A telescopic self-recovering high-voltage quick connection device and its application

Abstract

The invention discloses a telescopic self-restoring high-pressure quick-connect device, which is composed of an equal-diameter sealing quick-connect device, a telescopic pipeline device and a booster device; wherein: the equal-diameter sealing quick-connect device is used to realize quick connection and locking of the pipeline; the telescopic pipeline device is used to realize the extension of the pipeline by a certain distance, so as to facilitate the connection of the pipeline inside the drill pipe; the booster device is used to realize the automatic contraction of the pipeline after the high-pressure medium passes through the pipeline; the equal-diameter sealing quick-connect device is quickly connected with the telescopic pipeline device, and after the connection, the inner diameters of the equal-diameter sealing quick-connect device and the telescopic pipeline device are consistent, and when there is no high-pressure medium in the pipeline, the telescopic pipeline device can be axially extended and contracted by a certain distance; when the high-pressure medium passes through the pipeline, the telescopic pipeline device can automatically contract along the axial direction to shorten the pipeline connection length; the booster device is coaxially installed with the telescopic pipeline device, and the high-pressure medium is used as the booster power, and no external power source is required; after the high-pressure medium passes through the pipeline, the medium can be automatically pressurized.

Description

Technical Field

[0001] The invention relates to the field of hydraulic pipelines, and in particular to a telescopic self-restoring high-pressure quick connection device and an application thereof. Background Art

[0002] In the field of fluid transmission and hydraulic cutting, various pipes and joints are required to be combined into a closed medium flow pipeline. The pipe form and structure have a great influence on the flow state of the medium. Limited by the existing technology, in some non-fixed connection occasions, it is necessary to frequently disconnect and connect the pipes. At this time, the reasonable design of the pipes and quick-connect joints has a great influence on the medium flow state and pressure loss optimization.

[0003] In the process of underground emergency rescue drilling, hydraulic assisted rock crushing can improve the efficiency of rock crushing. At the same time, when the rock mass contains metal components, hydraulic cutting can assist in cutting metal components to improve drilling efficiency and buy precious time for trapped personnel. Hydraulic cutting, also known as water jet, is a high-pressure water jet cutting technology, which is a machine that uses high-pressure water flow for cutting. It is low in cost, easy to operate, and has a high yield rate. It is an effective means to improve drilling efficiency. The pipeline system, as an important part of the hydraulic cutting system, is an important factor affecting the cutting effect during the drilling process. Water cutting generally requires the addition of abrasives to high-pressure water to improve cutting efficiency. Only when the abrasives and water are evenly mixed can efficient cutting be achieved. When the water jet pipeline needs to connect multiple sections of pipelines together, high-pressure quick connectors are required. In the existing technology, due to the influence of the structure, the inner diameter of the pipeline changes at the pipeline connection. At this time, a large pressure loss is generated in the local diameter change, and the medium flow state is changed, disrupting the uniform mixing of abrasives and liquids. In addition, due to structural reasons, the existing joints are prone to rapid wear.

[0004] During the drilling rescue process, as the borehole deepens, the drill rod needs to be lengthened section by section. Generally, the water-cut high-pressure pipeline is installed in the inner hole of the drill rod. Since the drill rods are connected by threads, the threaded connection occupies a part of the axial length. During use, the high-pressure pipeline needs to be quickly connected first, and then the drill rod is connected. In the prior art, to achieve the above functions, the internal pipeline needs to be longer than the drill rod to facilitate the connection of the internal pipeline. However, in actual operation, due to the high hardness of the high-pressure pipeline and the limited size of the inner hole of the drill rod, the internal pipeline bends and wears in the inner hole of the drill rod, causing premature damage to the pipeline. During the disassembly process, due to the large elasticity of the high-pressure pipe, it is easy to cause safety accidents, thereby limiting the application of water cutting technology in rescue drilling construction.

[0005] Figure 1It is a schematic diagram of the drill rod connection process. Since the high-pressure hose 2 is in the channel inside the drill rod, during the connection process, the internal high-pressure hose 2 needs to be connected first, and then the thread between the two drill rods 4 is tightened. However, during operation, due to the operating space, the length of the high-pressure hose 2 needs to be greater than the length of the drill rod 4. But the actual situation is that the high-pressure hose 2 is a multi-layer steel wire braided hose, which is non-stretchable, so the operability is not strong.

[0006] Figure 2 It is an existing high-pressure quick connector structure. In order to realize the quick connection of the hose, a high-pressure quick connector is generally installed at the end of the hose. The high-pressure quick connector includes a male connector 7 and a female connector 8. The two top cones 9 inside the high-pressure connector push each other to realize the connection of the pipeline. The spring 10 is reset to realize the pipeline sealing after disassembly. This type of quick connector is restricted by its structure. At the connection, the pipeline flow area changes, there is local pressure loss, and the change in flow area causes local turbulence, which affects the uniform mixing of the abrasive and the high-pressure medium. All of the above will affect the water jet cutting efficiency. Summary of the invention

[0007] In order to solve the problems existing in the prior art such as difficult pipeline connection, excessive pressure loss, rapid wear of joints and safety risks during operation, the present invention provides a telescopic self-recovering high-pressure quick connection device.

[0008] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0009] A telescopic self-restoring high-pressure quick-connect device, characterized in that it is composed of an equal-diameter sealing quick-connect device, a telescopic pipeline device and a booster device; wherein:

[0010] The equal-diameter sealing quick-connect device is used to realize the quick connection and locking of the pipeline;

[0011] The telescopic pipeline device is used to extend the pipeline by a certain distance to facilitate the connection of the pipeline inside the drill pipe;

[0012] The booster device is used to realize automatic contraction of the pipeline after the high-pressure medium passes through the pipeline;

[0013] The equal-diameter sealing quick-connect device is quickly connected to the telescopic pipeline device. After the connection, the inner diameters of the equal-diameter sealing quick-connect device and the telescopic pipeline device are consistent, and the axial positioning is quickly performed after the connection.

[0014] When there is no high-pressure medium in the pipeline, the telescopic pipeline device can be extended and retracted a certain distance along the axial direction to compensate for dimensional errors or facilitate installation; when high-pressure medium passes through the pipeline, the telescopic pipeline device can automatically shrink along the axial direction to shorten the pipeline connection length;

[0015] The boosting device is coaxially installed with the telescopic pipeline device, and adopts high-pressure medium as boosting power without the need for an external power source; after the high-pressure medium passes through the pipeline, the medium can be automatically pressurized, and the output pressure is greater than the high-pressure medium pressure by a certain multiple.

[0016] According to the present invention, the equal-diameter sealing quick-connect device comprises a male connector, a female connector, a sealing gasket, a latch and a sealing ring, wherein:

[0017] The male connector is installed at the end of the telescopic pipeline device, and the female connector is installed at the end of the high-pressure hose. The male connector is provided with a positioning slot, and the female connector is provided with a pin hole. The sealing gasket is installed at the end of the male connector, and the male connector is inserted into the female connector so that the sealing gasket seals the contact end surfaces of the male connector and the female connector. The sealing ring is located at the front end of the outer diameter of the male connector to further seal the contact surfaces of the male connector and the female connector. The pin is inserted into the connected male connector and the female connector to achieve axial positioning, thereby achieving quick connection of the pipeline and the telescopic pipeline device.

[0018] Specifically, the telescopic pipeline device includes an outer sleeve, an inner sleeve, a sealing ring, a first sealing assembly and a first end cover; wherein the inner sleeve can slide axially in the outer sleeve, and the sealing ring is used to achieve sealing between the end face of the inner sleeve and the end face of the outer sleeve, and after the end face of the inner sleeve contacts the end face of the outer sleeve, the inner diameter of the pipeline remains unchanged; the first sealing assembly is a plurality of sets of high-pressure sealing assemblies to seal the movable contact surfaces between the inner sleeve and the outer sleeve, and between the inner sleeve and the end cover, and the first end cover is located at one end of the outer sleeve and is used to limit the sliding limit position of the inner sleeve.

[0019] Specifically, the outer sleeve is provided with two water inlets, the first water inlet allows high-pressure liquid to push the inner sleeve to extend, and the second water inlet allows high-pressure liquid to push the sleeve to retract.

[0020] Furthermore, the boost device includes a boost sleeve, an outer shell, a second end cover and a second sealing assembly; wherein, the boost sleeve is hinged to the inside of the outer shell, the boost sleeve can slide axially in the outer shell, the second end cover is used to limit the axial movement position of the boost sleeve, and the second sealing assembly is a plurality of sets of high-pressure sealing assemblies, which are used for sealing between the two travel cavities between the boost sleeve and the outer shell, and for sealing between the end cover and the outer sleeve.

[0021] The first sealing component and the second sealing component are selected from Sterling seals and guide rings.

[0022] The Ster seal and guide ring include two sets of high-pressure seal rings, and a guide ring is arranged between the two seal rings to ensure reliable sealing between the relative sliding components.

[0023] The two end surfaces of the booster sleeve are provided with grooves, so that when the booster sleeve moves to the extreme positions at both ends, it will not be in full contact with the end surface of the outer shell, ensuring that the booster sleeve can slide flexibly under the action of the high-pressure liquid;

[0024] The outer shell is divided into a small cavity and a large cavity, wherein the small cavity is communicated with the second water port of the outer shell of the telescopic pipeline device, and the large cavity is communicated with the first water port of the outer shell of the telescopic pipeline device.

[0025] The above-mentioned telescopic self-recovering high-pressure quick connection device can be used for connecting multiple sections of pipelines in confined spaces during underground emergency rescue drilling construction.

[0026] It is used in confined spaces to connect multiple sections of pipelines. Since there is a certain plug-in distance between the pipelines, the connecting pipeline is axially extended and retracted a certain distance in the telescopic pipeline device, and the pipeline is quickly connected and locked through the equal-diameter sealing quick-connect device; after the high-pressure medium is introduced into the high-pressure pipeline, it is automatically contracted, and the contraction power is taken from the high-pressure medium itself, and no external power is required; the booster device is coaxially installed with the telescopic pipeline device, and the inner diameter of the pipeline is consistent to avoid pipeline pressure loss; after the pipeline is contracted, the inner diameter of the pipeline is also consistent, so that the inner diameter is completely consistent when connected and used.

[0027] Compared with the prior art, the telescopic self-recovering high-voltage quick connection device of the present invention has the following advantages:

[0028] Beneficial effects:

[0029] It solves the problem of pressure loss, local turbulence and poor operability caused by the inability to achieve pipeline expansion and contraction in the existing technology and the forced connection of pipelines under inappropriate size. It is used in confined spaces for connecting multiple sections of pipelines. Since there is a certain plug-in distance between pipelines, the joint can be stretched a certain distance during the connection process. The internal pipeline is connected first, and then the external pipeline is connected. When the internal pipeline is passed through the high-pressure medium, the internal pipeline automatically contracts, which facilitates the rapid connection of the pipeline, reduces the wear of the joint thread, reduces the auxiliary time, and improves the drilling efficiency. The water joint function switching can be completed quickly by one person, which reduces the labor intensity of workers and improves the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the drill pipe connection process;

[0031] Figure 2 This is the structural diagram of the existing high-pressure quick connector;

[0032] Figure 3 It is a structural diagram of the retractable self-restoring high-voltage quick connection device of the present invention;

[0033] Figure 4 This is the structural diagram of the equal diameter sealing quick-connect device;

[0034] Figure 5 It is the structure of telescopic pipeline device and the telescopic principle diagram;

[0035] Figure 6It is the structural diagram of the supercharging device;

[0036] Figure 7 It is the structural diagram of the supercharger sleeve;

[0037] Figure 8 It is a schematic diagram of the pressurization and contraction of the telescopic self-recovering high-pressure quick-connect device.

[0038] Fig. 9 This is a schematic diagram of a specific application of the retractable self-recovering high-voltage quick connection device of the present invention;

[0039] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0040] See also Figure 3 This embodiment provides a retractable self-restoring high-pressure quick-connect device, which is composed of an equal-diameter sealing quick-connect device 3a, a retractable pipeline device 3b, and a booster device 3c; wherein:

[0041] The equal-diameter sealing quick-connect device 3a is used to realize the quick connection and locking of the high-pressure pipeline;

[0042] The telescopic pipeline device 3b is used to extend the pipeline by a certain distance to facilitate the connection of the pipeline inside the drill pipe;

[0043] The boosting device 3c is used to realize automatic contraction of the pipeline after the high-pressure medium passes through the pipeline.

[0044] The equal-diameter sealing quick-connect device 3a is quickly connected to the telescopic pipeline device 3b. After the connection, the inner diameters of the equal-diameter sealing quick-connect device 3a and the telescopic pipeline device 3b are consistent, and the axial positioning is quickly performed after the connection;

[0045] When there is no high-pressure medium in the pipeline, the telescopic pipeline device 3b can be extended and retracted a certain distance along the axial direction to compensate for the size error or facilitate installation; when the high-pressure medium passes through the pipeline, the telescopic pipeline device 3b can automatically shrink along the axial direction to shorten the pipeline connection length;

[0046] The boosting device 3c is coaxially installed with the telescopic pipeline device 3b, and uses high-pressure medium as the boosting power without the need for an external power source; after the high-pressure medium passes through the pipeline, the medium can be automatically pressurized, and the output pressure is greater than the high-pressure medium pressure by a certain multiple.

[0047] See also Figure 4 The equal-diameter sealing quick-connect device 3a includes a male connector 3a1, a female connector 3a2, a sealing gasket 3a3, a latch pin 3a4 and a sealing ring 3a5.

[0048] Among them, the male connector 3a1 is installed at the end of the telescopic pipeline device 3b, the female connector 3a2 is installed at the end of the high-pressure hose, the male connector 3a1 is provided with a positioning slot, the female connector 3a2 is provided with a pin hole, the sealing gasket 3a3 is installed at the end of the male connector 3a1, the male connector 3a1 is inserted into the female connector 3a2, so that the sealing gasket 3a3 seals the contact end surface of the male connector 3a1 and the female connector 3a2; the sealing ring 3a5 is located at the front end of the outer diameter of the male connector 3a1, further sealing the contact surface of the male connector 3a1 and the female connector 3a2, the pin 3a4 is inserted from the pin hole of the female connector 3a2, and passes through the positioning slot with the male connector 3a1, realizing axial positioning, and realizing the rapid connection of the pipeline with the telescopic pipeline device 3b. This structure can realize the rapid connection of the pipeline on the one hand, and on the other hand, due to the optimized structural design, the inner diameter of the pipeline is consistent after the connection, thereby avoiding pressure loss and turbulence.

[0049] See also Figure 5 , Figure 5 The telescopic pipeline device 3b is a structure and telescopic principle diagram, and the telescopic pipeline device 3b includes an outer sleeve 3b1, an inner sleeve 3b2, a sealing ring 3b3, a first sealing assembly 3b4 and a first end cover 3b5. The inner sleeve 3b2 can slide axially on the outer sleeve 3b1 for a certain distance to achieve the telescopic length of the joint.

[0050] In specific applications, the length of the inner sleeve 3b2 axis and the inner hole of the outer sleeve 3b1 can be adjusted according to the telescopic length requirements. The sealing ring 3b3 can achieve the sealing between the inner sleeve 3b2 and the end face of the outer sleeve 3b1. After the inner sleeve 3b2 and the outer sleeve 3b1 are in contact, the inner diameter of the pipeline remains unchanged. In this embodiment, the sealing ring 3b3 selects an elastic seal. When the inner sleeve 3b2 is retracted, the axis between the inner sleeve 3b2 and the outer sleeve 3b1 is sealed, and the inner pipeline is sealed to avoid pressure loss during the flow process. A large chamfer is set on the end face of the inner sleeve 3b2 to prevent the inner sleeve 3b2 from being unable to retract when the inner sleeve 3b2 reaches the end of the stroke. A second joint body is set at the end of the inner sleeve 3b2, which is connected to the first joint body of the high-pressure pipeline, and can be further connected to the extended pipeline.

[0051] The first sealing assembly 3b4 is a plurality of high-pressure sealing assemblies to seal the moving contact surfaces between the inner sleeve 3b2 and the outer sleeve 3b1, and between the inner sleeve 3b2 and the first end cover 3b5. The first end cover 3b5 is located at one end of the outer sleeve 3b1 and can limit the sliding limit position of the inner sleeve 3b2.

[0052] In this embodiment, the first sealing component 3b4 is a Sterling seal and a guide ring, which comprises two sets of high-pressure sealing rings, and a guide ring is arranged between the two sealing rings to ensure reliable sealing between the relative sliding components.

[0053] Please continue to refer to the telescopic principle of the telescopic pipe device 3b. Figure 5 . Figure 5It can be seen from the three figures from top to bottom that after the joint is extended, due to the influence of the structure, when the inner sleeve 3b2 is not completely retracted in the outer sleeve (3b1), the flow area changes will occur on the end faces of the inner sleeve 3b2 and the outer sleeve 3b1.

[0054] See also Figure 6 The boost device 3c includes a boost sleeve 3c1, an outer shell 3c2, a second end cover 3c3 and a second sealing assembly 3c4. The boost sleeve 3c1 is hinged to the inner part of the outer shell 3c2, and the boost sleeve 3c1 can slide axially in the outer shell 3c2. The second end cover 3c3 can limit the axial movement position of the boost sleeve 3c1. The second sealing assembly 3c4 is a plurality of sets of high-pressure sealing assemblies. In this embodiment, the second sealing assembly 3c4 is also preferably a Ster seal and a guide ring, which can seal the travel cavity between the boost sleeve 3c1 and the outer shell 3c2, and seal the end cover 3c3 and the outer sleeve 3b1.

[0055] The outer shell 3c2 is divided into a small cavity and a large cavity, wherein the small cavity is communicated with the second water port of the outer shell 3b1 of the telescopic pipeline device 3b, and the large cavity is communicated with the first water port of the outer shell 3b1 of the telescopic pipeline device 3b.

[0056] See also Figure 7 The structure diagram of the booster sleeve (3c1) is shown. Grooves are arranged on the two end faces of the booster sleeve (3c1). When the booster sleeve (3c1) moves to the extreme positions at both ends, it will not completely contact the end faces of the outer shell, thereby ensuring that the booster sleeve (3c1) can slide flexibly under the action of high-pressure liquid.

[0057] See also Figure 8 , Figure 8 This is a schematic diagram of the pressurization and contraction of the telescopic self-recovering high-pressure quick connection device of this embodiment. It can be seen from the three figures from top to bottom that when high-pressure liquid is passed into the pipeline, the high-pressure liquid flows through the channel set in the outer sleeve 3b1 and enters the two cavities in front and behind the pressurization sleeve 3c1. Under the action of the area difference between the two cavities, the liquid in the small area cavity in the small cavity is pressurized. At this time, the liquid pressure acts on the rod cavity of the inner sleeve 3b2. By optimizing the design of the area ratio of the two cavities of the pressurization sleeve 3c1 and the area ratio of the rod cavity and the rodless cavity of the inner sleeve 3b2, the thrust generated by the high-pressure liquid in the rod cavity of the inner sleeve 3b2 is greater than the thrust generated by the rodless cavity of the inner sleeve 3b2, pushing the inner sleeve 3b2 to contract in the outer sleeve 3b1. This design can prevent the telescopic structure from extending due to the area difference between the rod cavity and the rodless cavity of the inner sleeve 3b2 once the high-pressure medium is passed. The medium itself is used as the contraction power, and no external power is required. The structure is simple and the contraction is reliable.

[0058] According to the applicant's experiments, the telescopic self-restoring high-pressure quick connection device of this embodiment can be used for connecting multiple sections of pipelines in confined spaces during underground emergency rescue drilling construction.

[0059] It is used in confined spaces where multiple sections of pipelines are connected. Since there is a certain plug-in distance between the pipelines, the connecting pipeline is axially extended and retracted a certain distance in the telescopic pipeline device, and the pipeline is quickly connected and locked through the equal-diameter sealing quick-connect device; after the high-pressure medium is introduced into the high-pressure pipeline, it can automatically shrink, and the shrinkage power is taken from the high-pressure medium itself, and no external power is required; the booster device is coaxially installed with the telescopic pipeline device, and the inner diameter of the pipeline is consistent to avoid pipeline pressure loss; after the pipeline is shrunk, the inner diameter of the pipeline is also consistent, so that the inner diameter is completely consistent when connected. During the connection process, the joint can be stretched a certain distance, and the internal pipeline is connected first, and then the external pipeline is connected. When the high-pressure medium is introduced into the internal pipeline, the inner pipeline automatically shrinks, which is convenient for pipeline connection.

[0060] During the pipeline connection process, the pipeline can be expanded or contracted to a certain length according to actual use needs to facilitate the connection between pipelines, while reducing the requirements for pipeline length processing accuracy and better ensuring sealing; a pressurized self-contracting structure is adopted, and the pipeline can be contracted when high-pressure liquid is introduced to prevent bending in the inner hole of the drill bit due to the length of the pipeline; the contraction structure uses the liquid pressure in the pipeline to achieve self-contraction of the pipeline, and does not require an auxiliary power head source, thereby reducing system configuration and simplifying the device structure. When the telescopic self-recovering high-pressure quick connection device is in a contracted state, it can ensure that all connection positions in the inner hole of the pipeline have the same diameter, and can avoid turbulence and pressure loss caused by local diameter changes.

[0061] See also Fig. 9 , Fig. 9 The specific application of the retractable self-restoring high-pressure quick connection device of this embodiment is given. The whole set of drilling tools includes a drill bit 1, a high-pressure hose 2, a retractable self-restoring high-pressure quick connection device 3 of this embodiment, a drill rod 4, a rotator 5, and a high-pressure water joint 6. In use, the rotator 5 drives the drill rod 4 to rotate, driving the drill bit 1 to rotate and crush rocks. As the borehole deepens, it is necessary to continuously connect the drill rod 4. In order to solve the problem of hard rocks or hard and difficult-to-crush objects such as anchor cables during drilling, high-pressure water jets can be used to assist in rock crushing. The basic process is to pass high-pressure fluid through the high-pressure water joint 6, add abrasives to the high-pressure fluid, form a high-pressure solid-liquid two-phase flow, and send it to the water outlet of the drill bit through the high-pressure hose in the drill rod to perform water cutting to assist in rock crushing, so as to improve drilling efficiency. Since the drill rod needs to be continuously connected during use, the high-pressure hose also needs to be connected in sections.

[0062] In summary, the retractable self-restoring high-pressure connecting device of the present embodiment solves the problem that the prior art cannot achieve natural extension when the pipeline is connected and cannot automatically shrink after the high-pressure medium is introduced. It can facilitate the convenient, reliable and quick connection of pipelines in confined spaces. At the same time, the equal-diameter design of the inner channel avoids the pressure loss and turbulence caused by the change of the flow area of ​​the existing quick connecting device, and the equal-diameter design can avoid the problem of excessive wear of the sealing surface of the joint by the high-pressure medium with added abrasives.

[0063] The above embodiments are only preferred examples of the present invention, which are used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of protection requested by the claims of this application.

Claims

1. A telescopic self-recovering high-voltage quick-connect device, It is characterized in that It consists of an equal-diameter sealing quick-connect device, a telescopic pipeline device and a booster device; among which: The equal-diameter sealing quick-connect device is used to realize the quick connection and locking of the pipeline; The telescopic pipeline device is used to extend the pipeline by a certain distance to facilitate the connection of the pipeline inside the drill pipe; The booster device is used to realize automatic contraction of the pipeline after the high-pressure medium passes through the pipeline; The equal-diameter sealing quick-connect device is quickly connected to the telescopic pipeline device. After the connection, the inner diameters of the equal-diameter sealing quick-connect device and the telescopic pipeline device are consistent, and the axial positioning is quickly performed after the connection. When there is no high-pressure medium in the pipeline, the telescopic pipeline device can be extended and retracted a certain distance along the axial direction to compensate for dimensional errors or facilitate installation; when high-pressure medium passes through the pipeline, the telescopic pipeline device can automatically shrink along the axial direction to shorten the pipeline connection length; The boosting device is coaxially installed with the telescopic pipeline device, and adopts high-pressure medium as boosting power without the need for an external power source; after the high-pressure medium passes through the pipeline, the medium can be automatically pressurized, and the output pressure is greater than the high-pressure medium pressure by a certain multiple.

2. The telescopic self-restoring high-voltage quick connection device according to claim 1, It is characterized in that The equal-diameter sealing quick-connect device comprises a male connector, a female connector, a sealing gasket, a latch and a sealing ring, wherein: The male connector is installed at the end of the telescopic pipeline device, and the female connector is installed at the end of the high-pressure hose. The male connector is provided with a positioning slot, and the female connector is provided with a pin hole. The sealing gasket is installed at the end of the male connector, and the male connector is inserted into the female connector so that the sealing gasket seals the contact end surfaces of the male connector and the female connector. The sealing ring is located at the front end of the outer diameter of the male connector to further seal the contact surfaces of the male connector and the female connector. The pin is inserted into the connected male connector and the female connector to achieve axial positioning, thereby achieving quick connection of the pipeline and the telescopic pipeline device.

3. The telescopic self-restoring high-voltage quick connection device according to claim 1, It is characterized in that The telescopic pipeline device includes an outer sleeve, an inner sleeve, a sealing ring, a first sealing component and a first end cover; wherein the inner sleeve can slide axially in the outer sleeve, and the sealing ring is used to achieve sealing between the end face of the inner sleeve and the end face of the outer sleeve, and after the end face of the inner sleeve contacts the end face of the outer sleeve, the inner diameter of the pipeline remains unchanged; the first sealing component is a plurality of sets of high-pressure sealing components to seal the movable contact surfaces between the inner sleeve and the outer sleeve, and between the inner sleeve and the end cover, and the first end cover is located at one end of the outer sleeve and is used to limit the sliding limit position of the inner sleeve.

4. The telescopic self-restoring high-voltage quick connection device according to claim 3, It is characterized in that The outer sleeve is provided with two water inlets, the first water inlet admits high-pressure liquid to push the inner sleeve to extend, and the second water inlet admits high-pressure liquid to push the sleeve to retract.

5. The telescopic self-restoring high-voltage quick connection device according to claim 1, It is characterized in that The boost device includes a boost sleeve, an outer shell, a second end cover and a second sealing assembly; wherein the boost sleeve is hinged to the inside of the outer shell, the boost sleeve can slide axially within the outer shell, the second end cover is used to limit the axial movement position of the boost sleeve, and the second sealing assembly is a plurality of sets of high-pressure sealing assemblies, which are used for sealing between the two travel cavities between the boost sleeve and the outer shell, and for sealing between the end cover and the outer sleeve.

6. The telescopic self-restoring high-voltage quick connection device according to claim 3 or 5, It is characterized in that The first sealing component and the second sealing component are selected from Sterling seals and guide rings.

7. The telescopic self-restoring high-voltage quick connection device according to claim 6, It is characterized in that The Ster seal and guide ring include two sets of high-pressure seal rings, and a guide ring is arranged between the two seal rings to ensure reliable sealing between the relative sliding components.

8. The telescopic self-restoring high-voltage quick connection device according to claim 5, It is characterized in that The two end surfaces of the booster sleeve are provided with grooves, so that when the booster sleeve moves to the extreme positions at both ends, it will not be in full contact with the end surface of the outer shell, ensuring that the booster sleeve can slide flexibly under the action of the high-pressure liquid; The outer shell is divided into a small cavity and a large cavity, wherein the small cavity is communicated with the second water port of the outer shell of the telescopic pipeline device, and the large cavity is communicated with the first water port of the outer shell of the telescopic pipeline device.

9. An application of connecting multiple sections of pipes in confined spaces during underground emergency rescue drilling construction. It is characterized in that The application uses the telescopic self-recovering high-voltage quick connection device as described in any one of claims 1-8.

10. The use according to claim 9, It is characterized in that It is used in confined spaces to connect multiple sections of pipelines. Since there is a certain plug-in distance between the pipelines, the connecting pipeline is axially extended and retracted a certain distance in the telescopic pipeline device, and the pipeline is quickly connected and locked through the equal-diameter sealing quick-connect device; after the high-pressure medium is introduced into the high-pressure pipeline, it is automatically contracted, and the contraction power is taken from the high-pressure medium itself, and no external power is required; the booster device is coaxially installed with the telescopic pipeline device, and the inner diameter of the pipeline is consistent to avoid pipeline pressure loss; after the pipeline is contracted, the inner diameter of the pipeline is also consistent, so that the inner diameter is completely consistent when connected and used.

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