JPH064135U - Compound injection device - Google Patents

Abstract

(57) [Summary] [Object] To provide a composite injection device capable of simply achieving the purpose of the composite injection in terms of device and operation. [Structure and Effect] The composite injection device of the present invention comprises a shaft cylinder having four liquid passages extending in the vertical direction, and a swivel rotatably fitted to the base of the shaft cylinder. Then, the shaft cylinder portion is provided with upper and lower two-stage chemical liquid discharge ports on the outer peripheral surface of the tip portion, and drilled water discharge ports on the tip surface,
On the other hand, the swivel is provided with four inlets, and the base ends of the above-mentioned four liquid passages are individually communicated with the four inlets of the swivel, while the tip end side has two of the four inlets. One is left in the upper discharge port and one is left in the lower discharge port.
The books are in communication with the discharge ports on the lower end surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a composite injection device applied to a so-called composite injection ground improvement method, in which first a primary injection of a quick-setting drug solution is performed, and then a secondary injection of a slow-setting drug solution is performed.

[0002]

[Prior art and its problems]

 Conventionally, various structures have been proposed as devices applied to the ground improvement method of the composite injection method, but for example, the method of switching the discharge by using the flow velocity and pressure of the chemical solution is more reliable. In addition, it is necessary to install a complicated device in a narrow pipe, which is inevitably chipped, and inevitably causes many failures.In the system using balls, it is necessary to stop the liquid supply once and put the balls in the pipe, which is troublesome. There was a problem that the discharge port could not be opened again. Further, according to the composite injection device by the double pipe rod method proposed by the present applicant (Japanese Utility Model Publication No. 3630/1990), the problems of the above-mentioned conventional device can be eliminated, but in order to switch the discharge port, driving The device had to be operated to drive the inner pipe of the inner and outer pipes, which was still unsatisfactory in terms of the equipment and operation.

The present invention has been made for the purpose of eliminating such conventional problems.

[0004]

[Means for solving problems]

 The present invention comprises a shaft cylinder portion having four liquid passages extending in the vertical direction, and a swivel rotatably fitted to a base portion of the shaft cylinder portion. Discharge ports for chemicals are provided on the outer peripheral surface of the tip part in two steps, upper and lower, and holes for drilling water are provided on the tip surface, while four inlets are provided on the swivel, and the above four liquid passages are provided. The proximal end of the channel is individually connected to the individual inlets of the swivel, while the distal end has two of the four at the upper outlet and one of the remaining two at the lower outlet. Further, the present invention relates to a composite injection device characterized in that the remaining one is communicated with the discharge port on the lower end surface, respectively.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the device of the present invention comprises a shaft cylinder portion 1 and a swivel 25 rotatably fitted to the base of the shaft cylinder portion 1.

The shaft tube portion 1 is composed of a front end member 1A, an intermediate member 1B and a base end member 1C so that the shaft tubular portion 1 can be appropriately added, and a plurality of intermediate members 1B are prepared.

The tip member 1A has an outer tube 2 having upper and lower discharge ports 2a, 2b on the outer peripheral surface, and a plug body 3 fitted and fixed in the outer tube 2 and having a discharge port 3a on the tip surface. And a bit 4 is provided at the tip of the outer tube 2. A plurality of upper discharge ports 2a and lower discharge ports 2b may be provided for each stage as shown in FIG.

The stopper 3 has four longitudinal liquid passages 5a, 5b, 5c and 5d extending in the longitudinal direction, and two liquid passages 5a, 5b out of the four liquid passages 5a, 5b have an annular groove 6a. One of the remaining two liquid passages 5c goes to the lower discharge port 2b via the annular groove 6b, and the last remaining one liquid passage 5d goes directly to the tip discharge port 3a. , They are in communication with each other. The liquid passages 5a, 5b, 5c may be provided with a check valve.

The base end sides of the four liquid passages 5 a, 5 b, 5 c and 5 d open to the base end face of the plug body 3, and a receiving port 7 is formed for each opening.

At the base end of the outer tube 2, a screw portion 8 is formed for screwing connection with the intermediate member 1B.

The intermediate member 1B is composed of an outer tube 9 and a set of four inner tubes 10a, 10b, 10c and 10d (see FIG. 3) that are inserted and supported in the outer tube 9 for forming liquid passages. The outer tube 9 has a threaded portion 11 screwed to the threaded portion 8 of the distal end member 1A on the proximal end side, and is threadedly connected to another intermediate member 1B or the proximal end member 1C on the proximal end side. Each of the threaded portions 12 is formed.

The inner pipes 10a, 10b, 10c, and 10d are connected and integrated at two positions above and below via a connecting member 13 so as to have the same plane arrangement as that of the four receiving ports 7 opening at the base end face of the end member 1A. A receiving port 14 having the same size as the receiving port 7 is formed on the base end side.

In order to prevent the set of four inner tubes 10a, 10b, 10c and 10d from being pulled out of the outer tube 9, retaining rings 15 and 15 are fixed on the inner peripheral surface of the outer tube 9 in two steps, upper and lower. Locking portions 16, 16 that lock inside the retaining rings 15, 15 are fixed in two stages, upper and lower, on the inner pipes 10a to 10d side. The vertical distance between the retaining rings 15 and 15 is larger than the vertical distance between the locking portions 16 and 16, and the inner pipes 10a to 10d can move in the vertical direction within the outer pipe 9 by the difference in the distance.

The intermediate member 1B is connected to the tip member 1A by screwing the screw portions 8 and 11 of both outer tubes 2 and 9, and further, a set of four inner tubes 10a, 10b, 10c and 10d is attached to the tip member. It is inserted into each of the receiving ports 7 on the 1A side. At this time, since the inner pipes 10a to 10d can move in the vertical direction within the outer pipe 9 with a certain allowable width, the two operations of screwing and inserting can be individually performed with a time lag. A seal member such as an O-ring can be applied to maintain the liquid tightness of the insertion portion.

At the base end side of the intermediate member 1B, another intermediate member 1B is provided with the outer pipes 9, 9 screwed with the threaded portions 11 and 12, and the upper inner pipes 10a to 10d to the base end receiving port 14. By connecting and disconnecting, they are connected in sequence. The figure shows the case where two intermediate members 1B are connected, but the number of connections is not particularly limited.

The base end member 1 C rotatably supports the swivel 25 on the upper side and the cylindrical connecting metal piece 17 on the lower side through bearings 18 and 19 on the outer peripheral portion of the main body 26. There is.

The swivel 25 has four inlets 25a, 25b, 25c and 25d, and the member 1C has four proximal liquid passages 20a, 20b, 20c and 20d, respectively. The base end side of 10d is connected to each of the inlets 25a to 25d through annular grooves 21a, 21b, 21c and 21d. The leading ends of the liquid passages 10a to 10d are opened in the leading end surface of the member 1C so as to be in the same plane arrangement as the receiving port 14, and the insertion portions that can be inserted into the receiving port 14 are inserted into the respective opening portions. An opening 22 is formed.

The base end member 1C is connected to the uppermost intermediate member 1B by screwing the screw portion 17a of the connecting member 17 and the upper end screw portion 12 of the outer tube 9 of the intermediate member 1B, and further inserts each The recess 22 is inserted into each of the corresponding receptacles 14. In order to enable the screwing operation and the inserting operation to be performed individually and with a time lag, it is preferable that the connecting metal piece 17 is supported by the base end member 1C so as to be vertically movable with a predetermined allowable width. The figure shows a case where the bearing 19 is fixedly mounted on the connecting fitting 17, and the base end member 1C is fitted and supported so as to be vertically movable along the sliding surface 23. A stopper 24 for preventing slipping out is formed at the lower end portion.

FIG. 5 (a) shows the situation at the time of drilling operation. At this time, if drilling water is supplied from the inlet 25d of the swivel 25, the drilling water will become clear as shown in FIG. From 25d to the annular groove 21d connected thereto, the base end liquid passage 20d, the passage in the inner pipe 10d, and the tip liquid passage 5d are sequentially ejected from the tip discharge port 3a, and can contribute to drilling as usual. .

[0021] Fig. 5 (b) shows the situation during the primary injection, that is, the operation of injecting the instantaneous drug solution. In this operation, when the main agent and the curing agent are individually supplied from the inlets 25a and 25b of the swivel 25, the main agent and the curing agent are supplied from the inlets 25a and 25b to each other as shown in FIG. The annular grooves 21a and 21b to be connected, the proximal end liquid passages 20a and 20b, the liquid passages in the inner pipes 10a and 10b, and the distal liquid passages 5a and 5b sequentially flow into the annular groove 6a, where they are mixed. Meanwhile, it is injected into the ground through the upper discharge port 2a communicating with the groove 6a.

FIG. 5C shows the situation during the secondary injection, that is, the operation of injecting the slow-moving drug. At the time of this operation, the slow-moving drug solution, which is adjusted to have a predetermined pot life in advance, is supplied to the inlet 25c of the swivel 25, and the supplied slow-moving drug solution is as shown in FIG. From the inlet 25, the annular groove 21c connected to the inlet 25, the base end liquid passage 20c, the liquid passage in the inner pipe 10c, the tip liquid passage 5c, and the annular groove 6b are sequentially passed, and then the groove 6b. It is injected into the ground through the lower discharge port 2b connected to.

By using the four liquid passages formed in the shaft tube portion 1 as described above, the drilling water injection, the primary injection and the secondary injection necessary for the composite injection can be performed, so that the discharge port can be switched. It is not necessary at all, and it is possible to omit the provision of the switching mechanism for the projecting port and the drive device for the inner pipe.

In the present invention, the tip member 1A, the intermediate member 1B, and the base member 1C are usually made of metal such as iron in consideration of the strength. It is desirable that it be as light and inexpensive as possible, as multiple pieces of it will be used in succession.

As shown in the embodiments of FIGS. 6 to 12, of the constituent elements of the intermediate member 1B, the inner tube portion which does not require such strength is molded from plastic such as polyvinyl chloride. Since the intermediate member 1B is made of the inner tube, the weight and manufacturing cost of the intermediate member 1B can be reduced. This will be described below in detail with reference to the drawings.

According to this embodiment, the intermediate member 1B is composed of a metal outer pipe 27, a plastic inner pipe 28, and a metal joint fitting 29.

As is apparent from the exploded view shown in FIG. 7, the metal outer tube 27 has a convex joint portion 30 having an outer diameter substantially equal to its inner diameter on the base end side. Four connecting passages 31a, 31b, 31c, 31d (see FIG. 9) are formed on a concentric circle at equal intervals.

The inner pipe 28 made of plastic has an outer diameter substantially equal to the inner diameter of the outer pipe 27, and four inner pipes 28 are arranged in the same inner plane as the communication passages 31a to 31d. Intermediate liquid passages 32a, 32b, 32c, 32d (see FIG. 10) are formed.

The joint fitting 29 has a disc portion 33 having a diameter substantially equal to that of the inner pipe of the outer pipe 27, and the same plane arrangement as the liquid passages 32 a to 32 d formed integrally with the disc portion 33. 4 tubular parts 34a, 34b, 34c, 34d (see FIG. 9), the upper parts of the tubular parts 34a to 34d are above the disk part 33, and the lower parts are below the disk part 33. To, respectively.

When assembling the intermediate member 1B, as shown in FIG. 7, the packing 35, the inner pipe 28, and the joint fitting 29 are inserted in this order into the outer pipe 27 through the front end opening thereof.

FIG. 8 shows a state after the intermediate member 1B is assembled. The tubular parts 34a to 34d of the joint fitting 29 are inserted into the enlarged diameter parts of the distal ends of the liquid passages 32a to 32d of the inner pipe 28. ing. An O-ring can be inserted in this insertion part.

In order to prevent the inner pipe 28 and the joint fitting 29 from coming out of the outer pipe 27, a retaining ring 37 is attached to a circumferential groove 36 formed in the inner peripheral surface of the lower end portion of the outer pipe 27. The retaining ring 37 is locked to the outer peripheral portion of the lower surface of the disc portion 33 of the joint fitting 29 to prevent downward pullout (toward the tip).

At the lower end of the outer pipe 27, a concave joint portion 38 is formed so as to be located below the lower surface of the disc portion 33 of the joint metal fitting 29. Inside the concave joint portion 38, the joint metal fitting 29 is formed. The lower portions of the tubular portions 34a to 34d of are protruding.

In FIG. 8, the joining state of the intermediate members 1B, 1B is shown by imaginary lines, and in this joining state, the concave joint portion 30 is fitted in the concave joint portion 38. In this fitted state, the lower portions of the tubular parts 34a to 34d of the joint fitting 29 are fitted into the connecting passages 31a to 31d of the convex joint part 30. By this insertion, the liquid passages 32a to 32d and 32a to 32d of the inner tubes 28 of the upper and lower intermediate members 1B and 1B are communicated with each other through the tubular portions 34a to 34d. In order to match each of the four liquid passage holes 35a formed in the packing 35 with the liquid passages 32a to 32d of the inner pipe 28, the packing 35 is provided on the base end side of the inner pipe 28 before the intermediate member 1B is assembled. It is preferable to attach and fix it to the surface.

In order to connect the distal end side of the intermediate member 1B to the proximal end side of the distal end member 1A at the concave joint portion 38, the proximal end side of the intermediate member 1B is connected to the proximal end side of the outer tube 2 of the distal end member 1A. The convex joint portion 30 having the same structure and size as the side convex joint portion 30 is formed, and the joint portion 30 has communication passages 31a to 31d communicating with the tip liquid passages 5a to 5d formed in the plug body 3. Are formed.

Further, in order to connect the base end side of the intermediate member 1B to the tip end side of the base end member 1C in the convex joint portion 30, the concave joint portion 38 of the intermediate member 1B is attached to the tip end side of the base end member 1C. A concave joint portion 38 having the same structure and size as the above is formed, and the upper portions of the four tubular portions 34a to 34d of the joint fitting 29 installed in the concave joint portion 38 are the base end formed in the base end member 1C. It is inserted and attached to the enlarged diameter portion of the liquid passages 20a to 20d. A retaining ring 37 is applied to prevent the joint fitting 29 from coming off.

With the above configuration, similarly to the case where the intermediate members 1B and 1B are connected to each other, the intermediate member 1B, the distal end member 1A and the proximal end member 1C can be easily formed by using the concave and convex joint parts 38 and 30. Can be connected to.

The concavo-convex joint portions 38, 30 are provided with a coupling means composed of a coupling pin 39 and a pin hole 40 as shown in FIG.

The pin hole 40 is formed in a lateral and linear shape across the outer peripheral wall 38 a of the concave joint portion 38 and the convex joint portion 30 fitted in the concave joint portion 38. Shows a case where they are formed parallel to each other at 180 ° intervals. By inserting the pin 39 into the pin hole 40, the concavo-convex joint portions 38 and 30 can be prevented from coming off and restrained under the rotation stop.

On the other hand, by pulling out the pin 39, the fitting of the concavo-convex joint portion can be easily released.

In the joint portion of each step, the pin hole 40 and the communication passages 31a to 31d have the same planar positional relationship. As a result, after the concave-convex joint portions 38 and 30 are fitted, the concave joint-side hole portion 40a and the convex joint-side hole portion 40b are aligned to form the pin holes 40. , The communication passages 31a to 31d are automatically aligned vertically. Therefore, the liquid passages at the respective stages, which are connected to the communication passages 31a to 31d through the tubular portions 34a to 34d of the joint fitting 29, also automatically coincide with each other in the vertical direction. Thus, when the tip member 1A, the intermediate member 1B, and the base member 1C are sequentially connected to form the barrel 1, the operation of aligning the communication passage and the liquid passage is not particularly necessary.

In order to automatically align the concave joint side hole 40a and the convex joint side hole 40b, the lower end surface of the outer peripheral wall 38a of the concave joint portion 38 at each step joint portion And the concave-convex portions 41a and 41b for alignment are formed between the upper end surface of the outer peripheral portion on the side of the convex joint portion 30 that is abutted against this. When the concavo-convex portions 41a and 41b are fitted with each other, the hole portions 40a and 40b are automatically aligned and the pin hole 40 is formed.

According to the present embodiment, the tip end member 1A, the intermediate members 1B, 1B, ... By fitting the concave and convex joints 38, 30 and inserting the pin 39 into the pin hole 40 in the fitted state. Further, since the base end member 1C can be sequentially connected, the connection operation becomes easy and the structure of the joint portion becomes simple. Further, among the constituent elements of the intermediate member 1B, the inner pipe portion is composed of a single plastic inner pipe 28, and therefore the weight is light and the material cost is low, so that the manufacturing cost can be reduced.

In this embodiment, the inner tube portion of the intermediate member 1B is made of a single plastic inner tube, and the connection of the members 1A, 1B and 1C is achieved by fitting the concave and convex joint portions. Except for the fact that it is performed and the connection and integration of the concavo-convex joint portion is performed by applying a connecting means of a pin and a pin hole, there is substantially no difference from the embodiment shown in FIG.

According to the present invention, as shown in FIG. 6, check valves 42, 43 and 44 of various known shapes are provided at the upper discharge port 2a, the lower discharge port 2b and the lower discharge port 3a. You can

[0046]

【effect】

 In the device of the present invention, by utilizing four liquid passages, it is possible to stably and reliably perform drilling water injection, primary injection and secondary injection, which are required for complex injection, without the need to switch the discharge port. Since it does not require any provision of a discharge port switching mechanism or a drive device for the inner tube, the purpose of compound injection can be simply achieved in terms of device and operation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the device of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line 4-4 of FIG.

FIG. 5 is an overall schematic view showing an operating state of the device of the present invention.

FIG. 6 is a longitudinal sectional view showing another embodiment of the device of the present invention.

FIG. 7 is an exploded view of the intermediate member.

FIG. 8 is an assembly diagram of the same.

9 is an enlarged cross-sectional view taken along the line 9-9 of FIG.

10 is an enlarged cross-sectional view taken along line 10-10 of FIG.

11 is an enlarged cross-sectional view taken along line 11-11 of FIG.

12 is an enlarged cross-sectional view taken along line 12-12 of FIG.

[Explanation of symbols]

 1 Shaft Cylindrical Member 1A Tip Member 1B Intermediate Member 1C Base End Member 2 Outer Tube 2a Upper Discharge Port 2b Lower Discharge Port 3 Plug 3a Tip Discharge Port 4 Tip Bit 5a Tip Liquid Passage Channel 5b Tip Liquid Passage Channel 5c Tip Fluid Passage Channel 5d tip liquid passage 6a annular groove 6b annular groove 7 receiving port 8 screw part 9 outer pipe 10a inner pipe 10b inner pipe 10c inner pipe 10d inner pipe 11 lower end screw part 12 upper end screw part 13 coupling member 14 receiving ring 16 Locking part 17 Connection fitting 18 Bearing 19 Bearing 20a Base end liquid passage 20b Base end liquid passage 20c Base end liquid passage 20d Base end liquid passage 21a Annular groove 21b Annular groove 21c Annular groove 21d Annular groove 22 Insert 23 Sliding surface 24 Stopper 25 Swivel 25a Injection port 25b Injection port 25c Injection port 25d Injection port

Claims (1)

[Scope of utility model registration request] 1. A shaft cylinder part having four liquid passages extending in the longitudinal direction, and a swivel rotatably fitted to a base part of the shaft cylinder part. Is provided with two upper and lower outlets for the chemical liquid on the outer peripheral surface of the tip, and four outlets for drilling water on the tip, while the swivel is provided with four inlets. The proximal end of the liquid passage is individually communicated with the individual inlets of the swivel, while the distal end has two of the four outlets in the upper outlet and one of the remaining two in the lower outlet. A composite injection device, characterized in that the remaining one is communicated with the discharge port of the lower end face, respectively.