CN201212574Y - Combination current limiting valve - Google Patents
Combination current limiting valve Download PDFInfo
- Publication number
- CN201212574Y CN201212574Y CNU2008200384603U CN200820038460U CN201212574Y CN 201212574 Y CN201212574 Y CN 201212574Y CN U2008200384603 U CNU2008200384603 U CN U2008200384603U CN 200820038460 U CN200820038460 U CN 200820038460U CN 201212574 Y CN201212574 Y CN 201212574Y
- Authority
- CN
- China
- Prior art keywords
- valve
- flow
- main valve
- limiting
- main
- 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 - Fee Related
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a combined flow-limiting valve, which belongs to the technical field of the fluid valve. The utility model aims to provide a flow-limiting valve with the excessive flow protection function, the forced sealing function and the manual unloading automatic opening function. The utility model is technically characterized in that the flow-limiting valve is composed of a valve body, a main valve core, an auxiliary valve core and a valve rod, wherein a balancing hole (14) is arranged on the main valve core (2), the valve rod (11) is matched with a threaded hole in the center of a valve cover (7), the upper end of the valve rod is connected with a handle (10), the lower end of the valve rod is connected with the auxiliary valve core (13), and the auxiliary valve core is opposite to the balancing hole in the center at the cylindrical top end of the main valve core. When the flow quantity of the fluid medium exceeds the set valve, the valve core is moved rapidly to cause the flow-limiting valve to be closed, the handle is rotated, and forced closing force is applied to the main valve core, so that the medium cannot leak; after the failure is eliminated, the handle is rotated, the auxiliary valve core is opened, the medium flows out of the flow-limiting valve through the balancing hole, and the flow-limiting valve is restored to the secure protective state.
Description
Technical field
The utility model relates to a kind of flow-limiting valve, particularly a kind of combined type current limiting valve.
Background technique
Flow-limiting valve is the important accessory that guarantees the pressure vessel safety operation, break at the flowing medium conveyance conduit, or the device fails that is installed on control hydrodynamic pressure on the pipeline or flow can quick closedown when causing flowing medium to leak in a large number, with the pressure vessel outlet pipe sealing, avoid the medium in the pressurized container to leak in a large number.
In the tradition flow-limiting valve, playing the internals of metering function is made up of spool, operating spring and spring-adjusting nut etc., its working principle is: come the compressed action spring by the position of adjusting spring-adjusting nut, make spool be in fully open position, after the rate-of flow by spool surpasses certain value, suffered fluid medium pressure difference will be above the supporting force of spring to spool before and after the spool, the spool quick closedown, prevent that the medium in the pressurized container from leaking in a large number, at this moment, the sealing force between spool and the valve seat is produced by pressure medium fully.Because the pressure between spool and the valve seat is produced by pressure medium fully,, after the flow-limiting valve action is closed, the sealing face leakage of a certain amount of medium by flow-limiting valve will be arranged for the flow-limiting valve that works in low-pressure system.In addition; because the pressure medium in the pressurized container is pressed on the valve seat flow-limiting valve spool; after the pressure vessel outlet fault is got rid of, must discharge the medium in the pressurized container by alternate manner and make the pressure medium reduction, flow-limiting valve just can be returned to the safety protection state.In order to make flow-limiting valve can be returned to the safety protection state; flowing medium normally passes through flow-limiting valve; Chinese patent ZL00263295.0 has introduced a kind of valve body flow-limiting valve of bypass tube pressure release in addition; its structure is for driving mouth and outlet on flow-limiting valve housing outer wall; one of external bypass tube terminates at inlet; the other end is contained in the outlet port, mounted valve on the bypass tube.But, the flow-limiting valve complex structure of this band bypass tube, volume is big.
Summary of the invention
The purpose of this utility model is to provide a kind of flow-limiting valve that has super traffic protection function and forced seal function and manually unload automatic open function.
Its technological scheme is: a kind of flow-limiting valve, comprise that screw thread is installed in valve body inner fluid entry end upside, main valve plug spring-leaf retainer with pod apertures, cylinder on the main valve plug that connects and composes by disk and cylinder, pass the center mounting hole on the main valve plug spring-leaf retainer, the disk that its lower end connects is relative with valve seat, its upper end is threaded with the main valve plug spring-adjusting nut, the main valve plug spring places on the cylinder of the main valve plug between main valve plug spring-adjusting nut and the main valve plug spring-leaf retainer, it is characterized in that: the center of main valve plug from the disk end to the cylinder top has equalizing orifice, the valve gap center that is threaded with valve body has tapped hole, valve rod cooperates with the tapped hole of valve gap center, its upper end is connected with handle, the lower end is connected with auxiliary valve core, and auxiliary valve core is relative with the equalizing orifice at center, main valve plug cylinder top.
Its technique effect is: owing to adopt main valve plug and valve seat to constitute the primary seal pair, so when the flow of flowing medium surpasses setting value, the pressure reduction that flowing medium produces on main valve plug will be above the supporting force of main valve plug spring to main valve plug, the main valve plug quick acting is closed flow-limiting valve, the closing valve passage; Simultaneously owing to adopt the equalizing orifice at auxiliary valve core and center, main valve plug cylinder top to constitute secondary sealing pair, therefore, as long as handle with sleeve, auxiliary valve core is moved downward, can close the equalizing orifice on the main valve plug, and apply the compulsory power of closing to main valve plug, make the medium can not be by the sealing surface of flow-limiting valve, thus can not cause medium leakage; After the pressure vessel outlet fault was got rid of, handle with sleeve was opened auxiliary valve core; medium then flows out this flow-limiting valve by equalizing orifice; after treating the pressure medium balance of spool front and back, main valve plug is opened under the effect of main valve plug spring automatically, makes flow-limiting valve be returned to the safety protection state.And it is simple in structure, and volume is little.
Figure of description
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model closed condition schematic representation.
Embodiment
As shown in Figure 1, this flow-limiting valve comprises that screw thread is installed in valve body 1 inner fluid entry end main valve plug spring-leaf retainer 3 upside, that have pod apertures, cylinder on the main valve plug 2 that connects and composes by disk and cylinder, pass the center mounting hole on the main valve plug spring-leaf retainer, the disk that its lower end connects is relative with valve seat 15, its upper end is threaded with main valve plug spring-adjusting nut 6, and main valve plug spring 5 places on the cylinder of the main valve plug between main valve plug spring-adjusting nut and the main valve plug spring-leaf retainer.By adjusting spring-adjusting nut, can regulate the support force of main valve plug spring to main valve plug.The center of main valve plug from the disk end to the cylinder top has equalizing orifice 14, valve gap 7 centers that are threaded with valve body have tapped hole, valve rod 11 cooperates with the tapped hole of valve gap center, its upper end is connected with handle 10, the lower end is connected with auxiliary valve core 13, and auxiliary valve core is relative with the equalizing orifice at center, main valve plug cylinder top.Valve rod 11 is structure as a whole with auxiliary valve core 13.
Joint between valve gap 7 and the valve body is provided with seal ring 4.Be provided with the seal arrangement that constitutes by filler 8, pressure ring 9 and pressure cap 12 between valve gap 7 and the valve rod 11.
Its working procedure is: when the flow of flowing medium was lower than setting value, flowing medium can normally pass through the passage of this flow-limiting valve by the illustrated flow direction of Fig. 1.If when the flow of flowing medium surpassed setting value, the pressure reduction that flowing medium produces on main valve plug will be above the supporting force of main valve plug spring to main valve plug, the main valve plug quick acting is closed flow-limiting valve.At this moment, handle with sleeve moves downward auxiliary valve core, closes on the one hand the equalizing orifice on the main valve plug, applies the compulsory power of closing to main valve plug on the other hand, makes the medium can not be by the sealing surface of flow-limiting valve, thus can not cause medium the leakage (see figure 2).
After the pressure vessel outlet fault was got rid of, handle with sleeve was opened auxiliary valve core, and medium then flows out this flow-limiting valve by equalizing orifice.After treating pressure medium balance after and before the valve, main valve plug is opened under the effect of main valve plug spring automatically, makes flow-limiting valve be returned to the safety protection state.
Claims (4)
1, a kind of flow-limiting valve, comprise that screw thread is installed in valve body (1) inner fluid entry end upside, main valve plug spring-leaf retainer (3) with pod apertures, cylinder on the main valve plug (2) that connects and composes by disk and cylinder, pass the center mounting hole on the main valve plug spring-leaf retainer, the disk that its lower end connects is relative with valve seat (15), its upper end is threaded with main valve plug spring-adjusting nut (6), main valve plug spring (5) places on the cylinder of the main valve plug between main valve plug spring-adjusting nut and the main valve plug spring-leaf retainer, it is characterized in that: the center of main valve plug (2) from the disk end to the cylinder top has equalizing orifice (14), the valve gap that is threaded with valve body (7) center has tapped hole, valve rod (11) cooperates with the tapped hole of valve gap center, its upper end is connected with handle (10), the lower end is connected with auxiliary valve core (13), and auxiliary valve core is relative with the equalizing orifice at center, main valve plug cylinder top.
2, a kind of flow-limiting valve according to claim 1 is characterized in that: valve rod (11) is an overall structure with auxiliary valve core (13).
3, a kind of flow-limiting valve according to claim 1 is characterized in that: the joint between valve gap (7) and the valve body is provided with seal ring (4).
4, a kind of flow-limiting valve according to claim 1 is characterized in that: be provided with the seal arrangement that is made of filler (8), pressure ring (9) and pressure cap (12) between valve gap (7) and the valve rod 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200384603U CN201212574Y (en) | 2008-06-20 | 2008-06-20 | Combination current limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200384603U CN201212574Y (en) | 2008-06-20 | 2008-06-20 | Combination current limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201212574Y true CN201212574Y (en) | 2009-03-25 |
Family
ID=40496747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200384603U Expired - Fee Related CN201212574Y (en) | 2008-06-20 | 2008-06-20 | Combination current limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201212574Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793200A (en) * | 2010-03-10 | 2010-08-04 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN101985982A (en) * | 2010-07-02 | 2011-03-16 | 合肥通用机械研究院 | Heavy-caliber gate valve |
| CN102207200A (en) * | 2011-05-24 | 2011-10-05 | 苏州新锐工程工具有限公司 | High-pressure unloading manual stop valve |
| CN109058532A (en) * | 2018-10-29 | 2018-12-21 | 镇江市鑫浩塑胶有限公司 | A kind of check-valves with safety valve |
-
2008
- 2008-06-20 CN CNU2008200384603U patent/CN201212574Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793200A (en) * | 2010-03-10 | 2010-08-04 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN101793200B (en) * | 2010-03-10 | 2013-04-24 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN101985982A (en) * | 2010-07-02 | 2011-03-16 | 合肥通用机械研究院 | Heavy-caliber gate valve |
| CN102207200A (en) * | 2011-05-24 | 2011-10-05 | 苏州新锐工程工具有限公司 | High-pressure unloading manual stop valve |
| CN109058532A (en) * | 2018-10-29 | 2018-12-21 | 镇江市鑫浩塑胶有限公司 | A kind of check-valves with safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9328745B2 (en) | Pressure storage system and method to operate pressure storage system | |
| CA2617999C (en) | Tank manifold assembly | |
| CN203421240U (en) | Y type pilot-operated type water-attack pressure release valve system | |
| CN201212574Y (en) | Combination current limiting valve | |
| US20140124062A1 (en) | Valve assembly for pressure storage vessel | |
| CN108131473A (en) | The check valve of decompression function built in a kind of band | |
| WO2021121399A1 (en) | Hydrogen storage system of fuel cell vehicle and fuel cell vehicle | |
| JP5432584B2 (en) | Check valve with built-in liquid seal prevention mechanism | |
| CN208674271U (en) | One proton exchanging film fuel battery automobile hydrogen supply and hydrogen gas circulating system | |
| CN113374907B (en) | Adjustable pneumatic pressure relief device and water hammer inhibition method based on same | |
| CN208204110U (en) | The check valve of decompression function built in a kind of band | |
| CN202733017U (en) | Hand stop valve | |
| CN101328985B (en) | Combined type current limiting valve | |
| CN101985990B (en) | Metal bidirectional sealing valve cavity safety relief device | |
| CN206221729U (en) | Series redundancy formula pressure-regulating device | |
| CN201836479U (en) | Safety relief device of metal two-way sealing valve cavity | |
| JP5635813B2 (en) | Check valve with built-in liquid seal prevention mechanism | |
| CN213810022U (en) | Integrated cylinder valve | |
| CN201322016Y (en) | Oil pipe explosion-proof device | |
| CN103940124A (en) | Mechanical pilot-operated type internally piloted valve | |
| CN103511696B (en) | A kind of excess flow valve that can realize automatically reseting with zero leakage | |
| CN108613372B (en) | Pressure-bearing water storage water heater with pressure-bearing water tank protection device | |
| CN202228214U (en) | Pressure regulating and pressure reducing device used for gas vehicle electric control jetting system | |
| CN207609826U (en) | A kind of safety valve | |
| CN108895166B (en) | A kind of valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090325 Termination date: 20100620 |