CN219827758U - Speed control needle valve for water control pressure reducing valve piping - Google Patents
Speed control needle valve for water control pressure reducing valve piping Download PDFInfo
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- CN219827758U CN219827758U CN202320653927.XU CN202320653927U CN219827758U CN 219827758 U CN219827758 U CN 219827758U CN 202320653927 U CN202320653927 U CN 202320653927U CN 219827758 U CN219827758 U CN 219827758U
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- valve
- needle
- pressure reducing
- flow
- control pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The utility model discloses a speed control needle valve for a water control pressure reducing valve piping, relates to the field of valves, and solves the problems of poor flow dynamic stability and the like. A valve core is elastically arranged in the medium flow channel close to the second flow port in a floating manner, a valve hole is formed in the valve core, and the bottom surface of the valve core is opposite to the second flow port; the valve needle is fixedly connected with below the valve rod, and the valve needle is long and thin conical and extends to the second flow opening, and the tip of valve needle still movably penetrates in the valve opening. The valve needle with a slender cone shape can play a role in throttling when a medium flows into the second flow port from the first flow port, can also improve the adjusting precision, and can always penetrate into the valve hole even when the flow rate changes, so that the dynamic stability of the valve is improved; when the medium reversely flows to the first flow port, the medium pressure rushes up the valve core, the valve is opened without throttling, and the water conservancy control pressure reducing valve is restarted after stopping the pump, so that the pressure reducing function can be automatically recovered, readjustment is not needed, and the valve is suitable for the piping of the water conservancy control pressure reducing valve.
Description
Technical Field
The utility model relates to the field of valves, in particular to a speed control needle valve for a water control pressure reducing valve piping.
Background
In the piping of the hydraulic control pressure reducing valve, if the speed control device flowing into the rear end of the valve from the upper cavity of the diaphragm to the pilot valve is not provided, the phenomenon that the pressure of the rear end of the valve is unstable along with the change of the flow rate can occur in the field use process of the hydraulic control pressure reducing valve, and serious consequences can be caused sometimes, so that the needle valve is arranged on the hydraulic control pressure reducing valve for controlling the flow rate. Needle valves of the prior art such as the chinese utility model patent: CN216344070U is a novel flow-adjustable residue-free needle valve, the bottom of the valve rod is provided with a valve needle, and the bottom end of the valve needle passes through the bottom end of the installation through hole and can extend into or leave the medium flow channel; one end head of the valve needle is of a 45-60-degree inclined surface chamfering structure. However, if the needle valve is used in a water conservancy control pressure reducing valve, the 45-60-degree inclined chamfer of the needle valve is relatively slow in the change of flow in the valve, the dynamic stability of the flow is relatively poor, the adjusting precision is low, the needle valve is not suitable for the water conservancy control pressure reducing valve with small and medium caliber to be accurately adjusted, and the needle valve still has a throttling function when a medium flows reversely, and if the needle valve is applied to the water conservancy control pressure reducing valve, the water conservancy control pressure reducing valve needs to be readjusted, and the operation is complex.
Disclosure of Invention
The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a speed control needle valve for a water control pressure reducing valve piping, which solves the problems of poor flow dynamic stability and the like.
The technical scheme of the utility model is as follows: the valve comprises a valve body and a valve rod, wherein a first flow port, a second flow port and a medium flow channel are arranged in the valve body; the valve needle is fixedly connected with below the valve rod, and the valve needle is long and thin conical and extends to the second flow opening, and the tip of valve needle still movably penetrates in the valve opening.
By adopting the technical scheme, the slender conical valve needle can play a role in throttling when a medium flows into the second flow port from the first flow port, can also improve the regulation precision, and can improve the dynamic stability of the valve by penetrating the valve needle into the valve hole all the time even when the flow changes; when the medium reversely flows to the first flow port from the second flow port, the medium pressure rushes up the valve core, and the valve is opened without throttling, so that the water conservancy control pressure reducing valve is restarted after stopping the pump, the pressure reducing function can be automatically recovered, readjustment is not needed, and the valve is suitable for the tubing of the water conservancy control pressure reducing valve.
The utility model is further provided with: the valve needle comprises a conical part and a cylindrical part, wherein the cylindrical part is connected to the top side of the conical part, the included angle between the side wall of the conical part and the central shaft of the conical part is 2-10 degrees, the conical part movably penetrates into the valve hole, the outer diameter of the conical part gradually increases from bottom to top, and the maximum outer diameter of the conical part is slightly larger than the inner diameter of the valve hole.
With the above further arrangement, when the medium is punched up the valve core, the valve core is guided by the conical part to be opened and limited on the valve needle, and the medium passes through the medium flow channel from the opened position of the valve core.
Still further, the present utility model provides: an elastic piece is arranged between the valve core and the medium flow passage, and two ends of the elastic piece are propped against the valve core and the inner wall of the medium flow passage.
By adopting the further arrangement, the elastic piece promotes the valve core to react rapidly when the direction of the medium changes, so that the valve core can be continuously adjusted.
Still further, the present utility model is provided with: the elastic piece is a pagoda-shaped spring.
By adopting the further arrangement, the device has small volume, large load and variable rigidity, and is very suitable for being used in a needle valve.
Still further, the present utility model is provided with: the lock nut is installed on the top of valve rod, lock nut and valve rod threaded connection, the shaft of valve rod and valve body threaded connection.
By adopting the above still further arrangement, the depth of the valve needle entering the valve hole can be adjusted by rotating the valve rod, the valve flow can be adjusted within a certain range, and the valve rod is locked by the locking nut to determine the position of the valve needle.
Still further, the present utility model is provided with: the valve body is internally provided with a valve cavity, the bottom of the valve rod is provided with a ring table, and the ring table is in sliding fit with the valve cavity; and a sealing element is arranged on the annular table and is in sealing fit with the valve cavity.
With the above still further arrangement, the annular table has a guiding function, and the sealing member is used for sealing the valve cavity.
Still further, the present utility model is provided with: the valve body comprises a main body and a base, and the base is fixed at the bottom of the main body in a threaded manner.
By adopting the above arrangement, the valve body is arranged in a split type, so that the valve body is convenient to assemble and process.
Drawings
FIG. 1 is a schematic diagram of the structure of the medium of the present utility model in the forward direction;
FIG. 2 is a schematic diagram of the structure of the utility model when the medium flows in reverse direction;
wherein, 1, the valve body; 2. a valve stem; 11. a first flow port; 12. a second flow port; 13. a media flow path; 3. a valve core; 31. a valve hole; 4. a valve needle; 41. a conical portion; 42. a cylindrical portion; 5. an elastic member; 6. a lock nut; 14. a valve cavity; 21. a ring table; 22. a seal; 15. a main body; 16. and (5) a base.
Description of the embodiments
The speed control needle valve for the water control pressure reducing valve piping shown in fig. 1 and 2 comprises a valve body 1 and a valve rod 2, wherein a first flow port 11, a second flow port 12 and a medium flow passage 13 are arranged in the valve body 1, the medium flow passage 13 is respectively communicated with the first flow port 11 and the second flow port 12, and the first flow port 11 and the second flow port 12 are mutually perpendicular. A valve core 3 is elastically and floatingly arranged in the medium flow channel 13 close to the second flow port 12, a valve hole 31 is formed in the center of the valve core 3, the bottom surface of the valve core 3 is opposite to the second flow port 12, and the medium of the second flow port 12 can impact the bottom surface of the valve core 3; the lower part of the valve rod 2 is integrally connected with a valve needle 4, the valve needle 4 and the valve rod 2 are coaxially arranged, the valve needle 4 is in an elongated taper shape and extends towards the direction of the second flow port 12, and the end part of the valve needle 4 also movably penetrates into the valve hole 31. The first flow port 11 and the second flow port 12 are respectively connected in a pipe of the hydraulic control valve, when a medium flows from the first flow port 11 into the second flow port 12 through the medium flow channel 13, namely, flows forward, the valve core 3 abuts against the second flow port 12 along with the medium, the valve needle 4 is regulated by the valve rod 2 to enter the valve hole 31, and a gap between the valve needle 4 and the valve hole 31 forms a throttling port for regulating flow. When the medium flows to the first flow port 11 in the reverse direction, the pressure of the medium presses the bottom surface of the valve core 3, the valve core 3 floats and rises, a channel for medium to flow is formed below the valve core 3, and the valve does not play a throttling role.
The valve needle 4 comprises a conical portion 41 and a cylindrical portion 42, the cylindrical portion 42 is connected to the top side of the conical portion 41, the included angle between the side wall of the conical portion 41 and the central axis thereof is 2-10 degrees, namely, the conical portion 41 is in an elongated conical shape, the conical portion 41 movably penetrates into the valve hole 31, the outer diameter of the conical portion 41 gradually increases from bottom to top, and the maximum outer diameter of the conical portion 41 is slightly larger than the inner diameter of the valve hole 31. When the medium rushes up the valve core 3, the valve core 3 is guided by the conical part 41, so that the inner wall of the valve hole 31 contacts the conical part 41 to form a limit, the lower part of the valve core 3 is opened, and the medium passes through the medium flow channel 13 from the opening position of the valve core 3 to the first flow port 11. When the medium returns to flow into the second flow port 12, the valve element 3 is returned to be close to the second flow port 12 by the medium pressure, and a throttle is formed between the valve needle 4 and the valve hole 31.
An elastic piece 5 is arranged between the valve core 3 and the medium flow channel 13, and two ends of the elastic piece 5 are propped against the inner walls of the valve core 3 and the medium flow channel 13. The elastic piece 5 is a pagoda-shaped spring, the top end of the pagoda-shaped spring is propped against the top wall of the medium flow channel 13, and the bottom end of the pagoda-shaped spring is fixedly sleeved on the valve core 3 and is propped against the pressure. When the valve core 3 is lifted under force, the elastic piece 5 is compressed under force, and when the valve core 3 returns, the elastic piece 5 stretches to return to the state.
The lock nut 6 is installed on the top of valve rod 2, lock nut 6 and valve rod 2 threaded connection, the shaft of valve rod 2 and valve body 1 threaded connection. The depth of the valve needle 4 into the valve bore 31 can be adjusted by rotating the valve stem 2 to determine the size of the orifice, the valve flow can be adjusted within a certain range, and the valve stem 2 is locked by the lock nut 6 to determine its position.
The valve body 1 is internally provided with a valve cavity 14, the bottom of the valve rod 2 is provided with a ring table 21, the ring table 21 is in sliding fit with the valve cavity 14, and the ring table 21 is used for guiding the movement of the valve rod 2. The annular table 21 is provided with a sealing element 22 in a sealing manner, the sealing element 22 is in sealing fit with the valve cavity 14, and the sealing element 22 prevents the medium from leaking outwards.
The valve body 1 comprises a split main body 15 and a base 16, the base 16 is fixed at the bottom of the main body 15 in a threaded manner, the second flow port 12 is positioned in the base 16, and the first flow port 11 and the medium flow passage 13 are positioned in the main body 15.
Claims (7)
1. The utility model provides a speed control needle valve for water accuse relief pressure valve coupling, includes valve body and valve rod, be equipped with first flow opening, second flow opening and medium runner in the valve body, its characterized in that: a valve core is elastically arranged in the medium flow channel close to the second flow port in a floating manner, a valve hole is formed in the valve core, and the bottom surface of the valve core is opposite to the second flow port; the valve needle is fixedly connected with the lower part of the valve rod, is of an elongated taper shape and extends towards the second flow opening, and the end part of the valve needle also movably penetrates into the valve hole.
2. The speed control needle valve for a water control pressure reducing valve piping according to claim 1, wherein: the valve needle comprises a conical part and a cylindrical part, the cylindrical part is connected to the top side of the conical part, the included angle between the side wall of the conical part and the central shaft of the conical part is 2-10 degrees, the conical part movably penetrates into the valve hole, the outer diameter of the conical part gradually increases from bottom to top, and the maximum outer diameter of the conical part is slightly larger than the inner diameter of the valve hole.
3. A speed control needle valve for a water control pressure reducing valve piping according to claim 1 or 2, characterized in that: an elastic piece is arranged between the valve core and the medium flow passage, and two ends of the elastic piece are propped against the valve core and the inner wall of the medium flow passage.
4. A speed control needle valve for a water control pressure relief valve manifold as defined in claim 3 wherein: the elastic piece is a pagoda-shaped spring.
5. A speed control needle valve for a water control pressure reducing valve piping according to claim 1 or 2, characterized in that: the locking nut is installed on the top of valve rod, locking nut and valve rod threaded connection, the shaft of valve rod and valve body threaded connection.
6. The rate control needle valve for a water control pressure reducing valve piping according to claim 5, wherein: a valve cavity is arranged in the valve body, a ring table is arranged at the bottom of the valve rod, and the ring table is in sliding fit with the valve cavity; and the ring table is provided with a sealing element which is in sealing fit with the valve cavity.
7. A speed control needle valve for a water control pressure reducing valve piping according to claim 1 or 2, characterized in that: the valve body comprises a main body and a base, and the base is fixed at the bottom of the main body in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320653927.XU CN219827758U (en) | 2023-03-27 | 2023-03-27 | Speed control needle valve for water control pressure reducing valve piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320653927.XU CN219827758U (en) | 2023-03-27 | 2023-03-27 | Speed control needle valve for water control pressure reducing valve piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219827758U true CN219827758U (en) | 2023-10-13 |
Family
ID=88280796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320653927.XU Active CN219827758U (en) | 2023-03-27 | 2023-03-27 | Speed control needle valve for water control pressure reducing valve piping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219827758U (en) |
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2023
- 2023-03-27 CN CN202320653927.XU patent/CN219827758U/en active Active
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