CN102466066B - Film reducing valve - Google Patents
Film reducing valve Download PDFInfo
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- CN102466066B CN102466066B CN 201010543871 CN201010543871A CN102466066B CN 102466066 B CN102466066 B CN 102466066B CN 201010543871 CN201010543871 CN 201010543871 CN 201010543871 A CN201010543871 A CN 201010543871A CN 102466066 B CN102466066 B CN 102466066B
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- valve
- pressure
- valve body
- valve rod
- spring
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- 238000007667 floating Methods 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 28
- 239000012528 membrane Substances 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 229920001971 elastomer Polymers 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 208000019206 urinary tract infection Diseases 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- Lift Valve (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a film reducing valve which comprises an upper valve body (3), a lower valve body (9), an input pipe (15) and an output pipe (16), wherein the input pipe (15) and the output pipe (16) are arranged on the lower valve body (9) and used for inputting and outputting fluid medium; the film reducing valve is characterized in that the film reducing valve also comprises a floating valve plug assembly, wherein the floating valve plug assembly is arranged in a valve cavity formed by the upper valve body (3) and the lower valve body (9) and used for stabilizing the output pressure of the reducing valve; and a removable valve plug floating technology provided by the invention can markedly improve the voltage-stabilizing performance of the valve; in addition, the film reducing valve provided by the invention has the advantages that a flexible seal base is very firm and reliable, and the film reducing valve is durable in use.
Description
Technical Field
The invention relates to a film pressure reducing valve.
Background
The film pressure reducing valve is a pressure control element in a hydraulic system, can reduce the pressure in the hydraulic system to a required value, and is a product with wide application. The requirement of the current hydraulic system on the pressure stabilizing performance is increasing day by day, so that a new film pressure reducing valve is needed.
Disclosure of Invention
The invention aims to provide a film pressure reducing valve, which is also called a film pressure reducing valve.
The membrane valve provided by the invention is mainly used in the boiler-front oil system of the pulverized coal boiler of each thermal power plant in the power industry, and can conveniently reduce the pressure of the main oil way to the pressure required by each use point, thereby greatly simplifying the system and obviously reducing the cost.
The membrane pressure reducing valve comprises an upper valve body, a lower valve body, an input pipe and an output pipe, wherein the input pipe and the output pipe are arranged on the lower valve body and used for inputting and outputting fluid media.
Preferably, the floating valve plug assembly comprises a limiting valve rod, an upper pressure plate, a flexible membrane, a lower tray, a nut and a sealing seat, wherein the limiting valve rod, the upper pressure plate, the flexible membrane, the lower tray, the nut and the sealing seat are longitudinally arranged along the pressure reducing valve; the upper part of the limiting valve rod sequentially penetrates through the lower tray, the flexible diaphragm and the upper pressure plate, and a nut is screwed on the upper end of the limiting valve rod so as to clamp the lower tray, the flexible diaphragm and the upper pressure plate on the limiting valve rod together; the limiting valve rod is provided with a sealing seat, and the sealing seat and a medium input port of an input pipe on the lower valve body form a fluid medium flow regulating valve together.
Preferably, the floating valve plug assembly further comprises a spring seat, a pressure regulating spring, a plug and a return spring, wherein one end of the pressure regulating spring abuts against the lower surface of the spring seat and the other end of the pressure regulating spring abuts against the upper pressure plate, the plug is installed on the bottom of the lower valve body, and the return spring is installed in a groove of the plug; the sealing seat arranged at the lower end of the limiting valve rod is abutted against the reset spring, or the limiting valve rod and the sealing seat are designed into a whole, and the sealing seat is abutted against the reset spring as the lower end of the limiting valve rod.
Preferably, a through hole is provided on the top of the upper valve body, a pressure regulating screw is screwed into the through hole, and the lower end of the pressure regulating screw abuts against the upper surface of the spring seat.
Preferably, the limiting valve rod comprises an upper part, a middle part and a lower part, wherein a shoulder is arranged at the transition part from the upper part to the middle part, the lower tray is abutted against the shoulder, a hole, preferably a square hole, is arranged in the middle part, the center line of the hole is transverse to the longitudinal direction of the pressure reducing valve, the input pipe is inserted into the hole, and a certain gap is reserved between the input pipe and the hole.
Preferably, the flexible upper sealing surface of the sealing seat and the medium inlet of the inlet pipe together form a medium flow control valve. The bottom center of the hole in the middle of the limiting valve rod is provided with a screw hole, and a sealing seat is screwed in the screw hole.
Preferably, the flexible upper sealing surface of the sealing seat is made of a rubber pad, the rubber pad is placed into a groove which is coated with glue in advance at the top end of the sealing seat, and then the rubber pad is fixedly connected into the groove through a vulcanization method.
Preferably, the membrane pressure reducing valve further comprises a dust cap to prevent the medium from leaking outside.
The membrane type pressure reducing valve of the invention has the following beneficial effects:
the invention provides a movable valve plug floating technology, because the movable valve plug is positioned and supported by a diaphragm to form a floating support without other forced limiting points, the friction resistance of the movable valve plug during up-and-down movement is small, the diameter of the diaphragm is large, the hydraulic action on the diaphragm is very sensitive to the change of outlet pressure, and the pressure stabilizing performance of the valve is obviously improved.
The limiting valve rod structure can ensure that the limiting valve rod structure cannot rotate when being disassembled, so that the disassembly is very convenient, the up-and-down movement amount of the limiting valve rod is limited, and the diaphragm is prevented from being damaged due to overlarge displacement of the limiting valve rod during fault.
In addition, the flexible sealing seat adopted by the invention is very firm and reliable and is durable in use.
Drawings
The specific structure and operation of the valve according to the present invention will be described in detail with reference to the accompanying drawings and examples. Wherein,
FIG. 1 shows a longitudinal cross-sectional view of a diaphragm pressure relief valve according to one embodiment of the present invention;
FIG. 2 illustrates a side view of a diaphragm pressure relief valve in accordance with one embodiment of the present invention;
fig. 3 shows a longitudinal cross-sectional view C-C in fig. 1.
Detailed Description
Fig. 1 shows a longitudinal section through a membrane pressure reducing valve according to an exemplary embodiment of the present invention, and fig. 2 shows a side view of a membrane pressure reducing valve according to an exemplary embodiment of the present invention. According to the embodiment, the membrane pressure reducing valve comprises an upper valve body 3, a floating valve plug assembly (comprising a limiting valve rod 6, an upper pressure plate 7, a flexible diaphragm 8, a lower tray 13, a nut 14, a sealing seat 10 and the like), a lower valve body 9, an input pipe 15 and an output pipe 16. An inlet pipe 15 and an outlet pipe 16 are mounted on the lower valve body 9 for the inlet and outlet of a fluid medium, such as oil (the direction of flow of the fluid is indicated by the arrows in fig. 1). The floating valve plug assembly is installed in a valve cavity formed by the upper valve body 3 and the lower valve body 9 and used for stabilizing the output pressure of the pressure reducing valve.
According to this embodiment, the floating valve plug assembly comprises a limiting valve rod 6 arranged along the longitudinal direction of the pressure reducing valve, an upper pressure plate 7, a flexible diaphragm 8 (made of rubber for example), a lower tray 13, a nut 14 and a sealing seat 10. Wherein the central portion of the flexible diaphragm 8 is sandwiched between the upper pressure plate 7 and the lower tray 13, the upper valve body 3 and the lower valve body 9 are fixed together by, for example, bolts, and the peripheral portion of the flexible diaphragm 8 is sandwiched between the upper valve body 3 and the lower valve body 9; the upper part of the limiting valve rod 6 sequentially penetrates through the lower tray 13, the flexible diaphragm 8 and the upper pressure plate 7, and a nut 14 is screwed on the upper end of the limiting valve rod 6 so as to clamp the lower tray 13, the flexible diaphragm 8 and the upper pressure plate 7 on the limiting valve rod 6 together. The limit valve rod 6 is provided with a sealing seat 10 which forms a fluid medium flow regulating valve together with a medium input port 20 of an input pipe 15 on the lower valve body 9.
According to the variant of this embodiment, the floating valve plug assembly further comprises a spring seat 4, a pressure regulating spring 5, a plug 11 and a return spring 12, wherein the pressure regulating spring 5 abuts against the lower surface 4 of the spring seat at one end and the upper pressure plate 7 at the other end, the plug 11 is mounted on the bottom of the lower valve body 9, the return spring 12 is mounted in a groove 19 of the plug 11, and a seal seat 10 mounted at the lower end of the limiting valve rod 6 abuts against the return spring 12. Furthermore, a through hole 17 is provided in the top of the upper valve body in the longitudinal direction of the pressure reducing valve, and a pressure regulating screw 2 is screwed into this through hole 17, and the lower end of the pressure regulating screw 2 abuts on the upper surface of the spring seat 4. The pressure regulating screw 2 is used for regulating the pretightening force of the pressure regulating spring 5, so that the pressure exerted on the floating valve plug assembly by the pressure regulating spring 5 is regulated.
Medium pressure F of movable valve plug up under rubber diaphragm 8Liquid for treating urinary tract infectionAnd upward spring force F of return spring 12Compound medicineThe sum of the two and the downward elastic force F of the pressure regulating spring 5BulletThe upper and lower motion is realized under the action of the differential force, so that the opening degree of the regulating valve is changed. The instantaneous medium pressure drop delta P caused by the opening of the regulating valve enables the valve to have the functions of regulating pressure and stabilizing pressure.
In the floating technology of the movable valve plug, the floating valve plug component is positioned and supported by the diaphragm to form a floating support without other forced limiting points, so that the friction resistance of the floating valve plug during the up-and-down movement is small, moreover, the diameter of the diaphragm is large, the hydraulic action on the diaphragm is very sensitive to the change of the outlet pressure, and the pressure stabilizing performance of the valve can be obviously improved.
Fig. 3 shows a longitudinal section through a limiting valve rod 6 of a membrane pressure reducing valve according to an exemplary embodiment of the invention.
According to this embodiment, the check valve rod 6 comprises an upper part 61, a middle part 62 and a lower part 63, wherein a shoulder 64 is provided at the transition of the upper part 61 to the middle part 62, against which shoulder the lower tray 13 rests. Further, a hole (preferably a square hole) 65 is provided in the middle portion 62. In the assembled state of the membrane-type pressure-relief valve, the centre line X-X of this hole 65 is transverse, preferably perpendicular, to the longitudinal direction Y-Y of the pressure-relief valve. Can insert input tube 15 in this hole, leave certain clearance between input tube 15 and the hole 65, through the cartridge structure of input tube in the hole like this, just can guarantee that spacing valve rod 6 can not rotate when dismantling (dismantling nut 14 promptly), consequently dismantle very conveniently, the up-and-down amount of movement of spacing valve rod 6 receives the restriction moreover to because of spacing valve rod 6 displacement volume is too big when preventing the trouble and damaging the diaphragm.
Figure 3 also shows details of the flexible sealing seat 10 of the membrane pressure relief valve. According to this embodiment, a screw hole 18 is provided in the center of the bottom of the central hole of the check valve stem 6, and the seal holder 10 is screwed into this screw hole. The flexible upper sealing surface of the sealing seat 10 and the medium inlet 20 of the inlet pipe 15 attached to the lower valve body 9 form a medium flow control valve.
According to a variant of this embodiment, the flexible upper sealing surface of the seat 10 is for example of thickness
A rubber pad (e.g. oil resistant nitrile rubber) is placed in a corresponding pre-glued groove (preferably a dovetail groove) at the top of the seat 10 and then vulcanized to fixedly attach the pad in the groove. The sealing seat obtained in this way is very firm, reliable and durable.
According to a variant of this embodiment, the limiting valve rod 6 can be designed in one piece with the sealing seat 10, the sealing seat 10 resting as a lower end of the limiting valve rod 6 on a return spring.
In the present invention, the membrane pressure reducing valve may further include a dust cap 1 to prevent the medium from leaking (as shown in fig. 1 and 2).
The operating principle of the pressure reducing valve according to the invention is as follows:
it follows the following mechanical identity in operation, namely PInto＝ΔP+PGo outPressure P of valve front inletIntoIs a constant value, and PGo outThe value is manually set as desired. Typically, this value remains substantially constant once adjusted. But the actual flow of the medium after the valve is changed frequently, and then the adjustment action of delta P is used for ensuring PGo outBasically stable and unchanged, and even if the change is a little, the change is within an allowable range. For example, the flow of the valve outlet is suddenly increased, the opening of the regulating valve is not changed in time due to the inertia effect of the movable valve plug, so that the pressure of the valve outlet is instantaneously reduced, and FBullet＞FLiquid for treating urinary tract infection+FCompound medicineThe movable valve plug moves downwards, the opening degree of the adjusting valve is increased, the flow is increased, and the outlet pressure is restored to the original value. If the outlet flow is reduced, the movable valve plug is still in place and still does not move under the action of inertia, and the outlet pressure is increased instantaneously at the moment FLiquid for treating urinary tract infection+FCompound medicine＞FBulletWhich isThe difference in force forces the movable valve plug to move upward, the opening of the regulating valve is reduced, local pressure loss delta p caused by the throttle valve is instantly increased, and the outlet pressure is regulated to the original regulated value.
The inlet pressure of the pressure reducing valve is 3.0MPa, the outlet pressure is 0-1.4 MPa and is steplessly adjustable, the outlet pressure is 1.0MPa, the outlet flow is increased to 1400kg/h from 0, the maximum reduction amplitude of the outlet pressure is less than 0.1MPa, and the response speed of the outlet pressure is less than 0.2 second.
Claims (4)
1. A film pressure reducing valve comprises an upper valve body (3), a lower valve body (9), an input pipe (15) and an output pipe (16), wherein the input pipe (15) and the output pipe (16) are installed on the lower valve body (9) and used for inputting and outputting fluid media, and the film pressure reducing valve is characterized by further comprising a floating valve plug assembly, the floating valve plug assembly is installed in a valve cavity formed by the upper valve body (3) and the lower valve body (9) and used for stabilizing the output pressure of the pressure reducing valve, the floating valve plug assembly comprises a limiting valve rod (6), an upper pressure plate (7), a flexible membrane (8), a lower tray (13), a nut (14) and a sealing seat (10), the central part of the flexible membrane (8) is clamped between the upper pressure plate (7) and the lower tray (13), and the upper valve body (3) and the lower valve body (9) are fixedly connected together, the peripheral edge part of the flexible membrane (8) is clamped between the upper valve body (3) and the lower valve body (9); the upper part (61) of the limiting valve rod (6) sequentially penetrates through the lower tray (13), the flexible diaphragm (8) and the upper pressure plate (7), and a nut (14) is screwed on the upper end of the limiting valve rod (6), so that the lower tray (13), the flexible diaphragm (8) and the upper pressure plate (7) are clamped on the limiting valve rod (6) together; be equipped with seal receptacle (10) on spacing valve rod (6), seal receptacle (10) constitute fluid medium flow control valve together with medium input port (20) of input tube (15) on lower valve body (9), spacing valve rod (6) include upper portion (61), middle part (62) and lower part (63), wherein, be equipped with hole (65) in middle part (62), under the assembled state of diaphragm type pressure reducing valve, central line (X-X) of hole (65) become transversely with the vertical (Y-Y) of relief pressure valve, insert in this hole input tube (15), leave certain clearance between input tube (15) and hole (65).
2. The membrane pressure reducing valve according to claim 1, wherein the floating valve plug assembly further comprises a spring seat (4), a pressure regulating spring (5) and a plug (11), a return spring (12), wherein the pressure regulating spring (5) abuts against the lower surface of the spring seat (4) at one end and the upper pressure plate (7) at the other end, the plug (11) is mounted on the bottom of the lower valve body (9), and the return spring (12) is mounted in a groove (19) of the plug (11); the sealing seat (10) arranged at the lower end of the limiting valve rod (6) is abutted against the reset spring (12), or the limiting valve rod (6) and the sealing seat (10) are designed into a whole, and the sealing seat (10) is abutted against the reset spring as the lower end of the limiting valve rod (6).
3. The diaphragm pressure reducing valve according to claim 2, wherein a through hole (17) is provided in the top of the upper valve body (3), into which the pressure regulating screw (2) is screwed, and the lower end of the pressure regulating screw (2) abuts on the upper surface of the spring seat (4).
4. A membrane pressure relief valve according to any of claims 1 to 3, characterized in that it further comprises a dust cap (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010543871 CN102466066B (en) | 2010-11-15 | 2010-11-15 | Film reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010543871 CN102466066B (en) | 2010-11-15 | 2010-11-15 | Film reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102466066A CN102466066A (en) | 2012-05-23 |
| CN102466066B true CN102466066B (en) | 2013-06-19 |
Family
ID=46070032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010543871 Active CN102466066B (en) | 2010-11-15 | 2010-11-15 | Film reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102466066B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673903B (en) * | 2016-04-18 | 2018-04-13 | 黄幼华 | A kind of self-balancing valve |
| CN105650314B (en) * | 2016-04-18 | 2018-03-16 | 黄幼华 | A kind of self-operated type voltage stabilizing balanced valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076631U (en) * | 1990-11-14 | 1991-05-08 | 宁波埃美柯金属制品有限公司 | Pressure reducing valve |
| CN2665484Y (en) * | 2003-11-19 | 2004-12-22 | 马俊燕 | Branch pipe pressure-reducing valve |
| CN201884731U (en) * | 2010-11-15 | 2011-06-29 | 烟台龙源电力技术股份有限公司 | Film pressure reducing valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132479A (en) * | 1979-03-30 | 1980-10-15 | Tokico Ltd | Pressure control device |
| JP2002032130A (en) * | 2000-07-17 | 2002-01-31 | Yoshitake Inc | Pressure reducing valve |
-
2010
- 2010-11-15 CN CN 201010543871 patent/CN102466066B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076631U (en) * | 1990-11-14 | 1991-05-08 | 宁波埃美柯金属制品有限公司 | Pressure reducing valve |
| CN2665484Y (en) * | 2003-11-19 | 2004-12-22 | 马俊燕 | Branch pipe pressure-reducing valve |
| CN201884731U (en) * | 2010-11-15 | 2011-06-29 | 烟台龙源电力技术股份有限公司 | Film pressure reducing valve |
Non-Patent Citations (2)
| Title |
|---|
| JP昭55-132479A 1980.10.15 |
| JP特开2002-32130A 2002.01.31 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102466066A (en) | 2012-05-23 |
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