CN2087270U - Pressure valve - Google Patents
Pressure valve Download PDFInfo
- Publication number
- CN2087270U CN2087270U CN 91204818 CN91204818U CN2087270U CN 2087270 U CN2087270 U CN 2087270U CN 91204818 CN91204818 CN 91204818 CN 91204818 U CN91204818 U CN 91204818U CN 2087270 U CN2087270 U CN 2087270U
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- CN
- China
- Prior art keywords
- valve
- pressure
- seat
- valve body
- spring
- 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 - Lifetime
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Abstract
The utility model relates to a pressure control valve, comprising the main components of a valve body, a pressure adjusting spring, a spring shield, a valve core, a valve seat, etc. The pressure control valve is characterized in that a sliding valve is designed to be connected with the thread pipe of the valve core by a thread. A valve core pad is embedded inside the valve core, and the valve core pad and the spring of the valve core are tightly pressed on the valve seat by the spring seat of the valve core. The valve seat is tightly pressed inside the bottom hole of the valve body by an outlet joint. The gap of the sliding valve and the valve body, and the main connecting part adopt O-shaped rings to be sealed. The pressure control valve has compact structure, high sensitivity, and convenient maintenance. The pressure control valve can be used for small and medium size experimental devices and a liquid pressure transmission mechanism to be used as a backpressure valve for stabilizing the fluid pressure of the upper stream of a system.
Description
The utility model belongs to a kind of pressure controlled valve, and or rather, it is the back pressure valve of a kind of Control work system upstream fluid pressure stability.
On the medium and small experimental setup of petrochemical industry and in the fluid drive mechanism, the present back pressure valve that uses, its actuator is mainly bellow type, diaphragm type and piston cylinder operator.The back pressure valve of bellow type is because the restriction of processing, material and the bearing capacity thereof of bellows generally is only applicable in the lower system of free from corrosion medium and pressure.The more diaphragm type back pressure valve that is to use in the petrochemical industry experimental setup, pressure controlled valve (" petrochemical industry " as YK-05, YK-06 type, 11(10), 693,1982), though this type of valve is simple in structure, sealing is reliable, sensitivity is higher, but diaphragm easy deformation when installing, and diaphragm also is subject to Temperature Influence and is out of shape in the course of the work; For satisfying the requirement of sensitivity, the valve body structure size design gets very big; In addition, this type of valve is because the restriction of diaphragm intensity, in only being suitable for, low service system.Back pressure valve in the form of piston can overcome more above-mentioned shortcomings, and can select different sealings, valve core material and form for use, under higher temperature and pressure, use, as Tescom26-1700 type back pressure valve, (seeing product descritption, From No.1335 10/87 J-COMP Printed in U.S.A), but this valve arrangement complexity, difficulty of processing is bigger, and maintenance is inconvenient, and physical dimension is bigger.
The purpose of this utility model is some shortcomings that overcome above-mentioned back pressure valve, and a kind of compact structure is provided, and processes easy to maintenancely, highly sensitive, and can be applicable to the pressure controlled valve of high, medium and low pressing system.
For achieving the above object, the utility model is realized by following proposal: actuator design is become a kind of guiding valve, and guiding valve can slide at body cavity, because guiding valve is more much smaller than diaphragm, and can be high pressure resistant, thus the physical dimension of valve is reduced, and can in high-pressure system, use; The guiding valve bottom connects with the spool screwed pipe by screw thread, the spool pad is embedded in the spool and by the valve core spring seat and is pressed on the valve seat, valve seat is pressed in the bottom outlet of valve body by outlet connection, this structure makes that replacing valve seat and seal ring easy to wear are very convenient, as long as it is promptly replaceable to turn on outlet connection; The valve interior surface that contacts with the O RunddichtringO is through fine gtinding, so frictional resistance is little, thereby improves the sensitivity of valve; Between the gap of guiding valve and valve body, valve seat and the valve body bottom outlet, the connection place of inlet attack and valve body all adopts the sealing of O type circle, improved the sealing of valve.
Describe structure of the present utility model in detail below in conjunction with accompanying drawing:
Accompanying drawing is the structure sectional view of back pressure valve.
By accompanying drawing as can be known, handwheel (8) is fixed on the screw rod (7) by screw (9), screw rod is spun in the tapped hole on spring shield (12) top, the bottom of screw rod (7) contacts with last pressure block (10) all the time by steel ball (6), and pressure adjusting spring (11) is limited to the centre of spring shield (12) inner chamber by last pressure block (10) and following pressure block (5); Spring shield (12) is fixed on the valve body (2) by screw thread, and following pressure block (5) center portion is pressed on the umbo place on guiding valve (13) top; The bottom of guiding valve (13) is by scyewed joint spool screwed pipe (17), and spool pad (19) is embedded in the spool (18) and is pressed on the valve seat (21) by valve core spring seat (15) and valve core spring (16); Valve seat (21) is pressed in the bottom outlet of valve body (2) by outlet connection (1); Go into, outlet connection (3,1) and valve body pass through scyewed joint; Between the gap of guiding valve (13) and valve body (2), valve seat (21) and valve body (2), the point of attachment of inlet attack (3) and valve body (2) is O type circle (14,20,4) sealing.
Described valve body (2), guiding valve (13), valve seat (21) material are copper or the stainless steel that comprises 1Cr18Ni9Ti, and the material of miscellaneous part is carbon steel, copper or stainless steel.
Described O shape circle can select for use materials such as oil resistant rubber, fluorine rubber, silicone rubber to make according to working medium and requirement.Described spool pad (19) material can be a fluorine rubber.
Described guiding valve (13), its protruding part are a cambered surface, act on all the time on guiding valve (13) central axis with assurance power, and guiding valve (13) should guarantee that with the gap length of valve body (2) guiding valve (13) can be free to slide in valve body (2).
Described pressure adjusting spring (11) can require to select different springs for use according to pressure medium, preferably selects proportional spring for use; This back pressure valve can use at 0.1～25MPa.
The aperture of described valve seat (21) mouth can be greatly as the pore size of media that viscosity is high with different change of character, state of medium.
Described valve body (2) internal surface that contacts with O type circle (14), through fine gtinding, the therefore sensitivity that has improved valve.
Described spool screwed pipe (17) has side opening, and purpose makes the inside and outside pressure medium of spool screwed pipe (17) keep identical, and the size of side opening determines according to the viscosity of medium, the diameter 1～3mm in general hole, and the quantity in hole is more than 2.
The degree of depth decision spool (18) of the screw-in guiding valve (13) of described valve core spring (16) and spool screwed pipe (17) and the pressure of spool pad (19) shutoff valve seat (21) mouth, this pressure is unsuitable excessive, the excessive working life that will reduce spool pad (19), even make its destruction; Also unsuitable too small, the too small requirement that does not reach sealing.The degree of depth of precession simultaneously also influences the sensitivity of valve.
Back pressure valve working procedure of the present utility model: test medium enters valve body (2) inner chamber by pipeline, inlet attack (3), the pressure medium of inner chamber reaches the pressure of system very soon, the total pressure that acts on guiding valve (13) when this pressure greater than pressure adjusting spring (11) to the pressure of guiding valve (13) and O type circle (14) during with surface friction drag that valve body (2) contacts, guiding valve (13) begins upwards to slide, and pull-up spool screwed pipe (17), spool (18) and spool pad (19), valve seat (21) mouth is opened immediately, and medium just overflows from valve seat (21) mouth; After valve seat (21) mouth is opened, rotation hand wheel (8) immediately, drive screw rod (7) passes through steel ball (6), upward pressure block (10) imposes on spring (11) pressure, pressure block (15) central role was on guiding valve (13) top under elastic force passed through again, guiding valve is got back on the position of spool pad (19) shutoff valve seat (21) mouth, and the pressure of Regulation spring (11) system decides according to the pressure of the required maintenance of system media; After the elastic force of pressure adjusting spring (11) is set up, pressure adjusting spring (11) acts on the power of guiding valve (13) and total power that pressure medium acts on guiding valve (13) is in state of equilibrium at any time, be that system pressure has increase slightly, guiding valve (13) will be gone up cunning, valve seat (21) mouth is opened, when medium one releases, pressure medium in the valve pocket descends immediately, total power that medium acts on guiding valve (13) also just reduces, so the pressure of pressure adjusting spring (11) makes guiding valve (13) get back to original position again, spool pad (19) is sealed up valve seat (21) mouth again, and the pressure of system media is remained on again under the desired pressure state.
Claims (3)
1, a kind of pressure controlled valve, comprise handwheel, screw rod, pressure adjusting spring, spring shield, last pressure block, following pressure block, valve body, spool, valve seat, it is characterized in that down pressure block (5) center be equipped with one with its guiding valve that closely contacts (13), guiding valve (13) connects with spool screwed pipe (17) by screw thread, spool pad (19) is embedded in the spool (18), and be pressed on the valve seat (21) by valve core spring seat (15) and valve core spring (16), valve seat (21) is pressed in the bottom outlet of valve body (2) by outlet connection (1), the gap of guiding valve (13) and valve body (2), between valve seat (21) and the valve body (2), inlet attack (3) is O type circle (14 with valve body (2) point of attachment, 20,4) sealing.
2,, it is characterized in that O type loop material comprises oil resistant rubber, fluorine rubber, silicone rubber according to the described pressure controlled valve of claim 1.
3,, it is characterized in that valve body (2), guiding valve (13), valve seat (21) material are copper or the stainless steel that comprises 1Cr18Ni9Ti according to the described pressure controlled valve of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91204818 CN2087270U (en) | 1991-04-01 | 1991-04-01 | Pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91204818 CN2087270U (en) | 1991-04-01 | 1991-04-01 | Pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2087270U true CN2087270U (en) | 1991-10-23 |
Family
ID=4914826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91204818 Expired - Lifetime CN2087270U (en) | 1991-04-01 | 1991-04-01 | Pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2087270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727079A (en) * | 2012-10-15 | 2014-04-16 | 北京精密机电控制设备研究所 | High-pressure small-drift-diameter high-precision slide-valve-type safety and overflow valve |
| WO2018176736A1 (en) * | 2017-03-31 | 2018-10-04 | 江苏汉邦科技有限公司 | Automatic back-pressure valve for use in supercritical fluid chromatographic system |
-
1991
- 1991-04-01 CN CN 91204818 patent/CN2087270U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727079A (en) * | 2012-10-15 | 2014-04-16 | 北京精密机电控制设备研究所 | High-pressure small-drift-diameter high-precision slide-valve-type safety and overflow valve |
| WO2018176736A1 (en) * | 2017-03-31 | 2018-10-04 | 江苏汉邦科技有限公司 | Automatic back-pressure valve for use in supercritical fluid chromatographic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |