An acoustic testing apparatus for an underground cavern

Abstract

The application relates to the technical field of acoustic wave testing, in particular to an acoustic wave testing equipment for underground caverns; the equipment comprises a tester and a transducer connected with the tester through a wire; the transducer transmits waves and transmits signals to the tester through the wire after receiving the waves; the transducer is fixedly connected with an elastic pipe through a transducing seat; an elastic liquid inlet pipe and an elastic gas outlet pipe pass through the elastic pipe; one end of the liquid inlet pipe is connected with the outer wall of the transducing seat, and the other end is connected with a water pump; in the process of approaching the testing hole, the two pushing chains are turned inward and combined to form a pushing piece; in the process of moving away from the testing hole, the two pushing chains are turned outward and separated; thus, the testing equipment can meet the testing requirements of testing holes with different depths, the pushing piece can be combined and separated quickly, the testing efficiency is high, and the equipment can be used in the space-limited surroundings of some testing hole orifices.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic wave testing, in particular to an acoustic wave testing device for underground caverns. BACKGROUND

[0002] As the core building of a hydropower project, the drilling operation is a key link in the drilling and blasting construction of the underground cavern group. The construction conditions are complex and the quality requirements are strict, and the precise and efficient drilling control is extremely difficult. Among them, the peripheral hole, as a key drilling hole for controlling the size of the cavern, its construction quality directly determines the overbreak and underbreak of the cavern. Unqualified peripheral drilling holes will directly affect the excavation quality, delay the construction progress and increase the construction cost.

[0003] In order to ensure the drilling quality of the underground cavern group and predict the rock structure around the drilling hole, a sound wave testing device needs to be used for testing. The core principle of the testing device is based on the propagation characteristics of elastic waves. The transducer of the device emits elastic waves of a specific frequency to the surrounding rock mass or concrete of the test hole. The elastic waves propagate along the hole wall to the inside of the rock mass. If defects such as cracks, cavities, and non-dense grouting are encountered, part of the waves will be reflected. After the transducer receives the reflected wave signal, it is transmitted to the external testing instrument through the wire. The instrument analyzes the propagation time (calculates the wave velocity), amplitude attenuation, and waveform distortion of the reflected wave, and reversely calculates the density, integrity, and strength of the rock / concrete to determine whether there are defects.

[0004] In the prior art, for example, the underground cavern edge and top arch acoustic wave testing device with the publication number CN215931757U, or the underground cavern edge and top arch acoustic wave testing device with the publication number CN116818892A; in the testing process, since the propagation stability of elastic waves in water is much better than that in air, water needs to be filled into the test hole as a "wave propagation medium" to ensure the stability of the test; the opening direction of the test hole of the underground cavern is different. For the test hole with the opening upward, after filling the liquid in the test hole, the wire connected with the transducer is directly controlled to hang the transducer into the test hole, and the axial position of the transducer in the test hole is changed according to the testing needs to meet the testing requirements; for the test hole with the opening downward, while ensuring that the test hole is filled with water, the transducer needs to be moved axially in the test hole by using a push rod. The depth of the test hole is different. If the push rod is set to be short, it cannot meet the testing requirements of some deeper test holes. If the push rod is set to be long, it will cause the test device to be too long, which is not convenient for moving in the underground cavern. In the above two patents and the prior art, the push rod is set to be multi-section, which on the one hand meets the convenient requirements, and on the other hand can be applied to the testing requirements of test holes with different depths. However, the multi-section push rod needs to be disassembled and assembled by the operator in the process of mutual connection, which is complicated and time-consuming. Especially in the scene of frequent adjustment of testing depth or continuous operation of multiple test holes, the single detection time will be prolonged. SUMMARY

[0005] In order to make up for the deficiencies of the prior art, the application provides an acoustic wave testing device for underground caverns, which can meet the testing requirements of testing holes with different depths by turning two pushing chains inward to form a pushing member when the transducer is close to the testing hole and turning the two pushing chains outward to separate when the transducer is away from the testing hole, so that the advantages of convenient operation and easy movement are maintained, the pushing member is combined and separated quickly, the testing efficiency is high, and the device can be used in some testing holes with limited space around the hole.

[0006] The technical scheme adopted by the application to solve the technical problems is: the acoustic wave testing device for underground caverns comprises a tester and a transducer connected with the tester through a wire; the transducer transmits waves and transmits signals to the tester through the wire after receiving waves; the transducer is fixedly connected with an elastic tube through a transducing seat; an elastic liquid inlet pipe and an elastic gas outlet pipe pass through the elastic tube; one end of the liquid inlet pipe is connected with the outer wall of the transducing seat, and the other end is connected with a water pump; one end of the gas outlet pipe extends to the top of the transducer through an extension pipe; the wire passes through the elastic tube to connect the transducer and the tester; a pushing member is sleeved on the outer wall of the elastic tube; the pushing member is composed of two symmetrical pushing chains; the pushing chain is composed of a plurality of arc blocks which are hingedly connected in sequence; the uppermost arc block is fixedly connected with the transducing seat, and the inner wall of the arc block is adapted to the outer wall of the elastic tube; the outer wall of the arc block is provided with a hinge groove at a lower position; the upper end of the arc block is fixedly connected with a hinge block near the outer wall; the hinge groove of the arc block at the adjacent lower position is rotationally connected with the hinge block at the adjacent upper position; the pushing chain is folded inward to form a straight strip, and is bent outward.

[0007] Preferably, the outer wall of the pushing member is movably and sealingly sleeved with a sealing sleeve provided with a sealing ring; the outer wall of the sealing sleeve is fixedly connected with a dumbbell shell away from the transducing seat; the dumbbell shell is provided with a shell hole in communication with the inner side of the sealing sleeve; the elastic tube is movably and sealingly connected in the shell hole; the inner side of the dumbbell shell is in communication with the shell hole; the inner wall of the dumbbell shell is rotationally connected with two symmetrically arranged first traction wheels; the outer wall of the first traction wheel is provided with a first annular groove adapted to the outer wall of the pushing member; the inner side of the dumbbell shell is rotationally connected with a winding rod through a torsional spring; the outer wall of the winding rod is connected with a winding wheel; the distal end of the pushing chain is fixedly connected with the winding wheel through a winding rope; the end portions of the two first traction wheels are drivingly meshed through gears; and one of the gears is fixedly connected with a handle outward.

[0008] Preferably, the winding rod axial length is greater than the winding wheel axial length; the outer wall of the winding rod is provided with an axial slot along the axial direction; the axial slot is slidably connected with an axial block; the axial block is fixedly connected with the winding wheel; the dumbbell shell is fixedly connected with a handle on the side away from the sealing sleeve.

[0009] Preferably, the first annular slot is uniformly provided with a tooth along the circumferential direction; the arc-shaped outer wall of the arc-shaped block is provided with a plurality of tooth slots along the axial direction; the tooth can be clamped into the tooth slot.

[0010] Preferably, the handle is provided with a movable hole; the movable hole is movably connected with a movable rod; the outer wall of the dumbbell shell is uniformly provided with a jack around the handle rotation point; the movable rod can be inserted into the jack.

[0011] Preferably, the outer wall of the dumbbell shell away from the sealing sleeve is rotatably connected with two second traction wheels through a U-shaped frame; the end of the two second traction wheels is fixedly connected with a second sprocket; the end of the first traction wheel is fixedly connected with a first sprocket; the first sprocket and the corresponding second sprocket are drivingly connected through a chain; the outer wall of the second traction wheel is provided with a second annular slot matched with the elastic tube.

[0012] Preferably, the contact position of the two arc-shaped blocks on the pushing chain is a contact surface; one of the contact surfaces of the pushing chain is provided with an L-shaped clamping slot; the other contact surface of the pushing chain is provided with a J-shaped slot; the J-shaped slot is slidably connected with a J-shaped block; the J-shaped block is connected between the upper end and the inner wall of the J-shaped slot through a tension spring; the end of the J-shaped block close to the clamping slot is obliquely provided with a guide surface upward; the end of the J-shaped block close to the clamping slot can be clamped into the clamping slot; the J-shaped block is made of magnetic material; the inner wall of the dumbbell shell is provided with a magnet and can magnetically attract the J-shaped block.

[0013] Preferably, the clamping slot and the J-shaped slot in the arc-shaped block are arranged away from the hinged block.

[0014] Preferably, the hinged hole is horizontally provided through the hinged block; the hinged hole is movably connected with a hinged rod; the hinged rod is fixedly connected with the hinged slot; the width of the hinged block is less than the width of the hinged slot; the upper surface of the arc-shaped block is provided with a strip-shaped slot; one end of the strip-shaped slot is close to the hinged block, and the other end is away from the hinged block; the lower surface of the arc-shaped block is fixedly connected with a strip-shaped block; the length of the strip-shaped block is less than the length of the strip-shaped slot.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The present application can meet the test hole test requirements of different depths by turning the two pushing chains inward to merge into a pushing piece during the process of the transducer approaching the test hole and turning the two pushing chains outward to separate during the process of the transducer moving away from the test hole, while maintaining the advantages of convenient operation and easy movement, the pushing piece combination and separation are relatively fast, the test efficiency is relatively high, and the device can be used in some test hole orifice surrounding space limited.

[0017] 2. The present application can not only make the operator easily and accurately control the transducer movement test through the components such as dumbbell shell, crank, winding wheel and the like, but also solve the problem of pushing chain winding disorder, improve the safety of portable equipment, and greatly shorten the test hole switching time, which is suitable for more test scenarios.

[0018] 3. In the process of the two merged arc-shaped blocks gradually moving away from the magnet, the magnetic force acting on the J-shaped block will decrease, and under the action of the magnetic force, the end of the J-shaped block provided with a guide surface will be buckled into the clamping groove, realizing the connection of the two symmetrical arc-shaped blocks, so that the two pushing chains are more stable after merging into a pushing piece, and the bending and separation of the pushing chains are less likely to occur, so that the stability of the test equipment in the test process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is Figure 1 an enlarged view of A in the figure;

[0022] Figure 3 is Figure 1 an enlarged view of B in the figure;

[0023] Figure 4 is Figure 1 a perspective view of the rear side;

[0024] Figure 5 is Figure 4 an enlarged view of C in the figure;

[0025] Figure 6 is Figure 4 an enlarged view of D in the figure;

[0026] Figure 7 is a perspective view of the internal structure of the dumbbell shell;

[0027] Figure 8 is Figure 7 an enlarged view of E in the figure;

[0028] Figure 9 is Figure 7Enlarged view at F;

[0029] Figure 10 is a perspective view of two pushing chains;

[0030] Figure 11 is a perspective view of the arc-shaped block in the present application;

[0031] Figure 12 is a perspective view of the clamping groove and J-shaped groove;

[0032] Figure 13 is a sectional view of the arc-shaped block in the present application;

[0033] Figure 14 is a sectional view of the present application;

[0034] Figure 15 is Figure 14 Enlarged view at G.

[0035] In the figure: transducer 1, wire 11, transducer seat 12, elastic tube 13, liquid inlet tube 14, gas outlet tube 15, extension tube 16, pushing chain 22, arc-shaped block 2, strip-shaped groove 20, strip-shaped block 201, hinged groove 21, hinged block 23, hinged hole 231, hinged rod 232, tooth groove 24, contact surface 25, clamping groove 26, J-shaped groove 27, J-shaped block 28, guide surface 281, tension spring 29, sealing sleeve 3, sealing ring 31, first stop ring 32, internally threaded sleeve 33, dumbbell-shaped shell 4, magnet 40, shell hole 41, winding rod 42, winding wheel 43, winding rope 44, axial groove 45, axial block 46, handle 47, insertion hole 48, U-shaped frame 49, first traction wheel 5, first annular groove 51, gear 52, crank 53, teeth 54, movable hole 55, movable rod 56, first sprocket 57, second traction wheel 6, second sprocket 61, chain 62, second annular groove 63. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0037] As Figures 1 to 15 shown, the present application includes the following embodiments:

[0038] Embodiment 1: a sound wave testing device for underground caverns, comprising a tester (not shown in the figure) and a transducer 1 connected with the tester through a wire 11; the transducer 1 transmits signals to the tester through the wire 11 after emitting and receiving waves; the transducer 1 is fixedly connected with an elastic tube 13 through a transducer seat 12; an elastic liquid inlet pipe 14 and an air outlet pipe 15 pass through the elastic tube 13; one end of the liquid inlet pipe 14 is connected with the outer wall of the transducer seat 12, and the other end is connected with a water pump (not shown in the figure); one end of the air outlet pipe 15 is extended to the top of the transducer 1 through an extension pipe 16; the wire 11 passes through the elastic tube 13 and is connected with the transducer 1 and the tester; a pushing member is sleeved on the outer wall of the elastic tube 13; the pushing member is composed of two pushing chains 22; the pushing chain 22 is composed of a plurality of arc blocks 2 connected end to end; the uppermost arc block 2 is fixedly connected with the transducer seat 12, and the arc inner wall of the arc block 2 is adapted to the outer wall of the elastic tube 13; the arc outer wall of the arc block 2 is provided with a hinge groove 21 at a lower position; the arc block 2 is fixedly connected with a hinge block 23 at a position close to the upper end of the arc outer wall; the arc block 2 at an adjacent lower position is rotatably connected in the hinge groove 21 of the arc block 2 at an adjacent upper position through the hinge block 23; the pushing chain 22 is folded inward to form a straight strip, and can be bent outward; a sealing sleeve 3 with a sealing ring 31 is movably and sealingly sleeved on the outer wall of the pushing member.

[0039] After the testing device is moved to the vicinity of the testing hole to be tested, the transducer 1 is placed into the testing hole, and then the sealing sleeve 3 is controlled to enter the inside of the testing hole, and the sealing ring 31 is controlled to expand; there are two expansion modes of the sealing ring 31, the first mode is to fill the inside of the sealing ring 31 with liquid, and the liquid pump injects the liquid into the elastic sealing ring 31 along the corresponding pipeline to expand the sealing ring 31, and the expanded sealing ring 31 fills the gap between the sealing sleeve 3 and the inner wall of the testing hole; in the case that the sealing ring 31 needs to be deflated, the liquid in the sealing ring 31 is simply pumped out, so as to achieve the expansion and deflation of the sealing ring 31; the second mode is to fixedly connect the elastic sealing ring 31 with the outer wall of the sealing sleeve 3, the first stop ring 32 is fixedly connected with the upper position of the arc outer wall of the sealing sleeve 3, the arc outer wall of the sealing sleeve 3 is provided with external threads, the internal thread sleeve 33 is threadedly connected with the arc outer wall of the sealing sleeve 3, and the sealing ring 31 is fixedly connected with the arc outer wall of the sealing sleeve 3; in the case that the internal thread sleeve 33 is twisted close to the first stop ring 32, the sealing ring 31 is pressed, so as to achieve the expansion of the sealing ring 31; in the case that the internal thread sleeve 33 is twisted away from the first stop ring 32, the pressure on the sealing ring 31 is reduced, so as to release the sealing between the sealing ring 31 and the inner wall of the testing hole; the two sealing modes are both for preventing the water in the testing hole from flowing out during the testing of the testing hole.

[0040] After the gap between the outer wall of the sealing sleeve 3 and the inner wall of the test hole is filled and sealed by the sealing ring 31, the sealing sleeve 3 is loosened and fixed on the inner wall of the test hole under the extrusion of the sealing ring 31, and then the pushing chains 22 on the side of the sealing sleeve 3 away from the transducer 1 are folded inward, the arc-shaped blocks 2 in the pushing chains 22 are turned over, the arc-shaped blocks 2 drive the hinged blocks 23 to rotate along the hinge grooves 21, the arc-shaped inner wall of the arc-shaped blocks 2 contacts the outer wall of the elastic tube 13 after turning over, and the arc-shaped blocks 2 in the two pushing chains 22 are close to each other and in sealing contact, so that the elastic tube 13 is clamped and sealed by the corresponding two arc-shaped blocks 2. After the two pushing chains 22 are turned over inward, they become straight strips, so that after the pushing member is formed by the combination of the two pushing chains 22, the pushing member can drive the elastic tube 13 on the inner side to pass through the sealing sleeve 3, and the pushing member can push the transducer seat 12 and the transducer 1 on the transducer seat 12 to move to the position of the bottom of the test hole. Since the two pushing chains 22 can only be turned over outward, the pushing member as a whole can remain straight after the two pushing chains 22 are turned over inward, thereby improving the stability of the pushing member in driving the transducer 1 to move along the axis of the test hole. After the transducer 1 drives the extension tube 16 to move to the bottom of the test hole, the water pump can make the water enter along the liquid inlet tube 14. Although the liquid inlet tube 14 and the elastic tube 13 are both made of elastic material, the hardness of the liquid inlet tube 14 is greater than that of the elastic tube 13. The liquid enters the test hole along the liquid inlet tube 14. Since the test hole is downward, the liquid gradually converges toward the bottom of the test hole in the test hole. The gas in the test hole is discharged along the extension tube 16 and the gas outlet tube 15. The hardness of the elastic gas outlet tube 15 is greater than that of the elastic tube 13, until the gas outlet tube 15 has water discharge, indicating that the liquid in the test hole is full. Then control the transducer 1 to work, the transducer 1 will emit waves along the liquid medium and the rock, and after reflection, the waves are received by the transducer 1 again. After receiving the wave signal, the transducer 1 transmits the signal to the tester along the wire 11 for analysis, realizes the test in the test hole, and can control the pushing member to drive the transducer 1 to move along the axis of the test hole for testing at different depths. The pushing member and the inner side of the sealing sleeve 3 are movably sealed, and a sealing member can be arranged on the inner side of the sealing sleeve 3 for further sealing.

[0041] After the test is completed, the pushing member is gradually pulled out of the inner side of the sealing sleeve 3, and then the pushing member pulled out of the inner side of the sealing sleeve 3 is separated, that is, the two pushing chains 22 are folded outward away from the end of the transducer 1. After the pushing chain 22 is folded, it is bent, thereby shortening the length of the pushing member, so that the overall volume of the test equipment is reduced, thereby facilitating movement in the underground chamber. Then control the sealing ring 31 to be dry and empty, pull out the transducer 1 and the sealing sleeve 3 from the test hole and insert them into other test holes to be tested, and repeat the above steps.

[0042] The application can meet the testing requirements of test holes with different depths by turning the two pushing chains 22 inward to combine and form the pushing member when the transducer 1 approaches the test hole and turning the two pushing chains 22 outward to separate when the transducer 1 moves away from the test hole, while keeping the operation convenient and easy to move, the pushing member combination and separation are relatively fast, the testing efficiency is relatively high, and the application can be used in some limited space around the test hole.

[0043] In the embodiment 2, the sealing sleeve 3 is fixedly connected with the dumbbell shell 4 at one end away from the transducer seat 12, the dumbbell shell 4 is provided with a shell hole 41 communicating with the inside of the sealing sleeve 3, the elastic tube 13 is movably and sealingly connected in the shell hole 41, the inside of the dumbbell shell 4 communicates with the shell hole 41, the inside wall of the dumbbell shell 4 is rotatably connected with two symmetrically arranged first traction wheels 5, the outer wall of the first traction wheel 5 is provided with a first annular groove 51 adapted to the outer wall of the pushing member, the inside of the dumbbell shell 4 is rotatably connected with a winding rod 42 through a torsional spring (not shown in the figure), the outer wall of the winding rod 42 is connected with a winding wheel 43, the one end of the pushing chain 22 away from the transducer seat 12 is fixedly connected with the winding wheel 43 through a winding rope 44, the end portions of the two first traction wheels 5 are meshingly and drivingly connected through gears 52, and one of the gears 52 is fixedly connected with a crank 53 outward.

[0044] The axial length of the winding rod 42 is greater than the axial length of the winding wheel 43, the outer wall of the winding rod 42 is provided with an axial groove 45 along the axial direction, the axial groove 45 is slidably connected with an axial block 46, the axial block 46 is fixedly connected with the winding wheel 43, and the one side of the dumbbell shell 4 away from the sealing sleeve 3 is fixedly connected with a handle 47.

[0045] In the case of holding the handle 47, the dumbbell shell 4 is controlled to approach the test hole, the dumbbell shell 4 drives the sealing sleeve 3 and the pushing member extending from the sealing sleeve 3 to approach the test hole, the pushing member drives the transducer 1 to be inserted into the test hole, then the sealing sleeve 3 is also controlled to enter into the test hole, then the crank 53 is rotated to drive one of the gears 52 to rotate, the rotation of one of the gears 52 drives the other meshing gear 52 to rotate, the meshing and driving of the two gears 52 drives the connected first traction wheels 5 to rotate, the two first traction wheels 5 rotate in opposite directions at the same speed, the first annular groove 51 on the outer wall of the first traction wheel 5 is adapted to the outer wall of the pushing member, the two first traction wheels 5 drive the pushing chain 22 to combine together and form the pushing member during the rotation, the pushing member moves out from the inside of the sealing sleeve 3, the pushing member drives the transducer seat 12 and the transducer 1 to approach the bottom of the test hole during the movement, the pushing chain 22 overcomes the torsional spring to be unwound from the respective winding wheel 43 during the formation of the pushing member, and the two pushing chains 22 wrap the elastic tube 13 on the inside.

[0046] When the handle 53 is turned in the opposite direction, the two first traction wheels 5 will drive the pusher to retract along the sealing sleeve 3 into the dumbbell shell 4 through friction. The pusher will move out of the first annular groove 51, and the end of the push chain 22 away from the transducer 1 will be wound up by the take-up wheel 43. As the pusher moves out of the first annular groove 51, it will separate to form two push chains 22. After being wound up, the push chain 22 has a smaller volume, achieving more stable folding, which prepares for the next pusher to move out of the inside of the sealing sleeve 3. Furthermore, an axial groove 45 is provided on the outer wall of the take-up bar 42. The take-up wheel 43 is slidably connected in the axial groove 45 through the axial block 46. In this way, the unwinding and winding positions of the take-up wheel 43 can change with the position of the push chain 22, and the unwinding and winding of the take-up wheel 43 is more stable.

[0047] This embodiment, through components such as dumbbell shell 4, crank handle 53, and winding wheel 43, not only allows operators to easily and accurately control the movement and testing of transducer 1, but also solves the problem of chaotic winding of push chain 22, improves the portability and safety of the equipment, significantly shortens the test hole switching time, and adapts to more testing scenarios.

[0048] Example 3: Teeth 54 are uniformly arranged circumferentially in the first annular groove 51; the arc-shaped outer wall of the arc block 2 is provided with a plurality of tooth grooves 24 along the axial direction; the teeth 54 can be inserted into the tooth grooves 24.

[0049] The cross section enclosed by the two first annular grooves 51 is adapted to the outer cross section of the pusher. The outer wall of the arc block 2 is provided with multiple toothed grooves 24 along the axial direction. The teeth 54 on the inner wall of the first annular groove 51 can be sequentially inserted into the corresponding toothed grooves 24. In this way, the teeth 54 can be driven to rotate during the rotation of the first traction wheel 5. The teeth 54 cooperate with the gear 52 to make the pusher stably pass through the sealing ring 31, avoiding slippage and making the transducer 1 move more stably in the test hole.

[0050] Example 4: The crank handle 53 is provided with a through hole 55; a movable rod 56 is movably connected inside the crank handle 55; the outer wall of the dumbbell shell 4 is provided with insertion holes 48 evenly around the rotation point of the crank handle 53; the movable rod 56 can be inserted into the insertion hole 48.

[0051] Turning the crank handle 53 can drive the first traction wheel 5 to rotate. During the rotation of the first traction wheel 5, the pusher will drive the pusher to pass through the sealing sleeve 3. The pusher will drive the transducer 1 to move along the test hole axis. After the position adjustment of the transducer 1 is completed, if it is necessary to keep the position of the transducer 1 unchanged, the movable rod 56 is inserted into the corresponding insertion hole 48, so that the crank handle 53 is locked, thus locking the first traction wheel 5, thus locking the length of the pusher extending from the inside of the sealing sleeve 3.

[0052] The embodiment 5: the dumbbell shell 4 is connected with two second traction wheels 6 through the U-shaped frame 49 away from the outer wall of the sealing sleeve 3; the end of the two second traction wheels 6 is fixedly connected with a second sprocket 61 (simplified in the figure); the end of the first traction wheel 5 is fixedly connected with a first sprocket 57 (simplified in the figure); the first sprocket 57 and the corresponding second sprocket 61 are drivingly connected through a chain 62 (simplified in the figure); the outer wall of the second traction wheel 6 is provided with a second annular groove 63 matched with the elastic tube 13.

[0053] In the process of rotating the first traction wheel 5 driven by the crank 53, the two first traction wheels 5 can rotate in opposite directions synchronously due to the meshing transmission of the gear 52 at the end of the two first traction wheels 5, and cooperate with the first annular groove 51 to control the transmission of the pusher, in the process of rotating the first traction wheel 5, the first sprocket 57 will be rotated, the first sprocket 57 will drive the corresponding second sprocket 61 through the chain 62, the second sprocket 61 will drive the second traction wheel 6 to rotate in the process of rotating, the two second traction wheels 6 will rotate with the first traction wheel 5, and the two second traction wheels 6 will pull the elastic tube 13 in the process of rotating, the pulling direction will change with the change of the first traction wheel 5, and the elastic tube 13 can enter and move out of the dumbbell shell 4 in time by pulling the elastic tube 13 in time, so that the elastic tube 13 can be separated and combined with the pusher chain 22 in time; the second sprocket 61 and the first sprocket 57 are of the same specification; the second traction wheel 6 can be driven to rotate by a separate motor, which is a second embodiment of the second traction wheel 6.

[0054] The embodiment 6: the contact position of the arc-shaped block 2 on the two pusher chains 22 is the contact surface 25; one of the contact surfaces 25 on the two pusher chains 22 is provided with an L-shaped clamping groove 26; the other contact surface 25 on the two pusher chains 22 is provided with a J-shaped groove 27; the J-shaped block 28 is slidingly connected in the J-shaped groove 27; the J-shaped block 28 is connected between the upper end and the inner wall of the J-shaped groove 27 through the tension spring 29; the J-shaped block 28 is provided with a guide surface 281 on the end close to the clamping groove 26 and inclined upward; the end of the J-shaped block 28 close to the clamping groove 26 can be clamped into the clamping groove 26; the J-shaped block 28 is made of magnetic material; the inner wall of the dumbbell shell 4 is provided with a magnet 40 and can magnetically attract the J-shaped block 28.

[0055] The clamping groove 26 and the J-shaped groove 27 in the arc-shaped block 2 are arranged away from the hinged block 23.

[0056] In the case of controlling the transducer 1 to approach the hole bottom of the test hole, the two first traction wheels 5 rotate to drive the two pushing chains 22 to merge together to form a pushing member, in the process of the two corresponding arc-shaped blocks 2 on the two pushing chains 22 approaching each other, the guide surface 281 on the J-shaped block 28 is extruded by the slot of the clamping slot 26 to slide along the J-shaped slot 27 against the tension spring 29, until the two corresponding arc-shaped blocks 2 merge together, the end of the J-shaped block 28 provided with the guide surface 281 enters the clamping slot 26, after the two arc-shaped blocks 2 merge together, the magnetic force acting on the J-shaped block 28 is in the same straight line and opposite to the tension spring 29, and the magnetic force is greater than the tension of the tension spring 29, in the process of the two merged arc-shaped blocks 2 gradually moving away from the magnet 40, the magnetic force acting on the J-shaped block 28 will decrease, under the tension of the tension spring 29, the end of the J-shaped block 28 provided with the guide surface 281 will be buckled into the clamping slot 26, realizing the connection of the two symmetrical arc-shaped blocks 2, so that the two pushing chains 22 are more stable after merging into a pushing member, and are not easy to bend and separate, so that the stability of the test equipment in the test process is improved; in the process of controlling the transducer 1 to approach the dumbbell shell 4, the two symmetrical and locked arc-shaped blocks 2 will gradually approach the magnet 40, under the condition that the magnetic attraction of the magnet 40 to the J-shaped block 28 is greater than the tension of the corresponding tension spring 29, the J-shaped block 28 will slide along the J-shaped slot 27 against the tension of the tension spring 29, the end of the J-shaped block 28 provided with the guide surface 281 will be unlocked from the clamping slot 26, realizing the unlocking of the two symmetrical arc-shaped blocks 2, so that the two symmetrical and unlocked arc-shaped blocks 2 will be smoothly separated with the rotation of the winding wheel 43.

[0057] In embodiment 7, the hinge block 23 is horizontally provided with a hinge hole 231; the hinge hole 231 movably connects a hinge rod 232; the hinge rod 232 is fixedly connected with the hinge slot 21; the width of the hinge block 23 is less than the width of the hinge slot 21; the upper surface of the arc-shaped block 2 is provided with a strip-shaped slot 20; one end of the strip-shaped slot 20 is close to the hinge block 23, and the other end is away from the hinge block 23; the lower surface of the arc-shaped block 2 is fixedly connected with a strip-shaped block 201; the length of the strip-shaped block 201 is less than the length of the strip-shaped slot 20.

[0058] During the outward folding of the push chain 22, two adjacent arc-shaped blocks 2 fold, and the lower surface of the upper arc-shaped block 2 disengages from the upper surface of the lower arc-shaped block 2. The strip block 201 moves away from the corresponding strip groove 20, releasing the axial movement restriction of the hinge block 23 along the hinge bar 232. The hinge block 23 can then move axially along the hinge bar 232 as the arc-shaped blocks 2 move. This allows the two folded arc-shaped blocks 2 to be slightly offset axially along the winding wheel 43. With multiple arc-shaped blocks 2 offset, they can be staggered and wound onto the winding wheel 43, avoiding low winding volume caused by winding at a single position on the winding wheel 43. This addresses the problem, thereby increasing the winding capacity of the winding wheel 43. During the inward flipping of the push chain 22, two adjacent arc-shaped blocks 2 fold inward and reset. The lower surface of the upper arc-shaped block 2 contacts the upper surface of the lower arc-shaped block 2. The lower arc-shaped block 2 is guided by the compression of the first annular groove 51 and aligns with the upper arc-shaped block 2. Thus, the strip block 201 on the upper arc-shaped block 2 can be inserted into the strip groove 20 on the lower arc-shaped block 2, which restricts the movement of the hinge block 23 along the axial direction of the hinge bar 232. This ensures that the upper and lower surfaces of the two adjacent arc-shaped blocks 2 remain stable after contact, meeting the stable pushing requirements of the pusher.

[0059] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An acoustic testing apparatus for use in a subterranean cavern, comprising a tester and a transducer connected to the tester by a wire; the transducer transmitting a wave and transmitting a signal to the tester over the wire after receiving the wave; characterised in that: The transducer is fixedly connected with the elastic pipe through the transducer seat; the elastic pipe is penetrated by the elastic liquid inlet pipe and the gas outlet pipe; one end of the liquid inlet pipe is connected with the outer wall of the transducer seat, and the other end is connected with the water pump; one end of the gas outlet pipe is extended to the top of the transducer through the extension pipe; the wire is connected with the transducer and the tester through the elastic pipe; the outer wall of the elastic pipe is sleeved with the pushing piece; the pushing piece is composed of two pushing chains which are symmetrically combined; the pushing chain is composed of a plurality of arc blocks which are hingedly connected in sequence; the uppermost arc block is fixedly connected with the transducer seat, the arc inner wall of the arc block is adapted to the outer wall of the elastic pipe; the arc outer wall of the arc block is provided with a hinged groove at a lower position; the arc block is fixedly connected with a hinged block at an upper end and a position close to the arc outer wall; the arc blocks at adjacent lower positions are rotationally connected in the hinged grooves of the arc blocks at adjacent upper positions through the hinged blocks; the pushing chain is folded inward to form a straight strip, and can be bent outward; the outer wall of the pushing piece is movably and sealingly sleeved with a sealing sleeve provided with a sealing ring; The sealing sleeve is fixedly connected with the dumbbell shell at an end away from the transducer seat; the dumbbell shell is provided with a shell hole in communication with the inner side of the sealing sleeve; the elastic pipe is movably and sealingly connected in the shell hole; the inner part of the dumbbell shell is in communication with the shell hole; the inner wall of the dumbbell shell is rotationally connected with two symmetrically arranged first traction wheels; the outer wall of the first traction wheel is provided with a first annular groove adapted to the outer wall of the pushing piece; the inner part of the dumbbell shell is rotationally connected with a winding rod through a torsion spring; the outer wall of the winding rod is connected with a winding wheel; the end of the pushing chain away from the transducer seat is fixedly connected with the winding wheel through a winding rope; the ends of the two first traction wheels are drivingly connected through gears; one of the gears is fixedly connected with a crank outside.

2. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The axial length of the winding rod is greater than the axial length of the winding wheel; the outer wall of the winding rod is provided with an axial groove along the axial direction; the axial groove is slidably connected with an axial block; the axial block is fixedly connected with the winding wheel; the dumbbell shell is fixedly connected with a handle at a side away from the sealing sleeve.

3. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The first annular groove is uniformly provided with teeth along the circumferential direction; the arc outer wall of the arc block is provided with a plurality of tooth grooves along the axial direction; the teeth can be clamped into the tooth grooves.

4. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The crank is provided with a movable hole; the movable rod is movably connected in the movable hole; the outer wall of the dumbbell shell is uniformly provided with a jack around the rotation point of the crank; the movable rod can be inserted into the jack.

5. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The outer wall of the dumbbell shell away from the sealing sleeve is rotationally connected with two second traction wheels through a U-shaped frame; the ends of the two second traction wheels are fixedly connected with second sprockets; the ends of the first traction wheels are fixedly connected with first sprockets; the first sprockets and the corresponding second sprockets are drivingly connected through chains; the outer wall of the second traction wheel is provided with a second annular groove adapted to the elastic pipe.

6. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The contact position of the arc-shaped block on the two push chains is a contact surface; one of the contact surfaces of the push chains is provided with an L-shaped clamping groove; the other contact surface of the push chains is provided with a J-shaped groove; a J-shaped block is slidably connected in the J-shaped groove; the J-shaped block is connected with the inner wall of the J-shaped groove through a tension spring at the upper end; the end of the J-shaped block close to the clamping groove is provided with a guide surface and is inclined upward; the end of the J-shaped block close to the clamping groove can be clamped into the clamping groove; the J-shaped block is made of magnetic material; the inner wall of the dumbbell shell is provided with a magnet and can magnetically attract the J-shaped block.

7. An acoustic testing apparatus for use in a subterranean cavern according to claim 6, wherein: The clamping groove and the J-shaped groove in the arc-shaped block are arranged away from the hinge block.

8. An acoustic testing apparatus for use in a subterranean cavern according to claim 1, wherein: The hinge block is provided with a hinge hole horizontally penetrating through; a hinge rod is movably connected in the hinge hole; the hinge rod is fixedly connected with the hinge groove; the width of the hinge block is smaller than the width of the hinge groove; the upper surface of the arc-shaped block is provided with a strip-shaped groove; one end of the strip-shaped groove is close to the hinge block and the other end is away from the hinge block; the lower surface of the arc-shaped block is fixedly connected with a strip-shaped block; the length of the strip-shaped block is smaller than the strip-shaped groove.

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