A gate valve resistant to erosion and corrosion

Abstract

This utility model discloses an erosion-resistant and corrosion-resistant gate valve, comprising a gate valve body, a pipe connected to one end of the gate valve body, a diversion pipe connected to the other end of the gate valve body, and another pipe connected to the other end of the diversion pipe. A column is fixedly connected to the lower end of the gate valve body, and a base is fixedly connected to the lower end of the column. A sliding groove is provided through the side wall of the base, and a slide seat is slidably connected within the sliding groove. A guide device is fixedly connected to the side wall of the slide seat. The upper end of the slide seat is connected to the lower end of the diversion pipe via another column. A diversion device is slidably disposed within the diversion pipe. This utility model has the advantages of reducing the fluid impact force on the valve body and facilitating the replacement of vulnerable parts at any time.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a gate valve that is resistant to erosion and corrosion. Background Technology

[0002] A gate valve is a valve in which the closing element moves vertically along the centerline of the flow path. It is mainly used to connect or disconnect the medium in a pipeline and cannot be used for regulation or throttling. The valve is opened and closed by rotating the valve stem, which drives the gate to move linearly up and down. When the gate is raised above the valve seat passage, the valve is fully open, allowing free flow of the medium; when the gate is fully lowered onto the valve seat, the valve is closed, preventing the flow of the medium. The valve consists of a valve body, valve cover, gate, valve stem, valve seat, sealing packing, and handwheel.

[0003] In the prior art, during the use of gate valves, the excessively fast flow rate of the fluid in the pipeline will continuously impact the inner wall and valve body of the gate valve, causing irreversible damage. In order to reduce the impact force, the fluid is usually divided into multiple streams to reduce the impact force and distribute the impact force at the front end. Therefore, we propose an erosion-resistant and corrosion-resistant gate valve. Utility Model Content

[0004] The purpose of this utility model is to provide a gate valve that is resistant to erosion and corrosion, so as to solve the problems existing in the prior art as described in the background.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gate valve resistant to erosion and corrosion includes a gate valve body, one end of which is connected to a pipe, and the other end of which is connected to a diversion pipe. The other end of the diversion pipe is connected to another pipe. A column is fixedly connected to the lower end of the gate valve body, and a base is fixedly connected to the lower end of the column. A groove is formed through the side wall of the base, and a slide seat is slidably connected within the groove. A guide device is fixedly connected to the side wall of the slide seat. The upper end of the slide seat is connected to the lower end of the diversion pipe via another column. A diversion device is slidably arranged within the diversion pipe.

[0007] Preferably, the guiding device includes two guide plates fixedly connected to the side wall of the slide block. The two guide plates are arranged on both sides of the guide plate, and the inner walls of the corresponding slide grooves are provided with slide grooves through each other. The two guide plates are slidably connected in the two slide grooves respectively.

[0008] Preferably, the diversion device includes two diversion plates slidably disposed inside the diversion pipe. The two diversion plates are connected by multiple fixed posts. Multiple diversion holes are provided through the side walls of the two diversion plates. Four slots are provided through the inner wall of the diversion pipe at corresponding positions. Limiting plates are magnetically fixed in the four slots. The four limiting plates are located at the side walls of the two diversion plates in pairs.

[0009] Preferably, a limiting pin is threaded through the upper end of the slide block, and the tail end of the limiting pin is threaded through the inner wall of the slide groove.

[0010] Preferably, the multiple diversion holes on the sidewalls of the two diversion plates do not overlap.

[0011] Preferably, a handle is fixedly connected to the upper end of the slide.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By setting up a guiding device and a flow-dividing device in coordination, a flow-dividing pipe is designed at the front of the valve body. Inside the flow-dividing pipe are two movable flow-dividing plates. The two flow-dividing plates are relatively fixed, and the flow-dividing holes on the two flow-dividing plates do not overlap. When the fluid flows through this, the fluid velocity increases and the pressure decreases when it passes through the first flow-dividing plate. Part of the kinetic energy is converted into turbulent dissipation. The opening position of the second flow-dividing plate is offset from that of the first plate. The fluid needs to readjust its flow direction, further consuming kinetic energy and adding pressure drop, thereby reducing the overall average flow velocity. The pressure drop of the two flow-dividing plates is approximately added together, and the total system resistance increases significantly. When the fluid passes through the flow-dividing plates, the kinetic energy is converted into heat energy through turbulence and friction, reducing the impact energy of the fluid on the downstream valve body, thereby achieving the corresponding effect of reducing impact force.

[0014] When the diverter 4 is disconnected from the pipeline and the gate valve body for maintenance, it can be easily slid out using the slide seat designed below, making it convenient for operators to remove the internal diverter plate for replacement. The designed base also improves the stability of this part of the gate valve body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a gate valve that is resistant to erosion and corrosion according to the present invention;

[0016] Figure 2 This is a schematic diagram of the diversion pipe structure of a gate valve that is resistant to erosion and corrosion according to this utility model;

[0017] Figure 3 This is a schematic diagram of the diverter plate structure of a gate valve that is resistant to erosion and corrosion proposed in this utility model.

[0018] In the diagram: 1. Base, 2. Pipe, 3. Gate valve body, 4. Diverter pipe, 5. Column, 6. Limit pin, 7. Handle, 8. Guide plate, 9. Slide, 10. Limit plate, 11. Diverter plate, 12. Diverter hole, 13. Fixing column. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3 A gate valve resistant to erosion and corrosion includes a gate valve body 3. One end of the gate valve body 3 is connected to a pipe 2. The gate valve body 3 has a corrosion-resistant coating, such as a chrome-plated or nickel-plated coating. The other end of the gate valve body 3 is connected to a diverter pipe 4, which is made of the same material as the gate valve body 3 to ensure the overall structural harmony and sealing. The other end of the diverter pipe 4 is connected to another pipe 2. The two pipes 2 are coaxial to ensure the stability of fluid transport. A column 5 is fixedly connected to the lower end of the gate valve body 3. The surface of the column 5 is chrome-plated, which not only prevents rust but also enhances its aesthetics. A base 1 is fixedly connected to the lower end of the column 5. The base 1 is made of cast iron, which is heavy and provides good stability. A sliding groove is provided through the side wall, and the inner wall of the sliding groove is lined with a wear-resistant polytetrafluoroethylene layer to extend its service life. A slide seat 9 is slidably connected in the sliding groove, and the bottom of the slide seat 9 is embedded with balls to reduce the sliding friction coefficient. A guide device is fixedly connected to the side wall of the slide seat 9. The guide device includes two guide plates 8 fixedly connected to the side wall of the slide seat 9. The two guide plates 8 are arranged on both sides of the guide plate 8 to form a symmetrical layout to ensure the balance of force. Sliding grooves are provided through the inner walls of the corresponding sliding grooves. The opening width of the sliding grooves is precisely calculated to provide a precise guide trajectory. The two guide plates 8 are slidably connected in the two sliding grooves respectively. The guide plates 8 and the sliding grooves adopt a clearance fit, which ensures flexibility and avoids excessive clearance.

[0021] The upper end of the slide 9 is connected to the lower end of the diversion pipe 4 via another column 5. A diversion device is slidably installed inside the diversion pipe 4. The surface of the diversion device is coated with a ceramic coating to effectively resist fluid erosion. The diversion device includes two diversion plates 11 slidably installed inside the diversion pipe 4. The two diversion plates 11 are connected by multiple fixing columns 13. Multiple diversion holes 12 are provided through the side walls of the two diversion plates 11. Four slots are provided through the inner wall of the diversion pipe 4 at corresponding positions. The slot entrance is provided with a guide slope to facilitate the installation of the limiting plate 10. The limiting plate 10 is magnetically fixed in each of the four slots. The slots are equipped with neodymium magnets as used in the prior art. The four limiting plates 10 are located in pairs on the side walls of the two diversion plates 11. The surface of the limiting plate 10 is covered with a rubber layer, which can both reduce shock and improve the sealing between it and the slot.

[0022] Specifically, a limit pin 6 is threaded through the upper end of the slide block 9, and the tail end of the limit pin 6 is threaded through the inner wall of the slide groove. A handle 7 is fixedly connected to the upper end of the slide block 9. The surface of the handle 7 is provided with anti-slip texture, so it is not easy to slip during operation.

[0023] Among them, the multiple diversion holes 12 on the side walls of the two diversion plates 11 do not overlap.

[0024] In this invention, when the fluid flows through the diversion pipe 4, the fluid velocity increases and the pressure decreases when it passes through the first diversion plate 11. Part of the kinetic energy is converted into turbulent dissipation. The multiple diversion holes 12 on the second diversion plate 11 are offset from the first plate, and the fluid needs to readjust its flow direction, further consuming kinetic energy and superimposing pressure drop, thereby reducing the overall average flow velocity. The pressure drop of the two diversion plates 11 is approximately added together, and the total resistance of the system increases significantly. When the fluid passes through the diversion plate 11, the kinetic energy is converted into heat energy through turbulence and friction, reducing the impact energy of the fluid on the downstream gate valve body 3, thereby achieving the corresponding effect of reducing impact force.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gate valve resistant to erosion and corrosion, comprising a gate valve body (3), characterized in that, One end of the gate valve body (3) is connected to a pipe (2), and the other end of the gate valve body (3) is connected to a diversion pipe (4). The other end of the diversion pipe (4) is connected to another pipe (2). A column (5) is fixedly connected to the lower end of the gate valve body (3). A base (1) is fixedly connected to the lower end of the column (5). A sliding groove is provided through the side wall of the base (1). A sliding seat (9) is slidably connected in the sliding groove. A guide device is fixedly connected to the side wall of the sliding seat (9). The upper end of the sliding seat (9) is connected to the lower end of the diversion pipe (4) through another column (5). A diversion device is slidably provided in the diversion pipe (4).

2. The erosion-resistant and corrosion-resistant gate valve according to claim 1, characterized in that, The guiding device includes two guide plates (8) fixedly connected to the side wall of the slide (9). The two guide plates (8) are arranged on both sides of the guide plate (8). The inner walls of the corresponding slides at the corresponding positions are provided with slide grooves. The two guide plates (8) are slidably connected in the two slide grooves respectively.

3. The erosion-resistant and corrosion-resistant gate valve according to claim 1, characterized in that, The diversion device includes two diversion plates (11) slidably disposed in the diversion pipe (4). The two diversion plates (11) are connected by multiple fixed columns (13). Multiple diversion holes (12) are provided through the side walls of the two diversion plates (11). Four slots are provided through the inner wall of the diversion pipe (4) at the corresponding positions. Limiting plates (10) are magnetically fixed in the four slots. The four limiting plates (10) are located in pairs on the side walls of the two diversion plates (11).

4. The erosion-resistant and corrosion-resistant gate valve according to claim 1, characterized in that, The upper end of the slide block (9) is threadedly connected to a limiting pin (6), and the tail end of the limiting pin (6) is threadedly connected to the inner wall of the slide groove.

5. The erosion-resistant and corrosion-resistant gate valve according to claim 3, characterized in that, The multiple diversion holes (12) on the sidewalls of the two diversion plates (11) do not overlap.

6. The erosion-resistant and corrosion-resistant gate valve according to claim 1, characterized in that, A handle (7) is fixedly connected to the upper end of the slide (9).

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