An audio acquisition module for pipeline leakage monitoring

Abstract

The utility model provides an audio acquisition module for pipeline leakage monitoring, including a shell, a support rod, a piezoelectric ceramic sheet and a conductive element. The shell encloses to form a closed space for accommodating the piezoelectric ceramic sheet. The shell includes an upper top cover, a cylinder and a lower bottom cover. The upper and lower ends of the cylinder are open. The upper top cover is used to close the opening at the upper end of the cylinder. The lower bottom cover is detachably connected to the lower end opening of the cylinder. The lower bottom cover is used to close the opening at the lower end of the cylinder. The two ends of the support rod are used to connect with the upper top cover. The upper end of the conductive element contacts the bottom surface of the piezoelectric ceramic sheet. The lower bottom cover is formed with a mounting hole. The lower end of the conductive element passes through the mounting hole to abut against the outer wall of the pipeline to be tested. The bottom end of the support rod is provided with an abutment sheet. The bottom surface of the abutment sheet is used to abut against the top surface of the piezoelectric ceramic sheet so that the bottom surface of the piezoelectric ceramic sheet fits the upper end of the conductive element. The utility model aims to propose an audio acquisition module for pipeline leakage monitoring with high detection accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline leakage detection, in particular to an audio acquisition module applied to pipeline leakage monitoring. Background Art

[0002] At present, many urban areas have serious leakage and leakage problems due to aging water supply pipelines, which wastes a lot of water resources. In order to prevent water waste and save effective water resources, it is necessary to conduct pipeline leak detection. Pipeline leak detection means that when a water supply pipeline leaks, water overflows from the damaged part of the pipeline (leakage point) under pressure. During the overflow process, the water will rub against the surrounding medium and generate noise, which will spread along the pipeline to the surrounding. At this time, the sound of the leakage can be obtained through the microphone, and the exact location of the leakage point can be determined after processing.

[0003] Pipeline leakage inspection can promptly discover the leaking parts of the pipeline, facilitate timely repair or replacement of the leaking pipeline, effectively reduce the leakage rate of the water supply network, and save project investment and water supply costs.

[0004] Currently, the detection method for water supply pipeline leakage points mostly uses handheld audio sensors for detection. Handheld audio sensors are easily interfered by external noise, resulting in poor detection accuracy.

[0005] Therefore, it is necessary to propose an audio acquisition module with high detection accuracy for pipeline leakage monitoring. Utility Model Content

[0006] The main purpose of the utility model is to provide an audio acquisition module with high detection accuracy and applied to pipeline leakage monitoring.

[0007] To achieve the above-mentioned purpose, the utility model proposes an audio acquisition module for pipeline leakage monitoring, comprising a shell, a support rod, a piezoelectric ceramic sheet and a conductive element, wherein the shell encloses a closed space for accommodating the piezoelectric ceramic sheet, the shell comprises an upper top cover, a cylinder and a lower bottom cover, the cylinder is a cylinder, and the upper and lower ends of the cylinder are open, the upper top cover is used to close the opening at the upper end of the cylinder, the lower bottom cover is detachably connected to the lower end opening of the cylinder, and the lower bottom cover is used to close the opening at the lower end of the cylinder, and the support rod is used to be connected to the upper top cover between the two ends, the upper end of the conductive element contacts the bottom surface of the piezoelectric ceramic sheet, the lower bottom cover is formed with a mounting hole along the length direction of the cylinder, the lower end of the conductive element passes through the mounting hole to abut against the outer wall surface of the pipeline to be measured, and the bottom end of the support rod is provided with an abutting sheet, and the bottom surface of the abutting sheet is used to abut against the top surface of the piezoelectric ceramic sheet so that the bottom surface of the piezoelectric ceramic sheet fits the upper end of the conductive element.

[0008] Preferably, the conductive element includes a conductive sheet and a conductive rod, the lower end of the conductive rod is used to abut against the outer wall surface of the pipeline to be tested, the upper end of the conductive rod is connected to the conductive sheet, the top surface of the conductive sheet is in contact with the bottom surface of the piezoelectric ceramic sheet, and the conductive rod is inserted into the mounting hole.

[0009] Preferably, a threaded section is formed between the two ends of the support rod, and the upper cover of the cylinder is formed with a threaded hole along the length direction of the cylinder. The threaded section of the support rod is rotatably inserted into the threaded hole so that the support rod can move along the length direction of the cylinder when it rotates.

[0010] Preferably, the top surface of the lower bottom cover is recessed toward the bottom surface of the lower bottom cover to form a mounting groove, the piezoelectric ceramic sheet is installed at the bottom of the mounting groove, the abutment sheet can move in the mounting groove along the length direction of the cylinder, and the mounting hole is connected to the bottom of the mounting groove.

[0011] Preferably, the audio acquisition module used for pipeline leakage monitoring also includes a signal transmission element and a circuit board. The signal transmission element is arranged on the top surface of the upper cover, and the circuit board is arranged in the cylinder along the length direction of the cylinder. The piezoelectric ceramic sheet is electrically connected to one end of the circuit board facing the opening of the lower end of the cylinder, and one end of the circuit board facing the opening of the upper end of the cylinder is connected to the signal transmission element through a signal line, and the upper cover is formed with a through hole for the signal line to pass through.

[0012] Preferably, the piezoelectric ceramic sheet is connected to the end of the circuit board facing the lower opening through multiple wires, and the side wall of the mounting groove is recessed in the radial direction of the cylinder to form multiple wire grooves, and the length direction of the wire grooves is consistent with the length direction of the cylinder.

[0013] Preferably, the lower bottom cover includes a concentrically arranged mounting seat and a sealing cover, one end of the mounting seat is used to abut against the outer wall surface of the pipe to be tested, the other end of the mounting seat is connected to the bottom surface of the sealing cover, the top surface of the sealing cover extends away from the mounting seat, and the sealing cover is used to close the lower end opening of the cylinder.

[0014] Preferably, the cylinder comprises an outer shell layer and an inner shell layer which are arranged concentrically, and a vacuum space is formed between the outer shell layer and the inner shell layer. A sealing ring is arranged around the side wall surface of the sealing cover, and the sealing ring is arranged concentrically with the lower bottom cover.

[0015] Preferably, the audio acquisition module applied to pipeline leakage monitoring also includes a fixing ring, which includes a first arc-shaped fixing plate and a second arc-shaped fixing plate that are arranged in a mirror image. The lower end of the cylinder is provided with a first connecting structure and a second connecting structure. The upper end of the first arc-shaped fixing plate is rotatably connected to the first connecting structure, and the upper end of the second arc-shaped fixing plate is rotatably connected to the second connecting structure. The first arc-shaped fixing plate and the second arc-shaped fixing plate are used to approach each other to be clamped on the outer wall surface of the pipeline, and the first arc-shaped fixing plate and the second arc-shaped fixing plate are used to move away from each other to detach from the pipeline.

[0016] Preferably, a force-bearing structure is formed at the upper end of the support rod, and the force-bearing structure includes a connecting ring and a force-bearing plate, the inner wall surface of the connecting ring surrounds the outer wall surface of the upper end of the support rod, one end of the force-bearing plate is connected to the outer wall surface of the connecting ring, and the other end of the force-bearing plate extends away from the connecting ring along the radial direction of the cylinder.

[0017] In the technical solution of the utility model, by arranging the support rod, the abutment sheet and the conducting element, the bottom surface of the abutment sheet is affixed to the top surface of the piezoelectric ceramic sheet, the bottom surface of the piezoelectric ceramic sheet is pressed against the upper end of the conducting element, and the lower end of the conducting element is abutted against the outer wall surface of the pipeline to be tested, the vibration of the pipeline can be directly transmitted to the piezoelectric ceramic sheet through the conducting element, so that the piezoelectric ceramic sheet can more sensitively receive the vibration of the pipeline to be tested, thereby improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of an audio acquisition module for pipeline leakage monitoring according to the utility model;

[0020] Figure 2 This is an exploded view of the audio acquisition module;

[0021] Figure 3 It is a front view of the audio acquisition module;

[0022] Figure 4 A cross-sectional view of the lower cover.

[0023] Description of Figure Numbers:

[0024] 1-upper cover; 2-cylinder; 3-lower cover; 31-mounting slot; 32-mounting hole; 4-support rod; 41-abutment plate; 42-force-bearing structure; 5-piezoelectric ceramic plate; 6-conduction element; 61-conduction plate; 62-conduction rod; 7-signal transmission element.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The utility model provides an audio acquisition module applied to pipeline leakage monitoring.

[0032] Please refer to Figures 1 to 4 The audio acquisition module for pipeline leakage monitoring includes a shell, a support rod 4, a piezoelectric ceramic sheet 5 and a conductive element 6. The shell is enclosed to form a closed space for accommodating the piezoelectric ceramic sheet 5. The shell includes an upper cover 1, a cylinder 2 and a lower cover 3. The cylinder 2 is a cylinder with openings at both ends. The upper cover 1 is used to close the opening at the upper end of the cylinder 2. The lower cover 3 is detachably connected to the lower end opening of the cylinder 2. The lower cover 3 is used to close the opening at the lower end of the cylinder 2. The support rod 4 is used to connect with the upper cover 1 between the two ends, the upper end of the conductive element 6 contacts the bottom surface of the piezoelectric ceramic sheet 5, the lower cover 3 is formed with a mounting hole 32 along the length direction of the cylinder 2, the lower end of the conductive element 6 passes through the mounting hole 32 to abut against the outer wall of the pipeline to be tested, and the bottom end of the support rod 4 is provided with an abutting piece 41, the bottom surface of the abutting piece 41 is used to abut against the top surface of the piezoelectric ceramic sheet 5, so that the bottom surface of the piezoelectric ceramic sheet 5 fits the upper end of the conductive element 6. In this embodiment, the abutting piece 41 and the piezoelectric ceramic sheet 5 are circular pieces, the mounting groove 31 is a circular groove, and the size of the conductive piece 61 is consistent with the size of the piezoelectric ceramic sheet 5.

[0033] In the technical solution of the utility model, by arranging the support rod 4, the abutment sheet 41 and the conducting element 6, the bottom surface of the abutment sheet 41 is affixed to the top surface of the piezoelectric ceramic sheet 5, the bottom surface of the piezoelectric ceramic sheet 5 is pressed tightly against the upper end of the conducting element 6, and the lower end of the conducting element 6 is abutted against the outer wall surface of the pipeline to be tested, the vibration of the pipeline can be directly transmitted to the piezoelectric ceramic sheet 5 through the conducting element 6, so that the piezoelectric ceramic sheet 5 can more sensitively receive the vibration of the pipeline to be tested, thereby improving the accuracy of detection.

[0034] Preferably, the conductive element 6 comprises a conductive sheet 61 and a conductive rod 62, the lower end of the conductive rod 62 is used to abut against the outer wall of the pipe to be tested, the upper end of the conductive rod 62 is connected to the conductive sheet 61, the top surface of the conductive sheet 61 is in contact with the bottom surface of the piezoelectric ceramic sheet 5, and the conductive rod 62 is inserted into the mounting hole 32. In this embodiment, the conductive sheet 61 is a circular sheet, the conductive rod 62 is a round rod, the conductive rod 62 is concentrically arranged with the conductive sheet 61, and the size of the conductive sheet 61 is consistent with the size of the abutting sheet 41.

[0035] Preferably, a threaded section is formed between the two ends of the support rod 4, and a threaded hole is formed on the upper cover 1 of the cylinder 2 along the length direction of the cylinder 2. The threaded section of the support rod 4 is rotatably inserted into the threaded hole so that the support rod 4 can move along the length direction of the cylinder 2 when it is rotated. The threaded section and the threaded hole are provided so that the support rod 4 can move along the length direction of the cylinder 2 when it is rotated, which is convenient for the operator to rotate the support rod 4 to adjust the pressure on the piezoelectric ceramic sheet 5.

[0036] Preferably, the top surface of the lower bottom cover 3 is recessed toward the bottom surface of the lower bottom cover 3 to form a mounting groove 31, the piezoelectric ceramic sheet 5 is mounted at the bottom of the mounting groove 31, the abutment sheet 41 can move in the mounting groove 31 along the length direction of the cylinder 2, and the mounting hole 32 is connected to the bottom of the mounting groove 31. Providing the mounting groove 31 and mounting the piezoelectric ceramic sheet 5 at the bottom of the mounting groove 31 can reduce the interval between the piezoelectric ceramic sheet 5 and the outer wall of the pipeline, and improve the sensitivity of the piezoelectric ceramic sheet 5 to receive pipeline vibration. Specifically, the abutment sheet 41 moves in the mounting groove 31 along the length direction of the cylinder 2 to fit the bottom surface of the abutment sheet 41 to the top surface of the piezoelectric ceramic sheet 5.

[0037] Preferably, the audio acquisition module used for pipeline leakage monitoring also includes a signal transmission element 7 and a circuit board. The signal transmission element 7 is arranged on the top surface of the upper cover 1, and the circuit board is arranged in the cylinder 2 along the length direction of the cylinder 2. The piezoelectric ceramic sheet 5 is electrically connected to the end of the circuit board facing the lower end opening of the cylinder 2, and the end of the circuit board facing the upper end opening of the cylinder 2 is connected to the signal transmission element 7 through a signal line. The upper cover 1 is formed with a through hole for the signal line to pass through. The circuit board is used to receive the charge signal of the piezoelectric ceramic sheet 5 and convert the charge signal into a voltage signal. Then, the voltage signal is converted into a sound signal and transmitted to the signal transmission element 7. The signal transmission element 7 is used to transmit the sound signal to an external receiver. In this embodiment, the signal transmission element 7 uses wireless transmission to transmit the sound signal to the external receiver. Of course, the signal transmission element 7 can also be connected to the external receiver through a signal line and use wired transmission to transmit the sound signal to the external receiver.

[0038] Preferably, the piezoelectric ceramic sheet 5 is connected to the end of the circuit board facing the lower opening through a plurality of wires, and the side wall of the mounting groove 31 is recessed in the radial direction of the cylinder 2 to form a plurality of wire grooves, and the length direction of the wire grooves is consistent with the length direction of the cylinder 2. The wire grooves are provided, and the wires are placed in the wire grooves to prevent the wires from interfering with the movement of the abutment sheet 41 in the mounting groove 31.

[0039] Preferably, the lower bottom cover 3 includes a concentrically arranged mounting seat and a sealing cover, one end of the mounting seat is used to abut against the outer wall surface of the pipeline to be tested, the other end of the mounting seat is connected to the bottom surface of the sealing cover, the top surface of the sealing cover extends away from the mounting seat, and the sealing cover is used to close the lower end opening of the cylinder 2. In this embodiment, the bottom surface of the mounting seat is formed with a fixing groove for fitting on the outer wall surface of the pipeline.

[0040] Preferably, the cylinder 2 comprises an outer shell layer and an inner shell layer which are arranged concentrically, the outer shell layer and the inner shell layer enclose a vacuum space, and a sealing ring is arranged around the side wall of the sealing cover, and the sealing ring is arranged concentrically with the lower bottom cover 3. The vacuum space is provided to reduce the interference of external noise on the piezoelectric ceramic sheet 5 and improve the detection accuracy; the sealing ring is provided to reduce the probability of external water vapor entering the enclosed space.

[0041] Preferably, the fixing structure includes a fixing ring, the fixing ring includes a first arc-shaped fixing piece and a second arc-shaped fixing piece that are arranged in a mirror image, the lower end of the cylinder 2 is provided with a first connecting structure and a second connecting structure, the upper end of the first arc-shaped fixing piece is rotatably connected to the first connecting structure, the upper end of the second arc-shaped fixing piece is rotatably connected to the second connecting structure, the first arc-shaped fixing piece and the second arc-shaped fixing piece are used to approach each other to clamp on the outer wall surface of the pipeline, and the first arc-shaped fixing piece and the second arc-shaped fixing piece are used to move away from each other to detach from the pipeline. In this embodiment, a first through hole is formed at one end of the first arc-shaped fixing piece away from the first connecting structure, and a second through hole is formed at one end of the second arc-shaped fixing piece away from the second connecting structure, the fixing ring also includes a nut and a bolt, the bolt is used to pass through the first through hole and the second through hole when the lower end of the first arc-shaped fixing piece and the lower end of the second arc-shaped fixing piece are fitted, and the nut is used to cooperate with the nut to lock the lower end of the first arc-shaped fixing piece and the lower end of the second arc-shaped fixing piece.

[0042] Preferably, a force-bearing structure 42 is formed at the upper end of the support rod 4, and the force-bearing structure 42 includes a connecting ring and a force-bearing sheet, the inner wall surface of the connecting ring surrounds the outer wall surface of the upper end of the support rod 4, one end of the force-bearing sheet is connected to the outer wall surface of the connecting ring, and the other end of the force-bearing sheet extends away from the connecting ring in the radial direction of the cylinder 2. The force-bearing structure 42 is provided to facilitate the operator to rotate the support rod 4.

[0043] Specifically, the support rod 4 is a round rod, the support rod 4 is concentrically arranged with the cylinder 2, and the support rod 4 is provided with a limit ring at both ends of the threaded section to prevent the threaded section from slipping out of the threaded hole. In this embodiment, the limit ring is a circular ring, and the inner wall surface of the limit ring is connected to the outer wall surface of the support rod 4.

[0044] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An audio acquisition module for pipeline leakage monitoring, characterized in that: The utility model comprises a shell, a support rod, a piezoelectric ceramic sheet and a conducting element, wherein the shell encloses a closed space for accommodating the piezoelectric ceramic sheet, the shell comprises an upper top cover, a cylinder and a lower bottom cover, the cylinder is a cylinder, and the upper and lower ends of the cylinder are opened, the upper top cover is used to close the opening at the upper end of the cylinder, the lower bottom cover is detachably connected to the lower end opening of the cylinder, and the lower bottom cover is used to close the opening at the lower end of the cylinder, and the two ends of the support rod are used to be connected to the upper top cover, the upper end of the conducting element contacts the bottom surface of the piezoelectric ceramic sheet, the lower bottom cover is formed with a mounting hole along the length direction of the cylinder, the lower end of the conducting element passes through the mounting hole to abut against the outer wall surface of the pipeline to be tested, and the bottom end of the support rod is provided with an abutting sheet, the bottom surface of the abutting sheet is used to abut against the top surface of the piezoelectric ceramic sheet, so that the bottom surface of the piezoelectric ceramic sheet fits the upper end of the conducting element.

2. The audio acquisition module for pipeline leakage monitoring according to claim 1 is characterized in that: The conductive element includes a conductive sheet and a conductive rod. The lower end of the conductive rod is used to abut against the outer wall of the pipeline to be tested. The upper end of the conductive rod is connected to the conductive sheet. The top surface of the conductive sheet contacts the bottom surface of the piezoelectric ceramic sheet. The conductive rod is inserted into the mounting hole.

3. The audio acquisition module for pipeline leakage monitoring according to claim 2 is characterized in that: A threaded section is formed between the two ends of the support rod, and the upper cover of the cylinder is formed with a threaded hole along the length direction of the cylinder. The threaded section of the support rod is rotatably inserted into the threaded hole so that the support rod can move along the length direction of the cylinder when it rotates.

4. The audio acquisition module for pipeline leakage monitoring according to claim 3 is characterized in that: The top surface of the lower bottom cover is recessed toward the bottom surface of the lower bottom cover to form a mounting groove, the piezoelectric ceramic sheet is mounted at the bottom of the mounting groove, the abutment sheet can move in the mounting groove along the length direction of the cylinder, and the mounting hole is connected to the bottom of the mounting groove.

5. The audio acquisition module for pipeline leakage monitoring according to claim 4 is characterized in that: It also includes a signal transmission element and a circuit board, wherein the signal transmission element is arranged on the top surface of the upper cover, and the circuit board is arranged in the cylinder along the length direction of the cylinder, the piezoelectric ceramic sheet is electrically connected to an end of the circuit board facing the opening of the lower end of the cylinder, and an end of the circuit board facing the opening of the upper end of the cylinder is connected to the signal transmission element through a signal line, and the upper cover is formed with a through hole for the signal line to pass through.

6. The audio acquisition module for pipeline leakage monitoring according to claim 5 is characterized in that: The piezoelectric ceramic sheet is connected to the end of the circuit board facing the lower opening through multiple wires. The side wall of the mounting groove is recessed in the radial direction of the cylinder to form multiple wire grooves, and the length direction of the wire grooves is consistent with the length direction of the cylinder.

7. The audio acquisition module for pipeline leakage monitoring according to claim 1, characterized in that: The lower bottom cover includes a concentrically arranged mounting seat and a sealing cover, one end of the mounting seat is used to abut against the outer wall surface of the pipeline to be tested, the other end of the mounting seat is connected to the bottom surface of the sealing cover, the top surface of the sealing cover extends away from the mounting seat, and the sealing cover is used to close the lower end opening of the cylinder.

8. The audio acquisition module for pipeline leakage monitoring according to claim 7 is characterized in that: The cylinder comprises an outer shell layer and an inner shell layer which are arranged concentrically, wherein a vacuum space is formed between the outer shell layer and the inner shell layer, and a sealing ring is arranged around the side wall surface of the sealing cover, and the sealing ring is arranged concentrically with the lower bottom cover.

9. The audio acquisition module for pipeline leakage monitoring according to claim 1, characterized in that: It also includes a fixing ring, which includes a first arc-shaped fixing plate and a second arc-shaped fixing plate that are arranged in a mirror image. The lower end of the cylinder is provided with a first connecting structure and a second connecting structure. The upper end of the first arc-shaped fixing plate is rotatably connected to the first connecting structure, and the upper end of the second arc-shaped fixing plate is rotatably connected to the second connecting structure. The first arc-shaped fixing plate and the second arc-shaped fixing plate are used to approach each other to clamp on the outer wall surface of the pipeline, and the first arc-shaped fixing plate and the second arc-shaped fixing plate are used to move away from each other to detach from the pipeline.

10. The audio acquisition module for pipeline leakage monitoring according to claim 1, characterized in that: A force-bearing structure is formed at the upper end of the support rod, and the force-bearing structure includes a connecting ring and a force-bearing plate. The inner wall surface of the connecting ring surrounds the outer wall surface of the upper end of the support rod, one end of the force-bearing plate is connected to the outer wall surface of the connecting ring, and the other end of the force-bearing plate extends away from the connecting ring along the radial direction of the cylinder.

Images