CN201339737Y - Valve core positioning device for reducing valve - Google Patents
Valve core positioning device for reducing valve Download PDFInfo
- Publication number
- CN201339737Y CN201339737Y CNU2008201576738U CN200820157673U CN201339737Y CN 201339737 Y CN201339737 Y CN 201339737Y CN U2008201576738 U CNU2008201576738 U CN U2008201576738U CN 200820157673 U CN200820157673 U CN 200820157673U CN 201339737 Y CN201339737 Y CN 201339737Y
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- CN
- China
- Prior art keywords
- valve
- main
- core
- main valve
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fluid-Driven Valves (AREA)
Abstract
The utility model provides a valve core positioning device for a reducing valve, which comprises a valve seat of a main valve, a valve stem, and a valve core of the main valve, wherein the valve seat of the main valve is additionally provided with a reinforcing rib and a guide hole; the valve stem is joined with the valve core of the main valve; and the valve stem vertically moves in the guide hole which is in the valve seat of the main valve. The valve core positioning device for the reducing valve ensures that the valve core of the main valve of the reducing valve is accurately reset in the process of movement, thereby reducing the leakage at the port of the reducing valve, which is caused by inaccurate reset of the valve core.
Description
Technical field
The utility model relates to a kind of reduction valve spool positioning device, and is particularly related to the reduction valve spool positioning device of the side-play amount of a kind of distortion that limits reduction valve main valve valve seat and valve core of main valve.
Background technique
The external at present pilot valve type reduction valve that uses at most, the mode that adopts pilot valve to combine with main valve body, before valve opening, the spool valve seat of whole pilot valve and main valve all is in closed state.For opening valve, need to regulate the adjusting bolt of reduction valve pilot valve at first downwards, the compression of pilot valve Regulation spring promotes the pilot valve spool by pilot valve diaphragm and lifts off a seat, and the pilot valve valve port is opened, fluid enters the pilot valve diaphragm chamber by the pilot valve valve port, enters the barrier film below of main valve master chamber of septum again through pressure tube.Upwards distortion behind the barrier film pressurized, promote the main valve valve rod, valve core of main valve is lifted off a seat, the main valve valve port is opened, a large amount of fluids enter reduction valve by valve port downstream line, rising along with downstream line pressure, the hydrodynamic pressure of downstream line conducts to the below of pilot valve diaphragm chamber barrier film by the feedback pipe, the promotion pilot valve diaphragm moves upward, the pilot valve spool is under the effect of pilot valve returning spring, reduce the open degree of pilot valve valve port gradually, the pressure that flows into main valve chamber of septum below by the pilot valve valve port reduces, and under the fluid pressure action above the valve core of main valve, the open degree of main valve valve port is also corresponding to be reduced, the upstream fluid pressure that finally acts on main barrier film below balances each other with the downstream pressure that acts on the pilot valve diaphragm below, reduction valve by main valve valve port open degree variation so that to keep the weighing apparatus of reduction valve downstream fluid pressure fixed.
Yet, because reduction valve main valve valve rod has only a guiding device, valve core of main valve is under the promotion of upstream fluid, position when causing spool to reply valve seat easily is inaccurate, reduction valve valve core of main valve valve seat leakage, and then cause the instability of reduction valve downstream fluid pressure, this phenomenon is especially even more serious under the reduction valve closed condition, cause downstream safety valve action or device damage, the processing procedure product rejection.
The model utility content
The utility model provides a kind of reduction valve spool positioning device, with the distortion of restriction reduction valve main valve valve seat and the side-play amount of valve core of main valve.
In order to achieve the above object, the utility model provides a kind of reduction valve spool positioning device, comprises main valve valve seat, valve rod, valve core of main valve, it is characterized in that: have additional stiffening rib and pilot hole in the described main valve valve seat.
Described valve rod and valve core of main valve are bonded together, and vertically-acting in the pilot hole of valve rod in the main valve valve seat.
Be provided with screw thread in the described valve core of main valve, wherein valve core of main valve is in the same place by a locking nut and described threaded joint with valve rod.
The utility model is by setting up stiffening rib and pilot hole in the main valve valve seat, the distortion of restriction reduction valve main valve valve seat and the side-play amount of valve core of main valve, simultaneously, main valve valve rod and main valve plug are bonded together, convenient in actual use to the adjustment of the maximum open degree of reduction valve main valve valve port, can guarantee reduction valve valve core of main valve accurately resetting in course of action by said structure, reduce because valve core of main valve is replied the inaccurate reduction valve valve port leakage phenomenon that causes.
Description of drawings
Figure 1 shows that the reduction valve sectional drawing.
Figure 2 shows that valve core of main valve and valve rod connection diagram.
Figure 3 shows that the valve seat schematic representation.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
Referring to Fig. 1, Fig. 1 is the reduction valve sectional drawing, and before valve opening, whole pilot valve and valve core of main valve 101, main valve valve seat 104 all are in closed state.For opening valve, need to regulate the adjusting bolt 201 of reduction valve pilot valve at first downwards, 202 compressions of pilot valve Regulation spring promote pilot valve spool 204 by pilot valve diaphragm 203 and leave pilot valve seat 212, the pilot valve valve port is opened, fluid enters pilot valve diaphragm chamber 213 by the pilot valve valve port, enters main barrier film 209 belows of main valve chamber of septum 208 again through pressure tube 206.Upwards distortion behind main barrier film 209 pressurizeds, promote valve rod 103, make valve core of main valve 101 leave main valve valve seat 104, the main valve valve port is opened, a large amount of fluids enter reduction valve by the main valve valve port downstream line, rising along with downstream line pressure, the hydrodynamic pressure of downstream line conducts to the below of pilot valve diaphragm chamber 213 barrier films by feedback pipe 207, promoting pilot valve diaphragm 203 moves upward, pilot valve spool 201 is under the effect of pilot valve returning spring 210, reduce the open degree of pilot valve valve port gradually, the pressure that flows into main valve chamber of septum 208 belows by the pilot valve valve port reduces, under the fluid pressure action above the valve core of main valve 101, the open degree of main valve valve port is also corresponding to be reduced, final effect is that the upstream fluid pressure of main barrier film 209 belows and the downstream pressure that acts on pilot valve diaphragm 203 belows balance each other, reduction valve by main valve valve port open degree variation so that to keep the weighing apparatus of reduction valve downstream fluid pressure fixed.
The inaccurate reduction valve valve port leakage problem that causes in position when replying the main valve valve seat in order to solve valve core of main valve, the utility model is primarily aimed at reduction valve spool positioning device, be that main valve valve seat, valve rod, valve core of main valve improve, its concrete structure sees also Fig. 2 and Fig. 3.
Referring to Fig. 2, Fig. 2 is main valve valve seat 104 schematic representation, which is provided with pilot hole 302 and stiffening rib 303.
Referring to Fig. 3, Fig. 3 is valve core of main valve 101 and valve rod 103 connection diagrams, wherein is provided with screw thread in the valve core of main valve 101, and valve core of main valve 101 is in the same place by locking nut 102 and the threaded joint that is arranged in the valve core of main valve 101 with valve rod 103.
Valve rod 103 passes the pilot hole 302 in the main valve valve seat, and in pilot hole 302 vertically-acting, when valve closes, because the effect of pilot hole 302 and stiffening rib 303, valve rod is restricted in the side-play amount of level, because valve rod 103 and valve core of main valve 101 engage, the side-play amount of substantially horizontal has also obtained restriction in valve core of main valve 101 reseting procedures, thereby guarantee that reduction valve valve core of main valve 101 can accurately reset in the main valve valve seat 104 in course of action, and then reduced because valve core of main valve is replied the inaccurate reduction valve valve port leakage problem that causes.
Though the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Have in the technical field under the utility model and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is as the criterion when looking claims person of defining.
Claims (3)
1. a reduction valve spool positioning device comprises main valve valve seat, valve rod, valve core of main valve, it is characterized in that: have additional stiffening rib and pilot hole in the described main valve valve seat.
2. reduction valve spool positioning device according to claim 1, it is characterized in that: described valve rod and valve core of main valve are bonded together, and vertically-acting in the pilot hole of valve rod in the main valve valve seat.
3. reduction valve spool positioning device according to claim 2 is characterized in that: be provided with screw thread in the described valve core of main valve, wherein valve core of main valve is in the same place by a locking nut and described threaded joint with valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201576738U CN201339737Y (en) | 2008-12-23 | 2008-12-23 | Valve core positioning device for reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201576738U CN201339737Y (en) | 2008-12-23 | 2008-12-23 | Valve core positioning device for reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201339737Y true CN201339737Y (en) | 2009-11-04 |
Family
ID=41235283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201576738U Expired - Fee Related CN201339737Y (en) | 2008-12-23 | 2008-12-23 | Valve core positioning device for reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201339737Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236776A (en) * | 2018-09-29 | 2019-01-18 | 庆安集团有限公司 | A kind of spool positioning mechanism |
-
2008
- 2008-12-23 CN CNU2008201576738U patent/CN201339737Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236776A (en) * | 2018-09-29 | 2019-01-18 | 庆安集团有限公司 | A kind of spool positioning mechanism |
| CN109236776B (en) * | 2018-09-29 | 2020-08-11 | 庆安集团有限公司 | Valve core positioning mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20131223 |