CN201753791U - Heavy-caliber pilot operated safety valve - Google Patents
Heavy-caliber pilot operated safety valve Download PDFInfo
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- CN201753791U CN201753791U CN2010202761485U CN201020276148U CN201753791U CN 201753791 U CN201753791 U CN 201753791U CN 2010202761485 U CN2010202761485 U CN 2010202761485U CN 201020276148 U CN201020276148 U CN 201020276148U CN 201753791 U CN201753791 U CN 201753791U
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- valve
- pilot
- main valve
- main
- pilot valve
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- Lift Valve (AREA)
Abstract
The utility model discloses a heavy-caliber pilot operated safety valve, which comprises a main valve and a pilot valve. A main valve clack is pressed on a main valve seat to separate the inlet of the main valve from the outlet of the main valve. The inner cavity of the main valve body is provided with a main valve guide sleeve; the main valve clack can slide along the inner wall of the main valve guide sleeve up and down; a main valve pressure cavity is formed between the upper part of the main valve clack and a main valve cover; a pilot valve is arranged above the main valve cover; and a pilot valve spring compresses a pilot valve clack on a pilot valve seat to separate the inlet of the pilot valve from the outlet of the pilot valve. The center of the bottom of the main valve clack is provided with a main valve clack center pipe which is extended upwards, and the upper part of the main valve clack center pipe is connected with a guide pipe; the upper end of the guide pipe is inserted into the inlet of the pilot valve; the main valve cover is provided with a channel communicating the inlet of the pilot valve and the main valve pressure cavity; the outlet of the pilot valve is communicated with the outlet of the main valve through a pilot valve exhaust pipe; and the caliber of the pilot valve exhaust pipe is larger than that of the guide pipe. The pilot operated safety valve has simple structure and less leakage points; the sealing and opening power is strong for the main valve, and the opening and the closing are rapid and reliable.
Description
Technical field
The utility model relates to a kind of safety valve, particularly a kind of heavy caliber Pilot operated safety valve.
Background technique
Pilot operated safety valve is a kind of non-direct-operated relief valve, because the requirement of operating mode and the special circumstances such as permission of manufacturing, Pilot operated safety valve can not be replaced by other safety valve, is widely used on industry equipments such as oil, chemical industry.
On February 21st, 2007, notification number is the Chinese utility model patent of CN2872014Y, a kind of Pilot operated safety valve is disclosed, comprise main valve and pilot valve, main valve comprises valve body of main valve and main valve valve gap, valve body of main valve is provided with main valve import and main valve outlet, the valve body of main valve inner chamber is provided with main valve valve seat and main valve flap, the main valve flap is pressed on the main valve valve seat isolates main valve import and main valve outlet, the inner chamber of described valve body of main valve is provided with the main valve guide sleeve, the periphery of described main valve flap is provided with the flap seal ring and can slides up and down along the inwall of described main valve guide sleeve, constitutes the main valve pressure chamber between main valve flap top and the described main valve valve gap; Pilot valve is made up of drainage function structure, the functional structure of damming and a time seat regulatory function structure, and is relatively independent on pilot valve and the main valve structure, is connected main valve in aggregates with pilot valve by external inlet pressure pipe with the air chamber pressure pipe.The pilot valve complex structure of this safety valve, external inlet pressure pipe and air chamber pressure pipe leak easily, influence the keying reliability of safety valve.
The model utility content
The technical problems to be solved in the utility model is, a kind of heavy caliber Pilot operated safety valve is provided, and need not to be provided with outside valve body inlet pressure pipe or air chamber pressure pipe, and is simple in structure, reliable in action, and leakage point is few.
For solving above technical problem, a kind of heavy caliber Pilot operated safety valve provided by the utility model, comprise main valve and pilot valve, main valve comprises valve body of main valve and main valve valve gap, valve body of main valve is provided with main valve import and main valve outlet, be provided with main valve valve seat and main valve flap in the valve body of main valve, the main valve flap is pressed on the main valve valve seat isolates main valve import and main valve outlet, the inner chamber of described valve body of main valve is provided with the main valve guide sleeve, the periphery of described main valve flap is provided with the flap seal ring and can slides up and down along the inwall of described main valve guide sleeve, constitutes the main valve pressure chamber between main valve flap top and the described main valve valve gap; Described pilot valve is installed in the top of described main valve valve gap, comprise pilot valve valve body, pilot valve valve gap, pilot valve seat, pilot valve flap and pilot valve valve rod, the pilot valve valve gap is positioned at pilot valve valve body top, be provided with the pilot valve spring in the pilot valve valve gap, the pilot valve spring is supported on the top of pilot valve valve rod by the pilot valve spring seat, the pilot valve flap is connected the lower end of pilot valve valve rod, the pilot valve valve body is provided with pilot valve import and pilot valve outlet, and the pilot valve spring is pressed on the pilot valve flap on the pilot valve seat by the pilot valve valve rod isolates pilot valve import and pilot valve outlet; The bottom centre of described main valve flap is provided with upwardly extending main valve flap center tube, the top of described main valve flap center tube is connected with honeycomb duct, the lower end of described honeycomb duct is inserted in the described main valve flap center tube and is provided with the honeycomb duct seal ring between the two, into described pilot valve import is inserted in the upper end of described honeycomb duct, described main valve valve gap is provided with the passage that described pilot valve import and described main valve pressure chamber are connected, described pilot valve outlet is connected with described main valve outlet by the pilot valve outlet pipe, and the bore of described pilot valve outlet pipe is greater than the bore of described honeycomb duct.
With respect to prior art, the utility model has been obtained following beneficial effect: this heavy caliber Pilot operated safety valve is installed on certain container, main valve flap center tube and honeycomb duct are connected the main valve import with the pilot valve import, honeycomb duct is positioned at valve inner can reduce leakage point; Pressure in container is that the pressure of main valve inlet is when being lower than setting pressure, the pilot valve flap is in closed condition, gas in the container arrives the pilot valve import by main valve flap center tube and honeycomb duct, arrive the main valve pressure chamber by the passage on the main valve valve gap again, because the sealing area of main valve flap top is greater than the sealing area of its below, the main valve flap is pressed on the main valve valve seat, guarantees that sealing is reliable; When the pressure in the container reaches setting value, the pilot valve flap is opened, the gas of pilot valve inlet and main valve pressure chamber is discharged from the pilot valve outlet pipe rapidly, and the bore of pilot valve outlet pipe is greater than the bore of honeycomb duct, guarantees to discharge the pressure of main valve pressure chamber is reduced rapidly, main valve flap top loses sealing load, gas by the below backs down, and the gas in the container is able to rapid release, until dropping to Reseating pressure of a safety valve, pilot valve cuts out, and the sealing of main valve flap is recovered.This heavy caliber Pilot operated safety valve overall structure is simple, and the sealing of main valve and turn on the power by force opens and closes reliable rapidly.
As improvement of the present utility model, the excircle of described main valve flap center tube is set with the main spool spring seat, is provided with main spool spring between the lower end surface of described main spool spring seat and described main valve valve gap.Mounting spring can make flap more stable when switching motion on the main valve flap center tube, and minimizing is rocked.
As further improvement of the utility model, the base plate of described main valve flap is provided with escape orifice, in the described escape orifice plug screw of releasing is installed.After safety valve used a period of time, main valve flap top may more residual chips, turn on the plug screw of releasing and it can be released, and tighten sealing then again.
As another improvement of the present utility model, described pilot valve flap is arranged in the pilot valve bellows component, and the upper end of described pilot valve bellows component is connected with the lower end of described pilot valve valve rod.The pilot valve flap is connected with the pilot valve valve rod by the pilot valve bellows component, and pilot valve outlet back pressure opens and closes the influence that brings for the pilot valve flap in the time of can being buffered in the unlatching of pilot valve flap.
Description of drawings
The structural representation of Fig. 1 the utility model heavy caliber Pilot operated safety valve.
Fig. 2 is the enlarged view of A portion among Fig. 1.
Among the figure: 1 honeycomb duct, 2 main valve valve gaps, 3 honeycomb duct seal rings, 4 main spool springs, 5 main spool spring seats, 6 main valve guide sleeves, 7 flap seal rings, 8 main valve flaps, 8a main valve pressure chamber, 8b main valve flap center tube, 8c release plug screw, 9 valve body of main valve, 9a main valve valve seat, 10 pilot valve outlet pipes, 11 pilot valve flaps, 12 pilot valve bellows components, 13 pilot valve seat, 14 pilot valve valve bodies, 15 pilot valve valve rods, 16 pilot valve springs, 17 pilot valve spring seats, 18 pilot valve valve gaps, the outlet of 19 pilot valves.
Embodiment
As shown in Figures 1 and 2, heavy caliber Pilot operated safety valve of the present utility model comprises main valve and pilot valve, main valve comprises valve body of main valve 9 and main valve valve gap 2, valve body of main valve 9 is provided with main valve import and main valve outlet, valve body of main valve 9 inner chambers are provided with main valve valve seat 9a and main valve flap 8, main valve flap 8 is pressed in main valve valve seat 9a and goes up main valve import and main valve outlet isolation, the inner chamber of valve body of main valve 9 is provided with main valve guide sleeve 6, the periphery of main valve flap 8 is provided with flap seal ring 7 and can slides up and down along the inwall of main valve guide sleeve 6, constitutes main valve pressure chamber 8a between main valve flap 8 tops and the main valve valve gap 2.The base plate of main valve flap is provided with escape orifice, and the plug screw 8c that releases is installed in the escape orifice.
Pilot valve is installed in the top of main valve valve gap 2, comprise pilot valve valve body 14, pilot valve valve gap 18, pilot valve seat 13, pilot valve flap 11 and pilot valve valve rod 15, pilot valve valve gap 18 is positioned at pilot valve valve body 14 tops, be provided with pilot valve spring 16 in the pilot valve valve gap 18, pilot valve spring 16 is supported on the top of pilot valve valve rod 15 by pilot valve spring seat 17, pilot valve flap 11 is arranged in pilot valve bellows component 12, the upper end of pilot valve bellows component 12 is connected with the lower end of pilot valve valve rod 15, pilot valve valve body 14 is provided with pilot valve import and pilot valve outlet 19, and pilot valve spring 16 is pressed on pilot valve flap 11 on the pilot valve seat 13 by pilot valve valve rod 15 isolates pilot valve import and pilot valve outlet 19.
The bottom centre of main valve flap 8 is provided with upwardly extending main valve flap center tube 8b, and the excircle of main valve flap center tube 8b is set with main spool spring seat 5, is provided with main spool spring 4 between the lower end surface of main spool spring seat 5 and main valve valve gap 2.The top of main valve flap center tube 8b is connected with honeycomb duct 1, the lower end of honeycomb duct 1 is inserted among the main valve flap center tube 8b and is provided with honeycomb duct seal ring 3 between the two, into pilot valve import is inserted in the upper end of honeycomb duct 1, main valve valve gap 2 is provided with the passage that pilot valve import and main valve pressure chamber 8a are connected, the pilot valve outlet is connected with the main valve outlet by pilot valve outlet pipe 10, and the bore of pilot valve outlet pipe 10 is greater than the bore of honeycomb duct 1.
This heavy caliber Pilot operated safety valve is installed on the container, main valve flap center tube 8b and honeycomb duct 1 are connected the main valve import with the pilot valve import, when the pressure in the container is that the pressure of main valve inlet is when being lower than setting pressure, pilot valve is in closed condition, gas in the container arrives the pilot valve import by main valve flap center tube 8b and honeycomb duct 1, arrive main valve pressure chamber 8a by the passage on the main valve valve gap 2 again, because the sealing area of main valve flap 8 tops is greater than the sealing area of its below, main valve flap 8 is pressed on the main valve valve seat 9a, guarantees that sealing is reliable.
When the pressure in the container reaches setting value, pilot valve flap 11 is opened, the gas of pilot valve inlet and main valve pressure chamber 8a is discharged from pilot valve outlet pipe 10 rapidly, the pressure of main valve pressure chamber 8a descends rapidly, and main valve flap 8 tops lose sealing load, are backed down by the gas of below, gas in the container is able to rapid release, until dropping to Reseating pressure of a safety valve, pilot valve cuts out, and the sealing of main valve flap 8 is recovered.
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all fall into the protection domain of the utility model requirement.
Claims (4)
1. heavy caliber Pilot operated safety valve, comprise main valve and pilot valve, main valve comprises valve body of main valve and main valve valve gap, valve body of main valve is provided with main valve import and main valve outlet, be provided with main valve valve seat and main valve flap in the valve body of main valve, the main valve flap is pressed on the main valve valve seat isolates main valve import and main valve outlet, the inner chamber of described valve body of main valve is provided with the main valve guide sleeve, the periphery of described main valve flap is provided with the flap seal ring and can slides up and down along the inwall of described main valve guide sleeve, constitutes the main valve pressure chamber between main valve flap top and the described main valve valve gap; It is characterized in that, described pilot valve is installed in the top of described main valve valve gap, comprise pilot valve valve body, pilot valve valve gap, pilot valve seat, pilot valve flap and pilot valve valve rod, the pilot valve valve gap is positioned at pilot valve valve body top, be provided with the pilot valve spring in the pilot valve valve gap, the pilot valve spring is supported on the top of pilot valve valve rod by the pilot valve spring seat, the pilot valve flap is connected the lower end of pilot valve valve rod, the pilot valve valve body is provided with pilot valve import and pilot valve outlet, and the pilot valve spring is pressed on the pilot valve flap on the pilot valve seat by the pilot valve valve rod isolates pilot valve import and pilot valve outlet; The bottom centre of described main valve flap is provided with upwardly extending main valve flap center tube, the top of described main valve flap center tube is connected with honeycomb duct, the lower end of described honeycomb duct is inserted in the described main valve flap center tube and is provided with the honeycomb duct seal ring between the two, into described pilot valve import is inserted in the upper end of described honeycomb duct, described main valve valve gap is provided with the passage that described pilot valve import and described main valve pressure chamber are connected, described pilot valve outlet is connected with described main valve outlet by the pilot valve outlet pipe, and the bore of described pilot valve outlet pipe is greater than the bore of described honeycomb duct.
2. heavy caliber Pilot operated safety valve according to claim 1 is characterized in that, the excircle of described main valve flap center tube is set with the main spool spring seat, is provided with main spool spring between the lower end surface of described main spool spring seat and described main valve valve gap.
3. heavy caliber Pilot operated safety valve according to claim 1 and 2 is characterized in that the base plate of described main valve flap is provided with escape orifice, in the described escape orifice plug screw of releasing is installed.
4. heavy caliber Pilot operated safety valve according to claim 1 and 2 is characterized in that, described pilot valve flap is arranged in the pilot valve bellows component, and the upper end of described pilot valve bellows component is connected with the lower end of described pilot valve valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202761485U CN201753791U (en) | 2010-07-30 | 2010-07-30 | Heavy-caliber pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202761485U CN201753791U (en) | 2010-07-30 | 2010-07-30 | Heavy-caliber pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201753791U true CN201753791U (en) | 2011-03-02 |
Family
ID=43621523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202761485U Expired - Fee Related CN201753791U (en) | 2010-07-30 | 2010-07-30 | Heavy-caliber pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201753791U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065738A (en) * | 2015-07-17 | 2015-11-18 | 永一阀门集团有限公司 | Adjustable-flow pilot-operated type safety valve with induction tube |
| CN110030412A (en) * | 2019-03-08 | 2019-07-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of heavy caliber multistage pilot operated safety valve |
| CN113606369A (en) * | 2021-07-21 | 2021-11-05 | 哈电集团哈尔滨电站阀门有限公司 | Pilot-operated safety valve with novel structure and use method |
-
2010
- 2010-07-30 CN CN2010202761485U patent/CN201753791U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065738A (en) * | 2015-07-17 | 2015-11-18 | 永一阀门集团有限公司 | Adjustable-flow pilot-operated type safety valve with induction tube |
| CN110030412A (en) * | 2019-03-08 | 2019-07-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of heavy caliber multistage pilot operated safety valve |
| CN110030412B (en) * | 2019-03-08 | 2024-06-04 | 哈电集团哈尔滨电站阀门有限公司 | Large-caliber multi-stage pilot operated safety valve |
| CN113606369A (en) * | 2021-07-21 | 2021-11-05 | 哈电集团哈尔滨电站阀门有限公司 | Pilot-operated safety valve with novel structure and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANZHENG VALVE CO., LTD. Free format text: FORMER OWNER: XU WENXIAN Effective date: 20120426 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 225008 YANGZHOU, JIANGSU PROVINCE TO: 325105 WENZHOU, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120426 Address after: Fort Wenzhou Oubei town of Zhejiang province 325105 City Industrial Street No. 109 Patentee after: Tianzheng Valve Co., Ltd. Address before: 225008 Friendship Road 218, Weiyang District, Jiangsu, Yangzhou Patentee before: Xu Wenxian |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20190730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |