Corrosion-resistant valve seat resistant to strong acid and strong alkali

Abstract

The utility model discloses a corrosion-resistant valve seat resistant to strong acid and strong alkali, which comprises a valve seat disc, the valve seat disc comprises a threaded column fixedly installed at the bottom, the threaded column is in threaded connection with the inner wall of a valve body, a valve core plate is arranged above the valve seat disc in an attached mode, and four guide plates are fixedly installed at the bottom of the valve core plate. The guide plate is arranged in the valve seat disc, a sealing gasket is fixedly arranged at the bottom of the valve element plate, an elastic sealing ring is arranged in the valve seat disc, the sealing gasket and the elastic sealing ring are the same in size, the upper end of the valve element plate is fixedly connected with a valve rod mounting seat, and the upper end of the valve rod mounting seat is fixedly connected with a valve rod body. A notch is formed in the valve seat disc, the valve element plate is matched with the notch, a sealing groove is formed in the position, located on the inner side of the notch, in the valve seat disc, the elastic sealing ring is fixedly installed in the sealing groove, accurate alignment of the valve element and the valve seat can be achieved, and the sealing effect of the valve element and the valve seat can be improved.

Description

Technical Field

[0001] This utility model relates to the field of valve seat technology, and in particular to a corrosion-resistant valve seat resistant to strong acids and alkalis. Background Technology

[0002] A gate valve is a commonly used pipeline valve, mainly used to cut off or connect the flow of media in a pipeline. A gate valve typically consists of a valve body, valve cover, valve stem, valve core (valve disc), and valve seat. By rotating the valve stem, the valve core moves up and down along the valve stem axis, thus opening and closing the valve. When the valve core descends and is tightly fitted against the valve seat, the valve is closed, preventing media flow. When the valve core rises and leaves the valve seat, the valve opens, allowing the media to pass through.

[0003] Existing gate valve seats have some shortcomings in use. They are often subjected to long-term corrosion from strong acid and alkali media and friction during valve opening and closing. The sealing surface of the valve seat may experience wear and corrosion, resulting in reduced sealing performance and leakage when blocking the medium, thus affecting the sealing effect. To address these issues, a corrosion-resistant valve seat resistant to strong acids and alkalis is proposed for improvement and upgrading. Utility Model Content

[0004] The purpose of this invention is to provide a corrosion-resistant valve seat that is resistant to strong acids and alkalis, so as to solve the problems mentioned in the background art.

[0005] To solve the above problems, the following technical solution is provided: a corrosion-resistant valve seat resistant to strong acids and alkalis, comprising a valve seat disc, the valve seat disc including a threaded post fixedly installed at the bottom, the threaded post being threadedly connected to the inner wall of the valve body, a valve core plate being fitted on the upper part of the valve seat disc, four guide plates being fixedly installed at the bottom of the valve core plate, the guide plates being disposed inside the valve seat disc, a sealing gasket being fixedly installed at the bottom of the valve core plate, and an elastic sealing ring being disposed inside the valve seat disc, the sealing gasket being the same size as the elastic sealing ring.

[0006] As a preferred embodiment of the above technical solution, a valve stem mounting seat is fixedly connected to the upper end of the valve core plate, and a valve stem body is fixedly connected to the upper end of the valve stem mounting seat. A slot is opened inside the valve seat plate, and the valve core plate is adapted to the slot.

[0007] As a preferred embodiment of the above technical solution, a sealing groove is provided inside the valve seat disc on the inner side of the slot, the elastic sealing ring is fixedly installed inside the sealing groove, and the sealing gasket is adapted to the sealing groove.

[0008] As a preferred embodiment of the above technical solution, four guide grooves are fixedly provided on the inner wall of the valve seat disc, and the four guide plates are slidably connected inside the guide grooves, with the guide plates and guide grooves being adapted to each other.

[0009] As a preferred embodiment of the above technical solution, both the elastic sealing ring and the sealing gasket are made of fluororubber, and the valve seat disc is made of Hastelloy.

[0010] As a preferred embodiment of the above technical solution, the inner wall of the valve seat disc is provided with six mounting grooves, each of which is threaded with six threaded rods, one end of which is connected to the inner wall of the valve body, and a threaded knob is fixedly connected to the upper end of each threaded rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The device of this utility model is equipped with components such as valve core plate, valve seat plate, guide plate, elastic sealing ring, and sealing gasket. By driving the sealing gasket to press against the sealing groove in the valve seat plate, the valve core plate promotes relative compression and sealing with the elastic sealing ring. At the same time, the guide plate and the guide groove are precisely aligned, which is conducive to the precise alignment of the valve core and the valve seat and improves its sealing effect. In addition, the valve seat has a certain resistance to strong acids and alkalis and corrosion, which improves the sealing performance of the valve.

[0013] 2. The device of this utility model is equipped with components such as threaded knob, threaded rod, and threaded column, which helps to stably fix the valve seat inside the valve body, avoid the valve seat being subjected to media impact for a long time and resulting in poor fixation effect, causing misalignment with the valve core, improve the tightness of the fit between the valve core and the valve seat, and prevent liquid leakage.

[0014] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of a corrosion-resistant valve seat resistant to strong acids and alkalis according to the present invention.

[0017] Figure 2 This is a schematic diagram of the disassembled structure of a corrosion-resistant valve seat resistant to strong acids and alkalis according to the present invention.

[0018] Figure 3 for Figure 2 Enlarged diagram of the split structure;

[0019] Figure 4 for Figure 3 A schematic diagram of the partially split structure.

[0020] In the diagram: 1. Valve seat plate; 2. Valve core plate; 21. Valve stem mounting seat; 22. Guide plate; 23. Sealing gasket; 3. Threaded post; 4. Threaded knob; 41. Threaded rod; 42. Mounting groove; 5. Sealing groove; 6. Elastic sealing ring; 7. Guide groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 4 As shown in the figure, this embodiment provides a corrosion-resistant valve seat resistant to strong acids and alkalis, including a valve seat plate 1. The valve seat plate 1 includes a threaded post 3 fixedly installed at the bottom. The threaded post 3 is threadedly connected to the inner wall of the valve body. A valve core plate 2 is attached to the top of the valve seat plate 1. Four guide plates 22 are fixedly installed at the bottom of the valve core plate 2. The guide plates 22 are located inside the valve seat plate 1. A sealing gasket 23 is fixedly installed at the bottom of the valve core plate 2. An elastic sealing ring 6 is provided inside the valve seat plate 1. The sealing gasket 23 and the elastic sealing ring 6 are the same size.

[0023] like Figure 3 As shown, a valve stem mounting seat 21 is fixedly connected to the upper end of the valve core plate 2, and a valve stem body is fixedly connected to the upper end of the valve stem mounting seat 21. A slot is opened inside the valve seat plate 1, and the valve core plate 2 is adapted to the slot. A sealing groove 5 is opened inside the valve seat plate 1 on the inner side of the slot. An elastic sealing ring 6 is fixedly installed inside the sealing groove 5. A sealing gasket 23 is adapted to the sealing groove 5. Four guide grooves 7 are fixedly opened on the inner wall of the valve seat plate 1. Four guide plates 22 are slidably connected inside the guide grooves 7, and the guide plates 22 are adapted to the guide grooves 7.

[0024] By pushing the valve core plate 2, the sealing gasket 23 is pressed against the sealing groove 5 in the valve seat plate 1, causing it to be pressed and sealed relative to the elastic sealing ring 6. At the same time, the guide plate 22 and the guide groove 7 are precisely aligned, which makes it easy for the valve stem to drive the valve core to move downward and engage with the valve seat plate 1 to block and seal the medium.

[0025] like Figure 4 As shown, the elastic sealing ring 6 and the sealing gasket 23 are both made of fluororubber, and the valve seat plate 1 is made of Hastelloy. The inner wall of the valve seat plate 1 has six mounting grooves 42, and each mounting groove 42 is threaded with six threaded rods 41, one end of which is connected to the inner wall of the valve body. A threaded knob 4 is fixedly connected to the upper end of the threaded rod 41.

[0026] By using fluororubber for both the elastic sealing ring 6 and the sealing gasket 23, which has good resistance to strong acids and alkalis and strong corrosion resistance, it can maintain good performance in high temperature and strong chemical media environments. At the same time, the valve seat material is set to Hastelloy, which is a nickel-based corrosion-resistant alloy. It has good corrosion resistance to strong acids such as hydrochloric acid, sulfuric acid, and nitric acid of various concentrations, as well as strong alkalis such as sodium hydroxide. It also has good resistance to stress corrosion cracking.

[0027] The working principle and process of this utility model are as follows: The medium enters through the valve inlet pipe and flows out through the outlet pipe. When it is necessary to close the medium, the valve stem axis is moved up and down by turning the handwheel. This causes the valve stem to move the valve core plate 2 on the valve stem mounting seat 21 downward and align with the valve seat plate 1 inside the valve body. This causes the sealing gasket 23 on the bottom of the valve core plate 2 to press the elastic sealing ring 6 inside the valve seat plate 1, making the valve core plate 2 and the valve seat plate 1 fit and press together. At the same time, when the valve core plate 2 moves, it is precisely aligned with the guide groove 7 on the valve seat using the guide plate 22. This facilitates a good and relatively stable compression and sealing effect between the valve core plate 2 and the valve seat. The valve seat plate 1 is threaded to the inside of the valve body using the threaded post 3. Then, by turning the six threaded knobs 4, the threaded rod 41 is rotated so that one end is fixed to the inner wall of the valve body. This facilitates the stable fixing of the valve seat and avoids problems such as the valve seat position loosening due to long-term medium impact, which affects the alignment with the valve core.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A corrosion-resistant valve seat resistant to strong acids and alkalis, characterized in that, The valve includes a valve seat plate (1), which includes a threaded post (3) fixedly installed at the bottom. The threaded post (3) is threadedly connected to the inner wall of the valve body. A valve core plate (2) is attached to the top of the valve seat plate (1). Four guide plates (22) are fixedly installed at the bottom of the valve core plate (2). The guide plates (22) are located inside the valve seat plate (1). A sealing gasket (23) is fixedly installed at the bottom of the valve core plate (2). An elastic sealing ring (6) is provided inside the valve seat plate (1). The sealing gasket (23) and the elastic sealing ring (6) are the same size.

2. The corrosion-resistant valve seat resistant to strong acids and alkalis according to claim 1, characterized in that, The upper end of the valve core plate (2) is fixedly connected to the valve stem mounting seat (21), and the upper end of the valve stem mounting seat (21) is fixedly connected to the valve stem body. The valve seat plate (1) has a slot inside, and the valve core plate (2) is adapted to the slot.

3. A corrosion-resistant valve seat resistant to strong acids and alkalis according to claim 2, characterized in that, The valve seat disc (1) has a sealing groove (5) inside the slot, the elastic sealing ring (6) is fixedly installed inside the sealing groove (5), and the sealing gasket (23) is adapted to the sealing groove (5).

4. A corrosion-resistant valve seat resistant to strong acids and alkalis according to claim 3, characterized in that, The valve seat disc (1) has four guide grooves (7) fixedly opened on its inner wall. The four guide plates (22) are slidably connected inside the guide grooves (7). The guide plates (22) are adapted to the guide grooves (7).

5. A corrosion-resistant valve seat resistant to strong acids and alkalis according to claim 4, characterized in that, The elastic sealing ring (6) and the sealing gasket (23) are both made of fluororubber, and the valve seat plate (1) is made of Hastelloy.

6. A corrosion-resistant valve seat resistant to strong acids and alkalis according to claim 1, characterized in that, The valve seat disc (1) has six mounting slots (42) on its inner wall. Each mounting slot (42) is threaded with six threaded rods (41), and one end of each threaded rod (41) is connected to the inner wall of the valve body. A threaded knob (4) is fixedly connected to the upper end of each threaded rod (41).

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