Double-phase soft sealing gate valve

Abstract

The utility model relates to the technical field of gate valve structure improvement, in particular to a double-phase soft sealing gate valve, which is characterized in that a long groove is arranged in a valve plate, the upper end of the long groove is communicated with the upper edge of the valve plate, the lower end of a screw rod extends into the long groove, a screw rod copper nut is arranged on the screw rod, and the screw rod copper nut is connected with the upper edge of the valve plate. The lead screw can drive the lead screw copper nut and the valve plate to conduct lifting motion between the cavity and the open hole when rotating, rubber sealing strips are arranged on the inner surface of a front end opening of the open hole and the inner surface of a rear end opening of the open hole, and the two rubber sealing strips wrap the inner surface of the front end opening of the open hole and the inner surface of the rear end opening of the open hole respectively. The utility model has the beneficial effects of easy disassembly, assembly and replacement, and strong sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of structural improvement of gate valves, in particular to a two-phase soft-sealing gate valve. Background Art

[0002] At present, there are various vacuum valves such as ball valves, butterfly valves, baffle valves, gate valves, etc. Among them, the gate valve is a widely used large industrial valve. In the actual application process, the gate valve not only needs to face difficult problems such as large flow resistance, large volume, difficult installation, and large floor area, but also needs to consider the sealing problem. The existing gate valves all use grooved rubber strips for sealing during sealing, which is a one-way sealing structure. This sealing structure is not ideal in achieving no leakage during cavity evacuation and inflation, and cannot meet the sealing requirements of the gate valve. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and design a two-phase soft-sealing gate valve.

[0004] To achieve the above purpose, the technical solution of the utility model is that a two-phase soft-sealing gate valve includes a valve body, a valve plate and a driving mechanism. A cavity is provided in the upper part of the valve body, and a connection port is provided on the upper end surface of the valve body. The connection port is communicated with the cavity. The driving mechanism is installed at the connection port. An opening is provided in the lower part of the valve body, and the opening communicates the front surface and the rear surface of the valve body. The lower end of the cavity is communicated with the opening. A lead screw is provided in the cavity. The upper end of the lead screw extends out of the connection port and is connected with the driving mechanism. The valve plate is installed at the opening, and the valve plate can perform a lifting movement between the opening and the cavity. The feature is that a long groove is provided in the valve plate, the upper end of the long groove is communicated with the upper edge of the valve plate, the lower end of the lead screw extends into the long groove, a lead screw copper nut is installed on the lead screw, and the lead screw copper nut is connected with the upper edge of the valve plate. When the lead screw rotates, it can drive the lead screw copper nut and the valve plate to perform a lifting action between the cavity and the opening. Rubber sealing strips are provided on the inner surfaces of the front port and the rear port of the opening, and the two rubber sealing strips respectively wrap the inner surfaces of the front port and the rear port of the opening.

[0005] Both of the two rubber sealing strips are of an annular structure, and the rubber sealing strips are arranged along the inner surface of the front port or the rear port of the opening.

[0006] One of the rubber sealing strips covers the front surface of the front port of the opening, the inner side surface of the front port of the opening, and the rear surface of the front port of the opening, and one of the rubber sealing strips seals the gap between the front port of the opening and the front surface of the valve plate; the other rubber sealing strip covers the rear surface of the rear port of the opening, the inner side surface of the rear port of the opening, and the front surface of the rear port of the opening, and the other rubber sealing strip seals the gap between the rear surface of the front port of the opening and the front surface of the valve plate.

[0007] The longitudinal section of the rubber sealing strip is in a "G" - shaped structure.

[0008] The driving mechanism is a handwheel or an electric rotating wheel.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. This application changes the installation method of the sealing rubber. The grooved rubber sealing strip on the valve body is changed to a wrapped rubber sealing strip, so that the sealing strip fully wraps around the front port and the rear port of the opening. This sealing structure can effectively solve the problem of difficult replacement after the sealing strip wears, and has the advantages of easy replacement, easy installation, and easy disassembly, minimizing the impact on the production progress to the greatest extent;

[0011] 2. This application changes the one - way sealing structure to a two - way sealing structure, solving the drawback of not being able to withstand reverse pressure. Whether the valve plate is subjected to positive or reverse pressure, the two rubber sealing strips can seal the valve plate, thus achieving two - way sealing, improving the sealing performance, and achieving the effect of zero leakage;

[0012] 3. This application can better improve the pressure borne by the valve plate. Compared with the traditional large - diameter plug valve, this application can increase the force on the valve plate from 4KG to 10KG.

[0013] 4. This application is not prone to external leakage, can effectively control the installation size of the valve, better meet the installation requirements of small spaces, has a low working pressure, is not prone to debris accumulation, and the gate plate does not vibrate and makes no noise under high pressure. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a two - phase soft - sealing plug valve of the utility model;

[0015] Figure 2 is the utility model Figure 1 a schematic structural diagram of the A - A section;

[0016] Figure 3 is the utility model Figure 2 a partially enlarged schematic structural diagram of part B;

[0017] In the figure, 1 is the valve body; 2 is the valve plate; 3 is the driving mechanism; 4 is the cavity; 5 is the connection port; 6 is the opening; 7 is the lead screw; 8 is the long slot; 9 is the lead screw copper nut; 10 is the rubber sealing strip. Detailed implementation mode

[0018] The following combines the accompanying drawings to specifically describe the present utility model, as Figures 1-3 shown;

[0019] A two-phase soft-sealing flap valve includes a valve body 1, a valve plate 2 and a driving mechanism 3. A cavity 4 is provided in the upper part of the valve body. The size of the cavity matches the size of the valve plate. A connection port 5 is provided on the upper end surface of the valve body. The connection port communicates with the cavity. The driving mechanism is installed at the connection port. An opening 6 is provided in the lower part of the valve body. The opening communicates the front surface and the rear surface of the valve body. Flanges are provided at both the front port and the rear port of the opening. The lower end of the cavity communicates with the opening. A lead screw 7 is provided in the cavity. The upper end of the lead screw extends out of the connection port and is connected to the driving mechanism. The lead screw rotates under the drive of the driving mechanism. The valve plate is installed at the opening. The valve plate can perform a lifting movement between the opening and the cavity. A long slot 8 is provided in the valve plate. The length direction of the long slot is consistent with the length direction of the lead screw. The upper end of the long slot communicates with the upper edge of the valve plate. The lower end of the lead screw extends into the long slot. A lead screw copper nut 9 is installed on the lead screw. The lead screw copper nut is connected to the upper edge of the valve plate. When the lead screw rotates, it can drive the lead screw copper nut and the valve plate to perform a lifting action between the cavity and the opening. Rubber sealing strips 10 are provided on the inner surfaces of the front port and the rear port of the opening. The two rubber sealing strips respectively wrap the inner surfaces of the front port and the rear port of the opening.

[0020] Both of the two rubber sealing strips are of an annular structure. The rubber sealing strips are arranged along the inner surface of the front port or the inner surface of the rear port of the opening.

[0021] The inner surface of the front orifice port includes the front surface of the front orifice port, the inner side surface of the front orifice port, and the rear surface of the front orifice port. The rear surface of the front orifice port faces the front surface of the valve plate. One rubber sealing strip covers the front surface of the front orifice port, the inner side surface of the front orifice port, and the rear surface of the front orifice port. Another rubber sealing strip seals the gap between the rear surface of the front orifice port and the front surface of the valve plate. The inner surface of the rear orifice port includes the rear surface of the rear orifice port, the inner side surface of the rear orifice port, and the front surface of the rear orifice port. The front surface of the rear orifice port faces the rear surface of the valve plate. Another rubber sealing strip covers the rear surface of the rear orifice port, the inner side surface of the rear orifice port, and the front surface of the rear orifice port. Another rubber sealing strip seals the gap between the rear surface of the front orifice port and the front surface of the valve plate.

[0022] The longitudinal section of the rubber sealing strip is in a "G" - shaped structure.

[0023] The driving mechanism is a handwheel or an electric rotating wheel.

[0024] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including said element.

[0025] The above - mentioned technical solution only reflects the preferred technical solution of the technical solution of the present utility model. Some possible changes made by those skilled in the art to some parts thereof all reflect the principle of the present utility model and fall within the protection scope of the present utility model.

Claims

1. A two-phase soft-sealing flap valve, comprising a valve body (1), a valve plate (2) and a driving mechanism (3). The upper part of the valve body is provided with a cavity (4), and the upper end face of the valve body is provided with a connection port (5). The connection port is communicated with the cavity. The driving mechanism is installed at the connection port. The lower part of the valve body is provided with an opening (6), and the opening communicates the front surface and the rear surface of the valve body. The cavity is communicated with the opening. A lead screw (7) is arranged in the cavity, the upper end of the lead screw is connected with the driving mechanism, and the valve plate is installed at the opening. It is characterized in that, A long groove (8) is provided in the valve plate. The lower end of the lead screw extends into the long groove. A lead screw copper nut (9) is installed on the lead screw. The lead screw copper nut is connected to the upper edge of the valve plate. When the lead screw rotates, it can drive the lead screw copper nut and the valve plate to perform a lifting action between the cavity and the opening. Rubber sealing strips (10) are provided on the inner surface of the front port of the opening and the inner surface of the rear port of the opening. The two rubber sealing strips respectively wrap the inner surface of the front port of the opening and the inner surface of the rear port of the opening.

2. A double-phase soft-sealing plug valve according to claim 1, characterized in that, Both of the two rubber sealing strips are of an annular structure, and the rubber sealing strips are arranged along the inner surface of the front port of the opening or the inner surface of the rear port of the opening.

3. The bi-phase soft-sealing plug valve according to claim 2, characterized in that, One rubber sealing strip covers the front surface, the inner side surface and the rear surface of the front port of the opening, and one rubber sealing strip seals the gap between the front port of the opening and the front surface of the valve plate; the other rubber sealing strip covers the rear surface, the inner side surface and the front surface of the rear port of the opening, and the other rubber sealing strip seals the gap between the rear surface of the front port of the opening and the front surface of the valve plate.

4. A two-phase soft-sealing plug valve according to claim 3, characterized in that The longitudinal section of the rubber sealing strip is of a "G" - shaped structure.

5. A double-phase soft-sealing plug valve according to claim 1, characterized in that, The driving mechanism is a hand wheel or an electric rotating wheel.

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