Slurry valve with high sealing durability

Abstract

The invention relates to the field of slurry valves, in particular to a slurry valve with high sealing durability, which comprises an upper valve body, a lower valve body, a valve clack, a sealing ring, an upper ring plate and a lower ring plate, and first convex teeth are convexly constructed at opposite positions of a first pressure reducing ring part and a second pressure reducing ring part; second convex teeth are formed in the opposite positions of the upper annular plate and the lower annular plate in a protruding mode, gaps between the tooth groove bottoms of the first convex teeth and the tooth tops of the second convex teeth and gaps between the tooth tops of the first convex teeth and the tooth groove bottoms of the second convex teeth are set as second pressure reducing holes, and the inner diameter of the upper annular plate and the inner diameter of the lower annular plate are connected through a sealing elastic piece. The sealing elastic piece is used for forcing the upper ring plate and the lower ring plate to vertically separate and move; the space defined by the groove wall of the expansion groove and the inner wall of the sealing elastic piece is set as a first pressure reduction space, and the space defined by the sealing elastic piece, the sealing ring, the first connecting ring part and the second pressure reduction ring part is set as a second pressure reduction space. Erosive wear of the sealing surface can be reduced, so that the sealing durability is improved.

Description

Technical Field

[0001] The present application relates to the field of slurry valves, and in particular to a slurry valve with high sealing durability. Background Art

[0002] Currently, the pipeline control valves used in high-pressure slurry delivery systems primarily utilize Y-type slurry valves. During use, Y-type slurry valves are subject to significant erosion when the valve seat serves as the flow surface, as the conveying medium contains a large amount of suspended solid particles, some of which are corrosive. This can lead to seal failure and significantly shorten the service life of the Y-type slurry valve, as the valve seat's sealing surface becomes the flow surface when the valve is opened.

[0003] Chinese patent application number 2020114968827 discloses a mud regulating valve core assembly, which includes a valve core, a valve seat, a sleeve and a valve plug. A sleeve is provided with a sleeve hole, the cross-sectional shape of the sleeve hole is circular, and a plurality of throttling holes are provided in the circumferential direction of the middle part of the sleeve. A valve hole is provided in the valve seat, and the valve hole is an annular structure with a larger top and a smaller bottom. The valve holes are composed of a conical sealing hole section and a cylindrical flow blocking hole section from top to bottom; the valve core and the inner surface of the sealing part of the valve seat are sealed.

[0004] When the valve core and valve seat are in sealing engagement, the valve plug is inserted into the flow-blocking portion, the valve core is positioned in the sleeve hole, and the center of the valve core is located in the center of the sleeve. An annular first expansion and pressure-reducing space is formed between the lower portion of the valve core and the lower portion of the sleeve, and an annular second expansion and pressure-reducing space is formed between the valve core, valve seat, and valve plug. This valve core assembly protects the valve seal in any operating state, whether open, closed, or regulating, ensuring the integrity of the sealing surface.

[0005] At the initial stage of valve opening, the main seal opens first, and the sealing end face of the valve core is 3-5mm away from the sealing surface of the valve seat. At this time, the valve plug opens, and the valve core and the throttle hole of the sleeve move synchronously. Only a small amount of leakage medium passes through the valve plug. The sealing surface of the valve seat has a large area, so the flow rate can be ignored and the sealing surface is not eroded.

[0006] When the valve is closed, the valve plug blocks the flow first, and the throttle hole is blocked by the synchronous movement of the valve core. At this time, there is basically no flow passing through the sealing surface, and the sealing surface is not eroded.

[0007] From the above, it can be seen that the core concept of this existing technology is to set a throttle hole. In various states of the valve, the throttle hole can reduce the pressure of the medium entering the sleeve, thereby giving the valve core sufficient opening time to form a larger flow channel, thereby reducing the small flow channel and causing the medium pressure to erode the sealing surface.

[0008] However, the setting of the throttle hole also has serious defects, because even if the valve is fully open, the presence of the sleeve and the throttle hole will still reduce the medium pressure, causing medium pressure loss, thereby affecting the application range of the medium. Summary of the Invention

[0009] In order to reduce the erosion and wear of the sealing surface and improve the sealing durability, the present application provides a slurry valve with high sealing durability.

[0010] The present application provides a slurry valve with high sealing durability, which adopts the following technical solutions: The closure of the valve body is sealed with a cam, and the cam is fixed with a plurality of sealing members, each of which is connected to the closure of the valve body by a plurality of sealing members. The sealing members are fixed with a plurality of sealing members, each of which is connected to the closure of the valve body by a plurality of sealing members. The sealing members are fixed with a plurality of sealing members, each of which is connected to the closure of the valve body by a plurality of sealing members. The back position is protruding with a second convex tooth, which is used to engage with the first convex tooth, and the gap between the tooth groove bottom of the first convex tooth and the tooth top of the second convex tooth and the gap between the tooth top of the first convex tooth and the tooth groove bottom of the second convex tooth is set as a second pressure-reducing hole, the inner diameter of the upper ring plate and the inner diameter of the lower ring plate are connected by a sealing elastic part, and the sealing elastic part is used to force the upper ring plate and the lower ring plate to separate and move vertically; the space enclosed by the groove wall of the expansion groove and the inner wall of the sealing elastic part is set as the first pressure-reducing space, and the space enclosed by the outer wall of the sealing elastic part, the inner wall of the sealing ring, the lower end face of the first connecting ring part, and the upper end face of the second pressure-reducing ring part is set as the second pressure-reducing space, and the two ends of the second pressure-reducing hole are respectively connected to the first pressure-reducing space and the second pressure-reducing space.

[0011] By adopting the above technical solution, in the process from closing to the initial stage of opening the valve (the closed state refers to the sealing edge of the valve disc and the sealing surface of the sealing ring forming a linear seal), the valve disc moves up slightly, and the sealing edge of the valve disc is away from the sealing surface of the sealing ring, and the two form a medium channel. Under the elastic force of the sealing elastic member, the upper ring plate and the lower ring plate are separated and moved vertically, that is, the upper ring plate can move up along with the upward movement of the valve disc, so that the second convex teeth and the first convex teeth continue to maintain a bite fit, and the second pressure-reducing hole is stably formed. At this time, the medium enters the second pressure-reducing hole through the first pressure-reducing hole. In a pressure-reducing space, the medium undergoes primary pressure reduction at this time, and the primary pressure-reducing medium enters the first pressure-reducing space through two second pressure-reducing holes. The primary pressure-reducing medium undergoes secondary pressure reduction to form a secondary pressure-reducing medium, and the secondary pressure-reducing medium passes through the medium channel between the sealing edge and the sealing surface. First, since the pressure of the secondary pressure-reducing medium is relatively small, the erosion and wear of the sealing edge and the sealing surface can be reduced. Secondly, since the flow rate of the medium channel is relatively large, the pressure effect of the medium flowing through the medium channel can be reduced, thereby reducing the erosion and wear of the sealing edge and the sealing surface.

[0012] Moreover, after the valve disc continues to move upward, the sealing edge of the valve disc moves further away from the sealing surface of the sealing ring, the flow rate of the medium channel is larger, and under the elastic force of the sealing elastic member, the upper ring plate continues to move upward with the upward movement of the valve disc, the second convex teeth and the first convex teeth continue to maintain an occlusal fit, and the second pressure reducing hole is stably formed, that is, the pressure reducing effect of the secondary pressure reducing medium is still maintained, thereby reducing the erosion and wear on the sealing edge and the sealing surface.

[0013] When the valve is fully opened (the valve disc is at the highest point), the valve disc is completely separated from the upper ring plate (due to the limited compression and rebound range of the sealing elastic member, the upper movable height of the upper ring plate is limited). At this time, the limitations of the first pressure-reducing hole, the first pressure-reducing space, the second pressure-reducing hole, and the second pressure-reducing space are simultaneously released, that is, there is no obstruction pressure-reducing structure at the connection between the upper valve body and the lower valve body, and the medium can be transported and flowed smoothly, thereby reducing the pressure loss of the medium, so as to facilitate the subsequent transportation and utilization of the medium, such as when used in high-pressure working conditions, thereby increasing the applicability of the medium.

[0014] In summary, by setting the specific structure of the valve disc, the upper ring plate, the lower ring plate and the sealing elastic piece, in the closed state and the initial opening state of the valve, the valve disc moves upward, so that the second protruding teeth and the first protruding teeth are continuously engaged, and the second pressure reduction hole is stably formed, thereby stably reducing the pressure of the medium. At the same time, as the valve disc moves upward, the sealing edge of the valve disc is away from the sealing surface of the sealing ring, and the two form a medium channel, thereby reducing the pressure of the medium flowing through the medium channel, and further reducing the erosion and wear of the sealing edge and the sealing surface. Secondly, when the valve is fully opened, the valve disc is completely separated from the upper ring plate, and the first pressure reduction hole, the first pressure reduction space, the second pressure reduction hole and the second pressure reduction space are released, so that the medium can flow smoothly, thereby reducing the pressure loss of the medium, and further improving the application range of the medium.

[0015] Optionally, the symmetry center line between the generatrix of the process surface and the generatrix of the sealing surface is named as the convergence line, the upper end surface of the upper ring plate and the lower end surface of the lower ring plate are both conical surfaces, the upper end surface of the upper ring plate and the lower end surface of the lower ring plate are both protrudingly provided with the second protruding teeth, the intersection between the axis of the second pressure reduction hole and the convergence line is located in the second pressure reduction space, and the axis of the second pressure reduction hole of the upper ring plate and the axis of the second pressure reduction hole of the lower ring plate are symmetrically arranged with the convergence line as the symmetry center line.

[0016] Optionally, the sealing elastic piece comprises a first metal bellows, the first metal bellows is coaxially arranged with the valve disc, the inner diameter of the upper end and the lower end of the first metal bellows is radially extended inwardly with a matching ring, the opposite surfaces of the upper ring plate and the lower ring plate are both provided with a stepped surface, and the ring surface of the matching ring is attached to the stepped surface; a welding pipe is vertically extended at the inner diameter of the matching ring, and the pipe openings of the two welding pipes are respectively sealingly welded with the inner diameters of the upper ring plate and the lower ring plate.

[0017] Optionally, the bottom outer edge of the second connecting ring part is protrudingly provided with a first protruding ring, the bottom inner edge of the second pressure reduction ring part is protrudingly provided with a second protruding ring, and the radial gap between the second protruding ring and the first protruding ring is set as the first pressure reduction hole; the cross-sectional shape of the tank wall of the expansion tank is C-shaped.

[0018] Optionally, the outer diameter of the first protruding ring, the inner diameter of the second protruding ring, the inner diameter of the sealing surface, the inner diameter of the upper ring plate and the inner diameter of the lower ring plate are all provided with a chamfer.

[0019] Optionally, the connection between the second protruding ring and the second pressure reduction ring part is provided with an annular anti-falling groove, an anti-falling rod is welded and fixed at the inner diameter of the lower ring plate, and the end of the anti-falling rod is vertically movably connected with the anti-falling groove; when the second protruding teeth of the lower ring plate move upward and are separated from the first protruding teeth of the second pressure reduction ring part, the end of the anti-falling rod abuts against the edge of the groove opening of the anti-falling groove.

[0020] Optionally, the sealing elastic member includes a first spring, an upper retaining tube and a lower retaining tube, the first spring is coaxially arranged with the valve disc, the two ends of the first spring are fixedly connected to the upper ring plate and the lower ring plate respectively, the upper retaining tube and the lower retaining tube are coaxially fixedly connected to the upper ring plate and the lower ring plate respectively, the inner wall of the upper retaining tube is in contact with the outer wall of the lower retaining tube, and the upper retaining tube and the lower retaining tube are vertically slidably matched.

[0021] Optionally, the sealing elastic part includes a second spring, a second metal bellows and a third metal bellows, the second spring is coaxially arranged with the valve disc, and the two ends of the second spring are fixedly connected to the upper ring plate and the lower ring plate respectively; the upper end of the second metal bellows is sealingly welded to the upper ring plate, and the lower end of the third metal bellows is sealingly welded to the lower ring plate, and the trough of the second metal bellows elastically abuts against the peak of the third metal bellows.

[0022] Optionally, a fourth metal bellows is also included, the upper and lower ends of the fourth metal bellows are sealed and welded to the upper ring plate and the lower ring plate respectively, the fourth metal bellows is provided with a plurality of micropores, and an extrusion cavity is formed between the inner wall of the fourth metal bellows and the outer wall of the sealing elastic part.

[0023] Optionally, a first separation slit is provided through the tooth top of the first convex tooth, the first separation slit divides the first convex tooth into two first elastic bodies, and the tooth groove of the first convex tooth is provided with a first easily deformable groove located on one side of the tooth root of the first convex tooth; a second separation slit is provided through the tooth top of the second convex tooth, the second separation slit divides the second convex tooth into two second elastic bodies, and the tooth groove of the second convex tooth is provided with a second easily deformable groove located on one side of the tooth root of the second convex tooth; when the upper ring plate and the lower ring plate move toward each other, the adjacent two first elastomers are squeezed by the second elastomer and approach each other, and the adjacent two second elastomers are squeezed by the first elastomer and approach each other, and the size of the first separation slit and the second separation slit are both reduced, and the size of the second pressure reducing hole is reduced.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting the specific structure of the valve disc, the upper ring plate, the lower ring plate and the sealing elastic member, when the valve is closed and in the initial stage of opening, the valve disc moves upward, so that the second convex teeth and the first convex teeth are continuously engaged with each other, and the second pressure-reducing hole is stably formed, thereby stably reducing the pressure of the medium. At the same time, as the valve disc moves upward, the sealing edge of the valve disc moves away from the sealing surface of the sealing ring, and the two form a medium channel, which can reduce the pressure effect of the medium flowing through the medium channel, and further reduce the erosion and wear of the sealing edge and the sealing surface; secondly, when the valve is fully opened, the valve disc is completely separated from the upper ring plate and the restrictions of the first pressure-reducing hole, the first pressure-reducing space, the second pressure-reducing hole and the second pressure-reducing space are released, so that the medium can be smoothly transported and flowed, thereby reducing the pressure loss of the medium and thus improving the applicability of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the overall structure of Example 1.

[0026] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0027] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle.

[0028] Figure 4 yes Figure 3 A partial enlarged view of point C in the middle.

[0029] Figure 5 yes Figure 3 A partial enlarged view of point D in the middle.

[0030] Figure 6 It is a schematic diagram used to illustrate the engagement of the first protruding tooth and the second protruding tooth in Example 1.

[0031] Figure 7 It is a partial cross-sectional view of the upper ring plate and the lower ring plate of Example 1.

[0032] Figure 8 It is a partial cross-sectional view used to show the upper ring plate and the lower ring plate in Example 2.

[0033] Figure 9 It is a partial cross-sectional view used to show the upper ring plate and the lower ring plate in Example 3.

[0034] Figure 10 It is a partial cross-sectional view used to show the upper ring plate and the lower ring plate in Example 4.

[0035] Figure 11 yes Figure 10 A partial enlarged view of point E in the middle.

[0036] Figure 12 It is a schematic diagram used to illustrate the engagement of the first convex tooth and the second convex tooth in Example 5.

[0037] Explanation of reference numerals: 1. valve disc; 3. sealing elastic member; 10. sealing ring; 100. confluence line; 101. lower valve body; 1011. sealing surface; 102. upper valve body; 103. valve stem; 104. valve cover; 105. second pressure-reducing ring portion; 1051. second convex ring; 1052. anti-slip groove; 1053. anti-slip rod; 11. sealing convex ring portion; 111. process surface; 112. sealing edge; 12. first connecting ring portion; 13. first pressure-reducing ring portion; 131. first convex tooth; 1311. first separating gap; 1312. first elastic body; 1313. first easily deformable groove; 14. second connecting ring portion; 141. expansion groove ;142. First convex ring;15. Core;200. First pressure-reducing hole;201. First pressure-reducing space;202. Second pressure-reducing hole;203. Second pressure-reducing space;21. Upper ring plate;211. Second convex tooth;2111. Second separation gap;2112. Second elastomer;2113. Second deformable groove;22. Lower ring plate;31. First metal bellows;311. Fitting ring;312. Welding tube;313. Step surface;32. First spring;33. Upper retaining tube;34. Lower retaining tube;35. Second spring;36. Second metal bellows;37. Third metal bellows;38. Fourth metal bellows;39. Extrusion cavity. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 -Attached Figure 12 This application is described in further detail.

[0039] Example 1: Example 1 discloses a slurry valve with high sealing durability. Figure 1 、 Figure 2 、 Figure 3 As shown ( Figure 1 and Figure 3 The direction of the arrow is the medium flow direction), the slurry valve with high sealing durability includes an upper valve body 102, a lower valve body 101, a valve stem 103, a valve disc 1, a sealing ring 10, an upper ring plate 21 and a lower ring plate 22. The upper valve body 102 and the lower valve body 101 are fixed together by bolts. The sealing ring 10 is fixed to the connection between the upper valve body 102 and the lower valve body 101. The valve stem 103 is vertically arranged. The valve stem 103 passes through the valve cover 104 of the upper valve body 102. The valve disc 1 is fixed to the lower end of the valve stem 103. The valve disc 1 is used to cooperate with the sealing ring 10 for line sealing to block the connection between the upper valve body 102 and the lower valve body 101 to achieve valve closure.

[0040] like Figure 2 、 Figure 3 、 Figure 4As shown, the valve disc 1 includes, radially from the outside to the inside, an integrally formed sealing convex ring portion 11, a first connecting ring portion 12, a first pressure-reducing ring portion 13, a second connecting ring portion 14 and a core portion 15, wherein the bottom outer edge of the sealing convex ring portion 11 has a tapered process surface 111, the process surface 111 has a sealing edge 112, the sealing ring 10 has a tapered sealing surface 1011, the sealing edge 112 and the sealing surface 1011 form a linear seal, and the symmetrical center line between the busbar of the process surface 111 and the busbar of the sealing surface 1011 is named the convergence line 100.

[0041] like Figure 3 、 Figure 5 、 Figure 6 As shown, a second pressure-reducing ring portion 105 is integrally formed at the inner diameter of the upper port of the lower valve body 101. The second pressure-reducing ring portion 105 is coaxially arranged with the valve disc 1. The second pressure-reducing ring portion 105 is lower than the sealing ring 10. The first pressure-reducing ring portion 13 is located directly above the second pressure-reducing ring portion 105. The opposing surfaces of the first pressure-reducing ring portion 13 and the second pressure-reducing ring portion 105 are both conical surfaces. The opposing surfaces of the first pressure-reducing ring portion 13 and the second pressure-reducing ring portion 105 are both protrudingly structured with first convex teeth 131, and each first convex tooth 131 extends along the busbar direction of the opposing surfaces of the first pressure-reducing ring portion 13 and the second pressure-reducing ring portion 105.

[0042] like Figure 5 、 Figure 6 、 Figure 7 As shown, the upper ring plate 21 and the lower ring plate 22 are both coaxially arranged with the valve disc 1, and the upper ring plate 21 and the lower ring plate 22 are located in the axial space between the first pressure-reducing ring portion 13 and the second pressure-reducing ring portion 105. The opposite faces of the upper ring plate 21 and the lower ring plate 22 (the opposite faces are the upper end face of the upper ring plate 21 and the lower end face of the lower ring plate 22) are both conical faces, and the upper end face of the upper ring plate 21 and the lower end face of the lower ring plate 22 are both protruding with second convex teeth 211, and each second convex tooth 211 extends along the busbar direction of the upper end face of the upper ring plate 21 and the lower end face of the lower ring plate 22, respectively.

[0043] The inner diameter of the upper ring plate 21 and the inner diameter of the lower ring plate 22 are connected by the sealing elastic member 3, which is used to force the upper ring plate 21 and the lower ring plate 22 to move vertically apart, that is, the elastic force of the sealing elastic member 3 makes the second protruding teeth 211 and the first protruding teeth 131 keep the state of engaging (the tooth groove wall of the first protruding teeth 131 and the tooth groove wall of the second protruding teeth 211 abut), in which state, the gap between the tooth groove bottom of the first protruding teeth 131 and the tooth top of the second protruding teeth 211 and the gap between the tooth top of the first protruding teeth 131 and the tooth groove bottom of the second protruding teeth 211 are set as the second pressure reducing hole 202. Moreover, the intersection between the axis of the second pressure reducing hole 202 and the convergence line 100 is located in the second pressure reducing space 203, and the axis of the second pressure reducing hole 202 of the upper ring plate 21 and the axis of the second pressure reducing hole 202 of the lower ring plate 22 are symmetrically arranged with the convergence line 100 as the center line.

[0044] In this embodiment, as shown in Figure 5 The sealing elastic member 3 includes a first metal bellows 31, which is coaxially arranged with the valve disc 1, and a matching ring 311 radially extends inward at the inner diameter of the upper end and the lower end of the first metal bellows 31, and the opposite surfaces of the upper ring plate 21 and the lower ring plate 22 are provided with a stepped surface 313, and the ring surface of the matching ring 311 is attached to the stepped surface 313. The welding pipe 312 vertically extends at the inner diameter of the matching ring 311, and the outer peripheral surfaces of the two welding pipes 312 are respectively attached to the inner peripheral surfaces of the upper ring plate 21 and the lower ring plate 22, and the pipe openings of the two welding pipes 312 are respectively sealingly welded with the inner diameters of the upper ring plate 21 and the lower ring plate 22.

[0045] As shown in Figure 3 The second connecting ring part 14 has an expansion groove 141 at the outer diameter, the cross-sectional shape of the groove wall of the expansion groove 141 is C-shaped, the bottom outer edge of the second connecting ring part 14 is protrusively structured as a first protruding ring 142 which is coaxial with the valve disc 1, the bottom inner edge of the second pressure reducing ring part 105 is protrusively structured as a second protruding ring 1051, the axial thickness of the second protruding ring 1051 is smaller than the axial thickness of the first protruding ring 142, the radial gap between the second protruding ring 1051 and the first protruding ring 142 is set as the first pressure reducing hole 200, and the first pressure reducing hole 200 is annular.

[0046] The space enclosed by the groove wall of the expansion groove 141 and the inner wall of the sealing elastic member 3 is set as the first pressure reducing space 201, and the first pressure reducing hole 200 communicates with the first pressure reducing space 201. The space enclosed by the outer wall of the sealing elastic member 3, the inner wall of the sealing ring 10, the lower end surface of the first connecting ring part 12 and the upper end surface of the second pressure reducing ring part 105 is set as the second pressure reducing space 203, and the two ends of the second pressure reducing hole 202 respectively communicate with the first pressure reducing space 201 and the second pressure reducing space 203.

[0047] Moreover, in other embodiments, chamfers are provided at the outer diameter of the first protruding ring 142 , the inner diameter of the second protruding ring 1051 , the inner diameter of the sealing surface 1011 , the inner diameter of the upper ring plate 21 and the inner diameter of the lower ring plate 22 .

[0048] In the process from closing to opening of the valve or when the valve is about to close (the closed state refers to the sealing edge 112 of the valve disc 1 and the sealing surface 1011 of the sealing ring 10 forming a line seal), a medium channel is formed between the sealing edge 112 of the valve disc 1 and the sealing surface 1011 of the sealing ring 10, and under the elastic force of the sealing elastic member 3, the upper ring plate 21 and the lower ring plate 22 are separated and moved vertically, that is, the upper ring plate 21 can move up and down with the up and down movement of the valve disc 1, so that the second convex teeth 211 and the first convex teeth 131 are continuously engaged with each other, and the second pressure reducing hole 202 is stably formed. At this time, the medium enters through the first pressure reducing hole 200 Entering the first pressure-reducing space 201, the medium undergoes primary pressure reduction. The primary pressure-reducing medium enters the first pressure-reducing space 201 through the two second pressure-reducing holes 202. The primary pressure-reducing medium undergoes secondary pressure reduction to form a secondary pressure-reducing medium. The secondary pressure-reducing medium passes through the medium channel between the sealing edge 112 and the sealing surface 1011. First, since the pressure of the secondary pressure-reducing medium is relatively small, the erosion and wear of the sealing edge 112 and the sealing surface 1011 can be reduced. Secondly, since the flow rate of the medium channel is relatively large, the pressure effect of the medium flowing through the medium channel can be reduced, thereby reducing the erosion and wear of the sealing edge 112 and the sealing surface 1011.

[0049] Moreover, in the above process, especially when the valve is about to close, the valve disc 1 can be kept at this height position for a period of time. Since the sealing surface 1011 and the process surface 111 have a certain gap, and the second pressure reducing hole 202 is stably formed, the secondary pressure reducing medium forms two jet streams under the guidance of the second pressure reducing hole 202. The jet streams intersect and collide in the second pressure reducing space 203 to further reduce the medium pressure. At the same time, the confluence direction formed by the intersection and collision is the direction of the confluence line 100, that is, the angle between the direction of the jet confluence and the sealing surface 1011 and the process surface 111 is reduced, which can reduce the scouring force of the jet confluence on the sealing surface 1011 and the process surface 111 to reduce scouring damage, that is, the jet confluence will pass over the sealing surface 1011 and the process surface 111 to take away the residual particles on the sealing surface 1011 and the process surface 111. At the same time, since there is a certain gap between the sealing surface 1011 and the process surface 111, the gap is suitable for the jet confluence to pass through, that is, the jet confluence can cover the sealing surface 1011 and the process surface 111 with a high probability, thereby ensuring the removal effect of residual particles.

[0050] When the valve disc 1 continues to move upward, the sealing edge 112 of the valve disc 1 moves further away from the sealing surface 1011 of the sealing ring 10, the flow rate of the medium channel is larger, and under the elastic force of the sealing elastic member 3, the upper ring plate 21 continues to move upward with the upward movement of the valve disc 1, the second protruding teeth 211 and the first protruding teeth 131 continue to maintain an occlusal fit, and the second pressure reducing hole 202 is stably formed, that is, the pressure reducing effect of the secondary pressure reducing medium is still maintained, thereby reducing the erosion and wear on the sealing edge 112 and the sealing surface 1011.

[0051] When the valve is fully opened (the valve disc 1 is at the highest point), the valve disc 1 is completely separated from the upper ring plate 21 (due to the limited compression and rebound range of the sealing elastic member 3, the upward movable height of the upper ring plate 21 is limited). At this time, the limitations of the first pressure-reducing hole 200, the first pressure-reducing space 201, the second pressure-reducing hole 202, and the second pressure-reducing space 203 are simultaneously released, that is, there is no obstruction pressure-reducing structure at the connection between the upper valve body 102 and the lower valve body 101, and the medium can be transported and flowed smoothly, thereby reducing the pressure loss of the medium, so as to facilitate the subsequent transportation and utilization of the medium, such as when used in high-pressure working conditions, thereby improving the applicability of the medium.

[0052] In summary, by setting the specific structure of the valve disc 1, the upper ring plate 21, the lower ring plate 22 and the sealing elastic member 3, when the valve is about to close and in the initial state of opening, the second convex tooth 211 and the first convex tooth 131 continue to maintain an occlusal fit, and the second pressure-reducing hole 202 is stably formed, thereby stably reducing the pressure of the medium. At the same time, the sealing edge 112 of the valve disc 1 is away from the sealing surface 1011 of the sealing ring 10 to form a medium channel, thereby reducing the pressure of the medium flowing through the medium channel, and thereby reducing the erosion and wear of the sealing edge 112 and the sealing surface 1011; secondly, when the valve is fully opened, the valve disc 1 is completely separated from the upper ring plate 21 and the restrictions of the first pressure-reducing hole 200, the first pressure-reducing space 201, the second pressure-reducing hole 202, and the second pressure-reducing space 203 are released, so that the medium can be transported and flowed smoothly, thereby reducing the pressure loss of the medium and thereby improving the applicable range of the medium.

[0053] In this embodiment, in order to reduce the possibility that the medium will push the lower ring plate 22 away from the lower valve body 101 when the valve is fully opened, the following settings are also made: Figure 3 As shown, an annular anti-slip groove 1052 is provided at the connection between the second convex ring 1051 and the second pressure-reducing ring portion 105, and an anti-slip rod 1053 arranged obliquely downward and outward is welded and fixed at the inner diameter of the lower ring plate 22, and the end of the anti-slip rod 1053 extends into the anti-slip groove 1052, so that the anti-slip rod 1053 is vertically movably connected to the anti-slip groove 1052. When the second protruding tooth 211 of the lower ring plate 22 moves upward and disengages from the first protruding tooth 131 of the second pressure-reducing ring portion 105, the end of the anti-slip rod 1053 abuts against the edge of the slot of the anti-slip groove 1052, that is, the slot of the anti-slip groove 1052 restricts the anti-slip rod 1053 and the lower ring plate 22 from detaching from the lower valve body 101.

[0054] At the same time, when the second protruding teeth 211 of the lower ring plate 22 move upward and disengage from the first protruding teeth 131 of the second pressure-reducing ring portion 105, and when the upper ring plate 21 is separated from the first pressure-reducing ring portion 13, the size of the second pressure-reducing hole 202 is extremely large, and the medium there can more easily flush out the blocking particles in the second pressure-reducing hole 202, thereby playing a role in clearing the blockage.

[0055] Example 2: Example 2 is different from Example 1 in that Figure 8 As shown, the sealing elastic member 3 includes a first spring 32, an upper baffle tube 33 and a lower baffle tube 34. The first spring 32 is coaxially arranged with the valve disc 1. The two ends of the first spring 32 are fixedly connected to the upper ring plate 21 and the lower ring plate 22 respectively. The fixed connection form can be welding. The upper pipe mouth of the upper baffle tube 33 is coaxially fixed with the upper ring plate 21, and the lower pipe mouth of the lower baffle tube 34 is coaxially fixed with the lower ring plate 22. The inner wall of the upper baffle tube 33 fits the outer wall of the lower baffle tube 34, so that the upper baffle tube 33 and the lower baffle tube 34 slide together vertically. The cooperation between the upper baffle tube 33 and the lower baffle plays a sealing role, and the elasticity of the first spring 32 is used to force the upper ring plate 21 and the lower ring plate 22 to move away from each other, so that the second pressure reducing hole 202 is stably formed.

[0056] Compared with the first metal bellows 31 of Example 1, the compression ratio of the first spring 32 of this embodiment is higher, so that the separation range of the upper ring plate 21 and the lower ring plate 22 is larger. The longer the holding time of the second pressure reducing hole 202, the larger the opening and closing distance of the medium channel between the sealing edge 112 and the sealing surface 1011.

[0057] Example 3: Example 3 is different from Example 1 in that Figure 9 As shown, the sealing elastic member 3 includes a second spring 35, a second metal bellows 36 and a third metal bellows 37. The second spring 35 is coaxially arranged with the valve disc 1. The two ends of the second spring 35 are fixedly connected to the upper ring plate 21 and the lower ring plate 22 respectively. The fixed connection form can be welding.

[0058] The upper end of the second metal bellows 36 is sealed and welded to the upper ring plate 21, and there is a vertical gap between the lower end of the second metal bellows 36 and the lower ring plate 22. The lower end of the third metal bellows 37 is sealed and welded to the lower ring plate 22, and there is a vertical gap between the upper end of the third metal bellows 37 and the upper ring plate 21.

[0059] The troughs of the second metal bellows 36 elastically abut against the peaks of the third metal bellows 37 , and this elastic abutment serves as a seal.

[0060] Compared with the first metal bellows 31 of Example 1, the compression ratio of the second spring 35 of this embodiment is higher, so that the separation range of the upper ring plate 21 and the lower ring plate 22 is larger. The longer the holding time of the second pressure reducing hole 202 is, the larger the opening and closing distance of the medium channel between the sealing edge 112 and the sealing surface 1011 is.

[0061] At the same time, under the elastic force of the second spring 35, the upper ring plate 21 and the lower ring plate 22 keep moving away from each other, so that the trough of the second metal bellows 36 and the peak of the third metal bellows 37 repeatedly elastically abut and elastically avoid each other. Therefore, the sealing effect is intermittent, but because the time interval between the repeated elastic abutment and elastic avoidance is extremely short, and the amount of medium in the gap between the second metal bellows 36 and the third metal bellows 37 is small, the sealing effect is more stable than the sealing effect of Example 2 and is less likely to cause large-scale leakage.

[0062] Example 4: Example 4 is different from Example 1 in that Figure 10 、 Figure 11 As shown, the sealing elastic member 3 also includes a fourth metal bellows 38, the upper end and the lower end of the fourth metal bellows 38 are sealed and welded to the upper ring plate 21 and the lower ring plate 22 respectively, and the fourth metal bellows 38 is provided with a plurality of micropores (not marked in the figure), the size of the micropores is smaller than the size of the particles in the medium, and an extrusion cavity 39 is formed between the inner wall of the fourth metal bellows 38 and the outer wall of the sealing elastic member 3.

[0063] When the valve disc 1 moves upward to open the valve, the elastic force of the first metal bellows 31 and the fourth metal bellows 38 drives the upper ring plate 21 to move upward, the volume of the extrusion chamber 39 increases, and the medium in the second pressure reduction space 203 enters the extrusion chamber 39 through the micropores. At this time, the particles in the medium are filtered by the micropores, and the extrusion chamber 39 contains pure medium.

[0064] When the valve disc 1 moves downward, the upper ring plate 21 moves downward, and the sealing edge 112 and the sealing surface 1011 form a medium channel. At this time, the downward pressure of the upper ring plate 21 squeezes out the pure medium in the extrusion cavity 39. The pure medium is ejected through the micropores, thereby removing residual particles in the medium channel. The pure medium can also reduce the occurrence of particles re-adhering to the medium channel.

[0065] Example 5: Example 5 is different from Example 1 in that Figure 12As shown, a first separation slit 1311 is formed through the tooth top of the first protruding tooth 131 , which divides the first protruding tooth 131 into two first elastic bodies 1312 . A first deformable groove 1313 is formed in the tooth groove of the first protruding tooth 131 and is located on one side of the tooth root of the first protruding tooth 131 .

[0066] A second separation slit 2111 is formed on the top of the second tooth 211 , which divides the second tooth 211 into two second elastic bodies 2112 . A second deformable groove 2113 is formed on the tooth groove of the second tooth 211 , which is located on one side of the tooth root of the second tooth 211 .

[0067] When the upper ring plate 21 and the lower ring plate 22 move toward each other, the two adjacent first elastic bodies 1312 are squeezed by the tooth groove wall of the second elastic body 2112 and approach each other, and the two adjacent second elastic bodies 2112 are squeezed by the tooth groove wall of the first elastic body 1312 and approach each other, that is, the sizes of the first separating slit 1311 and the second separating slit 2111 are both reduced, and the size of the second pressure reducing hole 202 is reduced.

[0068] When the upper ring plate 21 and the lower ring plate 22 move apart, the two adjacent first elastic bodies 1312 recover their deformation, and the two adjacent second elastic bodies 2112 recover their deformation, that is, the sizes of the first separation gap 1311 and the second separation gap 2111 are both enlarged, and the size of the second pressure reducing hole 202 is enlarged.

[0069] In this way, the elastic deformation of the first elastomer 1312 and the second elastomer 2112 can control the size of the first partition slit 1311, the second partition slit 2111 and the second pressure reducing hole 202, thereby loosening or crushing the blocked particles at the above positions to reduce the interlocking effect of large and small particles; and, it can also improve the pressure reduction effect and the strength of the jet confluence, thereby improving the particle cleaning effect.

[0070] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A slurry valve with high sealing durability, characterized by: The valve disc (1) comprises an upper valve body (102), a lower valve body (101), a valve disc (1), a sealing ring (10), an upper ring plate (21) and a lower ring plate (22); the sealing ring (10) is fixed at the connection between the upper valve body (102) and the lower valve body (101); the sealing ring (10) has a conical sealing surface (1011); the valve disc (1) comprises, from the outside to the inside, an integrally formed sealing convex ring portion (11), a first connecting ring portion (12), a first pressure-reducing ring portion (13), a second connecting ring portion (14) and a core portion (15); The sealing convex ring portion (11) has a conical process surface (111), the process surface (111) has a sealing edge (112), the sealing edge (112) and the sealing surface (1011) are in line sealing cooperation, the outer diameter of the second connecting ring portion (14) has an expansion groove (141), the inner diameter of the upper port of the lower valve body (101) is integrally formed with a second pressure-reducing ring portion (105), and the relative positions of the first pressure-reducing ring portion (13) and the second pressure-reducing ring portion (105) are both protruded with a first convex tooth (131); the upper ring plate (21) and The lower ring plate (22) is provided with a second protruding tooth (211) at the opposite position. The second protruding tooth (211) is used to engage with the first protruding tooth (131). The gap between the tooth groove bottom of the first protruding tooth (131) and the tooth top of the second protruding tooth (211) and the gap between the tooth top of the first protruding tooth (131) and the tooth groove bottom of the second protruding tooth (211) are both set as the second pressure reducing hole (202). The inner diameter of the upper ring plate (21) and the inner diameter of the lower ring plate (22) are connected by a sealing elastic member (3). The sealing elastic member (3) is used to force The upper ring plate (21) and the lower ring plate (22) are separated and moved vertically; the space enclosed by the groove wall of the expansion groove (141) and the inner wall of the sealing elastic member (3) is set as the first pressure reduction space (201); the space enclosed by the outer wall of the sealing elastic member (3), the inner wall of the sealing ring (10), the lower end surface of the first connecting ring portion (12), and the upper end surface of the second pressure reduction ring portion (105) is set as the second pressure reduction space (203); and the two ends of the second pressure reduction hole (202) are respectively connected to the first pressure reduction space (201) and the second pressure reduction space (203).

2. The slurry valve with high sealing durability according to claim 1, characterized in that: The symmetry center line between the generatrix of the process surface (111) and the generatrix of the sealing surface (1011) is named as the convergence line (100); the upper end surface of the upper ring plate (21) and the lower end surface of the lower ring plate (22) are both conical surfaces; the upper end surface of the upper ring plate (21) and the lower end surface of the lower ring plate (22) are both protrudingly structured with the second convex teeth (211); the intersection between the axis of the second pressure reducing hole (202) and the convergence line (100) is located in the second pressure reducing space (203); and the axis of the second pressure reducing hole (202) of the upper ring plate (21) and the axis of the second pressure reducing hole (202) of the lower ring plate (22) are symmetrically arranged with the convergence line (100) as the symmetry center line.

3. The slurry valve with high sealing durability according to claim 1, characterized in that: The sealing elastic member (3) comprises a first metal bellows (31), which is coaxially arranged with the valve disc (1); matching rings (311) are radially extended inwardly from the inner diameters of the upper and lower ends of the first metal bellows (31); the opposing surfaces of the upper ring plate (21) and the lower ring plate (22) are provided with step surfaces (313); the annular surface of the matching ring (311) is in contact with the step surface (313); a welding tube (312) is vertically extended from the inner diameter of the matching ring (311); the pipe openings of the two welding tubes (312) are respectively sealed and welded to the inner diameters of the upper ring plate (21) and the lower ring plate (22).

4. The slurry valve with high sealing durability according to claim 2, characterized in that: The bottom outer edge of the second connecting ring portion (14) is protruded with a first protruding ring (142), and the bottom inner edge of the second pressure-reducing ring portion (105) is protruded with a second protruding ring (1051), and the radial gap between the second protruding ring (1051) and the first protruding ring (142) is set as a first pressure-reducing hole (200); the groove wall cross-section of the expansion groove (141) is C-shaped.

5. The slurry valve with high sealing durability according to claim 4, characterized in that: Chamfers are provided at the outer diameter of the first convex ring (142), the inner diameter of the second convex ring (1051), the inner diameter of the sealing surface (1011), the inner diameter of the upper ring plate (21), and the inner diameter of the lower ring plate (22).

6. The slurry valve with high sealing durability according to claim 4, characterized in that: An annular anti-slip groove (1052) is provided at the connection between the second convex ring (1051) and the second pressure-reducing ring portion (105), and an anti-slip rod (1053) is welded and fixed at the inner diameter of the lower ring plate (22), and the end of the anti-slip rod (1053) is vertically movably connected to the anti-slip groove (1052); when the second convex tooth (211) of the lower ring plate (22) moves upward and disengages from the first convex tooth (131) of the second pressure-reducing ring portion (105), the end of the anti-slip rod (1053) abuts against the edge of the notch of the anti-slip groove (1052).

7. The slurry valve with high sealing durability according to claim 1 or 2, characterized in that: The sealing elastic member (3) comprises a first spring (32), an upper retaining tube (33) and a lower retaining tube (34); the first spring (32) is coaxially arranged with the valve flap (1); the two ends of the first spring (32) are fixedly connected to the upper ring plate (21) and the lower ring plate (22) respectively; the upper retaining tube (33) and the lower retaining tube (34) are coaxially fixedly connected to the upper ring plate (21) and the lower ring plate (22) respectively; the inner wall of the upper retaining tube (33) is in contact with the outer wall of the lower retaining tube (34); and the upper retaining tube (33) and the lower retaining tube (34) are vertically slidably matched.

8. The slurry valve with high sealing durability according to claim 2, characterized in that: The sealing elastic member (3) comprises a second spring (35), a second metal bellows (36) and a third metal bellows (37); the second spring (35) is coaxially arranged with the valve flap (1); the two ends of the second spring (35) are fixedly connected to the upper ring plate (21) and the lower ring plate (22), respectively; the upper end of the second metal bellows (36) is sealed and welded to the upper ring plate (21); the lower end of the third metal bellows (37) is sealed and welded to the lower ring plate (22); the trough of the second metal bellows (36) elastically abuts against the peak of the third metal bellows (37).

9. The slurry valve with high sealing durability according to claim 3 or 8, characterized in that: The fourth metal bellows (38) is also included. The upper end and the lower end of the fourth metal bellows (38) are sealed and welded to the upper ring plate (21) and the lower ring plate (22) respectively. The fourth metal bellows (38) is provided with a plurality of micropores. An extrusion cavity (39) is formed between the inner wall of the fourth metal bellows (38) and the outer wall of the sealing elastic member (3).

10. The slurry valve with high sealing durability according to claim 1 or 2, characterized in that: The tooth top of the first convex tooth (131) is provided with a first separation slit (1311), which divides the first convex tooth (131) into two first elastic bodies (1312); the tooth groove of the first convex tooth (131) is provided with a first deformable groove (1313) located on one side of the tooth root of the first convex tooth (131); the tooth top of the second convex tooth (211) is provided with a second separation slit (2111), which divides the second convex tooth (211) into two second elastic bodies (2112); the second convex tooth (211) is provided with a second separation slit (2111), which divides the second convex tooth (211) into two second elastic bodies (2112); the second convex tooth (211) is provided with a first deformable groove (1313) located on one side of the tooth root of the first convex tooth (131); The tooth groove of the upper ring plate (21) is provided with a second deformable groove (2113) located on one side of the tooth root of the second convex tooth (211); when the upper ring plate (21) and the lower ring plate (22) move toward each other, two adjacent first elastic bodies (1312) are pressed by the second elastic body (2112) and approach each other, and two adjacent second elastic bodies (2112) are pressed by the first elastic body (1312) and approach each other, and the sizes of the first separation gap (1311) and the second separation gap (2111) are reduced, and the size of the second pressure reducing hole (202) is reduced.

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