A wellhead acoustic emission sensor fixing device

Abstract

The present invention relates to the technical field of testing or analyzing materials by measuring the chemical or physical properties of the materials, and specifically to a wellhead acoustic emission sensor fixing device, comprising a base and a sensor sleeve arranged on the base, an acoustic emission sensor is installed in the sensor sleeve, an elastic structure is arranged on the sensor sleeve, and an adsorption component and a fixing mechanism are arranged on the base. The elastic structure can make the acoustic emission sensor fit closely with the object to be measured, absorb external vibration and impact, so as to protect the acoustic emission sensor; the adsorption component can make the base quickly and conveniently installed on the surface of the object to be measured with ferromagnetism, so as to pre-fix the device; when fixing the base, it is only necessary to clamp the claw into the wellhead position, and then rotate the rotating sleeve to realize the clamping and locking action of the claw, which is simple to operate, has low requirements for operators, and is also relatively simple to disassemble, so that the efficiency of installation and disassembly is improved.

Description

Technical Field

[0001] The invention relates to the technical field of testing or analyzing materials by means of determining the chemical or physical properties of the materials, in particular to a wellhead acoustic emission sensor fixing device. Background Art

[0002] Wellhead devices, as key core components in the oil and gas extraction process, are of indispensable importance to the production efficiency and safety of oil (gas) wells. During the manufacturing stage, these devices may have hidden initial minor defects. After being put into use, facing the harsh environmental challenges of temperature changes, erosion corrosion, pressure fluctuations, frequent starts and stops, and long-term outdoor operations, cracks, grooves, pits and other damages often gradually develop inside. If these potential problems are not identified and handled in time, the spread of cracks will weaken the wall thickness and structural strength of the equipment cavity over time, and may eventually cause accidental injection or leakage of high-temperature and high-pressure oil and gas, resulting in catastrophic consequences such as environmental pollution, poisoning crises, and even fire and explosion, posing a serious threat to the economy and personnel safety.

[0003] When cracks appear inside or on the surface of the wellhead device, high-frequency acoustic emission signals are released. With the help of acoustic emission sensors for continuous online monitoring, we can quickly capture these signals, thereby achieving early detection of cracks and effective risk control. The core of acoustic emission detection technology is to capture crack signals through direct contact between the sensor and the surface of the object being tested. Therefore, it is particularly important to select and apply a suitable acoustic emission sensor fixture.

[0004] However, existing sensor fixtures are unable to cope with the special needs of wellhead work, especially the lack of adaptability to corrosion, explosion and high vibration, and difficulty in adapting to the complex and changeable surface structure of the wellhead device to achieve a tight fit. An ideal fixture should first ensure a stable connection between the sensor and the measuring surface to provide a stable and reliable signal transmission path to avoid signal interference or attenuation caused by position offset, thereby improving the accuracy and stability of detection. Secondly, in view of the high risk of the wellhead operation area - a flammable and explosive environment, the fixture must have an explosion-proof design to prevent explosions caused by external fire sources or mechanical friction, protect the safety of operations, and meet the industry's strict safety standards. Furthermore, for the high humidity and highly corrosive gas environment in which the wellhead device is located, an effective anti-corrosion design will significantly extend the service life of the fixture and sensor, ensuring the continuous and stable progress of the detection work. Summary of the invention

[0005] The object of the present invention is to provide a wellhead acoustic emission sensor fixing device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wellhead acoustic emission sensor fixing device comprises a base and a sensor sleeve arranged on the base, the sensor sleeve is provided with a U-shaped door hole, and the acoustic emission sensor is installed in the sensor sleeve;

[0008] The sensor sleeve is provided with an elastic structure, the elastic structure is connected to the acoustic emission sensor, the elastic structure can make the acoustic emission sensor fit closely with the object to be measured, and the elastic structure can change the pressure on the acoustic emission sensor;

[0009] The base is symmetrically provided with fixing mechanisms on both sides, and the fixing mechanisms include two symmetrically provided claws and a telescopic connection piece connecting the claws, and the telescopic connection piece is used to rotate the two claws toward each other, squeeze and lock them when the claws are clamped on the wellhead.

[0010] As a further solution of the present invention: the elastic structure includes a screw rod, a movable disc and a spring No. 1, a through hole is opened on the top of the sensor sleeve, and one end of the screw rod passes through the through hole and extends to the interior of the sensor sleeve;

[0011] The movable disc is threadedly connected to the screw rod, a threaded hole is provided on the top of the acoustic emission sensor, one end of the screw rod extends into the threaded hole and meshes with each other;

[0012] The No. 1 spring is sleeved on the outside of the screw rod, and two ends of the No. 1 spring are respectively against the inner top of the sensor sleeve and the top of the moving disc.

[0013] As a further solution of the present invention: an adsorption component is also arranged on the base, and the adsorption component includes a fixed magnet and a screw. A receiving groove is opened at the bottom of the base, and the fixed magnet is fixedly installed in the receiving groove by the screw.

[0014] As a further solution of the present invention: the base is provided with four grooves, which are respectively located at the four corners of the top of the base, and the cable ties are passed around the grooves to fix the base.

[0015] As a further solution of the present invention: the fixing mechanism further comprises a mounting frame and a fixing frame fixed to each other, and the mounting frame is fixedly connected to the base;

[0016] The two claws are rotatably mounted on the mounting frame via two rotating shafts, and the two rotating shafts are rotatably connected via a gear set;

[0017] Two ends of the telescopic connecting member are respectively hinged to the fixing frame and one of the clamping claws.

[0018] As a further solution of the present invention: the telescopic connector comprises:

[0019] A sleeve hinged on the fixing frame and a connecting rod hinged on the claw, wherein one end of the connecting rod facing the sleeve is inserted into the sleeve and can slide along the axial direction of the sleeve;

[0020] A movable rod movably arranged in the sleeve, one end of the movable rod is rotatably connected to the connecting rod through a rotating disk, and the other end of the movable rod is rotatably mounted with another rotating disk, and the other rotating disk is connected to a first spring installed in the sleeve;

[0021] It also includes a pressing and locking unit, which is used to press the movable rod to rotate and lock the position of the movable rod.

[0022] As a further solution of the present invention: the extrusion locking unit includes:

[0023] An embedded strip groove formed on the inner wall of the sleeve and parallel to the axial direction of the sleeve;

[0024] A plurality of inclined guide grooves are formed on the inner wall of the sleeve and are arranged equidistantly along the length direction of the embedded strip groove, and the clamping column fixed on the movable rod is adapted to the inclined guide grooves;

[0025] A rotating sleeve rotatably mounted on the outside of the sleeve, the rotating sleeve being fixed to an extrusion plate slidably arranged in the embedded strip groove, and the rotating sleeve being able to squeeze the clamping column located in the embedded strip groove toward the inclined guide groove when rotating;

[0026] A locking member is mounted on the sleeve and is used to perform one-way locking on the rotating sleeve.

[0027] As a further solution of the present invention: the ratio of the width of the embedded strip groove to the width of the extruded plate is 2:1.

[0028] As a further solution of the present invention: the locking member includes:

[0029] A plurality of second latch teeth formed on the rotating sleeve;

[0030] A chuck is sleeved on the sleeve and slides axially along the sleeve, wherein a first locking tooth engaging with the second locking tooth is formed on a side of the chuck facing the rotating sleeve, and a second spring is arranged on a side of the chuck away from the first locking tooth.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 304 stainless steel is used as the material of the sensor fixing device. 304 stainless steel has excellent corrosion resistance and can extend the service life of the device. The elastic structure can make the acoustic emission sensor fit closely with the object to be measured, absorb external vibration and impact, and protect the acoustic emission sensor. The adsorption component can make the base quickly and conveniently installed on the surface of the object to be measured with ferromagnetism to pre-fix the device.

[0033] When fixing the base, it is only necessary to insert the claw into the wellhead position, and then rotate the rotating sleeve to achieve the clamping and locking action of the claw. The operation is simple and the requirements for the operator are low. At the same time, the disassembly is also relatively simple, which improves the efficiency of installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a schematic diagram of the overall structure of an embodiment of a wellhead acoustic emission sensor fixing device.

[0035] Figure 2 This is a schematic diagram from another perspective of the overall structure of an embodiment of a wellhead acoustic emission sensor fixing device.

[0036] Figure 3 This is a cross-sectional view of a base, a sensor sleeve, an acoustic emission sensor, a moving disc, and a No. 1 spring in one embodiment of a wellhead acoustic emission sensor fixing device.

[0037] Figure 4 This is a disassembled diagram of a moving disc, a screw rod, a No. 1 spring, and an acoustic emission sensor in one embodiment of a wellhead acoustic emission sensor fixing device.

[0038] Figure 5 This is a disassembled diagram of the fixing magnets and screws in one embodiment of a wellhead acoustic emission sensor fixing device.

[0039] Figure 6 The figure is a schematic diagram of the overall structure of another embodiment of a wellhead acoustic emission sensor fixing device.

[0040] Figure 7 This is a schematic diagram of the structure of the fixing mechanism in another embodiment of the wellhead acoustic emission sensor fixing device.

[0041] Figure 8 This is a structural exploded view of a telescopic connector in another embodiment of a wellhead acoustic emission sensor fixing device.

[0042] Fig. 9 This is a structural explosion diagram from another angle of the telescopic connector in another embodiment of the wellhead acoustic emission sensor fixing device.

[0043] Fig.10It is a cross-sectional view of the connection state of the sleeve and the rotating sleeve in another embodiment of the wellhead acoustic emission sensor fixing device.

[0044] Fig.11 It is a cross-sectional view of the separation state of the sleeve and the rotating sleeve in another embodiment of the wellhead acoustic emission sensor fixing device.

[0045] In the figure: 1-base; 101-accommodating groove; 2-sensor sleeve; 201-through hole; 3-U-shaped door opening; 4-acoustic emission sensor; 401-threaded hole; 5-screw; 6-movable disc; 7-No. 1 spring; 8-fixed magnet; 9-screw; 10-groove; 11-mounting frame; 12-fixed frame; 13-telescopic connecting piece; 1301-sleeve; 13011-strip through groove; 13012-embedded strip groove; 13013-inclined guide groove; 13021-second clamping tooth; 13022-extrusion plate; 1302-rotating sleeve; 1303-connecting rod; 1304-movable rod; 13041-clamping column; 1305-rotating disc; 1306-first spring; 1307-second spring; 1308-chuck; 13081-first clamping tooth; 14-claw; 15-gear set. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0048] See also Figures 1 to 11 In an embodiment of the present invention, a wellhead acoustic emission sensor fixing device includes a base 1 and a sensor sleeve 2 arranged on the base 1, a U-shaped door opening 3 is arranged on the sensor sleeve 2, and an acoustic emission sensor 4 is installed in the sensor sleeve 2.

[0049] An elastic structure is provided on the sensor sleeve 2 , and the elastic structure is connected to the acoustic emission sensor 4 . The elastic structure can make the acoustic emission sensor 4 fit closely to the object to be measured, and the elastic structure can be adjusted to change the pressure on the acoustic emission sensor 4 .

[0050] The base 1 is symmetrically provided with fixing mechanisms on both sides, and the fixing mechanisms include two symmetrically provided claws 14 and a telescopic connector 13 connecting the claws 14 . The telescopic connector 13 is used to rotate the two claws 14 toward each other, squeeze them and lock them when the claws 14 are clamped on the wellhead.

[0051] In this solution, 304 stainless steel is used as the material of the sensor fixing device. 304 stainless steel has excellent corrosion resistance and can extend the service life of the device. 304 stainless steel also gives the sensor fixing device excellent explosion-proof performance, which can effectively prevent the occurrence of flammable and explosive accidents. The elastic structure set up can make the acoustic emission sensor 4 fit closely with the object to be measured, absorb external vibration and impact, and protect the acoustic emission sensor 4. The adsorption component can enable the base 1 to be quickly and conveniently installed on the surface of the object to be measured with ferromagnetism to pre-fix the device.

[0052] The elastic structure can be adjusted to change the pressure on the acoustic emission sensor 4, thereby improving the practicability of the device.

[0053] Specifically, the base 1 serves as the foundation of the entire device, providing a stable support and installation platform. The design of the base 1 should ensure the stability of the overall structure and adapt to different installation environments. The sensor sleeve 2 is mainly used to accommodate and protect the acoustic emission sensor 4. The function of the U-shaped door opening 3 is to provide an entrance and exit for the acoustic emission sensor 4 or the cable, which is convenient for installation and maintenance, and at the same time, protects the cable interface of the acoustic emission sensor 4. The U-shaped door opening 3 is located on the surface of the sensor sleeve 2 and the base 1, allowing the connecting cable of the acoustic emission sensor 4 to pass smoothly, which can reduce obstacles during the installation process. At the same time, the U-shaped design facilitates the rapid installation and removal of the acoustic emission sensor 4, thereby improving work efficiency. The acoustic emission sensor 4 is installed in the sensor sleeve 2, and appropriate pressure is applied by the elastic structure to ensure close contact with the surface of the object to be measured. The acoustic emission sensor 4 is stably fixed on the surface of the wellhead device and accurately captures the required acoustic emission signal.

[0054] See also Figure 3 , Figure 4 The elastic structure includes a screw rod 5 , a movable disc 6 and a No. 1 spring 7 . A through hole 201 is provided on the top of the sensor sleeve 2 . One end of the screw rod 5 passes through the through hole 201 and extends to the interior of the sensor sleeve 2 .

[0055] The movable disc 6 is threadedly connected to the screw rod 5 . A threaded hole 401 is provided on the top of the acoustic emission sensor 4 . One end of the screw rod 5 extends into the threaded hole 401 and meshes with each other.

[0056] The No. 1 spring 7 is sleeved on the outside of the screw rod 5 , and two ends of the No. 1 spring 7 are respectively against the inner top of the sensor sleeve 2 and the top of the moving disc 6 .

[0057] In this embodiment, due to the presence of spring No. 1 7 and the maintained compressed state, in the absence of external force, spring No. 1 7 will make the acoustic emission sensor 4 always have a tendency to be close to the object to be measured through the moving disk 6 and the screw 5. Therefore, when the object to be measured vibrates, the elastic deformation of spring No. 1 7 can be used to absorb the vibration to protect the acoustic emission sensor 4. In the above-mentioned vibration state, the screw 5 will slide with the sensor sleeve 2 through the through hole 201.

[0058] When the pressure on the acoustic emission sensor 4 needs to be adjusted, the movable disc 6 is driven to rotate on the screw 5 by external force. When the position of the movable disc 6 on the screw 5 changes, the deformation of the No. 1 spring 7 will also change accordingly, thereby changing the pressure on the acoustic emission sensor 4.

[0059] By installing the moving disk 6, the direct contact between the No. 1 spring 7 and the acoustic emission sensor 4 is effectively prevented, thereby avoiding damage to the contact surface of the acoustic emission sensor 4 caused by friction. In addition, the moving disk 6 also isolates the No. 1 spring 7 from the environment, playing a protective role in preventing the No. 1 spring 7 from corrosion.

[0060] See also Figure 5 The adsorption component includes a fixed magnet 8 and a screw 9. A receiving groove 101 is provided at the bottom of the base 1. The fixed magnet 8 is fixedly installed in the receiving groove 101 by the screw 9.

[0061] In this embodiment, the function of the fixed magnet 8 is to provide magnetic fixation so that the device can be quickly and conveniently installed on the surface of the object to be measured with ferromagnetism without the need for additional mechanical fixation. The fixed magnet 8 is installed under the base 1, and the entire device is firmly adsorbed on the object to be measured through magnetic force, providing a stable installation method, which is particularly suitable for temporary monitoring scenarios.

[0062] Function of screw 9: used to fix and adjust the position and tightness of fixed magnet 8. Screw 9 is used to connect fixed magnet 8 and base 1 to ensure tight connection and stability between the components.

[0063] Among them, the reasonable design of the fixed magnet 8 on the base 1 adopts four annular magnets. Such a design helps to increase the magnetism while reducing the area of ​​the base 1. This is because the annular magnet has a larger magnetic field concentration and can produce a stronger adsorption force in a smaller volume. By distributing four annular magnets at the four corners of the base 1, the device can maintain or even enhance its adsorption ability on the metal surface while reducing the material and size of the base 1. This design not only optimizes the space utilization, but also improves the stability of the device, ensuring the stability and reliability of the sensor in harsh environments.

[0064] Furthermore, in one embodiment, the base 1 is provided with four grooves 10 , which are respectively located at the four corners of the top of the base 1 , and the base 1 is fixed by wrapping cable ties around the grooves 10 .

[0065] See also Figure 6-Figure 11 The fixing mechanism also includes a mounting frame 11 and a fixing frame 12 fixed to each other, and the mounting frame 11 is fixedly connected to the base 1.

[0066] The two claws 14 are rotatably mounted on the mounting frame 11 via two rotating shafts, and the two rotating shafts are rotatably connected via a gear set 15 .

[0067] The two ends of the telescopic connector 13 are respectively hinged to the fixing frame 12 and one of the claws 14 .

[0068] The fixing frame 12 is vertically arranged to the mounting frame 11 , and the fixing frame 12 protrudes from the upper surface of the base 1 .

[0069] Specifically, the telescopic connector 13 includes:

[0070] The sleeve 1301 is hinged on the fixing frame 12 and the connecting rod 1303 is hinged on the claw 14 . One end of the connecting rod 1303 facing the sleeve 1301 is inserted into the sleeve 1301 and can slide along the axial direction of the sleeve 1301 .

[0071] A movable rod 1304 is movably arranged in the sleeve 1301 , one end of the movable rod 1304 is rotatably connected to the connecting rod 1303 through a rotating disk 1305 , and the other end is rotatably installed with another rotating disk 1305 , and the other rotating disk 1305 is connected to a first spring 1306 installed in the sleeve 1301 .

[0072] It also includes a pressing and locking unit, which is used to press the movable rod 1304 to rotate and lock the position of the movable rod 1304.

[0073] In this embodiment, the two claws 14 are unfolded, and the connecting rod 1303 drives the movable rod 1304 to move toward the inner side of the sleeve 1301 and squeeze the first spring 1306. At this time, the squeezing locking unit does not act, and then the claws 14 are mounted on the wellhead. The two claws 14 move toward each other under the action of the gear set 15 and the first spring 1306, and initially contact the wellhead. Then the squeezing locking unit is driven to move, and further squeezing force is provided to the two claws 14, so that the two claws 14 move toward each other, and then the squeezing locking unit reaches a locked state to complete the installation.

[0074] The above-mentioned extrusion locking unit comprises:

[0075] An embedded strip groove 13012 is formed on the inner wall of the sleeve 1301 and is parallel to the axial direction of the sleeve 1301 .

[0076] A plurality of inclined guide grooves 13013 are formed on the inner wall of the sleeve 1301 and are equidistantly arranged along the length direction of the embedded strip groove 13012 . The clamping column 13041 fixed on the movable rod 1304 is adapted to the inclined guide grooves 13013 .

[0077] The rotating sleeve 1302 is rotatably mounted on the outside of the sleeve 1301 and is fixed to an extrusion plate 13022 slidably disposed in the embedded strip groove 13012 . When the rotating sleeve 1302 rotates, the clamping column 13041 in the embedded strip groove 13012 can be squeezed into the inclined guide groove 13013 .

[0078] The locking member is installed on the sleeve 1301 and is used to lock the rotating sleeve 1302 in one direction.

[0079] In the initial state, the clamping column 13041 is in the embedded strip groove 13012 and can move along the length direction of the embedded strip groove 13012. When the two claws 14 initially contact the wellhead, the rotating sleeve 1302 is manually rotated to drive the squeezing plate 13022 to move toward the direction of the clamping column 13041, thereby squeezing the clamping column 13041 into the inclined guide groove 13013. Since the inclined guide groove 13013 is in an inclined state and toward one side of the connecting rod 1303, the movable rod 1304 has a tendency to move toward the direction of the connecting rod 1303 to squeeze the claw 14 for further clamping. At the same time, due to the action of the locking piece, the rotating sleeve 1302 and the squeezing plate 13022 cannot rotate in the opposite direction, thereby achieving position limitation of the clamping column 13041 to keep the claw 14 in a continuous clamping state.

[0080] As can be seen from the above, when fixing the base 1 in this embodiment, it is only necessary to clamp the claw 14 into the wellhead position, and then rotate the rotating sleeve 1302 to achieve the clamping and locking action of the claw 14, which is simple to operate and convenient to use.

[0081] It should be additionally explained that a strip-shaped through groove 13011 is formed on the sleeve 1301 , and the fixed extrusion plate 13022 and the connecting plate of the rotating sleeve 1302 pass through the strip-shaped through groove 13011 .

[0082] Preferably, the ratio of the width of the embedded strip groove 13012 to the width of the extruded plate 13022 is 2:1.

[0083] Furthermore, the locking member comprises:

[0084] A plurality of second latch teeth 13021 are formed on the rotating sleeve 1302 .

[0085] A chuck 1308 is sleeved on the sleeve 1301 and slides axially along the sleeve 1301 . A first tooth 13081 engaging with the second tooth 13021 is formed on the side of the chuck 1308 facing the rotating sleeve 1302 . A second spring 1307 is provided on the side of the chuck 1308 away from the first tooth 13081 .

[0086] It should be noted that the first latching teeth 13081 and the second latching teeth 13021 are arranged in a trapezoidal structure, and the opposing surfaces of the first latching teeth 13081 and the second latching teeth 13021 on one side of the rotating sleeve 1302 are inclined. When the locking member is reset, the chuck 1308 is moved up and then rotated in the opposite direction to the initial position.

[0087] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0088] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A wellhead acoustic emission sensor fixing device, comprising a base (1) and a sensor sleeve (2) arranged on the base (1), characterized in that: The sensor sleeve (2) is provided with a U-shaped door opening (3), and an acoustic emission sensor (4) is installed in the sensor sleeve (2); The sensor sleeve (2) is provided with an elastic structure, the elastic structure being connected to the acoustic emission sensor (4), the elastic structure enabling the acoustic emission sensor (4) to fit tightly to the object to be measured, and the elastic structure being able to change the pressure applied to the acoustic emission sensor (4); The base (1) is symmetrically provided with fixing mechanisms on both sides, the fixing mechanisms comprising two symmetrically arranged clamping claws (14) and a telescopic connecting member (13) connecting the clamping claws (14), the telescopic connecting member (13) being used to rotate the two clamping claws (14) towards each other, squeeze them and lock them when the clamping claws (14) are clamped on the wellhead; The fixing mechanism further comprises a mounting frame (11) and a fixing frame (12) fixed to each other, wherein the mounting frame (11) is fixedly connected to the base (1); The two claws (14) are rotatably mounted on the mounting frame (11) via two rotating shafts, and the two rotating shafts are rotatably connected via a gear set (15); Two ends of the telescopic connecting member (13) are respectively hinged to the fixing frame (12) and one of the clamping claws (14); The telescopic connecting member (13) comprises: A sleeve (1301) hinged on the fixing frame (12) and a connecting rod (1303) hinged on the clamping claw (14), wherein one end of the connecting rod (1303) facing the sleeve (1301) is inserted into the sleeve (1301) and is capable of sliding along the axial direction of the sleeve (1301); a movable rod (1304) movably arranged in the sleeve (1301), one end of the movable rod (1304) being rotatably connected to the connecting rod (1303) via a rotating disk (1305), and the other end of the movable rod (1304) being rotatably mounted with another rotating disk (1305), and the other rotating disk (1305) being connected to a first spring (1306) mounted in the sleeve (1301); It also comprises a pressing and locking unit, the pressing and locking unit being used to press the movable rod (1304) to rotate and to lock the position of the movable rod (1304); The extrusion locking unit comprises: An embedded strip groove (13012) formed on the inner wall of the sleeve (1301) and parallel to the axial direction of the sleeve (1301); A plurality of inclined guide grooves (13013) are formed on the inner wall of the sleeve (1301) and are arranged equidistantly along the length direction of the embedded strip groove (13012); a clamping column (13041) fixed on the movable rod (1304) is adapted to the inclined guide grooves (13013); A rotating sleeve (1302) is rotatably mounted on the outside of the sleeve (1301), the rotating sleeve (1302) being fixed to an extrusion plate (13022) slidably disposed in the embedded strip groove (13012), and the rotating sleeve (1302) is capable of squeezing a clamping column (13041) located in the embedded strip groove (13012) toward the inclined guide groove (13013) when rotating; A locking member, mounted on the sleeve (1301) and used to perform one-way locking on the rotating sleeve (1302); The locking member comprises: A plurality of second latch teeth (13021) formed on the rotating sleeve (1302); A chuck (1308) is sleeved on the sleeve (1301) and slides axially along the sleeve (1301), wherein a first latching tooth (13081) is formed on a side of the chuck (1308) facing the rotating sleeve (1302) and is engaged with the second latching tooth (13021), and a second spring (1307) is provided on a side of the chuck (1308) away from the first latching tooth (13081).

2. A wellhead acoustic emission sensor fixing device according to claim 1, characterized in that: The elastic structure comprises a screw rod (5), a movable disc (6) and a No. 1 spring (7); a through hole (201) is provided at the top of the sensor sleeve (2); one end of the screw rod (5) passes through the through hole (201) and extends into the interior of the sensor sleeve (2); The movable disc (6) is threadedly connected to the screw rod (5); a threaded hole (401) is provided at the top of the acoustic emission sensor (4); one end of the screw rod (5) extends into the threaded hole (401) and meshes with each other; The No. 1 spring (7) is sleeved on the outside of the screw rod (5), and two ends of the No. 1 spring (7) are respectively in contact with the inner top of the sensor sleeve (2) and the top of the moving disc (6).

3. A wellhead acoustic emission sensor fixing device according to claim 1, characterized in that: The base (1) is also provided with an adsorption component, the adsorption component comprising a fixed magnet (8) and a screw (9); a receiving groove (101) is provided at the bottom of the base (1), and the fixed magnet (8) is fixedly mounted in the receiving groove (101) by means of the screw (9).

4. A wellhead acoustic emission sensor fixing device according to claim 1, characterized in that: The base (1) is provided with grooves (10), the number of the grooves (10) being four, the four grooves (10) being respectively located at the four corners of the top of the base (1), and the cable ties are passed around the grooves (10) to fix the base (1).

5. A wellhead acoustic emission sensor fixing device according to claim 1, characterized in that: The ratio of the width of the embedded strip groove (13012) to the width of the extruded plate (13022) is 2:1.

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