A slurry valve with high sealing durability

Abstract

The application relates to a slurry valve with high sealing durability, belonging to the slurry valve field, which comprises an upper valve body, a lower valve body, a valve flap, a sealing ring, an upper ring plate and a lower ring plate, the relative positions of a first pressure reduction ring part and a second pressure reduction ring part are protrusively provided with first protruding teeth; the opposite positions of the upper ring plate and the lower ring plate are protrusively provided with second protruding teeth, the gap between the tooth groove bottom of the first protruding teeth and the tooth top of the second protruding teeth and the gap between the tooth top of the first protruding teeth and the tooth groove bottom of the second protruding teeth are set as second pressure reduction holes, the inner diameters of the upper ring plate and the lower ring plate are connected through a sealing elastic piece, the sealing elastic piece is used for forcing the vertical separation movement of the upper ring plate and the lower ring plate; the space surrounded 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 surrounded 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. The application can reduce the erosion and wear of the sealing surface, so as to improve the sealing durability.

Description

Technical Field

[0001] This application relates to the field of slurry valves, and more particularly to a slurry valve with high sealing durability. Background Technology

[0002] Currently, the pipeline control valves used in high-pressure slurry conveying systems are mainly Y-type slurry valves. During operation, the conveyed medium contains a large number of suspended solid particles, some of which are corrosive. Therefore, the sealing surface of the valve seat becomes the flow surface when the valve is open, and it is subjected to strong erosion, which can easily lead to sealing failure of the Y-type slurry valve and significantly shorten its service life.

[0003] Chinese patent application number 2020114968827 discloses a valve core assembly for a mud regulating valve, which includes a valve core, a valve seat, a sleeve, and a valve plug. The sleeve has a sleeve hole with a circular cross-sectional shape. Multiple throttling holes are arranged circumferentially in the middle of the sleeve. The valve seat has a valve hole with an annular structure that is larger at the top and smaller at the bottom. The valve hole consists of a conical sealing hole section and a cylindrical blocking hole section from top to bottom. The valve core and the inner surface of the sealing part of the valve seat are sealed together.

[0004] When the valve core and valve seat are in sealing engagement, the valve plug is inserted into the flow-blocking section, and the valve core is positioned within the sleeve bore. The middle part of the valve core is located at the middle of the sleeve, forming a first annular expansion and pressure-reducing space between the lower part of the valve core and the lower part of the sleeve. A second annular expansion and pressure-reducing space is formed between the valve core, valve seat, and valve plug. This valve core assembly ensures that the valve seal is protected in any operating state, including opening, closing, and regulation, guaranteeing the integrity of the sealing surface.

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

[0006] When the valve is closed, the valve plug first blocks the flow, and the throttling orifice is blocked by the valve core moving synchronously. At this time, there is basically no flow passing through the sealing surface, and the sealing surface is not eroded.

[0007] As can be seen from the above, the core concept of this prior art is that by setting a throttling orifice, the throttling orifice can reduce the pressure of the medium entering the sleeve in all states of the valve, thereby giving the valve core enough opening time to form a larger flow channel, thus reducing the occurrence of medium pressure eroding the sealing surface due to a small flow channel.

[0008] However, the design of the throttling orifice also has serious drawbacks, because even if the valve is fully open, the presence of the sleeve and the throttling orifice will still reduce the medium pressure, causing medium pressure loss and thus affecting the applicable range of the medium. Summary of the Invention

[0009] To reduce erosion and wear on the sealing surface and improve sealing durability, this application provides a slurry valve with high sealing durability.

[0010] This application provides a slurry valve with high sealing durability, which adopts the following technical solution:

[0011] A high-sealing and durable slurry valve includes an upper valve body, a lower valve body, a valve disc, a sealing ring, an upper ring plate, and a lower ring plate. The sealing ring is fixed at the connection between the upper and lower valve bodies and has a conical sealing surface. The valve disc, from the outside to the inside, includes an integrally formed sealing convex ring, a first connecting ring, a first pressure-reducing ring, a second connecting ring, and a core. The sealing convex ring has a conical process surface with a sealing edge, and the sealing edge and the sealing surface are in a line-sealing fit. The outer diameter of the second connecting ring has an expansion groove. The inner diameter of the upper port of the lower valve body has an integrally formed second pressure-reducing ring. The relative positions of the first and second pressure-reducing rings both have a first protruding tooth structure. The upper and lower ring plates are... The back of each part has a protruding second tooth, which is used to mesh with the first tooth. The gap between the bottom of the groove of the first tooth and the top of the second tooth, and the gap between the top of the first tooth and the bottom of the groove of the second tooth, are set as the 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 element, which is used to force the upper ring plate and the lower ring plate to move vertically apart. The space enclosed by the wall of the expansion groove and the inner wall of the sealing elastic element is set as the first pressure reducing space. The space enclosed by the outer wall of the sealing elastic element, the inner wall of the sealing ring, the lower end face of the first connecting ring, and the upper end face of the second pressure reducing ring is set as the second pressure reducing space. The two ends of the second pressure reducing hole are respectively connected to the first pressure reducing space and the second pressure reducing space.

[0012] By adopting the above technical solution, during the initial process of the valve moving from closed to open (the closed state refers to the valve disc's sealing edge and the sealing surface of the sealing ring forming a line seal), the valve disc moves slightly upward, and the sealing edge of the valve disc moves away from the sealing surface of the sealing ring. The two form a medium channel, and under the elastic force of the sealing elastic element, the upper and lower ring plates move vertically apart. That is, the upper ring plate can move upward along with the valve disc, ensuring that the second convex tooth and the first convex tooth maintain a continuous meshing engagement. 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. Within a pressure-reducing space, the medium undergoes a first pressure reduction. The first-pressure-reduced medium enters the first pressure-reducing space through two second pressure-reducing holes. The first-pressure-reduced medium undergoes a second pressure reduction to form a second-pressure-reduced medium. The second-pressure-reduced medium then passes through the medium channel between the sealing edge and the sealing surface. Firstly, because the pressure of the second-pressure-reduced medium is lower, it can reduce the erosion and wear on the sealing edge and sealing surface. Secondly, because the flow rate of this medium channel is larger, it can reduce the pressure of the medium flowing through the medium channel, thereby reducing the erosion and wear on the sealing edge and sealing surface.

[0013] Furthermore, as 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, resulting in a larger flow rate in the medium channel. Under the elastic force of the sealing elastic element, the upper ring plate continues to move upward along with the valve disc, and the second convex tooth and the first convex tooth maintain a continuous meshing fit. The second pressure-reducing hole is stably formed, meaning that the pressure-reducing effect of the secondary pressure-reducing medium is still maintained, thus reducing the erosion and wear on the sealing edge and sealing surface.

[0014] When the valve is fully open (valve disc at its highest point), the valve disc completely disengages from the upper ring plate (due to the limited compression and rebound range of the sealing elastic element, the upper ring plate has a limited upward movement height). 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 and lower valve bodies, and the medium can be smoothly transported and flowed, thereby reducing the pressure loss of the medium and facilitating its subsequent transport and utilization, such as in high-pressure conditions, thereby improving the applicability of the medium.

[0015] In summary, by designing the specific structure of the valve disc, the upper ring plate, the lower ring plate, and the sealing elastic element, the valve disc moves upward in the closed state and at the initial opening stage, allowing the second convex tooth to maintain continuous engagement with the first convex tooth, and the second pressure-reducing hole to form stably, thereby stabilizing the pressure reduction of the medium. Simultaneously, as the valve disc moves upward, the sealing edge of the valve disc moves away from the sealing surface of the sealing ring, forming a medium channel. This reduces the pressure of the medium flowing through this channel, thus reducing erosion and wear on the sealing edge and sealing surface. Furthermore, when the valve is fully open, the valve disc completely disengages from the upper ring plate, simultaneously releasing the constraints of the first pressure-reducing hole, the first pressure-reducing space, the second pressure-reducing hole, and the second pressure-reducing space, allowing the medium to flow smoothly, thereby reducing pressure loss and improving the applicability of the medium.

[0016] Optionally, the symmetrical center line between the generatrix of the process surface and the generatrix of the sealing surface is named the confluence line. The upper end face of the upper ring plate and the lower end face of the lower ring plate are both conical surfaces. The upper end face of the upper ring plate and the lower end face of the lower ring plate are both convexly constructed with the second protruding tooth. The intersection point between the axis of the second pressure reducing hole and the confluence line is located within the second pressure reducing space. The axis of the second pressure reducing hole of the upper ring plate and the axis of the second pressure reducing hole of the lower ring plate are symmetrically arranged with the confluence line as the symmetrical center line.

[0017] Optionally, the sealing elastic element includes a first metal bellows, which is coaxially arranged with the valve disc. A mating ring extends radially inward from the inner diameter of both the upper and lower ends of the first metal bellows. The opposing surfaces of the upper and lower ring plates are provided with stepped surfaces, and the ring surface of the mating ring fits against the stepped surface. A welded tube extends vertically from the inner diameter of the mating ring, and the ends of the two welded tubes are respectively sealed and welded to the inner diameter of the upper and lower ring plates.

[0018] Optionally, the bottom outer edge of the second connecting ring portion has a protruding first protruding ring, and the bottom inner edge of the second pressure reducing ring portion has a protruding second protruding ring. The radial gap between the second protruding ring and the first protruding ring is set as the first pressure reducing hole. The cross-sectional shape of the expansion groove wall is C-shaped.

[0019] Optionally, chamfers are provided at the outer diameter of the first convex ring, the inner diameter of the second convex 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.

[0020] Optionally, an annular anti-detachment groove is provided at the connection between the second convex ring and the second pressure reducing ring. An anti-detachment rod is welded and fixed at the inner diameter of the lower ring plate, and the end of the anti-detachment rod is vertically and movably connected to the anti-detachment groove. When the second convex tooth of the lower ring plate moves upward and disengages from the first convex tooth of the second pressure reducing ring, the end of the anti-detachment rod abuts against the edge of the groove opening of the anti-detachment groove.

[0021] Optionally, the sealing elastic element includes a first spring, an upper stop tube, and a lower stop tube. The first spring is coaxially arranged with the valve disc, and the two ends of the first spring are fixedly connected to the upper ring plate and the lower ring plate, respectively. The upper stop tube and the lower stop tube are coaxially fixedly connected to the upper ring plate and the lower ring plate, respectively. The inner wall of the upper stop tube is in contact with the outer wall of the lower stop tube, and the upper stop tube and the lower stop tube slide vertically together.

[0022] Optionally, the sealing elastic element includes a second spring, a second metal bellows, and a third metal bellows. The second spring is coaxially arranged with the valve disc, and both 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 sealed and welded to the upper ring plate, and the lower end of the third metal bellows is sealed and welded to the lower ring plate. The troughs of the second metal bellows and the crests of the third metal bellows elastically abut against each other.

[0023] Optionally, it also includes a fourth metal bellows, the upper and lower ends of which are respectively sealed and welded to the upper ring plate and the lower ring plate. The fourth metal bellows is provided with multiple micropores, and a compression cavity is formed between the inner wall of the fourth metal bellows and the outer wall of the sealing elastic element.

[0024] Optionally, the tip of the first protruding tooth is provided with a first dividing slit, which divides the first protruding tooth into two first elastic bodies. The tooth groove of the first protruding tooth is provided with a first deformable groove located on one side of the tooth root. The tip of the second protruding tooth is provided with a second dividing slit, which divides the second protruding tooth into two second elastic bodies. The tooth groove of the second protruding tooth is provided with a second deformable groove located on one side of the tooth root. When the upper ring plate and the lower ring plate move towards each other, the two adjacent first elastic bodies move closer to each other under the compression of the second elastic bodies, and the two adjacent second elastic bodies move closer to each other under the compression of the first elastic bodies. The size of both the first dividing slit and the second dividing slit decreases, and the size of the second pressure reducing hole decreases.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting the specific structure of the valve disc, upper ring plate, lower ring plate, and sealing elastic element, the valve disc moves upward in the closed state and at the initial opening stage, so that the second convex tooth and the first convex tooth maintain continuous meshing and the second pressure reducing hole is stably formed, thereby stabilizing the pressure reduction 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, thereby reducing the pressure of the medium flowing through the medium channel and thus reducing the erosion and wear on the sealing edge and sealing surface. Secondly, when the valve is fully open, the valve disc completely disengages from the upper ring plate and releases the restriction of the first pressure reducing hole, the first pressure reducing space, the second pressure reducing hole, and the second pressure reducing space, allowing the medium to flow smoothly, thereby reducing the pressure loss of the medium and improving the applicability of the medium. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1.

[0028] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 yes Figure 2 A magnified view of a section at point B.

[0030] Figure 4 yes Figure 3 A magnified view of a section at point C.

[0031] Figure 5 yes Figure 3 A magnified view of a section at point D.

[0032] Figure 6 This is a schematic diagram used in Example 1 to demonstrate the meshing of the first and second convex teeth.

[0033] Figure 7 This is a partial cross-sectional view of the upper and lower ring plates of Embodiment 1.

[0034] Figure 8 This is a partial cross-sectional view used in Embodiment 2 to show the upper and lower ring plates.

[0035] Figure 9 This is a partial cross-sectional view used in Embodiment 3 to show the upper and lower ring plates.

[0036] Figure 10 This is a partial cross-sectional view used in Example 4 to show the upper and lower ring plates.

[0037] Figure 11 yes Figure 10 A magnified view of a section at point E in the middle.

[0038] Figure 12This is a schematic diagram used in Example 5 to demonstrate the meshing of the first and second convex teeth.

[0039] Explanation of reference numerals in the attached drawings: 1. Valve disc; 3. Sealing elastic element; 10. Sealing ring; 100. Merging line; 101. Lower valve body; 1011. Sealing surface; 102. Upper valve body; 103. Valve stem; 104. Valve cover; 105. Second pressure reducing ring; 1051. Second convex ring; 1052. Anti-detachment groove; 1053. Anti-detachment rod; 11. Sealing convex ring; 111. Process surface; 112. Sealing edge; 12. First connecting ring; 13. First pressure reducing ring; 131. First convex tooth; 1311. First separation seam; 1312. First elastic element; 1313. First deformable groove; 14. Second connecting ring; 141. Expansion groove ; 142, First protruding 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 protruding tooth; 2111, Second partition seam; 2112, Second elastic body; 2113, Second deformable groove; 22, Lower ring plate; 31, First metal bellows; 311, Matching ring; 312, Welded pipe; 313, Stepped surface; 32, First spring; 33, Upper stop tube; 34, Lower stop tube; 35, Second spring; 36, Second metal bellows; 37, Third metal bellows; 38, Fourth metal bellows; 39, Extrusion chamber. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12 This application will be described in further detail.

[0041] Example 1: Example 1 discloses a slurry valve with high sealing durability. For example... Figure 1 , Figure 2 , Figure 3 As shown ( Figure 1 and Figure 3 (The arrow indicates the direction of medium flow). The high-sealing and durable slurry valve 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 at the connection between the upper valve body 102 and the lower valve body 101. The valve stem 103 is vertically arranged and passes through the valve cover 104 of the upper valve body 102. The valve disc 1 is fixed at the lower end of the valve stem 103. The valve disc 1 is used to form a line seal with the sealing ring 10 to block the connection between the upper valve body 102 and the lower valve body 101, thereby closing the valve.

[0042] like Figure 2 , Figure 3 , Figure 4As shown, the valve disc 1 includes, from the outside to the inside, an integrally formed sealing convex ring 11, a first connecting ring 12, a first pressure reducing ring 13, a second connecting ring 14, and a core 15 in a radial direction. The sealing convex ring 11 has a tapered process surface 111 at its bottom outer edge. 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 are in a line seal fit. The symmetrical center line between the generatrix of the process surface 111 and the generatrix of the sealing surface 1011 is named the confluence line 100.

[0043] like Figure 3 , Figure 5 , Figure 6 As shown, a second pressure-reducing ring 105 is integrally formed at the inner diameter of the upper port of the lower valve body 101. The second pressure-reducing ring 105 is coaxially arranged with the valve disc 1. The second pressure-reducing ring 105 is lower than the sealing ring 10. The first pressure-reducing ring 13 is located directly above the second pressure-reducing ring 105. The opposing surfaces of the first pressure-reducing ring 13 and the second pressure-reducing ring 105 are both conical surfaces. The opposing surfaces of the first pressure-reducing ring 13 and the second pressure-reducing ring 105 are both convexly constructed with first protruding teeth 131. Each first protruding tooth 131 extends along the generatrix direction of the opposing surfaces of the first pressure-reducing ring 13 and the second pressure-reducing ring 105.

[0044] 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. The upper ring plate 21 and the lower ring plate 22 are located in the axial space between the first pressure reducing ring part 13 and the second pressure reducing ring part 105. The opposite surfaces of the upper ring plate 21 and the lower ring plate 22 (the opposite surfaces 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 surfaces. 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 protruding teeth 211. Each second protruding tooth 211 extends along the generatrix direction of the upper end face of the upper ring plate 21 and the lower end face of the lower ring plate 22, respectively.

[0045] The inner diameters of the upper ring plate 21 and the lower ring plate 22 are connected by a sealing elastic element 3. The sealing elastic element 3 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 element 3 makes the second protruding tooth 211 and the first protruding tooth 131 maintain a meshing engagement state (the tooth groove wall of the first protruding tooth 131 and the tooth groove wall of the second protruding tooth 211 abut against each other). In this state, the gap between the tooth groove bottom of the first protruding tooth 131 and the tooth tip of the second protruding tooth 211, as well as the gap between the tooth tip of the first protruding tooth 131 and the tooth groove bottom of the second protruding tooth 211, are set as the second pressure-reducing hole 202. Furthermore, the intersection point between the axis of the second pressure-reducing hole 202 and the confluence line 100 is located within 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 confluence line 100 as the center line of symmetry.

[0046] In this embodiment, as Figure 5 As shown, the sealing elastic element 3 includes a first metal bellows 31, which is coaxially arranged with the valve disc 1. A mating ring 311 extends radially inward from the inner diameter of both the upper and lower ends of the first metal bellows 31. A stepped surface 313 is provided on the opposing surfaces of the upper ring plate 21 and the lower ring plate 22, and the annular surface of the mating ring 311 fits against the stepped surface 313. A welded tube 312 extends vertically from the inner diameter of the mating ring 311. The outer circumferential surfaces of the two welded tubes 312 respectively fit against the inner circumferential surfaces of the upper ring plate 21 and the lower ring plate 22, and the ends of the two welded tubes 312 are respectively sealed and welded to the inner diameter of the upper ring plate 21 and the lower ring plate 22.

[0047] like Figure 3 As shown, the outer diameter of the second connecting ring 14 has an expansion groove 141, 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 14 has a protruding first protruding ring 142, the first protruding ring 142 is coaxial with the valve disc 1, the bottom inner edge of the second pressure reducing ring 105 has a protruding second protruding ring 1051, the axial thickness of the second protruding ring 1051 is less 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, the first pressure reducing hole 200 is annular.

[0048] The space enclosed by the wall of the expansion groove 141 and the inner wall of the sealing elastic element 3 is designated as the first pressure-reducing space 201, and the first pressure-reducing hole 200 is connected to the first pressure-reducing space 201. The space enclosed by the outer wall of the sealing elastic element 3, the inner wall of the sealing ring 10, the lower end face of the first connecting ring portion 12, and the upper end face of the second pressure-reducing ring portion 105 is designated as the second pressure-reducing space 203, and the two ends of the second pressure-reducing hole 202 are connected to the first pressure-reducing space 201 and the second pressure-reducing space 203, respectively.

[0049] Furthermore, in other embodiments, 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.

[0050] During the initial opening process from valve closure to opening, or when the valve is about to close (the closed state refers to the line seal between the sealing edge 112 of valve disc 1 and the sealing surface 1011 of sealing ring 10), a medium channel is formed between the sealing edge 112 of valve disc 1 and the sealing surface 1011 of sealing ring 10. Under the elastic force of sealing elastic element 3, upper ring plate 21 and lower ring plate 22 move vertically apart, that is, upper ring plate 21 can move up and down with the valve disc 1, so that the second protrusion 211 and the first protrusion 131 maintain a continuous meshing engagement, and the second pressure reducing hole 202 is stably formed. At this time, the medium enters through the first pressure reducing hole 200. The medium enters the first pressure-reducing space 201. At this time, the medium undergoes a first pressure reduction. The first pressure-reduced medium enters the first pressure-reducing space 201 through two second pressure-reducing holes 202. The first pressure-reduced medium undergoes a second pressure reduction to form a second pressure-reduced medium. The second pressure-reduced medium then passes through the medium channel between the sealing edge 112 and the sealing surface 1011. Firstly, because the pressure of the second pressure-reduced medium is relatively small, it can reduce the erosion and wear on the sealing edge 112 and the sealing surface 1011. Secondly, because the flow rate of this medium channel is relatively large, it can reduce the pressure of the medium flowing through the medium channel, thereby reducing the erosion and wear on the sealing edge 112 and the sealing surface 1011.

[0051] Furthermore, during the above process, especially when the valve is about to close, the valve disc 1 can be held 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 converge and collide in the second pressure reducing space 203 to further reduce the medium pressure. At the same time, the direction of the convergence 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, so as to reduce scouring damage. That is, the jet confluence will sweep across the sealing surface 1011 and the process surface 111 to remove the particle residue on the sealing surface 1011 and the process surface 111. Meanwhile, since the sealing surface 1011 and the process surface 111 have a certain gap, this 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 particle residue.

[0052] As valve disc 1 continues to move upward, the sealing edge 112 of valve disc 1 moves further away from the sealing surface 1011 of sealing ring 10, resulting in a larger flow rate in the medium channel. Under the elastic force of sealing elastic element 3, upper ring plate 21 continues to move upward along with valve disc 1. The second protrusion 211 and the first protrusion 131 maintain a continuous meshing engagement, and the second pressure reducing hole 202 is stably formed, meaning that the pressure reducing effect of the secondary pressure reducing medium is still maintained, thus reducing the erosion and wear on sealing edge 112 and sealing surface 1011.

[0053] When the valve is fully opened (valve disc 1 is at its highest point), valve disc 1 completely disengages from the upper ring plate 21 (due to the limited compression and rebound range of the sealing elastic element 3, the upper ring plate 21 has a limited upward movement height). 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 smoothly transported and flowed, thereby reducing the pressure loss of the medium and facilitating its subsequent transport and utilization, such as in high-pressure conditions, thereby improving the applicability of the medium.

[0054] In summary, by setting the specific structure of valve disc 1, upper ring plate 21, lower ring plate 22, and sealing elastic element 3, in the valve's about-closed state and initial opening state, the second protrusion 211 and the first protrusion 131 maintain continuous meshing, 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 valve disc 1 is far away from the sealing surface 1011 of sealing ring 10, forming a medium channel, which can reduce the pressure of the medium flowing through the medium channel, thereby reducing the scouring and wear on the sealing edge 112 and sealing surface 1011. Secondly, when the valve is fully open, valve disc 1 completely disengages from upper ring plate 21 and simultaneously releases the constraints of first pressure-reducing hole 200, first pressure-reducing space 201, second pressure-reducing hole 202, and second pressure-reducing space 203, allowing the medium to flow smoothly, thereby reducing the pressure loss of the medium and improving the applicability of the medium.

[0055] In this embodiment, to reduce the likelihood of the medium pushing the lower ring plate 22 away from the lower valve body 101 when the valve is fully open, the following settings are also made: Figure 3 As shown, an annular anti-detachment groove 1052 is provided at the connection between the second convex ring 1051 and the second pressure reducing ring 105. An anti-detachment rod 1053, inclined downward and outward, is welded and fixed at the inner diameter of the lower ring plate 22. The end of the anti-detachment rod 1053 extends into the anti-detachment groove 1052, so that the anti-detachment rod 1053 and the anti-detachment groove 1052 are vertically and movably connected.

[0056] When the second protrusion 211 of the lower ring plate 22 moves upward and disengages from the first protrusion 131 of the second pressure reducing ring 105, the end of the anti-disengagement rod 1053 abuts against the edge of the groove of the anti-disengagement groove 1052, that is, the groove of the anti-disengagement groove 1052 restricts the anti-disengagement rod 1053 and the lower ring plate 22 from disengaging from the lower valve body 101.

[0057] At the same time, when the second protrusion 211 of the lower ring plate 22 moves upward and separates from the first protrusion 131 of the second pressure reducing ring 105, when the upper ring plate 21 separates from the first pressure reducing ring 13, the size of the second pressure reducing hole 202 is extremely large, and the medium at this location can easily flush away the blocking particles in the second pressure reducing hole 202, thereby playing a role in unblocking.

[0058] Example 2: The difference between Example 2 and Example 1 is that, as Figure 8 As shown, the sealing elastic element 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. This fixed connection can be welded. The upper opening of the upper baffle tube 33 is fixedly coaxially with the upper ring plate 21, and the lower opening of the lower baffle tube 34 is fixedly coaxially with the lower ring plate 22. The inner wall of the upper baffle tube 33 is attached to the outer wall of the lower baffle tube 34, so that the upper baffle tube 33 and the lower baffle tube 34 slide vertically together. The cooperation between the upper baffle tube 33 and the lower baffle tube plays a sealing role, while 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.

[0059] Compared to the first metal bellows 31 in Embodiment 1, the first spring 32 in this embodiment has a higher compression ratio, which makes the separation range between the upper ring plate 21 and the lower ring plate 22 larger. The longer the second pressure reducing hole 202 is held, the greater the opening and closing distance of the medium channel between the sealing edge 112 and the sealing surface 1011.

[0060] Example 3: The difference between Example 3 and Example 1 is that, as Figure 9 As shown, the sealing elastic element 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 can be welded.

[0061] 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.

[0062] The trough of the second metal bellows 36 and the crest of the third metal bellows 37 elastically abut against each other, and this elastic abutment serves as a sealing function.

[0063] Compared to the first metal bellows 31 in Embodiment 1, the second spring 35 in this embodiment has a higher compression ratio, which makes the separation range between the upper ring plate 21 and the lower ring plate 22 larger. The longer the second pressure reducing hole 202 is held, the greater the opening and closing distance of the medium channel between the sealing edge 112 and the sealing surface 1011.

[0064] Meanwhile, under the elastic force of the second spring 35, the upper ring plate 21 and the lower ring plate 22 remain separated and move away from each other, so that the trough of the second metal bellows 36 and the crest of the third metal bellows 37 repeatedly elastically abut and elastically avoid each other. Therefore, the sealing effect is intermittent. However, since 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 Embodiment 2 and is less likely to cause a large amount of leakage.

[0065] Example 4: The difference between Example 4 and Example 1 is that, as Figure 10 , Figure 11 As shown, the sealing elastic element 3 also includes a fourth metal bellows 38. The upper and lower ends of the fourth metal bellows 38 are respectively sealed and welded to the upper ring plate 21 and the lower ring plate 22. The fourth metal bellows 38 is provided with multiple micropores (not shown in the figure). The size of the micropores is smaller than the particle size in the medium. An extrusion cavity 39 is formed between the inner wall of the fourth metal bellows 38 and the outer wall of the sealing elastic element 3.

[0066] When valve disc 1 moves upward to open the valve, the elastic force of the first metal bellows 31 and the fourth metal bellows 38 causes 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 a pure medium.

[0067] When valve disc 1 moves downward, upper ring plate 21 moves downward, and sealing edge 112 and sealing surface 1011 form a medium channel. At this time, the downward pressure of upper ring plate 21 will squeeze out the pure medium in extrusion chamber 39. The pure medium is sprayed out through microholes, thereby taking away the residual particles in the medium channel. The pure medium can also reduce the occurrence of particles re-adhering in the medium channel.

[0068] Example 5: The difference between Example 5 and Example 1 is that, as Figure 12As shown, the first tooth 131 has a first dividing slit 1311 through the tooth tip, which divides the first tooth 131 into two first elastic bodies 1312. The tooth groove of the first tooth 131 has a first deformable groove 1313 located on one side of the tooth root.

[0069] The tip of the second protruding tooth 211 is provided with a second dividing slit 2111, which divides the second protruding tooth 211 into two second elastic bodies 2112. The tooth groove of the second protruding tooth 211 is provided with a second deformable groove 2113 located on one side of the tooth root of the second protruding tooth 211.

[0070] When the upper ring plate 21 and the lower ring plate 22 move toward each other, the two adjacent first elastic bodies 1312 move closer to each other under the pressure of the toothed wall of the second elastic body 2112, and the two adjacent second elastic bodies 2112 move closer to each other under the pressure of the toothed wall of the first elastic body 1312. That is, the size of the first partition 1311 and the second partition 2111 both become smaller, and the size of the second pressure reducing hole 202 becomes smaller.

[0071] 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 size of the first separation slit 1311 and the second separation slit 2111 both increase, and the size of the second pressure reducing hole 202 increases.

[0072] In this way, the elastic deformation of the first elastic body 1312 and the second elastic body 2112 can control the size of the first partition 1311, the second partition 2111 and the second pressure relief hole 202, thereby loosening or crushing the blockage particles at the above-mentioned locations to reduce the interlocking effect of particles of different sizes; and it can also improve the pressure relief effect and the intensity of jet confluence, thereby improving the particle cleaning effect.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A slurry valve with high sealing durability, characterized in that: The valve includes 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) includes, from the outside to the inside, an integrally formed sealing convex ring (11), a first connecting ring (12), a first pressure reducing ring (13), a second connecting ring (14), and a core (15). The sealing ring (11) has a tapered process surface (111), the process surface (111) has a sealing edge (112), the sealing edge (112) and the sealing surface (1011) are in a line seal fit, the outer diameter of the second connecting ring (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 (105), the relative positions of the first pressure reducing ring (13) and the second pressure reducing ring (105) are both convex with a first protruding tooth (131); the upper ring plate (21) and The lower ring plate (22) has a second protruding tooth (211) protruding from opposite positions. The second protruding tooth (211) is used to mesh with the first protruding tooth (131). The gap between the bottom of the tooth groove of the first protruding tooth (131) and the top of the tooth of the second protruding tooth (211), as well as the gap between the top of the tooth of the first protruding tooth (131) and the bottom of the tooth groove of the second protruding tooth (211), are all set as second pressure reducing holes (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 element (3). The sealing elastic element (3) is used to force The upper ring plate (21) and the lower ring plate (22) move vertically apart; the space enclosed by the groove wall of the expansion groove (141) and the inner wall of the sealing elastic element (3) is set as the first pressure reduction space (201); the space enclosed by the outer wall of the sealing elastic element (3), the inner wall of the sealing ring (10), the lower end face of the first connecting ring (12), and the upper end face of the second pressure reduction ring (105) is set as the second pressure reduction space (203); 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 symmetrical center line between the generatrix of the process surface (111) and the generatrix of the sealing surface (1011) is named the confluence line (100). The upper end face of the upper ring plate (21) and the lower end face of the lower ring plate (22) are both conical surfaces. The upper end face of the upper ring plate (21) and the lower end face of the lower ring plate (22) are both convexly constructed with the second protruding tooth (211). The intersection point between the axis of the second pressure reducing hole (202) and the confluence line (100) is located in the second pressure reducing space (203). 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 confluence line (100) as the symmetrical center line.

3. The slurry valve with high sealing durability according to claim 1, characterized in that: The sealing elastic element (3) includes a first metal bellows (31), which is coaxially arranged with the valve disc (1). The inner diameter of the upper and lower ends of the first metal bellows (31) is radially extended with a mating ring (311). The opposing 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 mating ring (311) is in contact with the stepped surface (313). A welded pipe (312) extends vertically from the inner diameter of the mating ring (311), and the pipe openings of the two welded pipes (312) are respectively sealed and welded to the inner diameter 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 (14) has a protruding first protruding ring (142), and the bottom inner edge of the second pressure reducing ring (105) has a protruding second protruding ring (1051). The radial gap between the second protruding ring (1051) and the first protruding ring (142) is set as the first pressure reducing hole (200). The cross-sectional shape 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-detachment groove (1052) is provided at the connection between the second convex ring (1051) and the second pressure reducing ring (105). An anti-detachment rod (1053) is welded and fixed at the inner diameter of the lower ring plate (22). The end of the anti-detachment rod (1053) is vertically and movably connected to the anti-detachment 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 (105), the end of the anti-detachment rod (1053) abuts against the edge of the groove of the anti-detachment groove (1052).

7. The slurry valve with high sealing durability according to claim 1 or 2, characterized in that: The sealing elastic element (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 upper baffle tube (33) and the lower baffle 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 baffle tube (33) is attached to the outer wall of the lower baffle tube (34). The upper baffle tube (33) and the lower baffle tube (34) slide vertically together.

8. The slurry valve with high sealing durability according to claim 2, characterized in that: The sealing elastic element (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 upper end of the second metal bellows (36) is sealed and welded to the upper ring plate (21), and 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) and the crest of the third metal bellows (37) elastically abut against each other.

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

10. The slurry valve with high sealing durability according to claim 1 or 2, characterized in that: The first protruding tooth (131) has a first dividing slit (1311) extending through its tip, dividing the first protruding tooth (131) into two first elastic bodies (1312). The tooth groove of the first protruding tooth (131) has a first deformable groove (1313) located on one side of the tooth root. The second protruding tooth (211) has a second dividing slit (2111) extending through its tip, dividing the second protruding tooth (211) into two second elastic bodies (2112). 11) The tooth groove is provided with a second deformable groove (2113) located on one side of the root of the second protruding tooth (211); when the upper ring plate (21) and the lower ring plate (22) move towards each other, the two adjacent first elastic bodies (1312) are squeezed together by the second elastic body (2112) and the two adjacent second elastic bodies (2112) are squeezed together by the first elastic body (1312), the size of the first partition (1311) and the second partition (2111) both become smaller, and the size of the second pressure reducing hole (202) becomes smaller.

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