CN111306354A - Lifting type check valve capable of reducing water hammer damage - Google Patents
Lifting type check valve capable of reducing water hammer damage Download PDFInfo
- Publication number
- CN111306354A CN111306354A CN202010267385.3A CN202010267385A CN111306354A CN 111306354 A CN111306354 A CN 111306354A CN 202010267385 A CN202010267385 A CN 202010267385A CN 111306354 A CN111306354 A CN 111306354A
- Authority
- CN
- China
- Prior art keywords
- check valve
- valve
- small
- water hammer
- hollow plug
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000006378 damage Effects 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 230000000116 mitigating effect Effects 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
- B01D35/046—Plug, tap, or cock filters filtering elements mounted in or on a faucet the filtering element being mounted in the faucet plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
Abstract
A lifting type check valve capable of reducing water hammer hazards comprises a valve body, a valve seat, a valve cover, a bushing, a valve core, a compression spring, a sealing element and a connecting piece. The characteristics are as follows: a small check valve sealed by a small steel ball is arranged in the sealing end of the lifting check valve core. The small check valve is formed by taking the sealing end of the valve core of the lifting check valve as a valve body and adding an outer hexagonal hollow plug and a small steel ball. An inner hexagonal hollow plug and a filter screen are also arranged at the inlet of the small check valve. When water hammer occurs, the pressure is relieved through the small check valve, so that the water hammer phenomenon and damage are reduced; compared with other measures for preventing and relieving water hammer, the method has the advantages of not increasing the volume of the original equipment or pipeline and having the lowest cost.
Description
Technical Field
The present invention relates to a check valve in an industrial machine, a fluid device or a pipeline.
Background
In fluid equipment such as petrochemical industry, steam power generation, water supply and drainage and the like, the phenomena of flow speed change and pressure fluctuation inevitably exist; particularly, in a fluid device or a pipeline in which the check valve is installed, a water hammer phenomenon caused by the sudden closing of the check valve is inevitable. The abnormal pressure generated by water attack has a great influence on equipment or pipelines, and can cause severe vibration and deformation if the abnormal pressure is light and cause damage and accidents of parts if the abnormal pressure is heavy. Although people can adopt measures of additionally installing a safety valve, an exhaust valve, a drain valve or an energy accumulator, shortening or thickening a pipeline, slowly opening and closing a valve and the like in equipment or a pipeline to reduce the phenomenon and the harm of water hammer; however, implementation of the above measures is limited by a number of objective factors and can significantly increase the manufacturing cost of the device or the pipeline. Therefore, technical measures are adopted in the check valve, and the method is the most direct and effective method for reducing cost and harm.
Disclosure of Invention
The invention aims to provide a lifting type check valve which is simple in structure, economical and practical and can reduce water hammer damage.
The invention includes valve body, valve base, valve cover, bush, valve core, compression spring and used seal, link, its characteristic is: a small check valve sealed by a small steel ball is arranged in the sealing end of the lifting check valve core.
The small check valve sealed by the small steel ball is formed by taking the sealing end of the valve core of the lifting check valve as a valve body and adding an outer hexagonal hollow plug and the small steel ball.
An inner hexagonal hollow plug and a filter screen are also arranged at the inlet of the small check valve.
Because the small check valve sealed by the small steel ball is arranged in the sealing end of the lifting type check valve core; when the lifting type check valve is closed due to sudden change of fluid pressure, under the action of inertia, energy of liquid flowing in an original pipeline is concentrated to the lifting type check valve, a water hammer phenomenon is generated, the fluid pressure is several times of the fluid pressure of normal working pressure, if the valve core of the lifting type check valve cannot be pushed open for pressure relief, a small steel ball in the valve core can be pushed open, pressure relief is achieved through the small check valve, the water hammer phenomenon and damage are reduced, and the check valve and equipment or a pipeline where the check valve is located are prevented from being damaged. When the water hammer phenomenon disappears, the lifting type check valve still keeps the original working state.
If the liquid in the equipment or pipeline contains impurities which are not uniform or have larger particles, a filter screen is additionally arranged at the inlet of the small check valve to prevent the small check valve from being blocked.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is an enlarged schematic view of the small check valve of FIG. 1 at A according to the present invention;
FIG. 3 is a view of the components of the small check valve of the present invention: the inner end of the outer hexagonal hollow plug is projected in an axial direction to be enlarged.
The part names indicated by reference numerals in the drawings are as follows:
1. the valve comprises a valve body, 2, a valve seat, 3, a stud, 4, a nut, 5, a sealing gasket ring, 6, a valve cover, 7, a lining, 8, a valve core, 9, a compression spring, 10, an outer hexagonal hollow plug, 11, an O-shaped sealing ring, 12, a small steel ball, 13, an inner hexagonal hollow plug, 14 and a filter screen.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
the invention is composed of a common high pressure resistant lifting type check valve in petroleum and natural gas drilling and production equipment and a small check valve which is added in the sealing end of a valve core 8 of the lifting type check valve and is sealed by a small steel ball 12; normally, an inner hexagonal hollow plug 13 and a filter screen 14 are also arranged at the inlet of the small check valve.
The invention relates to a lifting type check valve, which comprises special parts: valve body 1, disk seat 2, valve gap 6, bush 7, case 8 and compression spring 9, the sealing member: gasket ring 5 and O-ring 11, coupling: a stud 3 and a nut 4. The valve body 1 is a three-way part, the middle part is a cylinder, and the left end and the right end extend out to form a flange with a neck which is connected with the outside; the middle column body is internally provided with a blind hole valve cavity consisting of an upper cylindrical hole, a transitional taper hole and a lower cylindrical hole from top to bottom in sequence, and the upper end surface of the middle column body is provided with a trapezoidal gasket ring groove and uniformly distributed threaded blind holes which are connected with a valve cover 6; the center of the flange with neck at the left end and the right end is respectively provided with a left flow passage hole and a right flow passage hole which are communicated with a lower cylindrical hole and an upper cylindrical hole of the valve cavity, and the two end surfaces of the flange are respectively provided with a trapezoidal gasket ring groove and uniformly distributed bolt holes for external connection. The valve seat 2 is made of corrosion-resistant and wear-resistant hard alloy materials and is welded on a transitional taper hole in the valve cavity of the valve body 1, and the wall thickness after processing is larger than 2mm, so that the service life and the effect of the valve seat are ensured. The valve cover 6 is the same as the valve cover part of the existing lifting type check valve and is a blind flange-shaped part; the edges of the upper and lower surfaces are uniformly distributed and run through cylindrical holes so as to connect the valve body 1 by a stud bolt 3 and a nut 4; the middle of the lower surface of the circular truncated cone is provided with a convex circular truncated cone, the center of the circular truncated cone is provided with a stepped blind hole for connecting the bushing 7, the valve core 8 and the compression spring 9, and the conical surface of the circular truncated cone is provided with an exhaust hole communicated with the upper end of the stepped blind hole; the periphery of the circular truncated cone is provided with a trapezoidal gasket ring groove, and a sealing gasket ring 5 shared with the valve body 1 is arranged in the groove. The upper end of the valve core 8 is a smooth cylinder and is inserted into the inner ring of the compression spring 9 and a blind hole below the valve cover 6 for guiding; the lower end of the valve core 8 is provided with two right and left truncated cone combinations with a first step, which are called as follows: sealing the end; the step is used for preventing the compression spring 9 from deviating, the forward round table is used for facilitating machining and mounting of the small check valve, and the reverse round table is used for sealing with a taper hole of the valve seat 2; a dovetail groove is further processed on the conical surface of the reverse circular truncated cone, and an O-shaped sealing ring 11 is arranged in the dovetail groove to enhance the sealing effect of the valve core 8 and the valve seat 2.
The small check valve is formed by taking the sealing end of a valve core 8 of a lifting check valve as a valve body and adding an outer hexagonal hollow plug 10 and a small steel ball 12. The outer hexagonal hollow plug 10 is provided with a flat hexagon and a tool withdrawal groove at the outer end, a longer screw column body at the inner end and a through cylindrical hole at the center; symmetrical drainage grooves are cut on the inner end surface of the outer hexagonal hollow plug 10. The inlet of the small check valve is positioned at the central part of the lower end surface of the valve core 8, the outlet is positioned on the conical surface of the forward circular table of the valve core 8, and the inlet hole and the outlet hole are intersected and communicated. The inlet hole is a threaded hole, a tool withdrawal groove, a chamfer and an intersection hole from outside to inside in sequence; the filter screen 14 is arranged in the tool withdrawal groove and is fixed by an inner hexagonal hollow plug 13; the size of the pores of the filter screen 14 can be determined according to the medium condition in the valve and the pore size of the small check valve; under the conditions of pure medium and large aperture of the small check valve, the inner hexagonal hollow plug 13, the filter screen 14 and the mounting hole thereof can be omitted so as to reduce the cost. The outlet hole is a spot-facing hole, a threaded hole, a cylindrical hole, a taper hole and an intersection hole in sequence from outside to inside and from large to small in diameter; the small steel ball 12 is arranged at the cylindrical hole and the conical hole for draining or sealing; the outer hexagonal hollow plug 10 is arranged at the spot facing hole and the threaded hole to prevent the small steel ball 12 from sliding out.
The general configuration shown in fig. 1 is a preferred embodiment of the present invention, but is not limited thereto, the included angle α between the axes of the inlet and outlet ports of the small check valve of the present invention is set to be 45-90 °, and the shape of the forward truncated cone of the sealing end of the spool 8 varies with the included angle α, which has no significant effect on the performance of the lifting check valve and the small check valve, and any other changes to the structure and shape of the components of the lifting check valve without departing from the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a can alleviate over-and-under type single current valve of water hammer harm, includes valve body, disk seat, valve gap, bush, case, compression spring and used sealing member, connector, characterized by: a small check valve sealed by a small steel ball is arranged in the sealing end of the lifting check valve core.
2. The liftable check valve capable of mitigating water hammer hazards, according to claim 1, wherein: the small check valve is formed by taking the sealing end of the valve core of the lifting check valve as a valve body and adding an outer hexagonal hollow plug and a small steel ball.
3. The liftable check valve capable of mitigating water hammer hazards as set forth in claim 2, wherein: the outer end of the outer hexagonal hollow plug is provided with a flat hexagon and a tool withdrawal groove, the inner end of the outer hexagonal hollow plug is provided with a longer screw cylinder, and the center of the inner hexagonal hollow plug is provided with a through cylindrical hole; symmetrical drainage grooves are cut on the inner end surface of the outer hexagonal hollow plug.
4. The liftable check valve capable of mitigating water hammer hazards, according to claim 1, wherein: an inner hexagonal hollow plug and a filter screen are also arranged at the inlet of the small check valve.
5. The liftable check valve capable of reducing the damage of water hammer as claimed in claim 1, wherein the axial angle α between the inlet and outlet ports of the small check valve is set to be 45-90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267385.3A CN111306354A (en) | 2020-04-02 | 2020-04-02 | Lifting type check valve capable of reducing water hammer damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267385.3A CN111306354A (en) | 2020-04-02 | 2020-04-02 | Lifting type check valve capable of reducing water hammer damage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111306354A true CN111306354A (en) | 2020-06-19 |
Family
ID=71155790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010267385.3A Pending CN111306354A (en) | 2020-04-02 | 2020-04-02 | Lifting type check valve capable of reducing water hammer damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111306354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483978A (en) * | 2021-12-28 | 2022-05-13 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Sealing valve structure with reverse pressure relief function |
-
2020
- 2020-04-02 CN CN202010267385.3A patent/CN111306354A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483978A (en) * | 2021-12-28 | 2022-05-13 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Sealing valve structure with reverse pressure relief function |
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