CN114034458A - Impact load detection device of steel wire rope head connecting piece - Google Patents
Impact load detection device of steel wire rope head connecting piece Download PDFInfo
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- CN114034458A CN114034458A CN202210021955.XA CN202210021955A CN114034458A CN 114034458 A CN114034458 A CN 114034458A CN 202210021955 A CN202210021955 A CN 202210021955A CN 114034458 A CN114034458 A CN 114034458A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
Abstract
The invention discloses an impact load detection device of a steel wire rope head connecting piece, which relates to the field of elevator accessory detection and comprises a base, wherein the base is fixedly connected with a damping mechanism, the damping mechanism is fixedly connected with a mounting plate, the mounting plate is fixedly connected with a moving mechanism, the moving mechanism is fixedly connected with a height adjusting mechanism, the height adjusting mechanism is fixedly connected with a lever mechanism, a tension sensor is fixedly connected onto the mounting plate, the tension sensor and the lever mechanism are both fixedly connected with connecting mechanisms, the mounting plate is fixedly connected with the lever fixing mechanism, the mounting plate is fixedly connected with an impact mechanism, and the impact mechanism is fixedly connected with a limiting block mechanism. The efficiency of wire rope head connecting piece impact load detection has been increased, the function of device has been richened in addition.
Description
Technical Field
The invention relates to the field of elevator accessory detection, in particular to an impact load detection device of a steel wire rope head connecting piece.
Background
An elevator refers to a permanent transportation device serving inside a building to achieve a rigid orbital motion perpendicular to the horizontal or inclined at an angle less than 15 ° to the vertical. The common elevators are step elevators and vertical lift elevators, and the importance of the wire rope head connecting piece as a basic component for ensuring the safe operation of the elevator is also self-evident.
In the prior art, the high-position heavy hammer free falling body is adopted to impact the steel wire rope, so that the strong impact intensity is realized, including larger mass and speed; the pre-tightening of the steel wire rope under different loads is realized by adopting the screw lead screw, and the tensile supporting strength of the steel wire rope is ensured by using the two pairs of tapered roller bearings; the matching of the electric hoist and the trigger ensures that the drop hammer impact has instantaneity and controllability and ensures the rapidness and the safety of the operation; the lead screw and the worm gear with self-locking function are adopted, so that quick loading and pretightening force maintenance are realized; the dynamic response of the steel wire rope is tested by adopting a comprehensive method of a tension sensor, a multi-point acceleration sensor and high-speed camera shooting, so that the real-time accurate detection and analysis of the dynamic response process of tension vibration after the steel wire rope is ejected by impact are realized, but the connecting piece parts with different lengths cannot be detected in the prior art, and meanwhile, the impact force cannot be rapidly changed in the prior art, so that the impact load detection is not wide in application, and the prior art has a larger improvement space.
Disclosure of Invention
The invention provides an impact load detection device of a steel wire rope head connecting piece, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an impact load detection device of wire rope head connecting piece, includes the base, base fixed connection damper, damper fixed connection mounting panel, mounting panel fixed connection moving mechanism, moving mechanism fixed connection height adjusting mechanism, height adjusting mechanism fixed connection lever mechanism, fixed connection force sensor on the mounting panel, equal fixed connection coupling mechanism on force sensor and the lever mechanism, mounting panel fixed connection lever fixed connection mechanism, mounting panel fixed connection impact mechanism, impact mechanism fixed connection stopper mechanism.
As a preferred technical scheme of the invention, the damping mechanism comprises a sliding rod seat fixed on a base, the sliding rod seat is fixedly connected with a sliding rod, the sliding rod is connected with two damping blocks in a sliding manner, a first spring is fixedly connected between the damping blocks and the sliding rod seat, the damping blocks are fixedly connected with a first rotating seat, the first rotating seat is rotatably connected with a damping rod, one end, far away from the first rotating seat, of the damping rod is rotatably connected with a second rotating seat, and the second rotating seat is fixedly connected with an installation plate.
As a preferred technical scheme of the invention, the moving mechanism comprises a first fixed seat and a second fixed seat which are fixed on a mounting plate, the first fixed seat is rotatably connected with a first threaded rod, the second fixed seat is fixedly connected with a moving rod, the mounting plate is fixedly connected with a motor support, the motor support is fixedly connected with a motor, an output shaft of the motor is coaxially and fixedly connected with the first threaded rod, the first threaded rod is in threaded connection with the moving frame, and the moving frame is in sliding connection with the moving rod.
As a preferable technical scheme, the height adjusting mechanism comprises a second threaded rod rotatably connected with the moving frame, one end of the second threaded rod, far away from the moving frame, is fixedly connected with the height adjusting handle, the second threaded rod is in threaded connection with a first lifting plate, the first lifting plate is fixedly connected with a connecting rod, the connecting rod penetrates through the moving frame and is in sliding connection with the moving frame, and one end of the connecting rod, far away from the first lifting plate, is fixedly connected with the second lifting plate.
As a preferable technical scheme of the invention, the lever mechanism comprises a third rotating seat fixed on the second lifting plate, the third rotating seat is rotatably connected with a first lever sleeve, and the first lever sleeve is slidably connected with the lever.
As a preferable technical scheme of the invention, the connecting mechanism comprises a connecting frame, and the connecting frame is in threaded connection with a connecting bolt.
As a preferable technical scheme, the lever fixing mechanism comprises a fourth rotating seat fixed on the mounting plate, the fourth rotating seat is rotatably connected with a rotating block, the rotating block is fixedly connected with a hard spring, one end, far away from the rotating block, of the hard spring is fixedly connected with a second lever sleeve, the second lever sleeve is made of a magnetic material, and the lever is made of an iron material.
As a preferable technical scheme of the invention, the impact mechanism comprises a first limiting rod fixed on the mounting plate, one end of the first limiting rod, which is far away from the mounting plate, is fixedly connected with the top plate, the first limiting rod is connected with the impact plate in a sliding manner, the side edge of the impact plate is fixedly connected with a counterweight rod, the counterweight rod is provided with a counterweight, the impact plate is fixedly connected with a clamping plate, the clamping plate penetrates through the top plate and is connected with the top plate in a sliding manner, one end of the clamping plate, which is far away from the impact plate, is fixedly connected with a pull ring, and a second spring is fixedly connected between the top plate and the impact plate.
According to a preferred technical scheme, the limiting block mechanism comprises a spring fixing plate fixed on the top plate, one side, away from the clamping plate, of the spring fixing plate is fixedly connected with a third spring, one end, away from the spring fixing plate, of the third spring is fixedly connected with a limiting plate, the limiting plate is fixedly connected with a second limiting rod, the second limiting rod penetrates through the spring fixing plate and is in sliding connection with the spring fixing plate, and one end, away from the limiting plate, of the second limiting rod is fixedly connected with a limiting block.
The invention has the following advantages: according to the invention, the shock generated by the test can be cushioned in the test process by arranging the damping mechanism, the equipment is prevented from being damaged, the fulcrum position of the lever mechanism can be changed by arranging the moving mechanism, the impact force can be changed, the height adjusting mechanism can adapt to the detection of connecting pieces with different lengths, the connecting pieces with different sizes can be stably installed by arranging the connecting mechanism, the lever mechanism can be limited and accommodated when the device is not used by arranging the lever fixing mechanism, the impact mechanism can be limited by arranging the limit block mechanism, the impact counterweight can be adjusted by combining the impact mechanism, the efficiency of the detection of the impact load of the connecting piece at the end of the steel wire rope is increased, and in addition, the functions of the device are enriched.
Drawings
Fig. 1 is a schematic structural view of an impact load detection device of a wire rope head connecting piece.
Fig. 2 is a structural schematic diagram of the impact load detection device of the wire rope head connecting piece at a second view angle.
Fig. 3 is a structural diagram of the impact load detection device of the wire rope head connecting piece from a third view angle.
Fig. 4 is a structural diagram of the impact load detection device of the wire rope head connecting piece from a fourth view angle.
Fig. 5 is a front view of an impact load detecting device of the wire rope head attachment.
Fig. 6 is a side view of an impact load detecting device of the wire rope head attachment.
Fig. 7 is a plan view of an impact load detection device of the wire rope head attachment.
In the figure: 1. a base; 2. a damping mechanism; 201. a slide bar seat; 202. a slide bar; 203. a damping block; 204. a first spring; 205. a first rotating base; 206. a shock-absorbing lever; 207. a second rotating base; 3. mounting a plate; 4. a moving mechanism; 401. a first fixed seat; 402. a second fixed seat; 403. a first threaded rod; 404. a travel bar; 405. a motor bracket; 406. a motor; 407. a movable frame; 5. a height adjustment mechanism; 501. a second threaded rod; 502. a height adjustment handle; 503. a first lifter plate; 504. a connecting rod; 505. a second lifter plate; 6. a lever mechanism; 601. a third rotating base; 602. a first lever sleeve; 603. a lever; 7. a tension sensor; 8. a connecting mechanism; 801. a connecting frame; 802. a connecting bolt; 9. a lever fixing mechanism; 901. a fourth rotating base; 902. rotating the block; 903. a hard spring; 904. a second lever sleeve; 10. an impact mechanism; 1001. a first limit rod; 1002. a top plate; 1003. an impact plate; 1004. a weight lever; 1005. balancing weight; 1006. clamping a plate; 1007. a pull ring; 1008. a second spring; 11. a stopper mechanism; 1101. a spring fixing plate; 1102. a third spring; 1103. a limiting plate; 1104. a second limiting rod; 1105. and a limiting block.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-7, an impact load detection device for a steel wire rope head connecting piece comprises a base 1, wherein the base 1 is fixedly connected with a damping mechanism 2, the damping mechanism 2 is fixedly connected with a mounting plate 3, the mounting plate 3 is fixedly connected with a moving mechanism 4, the moving mechanism 4 is fixedly connected with a height adjusting mechanism 5, the height adjusting mechanism 5 is fixedly connected with a lever mechanism 6, the mounting plate 3 is fixedly connected with a tension sensor 7, the tension sensor 7 and the lever mechanism 6 are fixedly connected with a connecting mechanism 8, the mounting plate 3 is fixedly connected with a lever fixing mechanism 9, the mounting plate 3 is fixedly connected with an impact mechanism 10, and the impact mechanism 10 is fixedly connected with a limiting block mechanism 11.
The damping mechanism 2 comprises a sliding rod seat 201 fixed on the base 1, the sliding rod seat 201 is fixedly connected with a sliding rod 202, the sliding rod 202 is connected with two damping blocks 203 in a sliding mode, a first spring 204 is fixedly connected between each damping block 203 and the corresponding sliding rod seat 201, each damping block 203 is fixedly connected with a first rotating seat 205, each first rotating seat 205 is rotatably connected with a damping rod 206, one end, far away from the corresponding first rotating seat 205, of each damping rod 206 is rotatably connected with a second rotating seat 207, and each second rotating seat 207 is fixedly connected with the mounting plate 3.
The moving mechanism 4 comprises a first fixed seat 401 and a second fixed seat 402 which are fixed on the mounting plate 3, the first fixed seat 401 is rotatably connected with a first threaded rod 403, the second fixed seat 402 is fixedly connected with a moving rod 404, the mounting plate 3 is fixedly connected with a motor support 405, the motor support 405 is fixedly connected with a motor 406, an output shaft of the motor 406 is coaxially and fixedly connected with the first threaded rod 403, the first threaded rod 403 is in threaded connection with a moving frame 407, and the moving frame 407 is in sliding connection with the moving rod 404.
Specifically, when the motor 406 is turned on, the output shaft of the motor 406 rotates to drive the first threaded rod 403 to rotate, so that the movable frame 407 moves axially along the movable rod 404.
The height adjusting mechanism 5 comprises a second threaded rod 501 rotatably connected with the movable frame 407, one end of the second threaded rod 501, far away from the movable frame 407, is fixedly connected with a height adjusting handle 502, the second threaded rod 501 is in threaded connection with a first lifting plate 503, the first lifting plate 503 is fixedly connected with a connecting rod 504, the connecting rod 504 penetrates through the movable frame 407 and is in sliding connection with the movable frame 407, and one end of the connecting rod 504, far away from the first lifting plate 503, is fixedly connected with a second lifting plate 505.
Specifically, the height adjustment handle 502 is rotated, and the rotation of the height adjustment handle 502 drives the second threaded rod 501 to rotate, so that the first lifting plate 503 is lifted, and the second lifting plate 505 is lifted and lowered under the driving of the connecting rod 504, so as to change the height of the lever mechanism 6.
The lever mechanism 6 includes a third rotating base 601 fixed on the second lifting plate 505, the third rotating base 601 is rotatably connected to a first lever sleeve 602, and the first lever sleeve 602 is slidably connected to the lever 603.
The connecting mechanism 8 comprises a connecting frame 801, and the connecting frame 801 is in threaded connection with a connecting bolt 802.
The impact mechanism 10 comprises a first limiting rod 1001 fixed on the mounting plate 3, one end of the first limiting rod 1001 far away from the mounting plate 3 is fixedly connected with a top plate 1002, the first limiting rod 1001 is connected with an impact plate 1003 in a sliding mode, the side of the impact plate 1003 is fixedly connected with a counterweight rod 1004, a counterweight 1005 is arranged on the counterweight rod 1004, the impact plate 1003 is fixedly connected with a clamping plate 1006, the clamping plate 1006 penetrates through the top plate 1002 and is connected with the top plate 1002 in a sliding mode, one end of the clamping plate 1006 far away from the impact plate 1003 is fixedly connected with a pull ring 1007, and a second spring 1008 is fixedly connected between the top plate 1002 and the impact plate 1003.
The limiting block mechanism 11 includes a spring fixing plate 1101 fixed on the top plate 1002, one side of the spring fixing plate 1101 far away from the clamping plate 1006 is fixedly connected with a third spring 1102, one end of the third spring 1102 far away from the spring fixing plate 1101 is fixedly connected with a limiting plate 1103, the limiting plate 1103 is fixedly connected with a second limiting rod 1104, the second limiting rod 1104 penetrates through the spring fixing plate 1101 and is slidably connected with the spring fixing plate 1101, and one end of the second limiting rod 1104 far away from the limiting plate 1103 is fixedly connected with a limiting block 1105.
Specifically, when the limiting plate 1103 is pulled, the third spring 1102 elongates, and at this time, under the action of the second limiting rod 1104, the limiting block 1105 is no longer clamped on the clamping plate 1006, and at this time, under the action of the second spring 1008, the striking plate 1003 strikes on the lever mechanism 6.
Example 2
Referring to fig. 1 to 7, the other contents of the present embodiment are the same as embodiment 1, except that: the lever fixing mechanism 9 comprises a fourth rotating seat 901 fixed on the mounting plate 3, the fourth rotating seat 901 is rotatably connected with a rotating block 902, the rotating block 902 is fixedly connected with a hard spring 903, one end, far away from the rotating block 902, of the hard spring 903 is fixedly connected with a second lever sleeve 904, the second lever sleeve 904 is made of a magnetic material, and the lever 603 is made of a ferrous material.
In the implementation process of the invention, firstly, the height adjusting mechanism 5 is adjusted according to the length of the connecting piece, so that the height of the lever mechanism 6 is adjusted, then the connecting piece is installed in the connecting mechanism 8, at the moment, the moving mechanism 4 can be opened if the impact force needs to be changed, the fulcrum of the lever mechanism 6 is adjusted, or the counterweight of the impact mechanism 10 is adjusted, then the lever fixing mechanism 9 is removed, at the moment, the contact limiting block mechanism 11 limits the impact mechanism 10, at the moment, the impact mechanism 10 impacts the lever mechanism 6, the impact is transmitted to the connecting piece through the lever mechanism 6, and then the stress condition of the connecting piece can be analyzed through the tension sensor 7.
According to the invention, the shock absorption mechanism 2 can be used for buffering the shock generated by the test in the test process, so that the equipment is prevented from being damaged, the position of the fulcrum of the lever mechanism 6 can be changed by arranging the moving mechanism 4, the impact force can be changed, the height adjusting mechanism 5 can be suitable for detecting connecting pieces with different lengths, the connecting pieces with different sizes can be stably installed by arranging the connecting mechanism 8, the lever mechanism 6 can be limited and stored when not in use by arranging the lever fixing mechanism 9, the impact mechanism 10 can be limited by arranging the limiting block mechanism 11, the impact counter weight can be adjusted by combining the impact mechanism 10, the efficiency of detecting the impact load of the steel wire rope end connecting piece is increased, and the functions of the device are enriched.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The impact load detection device of the steel wire rope head connecting piece is characterized by comprising a base (1), wherein the base (1) is fixedly connected with a damping mechanism (2), the damping mechanism (2) is fixedly connected with a mounting plate (3), the mounting plate (3) is fixedly connected with a moving mechanism (4), the moving mechanism (4) is fixedly connected with a height adjusting mechanism (5), the height adjusting mechanism (5) is fixedly connected with a lever mechanism (6), the mounting plate (3) is fixedly connected with a tension sensor (7), the tension sensor (7) and the lever mechanism (6) are both fixedly connected with connecting mechanisms (8), the mounting plate (3) is fixedly connected with a lever fixing mechanism (9), the mounting plate (3) is fixedly connected with an impact mechanism (10), and the impact mechanism (10) is fixedly connected with a limiting block mechanism (11);
the moving mechanism (4) comprises a first fixed seat (401) and a second fixed seat (402) which are fixed on the mounting plate (3), the first fixed seat (401) is rotatably connected with a first threaded rod (403), the second fixed seat (402) is fixedly connected with a moving rod (404), the mounting plate (3) is fixedly connected with a motor support (405), the motor support (405) is fixedly connected with a motor (406), an output shaft of the motor (406) is coaxially and fixedly connected with the first threaded rod (403), the first threaded rod (403) is in threaded connection with a moving frame (407), and the moving frame (407) is in sliding connection with the moving rod (404);
the height adjusting mechanism (5) comprises a second threaded rod (501) rotatably connected with the moving frame (407), one end, far away from the moving frame (407), of the second threaded rod (501) is fixedly connected with a height adjusting handle (502), the second threaded rod (501) is in threaded connection with a first lifting plate (503), the first lifting plate (503) is fixedly connected with a connecting rod (504), the connecting rod (504) penetrates through the moving frame (407) and is in sliding connection with the moving frame (407), and one end, far away from the first lifting plate (503), of the connecting rod (504) is fixedly connected with a second lifting plate (505);
the lever mechanism (6) comprises a third rotating seat (601) fixed on the second lifting plate (505), the third rotating seat (601) is rotatably connected with a first lever sleeve (602), and the first lever sleeve (602) is slidably connected with the lever (603).
2. The impact load detection device of the steel wire rope head connecting piece according to claim 1, characterized in that the shock absorption mechanism (2) comprises a slide bar seat (201) fixed on the base (1), the slide bar seat (201) is fixedly connected with a slide bar (202), the slide bar (202) is connected with two damping blocks (203) in a sliding way, a first spring (204) is fixedly connected between the damping blocks (203) and the slide bar seat (201), the damping blocks (203) are fixedly connected with a first rotating seat (205), the first rotating seat (205) is connected with a shock absorption rod (206) in a rotating way, one end, far away from the first rotating seat (205), of the shock absorption rod (206) is connected with a second rotating seat (207) in a rotating way, and the second rotating seat (207) is fixedly connected with the mounting plate (3).
3. The apparatus for detecting an impact load on a wire rope head attachment according to claim 1, wherein the attachment mechanism (8) includes an attachment bracket (801), and the attachment bracket (801) is screwed with the attachment bolt (802).
4. The impact load detection device of the steel wire rope head connecting piece according to claim 1, characterized in that the lever fixing mechanism (9) comprises a fourth rotating seat (901) fixed on the mounting plate (3), the fourth rotating seat (901) is rotatably connected with a rotating block (902), the rotating block (902) is fixedly connected with a hard spring (903), one end of the hard spring (903) far away from the rotating block (902) is fixedly connected with a second lever sleeve (904), the second lever sleeve (904) is made of a magnetic material, and the lever (603) is made of a ferrous material.
5. The steel wire rope head connecting piece impact load detection device according to claim 1, wherein the impact mechanism (10) comprises a first limiting rod (1001) fixed on the mounting plate (3), one end of the first limiting rod (1001) far away from the mounting plate (3) is fixedly connected with a top plate (1002), the first limiting rod (1001) is slidably connected with an impact plate (1003), the side edge of the impact plate (1003) is fixedly connected with a balance weight rod (1004), a balance weight (1005) is arranged on the balance weight rod (1004), the impact plate (1003) is fixedly connected with a clamping plate (1006), the clamping plate (1006) penetrates through the top plate (1002) and is slidably connected with the top plate (1002), one end of the clamping plate (1006) far away from the impact plate (1003) is fixedly connected with a pull ring (1007), and a second spring (1008) is fixedly connected between the top plate (1002) and the impact plate (1003).
6. The impact load detection device of the wire rope head connecting piece according to claim 5, wherein the stopper mechanism (11) comprises a spring fixing plate (1101) fixed on the top plate (1002), one side of the spring fixing plate (1101) far away from the clamping plate (1006) is fixedly connected with a third spring (1102), one end of the third spring (1102) far away from the spring fixing plate (1101) is fixedly connected with a limiting plate (1103), the limiting plate (1103) is fixedly connected with a second stopper rod (1104), the second stopper rod (1104) penetrates through the spring fixing plate (1101) and is slidably connected with the spring fixing plate (1101), and one end of the second stopper rod (1104) far away from the limiting plate (1103) is fixedly connected with the stopper (1105).
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| CN202210021955.XA CN114034458B (en) | 2022-01-10 | 2022-01-10 | Impact load detection device of steel wire rope head connecting piece |
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| CN202210021955.XA CN114034458B (en) | 2022-01-10 | 2022-01-10 | Impact load detection device of steel wire rope head connecting piece |
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|---|---|---|---|---|
| CN114526881A (en) * | 2022-04-24 | 2022-05-24 | 江苏铧迈新材料科技有限公司 | LVT floor elasticity detection device |
| CN114526881B (en) * | 2022-04-24 | 2022-07-12 | 江苏铧迈新材料科技有限公司 | LVT floor elasticity detection device |
| CN117191326A (en) * | 2023-11-03 | 2023-12-08 | 江苏信泰化工装备有限公司 | Pressure vessel sealing performance detection equipment |
| CN117191326B (en) * | 2023-11-03 | 2024-01-26 | 江苏信泰化工装备有限公司 | Pressure vessel sealing performance detection equipment |
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| CN114034458B (en) | 2022-03-11 |
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