WO2023163416A1

WO2023163416A1 - Water pressure packer for cutting rock

Info

Publication number: WO2023163416A1
Application number: PCT/KR2023/001640
Authority: WO
Inventors: 박종환
Original assignee: 박종환
Priority date: 2022-02-24
Filing date: 2023-02-06
Publication date: 2023-08-31
Also published as: KR102659820B1; KR20230126830A

Abstract

The present invention is for cutting rock with no noise, no vibration, and no dust. More specifically, in order to cut rock by supplying water pressure to expand a rubber tube after a packer is inserted into a hole drilled in the rock, the present invention comprises: a shaft (100); an internal expanding rubber (200) covering the outside of the shaft (100); inner packing caps (300, 300') which are inserted into both ends of the shaft (100) to seal both ends of the internal expanding rubber (200); inner sleeves (400, 400') which surround the outsides of the inner packing caps (300, 300') and both outer ends of the internal expanding rubber (200) so as to prevent water from leaking between the internal expanding rubber (200) and the inner packing caps (300, 300') when the water pressure is applied; an external expanding rubber (500) which covers the outsides of the internal expanding rubber (400) and the inner sleeves (400, 400'); outer sleeves (600, 600') which surround both ends of the external expanding rubber (500) to protect the external expanding rubber (500) when the water pressure is applied; outer packing caps (700, 700') which are screw-coupled to both ends of the shaft (100); an adaptor (800) which is screw-coupled to the outside of one outer packing cap (700) to supply the water pressure to the shaft (100); and a fluid supply tube (900) which is fitted into the adaptor (800) and is inserted into the shaft (100).

Description

Hydraulic Packer for Rock Cutting

The present invention is for incising rock mass in a noiseless, vibration-free and dust-free state, and in detail, after injecting a packer into a hole drilled in the rock mass, water pressure is supplied to expand the rubber tube of the packer so that the rock mass can be cut. It relates to a hydraulic pressure packer for incision.

As a prior art related to a hydraulic pressure packer for rock incision, 'a packer for rock incision using water pressure' is disclosed in Patent Document 1, which includes a cylindrical expansion member divided into a plurality of pieces through a plurality of incision lines, the expansion An elastic member enclosing the member and having a variable diameter depending on whether the expansion member is expanded, preventing the separation of the expansion member, a pressing member provided inside the expansion member and pushing the expansion member outward through water pressure, and the above A cylindrical support member formed by spacing a plurality of branch holes at regular intervals in the circumferential and longitudinal direction so as to accommodate a water pipe through which water supplied by the water supply member provided inside the pressure member and to be sprayed in all directions consists of including

In addition, the 'hydraulic rock cutting method using slots' in Patent Document 2 forms slots in a direction parallel to the drilling mirror in the interval part and slots in the rotational direction perpendicular to the drilling mirror at the lower end of the packer, and then applying water pressure in stages or simultaneously. A method of cutting a rock piece from a parent rock is disclosed.

The 'hydraulic fracturing device and hydraulic fracturing method using the same' of Patent Document 3 includes a pump for compressing a fluid, a nozzle connected to the pump, and a packing part surrounding the outer circumferential surface of the nozzle, and the pressure of the fluid injected through the nozzle A hole is formed in the rock mass, and the rock mass is crushed by the pressure of the fluid injected from the nozzle inserted into the hole.

In the 'non-vibration and noiseless rock crusher using water pressure' in Patent Document 4, when high-pressure water is supplied to the hollow shaft during bedrock crushing, the packer pressurizes the packer while the pressure block moves forward by the water pressure of the high-pressure water injected through the water injection hole. As the packer expands, both sides of the perforated hole drilled in the bedrock are sealed, and the high-pressure water that has flowed into the groove secondarily is supplied to the inside of the packer and the high-pressure water spray pipe through each passage to increase the sealing power of the packer and at the same time It consists of a method in which high-pressure water is sprayed to the outside through a water discharge hole and crushes bedrock by water pressure.

On the other hand, in the above-mentioned conventional technology, there is a problem that water leakage occurs at both ends of the inner expandable rubber during the action of water pressure, so that the water pressure does not work effectively, and the outer expandable rubber has a problem that it is torn while being pressed by direct contact with the bedrock, As a result, the durability of the packer is deteriorated, the life span is short, and a number of packers must be prepared and replaced at the site, so there is a burden that the cost burden and the hassle of replacement work are accompanied.

[Prior art literature]

[Patent Literature]

(Patent Document 1) Korea Patent Registration No. 10-1710476 2017.02.21. registration)

(Patent Document 2) Korean Patent Registration No. 10-1847085 (registered on April 3, 2018)

(Patent Document 3) Korean Patent Registration No. 10-2104260 (registered on April 20, 2020)

(Patent Document 4) Korean Patent Publication No. 10-2020-0004008 (published on January 13, 2020)

The present invention has been made to solve the above problems, and an object of the present invention is to inject a packer into a hole drilled in a bedrock and then supply water pressure to expand a rubber tube to achieve a noise-free, vibration-free, and dust-free state by the rock breaking force. Provides a hydraulic pressure packer for bedrock cutting that can cut bedrock, but prevents water leakage from the internal expansion rubber so that the water pressure can effectively act, and prevents the external expansion rubber from being damaged by bedrock, so that low-cost and effective bedrock cutting work are making this possible.

In order to achieve the above object, the present invention provides a shaft having externally threaded portions formed at both ends, through-holes formed in the longitudinal direction on the inside, and pressure-receiving holes radially communicated from the through-holes formed in the middle portion; an inner expansion rubber covered on the outside of the shaft; an inner packing cap inserted into both ends of the shaft to seal both ends of the inner expandable rubber; an inner sleeve which surrounds the outside of the inner packing cap and both ends of the inner expansion rubber to prevent leakage between the inner expansion rubber and the inner packing cap when water pressure is applied; an external inflatable rubber covered on the outside of the internal inflatable rubber and the inner sleeve; an outer sleeve which surrounds both ends of the externally expanded rubber and protects the externally expanded rubber when water pressure is applied; an outer packing cap screwed to both ends of the shaft; an adapter screwed to the outer side of the outer packing cap to supply water pressure to the shaft; A fluid supply pipe fitted to the adapter and inserted into the shaft, and the outer side of the other outer packing cap seals the shaft, and a nozzle or drawing for spraying by receiving water pressure from the fluid supply pipe. A hydraulic pressure packer for rock cutting in which a piston is screwed is provided.

In the hydraulic pressure packer according to an embodiment of the present invention, since inner sleeves are covered on both outer sides of the inner expandable rubber, when water pressure is applied, water leakage can be prevented from occurring at the joint between the inner packing caps at both ends of the inner expandable rubber. As the expansion operation of the internal expansion rubber is normally performed, the external expansion rubber is inflated to effectively cut the bedrock, and the external expansion rubber is inflated while protected by a cover to prevent damage due to direct contact with the bedrock. There is a useful effect of being able to improve the durability of the hydraulic packer.

1 is an exploded perspective view of a hydraulic pressure packer for rock cutting according to a first embodiment of the present invention;

Figure 2 is a combined perspective view of the hydraulic packer shown in Figure 1;

3 is a longitudinal sectional view of the hydraulic packer shown in FIG. 2;

4 is an expansion state diagram of a hydraulic packer;

5 is a longitudinal cross-sectional view of a hydraulic pressure packer for rock cutting according to a second embodiment of the present invention;

FIG. 6 shows a state in which water pressure is applied to the piston in FIG. 5 .

Hereinafter, preferred embodiments that do not limit the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a hydraulic pressure packer 1 for rock cutting according to a first embodiment of the present invention, which has

male screw parts

110 and 120 formed on the outside of both ends and a through hole 130 in the longitudinal direction on the inside. is formed, and a shaft 100 having a pressure receiving hole 140 radially communicated with the through hole 130 at a middle portion thereof; an inner expansion rubber 200 covered on the outside of the shaft 100; inner packing caps 300 and 300' inserted into both ends of the shaft 100 to seal both ends of the inner expandable rubber 200; Inner sleeves 400 and 400' which wrap the outside of the inner packing caps 300 and 300' and both ends of the inner expansion rubber 200 to prevent leakage between the inner expansion rubber 200 and the inner packing caps 300 and 300' when water pressure is applied. )and; an external inflatable rubber 500 covered on the outside of the internal inflatable rubber 200 and the inner sleeves 400 and 400';

outer sleeves

600 and 600' which surround both ends of the external inflatable rubber 500 and protect the external inflatable rubber 500 when water pressure is applied; External packing caps 700 and 700' screwed to both ends of the shaft 100; an adapter 800 screwed to the outer side of the outer packing cap 700 to supply water pressure to the shaft 100; and a fluid supply pipe 900 fitted to the adapter 800 and inserted into the shaft 100, and sealing the shaft 100 on the outside of the other outer packing cap 700'. And, a nozzle N for receiving and spraying water pressure from the fluid supply pipe 900 or a piston for drawing (P; see FIGS. 5 and 6) is screwed together.

In this embodiment, the outer packing caps 700 and 700' are covered with a cover 1000 for preventing damage to the external expanded rubber 500, and the cover 1000 is radially divided into a plurality (two in the drawing) And, it is coupled with a bolt 1200 under the interposition of a spring 1100 to the outer packing caps 700 and 700' so that they can be opened when the external inflatable rubber 500 expands. It stays in close contact with the outer packing caps 700 and 700', and when subjected to water pressure, overcomes the elasticity of the spring 1100 and expands to the outside according to the expansion of the external inflatable rubber 500, so that the external inflatable rubber 500 ) is designed to prevent it from being torn by directly contacting the inner surface of the drilled hole in the rock mass.

The shaft 100 is made of carbon steel or stainless steel, and as described above,

male screw parts

110 and 120 screwed to the outer packing caps 700 and 700' are formed on both ends outside, and the inside has through holes in the longitudinal direction. 130 is formed, and a hydraulic pressure hole 140 radially communicating with the outside is formed in the middle portion of the through hole 130 to serve to expand the internal inflatable rubber 200 by hydraulic pressure.

The internal expansion rubber 200 is covered on the outside of the shaft 100, and the

coupling jaws

210 and 220 at both ends are press-fitted into the coupling jaws 310 formed on the inner packing caps 300 and 300' made of metal to seal the seal. The inner packing cap 300 has a U-packing 320 inserted therein so that watertightness is maintained on the outer surface of the shaft 100.

The inner sleeves 400 and 400' are made of a single tube of a metal material, and as can be seen in the longitudinal cross-sectional view of FIG. 3, the inner expansion rubber 200, the inner packing caps 300 and 300', and the outer packing cap 700 At the same time, when water pressure is applied to the inner expandable rubber 200, the inner expandable rubber 200 expands and both ends of the inner expandable rubber 200 also try to expand, the inner expandable rubber 200 As the coupling state with the inner packing caps 300 and 300' is broken by the expansion of both ends, it plays a role in preventing leakage from occurring in this part.

The external expansion rubber 500 expands by the expansion of the internal expansion rubber 200 and serves to cause tensile cracks in the drilling holes of the bedrock. Both ends of the external expansion rubber 500 are in the form of a single tube made of metal The

outer sleeves

600 and 600' are covered and inflated to a protected state, and then contracted again so that they can be restored to their original state.

The outer packing caps 700 and 700' have a female screw portion 710 through which they are coupled to the shaft 100 and the adapter 800 at the center, and an O- A ring 720 is fitted, and a bolt hole 732 for attaching the cover 1000 is formed in the flange portion 730.

The adapter 800 is detachably coupled to the female screw portion 710 of the outer packing cap 700 on one side, and one can supply water pressure to the fluid supply pipe 900 and the other can supply water pressure to the shaft 100. Two hydraulic

pressure supply lines

810 and 820 are formed so as to be.

Both ends of the fluid supply pipe 900 are press-fitted into the adapter 800 and the nozzle N, respectively, and are supplied with water pressure from the water pressure supply line 810 in a state where watertightness is maintained by O-

rings

910 and 920, and will be sprayed

Reference numeral 830 in the drawing is a valve provided in the water pressure supply line 820.

The hydraulic pressure packer according to the present embodiment configured as described above is inserted into a drilled hole formed for incision of rock mass, and when water pressure is applied to the inside of the packer 1 through the hydraulic pressure supply line 820 of the adapter 800 from the outside, the inside As the expansion rubber 200 and the external expansion rubber 500 expand, cracks are formed and widened by the rock breaking force generated, so that the bedrock can be cut.

In the packer 1 according to the present embodiment, since the inner sleeves 400 and 400' are fitted outside both ends of the inner expandable rubber 200 as described above in a situation where water pressure is applied to the inner expandable rubber 200, the inner expandable rubber ( 200), the water pressure is not applied to the joint with the inner packing caps 300 and 300' coupled to both ends, so that the coupling state with the inner packing caps 300 and 300' is not broken or leaks do not occur. The applied water pressure fully and effectively acts on the expansion action of the internal inflatable rubber 200, and the external inflatable rubber 500 is expanded by the expansion of the internal inflatable rubber 200 and pressurizes the inner surface of the drilling hole in the bedrock to prevent rock formation. At this time, since the divided cover 1000 is covered on the outside of the external inflatable rubber 500, the external inflatable rubber 1000 is prevented from being torn due to direct contact with the bedrock.

5 shows a hydraulic packer 1 according to a second embodiment of the present invention, which uses a piston P for drawing instead of the hydraulic injection nozzle N disclosed in the first embodiment shown in FIGS. 1 to 4 This is screwed, and after expansion of the packer 1, from the water pressure supply line 810 of the adapter 800 to the piston P for drawing through the fluid supply pipe 900 in order to separate the packer 1 from the drilled hole. When water pressure is supplied, the piece (P) for drawing is stretched to push the hydraulic packer 1 out of the drilling hole, so that the hydraulic packer 1 can be easily separated from the drilling hole.

In the accompanying drawings and the above description, the structure of the hydraulic packer according to the present invention and the basic method of use have been mainly described, but the hydraulic packer of the present invention is not limited to the above description and replaces the existing hydraulic packer in various ways. As a method, for example, a plurality of hydraulic packers may be connected in a row and inserted into a deeply formed drilling hole to cut rock mass or to be used in combination with an existing wedge-type packer.

As described above, the hydraulic pressure packer according to the present invention inserts a protective inner sleeve on both ends of the inner expandable rubber, which was a vulnerable part of leakage in the existing hydraulic packer, and the outside of the external expandable rubber, which was a vulnerable part of breakage due to direct contact with the bedrock. By covering the split type cover, when water pressure is applied, the rock breaking force by effective rubber expansion is applied to cut the bedrock, and the cover prevents tearing due to direct contact with the bedrock. Since durability can be improved, effective bedrock incision at low cost is possible.

[Description of code]

1 : Hydraulic Packer

100: shaft

200: internal expansion rubber

300,300' : inner packing cap

400,400' : inner sleeve

500: external expansion rubber

600,600' : Outer sleeve

700,700' : External packing cap

800: adapter

900: fluid supply pipe

1000: cover

1100: spring

1200: bolt

Claims

Male screw portions 110 and 120 are formed on the outside of both ends, through holes 130 are formed on the inside in the longitudinal direction, and in the middle, a pressure receiving hole 140 radially communicating with the through hole 130 is formed. Shaft 100 and;

an inner expansion rubber 200 covered on the outside of the shaft 100;

inner packing caps 300 and 300' inserted into both ends of the shaft 100 to seal both ends of the inner expandable rubber 200;

Inner sleeves 400 and 400' which wrap the outside of the inner packing caps 300 and 300' and both ends of the inner expansion rubber 200 to prevent leakage between the inner expansion rubber 200 and the inner packing caps 300 and 300' when water pressure is applied. )and;

an external inflatable rubber 500 covered on the outside of the internal inflatable rubber 400 and the inner sleeves 400 and 400';

outer sleeves 600 and 600' which surround both ends of the external inflatable rubber 500 and protect the external inflatable rubber 500 when water pressure is applied;

External packing caps 700 and 700' screwed to both ends of the shaft 100;

an adapter 800 screwed to the outer side of the outer packing cap 700 to supply water pressure to the shaft 100;

A fluid supply pipe 900 fitted to the adapter 800 and inserted into the shaft 100;

The outer side of the other outer packing cap 700' seals the shaft 100, and a nozzle N for spraying by receiving water pressure from the fluid supply pipe 900 or a drawing piston P is screwed. Characterized by a hydraulic pressure packer for rock cutting.
The method of claim 1,

The external packing caps (700, 700') are covered with a cover (1000) for preventing damage to the external expansion rubber (500).
The method of claim 2,

The cover 1000 is radially divided into a plurality of parts, and is coupled to the outer packing caps 700 and 700' with a bolt 1200 under the interposition of a spring 1100 so as to be opened when the external inflatable rubber 500 expands. A hydraulic pressure packer for bedrock cutting.
The method of claim 1,

The inner sleeves 400 and 400' are made of a single tube of a metal material and are inserted to cover the inner expansion rubber 200, the inner packing caps 300 and 300', and the outer packing cap 700 at the same time. for hydraulic pressure packer.