Vacuum gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a vacuum gate valve which comprises a valve body, an empty shell is installed at the top of the valve body in an inserted mode, a through groove is formed in the bottom of the empty shell, a threaded sleeve is installed at the top of the empty shell in an inserted mode, a hand wheel is arranged at the top of the threaded sleeve, and a first screw is fixedly connected to the hand wheel in a penetrating mode. The bottom end of the first screw penetrates through the threaded sleeve and is in threaded connection with the interior of the threaded sleeve, by arranging a rotating wheel, a second screw, a nut, a push rod and an extrusion block, after the gate plate extrudes the two valve clacks and the sealing gasket to complete closure, in order to avoid the situation that the sealing performance is affected due to aging of the valve clacks and the sealing gasket, the rotating wheel can be rotated, and the rotating wheel drives the second screw to rotate; the second screw drives the nut to move downwards, the nut drives the two push rods to move, the two push rods push the corresponding extrusion blocks to move, the two extrusion blocks are used for extruding the adjacent sealing gaskets, and therefore the sealing gaskets can achieve the better sealing effect.

Description

Technical Field

[0001] The utility model relates to a gate valve, in particular to a vacuum gate valve. Background Art

[0002] The gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The vacuum gate valve is a lifting type of gate valve among many types of gate valves. It mainly plays the role of cutting off, throttling, distributing and changing the flow direction of the medium in the pipeline. The vacuum gate valve of the prior art is widely used in various fields, but it still has certain defects: most vacuum gate valves use the force on the valve stem to press the gate plate down, so that the two valve discs cooperate with the sealing gasket to achieve sealing, but after long-term use, it is difficult to continuously ensure good sealing performance. For this reason, a vacuum gate valve is proposed here. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a vacuum gate valve.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A vacuum gate valve comprises a valve body, a hollow shell is installed on the top of the valve body, a through groove is provided on the bottom of the hollow shell, and a threaded sleeve is installed on the top of the hollow shell, a hand wheel is provided on the top of the threaded sleeve, a No. 1 screw is passed through and fixedly connected to the hand wheel, the bottom end of the No. 1 screw passes through the threaded sleeve and is threadedly connected to the inside of the threaded sleeve, a gate plate is rotatably connected to the bottom end of the No. 1 screw, the gate plate is hollow, and an extrusion mechanism is provided in the inner cavity of the gate plate, the bottom of the gate plate passes through the through groove and extends to the inner cavity of the valve body, and valve flaps are attached to the left and right sides of the gate plate, and sealing gaskets are fixedly connected to the sides away from each other of the two valve flaps, and the side of the sealing gasket away from the valve flap is attached to the side of the inner wall of the through groove.

[0006] As a preferred technical solution of the utility model, the extrusion mechanism includes a No. 2 screw, the top end of the No. 2 screw penetrates the No. 1 screw and is threadedly connected to the No. 1 screw, and the outer side of the No. 2 screw is threadedly connected to a nut, and the bottom of the nut is hinged with push rods near the left and right sides, and the bottom ends of the two push rods are hinged with extrusion blocks, and the two extrusion blocks respectively penetrate the side wall of the gate and the corresponding valve disc on the far side, and fit with the corresponding sealing gasket, and the extrusion blocks are respectively movably connected to the side wall of the gate and the corresponding valve disc.

[0007] As a preferred technical solution of the utility model, a rotating wheel is fixedly connected to the top end of the No. 2 screw.

[0008] As a preferred technical solution of the utility model, a plurality of anti-skid particles are fixedly installed on both sides of the gate plate, and the outer walls of the anti-skid particles are in contact with the corresponding side walls of the valve disc.

[0009] As a preferred technical solution of the utility model, the two valve flaps are arranged in an inverted "eight" shape, and the left and right sides of the gate plate are arranged in an inclined surface.

[0010] As a preferred technical solution of the utility model, the two extrusion blocks are arranged bilaterally symmetrically with the central axis of the hollow shell as the axis of symmetry.

[0011] The embodiment of the utility model provides a vacuum gate valve, which has the following beneficial effects:

[0012] By providing a rotating wheel, a No. 2 screw, a nut, a push rod and an extrusion block, after the gate plate squeezes the two valve discs and the sealing gasket to complete the flow cutoff, in order to avoid aging of the valve discs and the sealing gasket and affecting the sealing performance, the rotating wheel can be rotated to make the rotating wheel drive the No. 2 screw to rotate, the No. 2 screw drives the nut to move downward, the nut drives the two push rods to move, the two push rods respectively push the corresponding extrusion blocks to move, and the two extrusion blocks are used to squeeze the adjacent sealing gaskets, so that the sealing gaskets can have a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the external structure of the utility model at one angle;

[0015] Figure 2 It is a schematic diagram of the external structure of the utility model from another angle;

[0016] Figure 3 It is a schematic diagram of the front cross-sectional structure of the utility model;

[0017] Figure 4 This utility model Figure 3 Schematic diagram of the local structure in.

[0018] In the figure: 1. valve body; 2. empty shell; 3. valve disc; 4. gate; 5. anti-skid particles; 6. through groove; 7. sealing gasket; 8. threaded sleeve; 9. No. 1 screw; 10. hand wheel; 11. rotating wheel; 12. No. 2 screw; 13. nut; 14. push rod; 15. extrusion block. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] Example: Figure 1-4 As shown, a vacuum gate valve comprises a valve body 1, a hollow shell 2 is installed on the top of the valve body 1, a through groove 6 is provided on the bottom of the hollow shell 2, and a threaded sleeve 8 is installed on the top of the hollow shell 2, a hand wheel 10 is provided on the top of the threaded sleeve 8, a No. 1 screw 9 is passed through and fixedly connected to the hand wheel 10, the bottom end of the No. 1 screw 9 passes through the threaded sleeve 8 and is threadedly connected to the inside of the threaded sleeve 8, a gate plate 4 is rotatably connected to the bottom end of the No. 1 screw 9, the gate plate 4 is hollow, and an extrusion mechanism is provided in the inner cavity of the gate plate 4, the bottom of the gate plate 4 passes through the through groove 6 and extends to the inner cavity of the valve body 1, and valve flaps 3 are attached to the left and right sides of the gate plate 4, and sealing gaskets 7 are fixedly connected to the sides away from each other of the two valve flaps 3, and the side of the sealing gasket 7 away from the valve flap 3 is attached to the side of the inner wall of the through groove 6.

[0021] The extrusion mechanism includes a No. 2 screw 12, the top of which penetrates the No. 1 screw 9 and is threadedly connected to the No. 1 screw 9, and a nut 13 is threadedly connected to the outer side of the No. 2 screw 12, and a push rod 14 is hinged at the bottom of the nut 13 near the left and right sides, and an extrusion block 15 is hinged at the bottom of the two push rods 14, and the two extrusion blocks 15 penetrate the side wall of the gate plate 4 and the corresponding valve disc 3 on the far side, and fit with the corresponding sealing gasket 7, and the extrusion blocks 15 are movably connected to the side wall of the gate plate 4 and the corresponding valve disc 3, respectively, and the two extrusion blocks 15 are symmetrically arranged with the central axis of the empty shell 2 as the symmetry axis;

[0022] In this embodiment, through this arrangement, the movable extrusion block 15 can be used to extrude the adjacent sealing gaskets 7, so that the sealing gaskets 7 can achieve a better sealing effect.

[0023] The top of the second screw rod 12 is fixedly connected with a rotating wheel 11;

[0024] In this embodiment, this arrangement enables the No. 2 screw 12 to be rotated more conveniently to perform subsequent work.

[0025] Among them, a number of anti-skid particles 5 are fixedly installed on both sides of the gate plate 4, and the outer wall of the anti-skid particles 5 fits with the side wall of the corresponding valve disc 3;

[0026] In this embodiment, the friction between the gate plate 4 and the valve disc 3 is increased through this arrangement, and the gate plate 4 can better push the valve disc 3 to achieve a subsequent sealing effect.

[0027] The two valve flaps 3 are arranged in an inverted "eight" shape, and the left and right sides of the gate plate 4 are arranged in an inclined surface;

[0028] In this embodiment, this arrangement enables the gate plate 4 to cooperate with the valve flap 3 to better perform subsequent work.

[0029] Working principle: When in use, first connect the two sides of the valve body 1 with the external pipeline. When the medium flows inside the valve body 1, the medium will flow to the other side along the through groove 6. When it is necessary to intercept the flow, the hand wheel 10 can be turned to make the hand wheel 10 drive the No. 1 screw 9 to rotate. The No. 1 screw 9 pushes the gate plate 4 downward under the action of the threaded sleeve 8 to move, and the inclined surfaces on the left and right sides of the gate plate 4 are used to push the corresponding valve disc 3 to move, and the valve disc 3 drives the corresponding outer sealing gasket 7 to move. After the movement of the valve disc 3 and the sealing gasket 7, the sealing operation of the inside of the through groove 6 is realized, and the interception is further realized. In the follow-up, in order to avoid aging of the valve disc 3 and the sealing gasket 7 and affect the sealing performance, the rotating wheel 11 can be rotated to make the rotating wheel 11 drive the No. 2 screw 12 to rotate, and the No. 2 screw 12 drives the nut 13 to move downward, and the nut 13 drives the two push rods 14 to move. The two push rods 14 respectively push the corresponding extrusion blocks 15 to move, and the two extrusion blocks 15 are used to extrude the adjacent sealing gaskets 7, so that the sealing gaskets 7 can have a better sealing effect.

[0030] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vacuum gate valve, comprising a valve body (1), characterized in that: A hollow shell (2) is inserted and installed on the top of the valve body (1), a through groove (6) is provided on the bottom of the hollow shell (2), and a threaded sleeve (8) is inserted and installed on the top of the hollow shell (2). A hand wheel (10) is provided on the top of the threaded sleeve (8). A No. 1 screw rod (9) is passed through and fixedly connected to the hand wheel (10). The bottom end of the No. 1 screw rod (9) passes through the threaded sleeve (8) and is threadedly connected to the inside of the threaded sleeve (8). A gate plate (4) is rotatably connected to the bottom end of the No. 1 screw rod (9). The gate plate (4) is hollow, and an extrusion mechanism is provided in the inner cavity of the gate plate (4). The bottom of the gate plate (4) passes through the through groove (6) and extends to the inner cavity of the valve body (1). Valve flaps (3) are attached to the left and right sides of the gate plate (4). The two valve flaps (3) are fixedly connected to sealing gaskets (7) on the sides away from each other, and the side of the sealing gasket (7) away from the valve flap (3) is attached to the inner wall of the through groove (6).

2. A vacuum gate valve according to claim 1, characterized in that: The extrusion mechanism comprises a No. 2 screw (12), the top end of the No. 2 screw (12) passes through the No. 1 screw (9) and is threadedly connected to the No. 1 screw (9), and the outer side of the No. 2 screw (12) is threadedly connected to a nut (13), and the bottom of the nut (13) is hinged with a push rod (14) near the left and right sides, and the bottom ends of the two push rods (14) are hinged with an extrusion block (15), and the two extrusion blocks (15) respectively pass through the side wall of the gate plate (4) and the corresponding valve disc (3) on the side away from each other, and fit with the corresponding sealing gasket (7), and the extrusion blocks (15) are respectively movably connected to the side wall of the gate plate (4) and the corresponding valve disc (3).

3. A vacuum gate valve according to claim 2, characterized in that: The top end of the No. 2 screw rod (12) is fixedly connected to a rotating wheel (11).

4. A vacuum gate valve according to claim 1, characterized in that: A plurality of anti-skid particles (5) are fixedly mounted on both left and right sides of the gate plate (4), and the outer walls of the anti-skid particles (5) are in contact with the side walls of the corresponding valve flap (3).

5. A vacuum gate valve according to claim 1, characterized in that: The two valve flaps (3) are arranged in an inverted "eight" shape, and the left and right sides of the gate plate (4) are both arranged in an inclined surface.

6. A vacuum gate valve according to claim 2, characterized in that: The two extrusion blocks (15) are arranged bilaterally symmetrically with the central axis of the hollow shell (2) as the symmetry axis.

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