A special ball valve for high temperature powder slag

Abstract

The present invention discloses a ball valve for high-temperature powder slag, comprising a valve body, a ball, a valve seat retaining ring and a valve body cooling assembly. The present invention has a novel and reasonable structure, and by arranging a valve body interlayer for cooling medium circulation on the side wall of the valve body, and dividing it into a first water chamber and a second water chamber according to the ball installation position and the valve seat installation position, the cooling requirements of the ball working area and the valve seat installation area can be met at the same time, which not only solves the problem of valve body failure caused by high temperature, increases the safety guarantee and service life of the valve, but also solves the problem of failure of the preload force of the spring under ultra-high temperature state under high temperature, which leads to failure of the valve seal and affects the normal use of the valve, and has strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to a ball valve special for high-temperature powder slag. Background Art

[0002] As a component used to realize the on-off and flow control of pipeline systems, high-temperature ball valves have been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc. With the development of valve technology, the functional requirements for powder-slag special ball valves used in harsh media conditions containing particles and impurities are becoming higher and higher in industry. Not only are valves required to meet zero leakage standards, but they also need to be able to work at high temperatures (350°~700°) for a long time. Occasionally, the temperature will rise to about 1000°C when it is unstable. This is a great test for the material and structure of the valve. It is easy for the ball to expand excessively due to high temperature, causing the ball and the valve seat to expand and get stuck, or the valve stem to expand and elongate, causing the valve stem and the ball to expand and get stuck, resulting in valve failure and affecting the service life of the valve. In addition, the seals of existing high-temperature ball valves are mostly installed by spring pre-tightening. Under ultra-high temperature conditions (such as around 1000°C), spring failure is prone to occur, resulting in valve seal failure, affecting the normal use of the valve.

[0003] Therefore, it is particularly important to propose a new type of high-temperature powder slag special ball valve so that it can adapt to a variety of high-temperature working environments and avoid valve failures caused by high temperature and affect the service life of the valve. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of high-temperature powder slag special ball valve, which can adapt to a variety of high-temperature working environments, avoid valve failure due to high temperature and affect the service life of the valve, thereby solving the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a ball valve specially designed for high-temperature powder slag, comprising:

[0007] A valve body, wherein a valve seat is provided at a feed end of the valve body;

[0008] A sphere, the sphere being disposed in the valve body and connected to a valve stem;

[0009] A valve seat retaining ring, the valve seat retaining ring is arranged in the valve seat, the outer ring of the outlet end of the valve seat retaining ring is provided with a metal sealing ring, and the metal sealing ring is pre-tightened and installed on the valve seat by a high-temperature spring; the metal sealing ring can contact the spherical surface of the ball and form a sealing surface between the sealing ring and the ball;

[0010] A valve body cooling assembly, the valve body cooling assembly comprising a valve body interlayer for circulating a cooling medium, the valve body interlayer being arranged on the side wall of the valve body; an annular dividing chamber partition being arranged in the valve body interlayer to separate the valve body interlayer into a first water chamber and a second water chamber isolated from each other in the axial direction of the valve body, wherein the first water chamber is covered on the outer periphery of the valve seat, and the second water chamber is covered on the outer periphery of the sphere; a water inlet pipe and a water outlet pipe are arranged on both the first water chamber and the second water chamber. On the first water chamber, the water inlet pipe is arranged on the outer wall of the valve body and communicated with the first water chamber to introduce a cooling medium into the first water chamber; the water outlet pipe is arranged on the outer wall of the valve body and communicated with the first water chamber to discharge the cooling medium in the first water chamber. Correspondingly, on the second water chamber, the water inlet pipe is arranged on the outer wall of the valve body and communicated with the second water chamber to introduce a cooling medium into the second water chamber; the water outlet pipe is arranged on the outer wall of the valve body and communicated with the second water chamber to discharge the cooling medium in the second water chamber.

[0011] Optionally, the valve body interlayer is an annular interlayer; correspondingly, the first water cavity and the second water cavity are both annular cavities.

[0012] Optionally, the first water chamber is provided with:

[0013] a directional circulation baffle, the directional circulation baffle being arranged along the axial direction of the valve body and being located between the water inlet pipe and the water outlet pipe on the first water chamber;

[0014] The supporting ribs are arranged along the axial direction of the valve body, and a plurality of the supporting ribs are arranged at intervals in the first water cavity; and a water hole is provided on any of the supporting ribs.

[0015] Optionally, the second water chamber is provided with:

[0016] a directional circulation baffle, the directional circulation baffle being arranged along the axial direction of the valve body and being located between the water inlet pipe and the water outlet pipe on the first water chamber;

[0017] The supporting ribs are arranged along the axial direction of the valve body, and a plurality of the supporting ribs are arranged at intervals in the first water cavity; and a water hole is provided on any of the supporting ribs.

[0018] Optionally, a set of water inlet pipes, water outlet pipes, supporting ribs and directional circulation baffles are respectively configured in the first water chamber and the second water chamber.

[0019] Optionally, a sphere cooling assembly is also included, which includes:

[0020] A sphere interlayer, which is arranged on the side wall of the sphere and is used for cooling medium circulation;

[0021] A sphere interlayer water inlet pipe, which is arranged on the outer wall of the sphere and communicated with the sphere interlayer to introduce cooling medium;

[0022] The sphere interlayer water outlet pipe is arranged on the outer wall of the sphere and communicated with the sphere interlayer to discharge the cooling medium.

[0023] Optionally, the sphere interlayer water inlet pipe and the sphere interlayer water outlet pipe of the sphere cooling assembly can be integrated in a transmission shaft (i.e., the valve stem) connected to the sphere, and a water inlet and a water outlet are further arranged on the transmission shaft (i.e., the valve stem) to be connected to the sphere interlayer water inlet pipe and the sphere interlayer water outlet pipe respectively. The setting of the sphere cooling assembly does not affect the switching of the open and closed states of the sphere.

[0024] Optionally, the high-temperature powder-slag dedicated ball valve further includes:

[0025] A particle blocking ring, the particle blocking ring is installed on the inner ring of the valve seat retaining ring, the inner wall of the particle blocking ring is provided with a screening bar, the projection area of ​​the screening bar on the cross section of the particle blocking ring is not greater than 1 / 3 of the cross section area of ​​the particle blocking ring, the screening bar is located in the front part of the valve body opening before the ball is completely closed, and can intercept part of the particles from entering the valve body before the ball is completely closed;

[0026] A metal scraper ring, which is arranged on the outer ring of the outlet end of the valve seat retaining ring, and is located on the inner ring of the metal sealing ring. The metal scraper ring can contact the spherical surface of the ball and form a sealing surface between the scraper ring and the ball, so as to intercept the particles entering the valve body through the screening fence before the ball is completely closed;

[0027] Secondary screening position, the secondary screening position is located in the inner ring of the metal scraper ring, and there is a secondary screening gap between the secondary screening position and the spherical surface of the ball, the secondary screening gap can intercept part of the particles that enter the valve body through the screening bar before the ball is completely closed. On this basis, the screening bar serves as the primary screening position, and the metal scraper ring serves as the tertiary cleaning position. The primary screening position, the secondary screening position and the tertiary cleaning position work together to screen and intercept particles layer by layer, so as to prevent particles from entering the valve body and damaging the sealing surface before the valve is completely closed;

[0028] Among them, the screening bar is located at the front of the valve body opening before the ball is completely closed, specifically refers to the screening bar being arranged near the rotation terminal when the ball is closed. When the ball is about to be closed, most of the inlet on the valve body has been basically blocked by the spherical surface of the ball, and the unblocked part is the part that the ball has not yet rotated during its closing process. When the ball is completely closed, that is, the ball reaches the rotation terminal when the ball is closed, and the screening bar is arranged in front of the rotation terminal, before the ball is completely closed, the ball has not reached the rotation terminal, and there is still a gap between the ball and the valve body. The gap and the spherical surface of the ball occupy the cross-section of the water inlet end of the entire valve body, and the part occupied by the spherical surface of the ball, the scraper ring and the ball sealing surface have been formed, and the part not occupied by the spherical surface of the ball, that is, the gap, is still likely to have large particles of impurities entering. The screening bar can be arranged in front of the gap without covering the entire cross-section of the water inlet end of the valve body. Based on the guarantee of the valve body flow, the screening bar should not cover the entire cross-section of the water inlet end of the valve body. Of course, under other specific demand conditions, the coverage area of ​​the filter bar at the cross section of the water inlet end of the valve body can also be expanded, or even completely cover the cross section of the water inlet end of the valve body.

[0029] Optionally, the secondary screening position is arranged at one end of the particle blocking ring close to the sphere and is integrally formed with the particle blocking ring.

[0030] Optionally, a retaining ring groove is provided in the inner ring of the secondary screening position and / or the metal scraper ring, and the retaining ring groove is used to accommodate intercepted particulate matter.

[0031] Optionally, the secondary screening position and the inner ring of the metal scraper ring are both provided with a retaining ring groove, the retaining ring groove of the inner ring of the secondary screening position serves as a secondary retaining ring groove, and the retaining ring groove of the inner ring of the metal scraper ring serves as a tertiary retaining ring groove, and sufficient accommodating space is formed between the secondary retaining ring groove and the tertiary retaining ring groove and the spherical surface of the sphere.

[0032] Optionally, the secondary screening position, the metal scraper ring and the metal sealing ring are all pre-tightened and installed on the valve seat using high-temperature springs.

[0033] Optionally, the metal sealing ring is a hard alloy sealing ring, and a filler and a filler top block are arranged between the metal sealing ring and the valve seat. The filler can be a graphite ring, and the filler top block can be a gasket structure.

[0034] Optionally, the top of the valve stem (i.e. the transmission shaft) is connected to an actuator, and a transmission shaft bracket can be configured outside the valve stem (i.e. the transmission shaft). The actuator is an electric or manual actuator; and the transmission shaft bracket is fixed to the top of the valve body.

[0035] Optionally, the top of the sphere is connected to the valve stem (ie the transmission shaft mentioned above), and the bottom is connected to a positioning shaft, thereby forming a fixed ball valve structure. The end of the positioning shaft can be provided with a shaft rear cover.

[0036] Optionally, the screening bar includes a plurality of screening channels distributed along the medium flow direction, and the width of any of the screening channels increases sequentially along the medium flow direction; and the outer surface of the screening bar is sprayed with a carbide coating.

[0037] Optionally, any cross-section of any of the screening channels is rectangular.

[0038] Optionally, the state before the complete closure is the valve state when the ball is closed to rotate α degrees, wherein 0<α≤22.

[0039] Compared with the prior art, the present invention has achieved the following technical effects:

[0040] The high-temperature powder slag special ball valve proposed in the present invention has a novel and reasonable structure. By arranging a valve body interlayer for cooling medium circulation on the side wall of the valve body, and dividing it into a first water chamber and a second water chamber according to the ball installation position and the valve seat installation position, the cooling requirements of the ball working area and the valve seat installation area can be met at the same time. It not only solves the problem of valve body failure caused by high temperature, increases the safety and service life of the valve, but also solves the problem of failure of the preload force of the spring under ultra-high temperature state, which leads to failure of the valve seal and affects the normal use of the valve. It has strong practicality.

[0041] In another technical solution disclosed in the present invention, a screening bar is set to screen out larger particles before the ball is completely closed, thereby preventing larger particles from entering the valve body and causing the valve body to be stuck and unable to close; at the same time, a metal scraper ring is set and a sealing surface between the scraper ring and the ball is formed between the metal scraper ring and the ball, thereby preventing particles that enter the valve body through the screening bar from continuing to enter and damaging the metal sealing ring. The present invention achieves the effect of effectively preventing foreign particles from entering the valve body when the ball valve is closed through the setting of the screening bar and the metal scraper ring, which is beneficial to improving the sealing performance and service life of the valve body. Among them, the projection area of ​​the screening bar on the cross section of the particle blocking ring only occupies a small part of the entire cross-sectional area of ​​the particle blocking ring, which can achieve the effect of screening out large particles while ensuring the flow of the ball valve. In order to further improve the particle screening effect, the present invention also sets a secondary screening position, and there is a secondary screening gap between the secondary screening position and the spherical surface of the ball, which can intercept a part of the particles that enter the valve body through the screening bar from continuing to enter before the ball is completely closed. On this basis, the screening fence, secondary screening position and metal scraper ring work together as the primary screening position, secondary screening position and tertiary cleaning position respectively, screening and intercepting particles layer by layer, so as to prevent particles from entering the valve body and damaging the sealing surface before the valve is completely closed. The structural design is ingenious and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 This is a schematic diagram of the overall structure of a ball valve dedicated to high-temperature powder slag disclosed in an embodiment of the present invention;

[0044] Figure 2 A cross-sectional view of a high-temperature powder slag special ball valve disclosed in an embodiment of the present invention Figure 1 ;

[0045] Figure 3 A cross-sectional view of a high-temperature powder slag special ball valve disclosed in an embodiment of the present invention Figure 2 ;

[0046] Figure 4 This is a schematic diagram of the valve state when the ball of the high-temperature powder slag special ball valve disclosed in the embodiment of the present invention is closed and rotated 22 degrees;

[0047] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0048] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0049] Figure 7 It is a schematic structural diagram of a particle blocking ring in a ball valve dedicated for high-temperature powder slag disclosed in an embodiment of the present invention;

[0050] Figure 8 It is a front view of a particle blocking ring in a ball valve for high-temperature powder slag disclosed in an embodiment of the present invention;

[0051] Fig. 9 It is an axial cross-sectional view of a particle blocking ring in a ball valve specially used for high-temperature powder slag disclosed in an embodiment of the present invention;

[0052] Fig.10 This is a schematic diagram of the installation of a particle blocking ring in a high-temperature powder slag special ball valve disclosed in an embodiment of the present invention;

[0053] Fig.11 It is a schematic structural diagram of the first water chamber in the high-temperature powder slag special ball valve disclosed in an embodiment of the present invention;

[0054] Fig.12 It is a schematic structural diagram of the second water chamber in the high-temperature powder slag special ball valve disclosed in an embodiment of the present invention.

[0055] Among them, the accompanying drawings are marked as follows: 100, special ball valve for high-temperature powder slag; 1, valve body; 2, ball; 3, valve seat retaining ring; 4, particle blocking ring; 5, metal scraping ring; 6, secondary screening position; 7, valve seat; 8, metal sealing ring; 9, sealing surface position of sealing ring and ball; 10, screening bar; 11, screening channel; 12, sealing surface position of scraping ring and ball; 13, secondary screening gap; 14, secondary retaining ring groove; 15, tertiary retaining ring groove; 16, packing; 17, packing top block; 18, metal sealing ring pre-tightening spring hole with high-temperature spring; 19, second retaining ring pre-tightening spring hole with high-temperature spring ; 20. The third retaining ring preload spring hole is equipped with a high-temperature spring; 21. Intercepted particles; 22. Water inlet pipe; 23. Water outlet pipe; 24. Directional circulation baffle; 25. Support ribs; 26. Water through hole; 27. Dividing chamber baffle; 28. First water chamber; 29. ​​Second water chamber; 30. Transmission shaft; 31. Transmission shaft bracket; 32. Packing gland; 33. Packing bin; 34. Thrust pad; 35. High-temperature resistant transmission shaft sleeve; 36. Valve seat and valve body sealing position; 37. Connecting flange; 38. Positioning shaft; 39. Positioning shaft bracket; 40 Positioning shaft bracket, positioning shaft sleeve; 41. Shaft back cover. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] One of the purposes of the present invention is to provide a new type of high-temperature powder slag special ball valve, which can adapt to a variety of high-temperature working environments, avoid valve failure due to high temperature and affect the service life of the valve, thereby solving the problems existing in the prior art.

[0058] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] Embodiment 1

[0060] like Figure 1-12 As shown, this embodiment provides a ball valve 100 for high-temperature powder slag, which mainly includes a valve body 1, a ball 2, a particle blocking ring 4, a metal scraper ring 5 and a secondary screening position 6. The ball 2 is arranged in the valve body 1, and a valve seat 7 is arranged at the feed end of the valve body 1. A valve seat retaining ring 3 is arranged between the ball 2 and the valve seat 7. A metal sealing ring 8 is arranged on the outer ring of the outlet end (i.e., the rear part in the medium flow direction) of the valve seat retaining ring 3. The metal sealing ring 8 can contact with the spherical surface of the ball 2 and form a sealing surface position 9 between the sealing ring and the ball; the particle blocking ring 4 is installed on the inner ring of the valve seat retaining ring 3, and a screening bar 10 is arranged on the inner wall of the particle blocking ring 4. The projection area of ​​the screening bar 10 on the cross section of the particle blocking ring 4 is not more than 1 / 3 of the cross-sectional area of ​​the particle blocking ring 4. The fence 10 is located at the front part of the opening of the valve body 1 before the ball 2 is completely closed (i.e., the front part in the flow direction of the medium, and the medium must enter the valve body through this "front part" before the ball 2 is completely closed), which can intercept some particles from entering the valve body 1 before the ball 2 is completely closed; the metal scraper ring 5 is arranged on the outer ring of the outlet end of the valve seat retaining ring 3, and the metal scraper ring 5 is located on the inner ring of the metal sealing ring 8, and the metal scraper ring 5 can contact the spherical surface of the ball 2 and form a scraper ring and ball sealing surface position 12, so as to intercept the particles that enter the valve body 1 through the screening fence 10 from continuing to enter before the ball 2 is completely closed. Among them, the scraper ring and the ball sealing surface 12 always exist during the rotation of the ball 2. The scraper ring and the ball sealing surface 12 can intercept the particles that enter the valve body 1 through the screening fence 10 when the ball 2 is in the open state, semi-open state and closed state, thereby preventing impurities from entering between the ball 2 and the metal sealing ring 8, and squeezing the impurities at the moment the ball 2 is closed, thereby causing damage to the ball 2 or the metal sealing ring 8.

[0061] In this embodiment, Figures 2 to 6 As shown, the filter bar 10 is located at the front of the opening of the valve body 1 before the ball 2 is completely closed, specifically, the filter bar 10 is arranged close to the rotation terminal when the ball 2 is closed. When the ball 2 is about to be closed, most of the inlet on the valve body 1 has been basically blocked by the spherical surface of the ball 2, and the unblocked part is the part that the ball 2 has not yet rotated during its closing process. When the ball 2 is completely closed, that is, the ball 2 reaches the rotation terminal when the ball 2 is closed, and the filter bar 10 is arranged in front of the rotation terminal, before the ball 2 is completely closed, the ball 2 has not yet reached the rotation terminal. When the ball 2 reaches the end of rotation, there is still a gap between the ball 2 and the valve body 1. The gap and the spherical surface of the ball 2 occupy the entire cross-section of the water inlet end of the valve body 1. The part occupied by the spherical surface of the ball 2 has been formed by the scraper ring and the ball sealing surface 12. The part not occupied by the spherical surface of the ball 2, that is, the gap, is still likely to have large particles of impurities entering. The screening bar 10 can be set in the front part of the gap, and it is not necessary to cover the entire cross-section of the water inlet end of the valve body 1. Based on the guarantee of the flow of the valve body 1, the screening bar 10 should not cover the entire cross-section of the water inlet end of the valve body 1. Of course, in other specific demand situations, the coverage area of ​​the screening bar 10 in the cross-section of the water inlet end of the valve body 1 can also be expanded, or even completely cover the cross-section of the water inlet end of the valve body 1.

[0062] In this embodiment, Figures 2 to 6 As shown, it also includes a secondary screening position 6, which is located in the inner ring of the metal scraping ring 5, and there is a secondary screening gap 13 between the secondary screening position 6 and the spherical surface of the ball 2. The secondary screening gap 13 can intercept part of the particles that enter the valve body 1 through the screening bar 10 before the ball 2 is completely closed. On this basis, the screening bar 10 serves as a primary screening position, and the metal scraping ring 5 serves as a tertiary cleaning position. The primary screening position, the secondary screening position 6 and the tertiary cleaning position work together to screen and intercept particles layer by layer, so as to prevent particles from entering the valve body 1 and damaging the sealing surface before the valve is completely closed. In this embodiment, the first-level screening position can be preferred, that is, the screening bar 10 can intercept large particle impurities with a particle size of more than 6 mm, and the particle impurities passing through the screening bar 10 are all below 6 mm in size; among the particle impurities passing through the screening bar 10, the particle impurities with a particle size greater than 3 mm cannot pass through the second-level screening gap 13, thereby achieving the effect of secondary interception by the second-level screening position 6; and the remaining particle impurities entering through the second-level screening gap 13 can be intercepted again under the action of the third-level cleaning position, that is, the scraping ring and the ball sealing surface position 12, to prevent them from entering between the ball valve 2 and the metal sealing ring 8.

[0063] In this embodiment, Figures 2-3 As shown, the secondary screening position 6 is arranged at one end of the particle blocking ring 4 close to the sphere 2 and is integrally formed with the particle blocking ring 4 .

[0064] In this embodiment, Figures 2 to 6As shown, the inner rings of the secondary screening position 6 and the metal scraper ring 5 are both provided with retaining ring grooves, the retaining ring grooves of the inner ring of the secondary screening position 6 serve as secondary retaining ring grooves 14, and the retaining ring grooves of the inner ring of the metal scraper ring 5 serve as tertiary retaining ring grooves 15, and sufficient accommodating space is formed between the secondary retaining ring grooves 14 and the tertiary retaining ring grooves 15 and the spherical surface of the sphere 2 for accommodating particulate impurities intercepted by the two respectively.

[0065] In this embodiment, the valve body 1 is preferably made of existing wear-resistant materials, and the ball 2 is preferably a high-temperature resistant ball made of high-temperature resistant materials.

[0066] In this embodiment, Figure 1 As shown, the secondary screening position 6, the metal scraper ring 5 and the metal sealing ring 8 are all pre-tightened and installed on the valve seat 7 with a high-temperature spring. The specific setting methods are as follows: Figure 2 As shown in the figure, the second retaining ring pre-tightening spring hole is equipped with a high-temperature spring 19, the third retaining ring pre-tightening spring hole is equipped with a high-temperature spring 20, and the metal sealing ring pre-tightening spring hole is equipped with a high-temperature spring 18.

[0067] In this embodiment, the metal sealing ring 8 is a hard alloy sealing ring, and a packing 16 and a packing top block 17 are arranged between the metal sealing ring 8 and the valve seat 7. The packing 16 can be a graphite ring, and the packing top block 17 can be a gasket structure.

[0068] In this embodiment, the high-temperature powder slag special ball valve 100 also includes a valve body cooling assembly, which includes a valve body interlayer, an inlet pipe 22 and an outlet pipe 23. The valve body interlayer is arranged on the side wall of the valve body 1 for circulating the cooling medium; the inlet pipe 22 is arranged on the outer wall of the valve body 1 and is connected to the valve body interlayer to introduce the cooling medium; the outlet pipe 23 is arranged on the outer wall of the valve body 1 and is connected to the valve body interlayer to discharge the cooling medium; a directional circulation baffle 24 is arranged in the valve body interlayer and is located between the inlet pipe 22 and the outlet pipe 23.

[0069] In this embodiment, the valve body cooling assembly further includes a supporting rib 25, which is arranged in the valve body interlayer; a water hole 26 is provided on the supporting rib 25. Among them, a plurality of supporting ribs 25 are arranged at intervals, and the valve body interlayer is an annular interlayer; the directional circulation baffle 24 and the supporting rib 25 are both arranged along the axial direction of the valve body 1 in the annular interlayer.

[0070] In this embodiment, Figure 2 , 11As shown in Figures 1 and 12, a dividing partition plate 27 is provided in the valve body interlayer. The dividing partition plate 27 is an annular partition plate, which is used to separate the valve body interlayer into two mutually isolated cavities in the axial direction of the valve body 1. The two cavities correspond to the mounting part of the ball 2 and the mounting part of the valve seat 7 respectively. The two cavities are the first water cavity 28 and the second water cavity 29, respectively. A set of water inlet pipe 22, water outlet pipe 23, support rib plate 25 and directional circulation partition plate 24 are respectively arranged on the first water cavity 28 and the second water cavity 29.

[0071] In this embodiment, the ball valve for high-temperature powder slag further includes a ball cooling assembly, which includes a ball interlayer, which is arranged on the side wall of the ball 2 for circulating the cooling medium; the ball interlayer is provided with a water inlet pipe and a water outlet pipe connected to the ball interlayer. The water inlet pipe and the water outlet pipe of the ball cooling assembly can be integrated in the transmission shaft 30 (i.e., the valve stem) connected to the ball 2, and the transmission shaft 30 (i.e., the valve stem) is further provided with a water inlet and a water outlet, which are respectively connected to the above-mentioned water inlet pipe 22 and the above-mentioned water outlet pipe 23. The setting of the ball cooling assembly does not affect the switching of the open and closed state of the ball 2.

[0072] In this embodiment, Figure 2 As shown, the top of the ball 2 is connected to the transmission shaft 30 (i.e., the valve stem), the top of the transmission shaft 30 (i.e., the valve stem) can be connected to the actuator, and the bottom of the ball 2 is connected to the positioning shaft 38, thereby forming a fixed ball valve structure. Figures 2-3 As shown, the transmission shaft 30 (i.e., the valve stem) can be configured with a transmission shaft bracket 31, a stuffing gland 32, a stuffing bin 33, a thrust pad 34, a high-temperature resistant transmission shaft sleeve 35, etc. according to the conventional structural setting method of the valve, and the positioning shaft 38 can be configured with a shaft rear cover 41, a positioning sleeve 40, a positioning shaft bracket 39, etc. according to the conventional structural setting method of the valve.

[0073] In this embodiment, Figures 2-3 As shown, both ends of the valve body 1 are provided with connection flanges 37 for connecting with pipelines. A valve seat and valve body sealing position 36 of a three-level sealing structure is formed between the valve seat 7 and the valve body 1.

[0074] In this embodiment, Figures 7-10 As shown, the screening bar 10 includes a plurality of screening channels 11 distributed along the medium flow direction, and the width of any screening channel 11 increases sequentially along the medium flow direction; the outer surface of the screening bar 10 is sprayed with a carbide coating.

[0075] In this embodiment, Figures 7-10 As shown, any cross section of any screening channel 11 is rectangular.

[0076] In this embodiment, before fully closed specifically refers to the valve state when the ball 2 is closed to rotate α degrees, where 0<α≤22. Figure 4As shown, it is a schematic diagram of the valve state when the ball 2 is closed and rotated 22 degrees.

[0077] It can be seen that the high-temperature powder slag special ball valve proposed in this embodiment has a novel and reasonable structure. By setting a valve body interlayer for cooling medium circulation on the side wall of the valve body, and dividing it into a first water chamber and a second water chamber according to the ball installation position and the valve seat installation position, it can simultaneously meet the cooling requirements of the ball working area and the valve seat installation area, which not only solves the problem of valve body failure caused by high temperature, increases the safety and service life of the valve, but also solves the problem of failure of the preload force of the spring under ultra-high temperature state, which leads to failure of the valve seal and affects the normal use of the valve. At the same time, this embodiment also provides a ball cooling assembly, which can further cool the valve, which is conducive to improving the overall high temperature adaptability and service life of the valve.

[0078] Under harsh working conditions, there are many particles and impurities in the medium. During the closing process of the existing ball valve or at the moment of closing, a large number of particle impurities will still enter the valve body from the opening gap. During this period, the impurities cause further erosion and scratching of the sealing surface (generally the sealing ring between the valve seat retaining ring and the ball), which directly affects the sealing performance. At the same time, impurity particles with smaller particle sizes may enter the valve body when the ball valve is closed and be crushed by the ball and the valve body, but this will also cause damage to the sealing surface; and impurity particles with larger particle sizes (for example, particle sizes above 60mm) are likely to be stuck between the ball and the valve body of the ball valve, making the ball valve unable to continue to close, thereby causing damage to the ball valve and reducing the service life of the ball valve. The ball valve for high-temperature powder slag proposed in this embodiment has a novel and reasonable structure. By setting a screening bar to screen out larger particles before the ball is completely closed, it can prevent larger particles from entering the valve body and causing the valve body to be stuck and unable to close; at the same time, by setting a metal scraper ring and forming a sealing surface between the scraper ring and the spherical surface of the ball, it can prevent particles that have entered the valve body through the screening bar from continuing to enter and damaging the metal sealing ring. The present invention achieves the effect of effectively preventing foreign particles from entering the valve body when the ball valve is closed by setting the above-mentioned screening bar and metal scraper ring, which is beneficial to improving the sealing performance and service life of the valve body. Among them, the projection area of ​​the screening bar on the cross section of the particle blocking ring only occupies a small part of the entire cross-sectional area of ​​the particle blocking ring, which can achieve the effect of screening out large particles while ensuring the flow of the ball valve.

[0079] In addition, in order to further improve the particle screening effect, the present embodiment is provided with a secondary screening position, and there is a secondary screening gap between the secondary screening position and the spherical surface of the ball, which can intercept a part of the particles that enter the valve body through the screening bar before the ball is completely closed. On this basis, the screening bar, the secondary screening position and the metal scraping ring work together as the primary screening position, the secondary screening position and the tertiary cleaning position, respectively, screening and intercepting particles layer by layer, so as to prevent particles from entering the valve body and damaging the sealing surface before the valve is completely closed. The structural design is ingenious and the use effect is good.

[0080] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0081] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A ball valve for high temperature powder slag, characterized in that: include: A valve body, wherein a valve seat is provided at a feed end of the valve body; A sphere, the sphere being disposed in the valve body and connected to a valve stem; A valve seat retaining ring, the valve seat retaining ring is arranged in the valve seat, the outer ring of the outlet end of the valve seat retaining ring is provided with a metal sealing ring, and the metal sealing ring is pre-tightened and installed on the valve seat by a high-temperature spring; the metal sealing ring can contact the spherical surface of the ball and form a sealing surface between the sealing ring and the ball; A valve body cooling assembly, the valve body cooling assembly comprising a valve body interlayer for circulating a cooling medium, the valve body interlayer being arranged on the side wall of the valve body; an annular dividing chamber partition is arranged in the valve body interlayer to separate the valve body interlayer into a first water chamber and a second water chamber isolated from each other in the axial direction of the valve body, wherein the first water chamber is coated on the outer periphery of the valve seat, and the second water chamber is coated on the outer periphery of the sphere; a water inlet pipe and a water outlet pipe are arranged on the first water chamber and the second water chamber; A particle blocking ring, the particle blocking ring is installed on the inner ring of the valve seat retaining ring, the inner wall of the particle blocking ring is provided with a screening bar, the projection area of ​​the screening bar on the cross section of the particle blocking ring is not greater than 1 / 3 of the cross section area of ​​the particle blocking ring; the screening bar is located at the front of the valve body opening before the ball is completely closed, and can intercept part of the particles from entering the valve body before the ball is completely closed; A metal scraper ring, which is arranged on the outer ring of the outlet end of the valve seat retaining ring, and is located on the inner ring of the metal sealing ring. The metal scraper ring can contact the spherical surface of the ball and form a sealing surface between the scraper ring and the ball, so as to intercept the particles entering the valve body through the screening fence before the ball is completely closed; A secondary screening position, the secondary screening position is located at the inner ring of the metal scraper ring, and there is a secondary screening gap between the secondary screening position and the spherical surface of the ball, and the secondary screening gap can intercept part of the particles entering the valve body through the screening fence before the ball is completely closed; The state before fully closing is the valve state when the ball is closed to rotate α degrees, wherein 0<α≤22.

2. The high temperature powder slag special ball valve according to claim 1 is characterized in that: The first water chamber is provided with: a directional circulation baffle, the directional circulation baffle being arranged along the axial direction of the valve body and being located between the water inlet pipe and the water outlet pipe on the first water chamber; The supporting ribs are arranged along the axial direction of the valve body, and a plurality of the supporting ribs are arranged at intervals in the first water cavity; and a water hole is provided on any of the supporting ribs.

3. The high temperature powder slag special ball valve according to claim 1 is characterized in that: The second water chamber is provided with: a directional circulation baffle, the directional circulation baffle being arranged along the axial direction of the valve body and being located between the water inlet pipe and the water outlet pipe on the second water chamber; The supporting ribs are arranged along the axial direction of the valve body, and a plurality of the supporting ribs are arranged at intervals in the second water cavity; and a water hole is provided on any of the supporting ribs.

4. The high temperature powder slag special ball valve according to any one of claims 1 to 3, characterized in that: Also included is a sphere cooling assembly comprising: A sphere interlayer, which is arranged on the side wall of the sphere and is used for cooling medium circulation; A sphere interlayer water inlet pipe, which is arranged on the outer wall of the sphere and communicated with the sphere interlayer to introduce cooling medium; The sphere interlayer water outlet pipe is arranged on the outer wall of the sphere and communicated with the sphere interlayer to discharge the cooling medium.

5. The high temperature powder slag special ball valve according to claim 1, characterized in that: The secondary screening position is arranged at one end of the particle blocking ring close to the sphere and is integrally formed with the particle blocking ring.

6. The high temperature powder slag special ball valve according to claim 1, characterized in that: The inner ring of the secondary screening position and / or the metal scraper ring is provided with a retaining ring groove, and the retaining ring groove is used to accommodate intercepted particles; the secondary screening position and the metal scraper ring are both pre-tightened and installed on the valve seat with a high-temperature spring.

7. The high temperature powder slag special ball valve according to claim 1, characterized in that: The screening bar comprises a plurality of screening channels distributed along the medium flow direction, and the width of any of the screening channels increases sequentially along the medium flow direction; the outer surface of the screening bar is sprayed with a carbide coating.

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