Water storage device for inflatable dry hole sound wave test probe

Abstract

The invention relates to the technical field of geophysical prospecting professional in-hole sound wave testing equipment, in particular to a water storage device for an inflatable dry hole sound wave testing probe. The water storage device comprises a water storage device shell, the water storage device shell is used for being fixedly installed at the rear end of the sound wave testing probe, an inflation air bag is arranged in the water storage device shell, and a water storage space is formed between the inflation air bag and the water storage device shell. The water storage device shell is provided with an inflation inlet communicated with the inflation air bag in a sealed mode and a water passing opening communicated with the water storage space in a sealed mode, and the water passing opening is used for being communicated with a water storage bag of the sound wave testing probe in a sealed mode. The water storage space of the water storage device is communicated with the water storage bag, water stored in the water storage device can be squeezed into the water storage bag by inflating the inflatable air bag to achieve coupling of the vibration pickup and the hole wall, air in the inflatable air bag is discharged after testing is finished, the water flows back to the water storage space, and the device can be suitable for drilling testing work of different depths 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 a water storage container for 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 dry hole acoustic wave 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 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 methods sometimes cause the airbag to be squeezed due to excessive water injection, and sometimes cause poor coupling effect due to insufficient water injection. The overall operation is cumbersome and complex, 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 wave probe is only applicable to upper inclined holes. If the 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 wave probe unable to move and difficult to pull out from the hole. The gravity-type dry hole sonic wave probe is not applicable to lower inclined holes or plumb holes and has low practicality. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a water reservoir for an inflatable dry hole acoustic wave test probe. The water storage space and the water storage bag of the water reservoir are interconnected. The water stored in the water reservoir can be squeezed into the water storage bag by inflating the inflatable airbag to realize the coupling of 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. It can be suitable for drilling test work of different depths in all directions.

[0007] In response to the above technical problems, the technical solution provided by the present invention is a water reservoir for an inflatable dry hole sonic wave test probe, comprising a water reservoir shell, wherein the water reservoir shell is used to be fixedly installed on the rear end of the sonic wave test probe, an inflatable airbag is arranged in the water reservoir shell, and a water storage space is formed between the inflatable airbag and the water reservoir shell, and the water reservoir shell is provided with an inflation port sealedly connected to the inflatable airbag, and a water outlet sealedly connected to the water storage space, and the water outlet is used to be sealedly connected to the water storage bag of the sonic wave test probe.

[0008] Furthermore, a hollow shaft is passed through the interior of the water tank shell, and the hollow shaft is used for the signal line of the acoustic wave test probe to pass through. The two ends of the inflatable airbag are respectively sealed and fixed to the two ends of the water tank shell, and an enclosed inflatable space is formed between the inflatable airbag and the hollow shaft.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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, a connecting hole is opened at the position of the connector corresponding to the water outlet, and the connecting hole is connected to the water outlet through an inlet and outlet pipe.

[0014] 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.

[0015] Furthermore, the rear end of the hollow shaft extends out of the water storage housing and is provided with a wire groove, and a columnar nut is fixedly provided at the rear end of the hollow shaft, and a push rod is threadedly connected to the columnar nut.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The water reservoir is installed at the rear of the sonic test probe to form an inflatable dry hole sonic test probe. 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 test probe into the hole. When the sonic test probe reaches the specified position, it is inflated through the inflation port, the inflatable airbag expands, and the water in the water storage space is squeezed into the water storage bag through the water port, so that the water storage bag is fully in contact with the hole wall, and the vibration pickup is coupled with the hole wall through the water, so that the sonic test can be carried out. After the data collection is completed, the inflation port is deflated, and the inflatable airbag retracts, so that the water in the water storage bag flows back to the water storage space, the water storage bag retracts and separates from the hole wall, and the sonic probe can be moved to the next test point. The present invention can perform sonic testing at any angle of drilling, 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.

[0018] The water storage container with a rigid shell is arranged at the rear of the sonic wave test probe, which can facilitate the sonic wave test probe to be placed in the upper inclined hole. The two can be detachably connected and are easy to carry and transport.

[0019] (2) 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.

[0020] (3) A conical guide facilitates the removal of the water reservoir of the inflatable dry hole sonic test probe from the test borehole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure and appearance of the water storage device in Example 1 of the present invention.

[0022] Figure 2 It is a cross-sectional view of the water storage container in Example 1 of the present invention.

[0023] Figure 3 It is a first direction axial view of the first plug of the water storage tank in Example 1 of the present invention.

[0024] Figure 4 It is a second direction axonometric view of the first plug of the water storage tank in Example 1 of the present invention.

[0025] Figure 5 It is a first direction axonometric view of the second plug of the water storage tank in Example 1 of the present invention.

[0026] Figure 6 It is a second direction axonometric view of the second plug of the water storage tank in Example 1 of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure and appearance of the guide in Example 1 of the present invention.

[0028] Figure 8 It is a schematic diagram of the overall structural appearance of the acoustic wave test probe in Example 1 of the present invention.

[0029] Fig. 9 It is a cross-sectional view of the acoustic wave test probe in Example 1 of the present invention.

[0030] Fig.10 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.

[0031] Fig.11 It is a schematic diagram of the structure and appearance of the signal amplifier in Example 1 of the present invention.

[0032] Fig.12 It is a diagram showing the composition of the amplifier element in Embodiment 1 of the present invention.

[0033] Fig.13 It is a composition diagram of the filter in Example 1 of the present invention.

[0034] Fig.14 It is a cross-sectional view of the first plug in Example 1 of the present invention.

[0035] Fig.15 It is a schematic diagram of the structural appearance of the second plug in Example 1 of the present invention.

[0036] Fig.16 It is a schematic structural appearance diagram of the connector in Example 1 of the present invention.

[0037] Fig.17It is a schematic diagram of the structure of the inflatable dry hole acoustic wave test probe in Example 1 of the present invention.

[0038] Fig.18 It is a cross-sectional view of the inflatable dry hole acoustic wave test probe in Example 1 of the present invention.

[0039] Fig.19 It is a schematic diagram of the structure and appearance of the first vibration pickup in Example 1 of the present invention.

[0040] Fig. 20 It is a schematic diagram of the structural appearance of the second porous connector in Example 1 of the present invention.

[0041] In the figure: 1, acoustic wave test probe; 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, water hole; 13, water storage bag; 15, signal line; 151, vibration pickup signal line; 152, amplifier signal line; 153, extension section;

[0042] 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; 252. air filling space; 26. first capillary steel tube; 27. second capillary steel tube; 28. third capillary steel tube; 29. ​​air-filled airbag; 210. water storage space;

[0043] 3. Connecting pipe; 4. Connector; 41. Connecting hole; 5. Inlet and outlet pipe; 6. Water inlet pipe; 7. Inlet and outlet pipe;

[0044] 8. Guide; 81. First guide hole; 82. Second guide hole; 9. Columnar nut; 10. Signal amplifier; 101. Amplifier housing; 1011. Mounting hole; 1012. Screw hole; 1013. Conical tail;

[0045] 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

[0046] 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:

[0048] refer to Figures 1 to 20 The water storage device for an inflatable dry hole acoustic wave test probe (hereinafter referred to as the water storage device) of the present invention is applied to Figure 8 , 9 The acoustic wave test probe 1 shown in the figure is assembled into Fig.17 , 18 The air-filled dry hole sonic test probe shown.

[0049] Specifically, in this embodiment, if Figure 8 , 9 As shown in Figure 10, the acoustic wave test probe 1 includes a vibration pickup assembly 11, a first plug 121 and a second plug 122 respectively arranged at the two 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 sealed and fixed to the first plug 121 and the second plug 122 respectively, and explosion-proof capsules 125 are sleeved on the outside 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 first 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. 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 water, and then the acoustic wave test can be performed on the point.

[0050] 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.

[0051] Specifically, in this embodiment, if Fig. 9 , 10 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.

[0052] Adjacent vibration pickups are connected by porous connectors, and the porous connectors include 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 detachably connected between the second vibration pickup 112 and the third vibration pickup 113. Fig. 20 As shown, the first porous connector 114 is similar to the second porous connector 115, both of which are cylindrical thin-walled cavity tube structures with multiple gaps on their side walls. The gaps can prevent the second vibrator 112 and the third vibrator 113 from receiving interference signals that propagate directly along the porous connector, thereby improving the signal-to-noise ratio.

[0053] In this embodiment, if Fig.10 , 19 As shown, an extension section 153 is respectively provided at the front and rear ends of the vibration pickup, and the front and rear ends of the porous connector are respectively inserted into the corresponding extension section 153 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 in turn causes the distance between adjacent vibration pickups to become longer, resulting in 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.

[0054] In this embodiment, if Fig. 9 , 10 As shown in Figures 14 and 15, the rear portion of the first plug 121 is provided with a notch adapted to the extension section 153 of the first vibration pickup 111, and the notch is sleeved on the extension section 153 at the front end of the first vibration pickup 111 and fixedly connected by screws. An air outlet 1211 is provided in the middle portion of the first plug 121, which passes through in the front-to-back direction. The air outlet 1211 is connected to the water storage bag 13, and 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, firstly arrange the front end of the acoustic wave test probe 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.

[0055] In this embodiment, if Fig. 9 , 14As shown, 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 diameter of the small diameter section is flush with the outer diameter of the vibration pickup assembly 11, and the extension section 153 at the front end of the first vibration pickup 111 is inserted into the inner ring of the small diameter section and fixedly connected with screws.

[0056] 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.

[0057] In this embodiment, if Figure 1 , 2 As shown, the water reservoir 2 includes a water reservoir shell 21, which is used to be fixedly installed on the rear end of the ultrasonic test probe 1. An inflatable airbag 29 is arranged in the water reservoir shell 21, and a water storage space 210 is formed between the inflatable airbag 29 and the water reservoir shell 21. The water reservoir shell 21 is provided with an inflation port 23 which is sealed and connected to the inflatable airbag 29, and a water port 22 which is sealed and connected to the water storage space 210. The water port 22 is used to be sealed and connected to the water storage bag 13 of the ultrasonic test probe 1.

[0058] The rear part of the acoustic wave test probe 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 acoustic wave test probe 1 goes deep into the hole. When the acoustic wave test probe 1 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, 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 sonic wave test probe 1 can perform sonic wave testing on boreholes at any angle, and does not require the installation of an additional water pump or water source. It only needs to be inflated and deflated, which is convenient and fast, easy to test, and improves practicality.

[0059] At the same time, in this embodiment, a water tank 2 with a rigid shell is arranged at the rear of the acoustic wave test probe 1, which can facilitate the placement of the acoustic wave test probe 1 into the upper inclined hole. The acoustic wave test probe 1 and the water tank 2 are detachably connected to facilitate carrying and transportation.

[0060] Preferably, in this embodiment, a hollow shaft is also provided inside the water tank shell, and the hollow shaft is used for passing the signal line of the acoustic wave test probe. The two ends of the inflatable airbag are respectively sealed and fixed to the two ends of the water tank shell, and an enclosed inflatable space is formed between the inflatable airbag and the hollow shaft.

[0061] Specifically, in this embodiment, if Fig.17 , 18 As shown, a signal amplifier 10 is arranged between the acoustic wave test probe 1 and the water reservoir 2. The signal amplifier 10 includes a columnar amplifier housing 101 and an amplifier element 102 arranged in the amplifier housing 101. The acoustic wave test probe 1 and the water reservoir 2 are respectively fixed at two ends of the amplifier housing 101, and a detachable connection between the acoustic wave test probe 1 and the water reservoir 2 is achieved through the signal amplifier 10.

[0062] In this embodiment, the signal line 15 of the acoustic wave test probe 1 includes a pickup signal line 151 and an amplifier signal line 152, wherein the pickup signal line 151 connects the output end of the pickup assembly 11 and the input end of the amplifier element 102, and the amplifier signal line 152 connects the output end of the amplifier element 102 and extends backward through the hollow shaft 25 to connect to an external receiving device.

[0063] Specifically, in this embodiment, if Fig.11 As shown, the front end of the amplifier housing 101 is provided with a mounting hole 1011 adapted to the extension section 153 of the third vibration pickup 113, the outer diameter of the amplifier housing 101 is adapted to the outer diameter of the vibration pickup assembly 11, and the position of the amplifier housing 101 corresponding to the mounting hole 1011 is provided with a screw hole 1012, the rear end of the third vibration pickup 113 is inserted deep into and fixedly connected to the front end of the amplifier housing 101 by screws screwed in the screw hole 1012, and the vibration pickup signal line 151 is inserted into the amplifier housing 101 through the mounting hole 1011 and connected to the amplifier element 102 inside it. In this way, the vibration pickup assembly 11 and the signal amplifier 10 are fixedly arranged in sequence along the front-to-back direction.

[0064] In this embodiment, if Figure 8 , 9As shown in Figures 11, the inner diameter of the second plug 122 is matched with the outer diameter of the amplifier housing 101, and the outer diameter of the second plug 122 is matched with the middle diameter section of the first plug 121. Screw holes 1012 are provided on the circumference of the amplifier housing 101 at positions corresponding to the second plug 122. The second plug 122 is mounted on and removably fixed to the front of the amplifier housing 101 by screws screwed into the corresponding screw holes 1012, and is sealed with the amplifier housing 101.

[0065] In this embodiment, a water hole 126 communicating with the water storage bag 13 is opened on the end surface of the second plug 102 along its axial direction, and water is injected into the water storage bag 13 through the water hole 126 to perform a coupling test.

[0066] like Figure 8 , 15 As shown, in this embodiment, a protective ring 123 is fixedly provided on the outer periphery of the rear portion of the second plug 122, and the outer diameter of the protective ring 123 is adapted to the large diameter section of the first plug 121 to form a variable diameter structure. A cylindrical connector 4 is fixedly provided on the rear portion of the amplifier housing 101, and the inner diameter of the connector 4 is adapted to the outer diameter of the amplifier housing 101, and the outer diameter of the connector 4 is adapted to the outer diameter of the protective ring 123. A connecting hole 41 is provided at a position of the connector 4 corresponding to the water hole 126, and the connecting hole 41 is arranged concentrically with the water hole 126. An inlet and outlet pipe 5 is connected between the connecting hole 41 and the water hole 126, and the rear end of the inlet and outlet pipe 5 is used to connect to the water port of the water storage tank 2.

[0067] The protective ring 123 is sleeved on the rear of the second plug 122 to protect the signal amplifier 10 to a certain extent, preventing the signal amplifier 10 from being damaged by collision or friction during operation in the borehole. The water hole 126 and the connecting hole 41 are connected to the water inlet and outlet pipe 5, ensuring the water communication between the water storage bag 13 and the water storage tank 2, so that the water filling and drainage operations can be carried out smoothly, which is conducive to controlling the water volume and pressure in the water storage bag 13, thereby achieving good coupling between the acoustic wave probe and the hole wall, and improving the operability and functionality of the probe.

[0068] In this embodiment, the rear end of the water storage bag 13 is sleeved on the second plug 122 and sealed and fixed by the 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.

[0069] In this 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.

[0070] 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.

[0071] In this embodiment, if Fig.12 , 13 As shown, the amplifier element 102 includes a preamplifier 1021, a filter 1022 and a differential amplifier 1023 connected in series, wherein the preamplifier 1021, the filter 1022 and the differential amplifier 1023 sequentially amplify, filter and convert the signal of the vibration pickup assembly 11 into a differential signal. It can effectively enhance the signal strength, remove noise and convert the signal into a balanced differential signal with strong anti-interference ability, improve the reliability and accuracy of the entire acoustic wave test probe in complex environments, ensure that the received signal is not distorted during long-distance transmission, improve the quality and recognizability of the signal, thereby more accurately obtaining the acoustic wave information in the hole, ensuring the accuracy and reliability of the survey data, facilitating the accurate analysis of geological structure and other information in engineering geological survey work, and more suitable for large-scale field and deep well testing and other scenes with high signal quality requirements.

[0072] Specifically, in this embodiment, the amplifier signal line 152 is a twisted pair, which can effectively suppress common mode noise and reduce signal interference during transmission by utilizing the characteristics of the twisted pair, further ensuring the stability and accuracy of signal transmission, so that the amplified and processed signal can be more reliably transmitted to the receiving device, and even in the case of long-distance transmission or external electromagnetic interference, the risk of signal distortion can be reduced, and the received weak signal can be transmitted over a longer distance, thereby ensuring the quality of deep hole detection and improving the credibility of the test results.

[0073] Preferably, in this embodiment, a matching circuit 1024 is further provided at the output end of the differential amplifier 1023, and the matching circuit 1024 receives the balanced differential signal of the differential amplifier and adjusts the output impedance of the signal so that the output impedance matches the characteristic impedance of the twisted pair. This design can minimize the reflection phenomenon of the signal during transmission, avoid the change of signal amplitude and phase caused by impedance mismatch, thereby ensuring that the signal is transmitted in the twisted pair with minimum loss and distortion, ensuring the quality of long-distance signal transmission, enabling the acoustic wave test probe to adapt to the test requirements of deeper drilling, and improving the applicability and versatility of the probe in different engineering environments.

[0074] 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.

[0075] In this embodiment, the filter 1022 includes a high-pass filter 1025, a band-pass filter 1026 and a low-pass filter 1027. The high-pass filter 1025 can filter out low-frequency interference, the band-pass filter 1026 can accurately filter out a specific frequency band related to the sound wave signal, and the low-pass filter 1027 removes high-frequency noise, thereby effectively purifying the signal collected by the vibration pickup assembly 11, improving the signal-to-noise ratio of the signal, providing a better signal source for subsequent signal amplification and analysis, helping to more accurately obtain the sound wave information in the borehole, and improving the accuracy of engineering geological surveys.

[0076] Specifically, in the present embodiment, the input and output of the high-pass filter 1025, the band-pass filter 1026 and the low-pass filter 1027 are sequentially connected in series, and the input of the high-pass filter 1025 is connected to the output of the preamplifier 1021, and the output of the low-pass filter 1027 is connected to the input of the differential amplifier 1023. The amplified signal input from the preamplifier 1021 first enters the high-pass filter 1025 to filter out low-frequency interference, and then further screens out the target sound wave frequency band through the band-pass filter 1026, and finally removes the residual high-frequency noise with the low-pass filter 1027, forming a complete and orderly signal filtering chain. The signal quality is maximized and fine filtering is achieved. The performance and stability of the entire signal processing system are improved. Of course, in other embodiments, according to actual use requirements, the filter 1022 in which the high-pass filter 1025, the band-pass filter 1026 and the low-pass filter 1027 are connected in parallel can also be selected.

[0077] In this embodiment, if Fig. 9 As shown, the outer diameter of the large diameter section of the first plug 121 is adapted to be flush with the outer diameter of the explosion-proof capsule 125, a tapered front end is provided at the front of the large diameter section, and a tapered tail 1013 is provided at the rear end of the amplifier housing 101 to facilitate entry and exit of the test borehole.

[0078] In this embodiment, if Figure 1 , 2 As 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.

[0079] Preferably, in this embodiment, Figure 3 , 4As shown in Figures 5 and 6, 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, so as to form an inflatable space 252 between the inner extension ring 215 and the hollow shaft 25 by utilizing the wall thickness of the inner extension ring 215. Among them, the water inlet 22 is provided on the end face 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.

[0080] 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 air filling space 252, and the air filling port 23 is connected to the inside of the air bag 29.

[0081] 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.

[0082] In this embodiment, if Figure 1 As shown, 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 through the connector 4 .

[0083] 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.

[0084] 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 integrally 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 and installed in the screw hole 1012 at the rear of the amplifier housing 101 by means of fixing screws passing through the fastening holes to achieve fixation.

[0085] The rear end of the inlet and outlet pipe 5 is sealed and connected to the front end of the first capillary steel tube 26 of the water port 22, and the front end of the inlet and outlet pipe 5 passes through the connecting hole 41 and is connected to the water hole 126 of the second plug 122. Specifically, a 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 hose, and the hose is connected to the inlet and outlet hose through a quick connection. The water hole 126, the connecting hole 41 and the water port 22 are connected through the inlet and outlet pipe 5, so that the water storage space 210 is connected to 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 inlet and outlet pipe 5.

[0086] In this embodiment, if Figure 5 , 6 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, Fig.12 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.

[0087] In this embodiment, the rear end of the hollow shaft 25 extends out of the water storage housing 21 and is provided with a wire groove 251. The signal line 15 extends backward through the wire groove 251. A cylindrical nut 9 is fixedly provided at the rear end of the hollow shaft 25. A push rod is threadedly connected to the cylindrical nut 9. The push rod is used to drive the test probe to move in the hole.

[0088] Preferably, in this embodiment, Figure 1 , 7 As 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 81 and a second guide hole 82 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.

[0089] How to use this application:

[0090] Step 1: Connect the signal line 15 to the external instrument.

[0091] 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.

[0092] Step 3: Insert the rear end of the connector 4 into the front end of the connecting pipe 3 and fasten it with a fixing screw, assembling the acoustic wave test probe 1 and the water reservoir 2 to form an inflatable dry hole acoustic wave test probe.

[0093] Step 4: Before placing the inflatable dry hole sonic wave test probe, make the front end of the sonic wave test probe 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 has been completely discharged. At this time, the water injection is stopped, 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.

[0094] 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.

[0095] Step 6: Send the inflatable dry hole sonic test probe to the test location.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] Step 10: Remove the screws connecting the water reservoir 2 and the ultrasonic test probe 1, separate the water reservoir 2 and the ultrasonic test probe, and wind up the line to finish the work.

[0100] In summary, by installing a water reservoir 2 at the rear end of the sonic wave test probe 1, the overall inflatable dry hole sonic wave test probe can be used for sonic wave testing of boreholes without water in all directions. No water source is required on site, only an air pump is needed, and the scope of application is wide. The water reservoir 2 and the sonic wave test probe 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.

[0101] 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.

[0102] 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.

[0103] 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. A water reservoir for an inflatable dry hole sonic test probe, characterized in that: It includes a water reservoir shell, which is used to be fixedly installed on the rear end of the ultrasonic test probe. An inflatable airbag is arranged in the water reservoir shell, and a water storage space is formed between the inflatable airbag and the water reservoir shell. The water reservoir shell is provided with an inflation port which is sealed and connected to the inflatable airbag, and a water port which is sealed and connected to the water storage space. The water port is used to be sealed and connected to the water storage bag of the ultrasonic test probe.

2. The water storage container for the inflatable dry hole sonic wave test probe according to claim 1, characterized in that: A hollow shaft is passed through the interior of the water tank shell, and the hollow shaft is used for the signal line of the acoustic wave test probe to pass through. The two ends of the inflatable airbag are respectively sealed and fixed to the two ends of the water tank shell, and a closed inflatable space is formed between the inflatable airbag and the hollow shaft.

3. The water storage container for the inflatable dry hole sonic wave test probe according to claim 2, 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.

4. The water storage container for the inflatable dry hole sonic wave test probe according to claim 3, 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.

5. The water storage container for the inflatable dry hole sonic wave test probe according to claim 4, 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.

6. The water storage container for the inflatable dry hole sonic wave testing probe according to claim 5, 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.

7. The water storage container for the inflatable dry hole sonic wave test probe according to claim 1, characterized in that: 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, a connecting hole is opened at the position of the connector corresponding to the water outlet, and the connecting hole is connected with the water outlet through an inlet and outlet pipe.

8. The water storage container for the inflatable dry hole sonic wave testing probe according to claim 2, 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.

9. The water storage container for the inflatable dry hole sonic wave testing probe according to claim 2, characterized in that: The rear end of the hollow shaft extends out of the water storage housing and is provided with a wire groove. The rear end of the hollow shaft is fixedly provided with a columnar nut, and a push rod is threadedly connected to the columnar nut.

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