Metal seal high temperature and high pressure wear-resistant regulating valve

Abstract

The utility model provides a kind of metal seal high temperature high pressure wear-resistant regulating valve, belong to valve body technical field, including valve assembly and sealing assembly, valve assembly includes valve body, the inside of valve body is perforated and is equipped with flow channel, the utility model: the inside of valve body is perforated and is equipped with flow channel for the conveying flow of medium, flow channel inside is equipped with valve seat, the inside of valve seat is equipped with sphere, when servo motor rotates, the valve stem connected with output end is rotated, the valve stem rotation drives the sphere connected with bottom to rotate in valve seat inside, so that sphere opens and closes control the switch of flow channel, the surface of valve seat and sphere is equipped with thermal spraying hard alloy coating, so as to improve corrosion resistance and erosion resistance, extend valve body service life, reduce valve body failure rate.

Description

Technical Field

[0001] This utility model relates to the field of valve body technology, specifically to a metal-sealed high-temperature, high-pressure, wear-resistant regulating valve. Background Technology

[0002] In industries such as petrochemicals, metallurgy, and power, control valves, as core equipment for fluid control, often operate under harsh conditions of high temperature, high pressure, and media containing solid particles or corrosive components. In these environments, the sealing performance, wear resistance, and structural stability of the control valve directly determine the safety, continuity, and economy of production. Currently, traditional control valves mostly employ soft-seal structures, which provide good sealing at normal temperature and pressure, but are prone to aging, deformation, and even carbonization at high temperatures, leading to seal failure. While conventional metal-sealed control valves can withstand high temperatures, they suffer from insufficient sealing precision and poor wear resistance. When the medium contains solid particles, the sealing surface is easily eroded and worn, leading to leakage in a short period. This not only increases equipment maintenance costs but may also cause safety accidents. Utility Model Content

[0003] The purpose of this invention is to provide a metal-sealed, high-temperature, high-pressure, wear-resistant regulating valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a metal-sealed high-temperature and high-pressure wear-resistant regulating valve, comprising a valve assembly and a sealing assembly; Wherein: the valve assembly includes a valve body, the valve body has a flow channel that runs through it, the flow channel has a valve seat inside it, the valve seat is cast, the valve seat has a ball inside it, the surfaces of the valve seat and the ball are coated with a thermally sprayed hard alloy coating, the top of the valve body is rotatably mounted with a valve stem, one end of the valve stem is fixedly connected to the ball, and the other end of the valve stem is connected to a servo motor; The sealing assembly includes an annular groove formed on the surface of the valve stem near the ball end, with embedded grooves formed at both ends of the annular groove on the surface of the valve stem, a PTFE sealing strip fitted on the surface of the annular groove, and a sealing ring fitted inside the annular groove at both ends.

[0005] As a preferred embodiment of this utility model: a mounting sleeve is fixedly installed on the top of the valve body, the valve stem is inserted inside the mounting sleeve, a flange is fixedly connected to the top of the mounting sleeve, and heat sinks are fixedly installed on the surface of the mounting sleeve.

[0006] As a preferred embodiment of this utility model, the heat sink is arranged in multiple vertically along the mounting sleeve.

[0007] As a preferred embodiment of this utility model: the bottom of the mounting sleeve is connected to a seat ring, the surface of the seat ring is engraved with scale lines, the bottom surface of the mounting sleeve is provided with an arc-shaped groove, and the surface of the valve stem is equipped with a pointer, which corresponds to the scale lines.

[0008] As a preferred embodiment of this utility model: the bottom of the servo motor is equipped with a docking flange, and both the flange and the docking flange have connection holes on their surfaces, with fixing bolts threaded into the connection holes.

[0009] As a preferred embodiment of this utility model, the valve body is connected to mounting flanges at both ends.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) A flow channel is provided inside the valve body for the transport and flow of the medium. A valve seat is provided inside the flow channel, and a ball is provided inside the valve seat. When the servo motor rotates, it drives the valve stem connected to the output end to rotate. The rotation of the valve stem drives the ball connected to the bottom to rotate inside the valve seat, so that the ball opens and closes to control the opening and closing of the flow channel. The surfaces of the valve seat and the ball are coated with a thermal spray hard alloy coating, which improves the corrosion resistance and erosion resistance, extends the service life of the valve body, and reduces the failure rate of the valve body. (2) An annular groove is provided on the surface of the valve stem near the ball. An embedded groove is provided at both ends of the annular groove. The PTFE sealing strip is fitted on the surface of the annular groove. The PTFE sealing strip has the characteristics of low friction coefficient, chemical corrosion resistance and high resilience. It can meet the use requirements at higher temperatures. At the same time, it is pressure resistant and inert to strong alkalis, strong acids and organic solvents. In addition, a sealing ring is embedded in the inside of the embedded groove, so that a double-layer auxiliary seal is formed at both ends of the PTFE sealing strip, which improves the sealing effect and makes the valve stem and valve body have good sealing performance, so as to meet the needs of various media transportation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the valve assembly structure of this utility model; Figure 3 This is a schematic diagram of the sealing assembly structure of this utility model; Figure 4 This is a schematic diagram of the heat sink installation structure of this utility model.

[0012] In the diagram: 1. Valve assembly; 101. Valve body; 102. Flow channel; 103. Valve seat; 104. Ball; 105. Thermally sprayed hard alloy coating; 106. Valve stem; 107. Servo motor; 2. Sealing assembly; 21. Annular groove; 22. Embedded groove; 23. PTFE sealing tape; 24. Sealing ring; 3. Mounting sleeve; 4. Flange; 5. Heat sink; 6. Seat ring; 7. Scale mark; 8. Arc groove; 9. Pointer; 10. Connecting flange; 11. Connecting hole; 12. Mounting flange. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Please see Figure 1 - Figure 4 A metal-sealed high-temperature, high-pressure, wear-resistant regulating valve includes: a valve assembly 1 and a sealing assembly 2; Please see Figure 1 , Figure 2 The valve assembly 1 includes a valve body 101, with a flow channel 102 extending through the interior of the valve body 101. A valve seat 103 is provided inside the flow channel 102. The valve seat 103 is cast, and a ball 104 is provided inside the valve seat 103. Both the surface of the valve seat 103 and the ball 104 are coated with a thermally sprayed hard alloy coating 105. A valve stem 106 is rotatably mounted on the top of the valve body 101. One end of the valve stem 106 is fixedly connected to the ball 104, and the other end of the valve stem 106 is connected to a servo motor 107.

[0015] In practical use: A flow channel 102 is provided through the inside of the valve body 101 for the transportation and flow of the medium. A valve seat 103 is provided inside the flow channel 102, and a ball 104 is provided inside the valve seat 103. When the servo motor 107 rotates, it drives the valve stem 106 connected to the output end to rotate. The rotation of the valve stem 106 drives the ball 104 connected to the bottom to rotate inside the valve seat 103, so that the ball 104 opens and closes to control the opening and closing of the flow channel 102. The surfaces of the valve seat 103 and the ball 104 are coated with a thermally sprayed hard alloy coating 105, which improves the corrosion resistance and erosion resistance, extends the service life of the valve body 101, and reduces the failure rate of the valve body 101.

[0016] Please see Figure 2 , Figure 3The sealing assembly 2 includes an annular groove 21 formed on the surface of the valve stem 106 near one end of the ball 104. The surface of the valve stem 106 has embedded grooves 22 at both ends of the annular groove 21. The surface of the annular groove 21 is fitted with a PTFE sealing strip 23. A sealing ring 24 is fitted inside the annular groove 21 at both ends.

[0017] In practical use: An annular groove 21 is provided on the surface of the valve stem 106 near the end of the ball 104. An embedded groove 22 is provided at both ends of the annular groove 21. The PTFE sealing strip 23 is fitted onto the surface of the annular groove 21. The PTFE sealing strip 23 has the characteristics of low friction coefficient, chemical corrosion resistance and high resilience. It can meet the use requirements at higher temperatures. At the same time, it is pressure resistant and inert to strong alkalis, strong acids and organic solvents. At the same time, a sealing ring 24 is also embedded in the inside of the embedded groove 22, so that a double-layer auxiliary seal is formed at both ends of the PTFE sealing strip 23, which improves the sealing effect and gives the valve stem 106 and valve body 101 good sealing performance, making it suitable for various media transportation needs.

[0018] Please see Figure 4 A mounting sleeve 3 is fixedly installed on the top of the valve body 101. The valve stem 106 is inserted inside the mounting sleeve 3. A flange 4 is fixedly connected to the top of the mounting sleeve 3. A heat sink 5 is fixedly installed on the surface of the mounting sleeve 3. Multiple heat sinks 5 are arranged vertically along the mounting sleeve 3.

[0019] In practical use: A mounting sleeve 3 is fixedly installed on the top of the valve body 101, and a flange 4 is fixedly connected to the top of the mounting sleeve 3. The valve stem 106 is inserted inside the mounting sleeve 3. Multiple heat sinks 5 are vertically arranged on the surface of the mounting sleeve 3, so that when conveying high-temperature media, the heat of the valve body 101 is dissipated to the outside through the heat sinks 5 on the surface of the mounting sleeve 3, thereby cooling the valve body 101.

[0020] Please see Figure 4 The bottom of the mounting sleeve 3 is connected to a seat ring 6, the surface of the seat ring 6 is engraved with scale lines 7, the bottom surface of the mounting sleeve 3 is provided with an arc groove 8, and the surface of the valve stem 106 is equipped with a pointer 9, which corresponds to the scale lines 7.

[0021] In practical use: The bottom of the mounting sleeve 3 is connected to a seat ring 6, and the surface of the seat ring 6 is engraved with scale lines 7. The bottom surface of the mounting sleeve 3 is provided with an arc groove 8. When the valve stem 106 rotates, the pointer 9 on the surface moves inside the arc groove 8 and corresponds to the scale line 7, so that the opening degree of the valve body 101 can be known by the position of the pointer 9 and the scale line 7.

[0022] Please see Figure 4 The bottom of the servo motor 107 is equipped with a docking flange 10. Both the flange 4 and the docking flange 10 have connection holes 11 on their surfaces, and the connection holes 11 are threaded with fixing bolts.

[0023] In practical use: The bottom of the servo motor 107 is equipped with a docking flange 10. The flange 4 and the surface of the docking flange 10 are respectively provided with connection holes 11. When the servo motor 107 is connected to the flange 4 through the docking flange 10, the fixing bolts are connected in the connection holes 11 to facilitate the installation and fixing of the servo motor 107.

[0024] Please see Figure 1 The valve body 101 has mounting flanges 12 connected to both ends.

[0025] In practical use: both ends of the valve body 101 are connected to mounting flanges 12, which facilitate connection with the conveying pipeline.

[0026] A flow channel 102 is provided inside the valve body 101 for the transport and flow of the medium. A valve seat 103 is provided inside the flow channel 102, and a ball 104 is provided inside the valve seat 103. When the servo motor 107 rotates, it drives the valve stem 106 connected to the output end to rotate. The rotation of the valve stem 106 drives the ball 104 connected to the bottom to rotate inside the valve seat 103, so that the ball 104 opens and closes to control the opening and closing of the flow channel 102. The surfaces of the valve seat 103 and the ball 104 are coated with a thermally sprayed hard alloy coating 105, which improves the corrosion resistance and erosion resistance, extends the service life of the valve body 101, and reduces the failure rate of the valve body 101.

[0027] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention 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 make equivalent substitutions for some of the technical features. 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 metal-sealed, high-temperature, high-pressure, wear-resistant regulating valve, characterized in that, The system includes a valve assembly (1), which includes a valve body (101). A flow channel (102) is provided through the interior of the valve body (101). A valve seat (103) is provided inside the flow channel (102). The valve seat (103) is cast. A ball (104) is provided inside the valve seat (103). The surfaces of the valve seat (103) and the ball (104) are both coated with a thermally sprayed hard alloy coating (105). A valve stem (106) is rotatably mounted on the top of the valve body (101). One end of the valve stem (106) is fixedly connected to the ball (104), and the other end of the valve stem (106) is connected to a servo motor (107). The sealing assembly (2) includes an annular groove (21) formed on the surface of the valve stem (106) near the end of the ball (104). The valve stem (106) has embedded grooves (22) at both ends of the annular groove (21). The surface of the annular groove (21) is covered with a PTFE sealing strip (23). Both ends of the annular groove (21) are covered with sealing rings (24).

2. The regulating valve according to claim 1, characterized in that: The valve body (101) is fixedly fitted with an installation sleeve (3), the valve stem (106) is inserted inside the installation sleeve (3), the top of the installation sleeve (3) is fixedly connected with a flange (4), and the surface of the installation sleeve (3) is fixedly fitted with a heat sink (5).

3. The regulating valve according to claim 2, characterized in that: The heat sink (5) is arranged vertically along the mounting sleeve (3) in multiple ways.

4. The regulating valve according to claim 2, characterized in that: The bottom of the mounting sleeve (3) is connected to a seat ring (6), the surface of the seat ring (6) is engraved with scale lines (7), the bottom surface of the mounting sleeve (3) is provided with an arc groove (8), and the surface of the valve stem (106) is equipped with a pointer (9), which corresponds to the scale lines (7).

5. The regulating valve according to claim 2, characterized in that: The bottom of the servo motor (107) is equipped with a docking flange (10). Both the flange (4) and the docking flange (10) have connection holes (11) on their surfaces. The connection holes (11) are threaded with fixing bolts.

6. The regulating valve according to claim 1, characterized in that: The valve body (101) is connected to mounting flanges (12) at both ends.

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