Intelligent control knife-type cut-off gate valve

Abstract

The application relates to an intelligent control knife type cut-off gate valve, and relates to the field of valve devices, which comprises a valve body, a gate plate and a driving unit, the gate plate is slidingly installed in the valve body, the driving unit is fixedly installed at the top of the valve body, and the driving end of the driving unit is fixedly connected with the gate plate; a sealing groove matched with the gate plate is formed in the valve body, a position adjusting mechanism for adjusting the position of the gate plate is installed on the valve body, and a sealing surface is formed on the inner side wall of the sealing groove away from the position adjusting mechanism; a hard alloy sealing ring is formed on one side of the gate plate away from the position adjusting mechanism through surfacing, and the hard alloy sealing ring is abutted between the sealing surface and the gate plate. The hard alloy sealing ring formed on the side wall of the gate plate through surfacing can prolong the service life of the sealing structure of the gate plate.

Description

Technical Field

[0001] This application relates to the field of valve devices, and in particular to an intelligent control knife gate valve. Background Technology

[0002] Knife gate valves—also known as knife gate valves or knife slurry valves—were introduced to my country in the 1980s. In less than twenty years, their application has expanded from general fields to a wider range of industries. From coal preparation, wastewater disposal, and slag removal in mines and power plants, they have evolved into urban sewage treatment, and from general industrial pipelines to specialized pipeline systems in food, sanitation, and pharmaceutical industries. Ultra-thin knife gate valves, with their small size, low flow resistance, light weight, easy installation, and easy disassembly, have completely solved the problems of high flow resistance, heavy weight, difficult installation, and large footprint associated with ordinary gate valves, flat gate valves, ball valves, globe valves, regulating valves, and butterfly valves.

[0003] In existing technology, the common knife-type gate valve structure consists of a handwheel, gate, valve body, and valve seat. Furthermore, the sealing pair inside the valve body of a common gate valve typically employs a soft sealing structure.

[0004] However, since the working environment of knife gate valves is generally for shut-off and flow obstruction, the medium is generally viscous or contains impurities or hard particles. The soft sealing surface wears out more severely in the working environment, and its working cycle is not long. The valve sealing ring needs to be replaced regularly. Utility Model Content

[0005] Therefore, this application provides an intelligent control knife-type shut-off gate valve.

[0006] The intelligent control knife-type shut-off gate valve provided in this application adopts the following technical solution:

[0007] An intelligent control knife-type shut-off gate valve includes a valve body, a gate, and a drive unit. The gate is slidably installed in the valve body, and the drive unit is fixedly installed on the top of the valve body, with the drive end of the drive unit fixedly connected to the gate.

[0008] The valve body has a sealing groove adapted to the gate plate, and the valve body is equipped with a position adjustment mechanism for adjusting the position of the gate plate. The inner wall of the sealing groove away from the position adjustment mechanism is formed with a sealing surface.

[0009] A hard alloy sealing ring is welded onto the side of the gate away from the position adjustment mechanism, and the hard alloy sealing ring is pressed between the sealing surface and the gate.

[0010] By adopting the above technical solution, a hard alloy sealing ring, formed by overlay welding on the side wall of the gate, can achieve a sealing connection between the gate and the sealing surface, while also cooperating with the internal sealing surface of the valve body. The hard alloy sealing ring is hard and has higher strength and service life compared to soft sealing rings, and can withstand higher temperature and pressure values, effectively expanding the temperature and pressure operating range of the gate valve. Furthermore, because the valve body is equipped with a position adjustment mechanism, when the hard alloy sealing ring wears after prolonged operation, the operator can use the position adjustment mechanism to push the gate, making the gate fit against the sealing surface, thus restoring the sealing pressure ratio of the gate valve and ensuring the sealing reliability. When the medium in the valve's operating condition is viscous or has not been opened or closed for a long time, the operator can also adjust the position of the gate to increase the gap between the gate and the sealing surface, ensuring normal opening or closing of the valve. Because the valve body is equipped with a drive unit, the operator can automatically control the up and down movement of the gate to open or close the gate valve, improving the convenience of opening and closing the gate valve.

[0011] Preferably, the valve body has a plurality of adjusting screw holes through it, and the position adjusting mechanism includes a plurality of adjusting screws, which are respectively threaded into the adjusting screw holes, and the ends of the plurality of adjusting screws extending out of the adjusting screw holes abut against the side of the gate plate away from the sealing surface.

[0012] By adopting the above technical solution, the position of the gate can be adjusted by adjusting the length of the end of the adjusting bolt extending out of the adjusting screw hole.

[0013] Preferably, the lower edge of the gate on the side away from the sealing surface is provided with an inclined slope, which is inclined downward and inward.

[0014] By adopting the above technical solution, the inclined slope can reduce the occurrence of collisions between the gate and the internal structure of the valve body during the up-and-down movement driven by the drive unit.

[0015] Preferably, all adjusting screws are headless screws, and the end face of the headless screw away from the gate is provided with an internal hexagonal hole for connecting with external tools.

[0016] By adopting the above technical solution, the headless screw can prevent the bolt from being exposed outside the valve body, thus improving the compactness of the structure. At the same time, the internal hexagonal hole on the headless screw allows the operator to easily screw in or out the adjusting screw with the help of external tools.

[0017] Preferably, the drive unit includes a cylinder, a mounting bracket is bolted to the top of the valve body, the cylinder body is fixed to the top of the mounting bracket, and a through hole is provided on the mounting bracket for the piston rod of the cylinder to pass through, and the piston rod is fixedly connected to the gate.

[0018] By adopting the above technical solution, the cylinder retracts or extends the piston rod, which can drive the gate to move up and down, thereby achieving the technical effect of automatically controlling the opening or closing of the gate.

[0019] Preferably, the surface of the gate is coated with a nickel-based alloy layer.

[0020] By adopting the above technical solution, the nickel-based alloy layer on the surface of the gate can improve the corrosion resistance of the gate.

[0021] In summary, the intelligent control knife-type shut-off gate valve of this application has at least one of the following beneficial technical effects:

[0022] 1. The hard alloy sealing ring, which is formed by overlay welding and installed on the side wall of the gate, can cooperate with the sealing surface inside the valve body to achieve a sealing connection between the gate and the sealing surface. At the same time, the hard alloy sealing ring is hard and has higher strength and service life compared with soft sealing ring. It can also withstand higher temperature and pressure values, which can effectively improve the temperature and pressure operating range of the gate valve.

[0023] 2. Because the valve body is equipped with a position adjustment mechanism, when the hard alloy sealing ring wears down after prolonged operation, the operator can use the position adjustment mechanism to push the gate, making the gate fit against the sealing surface, thereby increasing the sealing pressure ratio of the gate valve and ensuring the reliability of the gate valve seal. When the medium in the valve's operating condition is relatively viscous or when it has not been opened or closed for a long time, the operator can also adjust the position of the gate to increase the gap between the gate and the sealing surface, ensuring the normal opening or closing of the valve.

[0024] 3. Since a drive unit is installed on the valve body, the operator can automatically control the gate plate to move up and down to open or close the gate valve, thereby improving the convenience of the operator in opening or closing the gate valve; Attached Figure Description

[0025] Figure 1 This is a schematic diagram of Embodiment 1 of this application used to illustrate the internal structure of a gate valve.

[0026] Figure 2 This is a schematic diagram of Embodiment 1 of this application used to illustrate the side structure of the gate valve.

[0027] Figure 3 This is an example of embodiment 1 of this application used for demonstration. Figure 1 Enlarged diagram of point A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Sealing groove; 12. Sealing surface; 13. Adjusting screw hole; 2. Gate; 21. Hard alloy sealing ring; 22. Inclined slope; 3. Mounting bracket; 4. Adjusting screw; 5. Cylinder; 51. Piston rod; 52. Limit switch. Detailed Implementation

[0029] The following combination Figures 1-3 This application will be described in further detail.

[0030] Example 1

[0031] This application discloses an intelligent control knife-type shut-off gate valve. (Refer to...) Figures 1-3 It mainly includes a valve body 1, a gate 2 and a drive unit. The gate 2 is slidably installed inside the valve body 1, and the drive unit is fixedly installed on the top of the valve body 1, with the drive end of the drive unit fixedly connected to the gate 2.

[0032] The surface of the gate 2 is coated with a nickel-based alloy layer. This nickel-based alloy layer on the surface of the gate 2 improves its corrosion resistance.

[0033] The valve body 1 has a sealing groove 11 that matches the gate 2. A position adjustment mechanism for adjusting the position of the gate 2 is installed on the valve body 1. A sealing surface 12 is formed on the inner wall of the sealing groove 11 away from the position adjustment mechanism. A hard alloy sealing ring 21 is welded onto the side of the gate 2 away from the position adjustment mechanism. The hard alloy sealing ring 21 is pressed between the sealing surface 12 and the gate 2.

[0034] The hard alloy sealing ring 21, which is formed by overlay welding and installed on the side wall of the gate 2, can cooperate with the sealing surface 12 inside the valve body 1 to achieve a sealing connection between the gate 2 and the sealing surface 12. At the same time, the hard alloy sealing ring 21 is hard and has higher strength and service life than soft sealing rings. It can also withstand higher temperature and pressure values, which can effectively improve the temperature and pressure range of the gate valve.

[0035] In addition, since a position adjustment mechanism is installed on the valve body 1, when the hard alloy sealing ring 21 wears out after the valve has been working for a long time, the operator can push the gate 2 through the position adjustment mechanism so that the gate 2 fits against the sealing surface 12, thereby increasing the sealing pressure ratio of the gate valve and ensuring the sealing reliability of the gate valve.

[0036] When the medium in which the valve is operating is relatively viscous or has not been opened or closed for a long time, the operator can also adjust the position of the gate 2 to increase the gap between the gate 2 and the sealing surface 12, so as to ensure the normal opening or closing of the valve.

[0037] Since a drive unit is installed on the valve body 1, the operator can automatically control the gate 2 to move up and down to open or close the gate valve, thereby improving the convenience of the operator in opening or closing the gate valve.

[0038] Reference Figure 2 The valve body 1 has several adjusting screw holes 13 extending through it. The position adjustment mechanism includes several adjusting screws 4, which are threaded into the adjusting screw holes 13. The ends of the adjusting screws 4 extending out of the adjusting screw holes 13 are pressed against the side of the gate plate 2 away from the sealing surface 12. By adjusting the length of the ends of the adjusting screws extending out of the adjusting screw holes 13, the position of the gate plate 2 can be adjusted.

[0039] It should be noted that in this embodiment, there are three adjusting screw holes 13 and three adjusting screws. One adjusting screw hole 13 is located in the center of the valve body 1, and the other two adjusting screw holes 13 are symmetrically arranged on both sides of the middle adjusting screw hole 13.

[0040] Reference Figure 1 and Figure 2 The lower edge of the gate 2 on the side away from the sealing surface 12 is provided with an inclined slope 22, which slopes downward and inward. The inclined slope 22 can reduce the occurrence of collisions between the gate 2 and the internal structure of the valve body 1 during the up-and-down movement driven by the drive unit.

[0041] Reference Figure 1 All adjusting screws 4 are headless screws. The headless screws prevent the bolt part from being exposed outside the valve body 1, thus improving the compactness of the structure.

[0042] Reference Figure 1 and Figure 2 In this embodiment, the driving unit is a cylinder 5 with a limit switch 52. The top of the valve body 1 is bolted to a mounting bracket 3. The cylinder body of the cylinder 5 is fixed to the top of the mounting bracket 3. The mounting bracket 3 has a through hole for the piston rod 51 of the cylinder 5 to pass through. The piston rod 51 is fixedly connected to the gate plate 2.

[0043] The retraction or extension of the piston rod 51 by the cylinder 5 can drive the gate 2 to move up and down, thereby achieving the technical effect of automatically controlling the opening or closing of the gate 2.

[0044] The implementation principle of an intelligent control knife-type shut-off gate valve according to an embodiment of this application is as follows: A hard alloy sealing ring 21, formed by welding, is installed on the side wall of the gate 2. This ring, in conjunction with the internal sealing surface 12 of the valve body 1, achieves a sealing connection between the gate 2 and the sealing surface 12. The hard alloy sealing ring 21 is hard and has higher strength and service life compared to soft sealing rings. It can also withstand higher temperature and pressure values, effectively expanding the temperature and pressure operating range of the gate valve. Furthermore, since a position adjustment mechanism is installed on the valve body 1, when the hard alloy sealing ring 21 wears after prolonged operation, the operator can use the position adjustment mechanism to push the gate 2, causing it to fit against the sealing surface 12, thereby increasing the sealing pressure ratio of the gate valve and ensuring its sealing reliability. When the medium in the valve's operating condition is viscous or the valve has not been opened or closed for a long time, the operator can also adjust the position of the gate 2 to increase the gap between the gate 2 and the sealing surface 12, ensuring the normal opening or closing of the valve. Since a drive unit is installed on the valve body 1, the operator can automatically control the gate 2 to move up and down to open or close the gate valve, thereby improving the convenience of the operator in opening or closing the gate valve.

[0045] Example 2

[0046] In this embodiment, the end face of the headless screw (adjusting screw) away from the gate plate has an internal hexagonal hole for connecting with external tools. The internal hexagonal hole on the headless screw allows the operator to easily screw the adjusting screw in or out using external tools.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intelligent control knife-type shut-off gate valve, characterized in that, It includes a valve body (1), a gate (2) and a drive unit. The gate (2) is slidably installed inside the valve body (1), and the drive unit is fixedly installed on the top of the valve body (1). The drive end of the drive unit is fixedly connected to the gate (2). The valve body (1) has a sealing groove (11) adapted to the gate (2). The valve body (1) is equipped with a position adjustment mechanism for adjusting the position of the gate (2). The inner wall of the sealing groove (11) away from the position adjustment mechanism is formed with a sealing surface (12). A hard alloy sealing ring (21) is welded onto the side of the gate (2) away from the position adjustment mechanism, and the hard alloy sealing ring (21) is pressed between the sealing surface (12) and the gate (2).

2. The intelligent control knife-type shut-off gate valve according to claim 1, characterized in that, The valve body (1) has several adjusting screw holes (13) through it. The position adjustment mechanism includes several adjusting screws (4). The several adjusting screws (4) are respectively threaded into the adjusting screw holes (13), and the ends of the several adjusting screws (4) extending out of the adjusting screw holes (13) abut against the side of the gate plate (2) away from the sealing surface (12).

3. The intelligent control knife-type shut-off gate valve according to claim 2, characterized in that, The lower edge of the gate (2) away from the sealing surface (12) is provided with an inclined slope (22), which is inclined downward and inward.

4. The intelligent control knife-type shut-off gate valve according to claim 3, characterized in that, The adjusting screws (4) are all headless screws, and the end face of the headless screw away from the gate (2) is provided with an internal hexagonal hole for connecting with external tools.

5. The intelligent control knife-type shut-off gate valve according to claim 1, characterized in that, The drive unit includes a cylinder (5), and a mounting bracket (3) is bolted to the top of the valve body (1). The cylinder body of the cylinder (5) is fixed to the top of the mounting bracket (3). A through hole is provided on the mounting bracket (3) for the piston rod (51) of the cylinder (5) to pass through. The piston rod (51) is fixedly connected to the gate (2).

6. The intelligent control knife-type shut-off gate valve according to claim 1, characterized in that, The surface of the gate (2) is coated with a nickel-based alloy layer.

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