Inflatable dry hole sound wave test probe

Abstract

The invention particularly relates to an inflatable dry hole sound wave test probe. The probe comprises a sound wave probe assembly and a water storage device which are sequentially arranged in the front-back direction and detachably connected, the sound wave probe assembly comprises a vibration pickup assembly, a first plug, a second plug and a water storage bag, the first plug and the second plug are arranged at the two ends of the vibration pickup assembly respectively, and the vibration pickup assembly is sleeved with the water storage bag. The water storage device comprises a water storage device shell, a hollow shaft rod fixed in the water storage device shell in a penetrating mode and an inflation air bag arranged outside the hollow shaft rod in a sleeving mode, and a water storage space is formed between the inflation air bag and the water storage device shell. The front end and the rear end of the water storage device shell are provided with a water passing opening communicated with the water storage space and an inflation opening communicated with the inflation air bag respectively, and the water passing opening is communicated with the water storage bag in a sealed mode. The water storage device and the water storage bag are communicated with each other, water can be injected into the water storage bag by inflating the inflatable air bag, the water is recycled to the water storage space after the test is finished, and the device can be suitable for drilling test work in all directions.

Description

Technical Field

[0001] The invention relates to the technical field of in-hole acoustic wave testing equipment for geophysical exploration, and in particular to an inflatable dry hole acoustic wave testing probe. Background Art

[0002] At present, drilling exploration is often used in engineering geological surveys, and the workload of in-hole acoustic wave testing is very large. The following difficulties will be encountered during acoustic wave testing: When conducting acoustic wave testing in a borehole, the vibrator is fully coupled with the hole wall with water. If it encounters an upward inclined hole or a horizontal hole, it is difficult to preserve water in the hole. The rock mass of some downward inclined holes and plumb holes is broken, and there is often no water in the hole, which makes it impossible to complete the in-hole acoustic wave testing work.

[0003] The acoustic dry hole test probes currently on the market generally have three signal lines, one connected to the ultrasonic transmitting probe, and the other two connected to two ultrasonic receiving probes, all for "upward inclined holes". The characteristics of this type of probe are: during the test, a capsule is installed under the probe, and the bottom of the probe is sealed by inflating the capsule, and then water is pumped into the hole on the upper part of the capsule through the upper water pipe. When the water submerges the top probe, the three probes are fully coupled with the hole wall, and the test can be carried out; after the test is completed, the air in the capsule is released, the capsule is detached from the hole wall, and the water flows down naturally by gravity, and then the probe can be moved to the next test point. Since the hole needs to be frequently filled and drained, the staff under the hole are often drenched, especially in winter. The above test method sometimes causes the air bag to be squeezed due to excessive water injection, and sometimes causes poor coupling effect due to insufficient water injection. The overall operation is cumbersome and complicated, and the promotion effect is not good.

[0004] In the prior art, for example, a Chinese invention patent application with application announcement number CN114994747A discloses “a gravity-type dry-hole acoustic wave probe”, which includes a vibrator, a bladder, an inlet and outlet pipe, a plug, a porous connector and a vibrator signal line; the acoustic wave probe is sequentially provided with a first vibrator, a second vibrator and a third vibrator, the first vibrator transmits a signal, and the other two receive a signal, and the vibrators are connected by screws through a porous connector; the first plug and the third vibrator are respectively connected by screws at the free ends of the first vibrator and the third vibrator Two plugs, a vibration pickup, a porous connector and a bag are provided on the outside of the plug, and two ends of the bag are respectively closed and connected to the side outer peripheral walls of the two plugs, and the inlet and outlet pipes and the vibration pickup signal line pass through the first plug into the inner cavity of the bag, and water is injected and discharged into the bag through the inlet and outlet pipes. The water injection makes the bag contact with the hole wall, and the vibration pickup realizes the upward inclined dry hole acoustic wave test through water coupling. After the test, the water in the bag is discharged through the inlet and outlet pipes by gravity to avoid the tester from being drenched. In addition, the bag is in contact with the hole wall to ensure the coupling effect and the survey accuracy.

[0005] However, the gravity-type dry hole sonic probe is only applicable to upper inclined holes. If the gravity-type dry hole sonic probe is used to test lower inclined holes or plumb holes, the water in the bag is difficult to drain or extract, which will make the sonic probe unable to move and difficult to pull out from the hole. The gravity-type dry hole sonic probe is not applicable to lower inclined holes or plumb holes. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an inflatable dry hole acoustic wave test probe, in which the water storage space of the water storage device and the water storage bag are interconnected, and the water stored in the water storage device can be squeezed into the water storage bag by inflating the inflatable airbag to realize the coupling between the vibration pickup and the hole wall. After the test is completed, the air in the inflatable airbag is released and the water flows back to the water storage space. The probe can be applied to drilling tests of different depths in all directions.

[0007] In view of the above technical problems, the technical solution provided by the present invention is an inflatable dry hole sonic wave test probe, comprising a sonic wave probe assembly and a water reservoir which are sequentially arranged and detachably connected along the front-to-back direction.

[0008] The acoustic wave probe assembly includes a vibration pickup assembly, a first plug and a second plug respectively arranged at two ends of the vibration pickup assembly, and a water storage bag sleeved outside the vibration pickup assembly, and the two ends of the water storage bag are respectively sealed and fixed to the first plug and the second plug;

[0009] The water reservoir includes a water reservoir shell, a hollow shaft rod inserted and fixed in the water reservoir, and an inflatable airbag sleeved on the outside of the hollow shaft rod. The signal line of the vibration pickup assembly extends backward through the hollow shaft rod. The two ends of the inflatable airbag are respectively sealed and fixed to the two ends of the water reservoir shell, and a water storage space is formed between the water reservoir shell and the water reservoir shell. The front and rear ends of the water reservoir shell are respectively provided with a water port connected to the water storage space and an inflation port connected to the inflatable airbag. The water port is sealed and connected to the water storage bag.

[0010] Furthermore, the water tank shell includes a columnar shell, and the front and rear ends of the columnar shell are respectively provided with a first water tank plug and a second water tank plug, and the centers of the first water tank plug and the second water tank plug are both provided with a through hole, and the hollow shaft rod passes through the two through holes in sequence from back to front and is sealed and fixed to the two through holes.

[0011] Furthermore, the opposite ends of the first plug of the water reservoir and the second plug of the water reservoir are provided with inner extension rings concentric with the penetration hole, and the two ends of the inflatable airbag are respectively penetrated and sealed and fixed on the corresponding inner extension rings.

[0012] Further, the water inlet is arranged on the first plug of the water reservoir, the air filling port is arranged on the second plug of the water reservoir, and the air filling port is arranged on the portion of the second plug of the water reservoir located within the inner extension ring thereof.

[0013] Furthermore, a water inlet is provided at a position of the second plug of the water storage vessel corresponding to the water storage space, and the water inlet is arranged concentrically with the water outlet and is connected to the water storage space.

[0014] Furthermore, a signal amplifier is arranged between the acoustic wave probe assembly and the water tank, and the signal amplifier includes a columnar amplifier housing and an amplifier element arranged in the amplifier housing. The two opposite ends of the acoustic wave probe assembly and the water tank are respectively detachably fixed at the two ends of the amplifier housing. The signal line includes a vibration pickup signal line and an amplifier signal line. The vibration pickup signal line connects the vibration pickup assembly and the signal amplifier, and the amplifier signal line extends backward to connect to the receiving device.

[0015] Furthermore, a connecting pipe is provided at the front end of the water storage housing, a connector is provided at the front end of the connecting pipe, and the connecting pipe is fixedly mounted on the amplifier housing through the connector.

[0016] Furthermore, a first connecting hole and a second connecting hole are respectively provided on the second plug and the connector, the first connecting hole, the second connecting hole and the water outlet are concentric and collinear, the first connecting hole is connected to the interior of the water storage bag, and the first connecting hole, the second connecting hole and the water outlet are connected through an inlet and outlet pipe.

[0017] Furthermore, an air outlet hole penetrating along the front-to-back direction is provided in the middle of the first plug, a lifting eye screw is threadedly connected to the front end of the air outlet hole, and the lifting eye screw is sealed and matched with the air outlet hole.

[0018] Furthermore, a guide is provided at the rear end of the water storage tank shell, and the guide is a conical structure with a larger front and a smaller rear. The rear end of the guide is fixedly connected to the hollow shaft rod, and a first guide port is opened on the middle circumference of the guide at the position corresponding to the inflation port. An air inlet and exhaust pipe is passed through the first guide port, and the front end of the air inlet and exhaust pipe is connected to the inflation port.

[0019] Furthermore, the vibration pickup assembly includes a first vibration pickup, a second vibration pickup and a third vibration pickup arranged in sequence along the front-to-back direction, and a first porous connector and a second porous connector are detachably connected between the first vibration pickup and the second vibration pickup, and between the second vibration pickup and the third vibration pickup, respectively.

[0020] Furthermore, the first vibration pickup and the second vibration pickup, as well as the second vibration pickup and the third vibration pickup are connected by high-strength fibers.

[0021] Furthermore, the rear end of the hollow shaft extends out of the water tank housing and is provided with a wire groove, through which the signal line extends backwards, and the rear end of the hollow shaft is fixedly provided with a columnar nut, on which a push rod is threadedly connected.

[0022] Furthermore, the inner surface of the water storage bag is rough and the outer surface is smooth.

[0023] Furthermore, explosion-proof capsules are respectively provided at both ends of the water storage bag.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] (1) The rear of the sonic probe assembly is connected to a water reservoir, and a water storage space is formed between the inflatable airbag of the water reservoir and the outer shell of the water reservoir. In actual use, the water reservoir follows the sonic probe assembly into the hole. When the sonic probe assembly reaches the specified position, it is inflated through the inflation port, and the inflatable airbag expands, squeezing the water in the water storage space into the water storage bag through the water inlet, so that the water storage bag is in full contact with the hole wall, and the vibration pickup is coupled with the hole wall through the water, so that the sonic wave test can be carried out. After the data collection is completed, the inflation port is deflated, and the inflatable airbag is retracted, so that the water in the water storage bag flows back to the water storage space, and the water storage bag is retracted and separated from the hole wall, and the sonic wave probe can be moved to the next test point. The present invention can perform sonic wave testing at a drilling angle of any angle, and there is no need to set up an additional water pump and water source. It only needs to be inflated and deflated, which is convenient and fast.

[0026] The water storage container with a rigid shell is arranged at the rear of the sonic wave probe assembly, which can facilitate the sonic wave probe assembly to be placed in the upper inclined hole. The two can be detachably connected, which is convenient for carrying and transportation.

[0027] (2) For deep boreholes, the weak signal output by the vibration pickup tends to become even weaker when transmitted to the receiving device through a long signal line. The signal amplifier can be used to denoise, filter and amplify the output signal of the vibration pickup component, and convert it into a differential signal for external output, ensuring that the received signal is not distorted during long-distance transmission, improving the quality and recognizability of the signal, and thus more accurately obtaining the acoustic wave information in the hole, ensuring the accuracy and reliability of the survey data, and facilitating the precise analysis of geological structure and other information in engineering geological surveys.

[0028] (3) A water inlet is provided on the second plug of the water storage container so that the water in the water storage space can be released when not in use, which is convenient for transportation and carrying.

[0029] (4) A first connecting hole and a second connecting hole are formed on the connector and the second plug, which are concentric, collinear and interconnected, and are connected to the water outlet through the water inlet and outlet pipes, thereby forming a perfect water flow path, so that the water between the water storage bag and the water reservoir can be exchanged stably and efficiently, which facilitates the precise control of the water volume in the water storage bag, ensures the coupling effect between the sonic probe and the hole wall under different drilling conditions, and ensures that the water volume is appropriate to prevent the water storage bag from bursting.

[0030] (5) The conical guide facilitates the extraction of the inflatable dry hole sonic test probe from the test hole.

[0031] (6) The inner surface of the water storage bag is designed to be rough, which can increase the friction between the water storage bag and the plug assembly, ensuring that the water storage bag is not easy to fall off. The outer surface of the water storage bag is designed to be smooth and flat, which is conducive to the coupling of the columnar water storage bag with the hole wall and improves the signal quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structural appearance of an inflatable dry hole acoustic wave test probe in Example 1 of the present invention.

[0033] Figure 2 It is a cross-sectional view of an inflatable dry hole acoustic wave test probe in Example 1 of the present invention.

[0034] Figure 3 It is a schematic diagram of the structural appearance of the acoustic wave probe assembly and the signal amplifier in Example 1 of the present invention.

[0035] Figure 4 It is a cross-sectional view of the acoustic wave probe assembly and the signal amplifier in Example 1 of the present invention.

[0036] Figure 5 It is a schematic diagram of the structural appearance of the water storage device, the connecting pipe and the guide device in Example 1 of the present invention.

[0037] Figure 6 It is a cross-sectional view of the water storage container in Example 1 of the present invention.

[0038] Figure 7 It is a cross-sectional view of the first plug in Example 1 of the present invention.

[0039] Figure 8 It is a schematic diagram of the structural appearance of the second plug in Example 1 of the present invention.

[0040] Fig. 9 It is a first-direction axonometric view of the first plug of the water storage tank in Example 1 of the present invention.

[0041] Fig.10 It is a second direction axonometric view of the first plug of the water storage tank in Example 1 of the present invention.

[0042] Fig.11 It is a first direction axonometric view of the second plug of the water storage tank in Example 1 of the present invention.

[0043] Fig.12 It is a second direction axonometric view of the second plug of the water storage tank in Example 1 of the present invention.

[0044] Fig.13 It is a schematic diagram of the structure of the connector in Example 1 of the present invention.

[0045] Fig.14 It is a diagram showing the composition of the amplifier element in Embodiment 1 of the present invention.

[0046] Fig.15 It is a composition diagram of the filter in Example 1 of the present invention.

[0047] Fig.16 It is a schematic diagram of the structure and appearance of the vibration pickup assembly and the signal amplifier in Example 1 of the present invention.

[0048] In the figure: 1, sonic probe assembly; 11, vibration pickup assembly; 111, first vibration pickup; 112, second vibration pickup; 113, third vibration pickup; 114, first porous connector; 115, second porous connector; 116, high-strength fiber; 121, first plug; 1211, air outlet; 122, second plug; 123, protective ring; 124, eye screw; 125, explosion-proof capsule; 126, first connection hole; 13, water storage bag; 15, signal line; 151, vibration pickup signal line; 152, amplifier signal line;

[0049] 2. water storage tank; 21. water storage tank shell; 211. columnar shell; 212. first plug of water storage tank; 213. second plug of water storage tank; 214. through hole; 215. inner extension ring; 22. water inlet; 23. air filling port; 24. water inlet; 25. hollow shaft; 251. wire groove; 26. first capillary steel tube; 27. second capillary steel tube; 28. third capillary steel tube; 29. ​​inflatable airbag; 210. water storage space;

[0050] 3. Connecting pipe; 4. Connector; 41. Second connecting hole; 5. Inlet and outlet pipe; 6. Water inlet pipe; 7. Inlet and outlet pipe;

[0051] 8. Guide; 9. Columnar nut; 10. Signal amplifier; 101. Amplifier housing; 102. Amplifier element; 1021. Preamplifier; 1022. Filter; 1023. Differential amplifier; 1024. Matching circuit; 1025. High-pass filter; 1026. Band-pass filter; 1027. Low-pass filter. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application: Specific embodiment 1:

[0054] refer to Figures 1 to 16 The inflatable dry hole sonic wave test probe (hereinafter referred to as the test probe) of the present invention comprises a sonic wave probe assembly 1 and a water reservoir 2 which are sequentially arranged and detachably connected along the front-back direction, wherein the sonic wave probe assembly 1 comprises a vibration pickup assembly 11, a first plug 121 and a second plug 122 respectively arranged at both ends of the vibration pickup assembly 11, a high-strength fiber 116 connecting adjacent vibration pickups, and a water storage bag 13 sleeved on the outside of the vibration pickup assembly 11, and the two ends of the water storage bag 13 are respectively sealed and fixed to the first plug 121 and the second plug 122, explosion-proof capsules 125 are sleeved on the outer sides of the two ends of the water storage bag 13, and the first plug 121 is provided with an air outlet 1211 and a lifting eye screw 124. In this way, a closed space is formed in the water storage bag 13. In actual use, water is firstly filled into the water storage bag 13 to exhaust the internal air, and the test probe can be inserted into the test borehole after the lifting eye screw 124 is screwed on. Continue to inject water into the water storage bag, the water storage bag 13 expands and fully contacts the hole wall, the vibration pickup assembly 11 is coupled with the hole wall through the water, and then the acoustic wave test can be performed on the point.

[0055] Moreover, in this embodiment, the first plug 121, the second plug 122, the vibration pickup assembly 11 and the water storage bag 13 are arranged concentrically, so that the vibration pickup assembly 11 can be located in the middle of the borehole during testing, thereby enhancing the strength of the first arrival signal of the longitudinal wave and improving the signal quality.

[0056] In this embodiment, the water reservoir 2 includes a water reservoir housing 21, a hollow shaft 25 inserted and fixed in the water reservoir housing 21, and an inflatable airbag 29 sleeved on the outside of the hollow shaft 25. The signal line 15 of the vibration pickup assembly 11 extends backward through the hollow shaft 25 to connect with external equipment, and the two ends of the inflatable airbag 29 are respectively sealed and fixed to the two ends of the water reservoir housing 21, and a water storage space 210 is formed between the water reservoir housing 21, and water is stored in the water storage space 210. The front and rear ends of the water reservoir housing 21 are respectively provided with a water inlet 22 connected to the water storage space 210 and an air inlet 23 connected to the inflatable airbag 29. The water inlet 22 is sealed and connected to the water storage bag 13.

[0057] The rear part of the acoustic wave probe assembly 1 is connected to the water reservoir 2, and a water storage space 210 is formed between the inflatable airbag 29 of the water reservoir 2 and the water reservoir shell 21. In actual use, the test probe goes deep into the hole. When the test probe reaches the specified position, it is inflated through the inflation port 23, the inflatable airbag 29 expands, and the water in the water storage space 210 is squeezed and enters the water storage bag 13 through the water outlet 22, so that the water storage bag 13 is in full contact with the hole wall. The water storage bag 13 is explosion-proof protected by the explosion-proof capsule 125, and the vibration pickup is coupled with the hole wall through water, so that the acoustic wave test can be carried out. After the data collection is completed, the inflation port 23 is deflated, and the inflatable airbag 29 retracts, so that the water in the water storage bag 13 flows back to the water storage space 210, the water storage bag 13 retracts and separates from the hole wall, and the acoustic wave probe can be moved to the next test point. The test probe can perform sonic testing on boreholes at any angle, and there is no need to set up an additional water pump or water source. It only needs to be inflated and deflated, which is convenient and fast for testing.

[0058] The water storage container with a rigid shell is arranged at the rear of the sonic wave probe assembly, which can facilitate the sonic wave probe assembly to be placed in the upper inclined hole. The two can be detachably connected, which is convenient for carrying and transportation.

[0059] Specifically, in this embodiment, Figure 2 , 3 As shown, the vibration pickup assembly 11 includes three vibration pickups, namely a first vibration pickup 111, a second vibration pickup 112 and a third vibration pickup 113 arranged in sequence along the front-to-back direction, wherein the third vibration pickup 113 is used to transmit signals, and the first vibration pickup 111 and the second vibration pickup 112 are used to receive signals.

[0060] Adjacent vibration pickups are connected by a porous connector, which includes a first porous connector 114 detachably connected between the first vibration pickup 111 and the second vibration pickup 112, and a second porous connector 115 between the second vibration pickup 112 and the third vibration pickup 113. Specifically, the first porous connector 114 and the second porous connector 115 are both cylindrical thin-walled cavity tube structures, and a plurality of gaps are opened on the side walls thereof. The gaps can prevent the second vibration pickup 112 and the third vibration pickup 113 from receiving interference signals that are directly transmitted along the porous connector, thereby improving the signal-to-noise ratio.

[0061] In this embodiment, if Fig.16As shown, the front and rear ends of the vibration pickup are respectively provided with an extension section, and the front and rear ends of the porous connector are respectively inserted into the corresponding extension section of the vibration pickup and fixedly connected by screws. In this embodiment, the first porous connector 114 and the second porous connector 115 are both nylon connecting parts. The wave velocity of nylon material is relatively lower than that of rigid material. In order to prevent the water storage bag 13 from breaking the porous connector between adjacent vibration pickups when expanding, high-strength fibers 116 are also connected between adjacent vibration pickups. Specifically, three high-strength fibers 116 are arranged in an axial annular array between adjacent vibration pickups to increase the overall service life of the sound wave probe. At the same time, when the water storage bag 13 is filled with water and expands, the nylon porous connector is easily stretched, which leads to a longer distance between adjacent vibration pickups and a long propagation time of sound waves. Therefore, the use of high-strength fibers 116 can also prevent the distance between adjacent vibration pickups from changing, resulting in inaccurate calculated wave velocity.

[0062] In this embodiment, if Figure 4 , 7 As shown, the rear part of the first plug 121 is provided with a notch adapted to the extension section of the first vibration pickup 111, and the notch is sleeved on the extension section of the front end of the first vibration pickup 111 and fixedly connected by screws. An air outlet 1211 is provided in the middle of the first plug 121, which is through in the front-to-back direction. The air outlet 1211 is connected to the water storage bag 13. The front end of the air outlet 1211 is threadedly connected with a lifting eye screw 124, and the lifting eye screw 124 and the air outlet 1211 are sealed by a sealing gasket. In this way, when actually using it, first arrange the front end of the sonic probe assembly 1 upward, unscrew the lifting eye screw 124, and at the same time, fill water into the water storage bag 13. When water overflows from the upper end of the first plug 121, it indicates that the air inside the water storage bag 13 has been emptied.

[0063] In this embodiment, the outer contour of the first plug 121 includes a large diameter section, a middle diameter section and a small diameter section from front to back, the front end of the water storage bag 13 is sleeved on the middle diameter section, and an explosion-proof capsule 125 is provided to fix and seal to prevent falling off, and the explosion-proof capsule 125 can prevent the water storage bag 13 from suddenly becoming larger at a fixed position when the water storage bag 13 is filled with water and expanded, causing the water storage bag 13 to burst. The outer periphery of the small diameter section is flush with the outer periphery of the first vibration pickup 111, and the extension section of the first vibration pickup 111 is inserted into the inner ring of the small diameter section and fixedly connected with screws.

[0064] By utilizing the diameter difference between the small diameter section and the middle diameter section of the first plug 121, the water storage bag 13 and the vibration pickup assembly 11 can be arranged at intervals, so as to avoid the screws used for fixing each vibration pickup and the porous connector, the vibration pickup assembly and the first plug and the second plug from directly contacting the water storage bag 13, which is beneficial to protecting the water storage bag 13. The outer periphery of the large diameter section is flush with the outer periphery of the explosion-proof capsule 125, and a tapered structure is provided at the front of the large diameter section to facilitate entry and exit of the test borehole.

[0065] In this embodiment, if Figure 2 , 3 As shown in , 4, a signal amplifier 10 is arranged between the sound wave probe assembly 1 and the water tank 2. The signal amplifier 10 includes a columnar amplifier housing 101 and an amplifier element 102 arranged in the amplifier housing 101. The sound wave probe assembly 1 and the water tank 2 are fixed at both ends of the amplifier housing 101. The signal line 15 includes a vibration pickup signal line 151 and an amplifier signal line 152. The vibration pickup signal line 151 is connected to the signal amplifier 10, and the amplifier signal line 152 extends backward to connect to an external receiving device.

[0066] Specifically, in this embodiment, the front end of the amplifier housing 101 is provided with a mounting hole adapted to the extended section of the third vibration pickup 113, the outer diameter of the amplifier housing 101 is adapted to the outer diameter of the vibration pickup, the rear end of the third vibration pickup 113 penetrates into and is fixedly connected to the front end of the amplifier housing 101 by screws, and the vibration pickup signal line 151 is passed through the mounting hole into the amplifier housing 101 and is connected to the amplifier element 102 inside it.

[0067] The inner diameter of the second plug 122 is adapted to the outer diameter of the amplifier housing 101, and the outer diameter of the second plug 122 is adapted to the middle diameter section of the first plug 121. The second plug 122 is sleeved and removably fixed to the front of the amplifier housing 101 by screws, and is sealed with the amplifier housing 101. A protective ring 123 is fixedly provided on the outer periphery of the rear portion of the second plug 122 to form a variable diameter structure. The rear end of the water storage bag 13 is sleeved on the second plug 122 and sealed and fixed by an explosion-proof capsule 125. At the same time, the outer periphery of the explosion-proof capsule 125 is aligned with the outer periphery of the protective ring 123 to ensure that the water storage bag 13 is an equal-diameter columnar structure.

[0068] Preferably, in the present embodiment, the inner surface of the water storage bag 13 is roughened, which can increase the friction between the water storage bag 13 and the plug assembly, thereby ensuring that the water storage bag 13 is not easy to fall off.

[0069] The outer surface of the water storage bag 13 is smooth and flat, which is conducive to the coupling of the columnar water storage bag 13 with the hole wall, improving the signal quality, and at the same time reducing the friction resistance between the water storage bag 13 and the hole wall when moving in the borehole, facilitating the insertion and removal of the test probe and reducing the risk of the water storage bag being scratched.

[0070] In this embodiment, the amplifier signal line 152 is a twisted pair, such as Fig.14 , 15 As shown, the amplifier element 102 includes a preamplifier 1021, a filter 1022, a differential amplifier 1023 and a matching circuit 1024. In this way, the signal of the ceramic tube receiving the oscillator can be de-noised and amplified, and then converted into a balanced differential signal, and the received weak signal can be transmitted over a longer distance without distortion using a twisted pair cable, thereby ensuring the quality of deep hole detection.

[0071] Specifically, in this embodiment, the input and output ends of the preamplifier 1021, the filter 1022, and the differential amplifier 1023 are connected in series in sequence, the input end of the preamplifier 1021 is connected to the output end of the pickup signal line 151, and the matching circuit 1024 is set at the output end of the differential amplifier 1023 and connected to the amplifier signal line 152. In this way, the preamplifier 1021 is used to receive the weak signal from the ceramic tube of the pickup assembly 11, and amplify it. The amplified signal enters the filter 1022 to remove the noise component in the signal and improve the signal quality. The filtered signal enters the differential amplifier 1023 to complete the differential signal conversion. The converted balanced differential signal adjusts the output impedance of the signal through the matching circuit 1024 to match it with the characteristic impedance of the twisted pair, so that the signal can be transmitted in the twisted pair with minimal loss and distortion.

[0072] In this way, due to the anti-interference of the differential signal and the good transmission conditions after matching, when the signal is transmitted on the twisted pair, the common mode noise is suppressed and the distortion is small, so that it can be transmitted without distortion over a longer distance, ensuring that the signal can still be effectively received and processed after long-distance transmission.

[0073] In this embodiment, if Fig.15 As shown, the filter 1022 includes a high-pass filter 1025, a band-pass filter 1026 and a low-pass filter 1027 which are connected in series in sequence. The amplified signal input from the preamplifier 1021 first enters the high-pass filter 1025 to filter out low-frequency interference, and then passes through the band-pass filter 1026 to further filter out the target sound wave frequency band. Finally, the low-pass filter 1027 is used to remove the residual high-frequency noise, thereby maximizing the signal quality and realizing fine filtering processing.

[0074] In this embodiment, if Figure 5 , 6As shown, the water tank shell 21 includes a columnar shell 211, and the front and rear ends of the columnar shell 211 are respectively provided with a first water tank plug 212 and a second water tank plug 213, wherein the centers of the first water tank plug 212 and the second water tank plug 213 are both provided with a through hole 214, and the hollow shaft 25 passes through the two through holes 214 from back to front in sequence, and is welded with the two through holes 214 to achieve fixation and sealing.

[0075] like Fig. 9 , 10 As shown in Figures 11 and 12, an inner extension ring 215 concentric with the penetration hole 214 is provided at the opposite ends of the first plug 212 and the second plug 213 of the water storage tank, and the two ends of the inflatable airbag 29 are respectively penetrated and sealed and fixed on the corresponding inner extension ring 215. An inflatable space is formed between the inflatable airbag 29 and the hollow shaft 25. Among them, the water inlet 22 is provided on the end surface of the first plug 212 of the water storage tank, and the water inlet 22 is connected to the water storage space 210 between the inflatable airbag 29 and the water storage shell 21.

[0076] The air filling port 23 is arranged on the end surface of the second plug 213 of the water storage tank, and specifically, the air filling port 23 is arranged on the portion of the second plug 213 of the water storage tank located inside its inner extension ring 215, that is, the air filling port 23 is arranged between the through hole 214 of the second plug 213 of the water storage tank and the inner circumference of the inner extension ring 215. In this way, the air filling port 23 is connected to the inflation space, and the air filling port 23 is in conduction with the inside of the inflation airbag 29.

[0077] In this embodiment, a water inlet 24 is provided at the position of the second plug 213 of the water storage device corresponding to the water storage space 210, and the water inlet 24 is arranged concentrically with the water passage 22. In this way, water can be introduced into and discharged from the water storage bag 13 and the water storage space 210 through the water inlet 24.

[0078] In this embodiment, a connecting pipe 3 is provided at the front end of the water storage housing 21 , a connector 4 is provided at the front end of the connecting pipe 3 , and the connecting pipe 3 is fixedly mounted on the amplifier housing 101 via the connector 4 .

[0079] Specifically, the connecting pipe 3 is a steel pipe, which is welded and fixed at the front end of the first plug 212 of the water tank. The outer diameter of the connecting pipe 3 is adapted to the outer diameter of the water tank shell 21. A first capillary steel tube 26 is arranged on the front side of the first plug 212 of the water tank corresponding to the position of the water port 22. The first capillary steel tube 26 is arranged inside the connecting pipe 3.

[0080] The outer periphery of the connector 4 is a stepped diameter-changing structure that is larger at the front and smaller at the rear. The inner diameter of the connector 4 is adapted to the outer diameter of the amplifier housing 101. The connector 4 is entirely sleeved on the rear of the amplifier housing 101. The rear small-diameter section of the connector 4 is inserted into the inner cavity of the connecting tube 3. A fastening hole is provided at the overlapping position of the connecting tube 3 and the connector 4. The connecting tube 3 and the connector 4 are fastened to the rear of the amplifier housing 101 by fixing screws passing through the fastening holes.

[0081] In this embodiment, preferably, the connector 4 and the second plug 122 are disposed at the front and rear sides of the amplifier housing 101, and the first connection hole 126 and the second connection hole 41 are respectively provided on the second plug 122 and the connector 4, and the first connection hole 126 and the second connection hole 41 are both through holes, the first connection hole 126, the second connection hole 41 and the water outlet 22 are concentric and collinear, and the first connection hole 126 is in communication with the interior of the water storage bag 13. The front end of the first capillary steel tube 26 of the water outlet 22 is sealed and connected with the inlet and outlet pipe 5, and the front end of the inlet and outlet pipe 5 passes through the second connection hole 41 and is in communication with the first connection hole 126 of the second plug 122. Specifically, a rubber hose is provided at the front end of the first capillary steel tube 26, and the inlet and outlet pipe 5 is an inlet and outlet rubber hose, and the rubber hose is connected with the inlet and outlet rubber hose through a quick connection. The first connection hole 126, the second connection hole 41 and the water outlet 22 are connected through the inlet and outlet pipe 5, so that the water storage space 210 is in communication with the water storage bag 13. At the same time, the protective ring 123 at the rear of the second plug 122 can be used to protect the water inlet and outlet pipes 5.

[0082] In this embodiment, if Fig.11 , 12 As shown, a second capillary steel tube 27 and a third capillary steel tube 28 are respectively provided at the positions corresponding to the inflation port 23 and the water inlet 24 at the rear end of the second plug 213 of the water storage tank, Figure 5 The second capillary steel tube 27 is connected to the air inlet and outlet pipe 7, and the third capillary steel tube 28 is connected to the water inlet pipe 6. The rear end of the air inlet and outlet pipe 7 is extended to connect the external inflation device, and the water inlet pipe 6 is used to inject water into the water storage bag 13 and the water storage space 210 when the hole test is not performed.

[0083] In this embodiment, preferably, the rear end of the hollow shaft 25 extends out of the water storage housing 21 and is provided with a wire groove 251, through which the signal line 15 extends backward, and a columnar nut 9 is fixedly provided at the rear end of the hollow shaft 25, and a push rod is threadedly connected to the columnar nut 9. The push rod is used to drive the test probe to move in the hole.

[0084] In this embodiment, if Figure 5As shown, a conical guide 8 with a larger front and a smaller rear is fixedly installed at the rear end of the water storage tank 2. The guide 8 is entirely passed through the hollow shaft 25 and the wire groove 251 is exposed. The front end of the guide 8 is fixedly welded to the rear end of the second plug 213 of the water storage tank, and the second capillary steel tube 27 and the third capillary steel tube 28 are welded. A first guide hole and a second guide hole are respectively opened on the central circumference of the guide 8 at positions corresponding to the inflation port 23 and the water inlet 24, and the water inlet pipe 6 and the air inlet and exhaust pipe 7 extend backwards through the corresponding guide holes.

[0085] How to use this application:

[0086] Step 1: Connect the signal line 15 to the external instrument.

[0087] Step 2: Use quick-connect to connect the rubber hose connected to the first capillary steel tube 26 to the water inlet and outlet rubber hoses on the front side of the water reservoir 2 to achieve communication between the water reservoir 2 and the water storage bag 13.

[0088] Step 3: Insert the rear end of the connector 4 into the front end of the connecting tube 3 and fasten it with the fixing screws to complete the assembly of the test probe.

[0089] Step 4: Before placing the test probe, make the front end of the acoustic wave probe assembly 1 higher than the water reservoir 2, remove the eye screw 124, and inject water into the water reservoir 2 through the water inlet pipe 6. When water flows out from the front end of the first plug 121, the water reservoir 2 and the water storage bag 13 are filled with water, and the air between the vibration pickup assembly 11 and the water storage bag 13 is also exhausted. At this time, the water injection is completed, the water inlet 24 is blocked, and the eye screw 124 is screwed on to complete the sealing to ensure that the water in the test probe does not flow out.

[0090] Step 5: Use a quick connector to connect the high-pressure air pipe connected to the air pump and the air inlet and outlet pipes 7 on the right side of the water storage tank 2.

[0091] Step 6: Send the inflatable dry hole sonic test probe to the test location.

[0092] Step 7: Use an air pump to inflate the high-pressure air pipe, so that the water in the water reservoir 2 is squeezed into the water storage bag 13, and the water storage bag 13 is in full contact with the hole wall. At this time, the test can be carried out.

[0093] Step 8: After the test is completed, the air is discharged, and the water in the water storage bag 13 flows back to the water reservoir 2. The water storage bag 13 is separated from the hole wall, and the inflatable dry hole acoustic wave test probe can be moved to the next test point. Repeat steps 7 and 8 until the test is completed.

[0094] Step 9: After the test is completed, pull out the test probe, open the eye screw 124 and the water inlet 24, and let all the internal water flow out freely.

[0095] Step 10: Remove the screws connecting the water reservoir 2 and the sonic probe assembly 1, separate the water reservoir 2 and the sonic probe assembly, and wind up the line to finish the work.

[0096] In summary, the test probe of the present invention can be applied to the acoustic wave testing of boreholes without water in all directions. No water source is needed on site, only an air pump is needed, and the application range is wide. The water reservoir 2 and the acoustic wave probe assembly 1 can be freely disassembled and assembled simply, which is convenient for transportation and practical. The signal amplifier 10 can ensure that the weak signal of the vibration pickup assembly 11 is transmitted to a longer distance without distortion, thereby improving the accuracy and quality of deep hole testing.

[0097] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0098] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0099] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

Claims

1. An inflatable dry hole acoustic wave test probe, characterized in that: It includes an acoustic wave probe assembly and a water reservoir which are sequentially arranged in the front-to-back direction and are detachably connected. The acoustic wave probe assembly includes a vibration pickup assembly, a first plug and a second plug respectively arranged at two ends of the vibration pickup assembly, and a water storage bag sleeved outside the vibration pickup assembly, and the two ends of the water storage bag are respectively sealed and fixed to the first plug and the second plug; The water reservoir includes a water reservoir shell, a hollow shaft rod inserted and fixed in the water reservoir, and an inflatable airbag sleeved on the outside of the hollow shaft rod. The signal line of the vibration pickup assembly extends backward through the hollow shaft rod. The two ends of the inflatable airbag are respectively sealed and fixed to the two ends of the water reservoir shell, and a water storage space is formed between the water reservoir shell and the water reservoir shell. The front and rear ends of the water reservoir shell are respectively provided with a water port connected to the water storage space and an inflation port connected to the inflatable airbag. The water port is sealed and connected to the water storage bag.

2. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: The water tank shell comprises a columnar shell, and a first water tank plug and a second water tank plug are respectively provided at the front and rear ends of the columnar shell, and a through hole is provided at the center of the first water tank plug and the second water tank plug, and the hollow shaft rod passes through the two through holes in sequence from back to front and is sealed and fixed to the two through holes.

3. The inflatable dry hole acoustic wave test probe according to claim 2, characterized in that: The opposite ends of the first plug of the water reservoir and the second plug of the water reservoir are provided with inner extension rings concentric with the penetration hole, and the two ends of the inflatable airbag are respectively penetrated and sealed and fixed on the corresponding inner extension rings.

4. The inflatable dry hole acoustic wave test probe according to claim 3, characterized in that: The water inlet is arranged on the first plug of the water reservoir, the air filling port is arranged on the second plug of the water reservoir, and the air filling port is arranged on the part of the second plug of the water reservoir located in the inner extension ring thereof.

5. The inflatable dry hole acoustic wave test probe according to claim 4, characterized in that: A water inlet is provided at a position of the second plug of the water storage vessel corresponding to the water storage space. The water inlet is arranged concentrically with the water opening and is communicated with the water storage space.

6. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: A signal amplifier is arranged between the acoustic wave probe assembly and the water reservoir, and the signal amplifier includes a columnar amplifier housing and an amplifier element arranged in the amplifier housing. The two opposite ends of the acoustic wave probe assembly and the water reservoir are respectively detachably fixed to the two ends of the amplifier housing. The signal line includes a pickup signal line and an amplifier signal line. The pickup signal line connects the pickup assembly and the signal amplifier, and the amplifier signal line extends backward to connect to a receiving device.

7. The inflatable dry hole acoustic wave test probe according to claim 6, characterized in that: A connecting pipe is arranged at the front end of the water storage housing, a connector is arranged at the front end of the connecting pipe, and the connecting pipe is fixedly mounted on the amplifier housing through the connector.

8. The inflatable dry hole acoustic wave test probe according to claim 7, characterized in that: The second plug and the connector are respectively provided with a first connecting hole and a second connecting hole, the first connecting hole, the second connecting hole and the water outlet are concentric and in line, the first connecting hole is connected to the interior of the water storage bag, and the first connecting hole, the second connecting hole and the water outlet are connected through an inlet and outlet pipe.

9. The inflatable dry hole acoustic wave test probe according to claim 7, characterized in that: An air outlet hole penetrating along the front-to-back direction is provided in the middle of the first plug, a lifting eye screw is threadedly connected to the front end of the air outlet hole, and the lifting eye screw is sealed with the air outlet hole.

10. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: A guide is provided at the rear end of the water storage tank shell. The guide is a conical structure with a larger front and a smaller rear. The rear end of the guide is fixedly connected to the hollow shaft. A first guide port is opened on the middle circumference of the guide at a position corresponding to the inflation port. An air inlet and exhaust pipe is passed through the first guide port. The front end of the air inlet and exhaust pipe is connected to the inflation port.

11. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: The vibration pickup assembly includes a first vibration pickup, a second vibration pickup and a third vibration pickup arranged in sequence along the front-to-back direction, and a first porous connector and a second porous connector are detachably connected between the first vibration pickup and the second vibration pickup, and between the second vibration pickup and the third vibration pickup, respectively.

12. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: The first vibration pickup and the second vibration pickup as well as the second vibration pickup and the third vibration pickup are connected by high-strength fibers.

13. The inflatable dry hole acoustic wave test probe according to claim 1, characterized in that: The rear end of the hollow shaft extends out of the water storage housing and is provided with a wire groove, through which the signal line extends backwards, and a columnar nut is fixedly provided at the rear end of the hollow shaft, on which a push rod is threadedly connected.

14. The inflatable dry hole sonic wave test probe according to claim 1, characterized in that: The inner surface of the water storage bag is rough and the outer surface is smooth.

15. The inflatable dry hole sonic wave test probe according to claim 1, characterized in that: Both ends of the water storage bag are respectively provided with explosion-proof capsules.

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