Clamping mechanism for checking safety valve

Abstract

The invention discloses a clamping mechanism for safety valve verification, and relates to the technical field of clamping mechanisms. The device comprises a base, an arm rod is installed on the base, the device further comprises an installation frame, the installation frame is installed at the free end of the arm rod, a hydraulic rod is installed on the installation frame, a sliding rod in sliding fit with the installation frame is installed at the output end of the hydraulic rod, and clamping plates are symmetrically installed on the installation frame in a sliding mode. When the safety valve clamping device is used, a sliding rod is pushed through a hydraulic rod, an abutting block abuts against an inclined block, then a clamping plate clamps a safety valve, then the sliding rod slides, a pocket plate shields the clamping plate, due to the fact that the arc-shaped face of the clamping plate is collinear with the axis of the safety valve in the clamping process, the pocket plate shields the safety valve in the axis direction, and the safety valve is clamped. And the base plate is moved to be located below the safety valve for shielding, so that the possibility of falling of the safety valve is reduced, and the safety of the safety valve during transportation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of clamping mechanisms, and in particular to a clamping mechanism for calibrating a safety valve. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external forces. When the medium pressure in the equipment or pipeline exceeds the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. However, the safety valve needs to undergo pressure testing before it can be used. The safety valve needs to be transported to a calibration bench for calibration;

[0003] In the prior art, when clamping a safety valve, due to structural problems of the safety valve, its closing structure needs to be kept in the vertical direction, so it is often placed vertically and then clamped by an electric hoist or a robotic arm. However, in the prior art, there are also horizontal safety valves, such as CN111173938B, which provides a horizontal two-way sealed pilot safety valve, the shape of which is similar to the existing safety valve adjusted to the horizontal direction, but the closing structure is still in the vertical direction, and the existing clamps are mostly specialized in the shape of clamping safety valves located in the vertical direction. When clamping this type of horizontal safety valve, the clamping stability of the existing clamp will be greatly reduced, causing the safety valve to easily fall when being clamped.

[0004] Therefore, the present invention proposes a clamping mechanism for safety valve calibration to improve this problem. Summary of the Invention

[0005] The purpose of this application is to solve the problems in the above-mentioned background technology, and to provide a clamping mechanism for safety valve calibration.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A clamping mechanism for checking a safety valve comprises a base on which an arm is mounted, and further comprises:

[0008] The mounting frame is mounted on the free end of the arm, a hydraulic rod is mounted on the mounting frame, a sliding rod that slides with the mounting frame is mounted on the output end of the hydraulic rod, a clamping plate is symmetrically mounted on the mounting frame for sliding, a connecting spring is installed between the clamping plate and the mounting frame, the inner wall of the clamping plate is an arc-shaped surface, a conflicting block is mounted on the sliding rod, and an inclined block is mounted on the clamping plate, and when the conflicting block conflicts with the inclined block, the two clamping plates are forced to move closer to each other;

[0009] A secondary clamp is mounted on the mounting frame, the secondary clamp comprising a slide bar symmetrically slidably mounted on the mounting frame, a pocket plate is mounted on the slide bar, and the pocket plate is used to block the space between the clamps along the axial direction of the curved surface of the clamps;

[0010] The backing plate is movably installed on the pocket plate, and the backing plate is used to block the side of the space between the splints facing the ground.

[0011] Further, the splint includes a connecting rod slidably installed on the mounting frame. A contact plate is slidably installed on the connecting rod through a pulling spring. A guide rod penetrating the connecting rod is installed on the contact plate, and the pulling spring is sleeved outside the guide rod.

[0012] Further, a return spring is installed between the sliding rods. A connecting plate is installed on the side wall of the abutting block. A sliding column is installed on the connecting plate. A sliding cylinder is installed on the mounting frame. The sliding cylinder is slidably connected with the sliding column. A hinged rod is hinged on the side wall of the sliding cylinder. The free end of the hinged rod is slidably hinged with the sliding rod. The free end of the sliding column penetrates the sliding cylinder and is installed with a resisting plate, and the resisting plate is used to resist the hinged rod.

[0013] Further, a connecting rope is installed on one side of the backing plate, and the free end of the connecting rope is connected with the connecting plate.

[0014] Further, a circular groove and a long groove that communicate with each other are formed on the pocket plate. A plug rod is installed on the backing plate. When the plug rod is inserted into the circular groove, the plug rod is movably matched with the circular groove. When the plug rod is inserted into the long groove, the plug rod is slidably matched with the long groove. A collar is slidably installed on the pocket plate through an auxiliary spring, and the collar is rotatably matched with the plug rod.

[0015] Further, a sliding groove slidably matched with the sliding rod is formed on the mounting frame. An elastic piece is installed on the connecting plate. The side wall of the elastic piece is an arc surface. When the connecting plate approaches the mounting frame, one side of the elastic piece contacts the inner wall of the sliding groove, and the other side contacts the sliding rod.

[0016] Further, a resisting rod is installed on the pocket plate on the side away from the connecting rope, and a baffle is rotatably installed on the pocket plate on the side close to the connecting rope through a torsion spring. When the resisting rod resists the baffle, the baffle rotates to resist the backing plate.

[0017] Further, an auxiliary frame is installed on the mounting frame. A driving rod is rotatably installed on the auxiliary frame through a torsion spring. An extension rod is installed on the driving rod. A pressing plate is hinged on the free end of the extension rod. [[ID=,23]]

[0018] Further, a protruding plate is installed on one side of the pocket plate, and a notch for accommodating the protruding plate is formed on the other side of the pocket plate.

[0019] Further, a plurality of rollers are rotatably installed on the side of the backing plate facing the splint.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. When in use, the present application pushes the sliding rod through the hydraulic rod, so that the interference block interferes with the inclined block, and then the clamping plate clamps the safety valve, and then the sliding rod is slid so that the pocket plate blocks the clamping plate. Since the curved surface of the clamping plate is collinear with the axis of the safety valve when clamping, the pocket plate blocks the axis direction of the safety valve, and then the movable pad is located below the safety valve to block it, thereby reducing the possibility of the safety valve falling and increasing the safety of the safety valve during transportation.

[0022] 2. The pulling spring of the present application forces the contact plate to move away from the connecting rod. When the clamping plate clamps the safety valve, the safety valve contacts the contact plate, causing it to approach the connecting rod. At this time, the pulling spring is stretched, causing the pulling spring to exert a force on the contact plate to contact the safety valve, making the contact plate fit more closely to the surface of the safety valve, thereby reducing the gap between the two and further improving the clamping effect of the device.

[0023] 3. When the present application is in use, when the connecting plate approaches the mounting frame along with the interference block, the sliding column falls, causing the interference plate to slide in the direction away from the hinged rod, thereby releasing the interference with the hinged rod. At this time, the return spring pulls the two sliding rods closer to each other, causing the pocket plate to cover the safety valve. When the safety valve needs to be released, the sliding rod slides upward, causing the interference block to drive the connecting plate away from the mounting frame. At this time, the sliding column pulls the interference block to interfere with the hinged rod, causing the free ends of the hinged rod to move away from each other, thereby causing the sliding rods to move away from each other, causing the pocket plate to release the blocking of the safety valve, thereby facilitating the unloading of the safety valve.

[0024] 4. When the present application is in use, when the connecting plate is close to the mounting frame, the connecting rope is loosened, and the pad rotates downward due to the action of gravity to a position that blocks the safety valve. When the connecting plate is away from the mounting frame, the connecting rope is gradually pulled and tightened, thereby pulling the pad to rotate, thereby releasing the blockage of the safety valve and facilitating unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a solid diagram of the three-dimensional structure of this application;

[0026] Figure 2 This is a schematic diagram of the structure on the mounting frame of this application;

[0027] Figure 3 It is an exploded view of part of the structure of this application;

[0028] Figure 4 It is a schematic diagram of the splint and splint structure of the present application;

[0029] Figure 5 It is a schematic diagram of the structure of the auxiliary fixture of this application;

[0030] Figure 6 This is an exploded view of the pad structure of this application;

[0031] Figure 7 It is an exploded view of the shoe plate structure of this application;

[0032] Figure 8 It is a usage diagram of the upper structure of the auxiliary frame of this application;

[0033] Figure 9 It is a schematic diagram of the connecting plate structure of this application;

[0034] Figure 10 It is a schematic diagram of the upper structure of the backing plate of this application;

[0035] Reference numerals: 1, base; 101, arm rod; 2, mounting bracket; 201, hydraulic rod; 202, sliding rod;

[0036] 203, clamping plate; 2031, connecting rod; 2032, pulling spring; 2033, contact plate; 2034, guide rod;

[0037] 204, abutting block; 205, inclined block; 206, connecting spring; 3, sub-jig; 301, sliding rod; 302, shoe plate; 303, connecting plate; 304, sliding column; 305, sliding cylinder; 306, articulated rod; 307, abutting plate; 308, return spring; 4, backing plate; 401, connecting rope; 402, circular groove; 403, long groove; 404, inserting rod; 405, auxiliary spring; 406, collar; 5, elastic sheet; 6, sliding groove; 7, abutting rod; 8, baffle; 9, auxiliary frame; 10, driving rod; 11, extension rod; 12, pressing plate; 13, protruding plate; 14, notch; 15, roller. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application.

[0039] Embodiment 1

[0040] As Figure 1 - Figure 10 shown, a clamping mechanism for safety valve calibration proposed in Embodiment 1 of this application includes a base 1, on which an arm rod 101 is installed. The arm rod 101 is a prior art and is consistent with the principle of a robotic arm. There are multiple arm rods 101, which are connected through robotic arm joints. The base 1 is used to support the entire device, and an end effector for controlling the arm rod 101 is installed thereon. It further includes:

[0041] A mounting bracket 2, which is installed on the free end of the arm rod 101. A hydraulic rod 201 is installed on the mounting bracket 2, and a sliding rod 202 that is slidably engaged with the mounting bracket 2 is installed on the output end of the hydraulic rod 201, so as to Figure 1From the main perspective, the output end of the hydraulic rod 201 is extended and retracted in the vertical direction;

[0042] A clamping plate 203 is symmetrically and slidably mounted on the mounting frame 2, a connecting spring 206 is installed between the clamping plate 203 and the mounting frame 2, the inner wall of the clamping plate 203 is an arc-shaped surface, a resisting block 204 is installed on the sliding rod 202, and an inclined block 205 is installed on the clamping plate 203. When the resisting block 204 resists the inclined block 205, the two clamping plates 203 are forced to move closer to each other. Both the resisting block 204 and the inclined block 205 have inclined surfaces, and the inclined surfaces on the two are parallel to each other;

[0043] When the safety valve needs to be clamped, the hydraulic rod 201 pulls the sliding rod 202 upward to make the resistance block 204 release the resistance to the oblique block 205, and the two clamping plates 203 are pulled away from each other by the reset of the connecting spring 206, so that the device releases the clamping of the safety valve, which is convenient for unloading.

[0044] The auxiliary clamp 3 is mounted on the mounting frame 2. The auxiliary clamp 3 includes a slide bar 301 symmetrically slidably mounted on the mounting frame 2. A pocket plate 302 is mounted on the slide bar 301. The pocket plate 302 is used to block the space between the clamps 203 along the axial direction of the curved surface of the clamps 203. The pocket plate 302 includes two integrally constructed plates, one of which is curved and the other is flat. The axis of the curved plate is collinear with the axis of the clamps 203. The curved plate can cooperate with the clamps 203 to clamp the safety valve, thereby increasing the contact area between the device and the safety valve, thereby increasing the clamping effect of the device. The flat plate is used to block the safety valve, and its shape is as follows: Figure 5 As shown, when the clamping plate 203 clamps the safety valve, the sliding rod 301 is slid to make the pocket plate 302 cover the safety valve, further reducing the movable space of the safety valve on the device, thereby reducing the possibility of the safety valve falling off the device and increasing the practicality of the device.

[0045] The backing plate 4 is movably mounted on the pocket plate 302. The backing plate 4 is used to block the side of the space between the clamping plates 203 facing the ground. During transportation, the backing plate 4 is located at the bottom of the safety valve. During use, if an accident occurs in the device and causes the safety valve to separate from the clamping plates 203 and fall, the backing plate 4 will support the safety valve, reducing the possibility of the safety valve falling directly to the ground, thereby further protecting the safety valve.

[0046] Compared with the prior art, during use, the hydraulic rod 201 pushes the sliding rod 202, so that the interference block 204 interferes with the inclined block 205, and then the clamping plate 203 clamps the safety valve, and then the sliding rod 301 is slid, so that the pocket plate 302 blocks the clamping plate 203. Since the curved surface of the clamping plate 203 is collinear with the axis of the safety valve when clamping, the pocket plate 302 blocks the axial direction of the safety valve, and then the movable pad 4 is located below the safety valve to block it, reducing the possibility of the safety valve falling and increasing the safety of the safety valve during transportation.

[0047] Example 2

[0048] like Figure 4 As shown, the second embodiment further discloses the mounting frame 2, the auxiliary clamp 3 and the pad 4 on the basis of the first embodiment. In the second embodiment, the clamping plate 203 includes a connecting rod 2031 slidably mounted on the mounting frame 2, and a contact plate 2033 is slidably mounted on the connecting rod 2031 by pulling a spring 2032. A groove body penetrating the mounting frame 2 is provided on the mounting frame 2, and the connecting rod 2031 is slidably mounted in the groove body. The contact plate 2033 contacts the safety valve and is used to clamp the safety valve. The contact plate 2033 is made of rubber wrapped around the outside of a steel plate. The rubber contacts the safety valve, thereby increasing the friction between the two, increasing the stability during clamping, and reducing the damage to the safety valve caused by the flexible clamping process, thereby increasing the practicality of the device.

[0049] The contact plate 2033 is provided with a guide rod 2034 that passes through the connecting rod 2031. The pull spring 2032 is sleeved on the outside of the guide rod 2034. When in use, the guide rod 2034 passes through the connecting rod 2031, forming a channel on the connecting rod 2031. The inner wall of the channel blocks the side wall of the guide rod 2034, so that the contact plate 2033 can only approach or move away from the connecting rod 2031 in a straight line. In addition, the guide rod 2034 blocks the inner ring of the pull spring 2032, so that when the pull spring 2032 is deformed, it can only elastically deform along its axial direction, thereby increasing the stability of the pull spring 2032 during deformation.

[0050] Pulling the pulling spring 2032 forces the contact plate 2033 away from the connecting rod 2031. When the clamping plate 203 clamps the safety valve, the safety valve abuts against the contact plate 2033, causing it to approach the connecting rod 2031. At this time, the pulling spring 2032 is stretched, so that the pulling spring 2032 generates a force against the contact plate 2033 that abuts against the safety valve, making the contact plate 2033 fit more closely to the surface of the safety valve, thereby reducing the gap between the two and further improving the clamping effect of the device.

[0051] As Figure 5 shown, in the second embodiment, a return spring 308 is installed between the sliding rods 301, and the return spring 308 forces the two sliding rods 301 to approach each other;

[0052] A connecting plate 303 is installed on the side wall of the abutting block 204, so that when the abutting block 204 slides towards the mounting bracket 2, the connecting plate 303 is also driven to approach the mounting bracket 2;

[0053] A sliding column 304 is installed on the connecting plate 303, a sliding cylinder 305 is installed on the mounting bracket 2, the sliding cylinder 305 is slidably connected to the sliding column 304, a groove body penetrating the side wall of the sliding cylinder 305 is opened on the side wall of the sliding cylinder 305, a plate body is installed on the sliding column 304, and it is connected to the connecting plate 303 through the plate body. The groove body on the sliding cylinder 305 is slidably connected to the plate body, so that the sliding column 304 and the sliding cylinder 305 are slidably matched;

[0054] A hinge rod 306 is hinged on the side wall of the sliding cylinder 305. The free end of the hinge rod 306 is slidably hinged to the sliding rod 301. A kidney-shaped hole is opened on the sliding rod 301. The rod body at the free end of the hinge rod 306 is inserted into the kidney-shaped hole through the rod body, so that the rod body at the free end of the hinge rod 306 can rotate radially in the kidney-shaped hole along its own axis and can also slide along the length direction of the kidney-shaped hole;

[0055] The free end of the sliding column 304 penetrates the sliding cylinder 305 and is provided with a contact plate 307 for abutting against the hinge rod 306. The bottom of the sliding column 304 penetrates the sliding cylinder 305, so that the contact plate 307 is also located at the bottom of the sliding cylinder 305 and between the two hinge rods 306;

[0056] During use, when the connecting plate 303 approaches the mounting bracket 2 along with the abutting block 204, the sliding column 304 drops, causing the abutting plate 307 to slide in a direction away from the hinge rod 306, thereby releasing the abutment on the hinge rod 306. At this time, the return spring 308 pulls the two sliding rods 301 closer to each other, causing the scoop plate 302 to block the safety valve. When it is necessary to release the fixation of the safety valve, the sliding rod 202 slides upward, causing the abutting block 204 to drive the connecting plate 303 away from the mounting bracket 2. At this time, the sliding column 304 pulls the abutting plate 307 to abut on the hinge rod 306, causing the free ends of the hinge rod 306 to move away from each other, and further causing the sliding rods 301 to move away from each other, so that the scoop plate 302 releases the block on the safety valve, facilitating the feeding of the safety valve.

[0057] As Figure 6 shown, in the second embodiment, a connecting rope 401 is installed on one side of the backing plate 4, and the free end of the connecting rope 401 is connected to the connecting plate 303. During use, when the connecting plate 303 approaches the mounting bracket 2, the connecting rope 401 is relaxed, and the backing plate 4 rotates downward under the action of gravity to a position where it blocks the safety valve. When the connecting plate 303 moves away from the mounting bracket 2, the connecting rope 401 is gradually pulled and tightened, thereby pulling the backing plate 4 to rotate, releasing the block on the safety valve and facilitating feeding.

[0058] Among them, a hole through which the connecting rope 401 passes is provided on the mounting bracket 2 for guiding and limiting the connecting rope 401, enabling it to stably pull the backing plate 4.

[0059] When the safety valve is being clamped on the inspection table, the connecting rope 401 is relaxed, and the backing plate 4 will be blocked by the bracket of the inspection table and still remain in an inclined state temporarily. When the device finishes clamping and pulls the safety valve upward and gradually moves away from the inspection table, after the backing plate 4 is no longer blocked, it can rotate to the position of blocking the safety valve under the action of gravity, enabling the backing plate 4 to be in the blocking position.

[0060] Moreover, when it is necessary to feed the safety valve onto the inspection table, the backing plate 4 first lands on the inspection table bracket. When the clamping of the safety valve is released, the connecting rope 401 pulls the backing plate 4 to rotate, causing the backing plate 4 to be withdrawn from the bottom of the safety valve without obstructing the feeding of the safety valve either, increasing the feasibility of the device.

[0061] As Figure 6 and Figure 10 shown, in the second embodiment, the scoop plate 302 is provided with a circular groove 402 and a long groove 403 that communicate with each other. A plug rod 404 is installed on the backing plate 4. When the plug rod 404 is inserted into the circular groove 402, the plug rod 404 is in movable cooperation with the circular groove 402. When the plug rod 404 is inserted into the long groove 403, the plug rod 404 is in sliding cooperation with the long groove 403. The shape of the plug rod 404 is as Figure 10As shown, when the rod 404 is located in the circular groove 402, it can rotate. When it is located in the long groove 403, the inner wall of the long groove 403 blocks the side wall of the rod 404, so that it can only slide in the long groove 403, so that the pad 4 is movably mounted on the pocket plate 302. Figure 1 From the main perspective, the long groove 403 is located below the circular groove 402;

[0062] A collar 406 is slidably mounted on the pocket plate 302 via an auxiliary spring 405, and the collar 406 is rotatably matched with the insertion rod 404. In normal conditions, the auxiliary spring 405 pulls the insertion rod 404 via the collar 406, so that the insertion rod 404 is located in the circular groove 402. In most cases, the backing plate 4 only serves as a safeguard. When the safety valve accidentally falls, it falls on the backing plate 4, causing the auxiliary spring 405 to stretch, and the insertion rod 404 falls into the long groove 403, restricting the rotation of the backing plate 4. The rotation of the backing plate 4 is restricted, and thus the backing plate 4 can better bear the weight of the safety valve in the event of an emergency, thereby increasing the practicality of the device.

[0063] When unloading is required, the pad 4 first falls onto the bracket. At this time, the force of the pad 4 and the safety valve is borne by the bracket. When the device continues to fall, the insertion rod 404 slides upward back into the circular groove 402. At this time, the rotation of the pad 4 is restored and unloading can be completed.

[0064] like Figure 2 、 Figure 3 and Figure 9 As shown, in the second embodiment, the mounting frame 2 is provided with a sliding groove 6 that slides with the slide rod 301, and the connecting plate 303 is provided with an elastic sheet 5, the side wall of the elastic sheet 5 is an arc surface, and the shape of the elastic sheet 5 is as follows: Figure 9 As shown;

[0065] When the locking cam 303 is in the closed position, the locking cam 303 is in the closed position, and the locking cam 303 is in the closed position, so that the locking cam 303 is locked.

[0066] When unloading is required, the connecting plate 303 moves away from the mounting frame 2, driving the elastic sheet 5 to move upward. During the process, the elastic sheet 5 satisfies the pressure of the slide bar 301 through elastic deformation, reducing the possibility of the elastic sheet 5 resetting the slide bar 301 to block it, thereby improving the feasibility of the device.

[0067] Example 3

[0068] like Figure 1 - Figure 10 As shown, the third embodiment further discloses the present application on the basis of the second embodiment. In the third embodiment, a resistance rod 7 is installed on the pocket plate 302 on the side away from the connecting rope 401, and a baffle 8 is installed on the pocket plate 302 on the side close to the connecting rope 401 through a torsion spring. When the resistance rod 7 resists the baffle 8, the baffle 8 rotates to resist the backing plate 4. One end of the baffle 8 is used to resist the resistance rod 7, and the other end is used to block the hinge point of the backing plate 4. The torsion spring makes the baffle 8 in a tilted position under normal conditions.

[0069] The length of the connecting rope 401 is greater than the minimum distance between the connecting plate 303 and the mounting frame 2 but less than the maximum distance between the two, so that when the connecting plate 303 pulls the connecting rope 401, it needs to slide to the maximum limit before pulling the backing plate 4 to release the blocking, that is, the clamping plate 203 is released first, and then the backing plate 4 is released. When the connecting plate 303 approaches the mounting frame 2, the backing plate 4 will be released first, that is, when the backing plate 4 can be rotated by gravity, the clamping plate 203 is still in the process of clamping;

[0070] When clamping, the backing plate 4 first rotates to the blocking position. When the two pocket plates 302 are close to each other to the maximum, the interference rod 7 interferes with the baffle 8, so that the baffle 8 rotates and blocks the direction of the backing plate 4 to return to its original position. The total length of the connecting rope 401 remains unchanged. When the backing plate 4 is pulled, the backing plate 4 will not rotate in the opposite direction of its return. The rotation of the backing plate 4 is restricted, which increases the stability of the backing plate 4 during transportation. At the same time, it is convenient for the insertion rod 404 to slide directly into the long groove 403 when the safety valve falls off unexpectedly, thereby increasing the feasibility of the device.

[0071] When the safety valve is clamped on the inspection table, the backing plate 4 will move into place behind the pocket plate 302. At this time, since the backing plate 4 is on the side of the baffle 8 away from the interference rod 7, when it falls and rotates due to gravity, it will interfere with the baffle 8, and at this time, the side of the baffle 8 that interferes with the interference rod 7 will rotate to the side away from the interference rod 7, until the baffle 8 rotates to the unblocking position, the backing plate 4 rotates to the blocking position. At this time, the torsion spring pulls the baffle 8 to return to the blocking position to block the backing plate 4, making the device feasible.

[0072] When it is necessary to unload the material, the pocket plate 302 and the clamping plate 203 will first be disconnected from the safety valve. When the connecting plate 303 moves upward to a certain height, the connecting rope 401 will be pulled. When the pocket plates 302 move away from each other, the resistance rod 7 releases the resistance to the baffle 8, and the baffle 8 is driven to reset by the torsion spring, so that it releases the obstruction to the pad 4, allowing the pad 4 to complete the unloading, thereby increasing the feasibility of the device.

[0073] In embodiment three, an auxiliary frame 9 is installed on the mounting frame 2, and a driving rod 10 is installed on the auxiliary frame 9 by means of a torsion spring. An extension rod 11 is installed on the driving rod 10, and a holding plate 12 is hinged on the free end of the extension rod 11. When the device is in use, the operator is required to manually guide the movement of the device arm 101, and the auxiliary frame 9 provides the operator with a gripping position. When gripping, the driving rod 10 is rotated, so that the extension rod 11 drives the holding plate 12 to approach the safety valve, pressing it in the vertical upward direction, forcing the safety valve to be closer to the contact plate 2033 and the pocket plate 302, further improving the fixing effect of the device.

[0074] In the third embodiment, a protruding plate 13 is installed on the pocket plate 302 on one side, and a recess 14 for accommodating the protruding plate 13 is provided on the pocket plate 302 on the other side. When the two pocket plates 302 are close to each other, the protruding plate 13 is inserted into the recess 14, which increases the contact area between the two pocket plates 302, thereby increasing the connection strength when the two are connected, reducing the gap between the two, and increasing the practicality of the device.

[0075] In embodiment three, a plurality of rollers 15 are rotatably installed on one side of the pad 4 facing the clamping plate 203. When the pad 4 is unloading, the pad 4 will be pulled out from under the safety valve. The friction between the pad 4 and the safety valve is reduced by the rollers 15, which facilitates unloading and improves the feasibility of the device.

[0076] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping mechanism for safety valve calibration, including a base (1) on which an arm rod (101) is installed, characterized in that, Also includes: A mounting frame (2) is mounted on the free end of the arm (101), a hydraulic rod (201) is mounted on the mounting frame (2), a sliding rod (202) that slides with the mounting frame (2) is mounted on the output end of the hydraulic rod (201), a clamping plate (203) is symmetrically mounted on the mounting frame (2), a connecting spring (206) is mounted between the clamping plate (203) and the mounting frame (2), the inner wall of the clamping plate (203) is an arc-shaped surface, a resisting block (204) is mounted on the sliding rod (202), and an inclined block (205) is mounted on the clamping plate (203), when the resisting block (204) resists the inclined block (205), the two clamping plates (203) are forced to approach each other; A secondary clamp (3) is mounted on the mounting frame (2), the secondary clamp (3) comprising a slide bar (301) symmetrically slidably mounted on the mounting frame (2), a pocket plate (302) being mounted on the slide bar (301), the pocket plate (302) being used to block the space between the clamps (203) along the axial direction of the arcuate surface of the clamps (203); The backing plate (4) is movably mounted on the pocket plate (302), and the backing plate (4) is used to shield the space between the clamping plates (203) from the ground.

2. The clamping mechanism for safety valve calibration according to claim 1, wherein, The clamping plate (203) includes a connecting rod (2031) slidably mounted on the mounting frame (2); a contact plate (2033) is slidably mounted on the connecting rod (2031) via a pulling spring (2032); a guide rod (2034) penetrating the connecting rod (2031) is mounted on the contact plate (2033); and the pulling spring (2032) is sleeved on the outside of the guide rod (2034).

3. The clamping mechanism for safety valve calibration according to claim 2, characterized in that, A return spring (308) is installed between the slide bars (301), a connecting plate (303) is installed on the side wall of the resistance block (204), a sliding column (304) is installed on the connecting plate (303), a sliding cylinder (305) is installed on the mounting frame (2), the sliding cylinder (305) is slidably connected to the sliding column (304), a hinged rod (306) is hinged on the side wall of the sliding cylinder (305), the free end of the hinged rod (306) is slidably hinged to the slide bar (301), the free end of the sliding column (304) passes through the sliding cylinder (305) and is installed with a resistance plate (307), and the resistance plate (307) is used to resist the hinged rod (306).

4. The clamping mechanism for safety valve calibration according to claim 3, characterized in that, A connecting rope (401) is installed on one side of the pad (4), and a free end of the connecting rope (401) is connected to the connecting plate (303).

5. The clamping mechanism for safety valve calibration according to claim 4, wherein The pocket plate (302) is provided with a circular groove (402) and a long groove (403) that are interconnected. The pad (4) is provided with an insertion rod (404). When the insertion rod (404) is inserted into the circular groove (402), the insertion rod (404) and the circular groove (402) are movably matched. When the insertion rod (404) is inserted into the long groove (403), the insertion rod (404) and the long groove (403) are slidably matched. A collar (406) is slidably provided on the pocket plate (302) via an auxiliary spring (405). The collar (406) and the insertion rod (404) are rotatably matched.

6. The clamping mechanism for safety valve calibration according to claim 5, wherein, The mounting frame (2) is provided with a sliding groove (6) that is slidably matched with the sliding rod (301), and an elastic sheet (5) is installed on the connecting plate (303). The side wall of the elastic sheet (5) is an arc-shaped surface. When the connecting plate (303) is close to the mounting frame (2), one side of the elastic sheet (5) contacts the inner wall of the sliding groove (6) and the other side contacts the sliding rod (301).

7. The clamping mechanism for safety valve calibration according to claim 6, wherein, A resisting rod (7) is installed on the pocket plate (302) on the side away from the connecting rope (401), and a baffle (8) is rotatably installed on the pocket plate (302) on the side close to the connecting rope (401) via a torsion spring. When the resisting rod (7) resists the baffle (8), the baffle (8) rotates until it resists the pad (4).

8. The clamping mechanism for safety valve calibration according to claim 7, characterized in that, An auxiliary frame (9) is mounted on the mounting frame (2), a driving rod (10) is rotatably mounted on the auxiliary frame (9) via a torsion spring, an extension rod (11) is mounted on the driving rod (10), and a holding plate (12) is hinged on the free end of the extension rod (11).

9. The clamping mechanism for safety valve calibration according to claim 8, characterized in that, A protruding plate (13) is installed on the pocket plate (302) on one side, and a recess (14) for accommodating the protruding plate (13) is provided on the pocket plate (302) on the other side.

10. The clamping mechanism for safety valve calibration according to claim 9, characterized in that, A plurality of rollers (15) are rotatably mounted on one side of the pad (4) facing the clamping plate (203).

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