JP3019261U - Water seal rubber stopper for ground penetration hole - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rubber stopper that reliably stops the spring water from the hole penetrating into the ground. [Structure] Both ends of a hollow rubber cylinder 2 having an outer diameter which is loosely fitted into a hole 11 penetrating into the ground 9 are covered with a pair of washers 4 having a central hole. The bolt shaft of the bolt 5 penetrates the center hole of the pair of washers 4 and the hollow portion 3 of the rubber cylinder 2, the bolt head 6 is seated on one washer 4, and the nut 7 is attached to the screw tip 7 of the bolt 5. Are screwed together to form a rubber stopper 1. After inserting the rubber stopper 1 into the hole 11, the nut 8 is screwed into the bolt 5 so that the rubber cylinder 2
Is compressed in the lengthwise direction of the central axis and expanded in the radial direction, so that the rubber tubular body 2 is brought into close contact with the hole 11 and the bolt 5 to seal the ground penetration hole 11 in a watertight manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water sealing rubber plug for a ground penetration hole, and more particularly to a rubber plug for sealing spring water from the ground to the ground penetration hole.

[0002]

[Prior art]

 An example of a conventional water sealing method for the ground penetration hole is shown in FIG. In the holes 11 formed in the wall body 10 such as a concrete wall covering the ground 9, water leakage such as spring water shown by an arrow W is often experienced. To stop this leak, insert the packer manifold 15 into the hole 11 as shown in FIG. 3 (A), inject the cement milk 13 into the ground 9 under pressure, and after a certain time, insert the packer manifold 15 from the hole 11 into the ground 9. Pull out. If the water W does not stop even after this injection, as shown in FIG. 3 (C), the portion other than the vinyl hose 17 inside the hole 11 is quickly connected while letting water escape with a thin vinyl hose 17 with a diameter of about 10 mm. Set with cement 14. After the quick-setting cement 14 is hardened sufficiently, bend the tip of the vinyl hose 17 as shown in Fig. 3 (D) to stop the outflow of water, and then sharpen the mouth of the hole 11 as shown in Fig. 3 (E). Fill with cement 14 and shape the surface. When the spring water is intense, it has been also experienced that the water leakage from the hole 11 cannot be stopped even by such a treatment.

[0003]

[Problems to be solved by the device]

 The conventional water-sealing method of FIG. 3 has problems that the operation is troublesome and time-consuming, and in some cases, it is difficult to completely stop the spring water. Therefore, it is an object of the present invention to provide a rubber stopper that reliably stops spring water.

[0004]

[Means for Solving the Problems]

 Referring to the embodiment of FIG. 1, a water seal rubber plug 1 of a ground penetration hole 11 according to the present invention is a hollow rubber cylinder 2 having an outer diameter that fits loosely into a hole 11 that penetrates into the ground 9 and a rubber cylinder. A pair of washers 4 with a central hole covering both ends of the body 2, a bolt head 6 that seats on one washer 4, and a bolt that penetrates the central hole of the pair of washers 4 and the hollow portion 3 of the rubber cylinder 2. 5 and a nut 8 to be screwed onto the screw tip 7 of the bolt 5, and by screwing the nut 8 into the bolt 5, the rubber cylinder 2 is compressed in the central axis direction and expanded in the radial direction. The body 2 is brought into close contact with the hole 11 and the bolt 5 to seal the hole 11 in a watertight manner.

An example of the ground penetration hole 11 is a through hole drilled in the concrete wall body 10 or the like covering the ground 9, but when the ground 9 is rock, it may be a hole drilled directly in the rock.

[0006]

[Action]

 The operation will be described with reference to the embodiment shown in FIG. In this case, the water seal rubber plug 1 of FIG. 1 is inserted into the ground penetration hole 11 which is a through hole of the wall body 10 in a state before the nut 8 is tightened. Before tightening the nut 8, the outer diameter of the rubber cylinder 2 is selected so as to fit loosely into the ground penetration hole 11, so that the water seal rubber plug 1 can be easily pushed from the mouth of the hole 11 to the required depth. Can be plugged into. Next, if the nut 8 of the water seal rubber plug 1 at the inserted position is screwed into the bolt 5, the distance between the pair of washers 4 at both ends of the rubber cylinder 2 is narrowed by the screwing of the nut 8, The rubber cylinder 2 is compressed in the axial direction and expands in the radial direction. Due to this radial expansion, the inner surface of the hollow portion 3 of the rubber tubular body 2 comes into close contact with the bolt 5, and the outer peripheral surface thereof comes into close contact with the inner surface of the ground penetration hole 11. At this time, the outer peripheral surface of the rubber cylinder 2 and the inner peripheral surface of the hollow portion 3 are elastically deformed along the fine irregularities on the inner surface of the ground penetration hole 11 and the outer peripheral surface of the bolt 5. Therefore, if the radial expansion force of the rubber tubular body 2 due to the screwing of the nut 8 is made sufficiently large, the outer peripheral surface of the rubber tubular body 2 and the inner surface of the ground penetration hole 11 are in close contact with each other and the inner peripheral surface of the hollow portion 3 and the bolt 5 are attached. Due to the close contact with the outer peripheral surface of the ground, the ground penetration hole 11 can be reliably sealed in a watertight manner.

Thus, it is possible to achieve the object of the present invention to provide a "rubber stopper that reliably stops spring water".

[0008]

【Example】

 FIG. 4 shows an embodiment of the rubber stopper 20 with a check valve. A hollow bolt 21 is used instead of the bolt 5 in FIG. A hollow bolt 21 is passed through a pair of a rubber cylinder 2 and a washer 4, and a bolt head 6 is seated on one washer 4, and a nut 8 screwed to a screw tip 7 is loosely screwed to the other washer 4. . A valve chamber (22) whose tip on the screw tip side is closed by a valve seat wall (24a) with a valve port (24) is formed in a hollow portion of a hollow bolt (21). For example, one end of a spring 26, which is a coil spring, faces the valve opening 24 and the other end is locked in the valve chamber 22. In the illustrated example, a stepped spring seat 25 is provided between one end of the valve chamber 22 and the hollow portion of the hollow bolt 21, and the other end of the spring 26 is fixed to the spring seat 25. The valve element 23 for opening and closing the valve opening 24 is brought into contact with the one end of the spring 26, and the spring 26 presses the valve element 23 toward the valve opening 24. The elastic force of the spring 26 is appropriately selected, and the elastic force normally presses the valve body 23 to close the valve opening 24. When a large pressure above a certain level is applied from the screw tip 7 side of the rubber plug 20 with a check valve having the above structure to the screw head 6 side as shown by an arrow G, the elasticity of the spring 26 and the water pressure of the spring water W. Against this, the valve body 23 is separated from the valve opening 24 so that the valve opening 24 is opened.

Referring to FIG. 5 showing one application of the rubber plug 20 with a check valve, if the bolt head 6 of the hollow bolt 21 is inserted into the ground penetration hole 11 with the ground 9 side, and the nut 8 is screwed in sufficiently, By the rubber cylinder 2 which is expanded in the direction and the valve body 23 which is pressed by the valve port 24, the ground penetration hole 11 can be sealed with the spring water W of the ground 9 in a water seal. In this state, a grout material such as cement milk 28 is injected into the screw tip 7 of the hollow bolt 21 toward the ground 9 by the manifold 16 at a high pressure above the predetermined pressure as shown by an arrow G in FIG. The body 23 can be separated from the valve opening 24, the valve opening 24 can be opened, and the grout material can be injected into the ground 9 through the gap of the spring 23 and the hollow portion 3 of the hollow bolt 21. At the completion of grout injection, if the manifold 16 is removed from the rubber plug 20 with a check valve to eliminate the grout pressure, the spring 26 presses the valve body 23 against the valve seat wall 24a and closes the valve opening 24, so that the spring W Prevents water leakage and functions as a check valve. Step 610 in the flowchart of FIG. 6B shows the one-step injection method described above. If necessary, the capping as shown in FIG. 2B may be performed in step 611.

FIG. 7 and FIG. 9 show a procedure of conventional multi-stage grouting. At the end of grout injection work in steps 701 and 702, when it is determined that there is spring water from the injection hole at the time of completing the grout, set the mouth screw packer 29 in step 703 as shown in FIG. After completing the steps, remove the manifold and the screw packer at the mouth in step 705, determine in step 706 whether the spring water has stopped, and repeat the step 703 to 705 until the spring water stops. Even if it is determined in step 706 that the spring water has stopped, it may be necessary to perform the treatment with the vinyl hose and the quick-connecting material already described with reference to FIG. 3 as in step 707 of FIG. 7. If it is determined in step 702 that there is no spring water, the capping in step 708 can be performed immediately.

FIG. 6 (A) shows a procedure for preventing water leakage when there is spring water at the completion of the final stage grout of the grout injection work using the rubber stopper 20 with a check valve of the present invention. When it is determined that there is spring water at step 602 in FIG. 6 (A), in step 603 in FIG. 6 (A), as shown in FIG. 8 (A), a check valve is attached at the tip of the mouth screw packer 29. The injection device to which the rubber stopper 20 is connected is loaded into the ground penetration hole 11, and the hole filling grout in step 604 is performed. When the hole filling grout is completed, the screw packer 29 at the mouth is removed in step 605, and the capping can be immediately proceeded to in step 606 without determining whether or not there is a water leak due to the spring water W. This is because the rubber plug 20 with a check valve reliably seals the spring water. That is, by using the rubber plug 20 with a check valve, a high water-sealing effect can be obtained without repeating the steps 703 to 705 of FIG. 7 and the troublesome procedure of the step 707.

FIG. 10 shows an example of the differential check valve 40 of the present invention. This differential check valve 40 is mounted between the hollow boring rod 50 and the boring bit 51, and when the high pressure grout material is press-fit as shown by the arrow P in FIG. 10, the grout material is ejected from the nozzle 52. At the end of grouting, prevent leakage of water by spring W. The outer diameter of the valve box cylinder 41 is made the same as or smaller than that of the ground penetration hole 11, and a flat valve seat wall 43 with a valve port 44 is provided inside the valve box cylinder 41 so as to cross the valve box cylinder 41. An opposed wall 46 with a through hole 47 is provided inside the valve box cylinder 41 in parallel with the valve seat wall 43 with a gap from the valve seat wall 43 in the axial direction of the valve box cylinder 41. A valve body 48 that is movable in the axial direction of the valve box tubular body 41 is provided in the above-mentioned gap, and the valve body 48 has a pressure-receiving surface on the side of the opposing wall and a pressure-receiving surface on the side of the valve port that can contact the valve port 44. . Regardless of the position of the valve body 48, the through hole 47 of the opposing wall 46 is kept in a conductive state. When the force acting from the facing wall 46 side is larger than the force acting from the valve seat wall 43 side, the valve opening side pressure receiving surface of the valve body 48 is brought into contact with the valve seat wall 43 to close the valve opening 44, and the facing wall 46 side is closed. When a force larger than a predetermined value by a predetermined value or more acts on the valve body 48 from the valve seat wall 43 side, the valve body 48 is separated from the valve opening 44 and the valve opening 44 is opened.

In the illustrated example, the gap between the valve seat wall 43 and the opposing wall 46 is a variable pressure chamber 42, a guide hole 45 is formed in the center of the valve seat wall 43 and the opposing wall 46, and Guide rods 49a and 49b extending in opposite directions are loosely fitted in the guide holes 45 of the valve seat wall 43 and the opposing wall 46.

In FIG. 11, the packer 29 and the differential check valve 40 are combined, the air pipe 53 and the grout pipe 54 are connected to the differential check valve 40 through the packer 29, and the grout hole 55 is provided with a grout hole 55. The injection device with a check valve of the type | system | group which injects the material G. As the packer 29, a screw packer, an air packer, and various other packers can be used. The operation is as described above with reference to FIG. In the case of FIG. 11, the injection hose can be washed by injecting water into the grout G near the completion of the grouting work.

FIGS. 13 and 14 show a conventional conduit box mounting method in a hydraulic tunnel 60, such as a penstock of a hydroelectric power plant. This conduit box allows water to leak from the ground 9 such as the ground to the hydraulic tunnel 60 when the hydraulic tunnel 60 has a low pressure, but prohibits water from leaking from the hydraulic tunnel 60 to the ground 9 when the hydraulic tunnel 60 has a high pressure. In the conventional conduit box mounting method, as shown in FIG. 14, a step of drilling a small diameter hole for a pipe 61, a step of drilling a large diameter hole for a check valve 63, and a pipe are performed on a wall body 10 such as a concrete wall. It was necessary to work in four stages: the step of laying the check valve and the step of laying the check valve. Further, the check valve 63 having a mechanical structure as shown in FIG. 13 (B) may not operate normally depending on its mounting inclination angle, and the mounting angle is limited.

FIG. 12 shows a structure in which the combination of the rubber stopper 1 and the differential check valve 40 of the present invention simplifies the process of mounting the conduit box and eliminates the restriction of the mounting angle. Referring to FIG. 12 (B), the water seal rubber stopper with a differential check valve of the present invention covers both ends of the hollow rubber tubular body 2 having an outer diameter which is loosely inserted into the ground penetration hole 11 and the rubber tubular body 2. Hollow bolt 21, hollow bolt having a pair of washers 4 with central holes, bolt heads 6 seated on the washer 4 on the ground side, and penetrating the central hole of the pair of washers 4 and the hollow portion 3 of the rubber cylinder 2. A nut 8 which is screwed into the screw tip 7 of 21 and a valve box cylinder 41 which fits into the screw tip 7 of the hollow bolt 21 and extends substantially coaxially with the rubber cylinder 2 and traverses the valve box cylinder 41. A flat valve seat wall 43 with a valve port 44 provided therein, and a valve seat wall 43 inside the valve box tubular body 41 with a gap from the valve seat wall 43 in the axial direction of the valve box tubular body 41. The opposing wall 46 with the through hole 47 provided in parallel, and the valve wall side pressure receiving surface movable in the axial direction of the valve box cylinder 41 in the gap and facing the opposing wall and the valve opening side pressure receiving surface. With valve body 48 having Is shall. By screwing the nut 8 into the hollow bolt 21, the rubber cylinder 2 is compressed in the central axis length direction and expanded in the radial direction so that the rubber cylinder 2 is brought into close contact with the ground penetration hole 11 and the hollow bolt 21. The ground penetration hole 11 is watertightly sealed, the through hole 47 of the opposing wall 46 is made conductive regardless of the position of the valve body 48, and the force acting from the opposing wall side 46 acts from the valve seat wall 43 side. When it is larger, the valve opening side pressure receiving surface of the valve body 48 is brought into contact with the valve seat wall 43 to close the valve opening 44, and a force larger than a predetermined value compared with the force acting from the facing wall 46 side is larger than the valve seat wall 43 side. When acting on the valve body 48 from the valve body 48, the valve body 48 is separated from the valve opening 44 and the valve opening 44 is opened.

By mounting the water seal rubber plug 1 with the differential check valve 40 of the present invention as shown in FIGS. 12 (A) and 12 (B), the function of the conduit box can be achieved. Reference numeral 62 in the figure is caulking for capping. Moreover, as shown in FIG. 12C, the water seal rubber plug 1 with the differential check valve 40 is a two-step process of drilling the wall body 10 and attaching the water seal rubber plug with the differential check valve. It can be installed, and there are no restrictions on the installation direction.

[0018]

[Effect of device]

 As described in detail above, the water sealing rubber plug of the ground penetration hole of the present invention has the following remarkable effects because the rubber tubular body is radially expanded by the bolt and the nut to be water sealed. (A) A simple structure enables reliable water sealing. (B) It can be manufactured at low cost. (C) Installation work and adjustment operation are easy. (D) It can be used for a differential type grout injection valve. (E) It can be used to improve the conduit box of a hydraulic tunnel.

[Submission date] August 2, 1995

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

FIG. 10 shows an example of a differential check valve 40 which can be combined with the rubber stopper 1 of the present invention. In the illustrated example, the differential check valve 40 is attached between the hollow rod 50 for boring and the boring bit 51, and when the high pressure grout material is press-fit as shown by an arrow P in FIG. At the end of jetting and grouting, leakage of water by spring W is prevented. The outer diameter of the valve box cylinder (41) is made the same as or smaller than that of the ground penetration hole (11), and a flat valve seat wall (43) with a valve port (44) is provided inside the valve box cylinder (41) across the valve box cylinder (41). An opposed wall 46 with a through hole 47 is provided inside the valve box cylinder 41 in parallel with the valve seat wall 43 with a gap from the valve seat wall 43 in the axial direction of the valve box cylinder 41. A valve body (48) that is movable in the axial direction of the valve box cylinder body (41) is provided in the gap, and the valve body (48) has a pressure receiving surface on the opposite wall side and a valve mouth side pressure receiving surface that can contact the valve opening (44). Regardless of the position of the valve body 48, the through hole 47 of the opposing wall 46 is kept in a conductive state. When the force acting from the opposing wall 46 side is larger than the force acting from the valve seat wall 43 side, the valve body
The valve port side pressure receiving surface of 48 is brought into contact with the valve seat wall 43 to close the valve port 44, and a force greater than a predetermined value is exerted on the valve body 48 from the valve seat wall 43 side compared to the force exerted from the opposing wall 46 side. Sometimes the valve body 48
And the valve opening 44 is opened.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of a wall water seal using a rubber stopper of the present invention.

FIG. 3 is an explanatory view of a wall water seal according to a conventional technique.

FIG. 4 is a sectional view of a rubber plug with a check valve according to the present invention.

FIG. 5 is an explanatory diagram of wall water sealing using a rubber stopper with a check valve.

FIG. 6 is a flow chart of a wall water sealing work using a rubber stopper with a check valve.

FIG. 7 is a flow chart of a spring stop work according to the related art.

FIG. 8 is a two-stage explanatory view of a wall water sealing operation using a rubber plug with a check valve.

FIG. 9 is an explanatory view of three stages of wall surface water sealing work according to the prior art.

FIG. 10 is a sectional view of the differential check valve of the present invention.

FIG. 11 is an explanatory view of a grout injection valve using the differential check valve of the present invention.

FIG. 12 is an explanatory diagram of a conduit box used in the present invention.

FIG. 13 is an explanatory diagram of a conventional conduit box for a hydraulic tunnel.

FIG. 14 is a flowchart of the above-mentioned conventional conduit box installation work.

[Explanation of symbols]

 1 Rubber stopper 2 Rubber cylinder 3 Hollow part 4 Washer 5 Bolt 6 Bolt head 7 Screw tip 8 Nut 9 Ground 10 Wall body 11 Hole 13 Cement milk 14 Quick-setting cement 15 Manifold with packer 16 Manifold 17 Vinyl hose 20 Check valve Rubber stopper with 21 Hollow bolt 22 Valve chamber 23 Valve body 24 Valve seat 26 Spring 29 Packer 30 Capping 40 Differential check valve 41 Valve box cylinder 42 Variable pressure chamber 43 Valve seat wall 44 Valve opening 45 Guide hole 46 Opposing wall 47 Through hole 48 Valve bodies 49a, 49b Guide rod 50 Boring hollow rod 51 Boring bit 52 Nozzle 53 Air pipe 54 Grout pipe 55 Boring hole 60 Hydraulic tunnel 61 Pipe 62 Caulking 63 Check valve.

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[Procedure amendment]

[Submission date] August 2, 1995

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (5)

[Scope of utility model registration request] 1. A rubber stopper for water-sealing a hole penetrating into the ground, a hollow rubber tubular body having an outer diameter that loosely fits into the hole, a pair of washers with a central hole covering both ends of the rubber tubular body, and one of the washers. A bolt having a bolt head to be seated on and penetrating the center hole of the washer pair and the hollow portion of the rubber cylinder, and a nut screwed into the screw tip of the bolt, and screwing the nut into the bolt A water-sealing rubber plug for a ground penetration hole that seals the ground penetration hole in a watertight manner by compressing the rubber cylinder in the central axis direction and expanding the rubber cylinder in the radial direction so that the rubber cylinder is brought into close contact with the hole and the bolt. 2. The rubber plug according to claim 1, wherein the bolt is a hollow bolt, and a valve chamber having a screw tip end closed by a valve seat wall with a valve opening is formed in a hollow portion of the bolt, and one end of a spring is formed. To the valve opening, the other end is locked in the valve chamber, the valve body that opens and closes the valve opening is held at the one end of the spring, and the spring normally presses the valve body against the valve opening. Close your mouth,
A rubber plug with a check valve, which opens the valve opening by separating the valve body from the valve opening against the spring when a large pressure of a certain amount or more acts from the screw tip side to the screw head side. 3. A valve box cylinder having a diameter equal to or smaller than that of a hole penetrating into the ground, a flat valve seat wall with a valve opening provided inside the valve box crossing the valve box cylinder, and the valve box. An opposed wall with a through hole provided inside the tubular body in parallel to the valve seat wall with a gap from the valve seat wall in the axial direction of the valve box tubular body, and in the axial direction movable in the axial direction of the valve box tubular body. And a valve body having a facing wall-side pressure receiving surface and a valve opening-side pressure receiving surface capable of contacting the valve opening,
Regardless of the position of the valve element, the through hole of the opposing wall is made conductive, and when the force acting from the opposing wall side is larger than the force acting from the valve seat wall side, the valve port side pressure receiving surface of the valve element is The valve opening is closed by abutting against the valve seat wall, and the valve body is separated from the valve opening when a force larger than a predetermined value is applied to the valve body from the valve seat wall side compared to the force acting from the opposing wall side. Differential check valve for ground penetration hole with open valve opening. 4. The differential check valve according to claim 3, wherein guide holes are provided in the valve seat wall and the opposing wall, and guide rods slidably fitted in the guide holes are provided on both surfaces of the valve body. Differential check valve for ground penetration hole. 5. A rubber stopper for water-sealing a hole penetrating into the ground, a hollow rubber tubular body having an outer diameter which loosely fits into the hole, a pair of washers with a central hole covering both ends of the rubber tubular body, and the ground side said A hollow bolt having a bolt head seated on a washer and penetrating the center hole of the washer pair and the hollow portion of the rubber cylinder, a nut screwed into a screw tip of the hollow bolt, and a screw tip portion of the hollow bolt. A valve box tubular body which is fitted to and extends coaxially with the rubber tubular body,
A flat valve seat wall with a valve opening provided inside the valve box cylinder, the valve being inside the valve box cylinder with a gap from the valve seat wall in the axial direction of the valve box cylinder. A counter wall with a through hole provided in parallel with the seat wall, and a counter wall side pressure receiving surface movable in the axial direction of the valve box cylinder in the gap and a valve port side pressure receiving surface capable of contacting the valve opening. A valve body having, and by screwing the nut into the hollow bolt, the rubber cylinder is compressed in the central axis direction and expanded in the radial direction so that the rubber cylinder is brought into close contact with the hole and hollow bolt. Is watertightly sealed, the through hole of the facing wall is made to conduct regardless of the position of the valve body, and when the force acting from the facing wall side is larger than the force acting from the valve seat wall side, the valve body The valve-side pressure receiving surface of the valve seat is brought into contact with the valve seat wall to close the valve port, and a predetermined value is compared with the force acting from the opposing wall side. Large force differential check valve with water sealing rubber stopper of the ground penetration hole formed by opening the valve port releases the valve body from the valve port when acting on the valve body from the valve seat wall side of the upper.