Wear-resistant gate valve

Abstract

The utility model relates to the related field of gate valves, in particular to a wear-resistant gate valve which comprises a valve body, a valve plate, a hand wheel, a valve rod, a wear-resistant layer, a mounting plate, an opening, an adjusting bolt, a supporting plate, a spring, a cleaning scraper and the like. The wear-resisting layer is arranged, so that the wear resistance of the valve plate is improved, the abrasion of the valve plate caused by friction is reduced, particle impurities adhered to the valve plate are scraped off through the cleaning scraper when the valve plate moves up and down in the opening and closing process of the gate valve, the friction between the valve plate and the valve body is reduced, the additional abrasion of the valve plate is reduced, and the service life of the gate valve is prolonged. And the service life of the valve plate is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of gate valves, in particular to a wear-resistant gate valve. Background Art

[0002] A gate valve, also known as a sluice valve or a gate valve, is a common type of valve, mainly used to open and close the fluid passage in a pipeline to achieve the control of the fluid. Its characteristic is to open or close the flow passage by lifting or lowering a component called a valve plate. The valve plate moves perpendicular to the fluid direction. When the valve plate moves downward, the passage of the fluid is blocked; when the valve plate is lifted upward, the fluid can pass through the valve body of the gate valve.

[0003] The structure of the valve plate of the existing gate valve is relatively simple, and its wear resistance is poor. When the gate valve is repeatedly opened and closed, the valve plate and the valve body rub against each other repeatedly, which easily causes wear of the valve plate. Especially when there are particulate impurities in the fluid adhering to the valve plate, it will increase the friction between the valve plate and the valve body, easily causing additional wear of the valve plate, and thus reducing the service life of the valve plate. Summary of the Invention

[0004] Therefore, in order to solve the above deficiencies, the utility model provides a wear-resistant gate valve to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions: A wear-resistant gate valve includes a valve body, a valve plate slidably installed in the valve body, and a handwheel rotatably installed at the upper end of the valve body. A valve stem is installed in the middle of the top surface of the valve plate. The valve stem movably passes through the inside of the valve body, and the side surface of the valve stem is threadedly connected to the inner ring of the handwheel. An installation plate is provided on the valve body, and a wear-resistant layer is provided on the valve plate;

[0006] The installation plate is locked and fixed in an opening formed on the side surface of the valve body through an adjusting bolt. A support plate is provided on the side of the installation plate close to the valve plate. The support plate is connected to the side surface of the installation plate through a spring, and a cleaning blade is pasted on the side surface of the support plate. The cleaning blade is closely attached to the side surface of the valve plate;

[0007] The wear-resistant layer includes a tungsten carbide plate installed on the outer surface of the valve plate.

[0008] Preferably, the vertical cross-section of the installation plate is a T-shaped structure, and an adjusting bolt is provided at each of the upper and lower ends of the installation plate.

[0009] Preferably, the wear-resistant layer further includes a ceramic coating coated on the outer surface of the tungsten carbide plate, and a plurality of silicon carbide particles are embedded in the ceramic coating.

[0010] Preferably, a trapezoidal positioning strip is provided in the tungsten carbide plate, and a positioning groove corresponding to the positioning strip is provided on the side surface of the valve plate.

[0011] Preferably, a ceramic coating is applied on the inner wall of the valve body in contact with the valve plate.

[0012] Preferably, the cleaning wiper is made of nitrile rubber.

[0013] Advantages of the present utility model:

[0014] By providing a wear-resistant layer, the wear resistance of the valve plate is improved, reducing the wear of the valve plate due to friction. During the opening and closing process of the gate valve, when the valve plate moves up and down, the cleaning wiper scrapes off the particulate impurities adhering to the valve plate, reducing the friction between the valve plate and the valve body and minimizing additional wear of the valve plate, which is beneficial to extending the service life of the valve plate. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the connection of the wear-resistant layer of the present utility model.

[0017] Wherein: valve body - 1, valve plate - 2, handwheel - 3, valve stem - 4, wear-resistant layer - 5, mounting plate - 6, opening - 7, adjusting bolt - 8, support plate - 9, spring - 10, cleaning wiper - 11, tungsten carbide plate - 51, ceramic coating - 52, silicon carbide particles - 53, positioning strip - 54. Detailed Embodiments

[0018] To further explain the technical solution of the present utility model, it will be elaborated in detail through specific embodiments below.

[0019] As Figure 1 shown, the present utility model provides a wear-resistant gate valve, including a valve body 1, a valve plate 2 slidably installed in the valve body 1, the valve plate 2 can move up and down along the inside of the valve body 1, a handwheel 3 rotatably installed at the upper end of the valve body 1, a valve stem 4 installed in the middle of the top surface of the valve plate 2, the valve stem 4 movably passes through the inside of the valve body 1, and the side surface of the valve stem 4 is threadedly connected to the inner ring of the handwheel 3;

[0020] Specifically, the left and right ends of the valve body 1 are connected to the pipeline system. By rotating the handwheel 3, the inner ring of the handwheel 3 cooperates with the valve stem 4 to drive the valve plate 2 to move upward to open the gate valve, at this time the fluid can pass through the valve body 1 and be discharged, and rotating the handwheel 3 in the reverse direction can drive the valve plate 2 to move downward to close the gate valve, at this time the valve plate 2 blocks the fluid and the fluid cannot pass through the valve body 1.

[0021] As Figure 1 and Figure 2 shown, in this embodiment, a mounting plate 6 is provided on the valve body 1, and a wear-resistant layer 5 is provided on the valve plate 2 to improve the wear resistance of the valve plate 2 through the wear-resistant layer 5;

[0022] The mounting plate 6 is locked and fixed in the opening 7 formed on the side surface of the valve body 1 through the adjusting bolts 8. A support plate 9 is provided on the side of the mounting plate 6 close to the valve plate 2. The support plate 9 is connected to the side surface of the mounting plate 6 through a spring 10. A cleaning blade 11 is pasted on the side surface of the support plate 9. The cleaning blade 11 is closely attached to the side surface of the valve plate 2. The cleaning blade 11 moves inward under the elastic force of the spring 10 and closely adheres to the side surface of the valve plate 2, so as to scrape off the residual particulate impurities adhered to the valve plate 2 through the cleaning blade 11;

[0023] The wear-resistant layer 5 includes a tungsten carbide plate 51 installed on the outer surface of the valve plate 2, which provides anti-wear protection for the valve plate 2, thereby improving the wear-resistant performance of the valve plate 2;

[0024] In this embodiment, the vertical section of the mounting plate 6 is a T-shaped structure, and an adjusting bolt 8 is provided at each of the upper and lower ends of the mounting plate 6, which is convenient for stably installing the mounting plate 6 on the valve body 1 through the two adjusting bolts 8;

[0025] In this embodiment, the wear-resistant layer 5 further includes a ceramic coating 52 coated on the outer surface of the tungsten carbide plate 51. A number of silicon carbide particles 53 are embedded in the ceramic coating 52 to further improve the wear-resistant performance of the valve plate 2;

[0026] In this embodiment, a trapezoidal positioning strip 54 is provided in the tungsten carbide plate 51, and a positioning groove corresponding to the positioning strip 54 is formed on the side surface of the valve plate 2, which is convenient for accurately placing the tungsten carbide plate 51 on the valve plate 2 through the cooperation of the positioning strip 54 and the positioning groove;

[0027] In this embodiment, a ceramic coating 52 is coated on the inner wall of the valve body 1 in contact with the valve plate 2, which improves the wear-resistant performance of the valve body 1 and is beneficial to improving the service life of the gate valve;

[0028] In this embodiment, the cleaning blade 11 is made of nitrile rubber, which has good wear-resistant performance and can better scrape off the particulate impurities on the valve plate 2;

[0029] Specifically, the cleaning blade 11 moves inward under the elastic force of the spring 10 and fits on the ceramic coating 52. During the up and down movement of the valve plate 2, the ceramic coating 52 and the cleaning blade 11 rub against each other. The cleaning blade 11 scrapes off the residual particulate impurities on the ceramic coating 52, which is beneficial to reducing the additional frictional force between the valve plate 2 and the valve body 1. Moreover, the position of the mounting plate 6 and the support plate 9 can be adjusted by adjusting the tightness of the adjusting bolt 8, thereby adjusting the pressure exerted by the support plate 9 on the spring 10 and the pressure exerted by the spring 10 on the cleaning blade 11, so as to adjust the pressure exerted by the cleaning blade 11 on the valve plate 2. When the pressure is relatively large, it is more conducive to scraping off the particulate impurities with strong adhesion on the valve plate 2. Adjusting the position of the support plate 9 is also beneficial for the cleaning blade 11 to more stably contact the ceramic coating 52 outside the valve plate 2, and the cleaning blade 11 can more stably scrape off the particulate impurities adhered outside the valve plate 2, improving the flexibility of the cleaning blade 11 during use.

[0030] The above are only the preferred examples of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wear-resistant gate valve, comprising a valve body, a valve plate slidably installed in the valve body, and a handwheel rotatably installed at the upper end of the valve body. A valve stem is installed in the middle of the top surface of the valve plate. The valve stem movably passes through the inside of the valve body, and the side surface of the valve stem is threadedly connected to the inner ring of the handwheel; It is characterized in that An installation plate is provided on the valve body, and a wear-resistant layer is provided on the valve plate; The installation plate is locked and fixed in an opening formed on the side surface of the valve body through an adjusting bolt. A support plate is provided on one side of the installation plate close to the valve plate. The support plate is connected to the side surface of the installation plate through a spring, and a cleaning blade is pasted on the side surface of the support plate. The cleaning blade is closely attached to the side surface of the valve plate; The wear-resistant layer includes a tungsten carbide plate installed on the outer surface of the valve plate.

2. The wear-resistant gate valve according to claim 1, wherein: The vertical cross-section of the installation plate is a T-shaped structure, and an adjusting bolt is provided at each of the upper and lower ends of the installation plate.

3. The wear-resistant gate valve according to claim 1, characterized in that: The wear-resistant layer further includes a ceramic coating coated on the outer surface of the tungsten carbide plate, and a number of silicon carbide particles are embedded in the ceramic coating.

4. The wear-resistant gate valve according to claim 3, wherein: A trapezoidal positioning strip is provided inside the tungsten carbide plate, and a positioning groove corresponding to the positioning strip is formed on the side surface of the valve plate.

5. The wear-resistant gate valve according to claim 3, wherein: A ceramic coating is coated on the inner wall of the valve body in contact with the valve plate.

6. The wear-resistant gate valve according to claim 1, characterized in that: The cleaning blade is made of nitrile rubber.

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