JPS5837859B2 - mortar spraying equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mortar spraying device.

Generally, a mortar spraying device uses a mortar pump main body to forcefully feed mortar through a transfer pipe to a nozzle, and at the same time supplies a quick-setting agent that is force-fed by air to the nozzle of the transfer pipe.
Since the air is used to inject mortar from the nozzle of the transfer piping, it is difficult to adjust the timing when the mortar starts to be pumped and the quick-setting agent starts to be pumped. Because no air is supplied to the nozzle part, it is blocked by mortar, and if the pumping of the quick-setting agent is started too early, only the quick-setting agent will be injected from the tip of the transfer pipe, which is very uneconomical. There was also the problem of contaminating the surrounding area.

In order to solve the above-mentioned problems, the present invention provides a flow path that can supply only air to the tip of the transfer pipe and a flow path that supplies an quick setting agent to the tip of the transfer pipe using air. The road can be used arbitrarily.

The embodiment will be explained below with reference to the drawings. Reference numeral 1 is a mortar pump, which is composed of a squeezing type pump body 2, a hopper 3, and a transfer pipe 7 provided with a connecting pipe 6 to which a hose 5 having a nozzle 4 at the tip is connected. Thus, the mortar in the hopper 3 can be pumped through the transfer pipe 7 by the pump body 2.

Reference numeral 8 denotes an quick-setting agent supply device, which compresses the quick-setting agent in the quick-setting agent storage container 9 using air from a compressor 10 and supplies it into the connecting pipe 6 of the transfer pipe 7. The container 9 has an opening 12 that can be opened and closed with an opening/closing lid 11.
is provided on the top, and a rotating shaft 1 is rotatably provided in the center.
A lifting device 16 is installed inside the container 9, in which a special top plate 15 is attached to each of the containers 9 via a plurality of arms 14. A screw conveyor 18 is provided which can receive the quick-setting agent lifted up and transfer it to an air chamber IT formed at its tip.

A motor 19 for driving the screw conveyor 18 is mounted outside the container 9, and the air chamber 17 is communicated with the upper part of the container 9 through a communication pipe 20.

Next, the air flow path for supplying the quick-setting agent will be explained with reference to FIGS. 1 and 2. The compressor 10 and the air chamber 1
A first flow path 22 with an on-off valve 21 provided in the middle between 7 and 7 is provided,
A second flow path 23 between the air chamber 17 and the connecting pipe 6 of the transfer pipe 7
A third flow path 24 branched from between the air chamber 17 of the first flow path 22 and the on-off valve 21 is extended at a position 1 close to the connecting pipe 6 of the second flow path 23, and The branched fourth flow path 25 is extended by the communication pipe 201 of the container 9, and
Channel 22, second channel 23, third channel 24, and fourth channel 2
5 is provided with a switching valve 26 that opens and closes each of the channels 2223, 24, and 25 with a single operation.

The switching valve 26 has a valve stem 28 rotatably installed in a valve frame 29, provided with holes 27 that match the flow paths 22, 23, 24, 25, and one end of the valve stem 28. A lever 30 is attached, and the first flow path 22 and the second flow path 23, and the third flow path 24 and the fourth flow path 25 are respectively opened and closed in the same state by the switching valve 26, and the first flow path 22, The second flow path 23, the third flow path 24, and the fourth flow path 25 are always in opposite open and closed states.

Figure 3 shows the motor 1 that drives the screw conveyor 18.
9, a valve 33 is provided in the oil passage 32 between the motor 19 and the hydraulic pump 31, and the valve 33 is connected to the valve rod 2 of the switching valve 26.
When the switching valve 26 opens the first flow path 22 and the second flow path 23, the switch valve 26 is controlled by the limit switch LS, which is turned on and off by the cam 34 attached to the cam 8, and the spring 35. The limit switch LS is turned on at the cam 34, the oil passage 32 is opened, and the motor 19 is operated.
When the first flow path 22 and the second flow path 23 are turned "closed", the limit switch LS is turned "off", and the oil path 32 is "closed" by the spring 35 to stop the motor 19. ing.

The structure of the switching valve is as shown in Figures 4 and 5.
A single switching valve 26' is provided in the flow path 22' and the second flow path 23', and a third flow path 24' and a second flow path branched from the first flow path 22' are provided in the switching valve 26'. A fourth flow path 25' branched from 23' is provided, and when the mortar spraying device is not in use, the valve rod 28' rotatably supported by the valve frame 29' is held at the solid line position in FIG. The passage 22′ and the second passage 23′ are
When in use, the valve stem 28' is rotated to open the first flow path 22' and the second flow path 22' and the second flow path 25' as shown in the dashed line in FIG. Flow path 23' is "open",
Even if the third flow path 24' and the fourth flow path 25' are made to be "closed", similar effects can be obtained. In addition, although the example uses a powdered quick-setting agent,
Even a log-shaped rapid setting agent has the same function and effect as long as it has a structure that allows it to be powdered and supplied in fixed quantities to the air chamber.

The present invention has the above-mentioned structure, and its operation will be explained next. When the mortar spraying device is not used, the switching valve 26 is set to "close" the first flow path 22 and the second flow path 23 as shown in FIG. , the third flow path 24 and the fourth flow path 25 are opened.

Next, when using a mortar spraying device, pump body 2
When the compressor 10 is operated and the on-off valve 21 is set to "open", the air from the compressor 10 is transferred to the third flow because the switching valve 26 is in the state of fil/i: when not in use. It passes through the passage 24 and is injected from the nozzle 4 at the tip of the hose 5 without containing the quick setting agent.

Next, the pump body 2 is operated to force-feed the mortar in the hopper 3, and after confirming that the mortar has reached the tip of the transfer pipe 7, the lever 30 of the switching valve 26 is rotated, and the first flow path 22 is rotated. , the second flow path 23 is opened, the third flow path 24 and the fourth flow path 25 are closed, and the limit switch LS is turned on using the cam 34 to operate the motor 19. The screw conveyor 18 is driven once.

As a result, the quick-setting agent in the container 9 is lifted by the lifting device 16, and the lifted quick-setting agent is received by the screw conveyor 18 and transferred to the air chamber 17 in a substantially constant amount, and the transferred quick-setting agent is transferred to the compressor 10. The air flows through the first flow path 22,
By passing through the second flow path 23, air is mixed into the mortar in the connecting pipe 6, and the mortar mixed with the quick setting agent is injected with air from the nozzle 4 of the hose 5 and sprayed onto the wall surface.

At that time, the air that has passed through the first flow path 22 enters the container 9 from the air chamber 17 through the communication pipe 20, and the air flows through the screw conveyor 18 while keeping the pressure in the container 9 and the air chamber 17 constant. Screw conveyor 1
It holds a fixed quantity transfer of 8.

When the spraying operation is finished (7) or when the quick setting agent in the container 9 is used up, first rotate the lever 30 and close the switching valve 26.
is returned to its original state, thereby limiting the limit switch LS.
is "broken" and the screw conveyor 18 stops, and then the pump body 2 is stopped.The mortar in the transfer pipe 7 at the stop 1 is blocked in the nozzle 4 by the air that has passed through the third flow path 24. The residual air containing dust inside the container 9 is injected without any
It is discharged through the flow path 25 to the spraying site where dust countermeasures have been taken, and the pressure inside the container 9 becomes the same as that of the atmosphere.

Therefore, when the spraying work is finished, the on-off valve 21 is closed and the compressor 10 is stopped, and when the quick-setting agent is to be supplied into the container 9, the on-off lid 11 is opened and it is supplied from the inlet 12. .

As described above, the present invention provides separate passages for guiding only air to the transfer piping and passages for guiding the fast-setting agent, which is pumped by air, to the transfer piping, and by switching the switching valve, the air is removed by the compressor. Since it is now possible to selectively flow air into each flow path, when performing spraying work, it is possible to first force-feed air only, and then optionally force-feed quick-setting agent. It is possible to prevent blockage caused by mortar, and since the quick-setting agent is not injected before the mortar reaches the tip of the transfer pipe, unlike the conventional method, the quick-setting agent is not wasted.
Furthermore, there is no need to take into account the adjustment at the start of pumping of mortar and the start of pumping of quick-setting agent, and the operation becomes extremely simple.

[Brief explanation of the drawing]

Figure 1 is an overall view, Figure 2 is an enlarged view of the quick-setting agent supply device, Figure 3 is a drive system diagram of the quick-setting agent removal device, Figure 4 is another embodiment of the switching valve, and Figure 5 is a and b are the AA cross section and the BB cross section in FIG. 4. 2 is the pump body, 7 is the transfer pipe, 9 is the quick setting agent storage container,
17 is an air chamber, 18 is a screw conveyor, 22 is a first flow path, 23 is a second flow path, 24 is a third flow path, and 26 is a switching valve.

Claims (1)

[Claims] 1 While the mortar pump body forces the mortar through the transfer pipe to the nozzle, the quick-setting agent taken out in a fixed amount from the quick-setting agent container into the air chamber is transferred to the nozzle of the transfer pipe using air from the compressor, and the quick-setting agent is The mortar spraying device is configured to mix mortar into mortar and inject the mortar from a nozzle of a transfer pipe using the air, and a first flow path connecting the compressor and the air chamber, and a first flow path connecting the air chamber and the transfer pipe. A mortar spraying device comprising: a second passage connecting the nozzle of the piping; and a third passage connecting the compressor and the nozzle of the transfer piping; and a switching valve provided on at least the second passage and the third passage. .