Novel black water angle valve

Abstract

The utility model relates to the technical field of coal gasification devices, and discloses a novel black water angle valve which comprises a valve body, a valve seat is fixedly installed on the left side of the valve body, a valve cover is fixedly installed on the right side of the valve body, a valve rod guide sleeve is fixedly installed in the valve cover, and a valve element and valve rod assembly is movably installed in the valve rod guide sleeve. Through the arrangement of the curvature of the inlet of the side pipe of the valve body, the uniform flowing of a fluid matrix is ensured, and through the matching of the sealing surface of the valve seat and the sealing surface of the valve core head, a flow shrinkage section is gradually formed before a medium enters a throttling opening, compared with a traditional device, when the device is used, the fluid medium flows smoothly in the valve body without a corner, and the flow shrinkage section is not damaged. Direct scouring of solid particles can be effectively avoided, pressure reduction can be generated before fluid media enter the throttling opening, the burden of the throttling opening is relieved, the service life is prolonged, and vibration and noise can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of coal gasification devices, and more specifically, to a novel black water angle valve. Background Technology

[0002] The black water angle valve is a special valve specifically designed for use in coal chemical plants. It is mainly used to regulate or control the pressure, level, and flow rate of media such as black water.

[0003] However, when using current black water angle valves, the internal medium is a complex fluid composed of three phases: gas, liquid, and solid. The content and hardness of solid particles in the fluid are also relatively high. These particles have strong kinetic energy when flowing at high speed, which causes severe scouring and damage to the valve core, valve seat, and downstream pipeline. Especially at the throttling orifice, the flow velocity increases when the fluid passes through the constriction section, and the scouring effect is more significant. This often leads to wear and failure of key components such as valve core and valve seat, resulting in a short service life.

[0004] Furthermore, due to the characteristics of coal chemical processes, the medium temperature may reach hundreds of degrees Celsius, and there is a large pressure difference across the valve. This high-temperature and high-pressure environment will intensify the scouring effect of the medium, causing the valve core and stem to vibrate under the impact of the medium, or even break, severely shortening the service life of the valve. Therefore, it is necessary to improve and optimize it. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a new type of black water angle valve, which has the advantages of reducing scouring damage and having a long service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel black water angle valve, comprising a valve body, a valve seat fixedly installed on the left side of the valve body, a valve cover fixedly installed on the right side of the valve body, a valve stem guide sleeve fixedly installed inside the valve cover, a valve core and valve stem assembly movably installed inside the valve stem guide sleeve, a valve cavity guide sleeve fixedly installed inside the valve body, the valve core and valve stem assembly movably installed inside the valve stem guide sleeve and the valve cavity guide sleeve, a diffuser section provided on the left side of the valve seat, the side pipe inlet curvature of the valve body being R150, the valve seat being inlaid with tungsten carbide, and the right end of the valve seat being a conical sealing surface with an angle of 150°;

[0007] The valve core and valve stem assembly includes a valve core head, a valve core seat, a valve stem, a connecting bolt, and a cylindrical pin. The valve stem is movably installed inside the valve stem guide sleeve. The left side of the valve stem is threadedly connected to the valve core seat and then fully welded. The left side of the valve core seat and the valve core head are threadedly connected by a connecting bolt. The cylindrical pin passes through the connecting bolt and the valve core seat and is then welded. The sealing surface angle of the valve core head is 120°.

[0008] As a preferred embodiment of this utility model, a packing gasket is fixedly provided between the inside of the valve cover and the valve core and valve stem assembly. The right side of the packing gasket is filled with packing material, and a valve stem guide sleeve is fixedly installed on the left side of the packing gasket. An annular scraper is provided inside the valve stem guide sleeve, and the valve stem guide sleeve is located on the outer wall of the valve stem.

[0009] As a preferred embodiment of this utility model, the valve cavity guide sleeve is located on the outer wall of the valve core seat, and the interior of the valve cavity guide sleeve is provided with three layers of scrapers.

[0010] As a preferred embodiment of this utility model, a first scraper is fixedly installed on the right side inside the valve cavity guide sleeve, a third scraper is fixedly installed on the left side inside the valve cavity guide sleeve, and a second scraper is fixedly installed between the first scraper and the third scraper.

[0011] As a preferred embodiment of the present invention, the first scraper is an annular flange, the second scraper and the third scraper are spaced-apart flanges, and the flange heights of the second scraper and the third scraper are slightly lower than those of the first scraper.

[0012] As a preferred technical solution of this utility model, the gap between the flange of the first scraper and the valve core seat is extremely small, which plays the role of scraping off the adhering material. The flanges of the second and third scrapers are arranged alternately to ensure that no dead corners are left.

[0013] As a preferred embodiment of this utility model, the valve seat and the diffuser section are detachably installed, the diffuser section is embedded with tungsten carbide, and the internal angle of the diffuser section is 6°.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model ensures uniform flow of the fluid matrix by setting the curvature of the valve body side pipe inlet. Through the cooperation of the valve seat sealing surface and the valve core head sealing surface, the medium gradually forms a narrowing section before entering the throttling orifice. Compared with traditional devices, this device allows the fluid medium to flow smoothly inside the valve body without corners during use, effectively preventing solid particles from directly scouring the system. Furthermore, the fluid medium can experience pressure reduction before entering the throttling orifice, reducing the burden on the orifice, improving its service life, and also reducing vibration and noise.

[0016] 2. This utility model, through the design of the valve stem guide sleeve and the internal scraper of the valve cavity guide sleeve, thoroughly removes the deposited substances on the outer wall of the valve core and valve stem assembly, avoiding blockage caused by deposit condensation and improving the smoothness of the valve core and valve stem assembly. The detachable design of the diffuser section not only facilitates maintenance but also protects the downstream pipeline, improving stability and service life. Compared with traditional devices, this device has a smoother valve core and valve stem assembly operation and a more robust structure. When conveying internal media, it can effectively protect the downstream pipeline and improve durability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the valve seat structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the valve stem structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the valve stem guide sleeve structure of this utility model;

[0021] Figure 5 This is a cross-sectional view of the valve cavity guide sleeve of this utility model;

[0022] Figure 6 This is a schematic diagram of the valve cavity guide sleeve structure of this utility model;

[0023] Figure 7 This is a pressure distribution diagram when the opening of a traditional valve is 30%.

[0024] Figure 8 This is a pressure distribution diagram when the valve opening of this utility model is 30%.

[0025] Figure 9 This is a pressure distribution diagram when the opening of a traditional valve is 20%.

[0026] Figure 10 This is a pressure distribution diagram when the valve opening of this utility model is 20%.

[0027] Figure 11 Pressure distribution when the valve opening is 10% (as in traditional valves);

[0028] Figure 12 This is a pressure distribution diagram when the valve opening of this utility model is 10%.

[0029] Figure 13 A schematic diagram showing the velocity and static pressure when the opening of a traditional valve is 30%.

[0030] Figure 14 This is a schematic diagram showing the speed and static pressure when the valve opening is 30% according to this utility model;

[0031] Figure 15 A schematic diagram showing the velocity and static pressure of a conventional valve when the valve opening is 20%.

[0032] Figure 16 This is a schematic diagram showing the velocity and static pressure when the valve opening of this utility model is 20%.

[0033] Figure 17 A schematic diagram showing the velocity and static pressure of a conventional valve when the valve opening is 10%.

[0034] Figure 18 This is a schematic diagram showing the speed and static pressure when the valve opening of this utility model is 30%.

[0035] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve core and stem assembly; 3a. Valve core head; 3b. Valve core seat; 3c. Valve stem; 3d. Connecting bolt; 3e. Cylindrical pin; 4. Valve stem guide sleeve; 5. Valve cavity guide sleeve; 6. Diffuser section; 7. Valve cover; 8. Packing gasket; 9. Packing; 10. First scraper; 11. Second scraper; 12. Third scraper. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] like Figures 1 to 18 As shown, this utility model provides a novel black water angle valve, including a valve body 1, a valve seat 2 fixedly installed on the left side of the valve body 1, a valve cover 7 fixedly installed on the right side of the valve body 1, a valve stem guide sleeve 4 fixedly installed inside the valve cover 7, a valve core valve stem assembly 3 movably installed inside the valve stem guide sleeve 4, a valve cavity guide sleeve 5 fixedly installed inside the valve body 1, and the valve core valve stem assembly 3 movably installed inside the valve stem guide sleeve 4 and the valve cavity guide sleeve 5. A diffuser section 6 is provided on the left side of the valve seat 2, the curvature of the side pipe inlet of the valve body 1 is R150, the fluid flow in the valve cavity is uniform, the valve seat 2 is inlaid with tungsten carbide, and the right end of the valve seat 2 is a conical sealing surface with an angle of 150°.

[0038] The valve core and stem assembly 3 includes a valve core head 3a, a valve core seat 3b, a valve stem 3c, a connecting bolt 3d, and a cylindrical pin 3e. The valve core head 3a is made of tungsten carbide, while the valve stem 3c and valve core seat 3b are made of ordinary materials and are made of different sizes, which saves material and processing costs. The valve stem 3c is movably installed inside the valve stem guide sleeve 4. The left side of the valve stem 3c is threaded and fully welded to the valve core seat 3b. The left side of the valve core seat 3b and the valve core head 3a are threaded together by the connecting bolt 3d, and the cylindrical pin 3e penetrates into the connecting bolt 3d and the valve core seat 3b before being welded. This connection makes the entire valve core and stem assembly 3 relatively stable, resistant to vortexes and impacts. The sealing surface angle of the valve core head 3a is 120°.

[0039] When the device is put into use, when the high-temperature and high-pressure medium enters the valve body 1, the curvature of the side pipe inlet of the valve body 1 is R150. This curvature allows the fluid to flow uniformly within the flow channel, preventing flashing on one side of the outlet wall of the valve body 1. Furthermore, since flashing mainly occurs at the throttling annular wall, the pressure recovers rapidly after passing the throttling surface, shortening the length of the pipe wall where cavitation occurs, reducing erosion on the valve seat 2 wall, and extending the life of the valve seat 2. Additionally, the throttling orifice between the valve body 1 and the valve seat 2 is tightly sealed. The cone angle of the cover is 150°, and the lines of the valve body 1 valve cavity are smoothly connected, which can effectively prevent solid particles from directly scouring. Similarly, the sealing surface angle of the valve core head 3a is increased from 80° to 120°. Through the cooperation of the sealing surface of the valve seat 2 and the sealing surface of the valve core head 3a, the medium gradually forms a narrowing section before entering the throttling port. After the fluid enters the valve cavity through the cone surface of the valve seat 2, it passes smoothly through the throttling port without any corners, and the flow is smooth. Pressure reduction begins before the throttling port, reducing scouring.

[0040] By setting the curvature of the side pipe inlet of valve body 1, uniform flow of the fluid matrix is ​​ensured. With the cooperation of the sealing surface of valve seat 2 and the sealing surface of valve core head 3a, the medium gradually forms a narrowing section before entering the throttling orifice. Compared with traditional devices, this device allows the fluid medium to flow smoothly inside valve body 1 without corners during use, effectively preventing direct scouring by solid particles. Furthermore, the fluid medium can experience pressure reduction before entering the throttling orifice, reducing the burden on the throttling orifice, improving service life, and also reducing vibration and noise.

[0041] Among them, such as Figures 7-18 As shown, since the valve scouring and vibration are more severe when the valve is at a small opening, the openings of 30%, 20%, and 10% were compared to simulate the actual working conditions. The pressure and velocity distribution diagrams under different openings were obtained. After verification, it was found that the pressure and velocity of this invention are significantly reduced during use, thus ensuring the service life of the device.

[0042] A packing gasket 8 is fixedly installed inside the valve cover 7 and between the valve core and valve stem assembly 3. A packing 9 is filled on the right side of the packing gasket 8, and a valve stem guide sleeve 4 is fixedly installed on the left side of the packing gasket 8. An annular scraper is provided inside the valve stem guide sleeve 4, and the valve stem guide sleeve 4 is located on the outer wall of the valve stem 3c.

[0043] By adding a valve stem guide sleeve 4 to the left side of the packing gasket 8 and packing 9, the scraper inside the valve stem guide sleeve 4 removes solid particles adhering to the valve stem 3c, preventing damage to the packing 9.

[0044] The design of the internal scrapers in the valve stem guide sleeve 4 and valve cavity guide sleeve 5 thoroughly removes the deposits on the outer wall of the valve core and valve stem assembly 3, avoiding blockage caused by deposit condensation and improving the smoothness of the valve core and valve stem assembly 3. The detachable design of the diffuser section 6 not only facilitates maintenance but also protects the downstream pipeline, improving stability and service life. Compared with traditional devices, this device has a smoother valve core and valve stem assembly 3 operation and a more robust structure. When conveying internal media, it can effectively protect the downstream pipeline and improve durability.

[0045] Among them, the valve cavity guide sleeve 5 is located on the outer wall of the valve core seat 3b, and the valve cavity guide sleeve 5 is provided with three layers of scrapers inside.

[0046] Because the medium flow rate at the throttling orifice is fast while the medium flow rate in the valve cavity is slow during the operation of the device, it is easy for the medium to deposit and condense on the valve core seat 3b. Therefore, the valve cavity guide sleeve 5 is set on the outer wall of the valve core seat 3b.

[0047] The first scraper 10 is fixedly installed on the right side inside the valve cavity guide sleeve 5, the third scraper 12 is fixedly installed on the left side inside the valve cavity guide sleeve 5, and the second scraper 11 is fixedly installed between the first scraper 10 and the third scraper 12.

[0048] The three-layer scraper design ensures thorough descaling.

[0049] The first scraper 10 has an annular flange, the second scraper 11 and the third scraper 12 have spaced flanges, and the flange heights of the second scraper 11 and the third scraper 12 are slightly lower than those of the first scraper 10.

[0050] The first scraper 10 has the highest flange height, and the gap between it and the valve core seat 3b is small. It is a continuous flange that is responsible for supporting and guiding the operation. The upper and lower edges of the flange are perpendicular to the inner wall of the valve cavity guide sleeve 5, which plays the role of scraping off the adhering substances.

[0051] The first scraper 10 has a very small gap between its flange and the valve core seat 3b, which serves to scrape off the adhering material. The flanges of the second scraper 11 and the third scraper 12 are arranged in an alternating manner to ensure that no dead corners are left.

[0052] The flanges of the second scraper 11 and the third scraper 12 are slightly lower than those of the first scraper 10 and are staggered to ensure that particles adhering to the outer wall of the valve core seat 3b can be scraped off, thus preventing the deposition of deposits.

[0053] The valve seat 2 and the diffuser section 6 are detachably installed. The diffuser section 6 is embedded with tungsten carbide, and the internal angle of the diffuser section 6 is 6°.

[0054] The valve seat 2 and diffuser section 6 are designed to be detachable, which facilitates separate maintenance in the future. The angle design of the diffuser section 6 ensures that cavitation occurs in the diffuser section, effectively preventing the pipeline downstream of the valve from being damaged by cavitation.

[0055] Working principle and usage process of this utility model:

[0056] When the device is put into use, when the high-temperature and high-pressure medium enters the valve body 1, the curvature of the side pipe inlet of the valve body 1 is R150. This curvature allows the fluid to flow uniformly within the flow channel, preventing flashing on one side of the outlet wall of the valve body 1. Furthermore, since flashing mainly occurs at the throttling annular wall, the pressure recovers rapidly after passing the throttling surface, shortening the length of the pipe wall where cavitation occurs, reducing erosion on the valve seat 2 wall, and extending the life of the valve seat 2. Additionally, the throttling orifice between the valve body 1 and the valve seat 2 is tightly sealed. The cone angle of the cover is 150°, and the lines of the valve body 1 valve cavity are smoothly connected, which can effectively prevent solid particles from directly scouring. Similarly, the sealing surface angle of the valve core head 3a is increased from 80° to 120°. Through the cooperation of the sealing surface of the valve seat 2 and the sealing surface of the valve core head 3a, the medium gradually forms a narrowing section before entering the throttling port. After the fluid enters the valve cavity through the cone surface of the valve seat 2, it passes smoothly through the throttling port without any corners, and the flow is smooth. Pressure reduction begins before the throttling port, reducing scouring.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel black water angle valve, comprising a valve body (1), characterized in that: A valve seat (2) is fixedly installed on the left side of the valve body (1), and a valve cover (7) is fixedly installed on the right side of the valve body (1). A valve stem guide sleeve (4) is fixedly installed inside the valve cover (7). A valve core valve stem assembly (3) is movably installed inside the valve stem guide sleeve (4). A valve cavity guide sleeve (5) is fixedly installed inside the valve body (1). The valve core valve stem assembly (3) is movably installed inside the valve stem guide sleeve (4) and the valve cavity guide sleeve (5). A diffuser section (6) is provided on the left side of the valve seat (2). The curvature of the side pipe inlet of the valve body (1) is R150. The valve seat (2) is inlaid with tungsten carbide, and the right end of the valve seat (2) is a conical sealing surface with an angle of 150°. The valve core and valve stem assembly (3) includes a valve core head (3a), a valve core seat (3b), a valve stem (3c), a connecting bolt (3d), and a cylindrical pin (3e). The valve stem (3c) is movably installed inside the valve stem guide sleeve (4). The left side of the valve stem (3c) is threadedly connected to the valve core seat (3b) and then fully welded. The left side of the valve core seat (3b) and the valve core head (3a) are threadedly connected by the connecting bolt (3d). The cylindrical pin (3e) penetrates into the interior of the connecting bolt (3d) and the valve core seat (3b) and is then welded. The sealing surface angle of the valve core head (3a) is 120°.

2. The novel black water angle valve according to claim 1, characterized in that: A packing gasket (8) is fixedly disposed between the inside of the valve cover (7) and the valve core and valve stem assembly (3). The right side of the packing gasket (8) is filled with packing (9), and the left side of the packing gasket (8) is fixedly installed with a valve stem guide sleeve (4). An annular scraper is disposed inside the valve stem guide sleeve (4), and the valve stem guide sleeve (4) is located on the outer wall of the valve stem (3c).

3. The novel black water angle valve according to claim 1, characterized in that: The valve cavity guide sleeve (5) is located on the outer wall of the valve core seat (3b), and the valve cavity guide sleeve (5) is provided with three layers of scrapers inside.

4. A novel black water angle valve according to claim 3, characterized in that: A first scraper (10) is fixedly installed on the right side inside the valve cavity guide sleeve (5), a third scraper (12) is fixedly installed on the left side inside the valve cavity guide sleeve (5), and a second scraper (11) is fixedly installed between the first scraper (10) and the third scraper (12).

5. A novel black water angle valve according to claim 4, characterized in that: The first scraper (10) is an annular flange, the second scraper (11) and the third scraper (12) are spaced flanges, and the flange height of the second scraper (11) and the third scraper (12) is slightly lower than that of the first scraper (10).

6. A novel black water angle valve according to claim 5, characterized in that: The gap between the flange of the first scraper (10) and the valve core seat (3b) is very small, which plays the role of scraping off the adhering material. The flanges of the second scraper (11) and the third scraper (12) are arranged alternately to ensure that no dead corners are left.

7. A novel black water angle valve according to claim 1, characterized in that: The valve seat (2) and the diffuser section (6) are detachably installed. The diffuser section (6) is embedded with tungsten carbide, and the angle inside the diffuser section (6) is 6°.

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