CN118049532A - Piston type flow regulating and pressure regulating valve - Google Patents
Piston type flow regulating and pressure regulating valve Download PDFInfo
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- CN118049532A CN118049532A CN202410451565.5A CN202410451565A CN118049532A CN 118049532 A CN118049532 A CN 118049532A CN 202410451565 A CN202410451565 A CN 202410451565A CN 118049532 A CN118049532 A CN 118049532A
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- regulating valve
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 2
- 239000012530 fluid Substances 0.000 abstract description 20
- 230000006378 damage Effects 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The invention provides a piston type flow regulating and pressure regulating valve, which belongs to the technical field of valves and comprises a valve body provided with an inner cavity and a flow guiding component, wherein one side of the inner cavity is opened, and a cylindrical piston piece is arranged at the opening; a limiting and stabilizing component is arranged in the inner cavity, and comprises a first limiting piece and a second limiting piece; the guide assembly comprises a first guide piece arranged at the reducing part of the valve body and a second guide piece connected to the piston piece, wherein the first guide piece comprises a ring seat provided with a plurality of annular guide surfaces, and the annular guide surfaces are distributed in a step shape along the direction of water flow. This piston formula is transferred and is flowed air-vent valve through spacing firm subassembly and water conservancy diversion subassembly's combined action, has effectively improved the stability of piston work, and through the water conservancy diversion to the fluid, abundant with cavitation control in the center department of runner, avoid it to cause vibration and cavitation destruction of pipeline or valve body, whole effective improvement valve work's reliability, and be convenient for assemble.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a piston type flow regulating and pressure regulating valve.
Background
A piston-type flow regulating and pressure regulating valve is a common industrial valve that regulates the flow of fluid and the pressure in a pipe by the reciprocating movement of a piston.
The current piston type flow regulating pressure regulating valve is easy to swing when the piston is impacted by fluid to influence the working stability of the piston in the working process, even when the swing amplitude is overlarge, the situation that the piston is difficult to move due to blocking can occur, and cavitation generated by the fluid in the reducing and direction changing process can cause vibration and cavitation damage of a pipeline or a valve body, so that the working reliability of the pressure regulating valve can be seriously reduced, the running reliability of a pipeline system can be correspondingly influenced, and the effective control and management of the fluid are not facilitated.
Disclosure of Invention
The invention provides a piston type flow regulating and pressure regulating valve, which aims to solve the problems that in the related art, the working of a piston is unstable, cavitation acts on a pipeline or a valve body, and the working reliability of the valve is reduced.
The invention provides a piston type flow regulating and pressure regulating valve which comprises a valve body provided with an inner cavity and a flow guiding component, wherein one side of the inner cavity is opened, and a cylindrical piston piece is arranged at the opening; the piston part reciprocates along the limiting channel, and the limiting part II comprises a limiting track and a limiting sliding block which moves along the limiting track and is connected to the piston part.
The flow guiding assembly comprises a first flow guiding piece arranged at the variable diameter position of the valve body and a second flow guiding piece connected to the piston piece, wherein the first flow guiding piece comprises a ring seat provided with a plurality of annular flow guiding surfaces, and the annular flow guiding surfaces are distributed in a step shape along the direction of water flow; and the gradient of annular guide surface increases gradually along the direction of level, is favorable to improving the roughness of rivers, and the second water conservancy diversion spare includes go-between, guide post and guide post two, and the go-between is in the same place piston spare and guide post one in proper order, guide post one and guide post two, and guide post one and guide post two all along the circumference evenly distributed of go-between, and the guide surface of guide post one is middle indent, both sides arc is protruding outward, and guide post two keep away from the one end of go-between inwards bending.
In one possible implementation manner, the limiting and stabilizing component comprises an ear seat fixedly arranged in the inner cavity, the ear seat is symmetrically arranged, the first limiting part and the limiting rail are fixedly connected to the ear seat, and the limiting sliding block is of a strip-shaped structure.
In one possible implementation manner, the limiting sliding blocks are symmetrically arranged, concave assembly ports are formed in the limiting sliding blocks, and connecting beams are arranged in the middle of the symmetrical limiting sliding blocks.
In one possible implementation manner, a limiting component is arranged in the valve body, the limiting component comprises a fixed ring, a plurality of limiting blocks are arranged on the inner face of the fixed ring, the limiting blocks are in one-to-one correspondence with the flow guiding columns, and the limiting faces of the limiting blocks are matched with the flow guiding faces of the first flow guiding columns and limit the first flow guiding columns in the radial direction, so that the first flow guiding columns can only move in the axial direction.
In one possible implementation manner, elastic pads are arranged on two sides of the fixing ring, and the fixing ring limits the connecting ring.
In one possible embodiment, the first and second flow guiding columns are alternately staggered in sequence in the circumferential direction of the connecting ring.
In one possible implementation manner, an annular filter cover is arranged at the opening of the inner chamber, and the outer side of the filter cover is of an arc-shaped structure.
The above technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. according to the piston type flow regulating and pressure regulating valve provided by the embodiment of the invention, the working stability of the piston part is effectively improved through the combined action of the limiting and stabilizing component and the flow guiding component, and cavitation is fully controlled at the center of the flow channel through the flow guiding of fluid, so that vibration and cavitation damage of a pipeline or a valve body are avoided, the working reliability of the valve is integrally and effectively improved, and the valve is convenient to assemble.
2. According to the piston type flow regulating and pressure regulating valve provided by the embodiment of the invention, the fluid at the variable-diameter and variable-direction position of the valve body is guided through the cooperation of the first guide piece and the second guide piece, so that cavitation is sufficiently controlled at the center of the flow channel, vibration and cavitation damage of a pipeline or the valve body are avoided, and the first guide piece is arranged at the variable-diameter position of the valve body, which is close to the piston piece, so that the damage of water flow impact to the valve body can be effectively avoided.
3. According to the piston type flow regulating pressure regulating valve provided by the embodiment of the invention, the first limiting part and the second limiting part respectively limit the piston part from the circumferential direction and the center, and meanwhile, the second limiting part also limits the connecting rod part, so that the moving stability of the piston part is improved, the influence of water flow impact on the piston part is reduced, the working reliability of the valve is improved, the assembly is convenient, the assembly precision is improved, and the working reliability of the pressure regulating valve is further improved.
4. According to the piston type flow regulating and pressure regulating valve provided by the embodiment of the invention, the inclination of the annular flow guiding surface is gradually increased along the horizontal direction, and the fluid is guided in a progressive manner, so that the smoothness of the fluid flow is improved, and the cavitation degree is correspondingly reduced.
5. According to the piston type flow regulating and pressure regulating valve provided by the embodiment of the invention, the first flow guiding column is limited by the limiting component, so that the stability of the first flow guiding column in reciprocating movement and the stability of the piston piece in reciprocating movement are improved, meanwhile, the connecting ring is limited and buffered to a certain extent, and when the valve is closed, secondary sealing is formed, the sealing performance of the piston piece is improved, and the working reliability of the valve is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a valve body of a piston type flow regulating and pressure regulating valve according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of an inner chamber, a valve body and a first flow guiding member of a piston type flow regulating and pressure regulating valve according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cross-sectional view of a piston member of a piston-type flow regulating and pressure regulating valve according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a first flow guiding member and a second flow guiding member of a piston type flow regulating and pressure regulating valve according to an embodiment of the present invention.
Fig. 5 is a schematic flow direction diagram of fluid flowing through a first flow guiding member of a piston type flow regulating and pressure regulating valve according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a limit assembly of a piston-type flow regulating and pressure regulating valve according to an embodiment of the present invention.
In the figure: 1. an inner chamber; 2. a valve body; 3. a piston member; 4. a limit stabilizing component; 41. a first limiting piece; 42. a second limiting piece; 421. a limit rail; 422. a limit sliding block; 423. an assembly port; 424. a connecting beam; 43. a limiting channel; 44. an ear seat; 45. an axial diversion trench; 5. a flow guiding assembly; 51. a first flow guide; 511. an annular guide surface; 512. a ring seat; 52. a second flow guide; 521. a connecting ring; 522. a first flow guiding column; 523. a second flow guiding column; 6. a limit component; 61. a fixing ring; 62. a limiting block; 63. an elastic pad; 7. a filter cover; 8. an inflow port; 9. an outflow port; 10. a flow passage; 11. a seal; 12. a crank link drive assembly; 121. a crank member; 122. a drive shaft; 123. a link member.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described below and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1, fig. 2 and fig. 3, a piston type flow regulating and regulating valve comprises a valve body 2 provided with an inner chamber 1, a limit stabilizing assembly 4 and a flow guiding assembly 5, wherein the left end of the valve body 2 is an inflow port 8, the right end of the valve body is an outflow port 9, the inflow port 8 and the outflow port 9 are all in sealing connection with a pipeline, an opening is formed on the right side of the inner chamber 1, a cylindrical piston member 3 is arranged at the opening, as shown in fig. 2, a flow passage 10 for fluid flow to pass through is reserved between the inner chamber 1 and the valve body 2, sealing elements 11 are arranged at the outflow port 9 of the valve body 2 and the opening on the right side of the inner chamber 1, the sealing elements 11 are used for being in sealing connection with a piston member 3 when the pressure regulating valve is closed, the opening and closing of the pressure regulating valve and the flow regulating valve are controlled through the left and right movement of the piston member 3, and the left and right movement of the piston member 3 are controlled through a crank connecting rod driving assembly 12, as shown in fig. 3, the crank connecting rod driving assembly 12 comprises a driving shaft 122 fixedly connected with the crank member 121, the driving shaft 122 is rotatably connected to the inner chamber 1, one end of the driving shaft 122 is outwards extended to the outer driving source (such as a motor) of the valve body 2, the sealing element 11 is arranged at the position of the opening and the opening is provided with the opening and the opening of the piston member 2, the piston member 123 is rotatably connected with the piston member 3, the piston member 3 is rotatably and the piston member 3 is rotatably controlled by the piston member 3 through the left and the piston member 3, and the piston member 3 is rotatably and the piston member 3 is 3.
Referring to fig. 2 and 3, the limiting and stabilizing component 4 is disposed in the inner chamber 1, and the limiting and stabilizing component 4 includes a first limiting member 41 and a second limiting member 42, where the first limiting member 41 is in an annular structure and is fixedly disposed in the inner chamber 1 to form an annular limiting channel 43, the piston member 3 moves along the limiting channel 43, and the limiting channel 43 limits the piston member 3, so that the stability of the reciprocating movement of the piston member 3 can be effectively improved, and axial diversion grooves 45 are disposed on the outer peripheral surface of the first limiting member 41, and the axial diversion grooves 45 are uniformly distributed along the circumferential direction of the first limiting member 41 to provide a flowing space for fluid.
Referring to fig. 2 and 3, the second limiting member 42 includes a limiting rail 421 fixedly disposed in the inner chamber 1 and a limiting slider 422 moving along the limiting rail 421 and connected to the piston member 3, a connecting beam 424 is disposed between the limiting sliders 422 symmetrically disposed front and back and symmetrically disposed front and back, the connecting beam 123 controls the piston member 3 to reciprocate through hinging with the connecting beam 424, the connecting beam 424 is fixedly connected in the piston member 3 and is fixedly connected with the limiting slider 422, when the limiting slider 422 slides along the limiting rail 421, the limiting slider 422 limits the piston member 3 from the center through the connecting beam 424, so as to improve the stability of the reciprocating movement of the piston member 3, and meanwhile, the symmetrical limiting slider 422 limits the connecting rod member 123, so as to further improve the stability of the hinging movement of the connecting rod member 123, further facilitate the improvement of the reciprocating movement stability of the piston member 3, and the assembling hole 423 is disposed on the opposite surface of the limiting slider 422, the connecting rod member 123 and the connecting beam 424 are assembled and connected, thereby not only facilitating the assembling, but also facilitating the improvement of the assembling precision, further improving the reliability of the pressure regulating valve, wherein the lug 421 is further comprises a lug 421 and a limiting seat 421, and a limiting seat 44, which is disposed on the limiting seat 44, and the limiting seat 44 is fully fixed on the limiting seat 44, and the limiting seat 2 is fixed on the limiting seat 44.
Referring to fig. 2, 4, 5 and 6, the flow guiding assembly 5 includes a first flow guiding member 51 disposed at the flow outlet 9 of the valve body 2 and a second flow guiding member 52 connected to the piston member 3, the first flow guiding member 51 includes a ring seat 512 provided with a plurality of annular flow guiding surfaces 511, the annular flow guiding surfaces 511 are distributed in a stepped manner along the direction of water flow, the inclination of the annular flow guiding surfaces 511 increases gradually along the horizontal direction, the second flow guiding member 52 includes a connecting ring 521, a first flow guiding post 522 and a second flow guiding post 523, the connecting ring 521 sequentially connects the piston member 3 with the first flow guiding post 522, the first flow guiding post 522 and the second flow guiding post 523 together, the first flow guiding post 522 and the second flow guiding post 523 are uniformly distributed along the circumferential direction of the connecting ring 521, the first flow guiding post 522 and the second flow guiding post 523 are alternately distributed along the circumferential direction of the connecting ring 521, the first flow guiding surface 522 is concave in the middle, the two sides are convex outwards, and one end of the second flow guiding post 523 away from the connecting ring 521 is bent inwards; as shown in fig. 5, the annular flow guiding surface 511 distributed in a stepped manner guides the fluid at the reducing position of the valve body 2 close to the piston member 3, so that on one hand, the damage of the water flow impact to the valve body 2 is effectively avoided, on the other hand, the fluid is guided gradually, as shown in fig. 5, the fluid flows to the second flow guiding member 52 along the radial direction of the connecting ring 521 through the guiding of the fluid, at this moment, the fluid firstly passes through the first flow guiding column 522, is sprayed to the center of the flow channel 10 under the guiding of the first flow guiding column 522, and further, the cavitation is effectively controlled at the center of the flow channel 10, so that the vibration and the cavitation damage of the pipeline or the valve body 2 are avoided, the middle concave and the two side arc-shaped outer convex flow guiding surfaces play a certain buffering flow guiding role, the smoothness of the fluid is improved to a certain extent, at this moment, the fluid is guided through the second flow guiding column 523, the fluid flows to the center again, the cavitation is effectively controlled at the center of the flow channel 10, in summary, the cooperation of the first flow guiding member 51 and the second flow guiding member 52 is effectively controlled at the center of the flow channel 10, the center of the cavitation is effectively controlled at the position of the valve body 2, and the corresponding vibration and the position of the valve body is prevented from being damaged, and the vibration and the corresponding vibration stability is avoided, the vibration and the valve body is controlled, and the vibration is avoided.
Referring to fig. 2 and 6, the valve body 2 is further provided with a limiting assembly 6, the limiting assembly 6 includes a fixed ring 61, the fixed ring 61 is installed at the outflow opening 9 of the valve body 2, a plurality of limiting blocks 62 are disposed on the inner surface of the fixed ring 61, the limiting blocks 62 are in one-to-one correspondence with the first guide posts 522, and the limiting surfaces of the limiting blocks 62 are matched with the guiding surfaces of the first guide posts 522 and limit the first guide posts 522 in the radial direction, as shown in fig. 6, the limiting blocks 62 limit the first guide posts 522 in the radial direction, so that the first guide posts 522 can only move in the axial direction, which is beneficial to improving the stability of the reciprocating movement of the first guide posts 522, and improving the stability of the reciprocating movement of the piston member 3, and further beneficial to improving the reliability of the operation of the pressure regulating valve, wherein, the left and right sides of the fixed ring 61 are respectively provided with elastic pads 63, the elastic pads 63 are annular rubber pads, as shown in fig. 6, in the process of the reciprocating movement of the piston member 3, when the piston member 3 moves to the maximum stroke, the elastic pads 63 on the right side of the fixed ring 61 limit the first guide posts 522 and the connecting ring 522 in the radial direction, and the connecting rings 522 move in the radial direction, and the axial direction, so that the connecting rings 521 can also move in the axial direction, and the corresponding to the sealing ring 521 can be sealed when the corresponding to the piston member 3 is in the sealing state, and the sealing state, and the reliability of the sealing ring is improved.
Referring to fig. 2 and 5, an annular filter cover 7 is disposed at the opening of the inner chamber 1, and the outer side of the filter cover 7 is in an arc-shaped structure, as shown in fig. 5, the filter cover 7 is used for protecting the connection area between the inner chamber 1 and the piston member 3, so that the influence of the accumulation of impurities on the smoothness and stability of the reciprocating sliding of the piston member 3 is avoided.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or slidably connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle according to the present invention should be covered in the protection scope of the present invention.
Claims (9)
1. A piston type flow regulating and pressure regulating valve, which is characterized in that: the valve comprises a valve body (2) provided with an inner chamber (1), wherein one side of the inner chamber (1) is opened, and a cylindrical piston member (3) is arranged at the opening;
The inner chamber (1) is internally provided with a limiting and stabilizing component (4), the limiting and stabilizing component (4) comprises a first limiting component (41) and a second limiting component (42), the first limiting component (41) is of an annular structure and forms an annular limiting channel (43) with the inner chamber (1), the piston piece (3) moves back and forth along the limiting channel (43), and the second limiting component (42) comprises a limiting track (421) and a limiting sliding block (422) which moves along the limiting track (421) and is connected to the piston piece (3);
The flow guiding assembly (5), the flow guiding assembly (5) comprises a first flow guiding piece (51) arranged at the variable diameter position of the valve body (2) and a second flow guiding piece (52) connected to the piston piece (3), the first flow guiding piece (51) comprises a ring seat (512) provided with a plurality of ring-shaped flow guiding surfaces (511), and the ring-shaped flow guiding surfaces (511) are distributed in a step shape along the direction of water flow; the second flow guide piece (52) comprises a connecting ring (521), a first flow guide column (522) and a second flow guide column (523), the connecting ring (521) sequentially connects the piston piece (3) with the first flow guide column (522), the first flow guide column (522) with the second flow guide column (523), the first flow guide column (522) and the second flow guide column (523) are uniformly distributed along the circumference of the connecting ring (521), the flow guide surface of the first flow guide column (522) is concave in the middle and convex outwards in the arc shape at the two sides, and one end of the second flow guide column (523) far away from the connecting ring (521) is bent inwards.
2. The piston type flow regulating valve according to claim 1, wherein: the limiting and stabilizing assembly (4) comprises an ear seat (44) fixedly arranged in the inner cavity (1), the ear seat (44) is symmetrically arranged, a first limiting part (41) and a limiting track (421) are fixedly connected to the ear seat (44), and the limiting sliding block (422) is of a strip-shaped structure.
3. A piston type flow regulating valve according to claim 1 or 2, wherein: limiting slide blocks (422) are symmetrically arranged, concave assembly ports (423) are formed in the limiting slide blocks (422), and connecting beams (424) are arranged in the middle of the symmetrical limiting slide blocks (422).
4. The piston type flow regulating valve according to claim 1, wherein: be provided with spacing subassembly (6) in valve body (2), spacing subassembly (6) are including solid fixed ring (61), are provided with a plurality of stopper (62) on the inner face of solid fixed ring (61), stopper (62) and water conservancy diversion post one (522) one-to-one and the spacing face of stopper (62) cooperate with the water conservancy diversion face of water conservancy diversion post one (522) and carry out spacingly to water conservancy diversion post one (522) in radial, make water conservancy diversion post one (522) only can be in axial direction removal.
5. The piston type flow regulating valve according to claim 4, wherein: elastic pads (63) are arranged on two sides of the fixing ring (61), and the fixing ring (61) limits the connecting ring (521).
6. The piston type flow regulating valve according to claim 1, wherein: the inclination of the annular guide surface (511) gradually increases along the horizontal direction.
7. The piston type flow regulating valve according to claim 1, wherein: the first guide posts (522) and the second guide posts (523) are alternately staggered in turn in the circumferential direction of the connecting ring (521).
8. The piston type flow regulating valve according to claim 1, wherein: an annular filter cover (7) is arranged at the opening of the inner chamber (1), and the outer side of the filter cover (7) is of an arc-shaped structure.
9. The piston type flow regulating valve according to claim 1, wherein: the outer peripheral surface of the first limiting piece (41) is provided with axial guide grooves (45), and the axial guide grooves (45) are uniformly distributed along the axial direction of the first limiting piece (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410451565.5A CN118049532B (en) | 2024-04-16 | 2024-04-16 | Piston type flow regulating and pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410451565.5A CN118049532B (en) | 2024-04-16 | 2024-04-16 | Piston type flow regulating and pressure regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118049532A true CN118049532A (en) | 2024-05-17 |
| CN118049532B CN118049532B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410451565.5A Active CN118049532B (en) | 2024-04-16 | 2024-04-16 | Piston type flow regulating and pressure regulating valve |
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| Country | Link |
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| CN (1) | CN118049532B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5273405A (en) * | 1992-07-07 | 1993-12-28 | Jet Edge, Inc. | Fluid cushioning apparatus for hydraulic intensifier assembly |
| CN206309956U (en) * | 2016-12-26 | 2017-07-07 | 福建高中压阀门科技有限公司 | Direct-current piston type current-regulating voltage-regulating with filtering controls valve |
| CN207261669U (en) * | 2017-09-06 | 2018-04-20 | 胜利阀门有限公司 | A kind of step piston flow regulating valve |
| CN210566632U (en) * | 2019-09-18 | 2020-05-19 | 沪航科技集团有限公司 | Flow-regulating pressure-regulating valve |
| CN115388191A (en) * | 2022-09-24 | 2022-11-25 | 河南上阀阀门股份有限公司 | Hydraulic flow-regulating pressure-regulating valve |
-
2024
- 2024-04-16 CN CN202410451565.5A patent/CN118049532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5273405A (en) * | 1992-07-07 | 1993-12-28 | Jet Edge, Inc. | Fluid cushioning apparatus for hydraulic intensifier assembly |
| CN206309956U (en) * | 2016-12-26 | 2017-07-07 | 福建高中压阀门科技有限公司 | Direct-current piston type current-regulating voltage-regulating with filtering controls valve |
| CN207261669U (en) * | 2017-09-06 | 2018-04-20 | 胜利阀门有限公司 | A kind of step piston flow regulating valve |
| CN210566632U (en) * | 2019-09-18 | 2020-05-19 | 沪航科技集团有限公司 | Flow-regulating pressure-regulating valve |
| CN115388191A (en) * | 2022-09-24 | 2022-11-25 | 河南上阀阀门股份有限公司 | Hydraulic flow-regulating pressure-regulating valve |
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|---|---|
| CN118049532B (en) | 2024-06-11 |
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