CN208041249U - Pilot-operated type booster shutoff valve - Google Patents
Pilot-operated type booster shutoff valve Download PDFInfo
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- CN208041249U CN208041249U CN201820111632.9U CN201820111632U CN208041249U CN 208041249 U CN208041249 U CN 208041249U CN 201820111632 U CN201820111632 U CN 201820111632U CN 208041249 U CN208041249 U CN 208041249U
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Abstract
The utility model discloses pilot-operated type booster shutoff valve, main valve is connected by connecting line with pilot valve；The pilot valve includes pilot valve body, the bottom of the pilot valve body is equipped with pilot valve end cap, the pilot valve body and pilot valve end cap constitute closed chamber, the closed chamber internal-internal is equipped with pilot valve spring and pilot valve spool, adjusting bolt is installed on the top of pilot valve body, the bottom end face of the adjusting bolt is in contact cooperation with the top of pilot valve spring；The bottom sides of the pilot valve body are machined with the first pilot valve trepanning, and the first pilot valve trepanning is connected with the water outlet side opening of main valve；The center of the pilot valve end cap is machined with pilot valve bottom opening, and pilot valve bottom opening is connected with the main valve trepanning of main valve；The second pilot valve trepanning being connected with air and third pilot valve trepanning are additionally provided on the side wall of the pilot valve body.This shutoff valve adapts to manifold pressure normal variation, and its operating pressure can be adjusted arbitrarily.
Description
Technical field
The utility model is related to a kind of shutoff valve, more particularly to a kind of pilot-operated type booster shutoff valve.
Background technology
Caused a large amount of fluids leakages will give the production and living of people along the line cause larger after the generation of pressure conduit booster
Loss.By itself control pilot-operated type booster shutoff valve can quick acting to fully closed, caused by pipeline leakage accident
Consequence is reduced to minimum influence, quadratic loss is reduced, to improve safety and the economy of pipe network.
Booster shutoff valve is quick detection and can to block a kind of device of fluid conveying after pressure conduit booster, fit
For a variety of water supply lines such as urban water supply engineering, industrial water-lifting engineering.The booster shutoff valve of pilot valve control does not need electric-controlled
System, and pilot valve is only relied on to the pressure of valve front and rear pipes as Rule of judgment, automatic realization valve is closed, and booster shadow is suitable for
Ring big, unattended, high degree of automation the occasion of needs.
Utility model patent：201310301183.6 booster shutoff valve is disclosed and a kind of is promptly blocked according to pressure change
The valve of flow.When pressure drops to certain numerical value after booster valve occurs for valve water outlet side one end, valve disc is pre-tightening
Under the action of spring, since inflow direction fluid impingement force gradually increases after closing, the power suffered by valve disc further increases, directly
It is fully closed to valve.Its shortcoming is that 1. adjustment pressure set points need while adjusting several spring compression bolts, Adjustment precision
It is low；2. for different nominal diameters, the booster shutoff valve of different pressures setting value needs to match the different spring of plurality of specifications,
Product seriation degree is low, and manufacturing cost is high.
Utility model content
The purpose of this utility model is to provide pilot-operated type booster shutoff valves, and it is normal that this shutoff valve adapts to manifold pressure
Variation, and its operating pressure can be adjusted arbitrarily.
In order to realize above-mentioned technical characteristic, what the purpose of this utility model was realized in：Pilot-operated type booster shutoff valve,
It includes main valve, and the main valve is connected by connecting line with pilot valve；
The pilot valve includes pilot valve body, and the bottom of the pilot valve body is equipped with pilot valve end cap, the pilot valve body and pilot valve end
Lid constitutes closed chamber, and the closed chamber internal-internal is equipped with pilot valve spring and pilot valve spool, pacifies on the top of pilot valve body
Equipped with adjusting bolt, the bottom end face of the adjusting bolt is in contact cooperation with the top of pilot valve spring；
The bottom sides of the pilot valve body are machined with the first pilot valve trepanning, the water outlet side of the trepanning of the first pilot valve and main valve
Trepanning is connected；
The center of the pilot valve end cap is machined with pilot valve bottom opening, the main valve trepanning of pilot valve bottom opening and main valve
It is connected；
The second pilot valve trepanning being connected with air and third pilot valve trepanning are additionally provided on the side wall of the pilot valve body.
The adjusting bolt is fixed on by locking nut on pilot valve body.
The center of the pilot valve spool is machined with centre bore, the centre bore and first in pilot valve spool outer wall
The annular gap that sealing ring and the second sealing ring are constituted is connected, and the pilot valve spool is also equipped with third sealing ring, described
Gap between second sealing ring and third sealing ring is not in communication with the outside.
The main valve includes valve body of main valve, and main valve end cap, the valve body of main valve and master are equipped at the top of valve body of main valve
Main valve chamber is formed between valve end cap, and valve disc, the valve disc and the step inside valve body of main valve are installed in main valve chamber interior
Face matches, and can block the liquid flowed through from main valve.
It is bolted at the top of the main valve end cap and cylinder body is installed, the cylinder interior is slidably installed and has work
The lower face of plug, the piston is installed with lower valve rod, and the lower valve rod passes through main valve end cap, another end solid with valve disc
It is fixed to be connected, upper valve rod is installed at the top of the piston, the upper valve rod passes through the through-hole at the top of cylinder body.
The outside of the upper valve rod is simultaneously set with resetting spring positioned at one end of cylinder interior, and the resetting spring passes through cylinder
Body and the position restraining portions part on upper valve rod apply main valve moving component downward elastic force.
The resetting spring is mounted on outside cylinder body applies elastic force to main valve moving component.
Indicator scale is installed, the indicator scale and the pointer being fixed on upper valve rod match at the top of the cylinder body
It closes, and indicates the aperture of main valve.
The utility model has the advantages that：
1, by using above-mentioned structure, it can ensure after booster occurs for pipeline, automatically be detected by pilot valve
It is leaked, and then quick detection and blocks fluid conveying；And electrical control is not needed by the booster shutoff valve that pilot valve controls,
And pilot valve is only relied on to the pressure of valve front and rear pipes as Rule of judgment, automatic realization valve is closed, and booster can be suitable for
Influence big, unattended, high degree of automation the occasion of needs.
2, it can adjust the pretightning force of pilot valve spring by rotating adjustment bolt.
3, it by the resetting spring, is mounted on upper valve rod axis, passes through cylinder body and the position on upper valve rod
Limiting component applies main valve moving component downward elastic force.
4, when the pressure suffered by the pilot valve spool is more than the pretightning force of pilot valve spring, pilot valve spool is in top dead centre, and first
The pressure of pilot valve trepanning is equal with cylinder body cavity of resorption chamber pressure, the cylinder body cavity of resorption chamber pressure of main valve, and pilot valve is in stable state, simultaneously
The piston of main valve pushes main valve upper valve rod, lower valve rod, valve disc to form under the action of the cylinder body lower chambers fluid pressure of main valve
Moving component moves downward, and overcomes the pretightning force of resetting spring, to keep main valve to be in open state.
5, when the pressure suffered by the pilot valve spool is less than the pretightning force of pilot valve spring, pilot valve spool downlink simultaneously contacts pilot valve end
Lid is in lower dead center, and the gap of the annular between the first sealing ring and the second sealing ring is connected to the second pilot valve trepanning, and then will
Cylinder body lower chambers and atmosphere, piston push main valve upper valve rod, lower valve rod, valve disc group under the preload force effect of resetting spring
At moving component move downward, to close main valve.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the utility model first embodiment structural schematic diagram.
Fig. 2 is the utility model second embodiment structural schematic diagram.
Fig. 3 is the utility model 3rd embodiment structural schematic diagram.
In figure：Valve body of main valve 11, main valve end cap 12, cylinder body 13, indicator scale 14, upper valve rod 15, resetting spring 16, piston
17, lower valve rod 18, valve disc 19；
Pilot valve body 21, pilot valve end cap 22, adjusting bolt 23, locking nut 24, pilot valve spring 25, pilot valve spool 26, first
Sealing ring 27, the second sealing ring 28, third sealing ring 29；
First pilot valve trepanning 31, pilot valve bottom opening 32, the second pilot valve trepanning 33, third pilot valve trepanning 34, main valve trepanning
35。
Specific implementation mode
The embodiment of the utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1：
As shown in Figure 1, pilot-operated type booster shutoff valve, it includes main valve, and the main valve is connected by connecting line with pilot valve；
The pilot valve includes pilot valve body 21, and the bottom of the pilot valve body 21 is equipped with pilot valve end cap 22, the pilot valve body 21 and pilot valve end
Lid 22 constitutes closed chamber, and the closed chamber internal-internal is equipped with pilot valve spring 25 and pilot valve spool 26, in pilot valve body 21
Top adjusting bolt 23 is installed, the bottom end face of the adjusting bolt 23 is in contact cooperation with the top of pilot valve spring 25；
The pretightning force of pilot valve spring 25 can be adjusted by adjusting bolt 23.
Further, the bottom sides of the pilot valve body 21 are machined with the first pilot valve trepanning 31, the first pilot valve trepanning
31 are connected with the water outlet side opening 37 of main valve；The center of the pilot valve end cap 22 is machined with pilot valve bottom opening 32, leads
Valve bottom opening 32 is connected with the main valve trepanning 35 of main valve；Valve body of main valve is enabled to by the first pilot valve trepanning 31
The pressure of 11 outlet pressure, 21 base pressure of pilot valve body and cylinder body 13 is equal.
Further, the second pilot valve trepanning 33 being connected with air and are additionally provided on the side wall of the pilot valve body 21
Three pilot valve trepannings 34.Can be ensured after booster occurs by the second pilot valve trepanning 33, by the pressure of cylinder body 13 and
Air is connected.
Further, the adjusting bolt 23 is fixed on by locking nut 24 on pilot valve body 21.
Further, the center of the pilot valve spool 26 is machined with centre bore, the centre bore be mounted on pilot valve spool
The first sealing ring 27 on 26 outer walls is connected with the annular gap that the second sealing ring 28 is constituted, and the pilot valve spool 26 is also pacified
Equipped with third sealing ring 29, the gap between second sealing ring 28 and third sealing ring 29 is not in communication with the outside.
Further, the main valve includes valve body of main valve 11, and main valve end cap 12, institute are equipped at the top of valve body of main valve 11
Formation main valve chamber between valve body of main valve 11 and main valve end cap 12 is stated, valve disc 19, the valve disc are installed in main valve chamber interior
19 match with the step surface inside valve body of main valve 11, and can block the liquid flowed through from main valve.
Further, the top of the main valve end cap 12, which is bolted, is equipped with cylinder body 13, inside the cylinder body 13
Being slidably installed has piston 17, and the lower face of the piston 17 is installed with lower valve rod 18, and the lower valve rod 18 passes through master
Valve end cap 12, another end are fixedly linked with valve disc 19, and the top of the piston 17 is installed with upper valve rod 15, it is described on
Valve rod 15 passes through the through-hole at the top of cylinder body 13.
Further, the outside of the upper valve rod 15 and one end inside the cylinder body 13 is set with resetting spring 16, institute
Resetting spring 16 is stated to apply downwards main valve moving component by cylinder body 13 and the position restraining portions part on upper valve rod 15
Elastic force.
Further, the top of the cylinder body 13 is equipped with indicator scale 14, the indicator scale 14 and is fixed on upper valve
Pointer on bar 15 matches, and indicates the aperture of main valve.
Embodiment 2：
Such as Fig. 2, in the present embodiment, the structure of the main valve and identical, the pilot valve in the present embodiment in implementing 1
Different in center hole structure and embodiment 1, in the present embodiment, centre bore is located at the center of pilot valve spool 26, and
The centre bore is by being attached thereto the logical annular for extending transversely through hole and being constituted with the first sealing ring 27 and the second sealing ring 28
Gap is connected.
Embodiment 3：
Such as Fig. 3, in the present embodiment, the structure of the main valve is identical in implementation 1, in the present embodiment the reset bullet
Spring 16 is mounted on outside cylinder body 13, and then applies elastic force to main valve moving component.
Embodiment 4：
The control method of pilot-operated type booster shutoff valve described in any one, by the control cavity pressure of pilot valve control bound,
Realize being turned on and off for main valve；
To realize the above-mentioned course of work, relationship is between each parameter：
When normal operation：P1 × A1=K1+f1, P1 × A2 > K2+f2；
When emergency cut-off：P2 × A1=K1-f1, K2 > f2；
Wherein：P1 is the minimum water outlet side pressure for keeping main valve to open, and P2 is maximum water outlet side pressure when main valve is closed,
A1 be pilot valve spool effective cross section product, K1 be pilot valve initial tension of spring, frictional force of the f1 between pilot valve spool and pilot valve body,
A2 accumulates for piston effective cross section, and K2 is resetting spring pretightning force, and f2 is between main valve moving component and cylinder body, main valve end cap
Frictional force；
Water outlet side pressure section is when main valve is kept it turning on（P2, ∞）, water outlet side pressure section when main valve is closed is（0,
P1）, i.e., main valve is opened when pressure is more than P2, and main valve is closed when being less than P1.
When main valve normal water supply or other liquid, water outlet side pressure is located at section（0, P1）When, suffered by pilot valve spool 26
Pressure be more than the pretightning force of pilot valve spring 25, pilot valve spool 26 is in top dead centre, the pressure and cylinder body of the first pilot valve trepanning 31
21 cavity of resorption chamber pressures, 13 cavity of resorption chamber pressure of cylinder body are equal, and pilot valve is in stable state, while piston 17 is in 13 lower chambers liquid of cylinder body
Under the action of body pressure, pushes the moving component that the upper valve rod 15, lower valve rod 18, valve disc 19 of main valve form to move downward, overcome
The pretightning force of resetting spring 16, to keep main valve to be in open state；
After booster occurs, water outlet side drop of pressure to section（0, P2）When, the pressure suffered by pilot valve spool 26, which is less than, to be led
When the pretightning force of valve spring 25,26 downlink of pilot valve spool simultaneously contacts pilot valve end cap 22, is in lower dead center, the first sealing ring 27 and the
Annular gap between two sealing rings 28 is connected to the second pilot valve trepanning 33, and then by 13 lower chambers of cylinder body and atmosphere, is lived
Plug 17 pushes the moving component that main valve upper valve rod 15, lower valve rod 18, valve disc 19 form under the preload force effect of resetting spring 16
It moves downward, to close main valve.
The course of work and operation principle of the utility model be：
Further, 25 pretightning force of pilot valve spring can be adjusted by rotating adjusting bolt 23, thus it is possible to vary main valve is opened
Minimum water outlet side pressure P1 and main valve close when maximum water outlet side pressure P2；
Further, the range that can not be adjusted of valve closing pressure settings is located at section（P1-P2）, difference P2-
P1 is only dependent upon the frictional force f1 between pilot valve spool and pilot valve body, reduces this frictional force and valve closing pressure set may be implemented
Value is located in the range of bigger.
Further, to realize above-mentioned principle, it need to only ensure that the pretightning force of main valve resetting spring 16 is more than main valve movement portion
Part frictional force f2, and realizing this purpose only needs to expand 19 effective cross section of piston product A2.
Above-described embodiment is used for illustrating the utility model, rather than limits the utility model, in this practicality
In novel spirit and scope of the claims, to any modifications and changes that the utility model is made, this reality is both fallen within
With novel protection domain.
Claims (8)
1. pilot-operated type booster shutoff valve, it includes main valve, it is characterised in that：The main valve is connected by connecting line with pilot valve；
The pilot valve includes pilot valve body（21）, the pilot valve body（21）Bottom pilot valve end cap is installed（22）, the pilot valve body
（21）With pilot valve end cap（22）Closed chamber is constituted, the closed chamber internal-internal is equipped with pilot valve spring（25）With pilot valve valve
Core（26）, in pilot valve body（21）Top adjusting bolt is installed（23）, the adjusting bolt（23）Bottom end face and pilot valve
Spring（25）Top be in contact cooperation；
The pilot valve body（21）Bottom sides be machined with the first pilot valve trepanning（31）, the first pilot valve trepanning（31）With main valve
Water outlet side opening（37）It is connected；
The pilot valve end cap（22）Center be machined with pilot valve bottom opening（32）, pilot valve bottom opening（32）With main valve
Main valve trepanning（35）It is connected；
The pilot valve body（21）Side wall on be additionally provided with the second pilot valve trepanning being connected with air（33）It is opened with third pilot valve
Hole（34）.
2. pilot-operated type booster shutoff valve according to claim 1, it is characterised in that：The adjusting bolt（23）Pass through locking
Nut（24）It is fixed on pilot valve body（21）On.
3. pilot-operated type booster shutoff valve according to claim 1, it is characterised in that：The pilot valve spool（26）Center add
Work has a centre bore, the centre bore be mounted on pilot valve spool（26）The first sealing ring on outer wall（27）With the second sealing ring
（28）The annular gap constituted is connected, the pilot valve spool（26）It is also equipped with third sealing ring（29）, described second is close
Seal（28）With third sealing ring（29）Between gap be not in communication with the outside.
4. pilot-operated type booster shutoff valve according to claim 1, it is characterised in that：The main valve includes valve body of main valve
（11）, in valve body of main valve（11）Top main valve end cap is installed（12）, the valve body of main valve（11）With main valve end cap（12）It
Between formed main valve chamber, valve disc is installed in main valve chamber interior（19）, the valve disc（19）With valve body of main valve（11）Internal
Step surface matches, and can block the liquid flowed through from main valve.
5. pilot-operated type booster shutoff valve according to claim 4, it is characterised in that：The main valve end cap（12）Top it is logical
It crosses bolt and is installed with cylinder body（13）, the cylinder body（13）Sliding fit inside is equipped with piston（17）, the piston（17）
Lower face be installed with lower valve rod（18）, the lower valve rod（18）Across main valve end cap（12）, another end and valve disc
（19）It is fixedly linked, the piston（17）Top be installed with upper valve rod（15）, the upper valve rod（15）Across cylinder body
（13）Top through-hole.
6. pilot-operated type booster shutoff valve according to claim 5, it is characterised in that：The upper valve rod（15）Outside and position
In cylinder body（13）Internal one end is set with resetting spring（16）, the resetting spring（16）Pass through cylinder body（13）With positioned at upper valve
Bar（15）On position restraining portions part apply downward elastic force to main valve moving component.
7. pilot-operated type booster shutoff valve according to claim 6, it is characterised in that：The resetting spring（16）Mounted on cylinder
Body（13）Outside applies elastic force to main valve moving component.
8. pilot-operated type booster shutoff valve according to claim 5, it is characterised in that：The cylinder body（13）Top be equipped with
Indicator scale（14）, the indicator scale（14）Be fixed on upper valve rod（15）On pointer match, and indicate opening for main valve
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111632.9U CN208041249U (en) | 2018-01-23 | 2018-01-23 | Pilot-operated type booster shutoff valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111632.9U CN208041249U (en) | 2018-01-23 | 2018-01-23 | Pilot-operated type booster shutoff valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208041249U true CN208041249U (en) | 2018-11-02 |
Family
ID=63954098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820111632.9U Active CN208041249U (en) | 2018-01-23 | 2018-01-23 | Pilot-operated type booster shutoff valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208041249U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331948A (en) * | 2018-01-23 | 2018-07-27 | 中国长江电力股份有限公司 | Pilot-operated type booster shutoff valve and control method |
-
2018
- 2018-01-23 CN CN201820111632.9U patent/CN208041249U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331948A (en) * | 2018-01-23 | 2018-07-27 | 中国长江电力股份有限公司 | Pilot-operated type booster shutoff valve and control method |
| CN108331948B (en) * | 2018-01-23 | 2023-05-16 | 中国长江电力股份有限公司 | Pilot-operated type pipe explosion shutoff valve and control method |
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