CN222163598U - Anti-scouring stop valve - Google Patents
Anti-scouring stop valve Download PDFInfo
- Publication number
- CN222163598U CN222163598U CN202420649079.XU CN202420649079U CN222163598U CN 222163598 U CN222163598 U CN 222163598U CN 202420649079 U CN202420649079 U CN 202420649079U CN 222163598 U CN222163598 U CN 222163598U
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- Prior art keywords
- valve
- sleeve
- sealing
- packing
- pressure reducing
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- 238000009991 scouring Methods 0.000 title claims description 10
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 238000012856 packing Methods 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006837 decompression Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Details Of Valves (AREA)
Abstract
本实用新型公开了一种抗冲刷截止阀，包括阀体、阀杆、阀瓣以及阀座，阀体内依次设有相连的进口通道、中腔以及出口通道，阀体上部设有与中腔相连通的轴孔，阀杆贯穿轴孔并伸入中腔中，阀瓣设置在阀杆内端，阀座安装于中腔与出口通道的交界处；还包括有由上至下依次套设在阀杆外周的填料压板、填料压套、密封填料、填料垫以及套筒，填料压板通过螺栓与阀体连接在一起，密封填料、填料垫设置于轴孔内，套筒设置在中腔中，并且套筒下端与阀座上端相抵紧，阀瓣的外周与套筒的内周相贴合，套筒侧部贯通设置有多个过口。本实用新型通过减小介质到达阀座密封面时的流速，来提升阀瓣与阀座两者密封面的抗冲刷能力，从而延长阀门的使用寿命。
The utility model discloses an anti-scour stop valve, including a valve body, a valve stem, a valve disc and a valve seat, wherein the valve body is provided with an inlet channel, a middle cavity and an outlet channel connected in sequence, an axial hole connected to the middle cavity is provided on the upper part of the valve body, the valve stem passes through the axial hole and extends into the middle cavity, the valve disc is arranged at the inner end of the valve stem, and the valve seat is installed at the junction of the middle cavity and the outlet channel; it also includes a packing pressure plate, a packing pressure sleeve, a sealing packing, a packing pad and a sleeve which are sequentially sleeved on the outer periphery of the valve stem from top to bottom, the packing pressure plate is connected to the valve body by bolts, the sealing packing and the packing pad are arranged in the axial hole, the sleeve is arranged in the middle cavity, and the lower end of the sleeve is tightly abutted against the upper end of the valve seat, the outer periphery of the valve disc is fitted with the inner periphery of the sleeve, and a plurality of through-ports are arranged on the side of the sleeve. The utility model improves the anti-scour ability of the sealing surfaces of the valve disc and the valve seat by reducing the flow velocity when the medium reaches the sealing surface of the valve seat, thereby extending the service life of the valve.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a scour prevention stop valve.
Background
The stop valve is also called a stop valve, belongs to one of the most widely used valves, and is popular because of small friction force between sealing surfaces in the opening and closing process, durability, small opening height, easy manufacture and convenient maintenance, and is suitable for medium and low pressure as well as high pressure.
In the prior stop valve, at the moment of opening or closing the valve, as the gap between sealing surfaces is small, the medium flow speed is high, the pressure difference is large, particles in the medium can greatly scour and cavitation the sealing surfaces, the sealing pair is easily caused to be closed incompletely, so that leakage is caused, and the pipeline system equipment is greatly influenced.
Disclosure of utility model
The utility model aims to provide a scour prevention stop valve, which improves the scour prevention capability of sealing surfaces of a valve clack and a valve seat by reducing the flow rate of a medium when the medium reaches the sealing surface of the valve seat, thereby prolonging the service life of the valve.
The utility model provides a technical scheme that the anti-scouring stop valve comprises a valve body, a valve rod, a valve clack and a valve seat, wherein an inlet channel, a middle cavity and an outlet channel which are connected are sequentially arranged in the valve body, a shaft hole communicated with the middle cavity is formed in the upper part of the valve body, the valve rod penetrates through the shaft hole and stretches into the middle cavity, the valve clack is arranged at the inner end of the valve rod, the valve seat is arranged at the junction of the middle cavity and the outlet channel and is used for being in sealing fit with the valve clack when the valve is closed, the anti-scouring stop valve further comprises a packing pressing plate, a packing pressing sleeve, a packing, a packing pad and a sleeve which are sequentially sleeved on the periphery of the valve rod from top to bottom, the packing pressing plate is connected with the valve body through bolts, the packing and the packing pad are arranged in the shaft hole, the sleeve is arranged in the middle cavity, the lower end of the sleeve is abutted against the upper end of the valve seat, the periphery of the valve clack is attached to the inner periphery of the sleeve, and a plurality of through openings are formed in the side of the sleeve.
Through adopting above-mentioned technical scheme, through set up the sleeve that has a plurality of mouths in the well intracavity to increase the resistance that the medium flows through the sleeve, thereby reduce the velocity of flow when the medium reaches the sealed face of disk seat, promote the anti-scour ability of valve clack and the sealed face of disk seat both, thereby extension valve's life.
The utility model is further characterized in that a plurality of pressure stabilizing holes are formed in the side part of the sleeve in a penetrating manner at the position close to the upper end.
Through adopting above-mentioned technical scheme, set up the steady voltage hole on the sleeve, can maintain the inside and outside pressure balance of sleeve, make the valve rod drive the valve clack motion more smooth and easy.
The utility model is further characterized in that the upper end of the sleeve is provided with a limiting flange which extends towards the inner circumference and is used for limiting the upper stroke of the valve clack.
Through adopting above-mentioned technical scheme, can carry out the upstroke to the valve rod spacing, guarantee the accuracy of its start and stop position.
The utility model is further characterized in that the bottom of the valve seat is provided with a sealing groove, and a sealing ring used for forming sealing fit with the inner wall of the valve body is embedded in the sealing groove.
By adopting the technical scheme, the tightness between the valve seat and the inner wall of the valve body can be ensured after the valve seat is installed, and medium leakage from a gap between the valve seat and the inner wall of the valve body is avoided.
The utility model is further characterized in that the inner side of the sleeve is also provided with a mounting groove extending to the bottom end, a decompression barrel is embedded in the mounting groove, the decompression barrel is pressed on the valve seat by the sleeve corresponding to the upper end of the mounting groove, an annular concave part is arranged on the outer side of the decompression barrel, an annular cavity is formed between the annular concave part and the sleeve, and a plurality of decompression holes distributed in a circumferential array are arranged in a penetrating manner at the position of the decompression barrel corresponding to the annular concave part.
By adopting the technical scheme, the two-stage decompression structure is arranged, the decompression effect is improved, the turbulent state of the medium is improved, and the anti-scouring capability of the sealing surfaces of the valve clack and the valve seat is further improved.
The valve clack is of a hollow structure with an opening at the upper end, a limiting ring is arranged at the opening at the upper end of the valve clack, a flow-through cavity is formed in the valve clack, the valve rod penetrates through the limiting ring and stretches into the flow-through cavity, one end of the valve rod corresponding to the flow-through cavity is provided with a sealing part with the outer diameter larger than that of the valve rod, the outer diameter of the sealing part is smaller than the inner diameter of the flow-through cavity, a plurality of first decompression channels for communicating the decompression holes with the flow-through cavity are arranged on the side part of the valve clack, and a plurality of second decompression channels for communicating the outer part of the valve clack with the flow-through cavity are arranged at the bottom of the valve clack.
By adopting the technical scheme, pressure relief can be carried out at the moment of valve opening, so that the valve opening resistance is reduced, and the noise generated by medium impact is obviously weakened.
The utility model is further arranged such that the lower end face of the seal is dome-shaped.
By adopting the technical scheme, when the valve is closed, the sealing part can be better matched with the second pressure reducing channel on the valve clack.
The utility model further provides that the limiting ring is connected to the upper part of the valve clack in a threaded manner.
By adopting the technical scheme, the mounting structure is simple and reliable, and the dismounting is very convenient.
Drawings
FIG. 1 is a schematic overall structure of embodiment 1;
FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;
FIG. 3 is a schematic overall structure of embodiment 2;
fig. 4 is an enlarged schematic view of the portion B in fig. 2.
1, A valve body, 2, a valve rod, 3, a valve clack, 4, a valve seat, 5, an inlet channel, 6, a middle cavity, 7, an outlet channel, 8, a shaft hole, 9, a packing pressing plate, 10, a packing pressing sleeve, 11, a sealing packing, 12, a packing pad, 13, a sleeve, 14, a through hole, 15, a pressure stabilizing hole, 16, a limiting flange, 17, a sealing groove, 18, a sealing ring, 19, a mounting groove, 20, a pressure reducing cylinder, 21, an annular concave part, 22, an annular cavity, 23, a pressure reducing hole, 24, a limiting ring, 25, an overflow cavity, 26, a sealing part, 27, a first pressure reducing channel, 28 and a second pressure reducing channel.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment 1. A scour prevention stop valve as shown in the accompanying drawings 1 and 2 comprises a valve body 1, a valve rod 2, a valve clack 3 and a valve seat 4, wherein an inlet channel 5, a middle cavity 6 and an outlet channel 7 which are connected are sequentially arranged in the valve body 1, the upper part of the valve body 1 is provided with a shaft hole 8 communicated with the middle cavity 6, the valve rod 2 penetrates through the shaft hole 8 and stretches into the middle cavity 6, the valve clack 3 is arranged at the inner end of the valve rod 2, the valve seat 4 is arranged at the junction of the middle cavity 6 and the outlet channel 7 and is used for forming sealing fit with the valve clack 3 when the valve is closed, the scour prevention stop valve further comprises a packing pressing plate 9, a packing pressing sleeve 10, a packing 11, a packing pad 12 and a sleeve 13 which are sequentially sleeved on the periphery of the valve rod 2 from top to bottom, the packing pressing plate 9 is connected with the valve body 1 through bolts, the packing 11 and the packing pad 12 are arranged in the shaft hole 8, the sleeve 13 is arranged in the middle cavity 6, the lower end of the sleeve 13 is abutted against the upper end of the valve seat 4, the periphery of the valve clack 3 is attached to the inner periphery of the sleeve 13, and a plurality of ports 14 are arranged on the side of the sleeve. The sleeve 13 with a plurality of through openings 14 is arranged in the middle cavity 6, so that the resistance of medium flowing through the sleeve 13 is increased, the flow rate of the medium reaching the sealing surface of the valve seat 4 is reduced, the anti-scouring capability of the sealing surfaces of the valve clack 3 and the valve seat 4 is improved, and the service life of the valve is prolonged.
As shown in fig. 2, a plurality of pressure stabilizing holes 15 are provided through the side of the sleeve 13 near the upper end. The sleeve 13 is provided with the pressure stabilizing hole 15, so that the balance of the internal pressure and the external pressure of the sleeve 13 can be maintained, and the valve rod 2 drives the valve clack 3 to move more smoothly.
As shown in fig. 2, the upper end of the sleeve 13 is provided with a limit flange 16 extending towards the inner circumference for limiting the upper stroke of the valve clack 3, and the limit flange 16 and the sleeve 13 are of an integral structure. The design can limit the upper stroke of the valve rod 2, and ensure the accuracy of the opening and closing positions of the valve rod 2.
As shown in fig. 2, a sealing groove 17 is formed in the bottom of the valve seat 4, and a sealing ring 18 used for forming sealing fit with the inner wall of the valve body 1 is embedded in the sealing groove 17. The design can ensure the tightness between the valve seat 4 and the inner wall of the valve body 1 after the valve seat 4 is installed, and avoid the leakage of the medium from the gap between the valve seat 4 and the inner wall of the valve body 1.
In the embodiment 2, as shown in fig. 3 and fig. 4, in the embodiment, a mounting groove 19 extending to the bottom end is further provided on the inner side of the sleeve 13, a pressure reducing cylinder 20 is embedded in the mounting groove 19, the shape of the mounting groove 19 is matched with that of the pressure reducing cylinder 20, the pressure reducing cylinder 20 is pressed on the valve seat 4 by the position of the sleeve 13 corresponding to the upper end of the mounting groove 19, an annular concave portion 21 is provided on the outer side of the pressure reducing cylinder 20, an annular cavity 22 is formed between the annular concave portion 21 and the sleeve 13, and a plurality of pressure reducing holes 23 distributed in a circumferential array are arranged through the position of the pressure reducing cylinder 20 corresponding to the annular concave portion 21. The two-stage decompression structure is arranged, so that the decompression effect is improved, the turbulent flow state of a medium is improved, and the anti-scouring capability of sealing surfaces of the valve clack 3 and the valve seat 4 is further improved.
Further, as shown in fig. 4, the valve clack 3 is in a hollow structure with an open upper end, a limiting ring 24 is disposed at the opening of the upper end of the valve clack 3, so that an overflow cavity 25 is formed inside the valve clack 3, the valve rod 2 passes through the limiting ring 24 and extends into the overflow cavity 25, a sealing portion 26 with an outer diameter larger than that of the valve rod 2 is disposed at one end of the valve rod 2 corresponding to the inside of the overflow cavity 25, the outer diameter of the sealing portion 26 is smaller than the inner diameter of the overflow cavity 25, the height of the overflow cavity 25 is larger than that of the sealing portion 26, the sealing portion 26 can axially displace in the sealing cavity, a plurality of first pressure reducing channels 27 (the first pressure reducing channels 27 are formed by an external annular channel and a plurality of through holes disposed inside, the plurality of through holes are communicated with the annular channel), and a plurality of second pressure reducing channels 28 for communicating the outside of the valve clack 3 with the overflow cavity 25 are disposed at the bottom of the valve clack 3. The pressure release can be carried out at the moment of opening the valve, so that the opening resistance of the valve is reduced, and the noise generated by medium impact is obviously reduced.
As shown in fig. 4, the lower end surface of the sealing portion 26 has a dome shape. So that the sealing 26 can better cooperate with the second relief channel 28 on the flap 3 when the valve is closed.
As shown in fig. 4, the limit ring 24 is screwed on the upper part of the valve clack 3, that is, the upper part of the valve clack 3 is provided with an internal thread, and the periphery of the limit ring 24 is provided with an external thread matched with the internal thread. The installation structure is simple and reliable, and the disassembly and the assembly are very convenient.
Claims (8)
1. A scour prevention stop valve comprises a valve body (1), a valve rod (2), a valve clack (3) and a valve seat (4), wherein an inlet channel (5), a middle cavity (6) and an outlet channel (7) which are connected are sequentially arranged in the valve body (1), an axle hole (8) communicated with the middle cavity (6) is arranged at the upper part of the valve body (1), the valve rod (2) penetrates through the axle hole (8) and stretches into the middle cavity (6), the valve clack (3) is arranged at the inner end of the valve rod (2), the valve seat (4) is arranged at the junction of the middle cavity (6) and the outlet channel (7) and is used for forming sealing fit with the valve clack (3) when the valve is closed, and the scour prevention stop valve is characterized by further comprising a packing pressing plate (9), a packing pressing sleeve (10), a packing (11), a packing pad (12) and a sleeve (13) which are sequentially sleeved on the periphery of the valve rod (2), wherein the packing pressing plate (9) is connected with the valve body (1) through bolts, the packing pressing plate (11) and the packing pad (12) are arranged in the axle hole (8) and tightly abutted against the outer periphery of the valve seat (13) at the inner periphery of the valve seat (3), a plurality of through openings (14) are formed in the side portion of the sleeve (13) in a penetrating mode.
2. A scour prevention stop valve according to claim 1, wherein a plurality of pressure stabilizing holes (15) are provided through the side of the sleeve (13) near the upper end.
3. A scour prevention stop valve according to claim 1, wherein the upper end of the sleeve (13) is provided with a limiting flange (16) extending inward for limiting the upward stroke of the valve flap (3).
4. The anti-scouring stop valve according to claim 1 is characterized in that a sealing groove (17) is formed in the bottom of the valve seat (4), and a sealing ring (18) used for being in sealing fit with the inner wall of the valve body (1) is embedded in the sealing groove (17).
5. The anti-scouring stop valve according to claim 1, wherein the inner side of the sleeve (13) is further provided with a mounting groove (19) extending to the bottom end, a pressure reducing cylinder (20) is embedded in the mounting groove (19), the pressure reducing cylinder (20) is pressed on the valve seat (4) by the sleeve (13) corresponding to the upper end of the mounting groove (19), an annular concave part (21) is arranged on the outer side of the pressure reducing cylinder (20), an annular cavity (22) is formed between the annular concave part (21) and the sleeve (13), and a plurality of pressure reducing holes (23) distributed in a circumferential array are arranged in a penetrating mode at the position of the pressure reducing cylinder (20) corresponding to the annular concave part (21).
6. The anti-scouring stop valve according to claim 5, wherein the valve clack (3) is of a hollow structure with an open upper end, a limiting ring (24) is arranged at the opening of the upper end of the valve clack (3) so that an overflow cavity (25) is formed inside the valve clack (3), the valve rod (2) penetrates through the limiting ring (24) and stretches into the overflow cavity (25), one end of the valve rod (2) corresponding to the overflow cavity (25) is provided with a sealing part (26) with the outer diameter larger than that of the valve rod (2), the outer diameter of the sealing part (26) is smaller than the inner diameter of the overflow cavity (25), the side part of the valve clack (3) is provided with a plurality of first pressure reducing channels (27) used for communicating the pressure reducing holes (23) with the overflow cavity (25), and the bottom of the valve clack (3) is provided with a plurality of second pressure reducing channels (28) used for communicating the outer part of the valve clack (3) with the overflow cavity (25).
7. A scour prevention shutoff valve according to claim 6, wherein a lower end surface of said seal portion (26) has a dome shape.
8. A scour protection shut-off valve according to claim 7, characterized in that the stop ring (24) is screwed to the upper part of the valve flap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420649079.XU CN222163598U (en) | 2024-03-30 | 2024-03-30 | Anti-scouring stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420649079.XU CN222163598U (en) | 2024-03-30 | 2024-03-30 | Anti-scouring stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222163598U true CN222163598U (en) | 2024-12-13 |
Family
ID=93785415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420649079.XU Active CN222163598U (en) | 2024-03-30 | 2024-03-30 | Anti-scouring stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222163598U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120667545A (en) * | 2025-08-22 | 2025-09-19 | 上正阀门集团有限公司 | High-pressure-difference anti-scouring low-noise stop valve |
-
2024
- 2024-03-30 CN CN202420649079.XU patent/CN222163598U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120667545A (en) * | 2025-08-22 | 2025-09-19 | 上正阀门集团有限公司 | High-pressure-difference anti-scouring low-noise stop valve |
| CN120667545B (en) * | 2025-08-22 | 2025-11-25 | 上正阀门集团有限公司 | High-pressure-difference anti-scouring low-noise stop valve |
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