CN212928800U - Door valve - Google Patents

Abstract

The utility model relates to a door valve. The door valve includes a door panel having an access opening; the first side edge of the valve plate is rotatably arranged on the door plate, and the valve plate has a floating gap relative to the door plate; the elastic mechanism is arranged between the valve plate and the door plate and has elastic force for pushing the valve plate to move towards the direction far away from the door plate; and the pressing mechanism is arranged on the door plate, and when the pressing mechanism is abutted against the second side edge of the valve plate, the pressing mechanism presses the valve plate on the door plate. The utility model discloses a door valve, it is provided with elastic mechanism between valve plate and door plant, and elastic mechanism can strut the first side and the door plant of valve plate for the rotation department of valve plate and door plant has the clearance of floating, thereby is difficult to wearing and tearing when making the valve plate rotate for the door plant. And the valve plate can be tightly pressed on the door plate by utilizing the pressing mechanism, so that the sealing property of the door valve is ensured.

Description

Door valve

Technical Field

The utility model relates to a cutting device technical field especially relates to a gate valve.

Background

In the production process, there are high demands on the sealing performance of the production line, and a gate valve is usually arranged at an inlet and an outlet of the production line. The traditional door valve comprises a door plate and a valve plate, wherein the door plate is assembled with the edge of an inlet and an outlet of a production line in a sealing mode, an inlet and an outlet are formed in the door plate, the valve plate is arranged on the door plate in a rotating mode, and the inlet and the outlet in the door plate are sealed or opened through the valve plate. In order to ensure the sealing performance of the traditional door valve, the door plate and the valve plate are required to be tightly attached, and in the mass production process, the valve plate is required to frequently move relative to the door plate to seal or open an inlet and an outlet on the door plate, so that the traditional door valve is easy to wear in the use process and poor in sealing performance.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a gate valve in order to solve the problem that the conventional gate valve is easily worn during use and thus has poor sealing performance.

The above purpose is realized by the following technical scheme:

a gate valve, comprising:

a door panel having an access opening;

the first side edge of the valve plate is rotatably arranged on the door plate, the valve plate has a floating gap relative to the door plate, and the valve plate is used for sealing or opening the inlet and the outlet;

the elastic mechanism is arranged between the valve plate and the door plate and has elastic force for pushing the valve plate to move towards the direction far away from the door plate; and

the pressing mechanism is arranged on the door plate, when the pressing mechanism is abutted against the second side edge of the valve plate, the pressing mechanism presses the valve plate on the door plate, and when the pressing mechanism is separated from the second side edge of the valve plate, the elastic mechanism pushes the first side edge of the valve plate to move towards the direction far away from the door plate in the floating clearance range.

In one embodiment, the gate valve further comprises two mounting seats, each mounting seat having a mounting cavity disposed thereon; the two mounting seats are arranged on the door plate and positioned at two sides of the inlet and the outlet;

two ends of the first side edge of the valve plate are respectively provided with a door shaft, each door shaft is respectively and rotatably arranged in the mounting cavities of the two mounting seats, and a gap is formed between each door shaft and the inner wall of each mounting cavity; the elastic mechanism comprises a plurality of first elastic pieces, at least one first elastic piece is arranged on each mounting seat, and the first elastic pieces are used for providing acting force far away from the door plate for the door shaft, so that the first side edge of the valve plate moves towards the direction far away from the door plate within the floating gap range.

In one embodiment, the gate valve further comprises a bearing, the bearing is arranged in the mounting cavity, an inner ring of the bearing is fixedly connected with the gate shaft, and an outer ring of the bearing has a floating gap with the inner wall of the mounting cavity; the first elastic member abuts against an outer ring of the bearing.

In one embodiment, the pressing mechanism comprises:

the power structure is arranged on the door panel; and

the pressurizing block is connected with the power structure, and the power structure can drive the pressurizing block to move and abut against the valve plate so that the valve plate is pressed on the door plate.

In one embodiment, the power structure includes a secondary power source and a drive shaft; the transmission shaft is arranged on the door plate, and the pressurizing block is arranged on the transmission shaft; the second power source is connected with the transmission shaft, and the second power source can drive the transmission shaft to move, so that the pressurizing block can be pressed on the valve plate.

In one embodiment, a base is arranged on the door plate, a mounting hole is formed in the base, and the transmission shaft penetrates through the mounting hole and can slide relative to the door plate along the axial direction of the door shaft; one end of the pressurizing block is arranged on the transmission shaft, the other end of the pressurizing block is provided with a pressurizing surface, and the pressurizing block is overlapped with the valve plate through the pressurizing surface and moves relative to the valve plate.

In one embodiment, the valve plate comprises a valve plate body and a stress block, the door shaft is arranged on one side edge of the valve plate body, the stress block is arranged on the other side edge of the valve plate body, and the stress block is used for being abutted and matched with the pressurizing block.

In one embodiment, one surface of the force bearing block, which is in contact with the pressurizing block, is a limiting surface, and the limiting surface is used for limiting the axial movement distance of the pressurizing block relative to the valve plate along the transmission shaft.

In one embodiment, the gate valve further comprises a guide seat and a guide shaft, wherein 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;

one end of the pressurizing block, which is far away from the transmission shaft, is connected with the guide shaft, and the guide shaft is used for limiting the pressurizing block to move along the axial direction of the guide shaft.

In one embodiment, two limit blocks are arranged on the transmission shaft at intervals, and the pressurizing block is arranged on the transmission shaft in a sliding manner and is positioned between the two limit blocks; and a second elastic piece is arranged between the pressurizing block and one of the limiting blocks and used for adjusting the axial moving position of the pressurizing block along the transmission shaft, so that the pressurizing block and the stress block can be abutted and matched.

The gate valve has at least the following technical effects:

the utility model discloses a door valve, it is provided with elastic mechanism between valve plate and door plant, and elastic mechanism can strut the first side and the door plant of valve plate for the rotation department of valve plate and door plant has the clearance of floating. When the second side edge of the valve plate is abutted against the valve plate, the pressing mechanism presses the valve plate on the door plate and seals the inlet and the outlet on the door plate. When the second side of valve plate and door plant separation, the first side of valve plate moves towards the direction of keeping away from the door plant under the effect of elastic mechanism, therefore the valve plate is difficult to wear and tear when rotating for the door plant. The utility model discloses a gate valve not only can greatly reduce the wearing and tearing of gate valve in the use, can also guarantee the leakproofness of gate valve simultaneously.

Drawings

FIG. 1 is a schematic structural view of a gate valve according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of FIG. 1 from another perspective;

FIG. 3 is a front view in the direction S of the structure shown in FIG. 1;

FIG. 4 is a schematic view A-A of the structure shown in FIG. 3;

FIG. 5 is a schematic view B-B of the structure depicted in FIG. 3;

fig. 6 is a schematic view of the internal structure of the gate valve provided in this embodiment.

Wherein:

100-a door panel;

101-import and export;

200-a valve plate;

210-a door spindle; 220-a force-bearing block; 221-a limiting surface;

230-a mounting seat; 240-a bearing; a 250-O-shaped ring;

300-a resilient mechanism;

400-a hold-down mechanism;

410-a second power source;

420-a drive shaft; 421-a limiting block; 422-a second elastic member;

430-pressing block; 431-a pressing surface; 440-a base;

500-a first power source;

510-a coupling;

600-a guide shaft;

700-guide seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the valve of the present invention is further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 4, a gate valve according to an embodiment of the present invention includes: door panel 100, valve plate 200, resilient mechanism 300, and hold-down mechanism 400. Door panel 100 has an access opening 101. A first side of the valve plate 200 is rotatably disposed on the door panel 100, and the valve plate 200 has a floating clearance with respect to the door panel 100, and the valve plate 200 is used to seal or open the inlet and outlet 101. The elastic mechanism 300 is disposed between the valve plate 200 and the door plate 100, and the elastic mechanism 300 has an elastic force urging the valve plate 200 to move in a direction away from the door plate 100. The pressing mechanism 400 is disposed on the door plate 100, when the pressing mechanism 40 abuts against the second side edge of the valve plate 200, the pressing mechanism 400 presses the valve plate 200 against the door plate 100, and when the pressing 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 in a direction away from the door plate 100 within the floating gap range.

The valve plate 200 may be rotatably disposed on the door panel 100 in various forms, for example: two strip-shaped supports are arranged on the door panel 100 at two ends of the inlet and outlet 101 at intervals, a waist-shaped hole is arranged on each strip-shaped support, and the length direction of each waist-shaped hole is perpendicular to the door panel 100; the valve plate 200 is provided with a rotating shaft, the rotating shaft is sleeved with a shaft sleeve, the outer peripheral surface of the shaft sleeve is symmetrically provided with sliding rods, and the sliding rods penetrate through waist-shaped holes of the elongated brackets. An elastic mechanism 300, described below, is disposed between the two elongated brackets to urge the sleeve to move within the kidney-shaped aperture.

The elastic mechanism 300 may be constructed in various forms. For example, the elastic mechanism 300 may be a spring plate, a coil spring, or other elastic material, as long as it can exert an elastic action. The number of the elastic mechanisms 300 is at least one, and those skilled in the art can set the number of the elastic mechanisms 300 according to actual requirements.

The structure of the hold-down mechanism 400 may take many forms. For example, the pressing mechanism 400 includes a hand wheel, a threaded column and a pressing plate, the hand wheel is disposed at one end of the threaded column, the pressing plate is provided with a mounting hole, and the threaded column is inserted into the mounting hole and can be matched with a nut disposed on the door panel 100; one end of the pressing plate is rotatably connected to the door plate 100, and the other end is abutted to the valve plate 200. When the inlet and outlet 101 on the door plate 100 needs to be sealed, the pressing plate is rotated to enable the valve plate 200 to abut against the pressing plate, the threaded column is inserted into the nut at the moment, the threaded column is screwed into the nut through the hand wheel, and meanwhile, the pressing plate is pressed through the hand wheel, so that the valve plate 200 is pressed through the door plate 100.

Of course, the hold-down mechanism 400 may also be an automated device, and in one embodiment, the hold-down mechanism 400 includes a powered structure and a compression block 430. The power structure sets up on door plant 100, and pressurization piece 430 is connected with the power structure, and the power structure can drive pressurization piece 430 motion and with valve plate 200 butt to make valve plate 200 compress tightly on door plant 100. The power structure may be a motor, the motor is fixed on the door plate 100, the pressurizing block 430 is arranged on an output shaft of the motor, and the motor drives the pressurizing block 430 to rotate so as to be pressed on the valve plate 200. Of course, the motor may be replaced with another power source capable of rotating the pressurizing block 430 and pressing the valve plate 200.

In addition, in the above example, the power structure may include two telescopic cylinders. The door plate 100 is vertically provided with a mounting plate, one end of a first telescopic cylinder is arranged on the mounting plate, the other end of the first telescopic cylinder is connected with one end of a second telescopic cylinder, and the pressurizing block 430 is arranged at the other end of the second telescopic cylinder. When the inlet and outlet 101 on the door plate 100 needs to be sealed, the first telescopic cylinder drives the second telescopic cylinder to move, and the second telescopic cylinder drives the pressurizing block 430 to move and press the valve plate 200. In this way, valve plate 200 can be pressed when valve plate 200 seals inlet/outlet 101 in door panel 100 without interfering with the relative rotation of valve plate 200 with respect to door panel 100.

The utility model discloses gate valve, it is provided with elastic mechanism 300 between valve plate 200 and door plant 100, and elastic mechanism 300 can strut the first side of valve plate 200 and door plant 100 for the rotation department of valve plate 200 and door plant 100 has the clearance of floating. When the second side of valve plate 200 abuts valve plate 200, pressing mechanism 400 presses valve plate 200 against door plate 100 and seals inlet/outlet 110 in 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 with respect to the door plate 100 by the elastic mechanism. The utility model discloses a gate valve not only can greatly reduce the wearing and tearing of gate valve in the use, can also guarantee the leakproofness of gate valve simultaneously.

As shown in fig. 3 to 5, as a practicable manner, the gate valve further includes two mounting seats 230, each of the mounting seats 230 having a mounting cavity provided thereon; the two mounting seats 230 are disposed on the door panel 100 and located at two sides of the inlet and outlet 101. Both ends of the first side of valve plate 200 all are provided with door-hinge 210, and every door-hinge 210 rotates respectively and sets up in the installation cavity of two mount pads 230, and door-hinge 210 and installation cavity inner wall have the clearance. The elastic mechanism 300 includes a plurality of first elastic members, and at least one first elastic member is mounted on each mounting seat 230, and the first elastic members are used for providing a force to the door shaft 210 away from the door plate 100, so that the first side edge of the valve plate 200 moves in a direction away from the door plate 100 within the floating gap range.

In one embodiment, as shown in fig. 4 and 5, the gate valve further includes a bearing 240, the bearing 240 is installed in the installation cavity, an inner ring of the bearing 240 is fixedly connected with the gate shaft 210, and an outer ring of the bearing 240 has a floating gap with an 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 operation of the gate valve smoother and improve the quality of the gate valve.

In one embodiment, as shown in fig. 4 and 5, each of the mounting seats 230 may further have a mounting groove communicating with the mounting cavity, and the first elastic member is a coil spring disposed in the mounting groove and abutting against the outer ring of the bearing 240. Through setting up the mounting groove in this embodiment for first elastic component installation is more convenient, also makes the performance of first elastic component more stable.

In this embodiment, at least one first elastic member is respectively disposed in two mounting seats 230 for mounting valve plate 200, so as to ensure the balance of two ends of valve plate 200, and thus, valve plate 200 can be more stable and rotate more smoothly in the process of rotating relative to door plate 100.

As one practical way, as shown in fig. 1, 2 and 3, the door valve further includes a first power source 500 and a coupling 510, the first power source 500 being flexibly connected to the door shaft 210 by the coupling 510. When the valve plate 200 rotates relative to the door panel 100, the valve plate 200 moves in a direction away from the door panel 100 under the action of the elastic mechanism 300, and at this time, the first power source 500 is flexibly connected with the door shaft 210 through the coupler 510, so that the damage to the first power source 500 is greatly reduced, and the service life of the gate valve is prolonged.

As a practical manner, the power structure includes a secondary power source 410 and a transmission shaft 420; the transmission shaft 420 is disposed on the door panel 100, and the pressurizing block 430 is disposed on the transmission shaft 420; the second power source 410 is connected to the driving shaft 420, and the driving shaft 420 is driven by the second power source 410 to move, so that the pressurizing block 430 can be pressed against the valve plate 200.

The second power source 410 may be a motor, a rotary cylinder, or the like, to drive the transmission shaft 420 to rotate, and further to drive the pressurizing block 430 to compress on the valve plate 200, at this time, the transmission shaft 420 may be parallel to the door shaft 210, or the axis of the transmission shaft 420 and the axis of the door shaft 210 may form an included angle. Of course, the second power source 410 may be a cylinder or the like with a transmission shaft 420 axially moving along the door shaft 210 so as to press the pressurizing block 430 against the valve plate 200. In addition, the transmission shaft 420 may be disposed parallel to the door shaft 210, may be disposed perpendicular to the door shaft 210, or may be disposed at an angle to the door shaft 210. In the present embodiment, it is preferable that the driving shaft 420 is disposed on the door panel 100 in parallel to the door shaft 210, and it is preferable that the second power source 410 is a piston cylinder, so that the occupied space of the door valve can be greatly saved, and the door valve can be applied to more various use environments.

As shown in fig. 6, as an implementation manner, a base 440 is disposed on the door panel 100, a mounting hole is disposed on the base 440, and the transmission shaft 420 is inserted into 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 pressurizing block 430 is disposed on the driving shaft 420, and the other end is provided with a pressurizing surface 431, and the pressurizing block 430 overlaps the valve plate 200 through the pressurizing surface 431 and moves relative to the valve plate 200.

The shape of the pressing surface 431 may be various. For example: a cambered surface, etc. It is sufficient that pressurizing block 430 can be made to overlap valve plate 200 or force receiving block 220, and valve plate 200 can be pressed against door panel 100 by the drive of second power source 410.

In the present 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, and since the pressurizing block 430 is provided with the pressurizing surface 431, the pressurizing surface 431 can enable the pressurizing block 430 to be lapped on the valve plate 200 or the stressed block 220 of the valve plate 200, so that the pressurizing block 430 can move to the valve plate 200 and press the valve plate 200 on the door plate 100.

As an implementation manner, the valve plate 200 includes a valve plate body and a force-receiving block 220, the door shaft 210 is disposed on one side of the valve plate body (i.e., a first side of the valve plate 200), the force-receiving block 220 is disposed on the other side of the valve plate body (i.e., a second side of the valve plate 200), and the force-receiving block 220 is configured to be in abutting engagement with the pressure-applying block 430. The number of the pressurizing blocks 430 and the force-receiving blocks 220 is at least one, and those skilled in the art can increase the number of the pressurizing blocks 430 and the force-receiving blocks 220 according to actual needs.

In the present embodiment, when the valve plate 200 rotates relative to the door panel 100, the pressurizing block 430 is misaligned with the force receiving block 220, and does not interfere with the rotation of the valve plate 200. When the inlet and outlet 101 of the door panel 100 needs to be sealed, the pressurizing block 430 is abutted and matched with the force-bearing block 220, and the valve plate 200 is pressed on the door panel 100. Therefore, the occupied space of the gate valve can be further reduced, the position relation of each part is more reasonable, and the production and the manufacture of the gate valve are facilitated.

As an implementation manner, as shown in fig. 1, a surface of the force-receiving block 220 contacting the pressurizing block 430 is a limiting surface 221, and the limiting surface 221 is used for limiting a distance of the pressurizing block 430 moving axially along the transmission shaft 420 relative to the valve plate 200. The shape of the limiting surface 221 may be various, such as: a curved surface, a concave curved surface, or an L-shaped surface formed by two planes, etc., as long as it can limit the movement of the pressurizing block 430. Preferably, the pressing surface 431 and the limiting surface 221 are planes, the pressing surface 431 and the limiting surface 221 have the same inclination direction with respect to the door panel 100, the pressing surface 431 forms an acute angle with the door panel 100, and the limiting surface 221 forms an obtuse angle with the door panel 100. Preferably, the angle between the pressing surface 431 and the door panel 100 is complementary to the angle between the limiting surface 221 and the door panel 100. In this embodiment, when the pressing block 430 contacts and applies pressure to the force-receiving block 220, the limiting surface 221 can effectively prevent the pressing block 430 from sliding over the force-receiving block 220 due to the excessive pressure applied by the second power source 410.

As an implementation manner, as shown in fig. 1, 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 disposed in the guide hole, and the guide shaft 600 is parallel to the transmission shaft 420. The end of the pressurizing block 430 away from the transmission shaft 420 is connected to a guide shaft 600, and the guide shaft 600 is used for limiting the pressurizing block 430 to move along the axial direction of the guide shaft 600.

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 pressing block 430 to move, and the pressing block 430 further drives the guide shaft 600 to move in the guide hole of the guide base 700. Under the dual actions of the transmission shaft 420 and the guide shaft 600, the movement mode of the pressurizing block 430 is limited, so that the force exerted by the pressurizing block 430 on the valve plate 200 is more reliable and stable, and the sealing performance of the door valve is further improved.

As an implementation manner, as shown in fig. 1, two limit blocks 421 are disposed on the transmission shaft 420 at intervals, and the pressurizing block 430 is slidably disposed on the transmission shaft 420 and located between the two limit blocks 421. A second elastic member 422 is arranged between the pressurizing block 430 and one of the limiting blocks 421, and the second elastic member 422 is used for adjusting the moving position of the pressurizing block 430 along the axial direction of the transmission shaft 420, so that the pressurizing block 430 can be abutted and matched with the force-bearing block 220.

Among them, the second elastic member 422 may be various in kind. For example: leaf springs, coil springs, and the like. A plurality of pairs of two stoppers 421 spaced apart from each other may be mounted on the transmission shaft 420, and the number of the stoppers 421 is determined by the number of the pressing blocks 430.

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 pressurizing block 430 to move and contact with the valve plate 200 or the force-receiving block 220 on the valve plate 200, and at this time, the pressurizing block 430 moves between the two limit blocks 421 due to the resistance given by the force-receiving block 220 on the valve plate 200 or the valve plate 200, and the second elastic member 422 generates elastic potential energy. When the pressurizing block 430 and the force-bearing block 220 are worn after long-term use or the valve plate 200 and the door plate 100 collide to deform, and the like, so that the abutting positions of the pressurizing block 430 and the force-bearing block 220 are changed, the second elastic piece 422 can release elastic potential energy, the pressurizing block 430 can self-adaptively adjust the working position under the elastic force action of the second elastic piece 422 to adapt to the changes of the wear or deformation, and the like of the valve plate 200, so that the pressurizing block 430 and the force-bearing block 220 can be always in tight abutting fit, the pressurizing block 430 applies enough pressing force to the force-bearing block 220, the valve plate 220 can always keep in sealing fit with the door plate 100, and the sealing performance of the door valve is ensured.

As shown in FIG. 6, in one embodiment, an O-ring 250 may also be disposed on a side of valve plate 200 adjacent door panel 100. By providing the O-ring 250, the sealing performance of the valve plate 200 with respect to the inlet/outlet 101 of the door panel 100 is further improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A gate valve, comprising:

a door panel having an access opening;

the first side edge of the valve plate is rotatably arranged on the door plate, the valve plate has a floating gap relative to the door plate, and the valve plate is used for sealing or opening the inlet and the outlet;

the elastic mechanism is arranged between the valve plate and the door plate and has elastic force for pushing the valve plate to move towards the direction far away from the door plate; and

the pressing mechanism is arranged on the door plate, when the pressing mechanism is abutted against the second side edge of the valve plate, the pressing mechanism compresses the valve plate on the door plate, and when the pressing mechanism is separated from the second side edge of the valve plate, the elastic mechanism pushes the first side edge of the valve plate to move towards the direction far away from the door plate in the floating clearance range.

2. The gate valve of claim 1 further including two mounts, each mount having a mounting cavity disposed thereon; the two mounting seats are arranged on the door plate and are positioned on two sides of the inlet and the outlet;

two ends of the first side edge of the valve plate are respectively provided with a door shaft, each door shaft is respectively and rotatably arranged in the mounting cavities of the two mounting seats, and a gap is formed between each door shaft and the inner wall of each mounting cavity;

the elastic mechanism comprises a plurality of first elastic pieces, at least one first elastic piece is installed on each installation seat, and the first elastic pieces are used for providing acting force far away from the door plate for the door shaft, so that the first side edge of the valve plate moves in the direction far away from the door plate in the floating gap range.

3. The gate valve of claim 2, further comprising a bearing mounted within the mounting cavity, an inner race of the bearing fixedly coupled to the gate shaft, an outer race of the bearing having the floating gap with the mounting cavity inner wall; the first elastic member abuts against an outer ring of the bearing.

4. The gate valve of claim 2 or 3, wherein the hold down mechanism comprises:

the power structure is arranged on the door panel; and

the pressurizing block is connected with the power structure, and the power structure can drive the pressurizing block to move and abut against the valve plate, so that the valve plate is pressed on the door plate.

5. The gate valve of claim 4, with the motive structure including a secondary power source and a drive shaft;

the transmission shaft is arranged on the door panel, and the pressurizing block is arranged on the transmission shaft;

the second power source is connected with the transmission shaft, and the second power source can drive the transmission shaft to move, so that the pressurizing block can be tightly pressed on the valve plate.

6. The door valve of claim 5, wherein the door plate is provided with a base, the base is provided with a mounting hole, and the transmission shaft is arranged in the mounting hole in a penetrating way and can slide relative to the door plate along the axial direction of the door shaft;

one end of the pressurizing block is arranged on the transmission shaft, the other end of the pressurizing block is provided with a pressurizing surface, and the pressurizing block is arranged on the valve plate through the pressurizing surface and moves relative to the valve plate.

7. The door valve of claim 6, wherein the valve plate includes a plate body and a force block, the door shaft being disposed on one side of the plate body, the force block being disposed on another side of the plate body, the force block being adapted for abutting engagement with the pressure block.

8. The gate valve of claim 7, wherein a face of the force-receiving block in contact with the pressure block is a stop face for limiting a distance the pressure block moves axially along the drive shaft relative to the valve plate.

9. The gate valve of claim 6, further comprising a guide block having a guide bore and a guide shaft slidably disposed within the guide bore, the guide shaft being parallel to the drive shaft; one end of the pressurizing block, which is far away from the transmission shaft, is connected with the guide shaft, and the guide shaft is used for limiting the pressurizing block to move along the axial direction of the guide shaft.

10. The door valve as claimed in claim 7, wherein two stoppers are spaced apart from each other on the transmission shaft, and the pressurizing block is slidably disposed on the transmission shaft and between the stoppers; and a second elastic piece is arranged between the pressurizing block and one of the limiting blocks and used for adjusting the axial moving position of the pressurizing block along the transmission shaft, so that the pressurizing block and the stressed block can be abutted and matched.

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