Hole sealing device, hole sealing system and hole sealing method

Abstract

The invention provides a hole sealing device, a hole sealing system and a hole sealing method. The hole sealing device comprises a pipeline, an elastic shell and a switch component. A water inlet, a water outlet, a pressure inlet and a pressure outlet are formed in the pipe wall of the pipeline; a first flow channel and a second flow channel are formed in the pipe wall; the water inlet and the pressure inlet are both communicated with the first flow channel, and the water outlet and the pressure outlet are both communicated with the second flow channel. The elastic shell is arranged on the outer side of the pipeline in a sleeving mode, in the expansion state, a water filling gap is formed between the elastic shell and the pipeline, and the elastic shell is used for abutting against the inner wall of a drill hole so as to seal the drill hole; the pressure inlet communicates with the water filling gap and the first flow channel, and the pressure discharge port communicates with the water filling gap and the second flow channel. The switch component is arranged at the water outlet and used for opening or blocking the water outlet; and when the water pressure in the water filling gap is greater than the plugging force of the switch component on the water outlet, the switch component opens the water outlet, so that water in the second flow channel flows into the drill hole from the water outlet. According to the invention, water injection and hole sealing of the drill hole can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of mine geological exploration and geophysical detection, and in particular to a hole sealing device, a hole sealing system and a hole sealing method. Background Art

[0002] In geophysical exploration, a well logging instrument is a device commonly used in the field of geological exploration. It can detect the physical properties and chemical composition of underground materials and transmit the data to the ground for processing and analysis. It can be used to study the structure of the earth's crust, find mineral resources and groundwater, and monitor environmental changes. Common well logging instruments include sonic logging instruments, electrical logging instruments, and radioactive logging instruments. They each have different functions and application ranges, but they all exist to more accurately understand the underground situation.

[0003] Acoustic logging uses the propagation speed and time of sound waves in the medium to obtain formation information. Because the sound wave signal is easily affected by factors such as air density, temperature and pressure when propagating in the air, the measurement results are not accurate. In water, the propagation speed of sound waves is relatively fast and is less affected by environmental factors. Therefore, acoustic logging in water can obtain more accurate formation information. Therefore, acoustic logging is usually used in a sealed water environment to ensure the accurate propagation of the sound wave signal and the reliability of the measurement results. In addition, the sealed water environment can also ensure that the measurement process will not be disturbed by external environmental factors, such as water flow, bubbles, etc.

[0004] In short, the sonic logging instrument needs to be used in a sealed water environment to ensure the accuracy and reliability of the measurement results.

[0005] Well logging instruments are widely used in the oil industry, but since oil well logging is used in vertically downward boreholes, it is only necessary to fill the borehole with liquid when the well logging instrument is measuring, so that the acoustic well logging instrument is in a liquid water environment, and there is no problem of sealing the hole. However, in order to use the acoustic well logging instrument in coal mine lanes or tunnels to measure parameters such as the lithology and structure of the surrounding rock mass, it is necessary to drill vertically upward, inclined upward or horizontally in the roof or sides of the lane (or tunnel), and then place the acoustic well logging instrument therein and fill it with liquid, which requires consideration of the problem of sealing the hole. In order to solve the problem of sealing the hole when the acoustic well logging instrument is used in the sides and roof of the lane or tunnel, the present invention provides a sealing device and a sealing method. Summary of the invention

[0006] The present invention provides a hole sealing device, a hole sealing system and a hole sealing method, which are used to solve at least one technical problem existing in the prior art.

[0007] The present invention provides a sealing device, comprising: A pipe, wherein an assembly cavity with two ends opened is formed inside along the axial direction of the pipe; a water inlet, a drain outlet, a pressure inlet and a pressure outlet are formed on the pipe wall of the pipe; a first flow channel and a second flow channel are formed in the pipe wall; the first flow channel and the second flow channel are arranged at intervals along the axial direction; the water inlet and the pressure inlet are both connected to the first flow channel, and the drain outlet and the pressure outlet are both connected to the second flow channel; an elastic shell, which is sleeved on the outside of the pipeline, and has an expanded state and a contracted state; in the expanded state, the elastic shell and the pipeline form a water-filled gap, and the elastic shell is used to abut against the inner wall of the borehole to seal the borehole; the pressure inlet is connected to the water-filled gap and the first flow channel, and the pressure outlet is connected to the water-filled gap and the second flow channel; A switch component is arranged at the drain outlet and is used to open or block the drain outlet; when the water pressure in the water-filled gap is greater than the blocking force of the switch component on the drain outlet, the switch component opens the drain outlet to allow the water in the second flow channel to flow from the drain outlet into the borehole.

[0008] According to the sealing device provided by the present invention, the elastic shell comprises: An elastic sleeve assembly is sleeved on the outside of the pipeline, and the proximal end of the elastic sleeve assembly close to the water inlet is connected to the pipeline; the elastic sleeve assembly has the expanded state and the contracted state; A sealing ring is sleeved on the outer side of the pipeline; the far end of the elastic sleeve assembly away from the water inlet is axially slidably matched with the pipeline through the sealing ring.

[0009] According to the sealing device provided by the present invention, the elastic sleeve assembly comprises: An elastic sleeve, which is sleeved on the outside of the pipe and has the expansion state and the contraction state; A first fastener, disposed at the proximal end of the elastic sleeve, for connecting the proximal end of the elastic sleeve to the pipeline; A second fastener is disposed at the distal end of the elastic sleeve and is used to connect the elastic sleeve to the sealing ring.

[0010] According to the sealing device provided by the present invention, a limiting protrusion is formed on the outer side surface of the pipe, and the limiting protrusion is located between the pressure discharge port and the water outlet and close to the pressure discharge port.

[0011] According to the sealing device provided by the present invention, the switch component comprises: A switch assembly, disposed at the drain outlet, for opening or blocking the drain outlet; A pressure regulating component is connected to the switch component. The pressure regulating component has the blocking force and is used to press the switch component toward the drain outlet to block the drain outlet. The pressure regulating component can adjust the size of the blocking force.

[0012] According to the sealing device provided by the present invention, the pressure regulating component comprises: an elastic member connected to the switch assembly; A top screw cooperates with the pipe thread, and the top screw presses the switch assembly toward the drain port by squeezing the elastic member.

[0013] According to the sealing device provided by the present invention, the pipeline comprises: An inner tube, wherein the assembly cavity with two ends open is formed inside along the axial direction; A first outer tube is sleeved on the outer side of the inner tube to form the first flow channel with the inner tube; the water inlet and the pressure inlet are formed on the wall of the first outer tube; The second outer tube is sleeved on the outer side of the inner tube and arranged along the axial direction with the first outer tube. The second flow channel is formed between the second outer tube and the inner tube. The tube wall of the second outer tube is provided with the pressure discharge port and the water discharge port.

[0014] According to the sealing device provided by the present invention, the inner tube includes multiple sections of tube bodies, and the multiple sections of the tube bodies are detachably connected.

[0015] A second aspect of the present invention provides a sealing system, comprising a pushing device and any one of the sealing devices described above, wherein the pushing device is sealingly assembled in an assembly cavity of the sealing device.

[0016] The present invention provides a sealing method, which adopts the sealing system described above; the sealing method comprises: Placing a sealing device in the borehole; sealingly assembling a pushing device equipped with a testing instrument in the assembly cavity of the sealing device, so that the testing instrument enters the target depth of the borehole; Water is injected into the water inlet to expand the elastic shell until it abuts against the inner wall of the borehole, and at the same time the borehole is filled with water to ensure that the test instrument is in a liquid environment.

[0017] The hole sealing device provided by the present invention is provided with a pipeline, an elastic shell and a switch component. When in use, the hole sealing device is placed in the borehole, and an external water source is injected from the water inlet. The water flows through the first flow channel and the pressure inlet in sequence and flows into the water-filled gap between the elastic shell and the pipeline, so that the elastic shell changes from a contracted state to an expanded state. The elastic shell in the expanded state can abut against the hole wall of the borehole to seal the borehole. At the same time, the water flows into the second flow channel through the pressure discharge port and flows into the drain port to squeeze the switch component. When the water pressure in the water-filled gap, that is, the squeezing force of the water on the switch component is greater than the sealing force of the switch component on the drain port, the switch component is squeezed open and the drain port is opened. At this time, water flows into the borehole from the drain port to achieve water injection into the borehole. In other words, the hole sealing device of the present invention can not only seal the borehole but also inject water into the borehole.

[0018] The sealing system provided by the present invention includes the above-mentioned sealing device, and thus has at least the above-mentioned advantages.

[0019] The hole sealing method provided by the present invention adopts the hole sealing system, so the drilled hole can be sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the sealing device provided by the present invention.

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the sealing device provided by the present invention.

[0023] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0025] Figure 5 It is a schematic diagram of the assembly structure of the elastic shell and the pipeline of the sealing device provided by the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the pipeline of the sealing device provided by the present invention.

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of a pipeline of the sealing device provided by the present invention.

[0028] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the sealing system provided by the present invention.

[0030] Fig.10 It is a schematic flow chart of the sealing method provided by the present invention.

[0031] Fig.11 It is a structural schematic diagram of the pushing device provided by the present invention.

[0032] Fig.12 yes Fig.11 Schematic diagram of the structure of the AA section.

[0033] Fig.13 It is a schematic diagram of the structure of the first splicing unit of the pushing device provided by the present invention.

[0034] Fig.14 It is a structural schematic diagram of the second splicing unit of the pushing device provided by the present invention.

[0035] Fig.15 It is a structural schematic diagram of the fastening structure of the pushing device provided by the present invention.

[0036] Fig.16 It is a structural schematic diagram of a guide rod joint of a pushing device provided by the present invention.

[0037] Fig.17 It is a schematic diagram of the assembly structure of the first connecting joint and the guide rod joint of the pushing device provided by the present invention.

[0038] Fig.18 yes Fig.17 Schematic diagram of the structure of the BB section. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 4 As shown, a specific embodiment of the first aspect of the present invention provides a sealing device 10. The sealing device 10 includes a pipe 100, an elastic shell 200 and a switch component 300; Among them, an assembly cavity 101 with two ends opened is formed inside the pipeline 100 along the axial direction of the pipeline 100; the pipe wall of the pipeline 100 is provided with a water inlet 104, a water outlet 107, a pressure inlet 105 and a pressure discharge port 106; a first flow channel 102 and a second flow channel 103 are formed in the pipe wall; the first flow channel 102 and the second flow channel 103 are arranged at intervals along the axial direction of the pipeline 100; the water inlet 104 and the pressure inlet 105 are both connected to the first flow channel 102, and the water outlet 107 and the pressure discharge port 106 are both connected to the second flow channel 103.

[0041] The elastic shell 200 is sleeved on the outside of the pipeline 100, and the elastic shell 200 has an expanded state and a contracted state; in the expanded state, the elastic shell 200 and the pipeline 100 form a water-filled gap, and the elastic shell 200 is used to abut against the inner wall of the drilled hole to seal the drilled hole; the pressure inlet 105 connects the water-filled gap and the first flow channel 102, and the pressure discharge port 106 connects the water-filled gap and the second flow channel 103.

[0042] The switch component 300 is arranged at the drain outlet 107, and is used to open or block the drain outlet 107; when the water pressure in the water-filled gap is greater than the blocking force of the switch component 300 on the drain outlet 107, the switch component 300 opens the drain outlet 107, so that the water in the second flow channel 103 flows from the drain outlet 107 into the drill hole.

[0043] In this embodiment, by setting the pipeline 100, the elastic shell 200 and the switch component 300, when in use, the sealing device 10 is placed in the borehole, and the external water source is injected from the water inlet 104. The water flows through the first flow channel 102 and the pressure inlet 105 in sequence and flows into the water-filled gap between the elastic shell 200 and the pipeline 100, so that the elastic shell 200 changes from a contracted state to an expanded state. The elastic shell 200 in the expanded state can abut against the hole wall of the borehole to seal the borehole. At the same time, the water flows into the second flow channel 103 through the pressure discharge port 106, and flows into the drain port 107 to squeeze the switch component 300. When the water pressure in the water-filled gap, that is, the squeezing force of the water on the switch component 310 is greater than the blocking force of the switch component 300 on the drain port 107, the switch component 300 is squeezed open, and the drain port 107 is opened. At this time, water flows into the borehole from the drain port 107 to achieve water injection into the borehole.

[0044] When the injection of water into the water inlet 104 stops, the water in the sealing device 10 flows out from the water inlet 104, and the elastic shell 200 returns to the contracted state.

[0045] It should be noted that the drilling hole in this embodiment is preferably a vertically upward drilling hole, an inclined upward drilling hole or a horizontal drilling hole in a coal mine lane or tunnel.

[0046] like Figure 2 and Figure 3As shown, in this embodiment, the first flow channel 102 and the second flow channel 103 are arranged axially at intervals along the pipeline 100, which means that the distal end of the first flow channel 102 and the proximal end of the second flow channel 103 are divided in the middle, that is, the distal end of the first flow channel 102 is closed and the proximal end of the second flow channel 103 is closed.

[0047] It should be noted that the distal end refers to the end of the sealing device 10 that is farther away from the operator when the borehole is sealed; the proximal end refers to the end of the sealing device 10 that is closer to the operator when the borehole is sealed.

[0048] like Figure 6 As shown, in some embodiments, a limiting groove 140 is formed on the outer side of the pipe 100 , and the elastic shell 200 is limited in the limiting groove 140 .

[0049] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the pipeline 100 includes an inner tube 110 , a first outer tube 120 , and a second outer tube 130 .

[0050] Among them, the inner tube 110 is provided with an assembly cavity 101 with both ends opened in the axial direction; the first outer tube 120 is sleeved on the outer side of the inner tube 110, and a first flow channel 102 is formed between the first outer tube 120 and the inner tube 110; the tube wall of the first outer tube 120 is provided with a water inlet 104 and a pressure inlet 105. The second outer tube 130 is sleeved on the outer side of the inner tube 110, and is arranged in the axial direction with the first outer tube 120, and a second flow channel 103 is formed between the second outer tube 130 and the inner tube 110, and a pressure outlet 106 and a water outlet 107 are provided on the tube wall of the second outer tube 130. By providing the inner tube 110, a test instrument or the like can be sent into the borehole, and by providing the first outer tube 120 and the second outer tube 130, the first flow channel 102 and the second flow channel 103 can be formed conveniently. Compared with the solution of integrally forming the pipeline 100, the split structure of this embodiment is convenient for processing.

[0051] Specifically, the proximal end of the first outer tube 120 is welded to the inner tube 110, and the distal end of the first outer tube 120 is also welded to the inner tube 110, so that the first flow channel 102 is formed between the middle section of the first outer tube 120 and the inner tube 110. Preferably, the first flow channel 102 is an annular flow channel.

[0052] Specifically, the proximal end of the second outer tube 130 is welded to the inner tube 110, and the distal end of the second outer tube 130 is welded to the inner tube 110, so that the second flow channel 103 is formed between the middle section of the second outer tube 130 and the inner tube 110. Preferably, the second flow channel 103 is an annular flow channel.

[0053] In some implementations, the inner tube 110 includes multiple sections of tube bodies, which are detachably connected. When the distal tube body is blocked and damaged, the proximal tube body can be removed and the proximal tube body can continue to be used, thereby avoiding material waste and reducing costs.

[0054] Specifically, the inner tube 110 includes a first tube body 111 and a second tube body 112. The distal end of the outer side of the first tube body 111 has an internal thread, and the proximal end of the outer side of the second tube body 112 has an external thread. The first tube body 111 and the second tube body 112 are threadedly connected through external threads and internal threads.

[0055] Furthermore, in order to improve the sealing effect, a first sealing ring is provided at the distal end of the external thread. When the first tube body 111 and the second tube body 112 are threadedly connected together, the first tube body 111 squeezes the first sealing ring.

[0056] Specifically, a first limiting groove 121 is formed at the proximal end of the outer side surface of the first outer tube 120 , and the first limiting groove 121 is connected to the proximal end of the elastic shell 200 in a limiting and sealing manner.

[0057] Specifically, a limiting protrusion 131 is formed on the outer side surface of the second outer tube 130 near the pressure discharge port 106 .

[0058] Specifically, a second limiting groove (not shown in the figure) is formed on the inner side wall of the second tube body 112, and a second sealing ring (not shown in the figure) is arranged in the second limiting groove. When the pushing device 20 is sealed and assembled in the assembly cavity 101, the outer side wall of the pushing device 20 squeezes the second sealing ring to improve the sealing effect.

[0059] In some embodiments, the proximal end of the elastic shell 200 is fixedly connected to the proximal end of the first outer tube 120, and the distal end of the elastic shell 200 is fixedly connected to the distal end of the second outer tube 130. Water enters the first flow channel 102 from the water inlet 104, and the water in the first flow channel 102 enters the water-filled gap between the elastic shell 200 and the pipeline 100 from the pressure inlet hole. The proximal end of the elastic shell 200 and the distal end of the elastic shell 200 are both fixed and unchanged, and the shell wall of the elastic shell 200 becomes thinner due to expansion.

[0060] In some other embodiments, the proximal end of the elastic shell 200 is fixedly connected to the proximal end of the first outer tube 120, and the distal end of the elastic shell 200 is axially slidably matched with the distal end of the second outer tube 130. When the water in the first flow channel 102 enters the water-filled gap between the elastic shell 200 and the pipeline 100 from the pressure inlet hole, the distal end of the elastic shell 200 moves toward the proximal end of the elastic shell 200, and the elastic shell 200 expands at the same time, and the elastic shell 200 appears to be shortened and expanded.

[0061] like Figure 5As shown, further, the elastic housing 200 includes an elastic sleeve assembly 210 and a sealing ring 220. The elastic sleeve assembly 210 is sleeved on the outside of the pipeline 100, and the proximal end of the elastic sleeve assembly 210 near the water inlet 104 is connected to the pipeline 100; the elastic sleeve assembly 210 has an expanded state and a contracted state. The sealing ring 220 is sleeved on the outside of the pipeline 100; the distal end of the elastic sleeve assembly 210 away from the water inlet 104 is axially slidably matched with the pipeline 100 through the sealing ring 220. Specifically, the proximal end of the inner side wall of the elastic sleeve assembly 210 near the water inlet 104 is connected to the first outer tube 120, and the sealing ring 220 is sleeved on the distal end of the outer side surface of the second outer tube 130, and is axially slidably matched with the second outer tube 130; the outer side surface of the sealing ring 220 is connected to the distal end of the inner side wall of the elastic sleeve assembly 210 away from the water inlet 104. The water in the first flow channel 102 enters the water-filled gap between the elastic sleeve assembly 210 and the pipeline 100 through the pressure inlet 105, and the elastic sleeve assembly 210 changes from a contracted state to an expanded state. At the same time, the elastic sleeve assembly 210 pulls the sealing ring 220 to move the sealing ring 220 toward the water inlet 104.

[0062] like Figure 3 and Figure 8 As shown, in some embodiments, a limiting protrusion 131 is formed on the outer side of the pipe 100, and the limiting protrusion 131 is located between the pressure discharge port 106 and the water discharge port 107, and is close to the pressure discharge port 106. The sealing ring 220 is limited by the limiting protrusion 131, which limits the maximum movement distance of the sealing ring 220 and prevents the sealing ring 220 from blocking the pressure discharge port 106.

[0063] like Figure 5 As shown, further, the elastic sleeve assembly 210 includes an elastic sleeve 211 , a first fastener 212 and a second fastener 213 .

[0064] The elastic sleeve 211 is sleeved on the outside of the pipeline 100 and has an expanded state and a contracted state. The first fastener 212 is arranged at the proximal end of the elastic sleeve 211, and is used to connect the elastic sleeve 211 with the pipeline 100. The second fastener 213 is arranged at the distal end of the elastic sleeve 211, and is used to connect the elastic sleeve 211 with the sealing ring 220. The arrangement of the first fastener 212 and the second fastener 213 enables the proximal end and the distal end of the elastic sleeve 211 to be sealed with the pipeline 100.

[0065] Preferably, the first fastener 212 includes but is not limited to a clamp. Preferably, the second fastener 213 includes but is not limited to a clamp.

[0066] Furthermore, a third sealing ring 230 is provided between the sealing ring 220 and the pipeline 100. The third sealing ring 230 can not only improve the sealing performance between the sealing ring 220 and the pipeline 100, but also reduce the contact area between the sealing ring 220 and the pipeline 100, reduce the sliding friction resistance, and enable the sealing ring 220 to more smoothly drive the distal end of the elastic sleeve 211 to approach the proximal end when the elastic sleeve 211 expands.

[0067] like Figure 2 and Figure 4 As shown, in some embodiments, the switch component 300 includes a switch assembly 310 and a pressure regulating assembly 320. The switch assembly 310 is disposed at the drain port 107, and is used to open or block the drain port 107. The pressure regulating assembly 320 is connected to the switch assembly 310, and the pressure regulating assembly 320 has a blocking force, which is used to press the switch assembly 310 toward the drain port 107 to block the drain port 107; the pressure regulating assembly 320 can adjust the magnitude of the blocking force. Through the pressure regulating assembly 320, not only can the switch assembly 310 be pressed toward the drain port 107 to block the drain port 107, but also the maximum expansion degree of the elastic housing 200 can be adjusted by adjusting the magnitude of the blocking force, so as to be suitable for blocking drilled holes of different aperture sizes.

[0068] Furthermore, the switch assembly 310 includes a sealing member 311 and a sealing gasket 312; the sealing gasket 312 is arranged around the drain outlet 107, and the sealing member 311 is connected to the pressure regulating assembly 320; when the sealing member 311 blocks the drain outlet 107, the sealing member 311 squeezes the sealing gasket 312 to improve the sealing effect and prevent the drain outlet 107 from leaking.

[0069] Furthermore, the pressure regulating assembly 320 includes an elastic member 321 and a top screw 322. The elastic member 321 is connected to the switch assembly 310. The top screw 322 is threadedly matched with the pipe 100, and the top screw 322 presses the switch assembly 310 toward the drain port 107 by squeezing the elastic member 321. By screwing the top screw 322, the depth of the top screw 322 entering the pipe 100 is changed, and the elastic deformation of the elastic member 321 can be adjusted, thereby changing the blocking force of the pressure regulating assembly 320. The structure is simple and the cost is low.

[0070] Optionally, the elastic member 321 includes but is not limited to a spring or a rubber block.

[0071] like Fig. 9 As shown, a specific embodiment of the second aspect of the present invention provides a sealing system. The sealing system comprises a pushing device 20 and a sealing device 10 of any of the above embodiments; the pushing device 20 is sealingly assembled in the assembly cavity 101 of the sealing device 10 .

[0072] This embodiment includes the sealing device 10 of any of the above embodiments, and therefore has at least the above advantages, which will not be repeated here. In addition, the pushing device 20 can not only deliver the test instrument into the borehole, but also seal the assembly cavity 101, and cooperate with the sealing device 10 to create a sealed water environment for the test instrument.

[0073] like Fig. 9 As shown, in some embodiments, the sealing system also includes a sealing guide rod 30; the sealing guide rod 30 has a guide rod cavity, which is connected to the assembly cavity 101 of the pipeline 100; one end of the sealing guide rod 30 is detachably connected to the proximal end of the sealing device 10, so as to push the sealing device 10 to the target depth in the borehole.

[0074] like Figures 11 to 18 As shown, in some embodiments, the pushing device 20 includes a pushing guide rod 400 ; the pushing guide rod 400 includes a guide rod body 410 and a fastening structure 420 .

[0075] The guide rod body 410 includes a first splicing unit 411 and a second splicing unit 412. The fastening structure 420 is connected to the first splicing unit 411 and the second splicing unit 412, so that the first splicing unit 411 and the second splicing unit 412 are spliced ​​together to form a guide rod body 410 having a hollow cavity 413 inside. One end of the guide rod body 410 is used to connect with a test instrument, and the hollow cavity 413 is used to accommodate the cable of the test instrument, so that the cable extends out of the guide rod body 410 along the axial direction of the hollow cavity 413.

[0076] In this embodiment, by providing a fastening structure 420 connected to the first splicing unit 411 and the second splicing unit 412, the fastening structure 420 can connect the first splicing unit 411 and the second splicing unit 412 together, so that the first splicing unit 411 and the second splicing unit 412 are spliced ​​together to form a guide rod body 410 with a hollow cavity 413 inside. One end of the guide rod body 410 can be connected to the test instrument to close the opening of one end of the hollow cavity 413. At this time, the cable of the test instrument can be accommodated in the hollow cavity 413, and the cable extends out of the guide rod body 410 along the axial direction of the hollow cavity 413. In this way, the guide rod body 410 can wrap the cable in the central control cavity, so that the cable is isolated from the water environment outside the guide rod body 410, the waterproof ability of the cable is improved, the influence of water on the test data is avoided, and the accuracy of the test result is improved. The problem that the cable of the test instrument such as the sonic logging instrument in the prior art affects the accuracy of the test result due to the decrease in waterproof ability is solved.

[0077] In addition, because the pushing device 20 of this embodiment is connected to the test instrument, the test instrument can also be pushed to the target test site through the pushing device 20, thereby achieving the purpose of fixed-point delivery of the test instrument and further improving the accuracy of the test results.

[0078] It is understandable that the testing instrument includes but is not limited to an acoustic logging instrument. In this embodiment, the testing instrument can be used in a liquid environment, and the specific type of the testing instrument is not limited.

[0079] It is understandable that the cable can be electrically connected to the computer after passing through the guide rod body 410. The cable transmits the data collected by the test instrument to the computer, and the computer can be used to store and / or process the received data.

[0080] It should be noted that the pushing device 20 of this embodiment can be used in the case where the end of the cable away from the test instrument is not connected to the computer, and can also be used in the case where the end of the cable away from the test instrument is already connected to the computer. In this case, there is no need to remove the cable from the computer to achieve the installation and protection of the cable.

[0081] A use process of the pushing device 20 of this embodiment includes: separating the first splicing unit 411 and the second splicing unit 412, placing the cable on the side of the first splicing unit 411 facing the second splicing unit 412, and then using the fastening structure 420 to connect the second splicing unit 412 and the first splicing unit 411 together to form a guide rod body 410 with a hollow cavity 413 inside; then, connecting the testing instrument to one end of the guide rod body 410 to close one end opening of the hollow cavity 413, and the other end of the guide rod body 410 can extend above the water surface, so that the hollow cavity 413 is completely closed, isolating the cable from water, improving the waterproof ability of the cable, and environmental adaptability, and improving the accuracy of the test results.

[0082] At present, for the test instruments such as sonic logging instruments that need to work in water environment, one end of the cable is connected to the probe of the test instrument, and the other end is connected to a data acquisition device such as a computer. Moreover, due to the different depths of the test rock formations, the length of the cable connected to it usually ranges from a few meters to tens of meters, or even hundreds of meters. If a pipe body with an integrated structure is used, it is necessary to manually insert the probe carrying the cable from one end of the pipe body and pass it out from the other end. This operation method is relatively easy to operate for shorter cables, but it is less easy to operate for longer cables, inefficient, and consumes a lot of manpower and time. The guide rod body 410 formed by the first splicing unit 411 and the second splicing unit 412 of this embodiment can avoid the pipe threading operation. Whether it is for shorter cables or longer cables, it is easy to operate and can greatly improve work efficiency.

[0083] like Figures 11 to 14As shown, in some embodiments, the first splicing unit 411 includes a first guide rod body 4111 and two first guide rod heads 4112; the two first guide rod heads 4112 are respectively connected to the two ends of the first guide rod body 4111; the second splicing unit 412 includes a second guide rod body 4121 and two second guide rod heads 4122; the two second guide rod heads 4122 are respectively connected to the two ends of the second guide rod body 4121; the fastening structure 420 is connected to the first guide rod body 4111 and the second guide rod body 4121, so that the first guide rod body 4111 and the second guide rod body 4121 are spliced, and the first guide rod head 4112 and the second guide rod head 4122 are spliced ​​to form a guide rod body 410. Specifically, the first guide rod body 4111 and the second guide rod body 4121 are spliced ​​to form a guide rod body 414 having a hollow cavity 413 inside, the first guide rod head 4112 and the second guide rod head 4122 are spliced ​​to form a guide rod joint 415 having a wire hole inside, the guide rod joint 415 is connected to the guide rod body 414, and the wire hole is connected to the hollow cavity 413. The guide rod joint 415 can be provided to connect the push guide rod 400 with the corresponding components. For example, two or more push guide rods 400 can be connected through the guide rod joint 415 to increase the length of the push device 20, thereby achieving the purpose of pushing the test instrument into the target test depth.

[0084] Furthermore, the wire hole is coaxially arranged with the hollow cavity 413 .

[0085] Furthermore, the guide rod body 414 is welded to the guide rod joint 415 . In other words, the first guide rod head 4112 is welded to the first guide rod body 4111 , and the second guide rod head 4122 is welded to the second guide rod body 4121 .

[0086] Specifically, the outer diameter of the guide rod joint 415 matches the inner diameter of the guide rod body 414 , and the guide rod joint 415 is inserted into the hollow cavity 413 of the guide rod body 414 and is welded to the guide rod body 414 .

[0087] Furthermore, the guide rod body 414 and the guide rod joint 415 may be made of different metal materials.

[0088] Exemplarily, the guide rod body 414 may be made of aluminum alloy to reduce the weight of the entire pushing device; the guide rod joint 415 may be made of steel to ensure welding strength.

[0089] like Fig.13 and Fig.14As shown, further, the push guide rod 400 also includes a sealing strip (not shown in the figure), which is arranged between the first splicing surface 4113 of the first guide rod body 4111 and the second splicing surface 4123 of the second guide rod body 4121. When the fastening structure 420 connects the first splicing unit 411 and the second splicing unit 412 together, the first guide rod body 4111 and the second guide rod body 4121 squeeze the sealing strip to ensure that the splicing of the guide rod body 410 has good sealing performance, thereby preventing water from entering the hollow cavity 413 from the splicing.

[0090] Preferably, a mounting groove is provided in the first joint surface 4113 or the second joint surface 4123 along the axial direction, and the sealing strip is arranged in the mounting groove.

[0091] like Fig.16 As shown, further, radially, a flange 4151 is formed on the side of the guide rod joint 415; the flange 4151 divides the guide rod joint 415 into a first connecting section 4152 and a second connecting section 4153; the first connecting section 4152 is inserted into the hollow cavity 413, and is welded to the guide rod body 414; the second connecting section 4153 is used to be inserted into one end of the first connecting joint 500, and is detachably connected to the first connecting joint 500, and the other end of the first connecting joint 500 is used to be detachably connected to the first connecting section 4152 of the guide rod joint 415 of another pushing device.

[0092] Preferably, a first sealing ring 4154 is provided on one side of the flange 4151 facing the first connection joint 500, and the first sealing ring 4154 abuts against the first connection joint 500. In other words, when the second connection section 4153 is connected to the first connection joint 500, the first connection joint 500 squeezes the first sealing ring 4154 to improve the sealing performance.

[0093] Specifically, two first limiting bosses 4155 are formed on the side surface of one end of the second connecting section 4153 away from the first connecting section 4152 , and the two first limiting bosses 4155 are symmetrically arranged; a joint limiting groove 4156 is formed between the first limiting boss 4155 and the flange 4151 .

[0094] like Fig.11 , Fig.12 , Fig.17 and Fig.18As shown, in some embodiments, the pushing device 20 further includes a first connection joint 500; the first connection joint 500 is detachably connected to the end of the pushing guide rod 400, and is used to connect the two pushing guide rods 400; the first connection joint 500 is provided with a connection cavity 510 along the axial direction, and the connection cavity 510 is communicated with the hollow cavity 413. By providing the first connection joint 500, the number of the pushing guide rods 400 can be increased or decreased according to the length of the cable, so that all the cables below the water surface are wrapped in the hollow cavity 413, and the operability is improved at the same time.

[0095] Furthermore, the connecting cavity 510 is coaxially arranged with the hollow cavity 413 .

[0096] like Fig.17 and Fig.18 As shown, further, the first connection joint 500 is plugged and matched with the push guide rod 400 for easy installation and removal. Along the radial direction of the hollow cavity 413, a threaded hole is provided on the side of the first connection joint 500, and a top screw 530 is provided in the threaded hole. The top screw 530 is abutted against the side of the push guide rod 400 at one end thereof facing the push guide rod 400.

[0097] Specifically, the guide rod joint 415 is detachably connected to the first connecting joint 500, and the top screw 530 abuts against the side of the guide rod joint 415 at one end thereof to prevent the first connecting joint 500 and the pushing guide rod 400 from sliding against each other during use.

[0098] like Fig.16 As shown, specifically, the side of the guide rod joint 415 has a joint positioning hole 4157 , the joint positioning hole 4157 is located in the joint limiting groove 4156 , and the top screw 530 is located in the joint positioning hole 4157 and abuts against the side of the guide rod joint 415 .

[0099] like Fig.17 and Fig.18 As shown, specifically, at least one second limiting boss 520 is formed at both ends of the inner side wall of the first connection joint 500, and a threaded hole is formed in the second limiting boss 520. After the guide rod joint 415 is inserted into the first connection joint 500, the guide rod joint 415 or the first connection joint 500 is rotated so that the second limiting boss 520 is limitedly clamped in the joint limiting groove 4156 of the guide rod joint 415, so that the first connection joint 500 is limitedly connected with the guide rod joint 415. In order to avoid sliding each other during use, a top screw 530 is provided, and the depth of the top screw 530 in the threaded hole is adjusted to make the guide rod joint 415 and the first connection joint 500 tightly connected.

[0100] Preferably, two second limiting bosses 520 are provided at one end of the first connection joint 500, and the two second limiting bosses 520 are symmetrically arranged to improve the stability of the limiting connection. After the guide rod joint 415 is inserted into the connection cavity 510 of the first connection joint 500, the first connection joint 500 is rotated 90° so that the second limiting boss 520 is limited in the joint limiting groove 4156.

[0101] In some embodiments, the pushing device 20 further includes a second connecting joint, one end of which is detachably connected to the guide rod joint 415, and the other end of which is used for detachably connecting to the testing instrument.

[0102] It is understandable that the structures of the first connection joint 500 and the second connection joint may be the same or different.

[0103] Specifically, the structure of the portion where the second connecting joint is connected to the testing instrument is adapted to the testing instrument.

[0104] In some embodiments of the present invention, the fastening structure 420 may be a throat hoop, but is not limited to a throat hoop. The first splicing unit 411 and the second splicing unit 412 are clamped together by the throat hoop to form the guide rod body 410.

[0105] like Figures 13 to 15 As shown, in some other embodiments of the present invention, the fastening structure 420 includes a limiting socket 421 , a locking plate 422 and a locking member 423 .

[0106] The limiting card seat 421 is connected to the first splicing unit 411; along the axial direction, the limiting card seat 421 is provided with a threading hole 4211, the threading hole 4211 is located in the hollow cavity 413, and is connected to the hollow cavity 413, and the threading hole 4211 has a wire passing port on the side facing the second splicing unit 412. When in use, the cable is put into the threading hole 4211 from the wire passing port, and the cable extends out of the guide rod body 410 along the threading hole 4211. The locking plate 422 is located in the threading hole 4211, and the locking plate 422 and the threading hole 4211 are axially slidably matched and radially limited. One end of the locking member 423 is connected to the locking plate 422, and the other end is connected to the second splicing unit 412. The locking member 423 is used to drive the locking plate 422 away from the first splicing unit 411 in the radial direction to squeeze the limiting card seat 421. Specifically, the limiting clamping seat 421 is connected to the first guide rod body 4111, and the other end of the locking member 423 is connected to the second guide rod body 4121. When in use, the locking member 423 can be used to keep the locking plate 422 away from the first splicing unit 411, because the locking plate 422 is also radially limited by the limiting clamping seat 421, and the limiting clamping seat 421 is connected to the first guide rod body 4111, so the locking plate 422 drives the first guide rod body 4111 to move radially toward the second guide rod body 4121 through the limiting clamping seat 421, so as to increase the fastening force between the first guide rod body 4111 and the second guide rod body 4121, so that the first splicing unit 411 and the second splicing unit 412 are spliced ​​to form the guide rod body 410.

[0107] Furthermore, the push guide rod 400 includes a plurality of fastening structures 420, which are arranged at intervals along the axial direction. By increasing the number of the fastening structures 420, the fastening force can be further increased, so that the fastening force is arranged as evenly as possible, thereby improving the sealing performance.

[0108] like Fig.12 and Fig.15 As shown, the locking member 423 includes a screw, and the locking plate 422 is fastened and connected to the second splicing unit 412 by the screw. Specifically, the locking plate 422 is fastened and connected to the second guide rod body 4121 by the screw. The structure is simple, the cost is reduced, and the operation is convenient.

[0109] like Fig.15 As shown, the fastening structure 420 also includes a cushion block 424; the cushion block 424 is located in the hollow cavity 413, and the second splicing unit 412, the cushion block 424 and the locking plate 422 are fastened and connected by screws. Specifically, the second guide rod body 4121, the cushion block 424 and the locking plate 422 are fastened and connected by screws. The cushion block 424 is provided to increase the stability and strength of the connection.

[0110] Preferably, the side surface of the pad 424 facing the second guide rod body 4121 is an arc surface, and the arc surface cooperates to play a role of limiting, so that the pad 424 is not easy to rotate, which is convenient for installation. At the same time, the arc surface structure increases the contact area between the pad 424 and the second guide rod body 4121, reduces the contact pressure, makes the pad 424 not easy to deform, enhances the strength of its contact structure, and increases the service life of the rod body.

[0111] Further, the first splicing unit 411 is provided with a first mounting hole (not shown in the figure), and the limit card seat 421 is arranged in the first mounting hole and connected to the hole wall of the first mounting hole. Specifically, the first guide rod body 4111 is provided with a first mounting hole, and the limit card seat 421 is arranged in the first mounting hole. By arranging the limit card seat 421 in the first mounting hole, the radial space occupied by the limit card seat 421 in the hollow cavity 413 can be reduced, so that more cables can be accommodated in the hollow cavity 413.

[0112] like Fig.15 As shown, further, the limiting clamp 421 includes a bottom plate 4212 and two side plates 4213; the two side plates 4213 are radially arranged on both sides of the bottom plate 4212, and the two side plates 4213 are folded toward each other on one side away from the bottom plate 4212 to form a flange 4214, and the two flanges 4214, the two side plates 4213 and the bottom plate 4212 are surrounded to form a threading hole 4211 with a wire passing opening on one side.

[0113] Preferably, a side surface of the bottom plate 4212 away from the side plate 4213 is an arc-shaped surface, and the arc-shaped surface is flush with the outer side surface of the first guide rod body 4111 .

[0114] A method of using the push device 20 of this embodiment includes: Use fasteners, such as screws, to combine and connect the locking plate 422, the cushion block 424 and the second guide rod body 4121; Place the rear end cable of a testing instrument, such as an acoustic logging instrument, from the cable port into the cable hole 4211; Push and slide the locking plate 422 from the end of the threading hole 4211 away from the threading port into the threading hole 4211, and the second splicing unit 412 slides axially relative to the first splicing unit 411 until the second splicing surface 4123 of the second splicing unit 412 is aligned with the first splicing surface 4113 of the first splicing unit 411; Tighten the screws to combine the first splicing unit 411 and the second splicing unit 412 to form the pushing guide rod 400; One end of the pushing guide rod 400 is connected to another pushing guide rod 400 through the first connecting joint 500 to extend the length of the pushing device until the length of the pushing device reaches the required length.

[0115] like Fig.10As shown, a specific embodiment of the third aspect of the present invention provides a sealing method. The sealing method comprises: S100, placing the sealing device 10 in the drilled hole; sealingly assembling the pushing device 20 equipped with the testing instrument in the assembly cavity 101 of the sealing device 10, so that the testing instrument enters the target depth of the drilled hole.

[0116] Specifically, a drilling rig is used to drill a borehole of required diameter and depth in a tunnel or coal mine tunnel in which the rock mass to be tested is to be drilled. The borehole is usually a vertically upward borehole, an inclined upward borehole, or a horizontal borehole.

[0117] The water inlet 104 of the sealing device 10 is connected and fixed to the water pipe, and a pressure gauge is connected between the water inlet 104 and the water pipe to test the water pressure; then the sealing device 10 is placed in the drilled hole.

[0118] The testing instrument is installed on the pushing device 20 , and the pushing device 20 is sealed and assembled in the assembly cavity 101 of the sealing device 10 , and the testing instrument is sent to the target depth of the borehole through the pushing device 20 .

[0119] S200 , inject water into the water inlet 104 to expand the elastic shell 200 until it abuts against the inner wall of the borehole, and at the same time fill the borehole with water to ensure that the test instrument is in a liquid environment.

[0120] Specifically, the water source is turned on, and water flows into the first flow channel 102 from the water inlet 104, and then enters the water-filled gap between the elastic shell 200 and the pipeline 100 from the pressure inlet 105, so that the elastic shell 200 expands, and at the same time, the distal end of the elastic shell 200 moves toward the proximal end until the elastic shell 200 abuts against the wall of the borehole to close the borehole.

[0121] When the water pressure in the water-filled gap is greater than the blocking force of the switch component 300, the switch component 300 opens, and the water in the second flow channel 103 enters the borehole from the drain port 107 to inject water into the borehole, so that the test instrument is in a sealed water environment.

[0122] The test instrument is started, and the test instrument collects geological rock mass information and sends the geological rock mass information to the host computer; the host computer controls the memory to store the geological rock mass information.

[0123] In some embodiments, the sealing method further includes: after the test is completed, stop injecting water into the water inlet 104. Drain the water in the sealing device 10, and the elastic shell 200 returns to the contracted state, and the distal end of the elastic shell 200 moves toward the drain port 107, so that the elastic shell 200 stretches. After the elastic shell 200 contracts to separate from the inner wall of the borehole, the sealing device 10 and the testing instrument are removed from the borehole to complete the test.

[0124] Furthermore, the testing instrument includes but is not limited to an acoustic logging instrument.

[0125] Furthermore, the sealing guide rod 30 is connected to the sealing device 10, and the sealing device 10 is pushed to the target depth of the drilling by means of the sealing guide rod 30; then the pushing device 20 equipped with the testing instrument is sealed and assembled in the assembly cavity 101 of the sealing device 10, so that the testing instrument enters the target depth of the drilling.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing device, characterized in that: include: A pipe (100), wherein an assembly cavity (101) with two ends opened is formed inside the pipe (100) along the axial direction of the pipe (100); a water inlet (104), a water outlet (107), a pressure inlet (105) and a pressure outlet (106) are formed on the pipe wall of the pipe (100); a first flow channel (102) and a second flow channel (103) are formed inside the pipe wall; the first flow channel (102) and the second flow channel (103) are arranged at intervals along the axial direction; the water inlet (104) and the pressure inlet (105) are both in communication with the first flow channel (102), and the water outlet (107) and the pressure outlet (106) are both in communication with the second flow channel (103); An elastic shell (200) is sleeved on the outside of the pipe (100), and the elastic shell (200) has an expanded state and a contracted state; in the expanded state, the elastic shell (200) and the pipe (100) form a water-filled gap, and the elastic shell (200) is used to abut against the inner wall of the drilled hole to seal the drilled hole; the pressure inlet (105) is connected to the water-filled gap and the first flow channel (102), and the pressure outlet (106) is connected to the water-filled gap and the second flow channel (103); A switch component (300) is arranged at the drain outlet (107) and is used to open or block the drain outlet (107); when the water pressure in the water-filled gap is greater than the blocking force of the switch component (300) on the drain outlet (107), the switch component (300) opens the drain outlet (107), allowing the water in the second flow channel (103) to flow from the drain outlet (107) into the drilled hole.

2. The sealing device according to claim 1, characterized in that: The elastic housing (200) comprises: An elastic sleeve assembly (210) is sleeved on the outside of the pipeline (100), and the proximal end of the elastic sleeve assembly (210) close to the water inlet (104) is connected to the pipeline (100); the elastic sleeve assembly (210) has the expanded state and the contracted state; A sealing ring (220) is sleeved on the outside of the pipe (100); the far end of the elastic sleeve assembly (210) away from the water inlet (104) is axially slidably matched with the pipe (100) through the sealing ring (220).

3. The sealing device according to claim 2, characterized in that: The elastic sleeve assembly (210) comprises: An elastic sleeve (211) is sleeved on the outside of the pipe (100) and has the expanded state and the contracted state; A first fastener (212), disposed at the proximal end of the elastic sleeve (211), and used to connect the proximal end of the elastic sleeve (211) to the pipeline (100); A second fastener (213) is disposed at the distal end of the elastic sleeve (211) and is used to connect the elastic sleeve (211) to the sealing ring (220).

4. The sealing device according to claim 2, characterized in that: A limiting protrusion (131) is formed on the outer side surface of the pipe (100), and the limiting protrusion (131) is located between the pressure discharge port (106) and the water discharge port (107), and is close to the pressure discharge port (106).

5. The sealing device according to claim 1, characterized in that: The switch component (300) comprises: A switch assembly (310), disposed at the drain outlet (107), and used to open or block the drain outlet (107); A pressure regulating component (320) is connected to the switch component (310); the pressure regulating component (320) has the blocking force and is used to press the switch component (310) toward the drain outlet (107) to block the drain outlet (107); the pressure regulating component (320) is capable of adjusting the magnitude of the blocking force.

6. The sealing device according to claim 5, characterized in that: The voltage regulating component (320) comprises: An elastic member (321) connected to the switch assembly (310); A top screw (322) is threadably matched with the pipe (100), and the top screw (322) presses the switch assembly (310) toward the drain outlet (107) by squeezing the elastic member (321).

7. The sealing device according to any one of claims 1 to 6, characterized in that: The pipeline (100) comprises: An inner tube (110) having an assembly cavity (101) formed therein along the axial direction and having openings at both ends; A first outer tube (120) is sleeved on the outer side of the inner tube (110) to form the first flow channel (102) with the inner tube (110); the water inlet (104) and the pressure inlet (105) are provided on the tube wall of the first outer tube (120); The second outer tube (130) is sleeved on the outer side of the inner tube (110) and is arranged along the axial direction with the first outer tube (120); the second flow channel (103) is formed between the second outer tube (130) and the inner tube (110); and the pressure relief port (106) and the water discharge port (107) are provided on the tube wall of the second outer tube (130).

8. The sealing device according to claim 7, characterized in that: The inner tube (110) comprises a plurality of sections of tube body, and the plurality of sections of tube body are detachably connected.

9. A sealing system, characterized in that: It comprises a pushing device (20) and the sealing device (10) according to any one of claims 1 to 8, wherein the pushing device (20) is sealingly assembled in the assembly cavity (101) of the sealing device (10).

10. A sealing method, characterized in that: The sealing system according to claim 9 is used; the sealing method comprises: The sealing device (10) is placed in the borehole; the pushing device (20) equipped with the testing instrument is sealed and assembled in the assembly cavity (101) of the sealing device (10) so that the testing instrument enters the target depth of the borehole; Water is injected into the water inlet (104) to expand the elastic shell (200) until it abuts against the inner wall of the borehole, and at the same time the borehole is filled with water to ensure that the test instrument is in a liquid environment.

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