Valve mechanical clamp

Abstract

The present application relates to a kind of valve mechanical clamps, including quick-change assembly, cylinder assembly and finger structure, the quick-change assembly includes connecting frame and connecting disc, the top of connecting frame is provided with connecting disc, and the top of connecting disc is connected with cylinder assembly.Adaptive fitting: even if the arc surface of the finger insert block cannot be completely close to the clamping surface of the valve flange plate when initially clamping, when the direction of resultant force deviates from the clamping force direction of the finger body, the finger insert block will float, so that the arc surface partially fits the clamping surface of the valve flange plate.

Description

Technical Field

[0001] This invention belongs to the field of mechanical clamps, specifically a mechanical clamp. Background Technology

[0002] In the 1980s and 1990s, four-jaw grippers began to become popular. Their design concept originated from "simulating the coordinated grasping of human fingers". By using four claws, different trajectories can be achieved through independent drive (such as servo motors and pneumatic cylinders), thereby adjusting the distribution of gripping force and adapting to large, irregularly shaped, and fragile objects (such as car bumpers and LCD panels).

[0003] However, existing four-jaw clamps generally use a rigid clamping finger structure and cannot be floated. This results in a low degree of contact between the clamping surfaces when the four-jaw clamps grip the valve flange plate because the valve flange plate is not completely horizontal. This may lead to the valve flange plate loosening and falling off. Therefore, a valve mechanical clamp is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: the existing four-jaw clamps generally adopt a rigid clamping finger structure and cannot be floated and adjusted. As a result, when the four-jaw clamps grasp the valve flange plate, the clamping surface will not be fully level, which may lead to the valve flange plate loosening and falling off.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a valve mechanical clamp, comprising a quick-change assembly, a cylinder assembly and a finger clamping structure, wherein the quick-change assembly comprises a connecting frame and a connecting plate, the top of the connecting frame is provided with a connecting plate, and the top of the connecting plate is connected to a cylinder assembly;

[0007] The cylinder assembly includes a connecting cylinder, a limiting seat, limiting channels, and a slider. The lower side of the connecting cylinder is connected to the upper side of the connecting plate, and the top of the connecting cylinder is fixedly connected to the limiting seat. The top of the limiting seat has four limiting channels arranged in a circular array. The slider is equipped with a finger clamping structure.

[0008] As a preferred technical solution for valve mechanical clamps, the limiting channel and the slider are inverted T-shaped, and the limiting seat is connected to the synchronous pneumatic mechanism.

[0009] As a preferred technical solution for valve mechanical clamps, the clamping finger structure includes a clamping finger body, a connecting groove, a body mounting screw, an equalizing screw, a clamping finger floating seat, and a clamping finger insert. The bottom of the clamping finger body has a connecting groove. One end of the body mounting screw passes through the connecting groove and is threadedly connected to the slider. The head of the body mounting screw abuts against the clamping finger body. The top of the clamping finger body is connected to the clamping finger floating seat. An equalizing screw is provided on one side of the clamping finger floating seat. The bottom end of the equalizing screw is threadedly connected to the top of the clamping finger body. A clamping finger insert is provided on the other side of the clamping finger floating seat. The vertical surface of the clamping finger insert away from the clamping finger floating seat is an arc surface. The clamping finger floating seat is movably connected to the clamping finger body.

[0010] If the arc surface of the finger insert cannot be completely pressed against the clamping surface of the valve flange plate during initial clamping, and the direction of the resultant force deviates from the clamping force direction of the finger body, the finger insert will float, causing the arc surface to partially press against the clamping surface of the valve flange plate.

[0011] As a preferred technical solution for valve mechanical clamps, the clamping finger structure also includes a floating sleeve, a limiting pin, and a floating groove. The top of the equal-height screw is fitted with a floating sleeve, the top of the floating sleeve extends into the inner side of the clamping finger floating seat, a limiting pin is inserted into one side of the lower side of the clamping finger floating seat, and a floating groove is opened on one side of the upper side of the clamping finger body. The diameter of the floating groove is more than 1.3 times the diameter of the limiting pin, and the limiting pin extends into the floating groove.

[0012] The equal-height screw is rotatably connected to the floating sleeve. The finger-clamping floating seat can rotate around the common central axis of the floating sleeve and the equal-height screw. The limiting pin cooperates with the floating groove. The limiting pin moves in the floating groove, limiting the rotation range of the finger-clamping floating seat around the central axis of the floating sleeve. That is, the finger-clamping floating seat and the finger-clamping insert can float within a certain range.

[0013] As a preferred technical solution for valve mechanical clamps, the distance between the lower side of the clamping finger insert and the upper side of the clamping finger body is more than 2 mm. Each limiting channel is connected near the center of the connecting cylinder. The limiting channel near the center of the connecting cylinder is covered with a cover plate. The clamping finger body and the cover plate are fitted with a clearance.

[0014] As a preferred technical solution for valve mechanical clamps, the synchronous pneumatic mechanism includes a synchronous cylinder, a recovery groove, a connecting pipe one, a central cavity, a movable circular groove, an annular cavity, a connecting pipe two, a piston, a connecting shaft, and a connecting plate. A central groove is formed on the upper side of the connecting cylinder. A synchronous cylinder is installed on the inner bottom wall of the central groove. A central cavity is formed in the middle of the synchronous cylinder. Four movable circular grooves are evenly formed on the inner wall of the central cavity. An annular cavity is also formed on the synchronous cylinder, and the annular cavity is connected to one end of the movable circular groove. Four recovery grooves are evenly formed on the outer circumference of the synchronous cylinder. A connecting groove connects the recovery groove and the annular cavity, and the central axis of the connecting groove coincides with the central axis of the movable circular groove. A piston is movably inserted into each movable circular groove. A connecting shaft is set in the middle of the piston. One end of the connecting shaft passes through the annular cavity and the connecting groove and is connected to the connecting plate. The connecting plate and the slider are fixedly connected by bolts, and the connecting plate and the slider correspond one-to-one.

[0015] The annular cavity, movable circular groove, central cavity, and piston work together to enable the four gripper inserts to separate or come together synchronously, thus achieving rapid and stable clamping.

[0016] As a preferred technical solution for a valve mechanical clamp, the cylinder assembly also includes a connector one and a connector two. The connector one is provided on the outside of the connecting cylinder, and the connector two is provided on the outside of the connecting frame. The connector two is connected to the connecting pipe one, and the connecting pipe two is connected to the connector one.

[0017] The inner bottom wall of the central cavity is connected to connecting pipe one, and the inner bottom wall of the annular cavity is connected to connecting pipe two.

[0018] As a preferred technical solution for valve mechanical clamps, a connecting groove is opened at each end of the connecting frame, and a connecting bolt is inserted into the connecting groove.

[0019] As a preferred technical solution for valve mechanical clamps, the connecting plate is L-shaped and is movably connected to the recovery tank. The end of the connecting shaft away from the piston is movably inserted into the recovery tank.

[0020] As a preferred technical solution for a valve mechanical clamp, the piston has several gap spacers arranged in a ring on the side facing the annular cavity, and the gap spacers are movably connected to the inner wall of the annular cavity;

[0021] The gap spacer forms a gap in the annular cavity to prevent the piston from being too close to the annular cavity, which would close the opening of the connecting pipe and prevent the piston from moving.

[0022] Without floating, when the clamping surface of the valve flange is not fully in contact with the clamping surface, the arc surface of the clamping finger insert will not be completely in contact with the clamping surface of the valve flange during clamping, making it prone to loosening. The floating design causes the arc surface of the clamping finger insert to not be completely in contact with the clamping surface of the valve flange when clamping it. The resultant force on the clamping finger insert is not along the direction of the clamping force of the clamping finger body, causing the clamping finger insert to float. The arc surface of the clamping finger insert then partially contacts the clamping surface of the valve flange. During continued clamping, the clamping force acts on the changing posture of the valve flange, making the arc surface of the clamping finger insert fit even better with the clamping surface of the valve flange.

[0023] The beneficial effects of a valve mechanical clamp of the present invention are as follows: adaptive fit: when the initial clamping is not possible, the arc surface of the clamping finger insert cannot be completely pressed against the clamping surface of the valve flange plate. When the direction of the resultant force deviates from the clamping force direction of the clamping finger body, the clamping finger insert will float, so that the arc surface part is in contact with the clamping surface of the valve flange plate.

[0024] Dynamic posture adjustment: During the continued clamping process, high-pressure gas is pumped into the annular cavity through connector one and connecting pipe two. The high-pressure gas evenly compresses the four pistons to move synchronously. The pistons drive the slider and the clamping finger structure to converge towards the center through the connecting shaft and connecting plate. The clamping force acts on the valve flange plate, causing its posture to be dynamically adjusted, ultimately making the arc surface of the clamping finger insert fit more tightly with the clamping surface of the valve flange plate.

[0025] Improve clamping stability: The floating design effectively prevents loosening during clamping, while the gap spacer forms a gap in the annular cavity to prevent the piston from being tightly attached to the annular cavity, which would cause the opening of the connecting pipe two to be closed and prevent the piston from being unable to move. This improves the adaptability of the clamp to valve flanges with low surface adhesion, clamping reliability and overall operating efficiency.

[0026] Synchronous clamping: The annular cavity, movable circular groove, central cavity and piston work together to realize the synchronous separation or convergence of the four clamping finger inserts, thereby achieving fast and stable clamping. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a cross-sectional view of the front of the present invention;

[0030] Figure 3 This is a top view of the structure of the present invention;

[0031] Figure 4 This is a cross-sectional structural diagram of the synchronizing cylinder of the present invention;

[0032] Figure 5 This is a schematic diagram showing the connection structure between the finger clamping body, the equal-height screw, and the finger clamping insert of the present invention;

[0033] Figure 6 This is a schematic diagram showing the positional relationship between the equal-height screw and the floating sleeve of the present invention;

[0034] Figure 7 For the present invention Figure 2 A magnified schematic diagram of part A in the middle.

[0035] Reference numerals: 100, Quick-change assembly; 101, Connecting frame; 102, Connecting plate; 103, Connecting bolt; 104, Connecting groove; 200, Cylinder assembly; 201, Connecting cylinder; 202, Limiting seat; 203, Limiting channel; 204, Slider; 205, Connector 1; 206, Cover plate; 207, Center groove; 208, Connecting plate; 211, Synchronous cylinder; 212, Connecting pipe 1; 213, Center cavity; 214, Live... 215. Moving circular groove; 216. Annular cavity; 217. Recycling trough; 218. Connecting pipe II; 219. Piston; 220. Connecting shaft; 221. Gap spacer; 222. Connector II; 300. Finger clamping structure; 301. Finger clamping body; 302. Connecting groove; 303. Body mounting screw; 304. Equal height screw; 305. Finger clamping floating seat; 306. Finger clamping insert; 307. Floating sleeve; 308. Limiting pin; 309. Floating groove. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0040] like Figures 1-7 As shown, the present invention proposes a valve mechanical clamp, including a quick-change assembly 100, a cylinder assembly 200 and a finger clamping structure 300. The quick-change assembly 100 includes a connecting frame 101 and a connecting plate 102. The connecting plate 102 is provided at the top of the connecting frame 101, and the cylinder assembly 200 is connected to the top of the connecting plate 102.

[0041] The cylinder assembly 200 includes a connecting cylinder 201, a limiting seat 202, a limiting channel 203, and a slider 204. The lower side of the connecting cylinder 201 is connected to the upper side of the connecting plate 102, and the top of the connecting cylinder 201 is fixedly connected to the limiting seat 202. The top of the limiting seat 202 has four limiting channels 203, which are arranged in a circular array. The slider 204 is equipped with a finger clamping structure 300.

[0042] The limiting channel 203 and the slider 204 are inverted T-shaped, and the limiting seat 202 is connected to the synchronous pneumatic mechanism.

[0043] The finger clamping structure 300 includes a finger clamping body 301, a connecting groove 302, a body mounting screw 303, a height equalizing screw 304, a finger clamping floating seat 305, and a finger clamping insert 306. The bottom of the finger clamping body 301 has a connecting groove 302. One end of the body mounting screw 303 passes through the connecting groove 302 and is threadedly connected to the slider 204. The head of the body mounting screw 303 abuts against the finger clamping body 301. The top of the finger clamping body 301 is connected to the finger clamping floating seat 305. One side of the finger clamping floating seat 305 is provided with a height equalizing screw 304. The bottom end of the height equalizing screw 304 is threadedly connected to the top of the finger clamping body 301. The other side of the finger clamping floating seat 305 is provided with a finger clamping insert 306. The vertical surface of the finger clamping insert 306 away from the finger clamping floating seat 305 is an arc surface. The finger clamping floating seat 305 is movably connected to the finger clamping body 301.

[0044] Adaptive fit: Even if the arc surface of the finger insert 306 cannot be completely pressed against the clamping surface of the valve flange plate during initial clamping, and the direction of the resultant force deviates from the clamping force direction of the finger body 301, the finger insert 306 will float, so that the arc surface partially fits against the clamping surface of the valve flange plate.

[0045] The finger clamping structure 300 also includes a floating sleeve 307, a limiting pin 308, and a floating groove 309. The top of the equalizing screw 304 is fitted with the floating sleeve 307. The top of the floating sleeve 307 extends into the inner side of the finger clamping floating seat 305. The limiting pin 308 is inserted into one side of the lower side of the finger clamping floating seat 305. A floating groove 309 is opened on one side of the upper side of the finger clamping body 301. The diameter of the floating groove 309 is more than 1.3 times the diameter of the limiting pin 308. The limiting pin 308 extends into the floating groove 309.

[0046] The equalizing screw 304 is rotatably connected to the floating sleeve 307. The finger-clamping floating seat 305 can rotate around the common central axis of the floating sleeve 307 and the equalizing screw 304. The limiting pin 308 cooperates with the floating groove 309. The limiting pin 308 moves within the floating groove 309, limiting the rotation range of the finger-clamping floating seat 305 around the central axis of the floating sleeve 307. That is, the finger-clamping floating seat 305 and the finger-clamping insert 306 can float within a certain range.

[0047] The distance between the lower side of the finger clamping insert 306 and the upper side of the finger clamping body 301 is more than 2 mm. Each limiting channel 203 is connected near the center of the connecting cylinder 201. The limiting channel 203 near the center of the connecting cylinder 201 is covered by a cover plate 206. The finger clamping body 301 and the cover plate 206 are fitted with a clearance.

[0048] The synchronous pneumatic mechanism includes a synchronous cylinder 211, a recovery groove 216, a first connecting pipe 212, a central cavity 213, a movable circular groove 214, an annular cavity 215, a second connecting pipe 218, a piston 219, a connecting shaft 220, and a connecting plate 208. A central groove 207 is provided on the upper side of the connecting cylinder 201. The synchronous cylinder 211 is provided on the inner bottom wall of the central groove 207. A central cavity 213 is provided in the middle of the synchronous cylinder 211. Four movable circular grooves 214 are evenly provided on the inner wall of the central cavity 213. An annular cavity 215 is also provided on the synchronous cylinder 211. One end of the annular cavity 215 is connected to one end of the movable circular groove 214. Four recovery grooves 216 are evenly provided on the outer circumference of the synchronous cylinder 211. A connecting groove is provided between the recovery groove 216 and the annular cavity 215. The central axis of the connecting groove coincides with the central axis of the movable circular groove 214.

[0049] Each movable circular groove 214 is movably connected to a piston 219. A connecting shaft 220 is provided in the middle of the piston 219. One end of the connecting shaft 220 passes through the annular cavity 215 and the connecting groove and is connected to the connecting plate 208. The connecting plate 208 and the slider 204 are fixedly connected by bolts. The connecting plate 208 and the slider 204 correspond one-to-one.

[0050] The annular cavity 215, the movable circular groove 214, the central cavity 213, and the piston 219 work together to enable the four gripper inserts 306 to separate or come together synchronously, thereby achieving fast and stable clamping.

[0051] The cylinder assembly 200 also includes a first connector 205 and a second connector 222. The first connector 205 is provided on the outer side of the connecting cylinder 201, and the second connector 222 is provided on the outer side of the connecting bracket 101. The second connector 222 is connected to the first connecting pipe 212, and the second connecting pipe 218 is connected to the first connector 205.

[0052] The inner bottom wall of the central cavity 213 is connected to the first connecting pipe 212, the inner bottom wall of the annular cavity 215 is connected to the second connecting pipe 218, and the inner cavity of the annular cavity 215 is connected to the inner cavity of the second connecting pipe 218.

[0053] A connecting groove 104 is provided at each end of the connecting frame 101, and a connecting bolt 103 is inserted into the connecting groove 104.

[0054] The connecting plate 208 is L-shaped and is movably connected to the recycling tank 216. The end of the connecting shaft 220 away from the piston 219 is movably inserted into the recycling tank 216.

[0055] The piston 219 has several gap spacers 221 arranged in a ring on the side facing the annular cavity 215, and the gap spacers 221 are movably connected to the inner wall of the annular cavity 215.

[0056] The gap spacer 221 forms a gap in the annular cavity 215 to prevent the piston from being tightly pressed against the annular cavity 215, which would cause the opening of the connecting pipe 218 to be closed and prevent the piston from moving.

[0057] The gap spacer 221 separates the inner wall of the annular cavity 215 from the outer side of the piston 219, creating a gap between the piston 219 and the inner wall of the annular cavity 215. Gas is pumped into the annular cavity 215, and the gas can enter the gap between the piston 219 and the annular cavity 215 to push the piston 219 to move.

[0058] The central axis of the limiting pin 308 coincides with the central axis of the floating groove 309.

[0059] The specific implementation method is as follows: Connector 1 205 is connected to the high-pressure gas supply pipe, and high-pressure gas is pumped into the annular cavity 215 through connector 1 205 and connecting pipe 2 218. The high-pressure gas uniformly compresses the four pistons 219 to move synchronously. The pistons 219 move along the axis of the movable circular groove 214. The pistons 219 move through the connecting shaft 220, connecting plate 208 and slider 204. The slider 204 brings the finger clamping structure 300 to the center. During the process of the finger clamping structure 300 converging, the finger clamping insert 306 clamps the valve flange plate in the center part of the four finger clamping inserts 306. The gas in the central cavity 213 is discharged from the connecting pipe 1 212 and connector 2 222.

[0060] Connector 222 is connected to the high-pressure gas supply pipe, allowing high-pressure gas to be pumped into the central cavity 213 through connecting pipe 1 212 and connector 222, simultaneously pushing the four pistons 219 to move in opposite directions, causing the four finger inserts 306 to separate synchronously, and the gas in the annular cavity 215 is discharged through connector 1 205 and connecting pipe 2 218.

[0061] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A valve mechanical clamp, characterized in that: The device includes a quick-change assembly (100), a cylinder assembly (200), and a finger clamping structure (300). The quick-change assembly (100) includes a connecting frame (101) and a connecting plate (102). The connecting plate (102) is provided at the top of the connecting frame (101), and the cylinder assembly (200) is connected to the top of the connecting plate (102). The cylinder assembly (200) includes a connecting cylinder (201), a limiting seat (202), a limiting channel (203), and a slider (204). The lower side of the connecting cylinder (201) is connected to the upper side of the connecting plate (102), and the top of the connecting cylinder (201) is fixedly connected to the limiting seat (202). The top of the limiting seat (202) is provided with four limiting channels (203). The limiting channels (203) are arranged in a ring array, and the slider (204) is equipped with a finger clamping structure (300); the limiting channels (203) and the slider (204) are in the shape of an inverted T, and the limiting seat (202) is connected to the synchronous pneumatic mechanism; the synchronous pneumatic mechanism includes a synchronous cylinder (211), a recovery tank (216), a connecting pipe one (212), a central cavity (213), a movable circular groove (214), an annular cavity (215), a connecting pipe two (218), a piston (219), a connecting shaft (220), and a connecting plate (208). A central groove (207) is opened on the upper side of the connecting cylinder (201), and a synchronous cylinder (211) is provided on the inner bottom wall of the central groove (207). The synchronous cylinder (211) has a central cavity (213) in the middle, and four movable circular grooves (214) are evenly distributed on the inner wall of the central cavity (213). An annular cavity (215) is also provided on the synchronous cylinder (211), and one end of the annular cavity (215) is connected to one end of the movable circular groove (214). Four recovery grooves (216) are evenly distributed on the outer circumference of the synchronous cylinder (211). A connecting groove is provided between the recovery groove (216) and the annular cavity (215). The central axis of the connecting groove coincides with the central axis of the movable circular groove (214). A piston (219) is movably inserted into each movable circular groove (214). A connecting shaft (220) is provided in the middle of the piston (219). One end of the connecting shaft (220) passes through the annular cavity. (215) and connecting groove, and connected to connecting plate (208), connecting plate (208) and slider (204) correspond one to one, connecting plate (208) and slider (204) are fixedly connected by bolts; cylinder assembly (200) also includes connector one (205) and connector two (222), connector one (205) is provided on the outside of connecting cylinder (201), connector two (222) is provided on the outside of connecting frame (101), connector two (222) is connected to connecting pipe one (212), connecting pipe two (218) is connected to connector one (205); the inner bottom wall of central cavity (213) is connected to connecting pipe one (212), and the inner bottom wall of annular cavity (215) is connected to connecting pipe two (218);The connecting plate (208) is L-shaped and is movably connected to the recycling tank (216). The end of the connecting shaft (220) away from the piston (219) is movably inserted into the recycling tank (216).

2. The valve mechanical clamp according to claim 1, characterized in that: The finger clamping structure (300) includes a finger clamping body (301), a connecting groove (302), a body mounting screw (303), a height equalizing screw (304), a finger clamping floating seat (305), and a finger clamping insert (306). The bottom of the finger clamping body (301) is provided with a connecting groove (302). One end of the body mounting screw (303) passes through the connecting groove (302) and is threadedly connected to the slider (204). The top of the finger clamping body (301) is connected to the finger clamping floating seat (305). One side of the finger clamping floating seat (305) is provided with a height equalizing screw (304). The bottom end of the height equalizing screw (304) is threadedly connected to the top of the finger clamping body (301). The other side of the finger clamping floating seat (305) is provided with a finger clamping insert (306). The vertical surface of the finger clamping insert (306) away from the finger clamping floating seat (305) is an arc surface. The finger clamping floating seat (305) is movably connected to the finger clamping body (301).

3. A valve mechanical clamp according to claim 2, characterized in that: The finger clamping structure (300) also includes a floating sleeve (307), a limiting pin (308), and a floating groove (309). The top of the equal-height screw (304) is fitted with a floating sleeve (307). The top of the floating sleeve (307) extends into the inner side of the finger clamping floating seat (305). A limiting pin (308) is inserted into one side of the lower side of the finger clamping floating seat (305). A floating groove (309) is provided on one side of the upper side of the finger clamping body (301). The diameter of the floating groove (309) is more than 1.3 times the diameter of the limiting pin (308). The limiting pin (308) extends into the floating groove (309).

4. A valve mechanical clamp according to claim 2, characterized in that: The distance between the lower side of the finger clamping insert (306) and the upper side of the finger clamping body (301) is more than 2 mm. Each limiting channel (203) is connected to the center part of the connecting cylinder (201). The center part of the limiting channel (203) near the connecting cylinder (201) is covered by a cover plate (206). The finger clamping body (301) and the cover plate (206) are fitted with a clearance.

5. A valve mechanical clamp according to claim 1, characterized in that: A connecting groove (104) is provided at each end of the connecting frame (101), and a connecting bolt (103) is inserted into the connecting groove (104).

6. A valve mechanical clamp according to claim 1, characterized in that: The piston (219) has several gap spacers (221) arranged in a ring on the side facing the annular cavity (215), and the gap spacers (221) are movably connected to the inner wall of the annular cavity (215).

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