JPS5939567B2 - Pharmaceutical injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for injecting a chemical into the ground or behind a lining, such as an anti-friction agent/backfilling material injection device in the propulsion construction method, a backfilling material injection device in the shield construction method, and a soil improvement agent injection device. This relates to equipment, etc.

The propulsion method is a construction method in which a shield pipe is attached to the tip of the pipe to be buried or the pipe to be lined, and the pipe is laid while excavating the ground with the shield pipe. ) It is necessary to inject an anti-friction agent and a backing material into the voids generated on the outside of the pipe to reduce the propulsion resistance of the pipe and prevent ground subsidence.

The conventional method of injecting anti-friction agents and backfilling materials in the propulsion method was as shown schematically in Figure 1.

In FIG. 1, 3A and 3B are liquid A and liquid preparation tanks, respectively.

For each type of 3A and 3B, the required amount (generally, it is done in the amount of the worker's batch).

), water 1, water glass 2, water 1, water 7) 2B and talc 2c are added and stirred to prepare a water glass aqueous solution A solution and a cement talc suspension B solution, respectively.

The A liquid and the B liquid are sent to conveying pipes 5A and 5B by grout pumps 4A and 4B, respectively, and are further mixed together in a Y-shaped pipe 6, and then injected into a cavity 8 through an injection valve 7.

Such conventional construction methods have many problems as follows.

(1) Measurement accuracy is poor, reducing friction reduction and backfilling effects.

(2) It requires a lot of workers.

Furthermore, if a promotion worker is also responsible for the injection work, it is inefficient because the work during the injection work has to be stopped.

(3) The completion of injection is judged by the pressure increase of the grout pump and the injection is stopped, but at this point there is some chemical remaining in the conveying pipe, which is disposed of as loss.

This loss increases as the propulsion distance increases and the conveying pipe becomes longer, resulting in a large loss in material costs.

(4) After completion of injection, cleaning of the transport pipe etc. is likely to be insufficient, often resulting in clogging of the transport pipe.

(5) Since the material storage tank, preparation tank, and grout pump are separated, a large area is required for installation, which is disadvantageous for work in urban areas.

The objects of the present invention are to improve the measurement accuracy of injection material, to obtain the desired anti-friction and backfilling effects, to reduce material loss, to ensure cleaning after injection, and to be carried out with fewer personnel. The purpose of the present invention is to provide an automated material collection and injection device that can perform the following steps.

The lumber injection device according to the present invention is a device that prepares two types of lumber collection liquids, liquid A and liquid B, mixes them in a predetermined ratio, and injects the mixture into the ground or lining layer. This device is characterized in that it is equipped with f.

(a) A liquid A and B liquid preparation tank having measuring and stirring means.

(b) Liquid A and liquid B transport tanks that receive and send out the liquids from the liquid A and liquid B preparation tanks, respectively.

The transfer tank is connected to a vacuum suction means and an air pressurizing means, respectively, and receives the liquid by vacuum suction, and sends out the liquid by being pressurized with air.

(c) A conveyance pipe connected to each of the liquid A and liquid B conveyance tanks, combined at the tip, and then connected to the switching valve.

A liquid flow sensor is inserted in the vicinity of the connection portion of the conveyance pipe with the liquid A and liquid B conveyance tanks, respectively, and a water supply pipe is connected via a water conveyance valve.

(d) A switching valve that is connected to the end of the conveying pipe and sends the incoming fluid to the injection pipe or the wash water wastewater and surplus injection material discharge pipe.

(e) An injection pipe that is connected to the switching valve and injects the lumber collecting liquid into the ground or the lining layer, and a discharge pipe that discharges cleaning waste water.

(4) Automatic control means that commands and controls operations such as collection preparation in the adjustment tank, operation of the transport tank, operation of the switching valve, and water supply in accordance with input signals of various measured values.

Hereinafter, the apparatus of the present invention will be explained based on FIG. 2, which is a process diagram of an injection method using an embodiment of the apparatus of the present invention.

In Fig. 2, 14 is a liquid A preparation tank, 15 is a liquid B preparation tank,
16 is a liquid A transport tank, 17 is a B liquid transport tank, 26 is a transport pipe, 29 is a switching valve, 30 is an injection pipe, 31 is a discharge pipe,
24 is an automatic control panel that controls the operation of each device.

In a preferred embodiment, the device of the present invention comprises a conveying pipe 2
6, the main equipment excluding the switching valve 29, the injection pipe 30, and the discharge pipe 31, that is, the equipment surrounded by broken lines in FIG.
25.

] is compactly stored on a single stand, making it convenient to operate and transport.

The device of the present invention also includes a water pump 9 that sucks water from a water storage tank 34 outside the device and sends the water to the liquid preparation tank 14, 15, etc.
, by suctioning water glass from the water glass storage tank 35 outside the device.
A water glass pump 10, a talc hopper 11, and a cement hopper 12 are attached to the liquid preparation tank 14.

Water and water glass are weighed and fed into the liquid A preparation tank 14 and stirred to prepare liquid A, which is a water glass aqueous solution having a predetermined concentration and amount.

Similarly, water, talc, and cement each have their own hoppers.
From 12, via screw conveyors 13 and 13, it is measured and sent to the B liquid preparation tank 15, where B liquid of talc and cement suspension with a predetermined concentration and amount is prepared.

Materials such as water, water glass, Merck, and cement are automatically and accurately measured using an electric metering (load cell) method.

When the liquid preparation in the preparation tanks 14 and 15 is completed, the vacuum suction means 18 connected to the transfer tanks 16 and 17 is activated, the air in the tanks 16 and 17 is removed, and the liquid in the preparation tanks 14 and 15 is removed. is fed into the transport tanks 16 and 17.

When the liquid has been fed into the transport tanks 16 and 17, the operation of the vacuum suction means 18 is stopped, and the tank 16.
Connection valve 2 with air pressurizing means 19 connected to 7
0 is opened and the liquid in the transfer tanks 16 and 17 is pressurized.

Although the connecting pipes between the transport tanks 16 and 17, the preparation tanks 14 and 15, and the vacuum suction means 18 are not shown, they are of course closed by valves or the like.

Each of the transfer tanks 16,17 has its branch pipe 26.
A, 26B are connected to the branch pipe 26A.

26B are combined at the tip with a Y-shaped tube 26C to form a confluence tube 26D, branch tubes 26A, 26B, and a Y-shaped tube 26C.
The conveying pipe 26 is composed of one merging pipe 26D.

The pressurized liquid in the transport tanks 16 and 17 enters the branch pipes 26Aj26B of the transport pipe 26, joins at the Y-shaped pipe 26C,
The mixture becomes turbulent in the confluence pipe 26D and reaches the switching valve 29.

Since the switching valve 29 is open to the injection pipe 30 side, the liquid is injected into the cavity 33 through the injection pipe 30.

Liquid flow sensors 21 and 21 are inserted near the connection portions of the transport pipe 26 and the transport tanks 16 and 17, respectively.

An example of the liquid flow sensor 21 is a sensor consisting of two electrodes exposed within the transport tube 26 and held by an insulator.

In such a sensor, the resistance between the electrodes differs between when fluid is flowing and when fluid is not flowing.

Water conveying valves 23 and 23 are installed in the conveying pipe 26 following the sensors 21 and 210, that is, on the downstream side of the sensors, respectively.
A water supply pipe 22 connected to the water pump 9 is connected via the water pump 9 .

When the liquid flow sensors 21, 21 detect that the liquid has been sent from the transfer tanks 16, 17, the connection valve 20 with the pressurizing means is closed, the water transfer valves 23, 23 are opened, and the water pump is closed. 9 is activated and water is supplied through the water supply pipe 22.

Therefore, the liquid in the conveying pipe 26 is no longer sent out by pressurized air, but is pushed by the water from the water supply pipe 22 and subsequently injected into the cavity 33.

When the injection of the planned injection amount is completed, the switching valve 29 closes the discharge pipe 3.
1 side, the water conveying valve 23.23 is closed, the pressurized connection valve 20 is opened and pressurized air is introduced into the conveying pipe 26,
The water in the transport pipe 26 not only pushes the injection liquid, but also cleans the inside of the transport pipe 26 and is discharged from the discharge pipe 31 into the shaft.

The operation of each of the above devices is automatically controlled.

24 is an automatic control panel.

The automatic control panel 24 displays materials, printed material weight values, process displays, etc., allows setting values to be input, and also allows partial or complete manual switching.

That is, if you press the work start button after inputting the required set values, you can input raw materials, prepare liquids A and B, transfer the liquid to the transfer tank, inject the liquid, push the liquid with water, drain the cleaning water, etc. is done automatically.

Setting of the switching time of each of these steps is mainly performed by a timer in addition to detection by the liquid flow sensor 21.

That is, for example, a transport time corresponding to the length of the transport pipe 26 is measured in advance, and a timer is set based on the measured time.

In some cases, it may be better to use manual methods for adding raw materials to the liquid preparation tanks 14 and 15 and preparing the liquid.

Next, embodiments of the apparatus of the present invention are shown in FIGS. 3, 4 and 5.

The equipment shown in Figures 3-5 is the same type of equipment as used in the process diagram of Figure 2.

Therefore, the same symbols as in FIG. 2 indicate the same equipment.

19A and 19B are an air compressor and a receiver tank of the air pressurizing means 19.

The description of FIGS. 3 to 5 overlaps with the description of FIG. 2, so it will be omitted.

As a precaution, piping, generally flexible pressure-resistant hoses, would be used in Figures 3 to 5 to provide lightning protection, but piping is not shown.

In addition, at the bottom of the A liquid and B liquid preparation tanks 16 and 17, there are liquid flow sensors 21, 21, water conveying valves 23, 23, and water supply pipes 2.
2. The conveying pipe 26 to which the switching valve 29 and the like are attached is attached.

Above, one embodiment of the device of the present invention was described in which the device of the present invention is used for injecting anti-friction agent and backfilling material in the propulsion method. By changing it, it can be similarly used for soil improvement agent injection.

Since the apparatus of the present invention is constructed and used as described above, many effects such as those described below can be obtained.

(1) It has high measurement accuracy and can improve the friction reduction effect and backfilling effect.

(2) The number of workers can be reduced.

Injection work that previously required at least four people can now be performed by one person.

(3) Since the injection work can be carried out without any hindrance to the propulsion work, the propulsion construction time can be shortened.

(4) - There is less loss of medicine and cleaning after injection is reliably performed.

(5) Since the main equipment of the device is compactly housed on one stand, it is convenient to operate and transport, and there is no problem in working in urban areas.

[Brief explanation of the drawing]

Fig. 1 is a process diagram of the injection method of antifriction agent and backfilling material in the conventional propulsion method, and Fig. 2 is a process diagram of the injection method of antifriction agent and backfilling material in the propulsion method using the device of one embodiment of the present invention. The process diagrams of the construction method, FIGS. 3, 4, and 5 are a front view, a side view, and a plan view of an apparatus according to an embodiment of the present invention. In the drawing, 14 is a liquid A preparation tank, 15 is a liquid B preparation tank,
16 is a liquid A transport tank, 17 is a B liquid transport tank, 21 is a liquid flow sensor, 26 is a transport pipe, 30 is an injection pipe, and 31 is a discharge pipe.

Claims (1)

[Scope of Claims] An apparatus for preparing 12 types of straw material liquids, liquid A and liquid B, mixing them in a predetermined ratio, and injecting the mixture into the ground or behind the lining, comprising: a) A having a measuring and stirring means; liquid and B liquid preparation tanks, b liquid A and liquid transport tanks that receive and deliver the liquids of the liquid A and liquid B preparation tanks, respectively; the transport tanks are connected to vacuum suction means and air pressurization means, respectively, and It receives liquid by suction and sends out liquid by pressurizing air, and is connected to both of the liquid A and liquid B transport tanks, combined at the tip, and then connected to the switching valve. A liquid flow sensor is inserted in each of the transport pipes, near the connection portions of the transport pipes with the liquid A and liquid B transport tanks, and then connected to a water supply pipe via a water transport valve, d A switching valve that is connected to the end of the conveying pipe and sends the incoming fluid to the injection pipe or washing water and surplus injection material discharge pipe; An injection pipe for injecting water and a discharge pipe for discharging cleaning waste water, and f) Operations such as leaf material preparation in the preparation tank, transport tank operation, switching valve operation, and water supply according to input signals of various measured values. A straw material injection device characterized by comprising automatic control means for command control. 2. In the straw material injection device according to claim 1, the liquid A is a water glass aqueous solution, the liquid B is a cement-talc suspension, and the injection point of the straw material liquid is generated by the propulsion of a shield pipe. A device for injecting anti-friction agent backfilling material in the propulsion method, which is the outer cavity.