JP2008150915A - Chemical injector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical injector for easily improving the ground, when jacking a pipe in the soft ground by a double tube drilling advancing method. <P>SOLUTION: This chemical injector is provided with an installation base 11 arranged in a shaft 30, a slider device 12 slidingly mounted on the installation base and advancing/retreating by a jack, a stand base 21 detachably fixed to the installation base, a slide guide 24 arranged on the stand base and extending in the slide direction of the slider device, chuck devices 25 and 26 slidingly supported by the slide guide, gripping a chemical injection pipe 27, advanced by the slider device and horizontally pushing the chemical injection pipe in earth, and a chemical introducing part 28 introducing a chemical into the chemical injection pipe. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drug injection device, and more particularly to a device that can smoothly inject a coagulant into a soft ground when propelling a pipe by a double pipe cutting method.

  Recently, when pipes such as water and sewage pipes are laid in the ground, a pipe propulsion method in which the pipe is pushed and laid in the ground has been increasingly adopted. There are various methods for this pipe propulsion method, and when laying a small-diameter pipe, a double pipe cutting method is often employed (Patent Documents 1 and 2).

  The double-pipe cutting type pipe propulsion device basically consists of a slide base, propulsion unit body, propulsion jack, casing rod (inner pipe) and propulsion pipe (steel pipe). The propulsion unit body slides on the slide base. The propulsion jack is provided and a propulsion jack is provided, and the propulsion device main body is advanced by the propulsion jack.

  In addition, the base of the propulsion pipe is fitted into the pusher of the propulsion unit, and a casing rod is rotatably incorporated in the propulsion pipe. The base of the casing rod is attached to the spindle rod of the propulsion unit, and the spindle rod is driven by a drive motor. It is driven to rotate the casing rod, excavating the front by a cutting bit at the tip of the casing rod, taking the excavated earth and sand into the casing rod, and discharging it to the rear.

  When propulsion of the propulsion pipe is completed, the casing rod is pulled out, a vinyl chloride pipe, etc. is set in the propulsion pipe, and a filling work is inserted between the propulsion pipe and the vinyl chloride pipe, etc. Can be laid.

  The above-mentioned double-pipe cutting method has a wide range of applicable soil types, from ordinary soil to cobblestones, mixed rocks, and bedrock, and can directly reach existing manholes and existing shield tunnels. Therefore, it has characteristics such as less water leakage.

  However, when the pipe is propelled in soft ground such as sand, the earth and sand around the propulsion pipe is greatly collapsed and taken into the casing rod, and there is a concern that the road will collapse.

  On the other hand, improving the ground by injecting a coagulant into the soft ground is performed (Patent Document 3 and Patent Document 4).

JP 2006-219920 A JP 2003-239865 A Japanese Patent No. 3124065 Japanese Patent Publication No.57-30959

  However, the conventional double-pipe cutting-type tube propulsion device has a problem that there is no device suitable for injecting a chemical such as a coagulant into the ground, and the ground improvement is very troublesome.

  In view of this point, an object of the present invention is to provide a drug injection device that can easily improve the ground when the tube is propelled to the soft ground by the double tube cutting method.

  Therefore, a drug injection device according to the present invention is a drug injection device that injects a drug horizontally into the ground, and a drug injection tube for injecting the drug into the ground, and an installation base installed in the shaft A slider device that is slidably mounted on the installation base and is advanced / retracted by a jack, a gantry base that is detachably fixed to the front of the slider device of the installation base, and the gantry base provided on the gantry base, A slide guide extending in the sliding direction of the slider device, and the drug injection tube that is slidably supported by the slide guide and extends horizontally, and is advanced by the slider device, whereby the drug injection tube is horizontally placed in the soil. A chuck device that pushes into the medicine injection section, and a medicine introduction section that introduces the medicine fed under pressure into the medicine injection tube. That.

  One of the features of the present invention is that an installation base is installed in a shaft, a slider device and a chuck device are slidably mounted on the installation base, a drug injection tube is gripped by the chuck device, and the chuck device is advanced by the slider device. The drug injection tube is pushed into the ground, the drug is introduced from the drug introduction part into the drug injection tube, and the drug can be injected into the ground. Thereby, since a chemical | medical agent can be inject | poured into a ground horizontally, ground improvement can be performed easily.

  Among the structures of the drug injection device, the installation base and the slider device can be configured by using the slide base and the propulsion unit body in the double-pipe cutting type pipe propulsion device. In that case, after the chemical injection device is installed in the shaft and the chemical is injected, the gantry base and the chuck device are removed, and the casing rod and the propelling tube are set to perform the propulsion operation of the tube.

  The base is not particularly limited as long as the base can be fixed to the installation base and the slide guide can be provided, and a plate-like base can be adopted as shown in the following embodiment.

  The slide guide only needs to be able to slidably support the chuck device, may be formed in a concave groove into which a wheel of the chuck device is fitted, or may be a guide rail system in which a guide roller of the chuck device slides.

  The chuck device may be any mechanism as long as it can grip the drug injection tube. For example, a general mechanism that holds the drug injection tube by advancing a plurality of chuck claws can be employed.

  The structure is not particularly limited as long as the medicine introduction part can introduce the medicine that has been fed into the medicine injection pipe. For example, as shown in the following embodiment, the fitting part into which the rear end of the medicine injection pipe fits And an introduction part for introducing a drug into the drug injection tube. In this case, the chuck mechanism grips the middle of the drug injection tube.

  The slide base, the propulsion unit main body, the propulsion jack and the propulsion pipe in the double-pipe cutting type pipe propulsion device are the same as those of a conventionally known propulsion device.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 4 show an example of a double-pipe cutting type pipe propulsion device on which a preferred embodiment of a drug injection device according to the present invention is mounted. In the tube propulsion device 10, a propulsion device main body (slider device) 12 is slidably mounted on a slide base 11 so that the propulsion device main body 12 is advanced and retreated on the slide base (installation base) 11 by a propulsion jack. It has become.

  The propulsion unit body 12 is provided with a drive motor 13 and a spindle rod (not shown). A gear transmission mechanism is provided between the spindle rod and the drive motor 13. The spindle rod The base part of the casing rod 14 is attached to.

  Further, a pusher 15 is attached to the propulsion unit main body 12, and a base portion of the propulsion pipe 16 is fitted into the pusher 15. A casing rod 14 is rotatably incorporated in the propelling pipe 16, and a roller bearing (not shown) extending in the circumferential direction is interposed between the two so as to ensure smooth rotation and straightness of the casing rod 14. It is supposed to be.

  A cutting bit 17 is attached to the distal end of the casing rod 14, and a plurality of cutting blades 17 </ b> A are attached to the distal end surface of the cutting bit 17 at predetermined equal angular intervals in the circumferential direction.

  In the tube propulsion apparatus 10 having the above-described configuration, a base plate (mounting base) 21 is mounted between both side portions 11A of the slide base 11, and the base plate 21 is attached to both side portions 11A of the slide base 11 by bolts 22 and brackets 23. It is fixed so that it can be hugged and removed.

  On the base plate 21, left and right guide rails (slide guides) 24 are extended and fixed in the front-rear direction. A carriage 25 is slidably supported on the guide rail 24, and a chuck mechanism 26 is mounted on the carriage 25. The chuck mechanism 26 is configured to be able to grip and release the middle of the drug injection tube 27 by the drive motor 26A, and the cart 25 and the chuck mechanism 26 constitute a chuck device.

  The carriage 25 is connected by a connecting portion 12A of the propulsion device body 12 and a rod 29, and is advanced and retracted by a propulsion jack. Further, the propelling machine body 12 is provided with a drug introduction pipe (drug introduction part) 28, and a receiving part 28 </ b> A for receiving the rear end of the drug injection pipe 27 is formed at the tip of the drug introduction pipe 28. The medicine pumped from the outside is introduced into the medicine injection tube 27 and injected into the ground in front, and the medicine injection apparatus 20 is configured as described above.

  When propelling the propulsion tube 16, when improving the ground, for example, soft ground, the drug injection device 20 is set on the slide base 11 of the tube propulsion device 10. That is, the base plate 21 on which the chuck mechanism 26 and the carriage 25 are mounted is mounted on the slide base 11, and the base plate 21 is fixed to the both side portions 11 </ b> A of the slide base 11 by the bolts 22 and the brackets 23.

  Next, this pipe propulsion apparatus 10 is lowered into the shaft 30, installed in the direction in which the pipe should be propelled, and fixed so as not to move. Thereafter, the drug injection tube 27 is passed through the chuck mechanism 26, the rear end of the drug injection tube 27 is brought into contact with the receiving portion 28A of the drug introduction pipe 28, and the chuck mechanism 26 is operated by the drive motor 26A so that the drug injection tube 27 is Hold it.

  When the propulsion device main body 12 is moved forward by the propulsion jack when the preparation is completed in this way, the carriage 25 moves forward and pushes the drug injection tube 27 into the front ground. When the carriage 25 advances by a predetermined distance, the gripping by the chuck mechanism 26 is released, the carriage 25 is retracted, the next medicine injection pipe 27 is lowered into the shaft 30, the chuck mechanism 26 is passed, and the rear end is a medicine introduction pipe. 28, the tip is connected to the rear end of the drug injection tube 27 pushed into the ground, the drug injection tube 27 is gripped in this state, and the drug injection tube 27 is processed in the same manner as described above. Push into the ground in front. After such operations are repeated and the drug injection tube 27 is pushed into the ground, a drug, for example, a known coagulant, is introduced into the drug injection tube 27 and injected into the ground to improve the ground.

  When the ground is improved, the cart 25 is moved backward by the propulsion jack while the drug injection tube 27 is held by the chuck mechanism 26, the drug injection tube 27 is extracted, the drug injection device 20 is detached from the slide base 11, and the shaft 30 The casing rod 14 and the propelling pipe 16 can be set on the propulsion unit main body 12 and the propelling pipe 16 can be propelled.

  When there is a distance between the starting shaft 30 and the reaching shaft, the propeller main body 12 is moved backward with the casing rod 14 and the propulsion pipe 16 being left, and the subsequent casing rod 14 and propulsion pipe 16 are set in the propulsion main body 12. And continue to promote in the same way.

  After the propulsion pipe 16 has been propelled, the casing rod 14 is removed from the propulsion pipe 16, the slide base 11 and the propulsion device main body 12 are pulled up from the starting shaft 30, and a vinyl chloride pipe or the like is inserted into the remaining propulsion pipe 16, A double pipe can be laid in the ground.

  In the above example, the drug injection device is configured using a double-pipe cutting type tube propulsion device. However, the drug injection device is configured as a dedicated drug injection device, and when the drug is injected into the ground, it is lifted from the shaft. The pipe propulsion device may be installed in the shaft.

It is a whole schematic perspective view which shows the example of the pipe | tube propulsion apparatus of the double pipe cutting system in which the chemical injection device concerning the present invention is carried. It is a side view which shows preferable embodiment of the said chemical | medical agent injection apparatus. It is a front view which shows the said embodiment. It is a top view which shows the use condition of the said embodiment.

Explanation of symbols

10 Double-pipe cutting-type pipe propulsion device 11 Slide base (installation base)
12 Propeller body (slider device)
14 Casing rod 14
16 Propulsion tube 20 Drug injection device 21 Base plate (base)
24 guide rail (slide guide)
25 cart (chuck device)
26 Chuck mechanism (chuck device)
27 Drug injection pipe 28 Drug introduction pipe 28A Receiving part 30 Vertical shaft

Claims (3)

A drug injection device configured to inject a drug horizontally into the ground,
A drug injection tube for injecting the drug into the ground,
An installation base installed in the shaft,
A slider device that is slidably mounted on the installation base and moves forward and backward by a jack;
A gantry base that is detachably fixed in front of the slider device of the installation base; a slide guide that is provided on the gantry base and extends in the sliding direction of the slider device;
A chuck device that is slidably supported by the slide guide, holds the drug injection tube extending horizontally, and is pushed forward by the slider device to push the drug injection tube horizontally into the soil;
A drug introduction part for introducing the pumped drug into the drug injection tube;
A drug injection device comprising: The above-mentioned installation base is a double-pipe drilling type tube propulsion system in which the propulsion pipe is propelled while the casing rod is advanced by the propulsion jack while the casing rod is rotated by the propulsion unit main body and the earth and sand are excavated by the cutting bit at the tip of the casing rod. A slide base that slidably supports the propulsion unit body in the apparatus;
The slider device is the main body of the propulsion device,
The drug injection device according to claim 1, wherein the drug injection device is configured to be mounted on the tube propulsion device in place of the casing rod and the propulsion tube of the tube propulsion device.   The drug injection device according to claim 1, wherein the chuck device grips the middle of the drug injection tube, and the drug introduction portion is provided in the slider device to receive a rear end of the drug injection tube.

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