CN204573595U - A kind of reduction valve - Google Patents
A kind of reduction valve Download PDFInfo
- Publication number
- CN204573595U CN204573595U CN201520216401.0U CN201520216401U CN204573595U CN 204573595 U CN204573595 U CN 204573595U CN 201520216401 U CN201520216401 U CN 201520216401U CN 204573595 U CN204573595 U CN 204573595U
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- valve
- pressure
- valve body
- pull bar
- reduction
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Abstract
The utility model discloses a kind of reduction valve, comprise valve body, valve gap, flange plate and Inner lock pull bar, described flange plate is located at valve body two ends, described valve body is fixedly connected with flange plate, described valve gap is located at above valve body, described valve gap is fixedly connected with valve body, described interior locking pull bar is located in valve gap, plane bearing is provided with above described interior locking pull bar, described plane bearing is fixedly connected with valve gap, described plane bearing is flexibly connected with interior locking pull bar, described valve body is provided with Jet injector, recoil blowdown valve, control valve and three-way switch valve, described Jet injector, recoil blowdown valve, control valve, three-way switch valve is communicated with successively with valve body, described Jet injector side is provided with pressure lock-up valve, this reduction valve range of regulation is large, safety reliability is high, long service life, convenient for installation and maintenance.
Description
Technical field
The utility model relates to a kind of valve technology field, particularly relates to a kind of reduction valve.
Background technique
Reduction valve is by regulating, inlet pressure being reduced to the outlet pressure of a certain needs, and rely on the energy of medium itself, make the valve that outlet pressure keeps stable automatically.From hydromechanical viewpoint, reduction valve is the throttle element that a local resistance can change, and namely by changing orifice size, the kinetic energy of flow velocity and fluid being changed, causes the different pressure losses, thus reach the object of decompression.Then rely on the adjustment of control and regulation system, the fluctuation of downstream pressure and spring force are balanced each other, makes downstream pressure keep constant in certain margin of error.Range of regulation: it refers to the adjustable extent of reduction valve delivery pressure P2, requires the precision reaching regulation within the scope of this.Range of regulation is main relevant with the rigidity of pressure adjusting spring.Pressure characteristics: when it refers to that flow g is definite value, the characteristic causing delivery pressure to fluctuate because of incoming pressure fluctuation.Delivery pressure fluctuation is less, and the characteristic of reduction valve is better.Delivery pressure just must not change with incoming pressure change substantially lower than incoming pressure-definite value.Flow characteristics: it refers to incoming pressure-regularly, the holding property that delivery pressure changes with the change of output flow g.When flow g changes, the change of delivery pressure is the smaller the better.General delivery pressure is lower, and it is less with the change fluctuation of output flow.
Fluid pressure higher for pipeline before valve can be reduced to the level after valve needed for pipeline by it.Here transmission medium mainly water.Reduction valve is widely used in the too high region of tall building, city water-supply pipe network hydraulic pressure, mine and other occasions, to ensure that in water supply system, each water spot obtains suitable service hydraulic pressure and flow.In view of the leak rate of water and waste degree are almost directly proportional with the hydraulic pressure size of water supply system, therefore reduction valve has and improves system conditions and potential water saving effect, and its water-saving result is about 30% according to statistics.
The action principle of reduction valve reduces hydraulic pressure by valve inner flow passage to the local resistance of current, and the scope that hydraulic pressure falls is regulated automatically by the import and export differential water pressures of the film or piston both sides that connect flap.Proportional pressure reducing principle utilizes the hydraulic pressure of floating piston in valve body than controlling, and entrance end Pressure reducing ratio is inversely proportional to import and export side piston area ratio.This reduction valve stable working friction; Without spring in valve body, therefore without the worry of spring corrosion, metal fatigue failure; Favorable sealing property is non-leakage, thus not only subtracts dynamic pressure (during water flow) but also subtract static pressure (when flow is 0); Particularly while decompression, do not affect water flow.Though current have very large loss of head by reduction valve, owing to decreasing the waste of water and making flow system flow distribute rationally, improve system layout and operating mode, be therefore still energy-conservation generally speaking.Medium is the occasion of steam, should select guide piston pressure reducing valve or pilot bellows type relief valve.In order to the convenience operating, adjust and keep in repair, reduction valve generally should be arranged on horizontal pipe.Through the post-decompression fluid of Combined pressure reducing valve by after water purifier filtration, then enter each by hydraulic control valve and use water spot.If pipeline superpressure, Decompression valves can fully be opened and pressure release in time.Combined pressure reducing valve is the pressure regulating equipment of the water system amount body design run under aiming at complex working condition, by outlet pressure locking system, and feedback system, and valve body of main valve composition.The difference of Combined pressure reducing valve and conventional vacuum valve is: reponse system is for subsequent use for on-line maintenance each other; The applicable more not good water quality of recoil drainage.
In some Decompression Controlling loop, the outlet pressure of reduction valve is used to the control oil liquid pressure size controlling electro-hydraulic reversing valve or external control sequence valve etc., when after electro-hydraulic reversing valve or the commutation of external control sequence valve or work, the vanishing of reduction valve oil outlet flow, but pressure also needs to keep original pressure set up.In this case, because valve outlet port flow is zero, the flow flowing through pressure-reduction outlet only has pilot flow.Because pilot flow is little, generally within 2L/min, therefore main valve pressure-reduction outlet is substantially close to closed positions (aperture is minimum), and pilot flow is flowed out by triangular groove or tilted conical surface, if main valve plug coordinated pine or wore and tore excessive, then leakage rate increased.By Flow continuity theorem, this part leakage rate also must be come from main valve plug damping hole stream, namely the flow flowing through damping hole is made up of pilot flow and leakage rate two-part, and damping hole area and main spool spring chamber oil liquid pressure do not become (spring chamber oil liquid pressure is determined by the pressure adjusting spring pre compressed magnitude mixed up), for making to be increased by the flow of damping hole, the rising of main valve cavity of resorption oil liquid pressure must be caused.Therefore, after reduction valve outlet pressure is set up, if when rate of discharge is zero, outlet pressure can coordinate pine because of main valve plug or wear and tear excessive and raise.
Current existing reduction valve inflow-rate of water turbine is little, and pressure relief ranges is little, and reliability is lower, and working life is not long.
Summary of the invention
It is large that the technical problems to be solved in the utility model is to provide a kind of range of regulation, and safety reliability is high, long service life, reduction valve convenient for installation and maintenance.
For solving the problem, the utility model adopts following technological scheme:
A kind of reduction valve, comprise valve body, valve gap, flange plate and Inner lock pull bar, described flange plate is located at valve body two ends, flange plate can facilitate valve body to be arranged on pipeline, make installation and maintenance convenient, described valve body is fixedly connected with flange plate, described valve gap is located at above valve body, valve gap conveniently reduces pressure pressure regulating valve, make Inner lock pull bar can effectively run, Inner locks pull bar interiorly can lock Protective valve body, described valve gap is fixedly connected with valve body, described interior locking pull bar is located in valve gap, plane bearing is provided with above described interior locking pull bar, plane bearing can keep regulating handle can rotate adjustment pressure fast, described plane bearing is fixedly connected with valve gap, described plane bearing is flexibly connected with interior locking pull bar, Jet injector utilizes working fluid to carry out the fluid conveying of transferring energy and quality, recoil blowdown valve can realize the blowdown that recoils, described valve body is provided with Jet injector, recoil blowdown valve, control valve and three-way switch valve, control valve can the logical section of fluid, described Jet injector, recoil blowdown valve, control valve, three-way switch valve is communicated with successively with valve body, three-way switch valve realizes the fluid section of leading to that reduction valve can control at different pipeline, described Jet injector side is provided with pressure lock-up valve, pressure lock-up valve can realize locking when hydrodynamic pressure goes beyond the limit.
As preferably, described pressure lock-up valve is provided with catheter pressure, catheter pressure can keep fluid can not reveal in flow process.
As preferably, described pressure lock-up valve is communicated with Jet injector by catheter pressure, makes pressure lock-up valve can lock the pressure of Jet injector.
As preferably, described catheter pressure becomes bending to arrange, and reduces taking of space, facilitates catheter pressure to be arranged on reduction valve.
As preferably, described flange plate is provided with through hole, flange plate can be kept firmly to install, holding structure is stablized.
As preferably, described plane bearing is provided with regulating handle, the convenient pressure of reduction valve that regulates limits.
It is large that this technological scheme has range of regulation, and safety reliability is high, long service life, feature convenient for installation and maintenance.
The beneficial effects of the utility model are: the flange plate of setting can facilitate valve body to be arranged on pipeline, make installation and maintenance convenient, valve gap conveniently reduces pressure pressure regulating valve, make Inner lock pull bar can effectively run, Inner locks pull bar interiorly can lock Protective valve body, plane bearing can keep regulating handle can rotate adjustment pressure fast, Jet injector utilizes working fluid to carry out the fluid conveying of transferring energy and quality, recoil blowdown valve can realize the blowdown that recoils, three-way switch valve realizes the fluid section of leading to that reduction valve can control at different pipeline, pressure lock-up valve can realize locking when hydrodynamic pressure goes beyond the limit, catheter pressure can keep fluid can not reveal in flow process, pressure lock-up valve is communicated with the pressure making pressure lock-up valve can lock Jet injector with Jet injector by catheter pressure, regulating handle, the convenient pressure of reduction valve that regulates limits.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural drawing of a kind of reduction valve of the present utility model.
Fig. 2 is the structural drawing of the flange plate of a kind of reduction valve of the present utility model.
Embodiment
Consult shown in Fig. 1-Fig. 2, a kind of reduction valve, comprise valve body 1, valve gap 2, flange plate 3 and Inner lock pull bar 4, described flange plate 3 is located at valve body 1 two ends, described valve body 1 is fixedly connected with flange plate 3, described valve gap 2 is located at above valve body 1, described valve gap 2 is fixedly connected with valve body 1, described interior locking pull bar 4 is located in valve gap 2, in use, by flange plate 3, reduction valve is arranged on pipeline, rotating Inner locking pull bar 4 makes fluid pass through, flow through Jet injector 6, recoil blowdown valve 7, control valve 8 and three-way switch valve 9, hydrodynamic pressure is controlled finally by pressure lock-up valve 10, plane bearing 5 is provided with above described interior locking pull bar 4, described plane bearing 5 is fixedly connected with valve gap 2, described plane bearing 5 is flexibly connected with interior locking pull bar 4, described valve body 1 is provided with Jet injector 6, recoil blowdown valve 7, control valve 8 and three-way switch valve 9, described Jet injector 6, recoil blowdown valve 7, control valve 8, three-way switch valve 9 is communicated with successively with valve body 1, described Jet injector 6 side is provided with pressure lock-up valve 10.
Described pressure lock-up valve 10 is provided with catheter pressure 11, and in use, catheter pressure 11 can keep fluid can not reveal in flow process.
Described pressure lock-up valve 10 is communicated with Jet injector 6 by catheter pressure 11, in use, makes pressure lock-up valve 10 can lock the pressure of Jet injector 6.
Described catheter pressure 11 one-tenth bending is arranged, and in use, reduces taking of space, facilitates catheter pressure 11 to be arranged on reduction valve.
Described flange plate 3 is provided with through hole 12, in use, flange plate 3 can be kept firmly to install, holding structure is stablized.
Described plane bearing 5 is provided with regulating handle 13, and in use, the convenient pressure of reduction valve that regulates limits.
In use, by flange plate 3, reduction valve is arranged on pipeline, rotates Inner locking pull bar 4 and fluid is passed through, flow through Jet injector 6, recoil blowdown valve 7, control valve 8 and three-way switch valve 9, control hydrodynamic pressure finally by pressure lock-up valve 10.
The beneficial effects of the utility model are: the flange plate of setting can facilitate valve body to be arranged on pipeline, make installation and maintenance convenient, valve gap conveniently reduces pressure pressure regulating valve, make Inner lock pull bar can effectively run, Inner locks pull bar interiorly can lock Protective valve body, plane bearing can keep regulating handle can rotate adjustment pressure fast, Jet injector utilizes working fluid to carry out the fluid conveying of transferring energy and quality, recoil blowdown valve can realize the blowdown that recoils, three-way switch valve realizes the fluid section of leading to that reduction valve can control at different pipeline, pressure lock-up valve can realize locking when hydrodynamic pressure goes beyond the limit, catheter pressure can keep fluid can not reveal in flow process, pressure lock-up valve is communicated with the pressure making pressure lock-up valve can lock Jet injector with Jet injector by catheter pressure, regulating handle, the convenient pressure of reduction valve that regulates limits.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any change of expecting without creative work or replacement; all should be encompassed within protection domain of the present utility model; therefore, the protection domain that protection domain of the present utility model should limit with claims is as the criterion.
Claims (6)
1. a reduction valve, it is characterized in that: comprise valve body, valve gap, flange plate and Inner lock pull bar, described flange plate is located at valve body two ends, described valve body is fixedly connected with flange plate, described valve gap is located at above valve body, described valve gap is fixedly connected with valve body, described interior locking pull bar is located in valve gap, plane bearing is provided with above described interior locking pull bar, described plane bearing is fixedly connected with valve gap, described plane bearing is flexibly connected with interior locking pull bar, described valve body is provided with Jet injector, recoil blowdown valve, control valve and three-way switch valve, described Jet injector, recoil blowdown valve, control valve, three-way switch valve is communicated with successively with valve body, described Jet injector side is provided with pressure lock-up valve.
2. reduction valve according to claim 1, is characterized in that: described pressure lock-up valve is provided with catheter pressure.
3. reduction valve according to claim 2, is characterized in that: described pressure lock-up valve is communicated with Jet injector by catheter pressure.
4. reduction valve according to claim 3, is characterized in that: described catheter pressure becomes bending to arrange.
5. reduction valve according to claim 4, is characterized in that: described flange plate is provided with through hole.
6. reduction valve according to claim 5, is characterized in that: described plane bearing is provided with regulating handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216401.0U CN204573595U (en) | 2015-04-13 | 2015-04-13 | A kind of reduction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216401.0U CN204573595U (en) | 2015-04-13 | 2015-04-13 | A kind of reduction valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204573595U true CN204573595U (en) | 2015-08-19 |
Family
ID=53866230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520216401.0U Expired - Fee Related CN204573595U (en) | 2015-04-13 | 2015-04-13 | A kind of reduction valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204573595U (en) |
-
2015
- 2015-04-13 CN CN201520216401.0U patent/CN204573595U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |