Underwater passive axial loading test device for acoustic releaser

Abstract

The invention relates to the technical field of acoustic releaser testing devices, in particular to an acoustic releaser underwater passive axial loading testing device which comprises a tank body, a machine frame, a machine base and a vertical supporting column are arranged in the tank body, and the machine frame and the machine base are arranged on the upper portion and the lower portion in the tank body respectively. The upper end and the lower end of the supporting column are connected with the machine frame and the machine base respectively, the supporting column is connected with a horizontal thrust rod in a sliding mode, and the thrust rod is connected with a pressure applying assembly used for applying vertically-downward acting force to the thrust rod. The thrust rod and the pressure applying assembly are arranged on the supporting column in the tank body, and the acting force applied by the pressure applying assembly is transmitted to the hook claw on the lower portion of the releaser body through the thrust rod to simulate the tension state of the releaser body before the load is released, namely, the load tension working condition of the releaser body under the deep sea pressure is effectively simulated; therefore, the actual working environment of the releaser body is accurately simulated, and the overall practicability and reliability of the testing device are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic release testing devices, and specifically to an underwater passive axial loading testing device for acoustic releases. Background Art

[0002] As an underwater device used for recovering mooring deployments, the acoustic release is a relatively stable underwater device auxiliary recovery tool on the current market. Its simple working principle and stable working performance make it an essential equipment for researchers to recover devices in the field of marine environmental monitoring, and it plays an important role in marine observation, resource exploration, and device deployment and recovery. In order to ensure that the acoustic release can serve reliably and for a long time in the deep sea, it is necessary to test the release ability and sealing performance of the acoustic release to ensure its waterproof performance in the deep sea environment and prevent water leakage or other abnormal phenomena. Currently, the acoustic release is usually placed in a pressure-resistant tank, and the inside of the pressure-resistant tank is pressurized to simulate the deep sea pressure for testing the release ability and sealing performance.

[0003] However, the above testing method lacks the simulation of the load tension on the acoustic release. For an acoustic release working under the coupled action of deep sea pressure and large load tension, the above testing method has a large deviation from the actual application environment of the acoustic release, with low simulation accuracy, low reliability of the measured results, and no reference value. At the same time, due to the limitations of its own volume and structural strength, the current pressure-resistant tank cannot accurately simulate the load tension by adding weights inside the pressure-resistant tank. Therefore, there is an urgent need to design an underwater passive axial loading testing device for acoustic releases to accurately simulate and implement the testing of the release ability and sealing performance of acoustic releases under the coupled action of deep sea pressure and load tension. Summary of the Invention

[0004] The purpose of the present invention is to provide an underwater passive axial loading testing device for acoustic releases in view of the deficiencies of the prior art, so as to solve the problems in the prior art that there is a lack of simulation of the load tension on the acoustic release, the reliability of the test results is low, there is no reference value, and it is impossible to accurately simulate the load tension by adding weights inside the pressure-resistant tank.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: An underwater passive axial loading test device for an acoustic release includes a tank for installing the release body. Inside the tank, there is a frame, a base, and a vertical support column for connecting the release body. The frame and the base are respectively arranged above and below inside the tank. The upper and lower ends of the support column are respectively connected to the frame and the base. A horizontal thrust rod is connected between the two support columns. The horizontal two side ends of the thrust rod are respectively slidably sleeved outside the support column. Above the horizontal two side ends of the thrust rod, there is a pressure application component for applying a vertically downward acting force to the thrust rod.

[0006] Furthermore, a plurality of auxiliary support columns are connected between the frame and the base.

[0007] Furthermore, there are two auxiliary support columns, which are respectively arranged on the vertical symmetry axis of the base, and the two support columns are respectively offset from the horizontal symmetry axis of the base.

[0008] Even further, the pressure application component includes a spring sleeved outside the support column. The lower part of the spring is connected to the thrust rod. The upper part of the spring is connected with a washer sleeved outside the support column. There is a thrust nut abutted against the upper part of the washer. The side wall of the corresponding support column is provided with an external thread.

[0009] Even further, a shock-absorbing sleeve for receiving the thrust rod after release is provided below the thrust rod. The shock-absorbing sleeve is fixedly sleeved on the support column.

[0010] Even further, a buffer cushion for receiving the hook of the release body after release is connected between the two shock-absorbing sleeves in the horizontal direction. A card slot for clamping the tip of the hook is opened on the upper part of the buffer cushion.

[0011] Furthermore, the frame includes an upper support ring and a support frame. The support frame is fixedly connected to the inner wall of the tank. The upper support ring is arranged in the middle of the support frame. The base includes a lower support ring and a support seat. The support seat is fixedly connected to the bottom wall of the tank. The lower support ring is arranged in the middle of the support seat. The upper support ring and the lower support ring are coaxially arranged. The upper part of the support column is detachably connected to the upper support ring, and the lower part of the support column is detachably connected to the lower support ring.

[0012] Even further, the upper support ring is provided with bolt holes in the horizontal direction, and a crossbeam bolt for movably connecting with the release body is connected at the corresponding bolt holes.

[0013] Even further, a sleeve for limiting the release body in the horizontal direction is sleeved on the crossbeam bolt.

[0014] Even further, the upper support ring is threadedly connected to the upper part of the support column, and the lower support ring is bolted to the lower part of the support column.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, a thrust rod is provided on a support column inside the tank body, and a pressure - applying assembly for applying a vertically downward acting force to the thrust rod. The acting force applied by the pressure - applying assembly is transmitted to the claw at the lower part of the releaser body through the thrust rod, so as to simulate the tensile state of the releaser body before releasing the load, that is, effectively simulate the load - tensile working condition of the releaser body under deep - sea pressure, and then accurately simulate the actual working environment of the releaser body, enhancing the overall practicality and reliability of the testing device.

[0016] In addition, through the cooperation of the thrust nut and the spring, the present invention can apply a tensile load of several tons to more than ten tons to the releaser body within the limited space of the tank body without changing the original volume of the tank body. At the same time, through the cooperation of the thrust nut and the external thread of the support column, in the preparation stage of the sealing performance test, according to the specific value of the simulated tensile force actually required, the precise control of the compression degree of the spring can be achieved by adjusting the displacement of the thrust nut in the vertical direction. This adjustment mechanism enables the spring to store corresponding elastic potential energy, and a thrust consistent with the expected tensile force can be generated without an additional gravity source, thereby accurately and effectively simulating the load - tensile working condition of the releaser body.

[0017] Moreover, through the shock - absorbing sleeve and buffer cushion located below the thrust rod, the present invention can absorb and slow down the vibration impact generated by the releaser body and the thrust rod during the release action to the greatest extent, effectively alleviating the sudden and drastic change of the load instantaneously during the release process of the releaser body, and improving the overall stability and durability of the device.

[0018] In addition, through the threaded connection between the support column and the upper support ring and the bolt connection with the lower support ring, while meeting the overall structural strength and stability of the device, it is convenient for disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall external structure of the tank body in an underwater passive axial loading test device for an acoustic releaser provided by the present invention; Figure 2 is a schematic diagram of the internal structure of the tank body in an underwater passive axial loading test device for an acoustic releaser provided by the present invention; Figure 3 is a schematic diagram of the structure of the pressure - applying assembly in an underwater passive axial loading test device for an acoustic releaser provided by the present invention; Figure 4 is a schematic diagram of the connection structure between the pressure - applying assembly and the releaser body in an underwater passive axial loading test device for an acoustic releaser provided by the present invention; Figure 5This is a top-down sectional view of the pressure application component in an underwater passive axial loading test device for an acoustic release provided by the present invention.

[0020] Among them, the reference numerals are as follows: 1. Tank body; 2. Support column; 21. External thread; 3. Thrust rod; 4. Pressure application component; 41. Spring; 42. Washer; 43. Thrust nut; 5. Release body; 51. Lifting lug; 52. Hook claw; 6. Shock-absorbing sleeve; 7. Buffer cushion; 71. Card slot; 8. Frame; 81. Upper support ring; 82. Support frame; 9. Machine base; 91. Lower support ring; 92. Support base; 10. Cross beam bolt; 101. Sleeve; 20. Auxiliary support column. Detailed implementation manners

[0021] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0022] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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 to this application.

[0024] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0025] For ease of understanding, please refer to Figures 1 to 2 , this embodiment provides an underwater passive axial loading test device for an acoustic release, including a tank body 1. Inside the tank body 1, there is a rack 8, a base 9, and support columns 2. The horizontal outer end of the rack 8 is fixedly connected to the inner wall of the tank body 1. The base 9 is fixedly connected to the bottom wall of the tank body 1. There are two support columns 2, which are respectively vertically arranged between the rack 8 and the base 9. A thrust rod 3 is horizontally connected between the two support columns 2. A pressure application assembly 4 is connected to the thrust rod 3. The pressure application assembly 4 is used to apply a vertically downward force to the thrust rod 3. The lifting lug 51 on the upper part of the release body 5 is installed on the rack 8. At the same time, the hook claw 52 of the release body 5 is set to the initial state (i.e., the closed state of the hook claw 52), and the thrust rod 3 passes through the hook claw 52 at the lower part of the release body 5. By applying a force from top to bottom to the thrust rod 3 through the pressure application assembly 4, the force of the pressure application assembly 4 is transmitted to the hook claw 52 at the lower part of the release body 5 through the thrust rod 3, thereby simulating the load tension condition of the release body 5. At the same time, liquid is injected into the tank body 1 for pressurization, thereby simulating the deep water pressure condition of the release body 5. The staff remotely controls the release body 5 outside the tank body 1 to make it perform the release action (i.e., the opening action of the hook claw 52), and then the dynamic sealing performance test of the release body 5 under the coupled state of deep sea pressure and load tension can be completed.

[0026] For ease of understanding, please refer to Figures 2 to 5 , the horizontal two side ends of the thrust rod 3 are respectively sleeved outside a support column 2 and are respectively slidably connected to the corresponding support column 2 in the vertical direction. There are two groups of pressure application assemblies 4, which are respectively connected to the thrust rod 3 above the horizontal two side ends of the thrust rod 3. The pressure application assembly 4 specifically includes a vertical spring 41. The spring 41 is sleeved outside the support column 2. The lower part of the spring 41 is fixedly connected to the thrust rod 3. The upper part of the spring 41 is fixedly connected to a washer 42 sleeved outside the support column 2. The spring 41 is made of a material with relatively high rigidity, which can store the required elastic potential energy during installation and provide a continuous thrust during the dynamic sealing detection of the release body 5. At the same time, the washer 42 plays a role in protection and support to ensure the uniform distribution of force. The upper part of the washer 42 abuts against a thrust nut 43. Corresponding external threads 21 are provided on the outer side wall of the support column 2.

[0027] The staff installs the lifting lug 51 on the upper part of the releaser body 5 on the rack 8. At the same time, after passing the thrust rod 3 through the hook 52 at the lower part of the releaser body 5, through the cooperation of the thrust nut 43 and the external thread 21 on the outer side wall of the support column 2, the thrust nut 43 is spirally moved downward, thereby pushing the washer 42 to move vertically downward to squeeze the spring 41, and the spring 41 transmits the thrust to the thrust rod 3. Since the thrust rod 3 horizontally passes through the hook 52 of the releaser body 5, the hook 52 limits the thrust rod 3 in the vertical direction, that is, the thrust rod 3 and the support column 2 remain relatively stationary, so the thrust rod 3 will not slide downward due to the upward thrust. At this time, the spring 41 deforms after being squeezed by the thrust, stores elastic potential energy, and continuously applies a thrust to the thrust rod 3. The thrust rod 3 transmits the thrust from top to bottom to the hook 52 of the releaser body 5, thereby simulating the load pulling force working condition of the releaser body 5. The staff can adjust the displacement of the thrust nut 43, thereby adjusting the deformation of the spring 41, and further adjusting the acting force applied to the releaser body 5 to meet different test requirements. Further, when adjusting the displacements of the two thrust nuts 43, the torque can be controlled by a torque wrench to ensure that the displacements of the two thrust nuts 43 are the same, thereby ensuring that the deformations of the two springs 41 are the same and ensuring that the thrust rod 3 is in a horizontal state.

[0028] For ease of understanding, please continue to refer to Figures 2 to 5, shock-absorbing sleeves 6 are provided below the horizontal two-side ends of the thrust rod 3, and the shock-absorbing sleeves 6 are fixedly sleeved on the corresponding support columns 2. A horizontally transverse buffer cushion 7 is connected between the two shock-absorbing sleeves 6, and a card slot 71 is formed in the upper part of the buffer cushion 7, and the card slot 71 corresponds to the claw tip structure of the hook claw 52. When the staff remotely controls the release body 5 from the outside of the tank body 1 to make it perform the release action, the hook claw 52 releases the closed state, and then releases the vertical limit of the thrust rod 3 by the hook claw 52. At this time, the spring 41 vertically releases the elastic potential energy and pushes the thrust rod 3 to slide vertically downward. During this process, the hook claw 52 will flip about 180°. After flipping, the claw tip of the hook claw 52 is clamped inside the card slot 71 of the buffer cushion 7. The card slot 71 provides an accurate card point for the claw tip of the hook claw 52, ensuring that the hook claw 52 can stably engage with the buffer cushion 7 after release, preventing the hook claw 52 from continuously swinging below the release body 5, and further preventing the hook claw 52 from driving the release body 5 to continuously swing inside the tank body 1 and collide with the side wall of the tank body 1, causing damage to the tank body 1 or the release body 5; at the same time, the shock-absorbing sleeve 6 located below the thrust rod 3 is used to receive the downward-sliding thrust rod 3, preventing the thrust rod 3 from having too much sliding displacement or even directly colliding with the lower base 9 due to the excessive elastic potential energy of the spring 41, causing damage to the tank body 1 or the thrust rod 3. Through the shock-absorbing sleeve 6 and the buffer cushion 7, the vibration impact generated when the release body 5 and the thrust rod 3 perform the release action is absorbed and reduced to the greatest extent, effectively alleviating the instantaneous drastic change of the load during the release process of the release body 5, and improving the overall stability and durability of the device.

[0029] For ease of understanding, please continue to refer to Figures 2 to 5, the frame 8 includes an upper support ring 81 and a support frame 82. The horizontal end of the support frame 82 is fixedly connected to the inner wall of the tank body 1. The middle part of the support frame 82 is hollow, and the upper support ring 81 is installed in the middle of the support frame 82. The base 9 includes a lower support ring 91 and a support seat 92. The support seat 92 is fixedly connected to the bottom wall of the tank body 1. A vertical groove is formed in the middle of the support seat 92, and the lower support ring 91 is installed in the middle of the support seat 92 through the groove. The upper support ring 81 and the lower support ring 91 are coaxially arranged. The upper part of the support column 2 is detachably connected to the upper support ring 81, and the lower part of the support column 2 is detachably connected to the lower support ring 91. The upper support ring 81 is provided with two coaxially arranged bolt holes in the horizontal direction. In order to meet its functional requirements, the upper support ring 81 adopts a non-integral circular ring structure design. Specifically, cutting processing is carried out on both sides of the upper support ring 81 along the direction of the bolt holes to form a rectangular bolt seat. The cutting depth is greater than the bolt diameter, so as to facilitate the installation, tightening and disassembly steps. The cross beam bolt 10 passes through the two end parts of the upper support ring 81 in the horizontal direction through the bolt holes, and the lifting lug 51 of the releaser body 5 is movably connected to the cross beam bolt 10. Sleeve 101 is sleeved on the horizontal two sides of the lifting lug 51 on the cross beam bolt 10. The outer diameter of the sleeve 101 is greater than the inner diameter of the hollow area of the lifting lug 51, that is, the lifting lug 51 is limited in the horizontal direction through the sleeve 101, so that the lifting lug 51 cannot move in the axial direction of the cross beam bolt 10. The lengths of the two sleeves 101 are the same. After installation, the lifting lug 51 is located at the center of the upper support ring 81, and further, the central axis position of the releaser body 5 is located at the center of the upper support ring 81, which helps to evenly distribute the force, reduce local stress concentration, and prevent the cross beam bolt 10 from bending or deforming due to uneven force. A vertical blind hole is formed in the lower part of the upper support ring 81. The upper support ring 81 is threadedly connected to the upper part of the support column 2 through the blind hole. The lower support ring 91 is provided with a vertical through hole, and the lower support ring 91 is bolted to the lower part of the support column 2 through the through hole. Further, in order to further ensure the overall stability of the device, two auxiliary support columns 20 are also connected between the upper support ring 81 and the lower support ring 91. The two support columns 2 and the two auxiliary support columns 20 are all located between the upper support ring 81 and the lower support ring 91, and jointly constitute the main support structure of the overall device, providing a stable support effect to ensure that the overall device can maintain stability during various experimental operations. Specifically, the upper support ring 81 is threadedly connected to the upper part of the auxiliary support column 20 through the blind hole, and the lower support ring 91 is bolted to the lower part of the auxiliary support column 20 through the through hole. Furthermore, both the support column 2 and the auxiliary support column 20 are spaced from the releaser body 5 in the middle by a distance of more than one hook claw 52, ensuring that there is enough space for movement inside the support frame formed by enclosing the upper support ring 81, the lower support ring 91, the support column 2 and the auxiliary support column 20, which is convenient for installation and disassembly.

[0030] For ease of understanding, please continue to refer to Figure 5, since the hook 52 at the lower part of the release body 5 is not located on the central axis of the release body 5 and there is a certain offset of the hook 52, the two auxiliary support columns 20 are arranged on the vertical symmetry axis of the upper support ring 81, and the two support columns 2 are offset above the horizontal symmetry axis of the upper support ring 81. The axis lines of the two support columns 2 respectively pass through the centers of the horizontal two-side ends of the thrust rod 3, so that when a vertical force is applied to the thrust rod 3 through the thrust assembly, the acoustic release body 5 remains in a vertical state, more accurately simulating the load tension condition of the release body 5 underwater. At the same time, it helps to strengthen the consistency of the overall structure of the device, avoid stress concentration between the support column 2 and the thrust rod 3, and thus form a more stable support structure.

[0031] The usage method of the present invention: First, the staff threadedly connects the two support columns 2 equipped with the pressure application assembly 4 and the thrust rod 3, and the two auxiliary support columns 20 to the blind holes of the upper support ring 81 respectively, to realize the relative fixation of the support columns 2 and the auxiliary support columns 20 to the upper support ring 81. Then, the two-side ends of the shock-absorbing sleeve 6 are sleeved on the support columns 2, and the buffer cushion 7 is moved to a preset position below the thrust rod 3. After that, the two support columns 2 and the two auxiliary support columns 20 are respectively bolted to the through holes of the lower support ring 91 to realize the relative fixation of the support columns 2 and the auxiliary support columns 20 to the lower support ring 91, that is, the installation of the overall support frame is completed. After passing the crossbeam bolt 10 through a bolt hole of the upper support ring 81, successively sleeving a sleeve 101, the lifting lug 51 on the upper part of the release body 5, and another sleeve 101 on the crossbeam bolt 10, then passing the crossbeam bolt 10 through another bolt hole, and realizing the relative fixation of the crossbeam bolt 10 to the upper support ring 81 through a locking nut, and at the same time realizing the horizontal limit of the release body 5, that is, the installation of the release body 5 is completed. Pass the thrust rod 3 through the hook 52 at the lower part of the release body 5, and set the hook 52 of the release body 5 to a closed state. By rotating the thrust nut 43, control the compression degree of the spring 41 to reach the predetermined axial force magnitude, that is, the simulation of the load tension condition of the release body 5 is completed. Place the support frame equipped with the release body 5 corresponding to the hollow part of the upper support ring 81 and the groove of the lower support ring 91, and place it inside the tank body 1 from the valve opening above the tank body 1. Then close the valve above the tank body 1 and inject liquid into the tank body 1 for pressurization, that is, the simulation of the deep-sea pressure condition of the release body 5 is completed. Since the self-weight of the support frame and the release body 5 is greater than the buoyancy force received, the support frame remains in a static state and will not float during the experiment. The staff remotely controls the release body 5 outside the tank body 1 to make it perform the release action, that is, the dynamic sealing performance detection of the release body 5 is completed.

[0032] Although the present invention has been described by using the above preferred embodiments, it is not intended to limit the protection scope of the present invention. Any person skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and these still fall within the protection scope of the present invention.

Claims

1. An underwater passive axial loading test device for an acoustic releaser, comprising a tank (1) for mounting a releaser body (5), characterized in that: A frame (8) and a base (9) for connecting the releaser body (5) and two vertical support columns (2) are arranged inside the tank body (1). The frame (8) and the base (9) are respectively arranged at the upper and lower parts of the tank body (1). The upper and lower ends of the support column (2) are respectively connected to the frame (8) and the base (9). A horizontal thrust rod (3) is connected between the two support columns (2). The horizontal side ends of the thrust rod (3) are respectively slidably sleeved on the outer sides of the support columns (2). The upper parts of the horizontal side ends of the thrust rod (3) are connected to pressure components (4) for applying a vertical downward force to the thrust rod (3).

2. The underwater passive axial loading test device for acoustic releaser according to claim 1 is characterized in that: A plurality of auxiliary support columns (20) are connected between the frame (8) and the base (9).

3. The underwater passive axial loading test device for acoustic releaser according to claim 2 is characterized in that: There are two auxiliary support columns (20), which are respectively arranged on the vertical symmetry axis of the machine base (9), and the two support columns (2) are respectively arranged offset on the horizontal symmetry axis of the machine base (9).

4. The underwater passive axial loading test device for acoustic releaser according to claim 1 is characterized in that: The pressure-applying assembly (4) comprises a spring (41) sleeved on the outside of the support column (2); the lower part of the spring (41) is connected to the thrust rod (3); the upper part of the spring (41) is connected to a washer (42) sleeved on the outside of the support column (2); the upper part of the washer (42) is in contact with a thrust nut (43); and the side wall of the corresponding support column (2) is provided with an external thread (21).

5. The underwater passive axial loading test device for acoustic releaser according to claim 1 or 4, characterized in that: A shock-absorbing sleeve (6) is provided below the thrust rod (3) for receiving the thrust rod (3) after release, and the shock-absorbing sleeve (6) is fixedly sleeved on the support column (2).

6. The underwater passive axial loading test device for acoustic releaser according to claim 5 is characterized in that: A buffer pad (7) for receiving the hook claw (52) of the releaser body (5) after release is connected between the two shock-absorbing sleeves (6) in the horizontal direction, and a clamping groove (71) for clamping the claw tip of the hook claw (52) is provided on the upper part of the buffer pad (7).

7. The underwater passive axial loading test device for acoustic releaser according to claim 1 is characterized in that: The frame (8) comprises an upper support ring (81) and a support frame (82), the support frame (82) is fixedly connected to the inner wall of the tank body (1), the upper support ring (81) is arranged in the middle of the support frame (82), the base (9) comprises a lower support ring (91) and a support seat (92), the support seat (92) is fixedly connected to the bottom wall of the tank body (1), the lower support ring (91) is arranged in the middle of the support seat (92), the upper support ring (81) is arranged coaxially with the lower support ring (91), the upper part of the support column (2) is detachably connected to the upper support ring (81), and the lower part of the support column (2) is detachably connected to the lower support ring (91).

8. The underwater passive axial loading test device for acoustic releaser according to claim 7 is characterized in that: The upper support ring (81) is provided with bolt holes in the horizontal direction, and corresponding to the bolt holes, crossbeam bolts (10) for movably connecting with the releaser body (5) are connected.

9. The underwater passive axial loading test device for acoustic releaser according to claim 8, characterized in that: The crossbeam bolt (10) is sleeved with a sleeve (101) for limiting the horizontal position of the releaser body (5).

10. The underwater passive axial loading test device for acoustic releaser according to claim 7, characterized in that: The upper support ring (81) is threadedly connected to the upper part of the support column (2), and the lower support ring (91) is bolted to the lower part of the support column (2).

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