Scouring-resistant high-performance stop valve

Abstract

The utility model discloses a scouring-resistant high-performance stop valve which comprises a valve body and a valve cover, a flow inlet and a flow outlet are formed in the front end and the rear end of the valve body respectively, an upper valve cavity and a lower valve cavity are formed in the valve body respectively, a circulation opening is formed in the middle of the valve body in a penetrating mode, and the upper valve cavity and the lower valve cavity are distributed in a streamline mode. A valve seat is fixedly mounted on the inner wall of the circulation opening; a support is fixedly installed at the upper end of the valve cover, a transmission seat is fixedly installed in the middle of the upper end of the support, an internal thread transmission hole is formed in the middle of the transmission seat in a penetrating mode, a valve rod is connected to the inner wall of the internal thread transmission hole in a threaded mode, and a valve clack used for intercepting a valve seat is rotationally connected to the bottom of the valve rod through a rotating shaft. A cross-shaped circulation groove is formed in the lower end of the valve clack; a limiting ring groove is formed in the outer periphery of the upper end of the valve clack. According to the utility model, the washing resistance of the valve body is realized, and the sealing performance inside the valve body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, in particular to a globe valve with high erosion resistance and high performance. Background Technique

[0002] The globe valve is a commonly used type of valve, mainly used to cut off or connect the medium flow in the pipeline. Its working principle is to drive the valve flap to move up and down by rotating the valve stem, thereby controlling the opening or closing state of the valve. The axis of the valve stem of the globe valve is perpendicular to the valve seat sealing surface, so it is also called a straight-through valve or a closed-circuit valve.

[0003] The globe valve has the following main functions: Cutting off the fluid: This is the most basic function of the globe valve. By closing the valve, the fluid flow in the pipeline can be completely cut off, realizing the truncation of the medium. Adjusting the flow rate: Although the main function of the globe valve is to cut off the fluid, within a certain range, the fluid flow rate can also be adjusted by partially opening the valve. However, due to the large flow resistance of the globe valve, it is generally not used as the main valve for adjusting the flow rate. Changing the flow direction: In a specific pipeline system, the globe valve can also be used to change the flow direction of the fluid. This is usually set when considering various working conditions or operation requirements in the design of the pipeline system. Shunting or confluence: In some complex pipeline systems, the globe valve can also be used in combination with other valves to achieve the shunting or confluence of the fluid.

[0004] However, in actual use of the existing technology, in industries such as petroleum, chemical industry, water treatment, and energy, the fluid medium often has characteristics such as high pressure, high temperature, high flow rate, and containing solid particles, which pose extremely high requirements on the wear resistance, sealing performance, and overall performance of the globe valve. After long-term operation of the traditional globe valve, the erosion and wear of high-speed fluid and solid particles will affect the service life and sealing effect of the globe valve, thus easily affecting the stability and safety of the globe valve. Content of the Utility Model

[0005] The purpose of the utility model is to provide a globe valve with high erosion resistance and high performance, so as to solve the problems put forward in the above background technique that in industries such as petroleum, chemical industry, water treatment, and energy, the fluid medium often has characteristics such as high pressure, high temperature, high flow rate, and containing solid particles, which pose extremely high requirements on the wear resistance, sealing performance, and overall performance of the globe valve. After long-term operation of the traditional globe valve, the erosion and wear of high-speed fluid and solid particles will affect the service life and sealing effect of the globe valve, thus easily affecting the stability and safety of the globe valve.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: comprising a valve body and a valve cover, wherein the front and rear ends of the valve body are respectively provided with a flow inlet and a flow outlet, the interior of the valve body is respectively provided with an upper valve cavity and a lower valve cavity, a flow opening is provided through the middle of the valve body, the upper valve cavity and the lower valve cavity are distributed in a streamlined manner, and a valve seat is fixedly mounted on the inner wall of the flow opening;

[0007] A bracket is fixedly mounted on the upper end of the valve cover, a transmission seat is fixedly mounted on the middle part of the upper end of the bracket, an internal thread transmission hole is penetrated through the middle part of the transmission seat, a valve stem is threadedly connected to the inner wall of the internal thread transmission hole, a valve disc for intercepting the valve seat is rotatably connected to the bottom of the valve stem via a rotating shaft, and a cross flow groove is formed at the lower end of the valve disc;

[0008] A limiting ring groove is provided on the outer periphery of the upper end of the valve disc, a support spring is fixedly installed on the inner wall of the limiting ring groove, and a sealing ring is fixedly installed on the outer end of the support spring.

[0009] Preferably, the valve body is made of a high-strength, high-hardness and corrosion-resistant alloy material, and the interior of the valve body is sprayed with a wear-resistant and self-lubricating hard alloy coating.

[0010] Preferably, the valve cover is fixedly mounted on the upper end of the valve body.

[0011] Preferably, an external thread is provided on the outer curved surface of the upper end of the valve stem, a turning handle is fixedly mounted on the top end of the valve stem, and the bottom of the valve stem passes downward through the valve cover and extends to the inside of the valve body.

[0012] Preferably, the lower end of the valve flap is movably connected to the inner wall of the valve seat, and the valve seat and the valve flap are made of a rubber material that is resistant to high temperature, corrosion and has good elasticity.

[0013] Preferably, there are several supporting springs, which are symmetrically distributed on the inner wall of the limiting ring groove.

[0014] Preferably, the outer side of the sealing ring is movably connected to the inner wall of the limiting ring groove, and the sealing ring and the inner wall of the upper end of the valve seat fit together.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the fluid flows through the flow inlet, upper valve cavity, flow port, lower valve cavity and flow outlet in sequence, the hard alloy coating sprayed on the inside of the valve body can significantly improve the wear resistance, corrosion resistance and self-lubricating performance of the valve body, thereby extending the service life of the valve body and improving the operating efficiency. Secondly, the streamlined distribution of the upper and lower valve cavities can reduce the fluid resistance inside the valve body, further reducing the direct scouring of the fluid on the inside of the valve body, thereby improving the scouring resistance of the valve body.

[0017] 2. When the valve flap moves linearly downward, it will drive the cross-flow groove to move linearly downward. When the cross-flow groove moves linearly downward, the flow gap between the cross-flow groove and the valve seat will become smaller, reducing the internal flow rate of the valve body. At the same time, when the valve flap continues to move linearly downward, the upper end of the valve flap will fit and seal with the upper end of the valve seat to achieve the purpose of throttling. When the upper end of the valve flap fits and seals with the upper end of the valve seat, the limit ring groove will push the compression support spring outward. When the support spring is pushed and compressed outward, the elastic potential energy generated by the compression deformation of the support spring will always push the sealing ring outward, ensuring that the outer end of the sealing ring always fits and seals with the upper end of the valve seat, improving the sealing performance between the valve flap and the valve seat, and thus enhancing the erosion resistance of the valve body while increasing the internal sealing performance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of a high-performance erosion-resistant stop valve of the present invention;

[0019] Figure 2 is a sectional view of the overall structure of a high-performance erosion-resistant stop valve of the present invention;

[0020] Figure 3 is a sectional view of a partial structure of a high-performance erosion-resistant stop valve of the present invention.

[0021] In the figure: 1. Valve body; 2. Valve cover; 3. Flow inlet; 4. Flow outlet; 5. Upper valve cavity; 6. Lower valve cavity; 7. Flow port; 8. Valve seat; 9. Bracket; 10. Transmission seat; 11. Internal thread transmission hole; 12. Valve stem; 13. Valve flap; 14. Cross-flow groove; 15. Support spring; 16. Sealing ring; 17. Limit ring groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-3, the present utility model provides a technical solution for an erosion-resistant high-performance globe valve: including a valve body 1 and a valve cover 2, and the valve body 1 is made of an alloy material with high strength, high hardness and corrosion resistance. Flow inlets 3 and flow outlets 4 are respectively opened at the front and rear ends of the valve body 1, and an upper valve cavity 5 and a lower valve cavity 6 are respectively opened inside the valve body 1. Moreover, a wear-resistant and self-lubricating hard alloy coating is sprayed inside the valve body 1. The wear-resistant and self-lubricating hard alloy coating generally includes: tungsten carbide coating, tungsten nitride coating, titanium nitride coating and silicon carbide coating, so that the hard alloy coating resists the erosion and wear of high-speed fluid and solid particles. A flow-through port 7 is penetrated and opened in the middle of the valve body 1, so that the flow of the upper valve cavity 5 and the lower valve cavity 6 is carried out through the flow-through port 7. The upper valve cavity 5 and the lower valve cavity 6 are distributed in a streamline shape, so that the fluid resistance is reduced through the streamline distribution, and further reduces the direct erosion of the fluid on the inside of the valve body 1. A valve seat 8 is fixedly installed on the inner wall of the flow-through port 7;

[0024] The valve cover 2 is fixedly installed on the upper end of the valve body 1. A bracket 9 is fixedly installed on the upper end of the valve cover 2. A transmission seat 10 is fixedly installed in the middle of the upper end of the bracket 9. An internal thread transmission hole 11 is penetrated and opened in the middle of the transmission seat 10. A valve stem 12 is threadedly connected to the inner wall of the internal thread transmission hole 11. Moreover, an external thread is opened on the outer curved surface of the upper end of the valve stem 12. A turning handle is fixedly installed at the upper top end of the valve stem 12. The bottom of the valve stem 12 extends downward through the valve cover 2 into the inside of the valve body 1. The bottom of the valve stem 12 is rotationally connected by a rotating shaft to a valve flap 13 for intercepting the flow of the valve seat 8. Moreover, the lower end of the valve flap 13 is fitted and movably connected to the inner wall of the valve seat 8. A cross-flow groove 14 is opened at the lower end of the valve flap 13, so that the flow is carried out through the cross-flow groove 14. The valve seat 8 and the valve flap 13 are made of a rubber material with high temperature resistance, corrosion resistance and good elasticity. The rubber material with high temperature resistance, corrosion resistance and good elasticity generally includes: fluororubber, silicone rubber and nitrile rubber;

[0025] A limiting ring groove 17 is opened on the outer periphery of the upper end of the valve flap 13. A support spring 15 is fixedly installed on the inner wall of the limiting ring groove 17. Moreover, the number of the support springs 15 is several, and they are symmetrically distributed in sequence on the inner wall of the limiting ring groove 17. An outer end of the support spring 15 is fixedly installed with a sealing ring 16. Moreover, the outer side of the sealing ring 16 is fitted and movably connected to the inner wall of the limiting ring groove 17. The sealing ring 16 fits with the inner wall of the upper end of the valve seat 8.

[0026] Working principle: When in use, when the valve body 1 of this utility model is opened, the fluid will flow through the flow inlet 3, the upper valve chamber 5, the flow port 7, the lower valve chamber 6 and the flow outlet 4 in sequence. When the fluid flows through the flow inlet 3, the upper valve chamber 5, the flow port 7, the lower valve chamber 6 and the flow outlet 4 in sequence, the wear resistance, corrosion resistance and self-lubricating performance inside the valve body 1 can be significantly improved through the cemented carbide coating sprayed inside the valve body 1, thereby prolonging the service life of the valve body 1 and improving the operation efficiency. Secondly, due to the streamline distribution of the upper valve chamber 5 and the lower valve chamber 6, the fluid resistance inside the valve body 1 can be reduced, and the direct erosion of the fluid on the inside of the valve body 1 can be further reduced, thereby realizing the function of improving the erosion resistance of the valve body 1;

[0027] At the same time, when it is necessary to intercept the flow inside the valve body 1, by rotating the turning handle, when the turning handle rotates, it will drive the valve stem 12 to rotate. When the valve stem 12 rotates, it will move downward in a straight line due to the acting force generated by the threaded connection between the outer curved surface at the upper end of the valve stem 12 and the inner wall of the internal threaded transmission hole 11. When the valve stem 12 moves downward in a straight line, it will drive the valve flap 13 to move downward in a straight line. When the valve flap 13 moves downward in a straight line, it will drive the cross-flow groove 14 to move downward in a straight line. When the cross-flow groove 14 moves downward in a straight line, the flow gap between the cross-flow groove 14 and the valve seat 8 will become smaller, making the internal flow of the valve body 1 smaller. At the same time, when the valve flap 13 continues to move downward in a straight line, the upper end of the valve flap 13 will be in sealing fit with the upper end of the valve seat 8 to achieve the purpose of flow interception. At the same time, when the upper end of the valve flap 13 is in sealing fit with the upper end of the valve seat 8, the limit ring groove 17 will push the compression support spring 15 outward. When the support spring 15 is pushed and compressed outward, due to the elastic potential energy generated by the compression deformation of the support spring 15, it will always keep pushing the sealing ring 16 outward, so that the outer end of the sealing ring 16 always remains in sealing fit with the upper end of the valve seat 8, improving the sealing performance between the valve flap 13 and the valve seat 8. Thus, while realizing the erosion resistance function of the valve body 1, the sealing performance inside the valve body 1 can be increased.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance erosion-resistant globe valve, characterized in that: The valve body (1) comprises a valve body (1) and a valve cover (2), wherein the front and rear ends of the valve body (1) are respectively provided with a flow inlet (3) and a flow outlet (4), an upper valve cavity (5) and a lower valve cavity (6) are respectively provided inside the valve body (1), a flow opening (7) is provided through the middle of the valve body (1), the upper valve cavity (5) and the lower valve cavity (6) are distributed in a streamlined manner, and a valve seat (8) is fixedly installed on the inner wall of the flow opening (7); A bracket (9) is fixedly mounted on the upper end of the valve cover (2), a transmission seat (10) is fixedly mounted on the middle portion of the upper end of the bracket (9), an internal thread transmission hole (11) is provided through the middle portion of the transmission seat (10), a valve stem (12) is threadedly connected to the inner wall of the internal thread transmission hole (11), a valve flap (13) for intercepting flow from the valve seat (8) is rotatably connected to the bottom of the valve stem (12) via a rotating shaft, and a cross flow groove (14) is provided at the lower end of the valve flap (13); A limiting ring groove (17) is provided on the outer periphery of the upper end of the valve disc (13), a support spring (15) is fixedly mounted on the inner wall of the limiting ring groove (17), and a sealing ring (16) is fixedly mounted on the outer end of the support spring (15).

2. The erosion-resistant high-performance globe valve according to claim 1, wherein: The valve body (1) is made of a high-strength, high-hardness and corrosion-resistant alloy material, and the interior of the valve body (1) is sprayed with a wear-resistant and self-lubricating hard alloy coating.

3. The erosion-resistant high-performance globe valve according to claim 2, characterized in that: The valve cover (2) is fixedly mounted on the upper end of the valve body (1).

4. The erosion-resistant high-performance globe valve according to claim 3, wherein: The outer curved surface of the upper end of the valve stem (12) is provided with an external thread, a turning handle is fixedly mounted on the top end of the valve stem (12), and the bottom of the valve stem (12) passes downward through the valve cover (2) and extends into the interior of the valve body (1).

5. The high-performance erosion-resistant globe valve according to claim 4, characterized in that: The lower end of the valve flap (13) is movably connected to the inner wall of the valve seat (8), and the valve seat (8) and the valve flap (13) are made of a rubber material that is resistant to high temperature, corrosion and has good elasticity.

6. The high-performance erosion-resistant globe valve according to claim 5, wherein: There are a plurality of support springs (15), which are symmetrically distributed in sequence along the inner wall of the limiting ring groove (17).

7. The high-performance erosion-resistant globe valve according to claim 6, wherein: The outer side of the sealing ring (16) is movably connected to the inner wall of the limiting ring groove (17), and the sealing ring (16) and the inner wall of the upper end of the valve seat (8) are in mutual fit.

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