Wear-resistant double-gate valve

Abstract

The wear-resistant double-gate valve comprises a valve body and a valve rod, the valve rod is inserted into the valve body, a driving piece is installed on the valve body, the upper end of the valve rod is connected with the driving piece, two gates are arranged at the bottom in the valve body, the two gates are arranged on the two sides of the valve body respectively and connected through a gate frame, and a main valve seat is arranged on the inner wall of the valve body. An auxiliary valve seat is arranged on the flashboards and presses the main valve seat in an attached mode, a spring cavity is formed in the flashboard frame, a compression spring is arranged in the spring cavity, the two ends of the compression spring are connected with the two flashboards respectively, the compression spring abuts against the flashboards, an ash guide groove hole is formed in the flashboard frame and communicated with the spring cavity, and the lower end of the valve rod is connected with the flashboard frame. By means of the ash guide groove hole, ash in the spring cavity can fall off in time, the spring cannot be clamped, the jacking effect of the spring on the gate plate is ensured, and the sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve, concretely a wear-resistant double-gate valve. BACKGROUND

[0002] In the production activities of chemical industry and thermal power industry, dust medium is often accompanied, and gas delivery is generally adopted, which is commonly known as fly ash. Fly ash medium has certain hardness and small particle size. Traditional double-gate valves are composed of many components, and there are gaps of different sizes between parts. Fly ash is easily left in these gaps, resulting in valve sealing failure. Since gas delivery medium is often accompanied, the valve needs to have good sealing performance. SUMMARY

[0003] To solve the above technical problems, the present application provides a wear-resistant double-gate valve with better sealing performance.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] A wear-resistant double-gate valve includes a valve body and a valve stem. The valve stem is inserted into the valve body. A driving member is installed on the valve body, and the upper end of the valve stem is connected to the driving member. Two gate plates are arranged at the bottom of the valve body, one on each side of the valve body. The two gate plates are connected by a gate plate frame. A main valve seat is arranged on the inner wall of the valve body, and a secondary valve seat is arranged on the gate plate. The secondary valve seat is in contact with and presses the main valve seat. A spring cavity is arranged in the gate plate frame, and a compression spring is arranged in the spring cavity. The two ends of the compression spring are connected to the two gate plates, and the compression spring presses the gate plates. A dust guide groove is arranged in the gate plate frame, and the dust guide groove is in communication with the spring cavity. The lower end of the valve stem is connected to the valve plate frame.

[0006] As a further improvement, a bottom cover is arranged on the bottom surface of the valve body. A dust sweeping port is arranged in the bottom cover, and the dust sweeping port is in communication with the inside of the valve body. A top dust sweeping port is also arranged on the top of the valve body.

[0007] As a further improvement, a pre-tightening disc spring is arranged in the valve plate frame. The pre-tightening disc spring is inclined and presses the gate plate, so that the gate plate is subjected to a pressing force from the gate plate frame to the main valve seat.

[0008] As a further improvement, the bottom cover is connected to the valve body by bolts.

[0009] As a further improvement, a clamping table is arranged on the gate plate frame, and the gate plate is attached to the clamping table. The pre-tightening disc spring is arranged on the side wall of the clamping table.

[0010] As a further improvement, a packing is arranged between the valve stem and the valve body.

[0011] As a further improvement, an installation groove is arranged in the gate plate, and the gate plate frame is clamped into the installation groove.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] By setting a guide groove in the spring hole, fly ash and other substances entering the spring cavity during valve opening and closing are prevented from remaining in the inner cavity and jamming the spring. Furthermore, the ash removal port can be used to add a purging function during valve operation, so that dust and other media will not remain inside the valve cavity. The pre-tightened disc spring is used to further compress the gate plate and improve the sealing performance. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the present invention.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the diagram;

[0016] Figure 3 This is a schematic diagram of the front view of this utility model.

[0017] Figure label:

[0018] Drive component 1, bracket 2, packing 3, gate frame 4, valve body 5, valve stem 6, main valve seat 7, gate 8, ash sweeping port 9, auxiliary valve seat 10, top ash sweeping port 11, spring cavity 12, compression spring 13, ash guide groove hole 14, pre-tightening disc spring 15. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0022] like Figure 1 and 2 As shown, a wear-resistant double gate valve includes a valve body 5 and a valve stem 6. The valve stem 6 is inserted into the valve body 5. A drive component 1 is mounted on the valve body 5 and connected to the valve body 5 via a bracket 2. The upper end of the valve stem 6 is connected to the drive component 1. Two gates 8 are provided at the bottom of the valve body 5, respectively located on both sides of the valve body 5 and connected by a gate frame 4. A main valve seat 7 is provided on the inner wall of the valve body 5, and a secondary valve seat 10 is provided on the gate 8, pressing against the main valve seat 7. A spring cavity 12 is provided in the gate frame 4, and a compression spring 13 is provided in the spring cavity 12. The two ends of the compression spring 13 are connected to the two gates 8 respectively, and the compression spring 13 abuts against the gates 8. A dust guide groove 14 is provided in the gate frame 4, which communicates with the spring cavity 12. The lower end of the valve stem 6 is connected to the valve frame 4. The drive component drives the valve stem to move. By setting a guide groove on the bottom surface of the gate frame, fly ash and other contaminants entering the spring chamber during valve opening and closing are prevented from remaining in the inner cavity and jamming the compression spring, ensuring its long-term use without being affected. When in normal use, the compression spring can effectively press against the gate, thus ensuring a tight seal.

[0023] The bottom surface of the valve body 5 is provided with a bottom cover, and a dust removal port 9 is provided inside the bottom cover. The dust removal port 9 communicates with the interior of the valve body 5. This dust removal port can sweep the fallen dust to the outside of the valve body, so that the dust will not remain inside the valve body and will not affect the use of the components. The top of the valve body 5 is also provided with a top dust removal port 11, which can also be used for dust removal from the top.

[0024] The valve plate frame 4 is provided with a pre-tightening disc spring 15. The pre-tightening disc spring 15 is inclined and presses against the gate plate 8, so that the gate plate is subjected to the clamping force from the gate plate frame to the main valve seat. The pre-tightening disc spring forms a pre-tightening pressure on the valve plate, so that the gate plate always maintains a pressing force towards the side wall of the valve body, so that the auxiliary valve seat presses tightly against the main valve seat and maintains the sealing.

[0025] The bottom cover is locked to the valve body by bolts.

[0026] The gate frame is equipped with a mounting plate, on which the gate plate fits. A pre-tensioned disc spring is mounted on the side wall of the mounting plate. The gate plate has an installation groove inside, and the end of the gate frame is inserted into the installation groove. Both ends of the gate frame are inserted into the installation grooves of the two gate plates respectively, forming a more stable initial structure.

[0027] A packing 3 is provided between the valve stem 6 and the valve body 5.

[0028] This invention achieves multiple sealing mechanisms. Firstly, a pre-tightened disc spring applies lateral pre-tightening pressure to the gate, ensuring a tight seal between the secondary and main valve seats. A compression spring presses against the gate, guaranteeing a tight seal. Secondly, a guide slot prevents fly ash and other contaminants from entering the spring cavity during valve operation, thus preventing them from remaining inside and jamming the compression spring, ensuring it remains under effective elastic pressure. Finally, a purging port adds a blowing function during valve operation, preventing dust and other media from remaining inside the valve cavity.

[0029] It should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant double gate valve, comprising a valve body and a valve stem, characterized in that, The valve stem is inserted into the valve body, and a drive component is installed on the valve body. The upper end of the valve stem is connected to the drive component. Two gates are provided at the bottom of the valve body, and the two gates are respectively located on both sides of the valve body. The two gates are connected by a gate frame. A main valve seat is provided on the inner wall of the valve body, and a secondary valve seat is provided on the gate. The secondary valve seat fits against the main valve seat. A spring cavity is provided in the gate frame, and a compression spring is provided in the spring cavity. The two ends of the compression spring are respectively connected to the two gates, and the compression spring abuts against the gate. A dust guide groove is provided in the gate frame, and the dust guide groove communicates with the spring cavity. The lower end of the valve stem is connected to the valve frame.

2. The wear-resistant double gate valve according to claim 1, characterized in that, The bottom surface of the valve body is provided with a bottom cover, and the bottom cover is provided with a dust sweeping port. The dust sweeping port is connected to the inside of the valve body, and the top of the valve body is also provided with a top dust sweeping port.

3. The wear-resistant double gate valve according to claim 1, characterized in that, The valve plate frame is equipped with a pre-tensioning disc spring, which is inclined and presses against the gate plate, so that the gate plate is subjected to a clamping force from the gate plate frame to the main valve seat.

4. The wear-resistant double gate valve according to claim 2, characterized in that, The bottom cover is locked to the valve body by bolts.

5. The wear-resistant double gate valve according to claim 3, characterized in that, The gate frame is equipped with a clamping platform, the gate is attached to the clamping platform, and a pre-tensioned disc spring is installed on the side wall of the clamping platform.

6. The wear-resistant double gate valve according to claim 1, characterized in that, Packing material is provided between the valve stem and the valve body.

7. The wear-resistant double gate valve according to claim 1, characterized in that, The gate is provided with an installation groove, and the port of the gate frame is snapped into the installation groove.

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