CN2481931Y - Constant-pressure valve - Google Patents
Constant-pressure valve Download PDFInfo
- Publication number
- CN2481931Y CN2481931Y CN 01225305 CN01225305U CN2481931Y CN 2481931 Y CN2481931 Y CN 2481931Y CN 01225305 CN01225305 CN 01225305 CN 01225305 U CN01225305 U CN 01225305U CN 2481931 Y CN2481931 Y CN 2481931Y
- Authority
- CN
- China
- Prior art keywords
- thimble
- push rod
- spring
- valve seat
- valve
- 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
Links
Abstract
The utility model relates to a constant pressure valve, which structurally comprises a valve seat, a valve cover, an end cover, an adjusting screw, an elastic diaphragm, a push rod, a push rod spring, a supporting sleeve, a gasket, a push needle and a push needle spring. The utility model is characterized in that the clearance between the gasket and the push needle is cone shaped, the pressure of the outlet sample water of the constant pressure valve is more stable and reliable, and the setting of the pressure of the outlet sample water of the constant pressure valve is easier by adjusting the end cover; the gasket is made of high strength teflon, thereby being more wear resistant, and prolonging the service life. The constant pressure valve has reasonable structure and convenient operation.
Description
The utility model relates to a kind of water and steam sampling device that is used for, and the pressure of water and steam sampling device inner cryogenic sample water can be kept invariable constant pressure valve.
Before the utility model is made, existing constant pressure valve is by valve seat, valve gap, end cap, adjusting screw, flexible sheet, push rod, push rod spring, supporting sleeve, packing ring, thimble and thimble spring are formed, the valve seat lower end is provided with sample water inlet and outlet, cylindrical supporting sleeve is installed in valve seat central authorities, in the cavity that supporting sleeve lower end and valve seat form thimble is installed, thimble spring and packing ring, packing ring is made by rubber, the centre has cylindrical hole, push rod is installed in the supporting sleeve upper end, the supporting sleeve upper side is provided with an aperture and is communicated with cavity between the flexible sheet with valve seat, flexible sheet is installed in the cavity between valve seat and the valve gap, push rod spring and adjusting screw are installed in the valve gap cavity, and end cap and adjusting screw are fixed.Under the effect of push rod spring and thimble spring, flexible sheet, push rod and thimble all are in the stressed state that holds out against, thimble upper end cylindrical body stretches into the rubber washer endoporus, form cylindrical gap, the ratio of push rod spring and thimble the elastic coefficient is greater than 10, and the ratio of flexible sheet area and thimble sectional area is greater than 10.During constant pressure valve work, thimble and push rod stressed equating, be in the equilibrium of forces state, when import sample water pressure fluctuates, rebulid equilibrium of forces between thimble and the push rod, along with thimble and push rod move up and down, the gap between thimble upper end cylindrical body and the packing ring endoporus changes, so the pressure of constant pressure valve outlet sample water is controlled by the cylindrical gap between thimble and the packing ring.In addition, because thimble and push rod stressed equating, pressure above the thimble multiply by the addition of flexible sheet area two-part by sample water pressure in the elastic force of push rod spring and the outlet cavity, pressure below the push rod multiply by the addition of thimble sectional area two-part by sample water pressure in the elastic force of thimble spring and the inlet cavity, again since the ratio of push rod spring and thimble the elastic coefficient greater than 10, the ratio of flexible sheet area and thimble sectional area is greater than 10, so when import sample water pressure changes, the changing value of outlet sample water pressure is much smaller than the changing value of import sample water pressure, thereby the variation of constant pressure valve outlet sample water pressure is very little, is similar to constant.In the process of using this constant pressure valve, the manual tune end cap, when setting constant pressure valve outlet sample water pressure, because the gap between thimble upper end cylindrical body and the packing ring endoporus is cylindrical, little, the poor stability of the pressure controlled scope of sample water outlet.
The purpose of this utility model provides a kind of rational in infrastructure, regulates more convenient more reliable constant pressure valve.
The structure of the constant pressure valve that the utility model proposes comprises valve seat, valve gap, end cap, adjusting screw, flexible sheet, push rod, push rod spring, supporting sleeve, packing ring, thimble and thimble spring, the valve seat lower end is provided with sample water inlet and outlet, cylindrical supporting sleeve is installed in valve seat central authorities, in the cavity that supporting sleeve lower end and valve seat form thimble is installed, thimble spring and packing ring, push rod is installed in the supporting sleeve upper end, the supporting sleeve upper side is provided with an aperture and is communicated with cavity between the flexible sheet with valve seat, flexible sheet is installed in the cavity between valve seat and the valve gap, push rod spring and adjusting screw are installed in the valve gap cavity, end cap and adjusting screw are fixed, under the effect of push rod spring and thimble spring, flexible sheet, push rod and thimble all are in the stressed state that holds out against, the ratio of push rod spring and thimble the elastic coefficient is greater than 10, the ratio of flexible sheet area and thimble sectional area is greater than 10, it is characterized in that packing ring adopts teflon to make, central bore is a round taper hole, and tapering is 60 °; The thimble upper end is conical, and tapering is 60 °, and the thimble cone height is identical with the packing ring taper hole degree of depth.
The constant pressure valve that the utility model proposes is rational in infrastructure, and is easy to operate.In normal working, sample water enters supporting sleeve lower end cavity from the import of valve seat lower end, the conical gap that sample water forms by packing ring endoporus and thimble upper end enters supporting sleeve upper end cavity, enter cavity between valve seat and the flexible sheet by supporting sleeve side aperture again, flow out from the outlet of valve seat lower end at last.Because the gap between packing ring and the thimble is conical, confirm that through test the pressure of constant pressure valve outlet sample water is more stable more reliable, regulate the pressure of the easier setting constant pressure valve outlet of end cap sample water.In addition, more wear-resisting because packing ring adopts high-strength polytetrafluoroethyl-ne to make, prolonged working life.
Followingly concrete enforcement of the present utility model is further described with reference to accompanying drawing.Shown in Figure 1 is the structural drawing of this constant pressure valve, and shown in Figure 2 is the thimble of this constant pressure valve and the enlarged view of packing ring part.
The structure of this constant pressure valve comprises valve seat 1, valve gap 2, end cap 3, adjusting screw 5, flexible sheet 9, push rod 6, push rod spring 4, supporting sleeve 8, packing ring 7, thimble 10 and thimble spring 11, valve seat 1 lower end is provided with sample water inlet and outlet, cylindrical supporting sleeve 8 is installed in valve seat 1 central authorities, in the cavity that supporting sleeve 8 lower ends and valve seat 1 form thimble 10 is installed, thimble spring 11 and packing ring 7, push rod 6 is installed in supporting sleeve 8 upper ends, supporting sleeve 8 upper side are provided with an aperture and are communicated with cavity between the flexible sheet 9 with valve seat 1, flexible sheet 9 is installed in the cavity between valve seat 1 and the valve gap 2, push rod spring 4 and adjusting screw 5 are installed in valve gap 2 cavitys, end cap 3 is fixing with adjusting screw 5, under the effect of push rod spring 4 and thimble spring 11, flexible sheet 9, push rod 6 all is in the stressed state that holds out against with thimble 10, the ratio of push rod spring 4 and thimble spring 11 elasticity coefficient is greater than 10, the ratio of flexible sheet 9 areas and thimble 10 sectional areas is greater than 10, it is characterized in that packing ring 7 adopts teflon to make, central bore is a round taper hole, and tapering is 60 °; Thimble 10 upper ends are conical, and tapering is 60 °, and thimble 10 cone height are identical with the packing ring 7 taper hole degree of depth.
Claims (1)
- The structure of the constant pressure valve that the utility model proposes comprises valve seat, valve gap, end cap, adjusting screw, flexible sheet, push rod, push rod spring, supporting sleeve, packing ring, thimble and thimble spring, the valve seat lower end is provided with sample water inlet and outlet, cylindrical supporting sleeve is installed in valve seat central authorities, in the cavity that supporting sleeve lower end and valve seat form thimble is installed, thimble spring and packing ring, push rod is installed in the supporting sleeve upper end, the supporting sleeve upper side is provided with an aperture and is communicated with cavity between the flexible sheet with valve seat, flexible sheet is installed in the cavity between valve seat and the valve gap, push rod spring and adjusting screw are installed in the valve gap cavity, end cap and adjusting screw are fixed, under the effect of push rod spring and thimble spring, flexible sheet, push rod and thimble all are in the stressed state that holds out against, the ratio of push rod spring and thimble the elastic coefficient is greater than 10, the ratio of flexible sheet area and thimble sectional area is greater than 10, it is characterized in that packing ring adopts teflon to make, central bore is a round taper hole, and tapering is 60 °; The thimble upper end is conical, and tapering is 60 °, and the thimble cone height is identical with the packing ring taper hole degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01225305 CN2481931Y (en) | 2001-05-17 | 2001-05-17 | Constant-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01225305 CN2481931Y (en) | 2001-05-17 | 2001-05-17 | Constant-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2481931Y true CN2481931Y (en) | 2002-03-13 |
Family
ID=33641389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01225305 Expired - Lifetime CN2481931Y (en) | 2001-05-17 | 2001-05-17 | Constant-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2481931Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
-
2001
- 2001-05-17 CN CN 01225305 patent/CN2481931Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
| CN105352711B (en) * | 2015-11-02 | 2018-03-02 | 浙江利永达制冷机械有限公司 | A kind of constant pressure valve and its detection means and detection method |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110517 Granted publication date: 20020313 |
|
| DD01 | Delivery of document by public notice |
Addressee: Huaneng Instrument Control Co., Ltd., Suzhou Document name: Notification of Expiration of Patent Right Duration |