JPH0434954Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a pressure pipe cleaning device that removes concrete remaining in the concrete pressure pipe connected to a concrete pump truck after the pumping operation. In particular, the present invention relates to a cleaning device that uses compressed air when removing the concrete mentioned above.

"Prior Art" Generally, when placing concrete using a concrete pump truck, the concrete pump truck and the pouring site are connected through a pressure pipe, and the concrete is poured through the pressure pipe. They are being sent one by one to the construction site.

On the other hand, in the installation work using the pressure-fed pipe mentioned above,
At the end of the concrete pumping work, concrete remains in the pumping pipe, so
This remaining concrete must be removed.

Conventionally, after the above-mentioned pressure-feeding work is completed, the pressure-feeding pipe is removed from the concrete pump, and high-pressure water or high-pressure air is pumped into the pipe to push out the concrete remaining inside through the filling to the pouring site. A removal operation called water cleaning or air cleaning is being carried out.

``Problems to be solved by the invention'' By the way, among the remaining concrete removal operations mentioned above, the former type of water cleaning is effective when the pressure pipe is long, and the latter air cleaning is effective when the pressure pipe is short. Conventionally, concrete pump trucks are often equipped with two systems of cleaning equipment in order to perform these operations selectively, as appropriate.

However, when equipped with two systems of cleaning equipment in this way, both a water pump and an air compressor are installed, which not only increases the cost of the concrete pump truck but also increases its weight. This may cause problems.

This invention can effectively utilize the air compressor, main container, and piping of the air brake device equipped on the concrete pump truck, reducing the cost of the concrete pump truck and suppressing the increase in weight. The purpose of the present invention is to provide a pressure pipe cleaning device for concrete pump vehicles.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a method for removing concrete remaining in the concrete pumping pipe connected to the concrete pump truck after the pumping operation. The pressure feeding pipe cleaning device is a pipe that connects the air compressor of the air brake device installed in the concrete pump vehicle to the main container, and a branch pipe is connected to the main container, and the tip of the branch pipe is connected to the main container. A connecting member to which the pressure feeding pipe is connected is attached to the branch pipe, and a sub-container for storing compressed air sent out from the air compressor is provided in the middle of the branch pipe, and a connection member is provided between the pipe of the branch pipe and the sub-container. A pressure control means for controlling the pressure of the compressed air supplied to the sub-container, and a check valve that allows the flow of the compressed air supplied to the sub-container to be free and stops the reverse flow are provided in the branch pipe. An on-off valve was provided on the upstream side and the downstream side of the sub-container, respectively.

"Operation" The concrete pump vehicle pressure pipe cleaning device according to the present invention has the above-described configuration, and uses a part of the compressed air used for the air brake device of the concrete pump vehicle for air cleaning. The air compressor for generating compressed air is also used as the air brake device, and the high pressure of the compressed air used in the air brake device is used to store the compressed air necessary for cleaning. By reducing the capacity of the container,
This makes it possible to downsize the device.

"Embodiment" An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 in FIG. 1 indicates an air brake device for a concrete pump vehicle to which this embodiment is applied;
Further, reference numeral 2 indicates a pressure feed pipe cleaning device according to this embodiment.

The air brake device 1 includes an air compressor 3
, a main air storage container (hereinafter referred to as the main container) 4 connected to the air compressor 3, and two sets of brakes provided corresponding to each front wheel 5 and rear wheel 6 of the concrete pump vehicle. Relay valves 9, 10 are provided between the chambers 7, 8 and the main container 4 and adjust the pressure of compressed air supplied to each brake chamber 7, 8. , a brake valve 11 that is connected to both relay valves 9 and 10 to control their operation, and a pipe 12 that connects these, and there is a pipe between the air compressor 3 and the main container 4. , the pressure feeding pipe cleaning device 2 is connected thereto.

This pressure feed pipe cleaning device 2 includes a branch pipe 13 connected in the middle of a pipe 12 connecting the air compressor 3 and the main container 4, and a branch pipe 13 connected to the pipe 12 of the branch pipe 13.
A sequence valve pressure control means 14 provided on the downstream side of the connection part with the sequence valve 1
A check valve 15 provided on the downstream side of 4;
An air storage container (hereinafter abbreviated as sub-container) 16 provided downstream of this check valve 15
, a connecting member 17 that is attached to the end of the branch pipe 13 and to which the pressure pipe P for pumping concrete is connected, the check valve 15 and the sub-container 16.
and an on-off valve 18 provided between the sub-container 16 and the connecting member 17;
8 and a vent valve 19 provided between the connecting member 17.

The sequence valve 14 is configured to control the pressure of the compressed air supplied to the sub-container 16 so that it is equal to or slightly lower than that of the compressed air used in the air brake device 1. ing.

Also, as is clear from the figure, the check valve 15 allows the flow of compressed air supplied to the sub-container 16 to be free and stops the opposite flow.

The connecting member 17 also has a flange 17a.
is provided integrally with the flange 17a, and the pressure feed pipe P is removably connected to this flange 17a with a bolt (not shown) or the like.

On the other hand, the capacity of the sub-container 16 is determined by the pressure of the compressed air used in the air brake device 1, the length of the pressure feed pipe P to be cleaned, and the like.

To give an example, if the pressure of the compressed air used in the air brake device 1 is 7 atmospheres, and the pressure feed pipe P is 5 B x 100 m in name and length, the capacity of the sub-container 16 is: It is set to around 200.

However, in the concrete pump vehicle pressure pipe cleaning device 2 of the present embodiment configured as described above, compressed air is pumped into the sub-container 16 by the air compressor 3 during the concrete pumping work by the pressure pipe P. A predetermined amount of compressed air is stored in the sub-container 16, and the compressed air stored in the sub-container 16 is used to clean the air in the pressure feeding pipe P.

The details of this work are as follows.

First, after completing the concrete pressure-feeding work, the pressure-feeding pipe P is removed from the concrete pump (not shown), and a filler M for extrusion is inserted into the pressure-feeding pipe P from its end, as shown in Figure 1. insert.

After the pressure feed pipe P is attached to the connecting member 17 of the pressure feed pipe cleaning device 2, the on-off valve 18 is opened to send compressed air stored in the sub-container 16 into the pressure feed pipe P.

By supplying compressed air in this manner, the filling M is pressed and moved toward the other end of the pressure feeding pipe P, and the filling M also moves the concrete remaining in the pressure feeding pipe P to other ends of the pressure feeding pipe P. It is pushed out sequentially from the end to the pouring site.

Then, by continuing to supply compressed air into the pressure feeding pipe P described above and pushing out the filling M from the other end of the pressure feeding pipe P, all of the concrete remaining in the pressure feeding pipe P is pushed out. , pressure feed pipe P
Complete cleaning inside.

Note that if the compressed air in the sub-container 16 is insufficient, the compressed air in the main container 4 is used.

In this way, the pressure pipe cleaning device 2 according to the present embodiment uses a part of the compressed air used in the air brake device 1 installed in the concrete pump vehicle to clean the compression pipe P. When equipping the pump vehicle, sub-container 16
This can be implemented simply by adding a branch pipe 13 for connecting the secondary container 16 and the air brake device 1.

Furthermore, since the pressure of the compressed air used in the air brake device 1 is as high as about 7 atmospheres, it is possible to reduce the size of the sub-container 16 accordingly.

Therefore, an increase in cost and weight of the concrete pump vehicle due to the provision of the pressure pipe cleaning device 2 is suppressed, and this is also advantageous when installed together with a water cleaning device.

Note that the constituent members shown in the above embodiments are merely examples, and can be variously modified based on the type of concrete pump truck to be applied, design requirements, etc.

"Effect of the invention" As explained above, the concrete pump truck pressure pipe cleaning device according to the present invention removes the concrete remaining in the concrete pressure pipe connected to the concrete pump vehicle after the pumping operation. In the pressurized pipe cleaning device, a branch pipe is connected to a pipe connecting an air compressor of an air brake device installed in the concrete pump vehicle to a main container, and the branch pipe is connected to the pipe connected to the main container. A connecting member to which the pressure feeding pipe is connected is attached to the tip of the branch pipe, and a sub-container for storing the compressed air sent out from the air compressor is provided in the middle of the branch pipe, and the pipe of the branch pipe and the sub-container are connected to each other. A pressure control means for controlling the pressure of the compressed air supplied to the sub-container and a check valve that allows the flow of the compressed air supplied to the sub-container to be free and stops the reverse flow are provided between the two. Since the on-off valves are provided on the upstream and downstream sides of the sub-container in the pipe, the following excellent effects can be achieved.

Part of the compressed air used in the air brake equipment installed on concrete pump vehicles is used to clean the compression pipes.
When equipping a concrete pump vehicle with a cleaning device, there is no need to provide a dedicated compressed air supply source, and it can be implemented simply by adding an air storage container or branch pipe.

Since the high-pressure compressed air used in the air brake device is used, and the compressed air from the main container can also be used, the capacity of the sub-container can be made as small as possible.

The synergistic effect described above suppresses the increase in cost and weight of the concrete pump truck due to the provision of the cleaning device, and also facilitates installation in parallel with the water cleaning device.

If it suddenly becomes necessary to perform cleaning work after the previous cleaning has been completed and the on-off valves on the upstream and downstream sides of the sub-container are closed, immediately open the on-off valves on the upstream side and turn off the air compressor. In this case, the compressed air in the main container can be used together with the compressed air from the air compressor, so the compressed air at a predetermined amount and pressure can be quickly delivered. can be placed in a sub-container for quick cleaning operations. Further, normally, by keeping the on-off valve on the upstream side closed, the air brake device will not be adversely affected.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a compressed air supply path showing an embodiment of the present invention. 1... Air brake device, 2... Forced pipe cleaning device, 3... Air compressor, 12... Piping, 13...
...Branch pipe, 16...Sub-container (air storage container),
17... Connection member, 17a... Flange, P...
Pressure feeding tube, M...filling.

Claims (1)

[Scope of utility model registration request] A pressure pipe cleaning device that removes concrete remaining in a pressure pipe P for pumping concrete connected to a concrete pump vehicle after pressure pumping work, and an air brake device 1 equipped on the concrete pump vehicle. The air compressor 3 is connected to the pipe 12 connected to the main container 4.
A branch pipe 13 is connected to the branch pipe 13.
A connecting member 1 to which the pressure feeding pipe P is connected to the tip of the
7 is attached, and a sub-container 16 is provided in the middle of the branch pipe 13 to store the compressed air sent out from the air compressor 3. A pressure control means 14 for controlling the pressure of compressed air supplied to the sub-container 16 and a check valve 15 for freeing the flow of compressed air supplied to the sub-container 16 and stopping the reverse flow are provided. Said sub-container 1 of
6. A pressurized pipe cleaning device for a concrete pump vehicle, characterized in that on-off valves 18 are provided on the upstream and downstream sides of the pump.