A gate valve

Abstract

The utility model discloses a gate valve, comprising: a valve body, an air pipe, a gasket and a lifting drive mechanism, wherein the valve body is arranged in the guide rails on both sides of the water channel flow channel, and the top of the valve body is connected to the lifting drive mechanism; the gasket is arranged on the side of the valve body along the height direction of the valve body, and a cavity is arranged inside the gasket, and the cavity is connected to the inflatable component through the air pipe; when the lifting drive mechanism drives the valve body to descend to a preset position along the guide rail, gas is filled in the cavity, the gasket is raised, and is tightly fitted with the guide rail, so as to achieve sealing and blocking of the water channel flow channel; when the gas in the cavity is discharged, the gasket shrinks and is separated from the guide rail, and the lifting drive mechanism drives the valve body to rise to the preset position along the guide rail, so as to achieve conduction of the water channel flow channel. The utility model has the advantages of compact structure, convenient disassembly and assembly, high reliability, good sealing and low cost, and solves the problem that the gaskets on both sides of the gate valve are caused by friction generated when the valve is opened or closed, so that a gap is generated between the gasket and the guide rail, causing leakage.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a plug-in valve. Background Art

[0002] Some factories face the problem of rainwater discharge within the factory, so they often set up rainwater collection pools and set up gate valves on the canals to control the opening and closing of the canals. With the operation of opening and closing the gates, the gate valve needs to rise or fall at irregular intervals according to the instructions, which causes the two sides of the valve body to constantly rub against the guide rails, and eventually causes a gap between the gasket and the guide rail, destroying the original seal and leaking rainwater or sewage. On the one hand, it is not conducive to the control of water flow, and on the other hand, it does not meet environmental protection requirements and there is a risk of pollution.

[0003] When a leak occurs, the general approach is to remove the valve body as a whole and replace the new gasket. When stable operation needs to be ensured, it is very difficult to replace the gasket for the heavy valve body, and it needs to be replaced again after a short period of use. This leads to the need for frequent replacement, which is not only time-consuming and labor-intensive, but also not conducive to the control of the water channel. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem that the gaskets on both sides of the gate valve are caused by friction each time the valve is opened or closed, which causes a gap between the gasket and the guide rail and causes leakage, and to provide a gate valve with compact structure, convenient disassembly and assembly, high reliability, good sealing and low cost.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A gate valve comprises: a valve body, an air pipe, a gasket and a lifting drive mechanism, wherein the valve body spans within guide rails on both sides of a water channel flow path, and the top of the valve body is connected to the lifting drive mechanism; the gasket is arranged on the side of the valve body along the height direction of the valve body, and a cavity is arranged inside the gasket, and the cavity is connected to an external inflation component through the air pipe; when the lifting drive mechanism drives the valve body to descend to a preset position along the guide rail, gas is filled into the cavity, the gasket protrudes, and fits tightly with the guide rail to achieve sealing and blocking of the water channel flow path; when the gas in the cavity is discharged, the gasket contracts and detaches from the guide rail, and the lifting drive mechanism drives the valve body to rise to a preset position along the guide rail to achieve conduction of the water channel flow path.

[0007] As a further improvement of the present invention, after the gas in the cavity is discharged, a gap of 2 to 3 mm exists between the gasket and the guide rail.

[0008] As a further improvement of the utility model, the gasket is in a "concave"-shaped structure, with clamping strips symmetrically provided on both sides of the gasket, and a plurality of bolt holes evenly distributed on the clamping strips; the side of the valve body is wrapped with the clamping strips, and screws are screwed into the bolt holes and the side of the valve body to achieve sealing of the side of the valve body wrapped around the inner side of the gasket.

[0009] As a further improvement of the utility model, a control valve is provided on the air pipe, and the air pipe is connected to the inflation component through an inflation interface.

[0010] As a further improvement of the utility model, the inflation component includes an inflation device and a connecting pipe with a pressure gauge, one end of the connecting pipe is connected to the inflation device, and the other end of the connecting pipe is connected to the trachea through an inflation interface.

[0011] As a further improvement of the utility model, the control valve includes a first manual valve, a stop valve and a second manual valve which are arranged in sequence.

[0012] As a further improvement of the utility model, the inflation device is an air pump or an air pump.

[0013] As a further improvement of the utility model, the lifting drive mechanism includes an electric actuator and a screw, one end of the screw is connected to the top of the valve body, and the other end of the screw is connected to the output end of the electric actuator. Driven by the electric actuator, the screw rotates to drive the valve body to lift and reciprocate along the guide rail.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The utility model of the gate valve realizes the inflation and pressurization of the cavity by setting a cavity inside the gasket, and the cavity is connected to the external inflation component through an air pipe. The gasket is inflated and pressurized so that the gaskets on both sides of the valve body are tightly attached to the guide rail, thereby achieving the purpose of leak prevention. When the gate valve needs to rise or fall, the pressure inside the gasket is released, so that the gasket and the guide rail lose the internal pressure and the mutual squeezing force. At this time, the valve body can easily move up and down in the guide rail, which not only ensures the sealing and leak prevention effect, but also reduces the loss of the gasket and prolongs the service life of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structural principle of a specific embodiment of the utility model in which a gate valve is installed in a water channel.

[0017] Figure 2 It is a schematic diagram of the structural principle of the gasket in a specific embodiment of the utility model.

[0018] Figure 3 This is a schematic diagram of the structural principle of the gasket in a specific embodiment of the utility model from another perspective.

[0019] Figure 4 It is a schematic diagram of the connection structure principle of the gasket inflation in a specific embodiment of the utility model.

[0020] Legend: 1. Water channel; 2. Valve body; 3. Guide rail; 4. Air pipe; 5. Electric actuator; 6. Screw; 7. Clamp strip; 8. Cavity; 9. Bolt hole; 10. Gasket; 11. First manual valve; 12. Stop valve; 13. Second manual valve; 14. Inflating interface; 15. Pressure gauge; 16. Inflating device. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0022] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] Example

[0025] like Figures 1 to 4As shown, the gate valve of the utility model comprises: a valve body 2, an air pipe 4, a gasket 10 and a lifting drive mechanism, wherein the valve body 2 is arranged in the guide rails 3 on both sides of the water channel 1, and the top of the valve body 2 is connected to the lifting drive mechanism. The gasket 10 is arranged on the side of the valve body 2 along the height direction of the valve body 2, and a cavity 8 is arranged inside the gasket 10, and the cavity 8 is connected to the external inflatable component through the air pipe 4. When the lifting drive mechanism drives the valve body 2 to descend to a preset position along the guide rail 3, gas is filled into the cavity 8, so that the gasket 10 bulges outward and fits tightly with the guide rail 3 to achieve sealing and blocking of the water channel 1. When the gas in the cavity 8 is discharged, the gasket 10 shrinks and detaches from the guide rail 3, and the lifting drive mechanism drives the valve body 2 to rise to a preset position along the guide rail 3 to achieve conduction of the water channel 1. It can be understood that the gate valve of this embodiment can be widely used in mechanisms that move up and down and need to be sealed, and can achieve a good sealing and leakproof effect.

[0026] Furthermore, after the gas in the cavity 8 is discharged, there is a gap of 2 to 3 mm between the gasket 10 and the guide rail 3 , so that the valve body 2 can move smoothly inside the guide rail 3 .

[0027] In this embodiment, by setting a cavity 8 inside the gasket 10, and connecting the cavity 8 to an external inflatable component through an air pipe, the cavity 8 is inflated and pressurized. By inflating and pressurizing the gasket 10, the gaskets 10 on both sides of the valve body 2 are tightly attached to the guide rail 3, achieving the purpose of leak prevention. When the gate valve needs to rise or fall, the pressure inside the gasket 10 is released, so that the gasket 10 and the guide rail 3 lose the internal pressure, thereby losing the mutual squeezing force. At this time, the valve body 2 can easily move up and down in the guide rail 3, which not only ensures the sealing and leak-proof effect, but also reduces the loss of the gasket 10 and prolongs the service life of the gate valve.

[0028] like Figure 2 and Figure 3 As shown, in this embodiment, the gasket 10 is in a "concave" shape, and clamping strips 7 are symmetrically arranged on both sides of the gasket 10, and multiple bolt holes 9 are evenly distributed on the clamping strips 7. The side of the valve body 2 is wrapped by the clamping strips 7, and screws are screwed into the bolt holes 9 and the side of the valve body 2 to achieve the side of the valve body 2 being sealed and wrapped inside the gasket 10.

[0029] By setting the cavity 8 in the gasket 10, and in the natural state, there is a gap between the gasket 10 and the guide rail 3, so that no friction is generated when the valve body 2 moves up and down. When the valve body 2 is lowered into place, the gasket 10 is appropriately deformed by applying pressure, thereby forming a close fit effect, and even if the surface of the guide rail 3 or the gasket 10 is slightly uneven, a good sealing effect can be achieved.

[0030] In this embodiment, a control valve is provided on the air pipe 4 to control the on and off of the air pipe 4 , and the air pipe 4 is connected to the inflation component through the inflation interface 14 .

[0031] like Figure 4 As shown, in this embodiment, the inflation assembly includes an inflation device 16 and a connecting pipe with a pressure gauge 15, one end of the connecting pipe is connected to the inflation device 16, and the other end of the connecting pipe is connected to the air pipe 4 through the inflation interface 14. The pressure gauge 15 is used to monitor the pressure in the cavity 8 to ensure the safety of the gasket 10.

[0032] Furthermore, the control valve includes a first manual valve 11, a stop valve 12, and a second manual valve 13 which are sequentially arranged. The inflating device 16 may be an air pump. When the valve is lowered into place, the air pump is slowly pressurized to deform the gasket 10, which protrudes toward the guide rail 3 and is tightly pressed against the guide rail 3, thereby forming a seal to achieve a leak-proof effect. In other embodiments, the inflating device 16 may also be an air pump.

[0033] like Figure 1 As shown, in this embodiment, the lifting drive mechanism includes an electric actuator 5 and a screw 6. One end of the screw 6 is connected to the top of the valve body 2, and the other end of the screw 6 is connected to the output end of the electric actuator 5. Under the drive of the electric actuator 5, the screw 6 rotates to drive the valve body 2 to reciprocate and lift along the guide rail 3.

[0034] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A gate valve, characterized in that: include: A valve body (2), an air pipe (4), a gasket (10) and a lifting drive mechanism, wherein the valve body (2) is arranged in the guide rails (3) on both sides of a water channel flow path (1), and the top of the valve body (2) is connected to the lifting drive mechanism; the gasket (10) is arranged on the side of the valve body (2) along the height direction of the valve body (2), and a cavity (8) is arranged inside the gasket (10), and the cavity (8) is connected to an external inflation component through the air pipe (4); when the lifting drive mechanism drives the valve body (2) to descend along the guide rail (3) to a preset position, gas is filled in the cavity (8), the gasket (10) protrudes and fits tightly with the guide rail (3) to achieve sealing and blocking of the water channel flow path (1); when the gas in the cavity (8) is discharged, the gasket (10) contracts and is separated from the guide rail (3), and the lifting drive mechanism drives the valve body (2) to rise along the guide rail (3) to a preset position to achieve conduction of the water channel flow path (1).

2. The gate valve according to claim 1, characterized in that: After the gas in the cavity (8) is discharged, a gap of 2 to 3 mm exists between the gasket (10) and the guide rail (3).

3. The gate valve according to claim 2, characterized in that: The gasket (10) has a "concave"-shaped structure, and clamping strips (7) are symmetrically provided on both sides of the gasket (10), and a plurality of bolt holes (9) are evenly distributed on the clamping strips (7); the side of the valve body (2) is wrapped by the clamping strips (7), and screws are screwed into the bolt holes (9) and the side of the valve body (2), so that the side of the valve body (2) is sealed and wrapped inside the gasket (10).

4. The gate valve according to claim 3, characterized in that: The air pipe (4) is provided with a control valve, and the air pipe (4) is connected to the inflation component via an inflation interface (14).

5. The gate valve according to claim 4, characterized in that: The inflation assembly comprises an inflation device (16) and a connecting pipe with a pressure gauge (15), one end of the connecting pipe is connected to the inflation device (16), and the other end of the connecting pipe is connected to the air pipe (4) via an inflation interface (14).

6. The gate valve according to claim 4, characterized in that: The control valve comprises a first manual valve (11), a stop valve (12) and a second manual valve (13) which are arranged in sequence.

7. The gate valve according to claim 5, characterized in that: The inflation device (16) is an air pump or an air pump.

8. The gate valve according to any one of claims 1 to 7, characterized in that: The lifting drive mechanism comprises an electric actuator (5) and a screw (6), one end of the screw (6) is connected to the top of the valve body (2), and the other end of the screw (6) is connected to the output end of the electric actuator (5). Under the drive of the electric actuator (5), the screw (6) rotates to drive the valve body (2) to move up and down along the guide rail (3).

Images