CN102913654A - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
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- CN102913654A CN102913654A CN2012104311212A CN201210431121A CN102913654A CN 102913654 A CN102913654 A CN 102913654A CN 2012104311212 A CN2012104311212 A CN 2012104311212A CN 201210431121 A CN201210431121 A CN 201210431121A CN 102913654 A CN102913654 A CN 102913654A
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Abstract
The invention provides a pressure reducing valve and belongs to the technical field of valve manufacturing. The pressure reducing valve solves the problem that existing pressure reducing valves are small in adjusting range, springs are inconvenient to replace and the like. The pressure reducing valve comprises a valve body, wherein an inlet end and an outlet end are arranged at two ends of the valve body respectively, a valve core is arranged inside the valve body, an inner end of a valve rod is fixedly connected with the valve core, an outer end of the valve rod extends out of the valve body, a balancing casing is arranged on the outer side of the valve body, a diaphragm is arranged inside the balancing casing and divides the balancing casing into an upper cavity and a lower cavity, the upper independent cavity is adjacent to the lower independent cavity, a pressure guide opening which is connected with the output end is arranged on the outer side of the upper cavity of the balancing casing, the valve rod is fixedly connected with one side of the diaphragm, the other side of the diaphragm is fixedly connected with a connecting rod, an outer end of the connecting rod extends out of the balancing casing, a spring is arranged on the connecting rod, two ends of the spring acts upon the connecting rod and the balancing casing respectively, and the diaphragm trends to move upwards under the effect of the elasticity of the spring. The pressure reducing valve has the advantages of being wide in pressure adjusting range, good in spring performance, convenient to replace and the like.
Description
Technical field
The invention belongs to technical field of valve manufacturing, relate to a kind of reduction valve.
Background technique
Reduction valve is by adjusting, inlet pressure is reduced to the outlet pressure of a certain needs, and relies on the energy of medium itself, makes outlet pressure automatically keep stable valve.Reduction valve is a throttle element that local resistance can change, and namely by changing orifice size, the kinetic energy of flow velocity and fluid is changed, and causes the different pressure losses, thereby reaches the purpose of decompression.Then rely on the adjusting of control and regulating system, the fluctuation of downstream pressure and spring force are balanced each other, make downstream pressure in certain margin of error, keep constant.
Existing reduction valve, for example the Chinese patent literature data discloses diaphragm type pressure-reducing valve [application number 201120461125.6; Notice of authorization number: CN202327281U], it comprises main valve and diaphragm control, the valve seat outlet is provided with guide sleeve, guide sleeve top is shaped with through hole, be provided with control valve between main valve and the diaphragm control gear, the import of control valve is communicated with the inlet passage of valve body by pressure inlet tube, and outlet is communicated with upper film chamber and the lower film chamber of diaphragm control gear respectively by tee union.This kind reduction valve main valve inlet passage pressure medium is introduced upper film chamber and lower film chamber by control valve, and between lower film chamber and control valve outlet, the superpressure one-way valve is set, the pressure reduction maintenance is constant up and down to make diaphragm, avoid diaphragm impacted by pressure medium damaged, simultaneously main valve outlet passage pressure is introduced the control chamber of control valve, the aperture of control control valve, thereby control main valve flap aperture, make main valve outlet passage pressure not be subjected to the impact of its inlet passage pressure surge, to reach the purpose of decompression precision, voltage stabilizing.
But this kind reduction valve, after assembling was finished, spring was the inside that is in reduction valve, and spring by given design of pressure well after, can not carry out change again, regulation range is little, performance is low, in case and after spring damages or elasticity weakens, change spring very inconvenient.
Summary of the invention
The objective of the invention is for the above-mentioned problems in the prior art, provide a kind of pressure regulation range variable, the spring performance is good and change easily reduction valve.
Purpose of the present invention can realize by following technical proposal: a kind of reduction valve, comprise the inner valve body of cavity that is, the two ends of described valve body are respectively entrance point and outlet end, has spool in the described valve body, one valve rod is inner to be connected with spool, valve body is stretched out in the valve rod outer end, it is characterized in that, the described valve body outside has the balance housing, have diaphragm and diaphragm in the described balance housing balance housing is divided into two neighbouring individual cavity: epicoele, cavity of resorption, the epicoele of the described balance housing outside has for the pilot port that links with outlet end, above-mentioned valve rod is connected in diaphragm one side, and the diaphragm opposite side is fixed with connecting rod, and the balance housing is stretched out in above-mentioned connecting rod outer end, have spring on the described connecting rod and act on respectively on connecting rod and the balance housing at the two ends of spring, and diaphragm has the trend of moving under the elastic force effect of spring.
When the entrance point of fluid by reduction valve enters in the valve body, be upstream pressure this moment, through after the throttling of spool, fluid flows out in valve body, becomes the pressure of outlet end behind the valve, outlet end is connected by the epicoele of pilot port with the balance housing, the fluid of outlet end flow into by the pilot port in the epicoele of balance housing, and the pressure-acting of generation is on diaphragm, and the active force of generation and the reaction force of spring balance each other, determine the opening degree of spool, the pressure behind the control valve.
In above-mentioned a kind of reduction valve, described connecting rod lower end is fixed with two compressing tablets, and above-mentioned diaphragm is pressed between two compressing tablets.Diaphragm has elasticity, can move up and down with the change of both sides hydrodynamic pressure about it, and two compressing tablets are fixedly clamped diaphragm in the centre, when diaphragm is moved, can in time pass to connecting rod by compressing tablet, and transmission efficiency is high, and accuracy is high.
In above-mentioned a kind of reduction valve, be fixed with guide cylinder on the described balance housing, above-mentioned connecting rod middle part is positioned on the guide cylinder and between is provided with seal ring.Connecting rod is positioned at guide cylinder, and guide cylinder play the guiding role to the movement of connecting rod, makes connecting rod when moving up and down, skew about not understanding, and when diaphragm moved up and down, connecting rod can transmit accurately, and accuracy is high; The setting of seal ring is to prevent that the fluid in the balance housing epicoele from oozing out good sealing effect from the slit between connecting rod and the guide cylinder.
In above-mentioned a kind of reduction valve, be fixed with lower spring cup on the described guide cylinder, the described small end upper spring seat that has been threaded, the two ends of above-mentioned spring act on respectively on upper spring seat and the lower spring cup.The spring of this reduction valve is to be positioned at the valve body outside, be outlet structure, spring housing is located at the outside of connecting rod, and an end acts on lower spring cup and links to each other with the balance housing, the other end acts on upper spring seat and links to each other with connecting rod, makes the compression of spring or extension corresponding with moving up and down of diaphragm.
In above-mentioned a kind of reduction valve, described upper spring seat comprises the screw that is threaded with connecting rod and is plate-like and is enclosed within positioning disk on the screw.The slightly larger in diameter of positioning disk is in the diameter of spring, and spring is resisted against on the positioning disk, and screw thread is fixed on of connecting rod, avoids positioning disk to come off under the effect of spring force.
In above-mentioned a kind of reduction valve, be fixed with the gear edge on the described valve rod, cover has Returnning spring, the two ends of Returnning spring to act on respectively on gear edge and the valve body and has at the elastic force effect lower valve core of Returnning spring and moves and make valve be in the trend of opening state on the valve rod.Returnning spring is kept off the compression of edge and valve body, itself has the trend of outside extension, the gear edge on the elastic force effect lower valve rod of spring, and the trend that valve rod is moved on having is moved on the valve rod and can be moved on the band movable valve plug, thereby makes valve be in the state of unlatching.
In above-mentioned a kind of reduction valve, described balance lower housing portion is fixed with and is tubular and has the joint one that protrudes catch outside it, described valve body top has the tubular of being and threaded joint two, one nuts of its outside tool are threaded on the joint two and the shade of nut is pressed on the above-mentioned catch.The shade of nut is pressed on the catch of joint one and is threaded with joint two, screws nut and joint two, joint one and joint two-phase is connected, thereby valve body and balance housing are connected mutually, and linkage structure is simple.
In above-mentioned a kind of reduction valve, described joint one sidepiece has the recessed locating slot of annular one, and above-mentioned catch is positioned at the locating slot place and its part is stretched out joint one outside.Catch separates with joint one, makes things convenient for spiro cap in the outside of joint one, and is easy for installation.
Compared with prior art, reduction valve provided by the invention has the following advantages:
1, the spring of this reduction valve is the outside that is positioned at valve body, is outlet structure, and spring is not subjected to erosion, the interference of impurity in fluid and the fluid, and the replacing good and spring of the performance of spring is very convenient.
2, the spring of this reduction valve is the outside that is positioned at valve body, is outlet structure, can directly pass through the compression degree of the screw Regulation spring of connecting rod upside, the pressure of control spring, and the regulation range of spring is variable, and regulation range is wide.
Description of drawings
Fig. 1 is the overall structure side view of this reduction valve.
Fig. 2 is that the B-B of this reduction valve Fig. 1 is to sectional view.
Among the figure, 1, valve body; 2, entrance point; 3, outlet end; 4, spool; 5, valve rod; 6, balance housing; 7, diaphragm; 8, epicoele; 9, cavity of resorption; 10, pilot port; 11, nut; 12, connecting rod; 13, spring; 14, compressing tablet; 15, guide cylinder; 16, seal ring; 17, lower spring cup; 18, upper spring seat; 18a, screw; 18b, positioning disk; 19, gear edge; 20, Returnning spring; 21, joint one; 21a, catch; 22, joint two; 23, locating slot.
Embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
This reduction valve is used for inlet pressure is reduced to the outlet pressure of a certain needs, and relies on the energy of medium itself, makes outlet pressure automatically keep stable valve, to reach the purpose of decompression.It comprises valve body 1, spool 4, valve rod 5, balance housing 6, connecting rod 12 and spring 13.
The inside of valve body 1 is cavity, the one end is entrance point 2, and the other end is outlet end 3, has spool 4 in the valve body 1, the inner of valve rod 5 and spool 4 are connected, the outer end stretches out that valve body 1 is outer to be connected in diaphragm 7 one sides with connecting rod 12 links, and the inner of valve rod 5 is fixed with gear along 19, and also overlapping has Returnning spring 20, one end of Returnning spring 20 acts on gear along on 19, the other end acts on the valve body 1, and Returnning spring 20 compressed generation elastic force move the trend of opening spool 4 thereby have to make on the valve rod 5.
The outside of valve body 1 has balance housing 6, and the diaphragm 7 in the balance housing 6 is divided into neighbouring two chambers independently with balance housing 6: epicoele 8 and cavity of resorption 9, epicoele 8 outsides have the pilot 10 that links with outlet end 3.Balance housing 6 upsides are fixed with guide cylinder 15, are fixed with lower spring cup 17 on the guide cylinder 15, and connecting rod 12 is arranged in guide cylinder 15, and 15 pairs of connecting rods 12 of guide cylinder play guiding and spacing, guide cylinder 15 be connected between be provided with seal ring 16.Connecting rod 12 passes the housing of balance housing 6 epicoeles 8, penetrate in the balance housing 6, the lower end of connecting rod 12 is connected with diaphragm 7, the lower end that connects has two compressing tablets 14, one compressing tablet 14 is positioned at the top of diaphragm 7, and a compressing tablet 14 is positioned at the below of diaphragm 7, and diaphragm 7 is pressed between two compressing tablets 14, connecting rod 12 and diaphragm 7 are connected, and moving up and down of diaphragm 7 can in time pass to connecting rod 12 by compressing tablet 14 accurately.The outside cover of connecting rod 12 has spring 13, the upper end of connecting rod 12 has the positioning disk 18b that is plate-like, one end of spring 13 is resisted against lower spring cup 17 the other ends and is resisted against on the positioning disk 18b, screw 18a is rotated in the upper end of connecting rod 12, positioning disk 18b is pressed down, Compress Spring 13, screw 18a and positioning disk 18b form upper spring seat 18, spring 13 compressed rear generation one opposite effect power have and promote upper spring seat 18, always drivening rod 12, compressing tablet 14, diaphragm 7 trend of moving on having.
The downside of balance housing 6 is fixed with tubular joint 1, the outside of joint 1 has the recessed locating slot 23 of annular one, be provided with catch 21a in the locating slot 23, the top of valve body 1 has the tubular of being and the threaded joint 22 of outside tool, nut 11 is enclosed within joint one 21 outsides, the shade of nut 11 is stuck on the catch 21a of joint 1, and nut 11 is threaded with the joint 22 on valve body 1 top, along with screwing of nut 11, nut 11 closely is connected joint 1 and joint 22, thereby valve body 1 and balance housing 6 are connected mutually.
This reduction valve in use, setting the front pressure of valve is P 1, pressure behind the valve is P2, when P2 pressure increases, P2 enters into the epicoele 8 of balance housing 6 by pilot port 10, the pressure that epicoele 8 acts on the diaphragm 7 also increases thereupon, at this moment, the active force of diaphragm 7 is greater than the reaction force of spring 13, spool 4 is moved down, and valve body 1 inner outlet end 3 reduces with the circulation area of entrance point 2, and it is large that the resistance of fluid becomes, thereby make the pressure drop of P2, until drop to setting value, till namely the reaction force of the active force of diaphragm 7 and spring 13 balances each other, in like manner, when downstream pressure P2 reduces, make pressure behind the valve be returned to the pressure of setting with above-mentioned opposite direction.
When needs change the setting value of downstream pressure P2, can pass through adjusting nut, the decrement that changes spring 13 realizes.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper more used valve body 1, entrance point 2, outlet end 3, spool 4, valve rod 5, balance housing 6, diaphragm 7, epicoele 8, cavity of resorption 9, pilot port 10, nut 11, connecting rod 12, spring 13, compressing tablet 14, guide cylinder 15, seal ring 16, lower spring cup 17, upper spring seat 18, screw 18a, positioning disk 18b, gear along 19, the terms such as Returnning spring 20, joint 1, catch 21a, joint 22, locating slot 23, do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (8)
1. reduction valve, comprise the inner valve body of cavity (1) that is, the two ends of described valve body (1) are respectively entrance point (2) and outlet end (3), has spool (4) in the described valve body (1), one valve rod (5) is inner to be connected with spool (4), valve body (1) is stretched out in valve rod (5) outer end, it is characterized in that, described valve body (1) outside has balance housing (6), have diaphragm (7) and diaphragm (7) in the described balance housing (6) balance housing (6) is divided into two neighbouring individual cavity: epicoele (8), cavity of resorption (9), the epicoele (8) of described balance housing (6) outside has for the pilot port (10) that links with outlet end (3), above-mentioned valve rod (5) is connected in diaphragm (7) one sides, diaphragm (7) opposite side is fixed with connecting rod (12), balance housing (6) is stretched out in above-mentioned connecting rod (12) outer end, have spring (13) on the described connecting rod (12) and act on respectively on connecting rod (12) and the balance housing (6) at the two ends of spring (13), and diaphragm (7) has the trend of moving under the elastic force effect of spring (13).
2. a kind of reduction valve according to claim 1 is characterized in that, described connecting rod (12) lower end is fixed with two compressing tablets (14), and above-mentioned diaphragm (7) is pressed between two compressing tablets (14).
3. a kind of reduction valve according to claim 1 and 2 is characterized in that, is fixed with guide cylinder (15) on the described balance housing (6), and above-mentioned connecting rod (12) middle part is positioned at guide cylinder (15) upward and between is provided with seal ring (16).
4. a kind of reduction valve according to claim 1 and 2, it is characterized in that, be fixed with lower spring cup (17) on the described guide cylinder (15), described connecting rod (12) the upper end upper spring seat (18) that has been threaded, the two ends of above-mentioned spring (13) act on respectively on upper spring seat (18) and the lower spring cup (17).
5. a kind of reduction valve according to claim 4 is characterized in that, described upper spring seat (18) comprises the screw (18a) that is threaded with connecting rod (12) and is plate-like and is enclosed within positioning disk (18b) on the screw (18a).
6. a kind of reduction valve according to claim 1 and 2, it is characterized in that, the upper cover of valve rod (5) has Returnning spring (20), the two ends of Returnning spring (20) to act on respectively gear and has upward and at the elastic force effect lower valve core (4) of Returnning spring (20) along (19) and valve body (1) and move and make valve be in the trend of opening state.
7. a kind of reduction valve according to claim 1 and 2, it is characterized in that, described balance housing (6) bottom is fixed with the joint one (21) that is tubular and has protrusion catch (21a) outside it, described valve body (1) top has the tubular of being and the threaded joint two (22) of its outside tool, and a nut (11) is threaded in joint two (22) shades upper and nut (11) and is pressed on the above-mentioned catch (21a).
8. a kind of reduction valve according to claim 7, it is characterized in that, described joint one (21) sidepiece has the recessed locating slot (23) of annular one, and above-mentioned catch (21a) is positioned at that locating slot (23) is located and its part is stretched out joint one (21) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210431121.2A CN102913654B (en) | 2012-11-01 | 2012-11-01 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210431121.2A CN102913654B (en) | 2012-11-01 | 2012-11-01 | Pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913654A true CN102913654A (en) | 2013-02-06 |
| CN102913654B CN102913654B (en) | 2014-08-13 |
Family
ID=47612152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210431121.2A Expired - Fee Related CN102913654B (en) | 2012-11-01 | 2012-11-01 | Pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102913654B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061811A (en) * | 2016-12-26 | 2017-08-18 | 马勒技术投资(中国）有限公司 | Diaphragm protection device and the pressure regulator valve provided with diaphragm protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229019Y (en) * | 1994-12-17 | 1996-06-12 | 鞍山自控仪表(集团)股份有限公司 | Self-force pressure regulating valve |
| CN200949691Y (en) * | 2006-09-05 | 2007-09-19 | 浙江派沃自控仪表有限公司 | Self-forcing pressure regulating valve |
| CN200949690Y (en) * | 2006-09-05 | 2007-09-19 | 浙江派沃自控仪表有限公司 | Self-forcing corrosion resistant pressure regulating valve |
| CN101655168A (en) * | 2009-09-09 | 2010-02-24 | 陈保春 | Self-contained pressure transmitting and reducing valve for corrugated pipe |
| US20100294970A1 (en) * | 2009-05-21 | 2010-11-25 | Cla-Val Co. | Pressure management control valve assembly |
| CN202972082U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Reducing valve |
-
2012
- 2012-11-01 CN CN201210431121.2A patent/CN102913654B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229019Y (en) * | 1994-12-17 | 1996-06-12 | 鞍山自控仪表(集团)股份有限公司 | Self-force pressure regulating valve |
| CN200949691Y (en) * | 2006-09-05 | 2007-09-19 | 浙江派沃自控仪表有限公司 | Self-forcing pressure regulating valve |
| CN200949690Y (en) * | 2006-09-05 | 2007-09-19 | 浙江派沃自控仪表有限公司 | Self-forcing corrosion resistant pressure regulating valve |
| US20100294970A1 (en) * | 2009-05-21 | 2010-11-25 | Cla-Val Co. | Pressure management control valve assembly |
| CN101655168A (en) * | 2009-09-09 | 2010-02-24 | 陈保春 | Self-contained pressure transmitting and reducing valve for corrugated pipe |
| CN202972082U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Reducing valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061811A (en) * | 2016-12-26 | 2017-08-18 | 马勒技术投资(中国）有限公司 | Diaphragm protection device and the pressure regulator valve provided with diaphragm protection device |
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| Publication number | Publication date |
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| CN102913654B (en) | 2014-08-13 |
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Granted publication date: 20140813 Termination date: 20171101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |