3 and 4) (see FIG. 3 and FIG. 4) via _a joint 15a such as a flange, and a car wash nozzle 17 through _a cleaning pipe 16a such as a flexible hose having an on-off valve 16. Are provided respectively. The transportation pipe connecting end 15 and the suction pipe 9 are connected by a collection pipe 20 having a collection cutoff valve 18 and an in-line strainer 19.

Next, the operation of the concrete pump transportation pipe cleaning device configured as described above will be described.

When the pumping of concrete is finished, conventional proximal end 33 _a of the same transport pipe 33 disconnects from the concrete pump, the mounting stuffing tube 35 in which the padding 34 therein, the other end 35 _a of the stuffing tube 35 Transport pipe connection end 15 of water supply device A
Connect. Then, the three-way switching valve 10 is connected to the water tank 1, the opening / closing valve 14 of the transport pipe connecting end 15 is opened, and the car wash nozzle 1 is connected.
The on-off valve 16 and the collection shutoff valve 18 of 7 are closed, and the water pump 2 is operated by the actuator _2a . Then, the water in the water tank 1 moves as the piston 4 moves, and the three-way switching valve 1
0, suction pipe 9, check valve 5,6, cylinder 3, check valve 7,8,
It is fed into the stuffing pipe 35 through the pressure feeding pipe 12, the on-off valve 14, and the transportation pipe connecting end 15, and the filling 34 is pushed from the stuffing pipe 35 to the transportation pipe 33 to remove the residual fresh concrete in the transportation pipe 33. extruded from the other end 33 _b of the punching設現field side is removed.

In the above, the water in the water tank 1 was used as the water source, but when an external water source is used, the three-way switching valve 1
0 may be switched to the external water source pipe 11.

Next, when water in the transportation pipe 33 is collected and used for car washing or the like, the three-way switching valve 10 is switched to the closed side, the opening / closing valve 14 of the transportation pipe connecting end 15 is closed, and the opening / closing near the car washing nozzle 17 is performed. The valve 16 and the collection cutoff valve 18 are opened, and the water pump 2 is operated again. The water inside the transport pipe 33 passes through the packing pipe 35 and the transport pipe connecting end 15, flows into the recovery pipe 20, and is filtered by the in-line strainer 19 to remove dust,
It is fed from the suction pipe 9 to the car wash nozzle 17 through the check valves 5 and 6, the cylinder 3, the check valves 7 and 8, the cleaning pipe 16 _a , and the opening / closing valve 16.

In this case, it is necessary to process the base end 33 _a according to the tilted state of the transport pipe 33. That is, the transport pipe 3
When the 3 other end 33 _b is inclined such that the above base end 33 _a, since water is also removed padding 34 is never leaked from the other end 33 _b, and remove the stuffing 34 water pump The load of 2 can be reduced. On the other hand, when the transport pipe 33 is horizontal or inclined so that the other end 33 _b is lower than the base end 33 _a , the water inside will flow out when the stuffing 34 is removed. However, the load is increased, and collection is performed with the padding 34 still attached. Therefore, if possible, it is preferable to perform the recovery with the other end 33b _facing up.

[Advantage of the Invention] As described in detail above, the present invention is provided with a water tank and a water pump for sucking the water in the water tank through the suction pipe and feeding the water to the concrete transportation pipe through the pressure feeding pipe. Between the transport pipe and the suction pipe, a recovery pipe for sucking the water in the transport pipe from the water pump and sending it back is provided, and a cleaning pipe is connected to the pressure feed pipe. Therefore, by forcibly collecting the water used for cleaning the transport pipe with the water pump, the water of a small water source can be effectively used for cleaning the vehicle and the like. Further, since the water is forcibly sucked, it has an excellent effect that the concrete pump truck can be installed at a higher place than the transport pipe.

[Brief description of drawings]

FIG. 1 is a view of a part of a water supply device according to an embodiment of the present invention, FIG. 2 is a view of a conventional water supply device, and FIGS. 3 and 4 are views showing a method for removing residual concrete in a transportation pipe. Is. 1 ...... water tank, 2 ...... water pump, 9 ...... suction pipe, 12 ...... pumping pipe, 16 _a ...... washing pipe, 20 ...... recovery pipe, 33 ...... transport tube.

Claims (1)

[Scope of utility model registration request] 1. A water tank comprising: a water tank; and a water pump for sucking water from the water tank through a suction pipe and feeding the water to a concrete transportation pipe through a pressure feeding pipe. Is provided with a recovery pipe for sucking the water in the transport pipe by the water pump and sending it back, and a cleaning pipe is connected to the pressure feed pipe. Cleaning device.