Gate valve

Abstract

The present invention relates to a gate valve. The gate valve comprises a door plate having an inlet and outlet; a valve plate, a first side of which is rotatably arranged on the door plate, and the valve plate has a floating gap relative to the door plate; an elastic mechanism, which is arranged between the valve plate and the door plate, and has an elastic force that pushes the valve plate to move in a direction away from the door plate; and a clamping mechanism, which is arranged on the door plate, and when the clamping mechanism abuts against the second side of the valve plate, the clamping mechanism presses the valve plate against the door plate. The gate valve of the present invention has an elastic mechanism arranged between the valve plate and the door plate, and the elastic mechanism can propel the first side of the valve plate and the door plate apart, so that there is a floating gap at the rotation point of the valve plate and the door plate, so that the valve plate is not easily worn when it rotates relative to the door plate. The clamping mechanism can be used to press the valve plate against the door plate, thereby ensuring the sealing of the gate valve.

Description

Technical Field

[0001] The invention relates to the technical field of cutting devices, in particular to a gate valve. Background Art

[0002] During the production process, there are high requirements for the sealing of the production line, and gate valves are usually set at the inlet and outlet of the production line. The traditional gate valve includes a door plate and a valve plate. The door plate is sealed and assembled with the edge of the inlet and outlet of the production line. The door plate is provided with an inlet and outlet. The valve plate is rotatably set on the door plate, and the valve plate seals or opens the inlet and outlet on the door plate. In order to ensure the sealing of the traditional gate valve, the door plate and the valve plate must be tightly fitted. In the mass production process, the valve plate needs to move relative to the door plate frequently to seal or open the inlet and outlet on the door plate, which makes the traditional gate valve easy to wear during use and leads to poor sealing performance. Summary of the invention

[0003] Based on this, it is necessary to provide a gate valve to address the problem that traditional gate valves are easily worn during use, resulting in poor sealing performance.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A gate valve, comprising:

[0006] Door panels, with inlet and outlet;

[0007] A valve plate, a first side edge of which is rotatably disposed on the door plate, and the valve plate has a floating gap relative to the door plate, and the valve plate is used to seal or open the inlet and outlet;

[0008] An elastic mechanism, disposed between the valve plate and the door plate, the elastic mechanism having an elastic force for pushing the valve plate to move in a direction away from the door plate; and

[0009] The clamping mechanism is arranged on the door plate. When the clamping mechanism abuts against the second side edge of the valve plate, the clamping mechanism presses the valve plate against the door plate. When the clamping mechanism separates from the second side edge of the valve plate, the elastic mechanism pushes the first side edge of the valve plate to move away from the door plate within the floating gap.

[0010] In one embodiment, the gate valve further comprises two mounting seats, each of which is provided with a mounting cavity; the two mounting seats are both provided on the gate plate and are located on both sides of the inlet and outlet;

[0011] Door shafts are arranged at both ends of the first side of the valve plate, and each door shaft is rotatably arranged in the mounting cavities of the two mounting seats, and there is a gap between the door shaft and the inner wall of the mounting cavity; the elastic mechanism includes a plurality of first elastic members, and at least one first elastic member is installed on each mounting seat, and the first elastic member is used to provide a force to the door shaft away from the door plate, so that the first side of the valve plate moves in a direction away from the door plate within the floating gap.

[0012] In one embodiment, the gate valve further includes a bearing, which is installed in the installation cavity, the inner ring of the bearing is fixedly connected to the gate shaft, and the outer ring of the bearing has a floating gap with the inner wall of the installation cavity; the first elastic member abuts against the outer ring of the bearing.

[0013] In one embodiment, the clamping mechanism comprises:

[0014] A power structure is arranged on the door panel; and

[0015] The pressure block is connected to the power structure, and the power structure can drive the pressure block to move and abut against the valve plate, so that the valve plate is pressed tightly against the door plate.

[0016] In one of the embodiments, the power structure includes a second power source and a transmission shaft; the transmission shaft is arranged on the door panel, and the pressure block is arranged on the transmission shaft; the second power source is connected to the transmission shaft, and the second power source can drive the transmission shaft to move so that the pressure block can be pressed against the valve plate.

[0017] In one of the embodiments, a base is provided on the door panel, a mounting hole is provided on the base, a transmission shaft is passed through the mounting hole and can slide relative to the door panel along the axial direction of the door shaft; one end of the pressure block is provided on the transmission shaft, and the other end is provided with a pressure surface, and the pressure block is placed on the valve plate through the pressure surface and moves relative to the valve plate.

[0018] In one embodiment, the valve plate includes a valve plate body and a force block, the door shaft is arranged on one side of the valve plate body, and the force block is arranged on the other side of the valve plate body, and the force block is used to abut and cooperate with the pressure block.

[0019] In one of the embodiments, a surface of the force-bearing block in contact with the pressure block is a limit surface, and the limit surface is used to limit the distance that the pressure block moves axially relative to the valve plate along the transmission shaft.

[0020] In one embodiment, the gate valve further comprises a guide seat and a guide shaft, the guide seat is provided with a guide hole, the guide shaft is slidably arranged in the guide hole, and the guide shaft is parallel to the transmission shaft;

[0021] One end of the pressure block away from the transmission shaft is connected to the guide shaft, and the guide shaft is used to limit the movement of the pressure block along the axial direction of the guide shaft.

[0022] In one of the embodiments, two limit blocks are arranged at intervals on the transmission shaft, and the pressure block is slidably arranged on the transmission shaft and is located between the two limit blocks; a second elastic member is arranged between the pressure block and one of the limit blocks, and the second elastic member is used to adjust the axial movement position of the pressure block along the transmission shaft so that the pressure block and the force-bearing block can abut and cooperate.

[0023] The above-mentioned gate valve has at least the following technical effects:

[0024] The gate valve of the present invention is provided with an elastic mechanism between the valve plate and the door plate, and the elastic mechanism can prop open the first side edge of the valve plate and the door plate, so that there is a floating gap at the rotation point of the valve plate and the door plate. When the second side edge of the valve plate abuts against the valve plate, the clamping mechanism presses the valve plate against the door plate and seals the inlet and outlet on the door plate. When the second side edge of the valve plate is separated from the door plate, the first side edge of the valve plate moves in a direction away from the door plate under the action of the elastic mechanism, so the valve plate is not easily worn when rotating relative to the door plate. The gate valve of the present invention can not only greatly reduce the wear of the gate valve during use, but also ensure the sealing of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a gate valve provided by an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic structural diagram of another perspective of the structure shown;

[0027] Figure 3 for Figure 1 A front view of the structure shown along the S direction;

[0028] Figure 4 for Figure 3 AA schematic diagram of the structure shown;

[0029] Figure 5 for Figure 3 BB schematic diagram of the structure;

[0030] Figure 6 A schematic diagram of the internal structure of the gate valve provided in this embodiment.

[0031] in:

[0032] 100-door panel;

[0033] 101-Import and export;

[0034] 200-valve plate;

[0035] 210-door axis; 220-stress block; 221-limiting surface;

[0036] 230-mounting seat; 240-bearing; 250-O-ring;

[0037] 300-elastic mechanism;

[0038] 400-clamping mechanism;

[0039] 410- second power source;

[0040] 420-transmission shaft; 421-limiting block; 422-second elastic member;

[0041] 430-pressure block; 431-pressure surface; 440-base;

[0042] 500-first power source;

[0043] 510-coupling;

[0044] 600-guide shaft;

[0045] 700-Guide seat. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the valve of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0047] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] like Figures 1 to 4As shown, a gate valve according to an embodiment of the present invention comprises: a door plate 100, a valve plate 200, an elastic mechanism 300 and a pressing mechanism 400. The door plate 100 has an inlet and outlet 101. The first side of the valve plate 200 is rotatably arranged on the door plate 100, and the valve plate 200 has a floating gap relative to the door plate 100, and the valve plate 200 is used to seal or open the inlet and outlet 101. The elastic mechanism 300 is arranged between the valve plate 200 and the door plate 100, and the elastic mechanism 300 has an elastic force that pushes the valve plate 200 to move in a direction away from the door plate 100. The clamping mechanism 400 is arranged on the door plate 100. When the clamping mechanism 400 abuts against the second side edge of the valve plate 200, the clamping mechanism 400 presses the valve plate 200 against the door plate 100. When the clamping mechanism 400 is separated from the second side edge of the valve plate 200, the elastic mechanism 300 pushes the first side edge of the valve plate 200 to move away from the door plate 100 within the floating gap.

[0050] There are many ways in which the valve plate 200 can be rotatably arranged on the door plate 100, for example: two long strip brackets are arranged at intervals at both ends of the inlet and outlet 101 on the door plate 100, each of which is provided with a waist-shaped hole, and the length direction of the waist-shaped hole is perpendicular to the door plate 100; a rotating shaft is arranged on the valve plate 200, a sleeve is sleeved on the rotating shaft, and a sliding rod is symmetrically arranged on the outer circumference of the sleeve, and the sliding rod is inserted into the waist-shaped hole of the long strip bracket. The elastic mechanism 300 described below is arranged between the two long strip brackets to push the sleeve to move in the waist-shaped hole.

[0051] The elastic mechanism 300 can have various structural forms. For example, the elastic mechanism 300 can be a spring sheet, a coil spring or other elastic materials, as long as it can play an elastic role. The number of the elastic mechanism 300 is at least one, and those skilled in the art can set the number of the elastic mechanism 300 according to actual needs.

[0052] The structure of the clamping mechanism 400 can be in various forms. For example, the clamping mechanism 400 includes a hand wheel, a threaded column and a pressing plate. The hand wheel is arranged at one end of the threaded column. The pressing plate is provided with a mounting hole. The threaded column is inserted into the mounting hole and can cooperate with the nut provided on the door panel 100. One end of the pressing plate is rotatably connected with the door panel 100, and the other end is used to abut against the valve plate 200. When it is necessary to seal the inlet and outlet 101 on the door panel 100, the pressing plate is rotated to abut against the valve plate 200. At this time, the threaded column is inserted into the nut, and the hand wheel is used to screw the threaded column into the nut. At the same time, the hand wheel presses the pressing plate, so that the valve plate 200 is pressed against the door panel 100.

[0053] Of course, the pressing mechanism 400 can also be an automated device. In one embodiment, the pressing mechanism 400 includes a power structure and a pressure block 430. The power structure is disposed on the door panel 100, and the pressure block 430 is connected to the power structure. The power structure can drive the pressure block 430 to move and abut against the valve plate 200, so that the valve plate 200 is pressed against the door panel 100. The power structure can be a motor, which is fixed on the door panel 100. The pressure block 430 is disposed on the output shaft of the motor, and the motor drives the pressure block 430 to rotate so as to be pressed against the valve plate 200. Of course, the motor can be replaced with other power sources that can drive the pressure block 430 to rotate and press against the valve plate 200.

[0054] In addition, in the above example, the power structure may include two telescopic cylinders. A mounting plate is vertically arranged on the door panel 100, one end of the first telescopic cylinder is arranged on the mounting plate, the other end of the first telescopic cylinder is connected to one end of the second telescopic cylinder, and the pressure block 430 is arranged at the other end of the second telescopic cylinder. When it is necessary to seal the inlet and outlet 101 on the door panel 100, the first telescopic cylinder drives the second telescopic cylinder to move, and the second telescopic cylinder drives the pressure block 430 to move and press on the valve plate 200. In this way, the relative rotation of the valve plate 200 relative to the door panel 100 is not hindered, and the valve plate 200 can be pressed when the valve plate 200 seals the inlet and outlet 101 on the door panel 100.

[0055] The gate valve of the embodiment of the present invention is provided with an elastic mechanism 300 between the valve plate 200 and the door plate 100. The elastic mechanism 300 can prop open the first side of the valve plate 200 and the door plate 100, so that there is a floating gap at the rotation point of the valve plate 200 and the door plate 100. When the second side of the valve plate 200 abuts against the valve plate 200, the clamping mechanism 400 presses the valve plate 200 against the door plate 100 and seals the inlet and outlet 110 on the door plate 100. When the second side of the valve plate 200 is separated from the door plate 100, the valve plate 200 is not easily worn when rotating relative to the door plate 100 under the action of the elastic mechanism. The gate valve of the present invention can not only greatly reduce the wear of the gate valve during use, but also ensure the sealing of the gate valve.

[0056] like Figures 3 to 5As shown, as an implementable method, the gate valve further includes two mounting seats 230, each of which is provided with a mounting cavity; the two mounting seats 230 are both provided on the door plate 100 and are located on both sides of the inlet and outlet 101. Door shafts 210 are provided at both ends of the first side of the valve plate 200, and each door shaft 210 is rotatably provided in the mounting cavities of the two mounting seats 230, and there is a gap between the door shaft 210 and the inner wall of the mounting cavity. The elastic mechanism 300 includes a plurality of first elastic members, and at least one first elastic member is installed on each mounting seat 230, and the first elastic member is used to provide a force to the door shaft 210 away from the door plate 100, so that the first side of the valve plate 200 moves in a direction away from the door plate 100 within the range of the floating gap.

[0057] In one embodiment, Figure 4 and Figure 5 As shown, the gate valve further includes a bearing 240, which is installed in the installation cavity, the inner ring of the bearing 240 is fixedly connected to the gate shaft 210, and the outer ring of the bearing 240 has a floating gap with the inner wall of the installation cavity; the first elastic member abuts against the outer ring of the bearing 240. In this embodiment, the bearing 420 is provided to make the gate valve work more smoothly and improve the quality of the gate valve.

[0058] In one embodiment, Figure 4 and Figure 5 As shown, each mounting seat 230 may also be provided with a mounting groove connected to the mounting cavity, and the first elastic member is a coil spring, which is arranged in the mounting groove and abuts against the outer ring of the bearing 240. In this embodiment, by providing the mounting groove, the first elastic member is more convenient to install and the performance of the first elastic member is more stable.

[0059] In this embodiment, at least one first elastic member is respectively provided in the two mounting seats 230 for mounting the valve plate 200 to ensure the balance of both ends of the valve plate 200, so that the valve plate 200 can rotate more stably and smoothly relative to the door plate 100.

[0060] As an implementable approach, Figure 1 , Figure 2 and Figure 3 As shown, the gate valve further includes a first power source 500 and a coupling 510, and the first power source 500 is flexibly connected to the door shaft 210 through the coupling 510. When the valve plate 200 rotates relative to the door plate 100, under the action of the elastic mechanism 300, the valve plate 200 moves away from the door plate 100. At this time, because the first power source 500 is flexibly connected to the door shaft 210 through the coupling 510, the damage to the first power source 500 is greatly reduced, thereby extending the life of the gate valve.

[0061] As an implementable method, the power structure includes a second power source 410 and a transmission shaft 420; the transmission shaft 420 is arranged on the door panel 100, and the pressure block 430 is arranged on the transmission shaft 420; the second power source 410 is connected to the transmission shaft 420, and the second power source 410 can drive the transmission shaft 420 to move so that the pressure block 430 can be pressed against the valve plate 200.

[0062] Among them, the second power source 410 can be a motor, a rotary cylinder, etc. to drive the transmission shaft 420 to rotate, and then drive the pressure block 430 to press on the valve plate 200. At this time, the transmission shaft 420 can be arranged parallel to the door shaft 210, or the axis of the transmission shaft 420 can be arranged at an angle to the axis of the door shaft 210. Of course, the second power source 410 can also be a cylinder or the like with the transmission shaft 420 moving axially along the door shaft 210, so that the pressure block 430 is pressed on the valve plate 200. In addition, the transmission shaft 420 can be arranged parallel to the door shaft 210, can be arranged perpendicular to the door shaft 210, or can be arranged at an angle to the door shaft 210. In this embodiment, it is preferred that the transmission shaft 420 is arranged on the door plate 100 parallel to the door shaft 210, and the second power source 410 is preferably a piston cylinder, which can greatly save the space occupied by the gate valve, so that the gate valve can be applied to more various use environments.

[0063] like Figure 6 As shown, as an implementable manner, a base 440 is provided on the door panel 100, and a mounting hole is provided on the base 440. The transmission shaft 420 is passed through the mounting hole and can slide relative to the door panel 100 along the axial direction of the door shaft 210. One end of the pressure block 430 is provided on the transmission shaft 420, and the other end is provided with a pressure surface 431. The pressure block 430 is placed on the valve plate 200 through the pressure surface 431 and moves relative to the valve plate 200.

[0064] The shape of the pressure surface 431 can be various, such as an arc surface, etc. As long as the pressure block 430 can be placed on the valve plate 200 or the force block 220 and the valve plate 200 can be pressed against the door plate 100 under the drive of the second power source 410 , it will be fine.

[0065] In this embodiment, when the second side of the valve plate 200 abuts against the door plate 100, the second power source 410 drives the transmission shaft 420 to slide relative to the door plate 100 along the axial direction of the door shaft 210. Since the pressure block 430 is provided with a pressure surface 431, the pressure surface 431 can make the pressure block 430 rest on the valve plate 200 or the force block 220 of the valve plate 200, thereby facilitating the pressure block 430 to move to the valve plate 200 and press the valve plate 200 against the door plate 100.

[0066] As an implementable manner, the valve plate 200 includes a valve plate body and a force block 220, the door shaft 210 is arranged on one side of the valve plate body (i.e., the first side of the valve plate 200), the force block 220 is arranged on the other side of the valve plate body (i.e., the second side of the valve plate 200), and the force block 220 is used to abut and cooperate with the pressure block 430. Among them, the number of the pressure block 430 and the force block 220 is at least one, and those skilled in the art can increase the number of the pressure block 430 and the force block 220 according to actual needs.

[0067] In this embodiment, when the valve plate 200 rotates relative to the door plate 100, the pressure block 430 and the force block 220 are misaligned, which will not hinder the rotation of the valve plate 200. When the inlet and outlet 101 on the door plate 100 need to be sealed, the pressure block 430 and the force block 220 abut and cooperate to press the valve plate 200 against the door plate 100. This can further reduce the space occupied by the door valve, make the position relationship of each component more reasonable, and facilitate the production of the door valve.

[0068] As an implementable approach, Figure 1 As shown, the side of the force block 220 in contact with the pressure block 430 is a limiting surface 221, and the limiting surface 221 is used to limit the distance of the pressure block 430 moving axially relative to the valve plate 200 along the transmission shaft 420. Among them, the limiting surface 221 can have various shapes, such as: an arc surface, a concave curved surface, or an L-shaped surface composed of two planes, etc., as long as it can limit the movement of the pressure block 430. Preferably, the pressure surface 431 and the limiting surface 221 are planes, and the inclination directions of the pressure surface 431 and the limiting surface 221 relative to the door panel 100 are the same, and the pressure surface 431 and the door panel 100 are at an acute angle, and the limiting surface 221 and the door panel 100 are at an obtuse angle. Preferably, the angle between the pressure surface 431 and the door panel 100 and the angle between the limiting surface 221 and the door panel 100 are complementary angles. In this embodiment, when the pressure block 430 contacts and applies pressure to the force-bearing block 220 , the limiting surface 221 can effectively prevent the second power source 410 from applying excessive pressure to cause the pressure block 430 to pass through the force-bearing block 220 .

[0069] As an implementable approach, Figure 1 As shown, the gate valve further includes a guide seat 700 and a guide shaft 600. The guide seat 700 is provided with a guide hole. The guide shaft 600 is slidably arranged in the guide hole, and the guide shaft 600 is parallel to the transmission shaft 420. The end of the pressure block 430 away from the transmission shaft 420 is connected to the guide shaft 600, and the guide shaft 600 is used to limit the movement of the pressure block 430 along the axial direction of the guide shaft 600.

[0070] In this embodiment, when the second power source 410 drives the transmission shaft 420 to move along the axial direction of the door shaft 210, the transmission shaft 420 drives the pressure block 430 to move, and the pressure block 430 further drives the guide shaft 600 to move in the guide hole on the guide seat 700. Under the dual action of the transmission shaft 420 and the guide shaft 600, the movement mode of the pressure block 430 is limited, so that the force applied by the pressure block 430 on the valve plate 200 is more reliable and stable, and the sealing performance of the gate valve is further improved.

[0071] As an implementable approach, Figure 1 As shown, two limit blocks 421 are arranged at intervals on the transmission shaft 420, and the pressure block 430 is slidably arranged on the transmission shaft 420 and is located between the two limit blocks 421. A second elastic member 422 is arranged between the pressure block 430 and one of the limit blocks 421, and the second elastic member 422 is used to adjust the moving position of the pressure block 430 along the axial direction of the transmission shaft 420, so that the pressure block 430 and the force block 220 can be abutted and matched.

[0072] The second elastic member 422 may be of various types, such as a spring sheet, a spiral spring, etc. A plurality of pairs of two spaced-apart limiting blocks 421 may be installed on the transmission shaft 420 , and the specific number of the limiting blocks 421 is determined by the number of the pressure blocks 430 .

[0073] In this embodiment, when the second power source 410 drives the transmission shaft 420 to move axially along the door shaft 210, the transmission shaft 420 drives the pressure block 430 to move and contact the valve plate 200 or the force block 220 on the valve plate 200. At this time, due to the resistance given by the valve plate 200 or the force block 220 on the valve plate 200, the pressure block 430 moves between the two limit blocks 421 and causes the second elastic member 422 to generate elastic potential energy. When the pressure block 430 and the force block 220 are worn after long-term use or the valve plate 200 and the door plate 100 collide and become deformed, etc., so that the abutment position of the pressure block 430 and the force block 220 changes, the second elastic member 422 will release elastic potential energy, and the pressure block 430 can adaptively adjust the working position under the elastic force of the second elastic member 422 to adapt to the changes such as wear or deformation of the valve plate 200, so that the pressure block 430 and the force block 220 can always be tightly abutted and matched, so that the pressure block 430 applies sufficient clamping force to the force block 220, and then the valve plate 220 can always maintain a sealed fit with the door plate 100, thereby ensuring the sealing performance of the door valve.

[0074] like Figure 6As shown, in one embodiment, an O-ring 250 may be provided on one side of the valve plate 200 close to the door plate 100. By providing the O-ring 250, the sealing performance of the valve plate 200 relative to the inlet and outlet 101 of the door plate 100 is further improved.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A gate valve, characterized in that: include: Door panels, with inlet and outlet; A valve plate, wherein a first side edge of the valve plate is rotatably disposed on the door plate, and the valve plate has a floating gap relative to the door plate, and the valve plate is used to seal or open the inlet and outlet; an elastic mechanism, disposed between the valve plate and the door plate, the elastic mechanism having an elastic force for pushing the valve plate to move in a direction away from the door plate; and A pressing mechanism is arranged on the door plate, and when the pressing mechanism abuts against the second side edge of the valve plate, the pressing mechanism presses the valve plate onto the door plate, and when the pressing mechanism separates from the second side edge of the valve plate, within the floating gap, the elastic mechanism pushes the first side edge of the valve plate to move in a direction away from the door plate; The clamping mechanism comprises: A power structure is arranged on the door panel; and A pressure block connected to the power structure, the power structure can drive the pressure block to move and abut against the valve plate, so that the valve plate is pressed against the door plate; The power structure includes a second power source and a transmission shaft; The transmission shaft is arranged on the door panel, and the pressure block is arranged on the transmission shaft; The second power source is connected to the transmission shaft, and the second power source can drive the transmission shaft to move so that the pressure block can be pressed against the valve plate; the second power source is a motor or a rotary cylinder.

2. The gate valve according to claim 1, characterized in that: The gate valve further comprises two mounting seats, each of which is provided with a mounting cavity; the two mounting seats are both provided on the gate plate and are located on both sides of the inlet and outlet; Both ends of the first side of the valve plate are provided with door shafts, each of the door shafts is rotatably arranged in the installation cavities of the two installation seats, and there is a gap between the door shaft and the inner wall of the installation cavity; The elastic mechanism includes a plurality of first elastic members, at least one of which is mounted on each mounting seat, and the first elastic member is used to provide a force to the door shaft away from the door plate so that the first side edge of the valve plate moves in a direction away from the door plate within the floating gap.

3. The gate valve according to claim 2, characterized in that: The gate valve also includes a bearing, which is installed in the installation cavity. The inner ring of the bearing is fixedly connected to the gate shaft, and the outer ring of the bearing has a floating gap with the inner wall of the installation cavity; the first elastic member abuts against the outer ring of the bearing.

4. The gate valve according to claim 2, characterized in that: The door panel is provided with a base, the base is provided with a mounting hole, the transmission shaft is passed through the mounting hole and can slide relative to the door panel along the axial direction of the door shaft; One end of the pressure block is arranged on the transmission shaft, and the other end is provided with a pressure surface. The pressure block is placed on the valve plate through the pressure surface and moves relative to the valve plate.

5. The gate valve according to claim 4, characterized in that: The valve plate comprises a valve plate body and a force-bearing block, the door shaft is arranged on one side of the valve plate body, the force-bearing block is arranged on the other side of the valve plate body, and the force-bearing block is used for abutting and cooperating with the pressure block.

6. The gate valve according to claim 5, characterized in that: A surface of the force-bearing block in contact with the pressure block is a limiting surface, and the limiting surface is used to limit the distance that the pressure block moves axially relative to the valve plate along the transmission shaft.

7. The gate valve according to claim 5, characterized in that: The gate valve also includes a guide seat and a guide shaft, the guide seat is provided with a guide hole, the guide shaft is slidably arranged in the guide hole, and the guide shaft is parallel to the transmission shaft; the end of the pressure block away from the transmission shaft is connected to the guide shaft, and the guide shaft is used to limit the movement of the pressure block along the axial direction of the guide shaft.

8. The gate valve according to claim 7, characterized in that: Two limit blocks are arranged at intervals on the transmission shaft, and the pressure block is slidably arranged on the transmission shaft and is located between the two limit blocks; a second elastic member is arranged between the pressure block and one of the limit blocks, and the second elastic member is used to adjust the axial movement position of the pressure block along the transmission shaft so that the pressure block and the force-bearing block can abut and cooperate.

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