CN202946734U - Nitrogen-sealed valve - Google Patents
Nitrogen-sealed valve Download PDFInfo
- Publication number
- CN202946734U CN202946734U CN 201220620399 CN201220620399U CN202946734U CN 202946734 U CN202946734 U CN 202946734U CN 201220620399 CN201220620399 CN 201220620399 CN 201220620399 U CN201220620399 U CN 201220620399U CN 202946734 U CN202946734 U CN 202946734U
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- valve
- nitrogen
- pressure
- main valve
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Abstract
The utility model relates to a nitrogen-sealed valve. The number of components of the existing nitrogen-sealed valve is large, and assembly difficulty is large. When pressure compensates, the influence of pressure fluctuation on accuracy of set points cannot be completely eliminated, adjusting stability is poorer. The nitrogen-sealed valve comprises a main valve, a main valve executing mechanism and a detecting executor. The nitrogen-sealed valve is characterized in that a director is arranged on the upper portion of the main valve executing mechanism, an inlet end of the main valve is connected with a left end mouth of the director through a pressure-guiding pipe in front of the valve, the outlet end of the main valve is communicated with the lower end mouth of the main valve executing mechanism through a pressure-guiding pipe behind the valve, a right end mouth of the director is connected with a throttle valve through a pressure-guiding pipe, and the throttle valve is connected with the main valve executing mechanism. The nitrogen-sealed valve achieves automatic adjustment by using pressure change of adjusted media without additional energy and enables the pressure behind the valve to be constant. The nitrogen-sealed valve has the advantages that the whole machine has sensitive actions, control pressure fluctuation is small, and energy is saved.
Description
Technical field
The utility model relates to a kind of valve, especially a kind of self-contained pressure regulator with pilot valve.
Background technique
For making the storage tank gas sealing system pressure stabilitys such as petroleum product, chemical product in setting range, normally realize to the tank inner pressure control that automatically adjusts, with the protective system safe operation by installing self-contained pressure regulator additional.Existing nitrogen envelope valve arrangement is complicated, and amount of parts is many, and assembling difficulty is large.Can not eliminate pressure surge fully to the impact of set point precision when pressure compensation, modification stability is relatively poor.
The model utility content
The utility model provides a kind of nitrogen envelope valve for above-mentioned defective, and effectively the pressure precision at control point, debug simply, and the pilot pressure fluctuation is little, energy saving.
For this reason, the utility model is taked following technological scheme, a kind of nitrogen envelope valve, comprise main valve, main valve actuator and detect final controlling element, the top that it is characterized in that described main valve actuator arranges pilot valve, and the entrance point of described main valve is connected with the left port of pilot valve by PRESSURE PIPE before valve, the outlet end of main valve by valve after PRESSURE PIPE communicate with the lower end mouth of main valve actuator, the right output port of pilot valve is connected with a throttle valve by PRESSURE PIPE, and described throttle valve is connected with main valve actuator.
Also be provided with filtering pressure reducer on PRESSURE PIPE before described valve.Filtering pressure reducer both can play to filter and enter commander's gaseous impurity, played again the effect of voltage stabilizing and demonstration upstream pressure.
Be provided with spool and valve rod in described main valve, valve rod arranges bellows outward.The inside and outside pressure of the bellows balance regulating valve that arranges outside valve rod is cancelled out each other the various unbalanced forces in valve, guarantees that spool remains transient equiliblium in the course of the work, realizes the pressure auto-compensation.
The utility model need not external energy, utilizes and to be transferred the pressure of medium own to change and to realize automatically regulating, and makes downstream pressure constant, and complete machine has and is active in one's movements, and the pilot pressure fluctuation is little, the advantage of energy saving.The utility model adopts the method for power source and signaling point separate detection, adds the capable of regulating flow quantity device, and the degree of regulation of whole deck valve door is improved greatly, and the Pressure reducing ratio maximum can reach 2000:1.The automatic control occasion that can be widely used in various gas pressure-reduced and-regulateds, be particularly suitable as nitrogen envelope for the nitrogen valve, have that the pressure surge of lasting confession nitrogen is little, sensitive characteristics.
Description of drawings
Fig. 1 is the structural representation of model utility.
Fig. 2 is the structural representation of nitrogen seal device.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.
A kind of nitrogen envelope valve as shown in Figure 1 comprises main valve 5, main valve actuator 14 and detects final controlling element 2, is provided with spool 6 and valve rod 7 in main valve 5, main valve actuator 14 interior inserted link 8 and the springs 9 of arranging, the outer bellows that arranges of valve rod 7.The top of main valve actuator 14 arranges pilot valve 1, main valve 5 entrance points are connected with the left port of pilot valve 1 by PRESSURE PIPE 3 before valve, the outlet end of main valve 5 by valve after PRESSURE PIPE 13 communicate with the lower end mouth of main valve actuator 14, the right output port of pilot valve 1 arranges pilot valve spool 11 and is connected with a throttle valve 10 by PRESSURE PIPE 12, and throttle valve 10 is connected with main valve actuator 14.Also be provided with filtering pressure reducer 4 on PRESSURE PIPE 3 before valve.
Nitrogen seal device as shown in Figure 2 comprises nitrogen tank 18, arranges on nitrogen tank 18 to let out nitrogen valve 17, inhalation valve 16, nitrogen envelope valve 15, pressure gauge 21, feeding valve 20 and discharge valve 19, and nitrogen envelope valve 15 is preferred with the envelope of the nitrogen shown in Fig. 1 valve.
Envelope nitrogen device working procedure is as follows: after nitrogen tank discharge valve is opened, during user's blowing, liquid level descends, the gas phase partial volume increases, and in tank, nitrogen pressure reduces, and nitrogen envelope valve is opened, nitrogen injection in the nitrogen tank, in tank, nitrogen pressure rises, when the tank internal pressure rises to nitrogen envelope valve pressure set points, and nitrogen envelope valve autoshutdown.
After nitrogen tank feeding valve is opened, add materials in tank, the gas phase partial volume reduces, and pressure raises, when when letting out nitrogen valve pressure set points, let out the nitrogen valve and open, to extraneous liberating nitrogen gas, in tank, nitrogen pressure descends, and is down to when letting out nitrogen valve pressure set points, lets out nitrogen valve autoshutdown.
Should be understood that these embodiments only to be used for explanation the utility model and be not used in restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (3)
1. a nitrogen seals valve, comprise main valve, main valve actuator and detect final controlling element, the top that it is characterized in that described main valve actuator arranges pilot valve, the entrance point of described main valve is connected with the left port of pilot valve by PRESSURE PIPE before valve, the outlet end of main valve by valve after PRESSURE PIPE communicate with the lower end mouth of main valve actuator, the right output port of pilot valve is connected with a throttle valve by PRESSURE PIPE, and described throttle valve is connected with main valve actuator.
2. nitrogen seals valve according to claim 1, it is characterized in that also being provided with filtering pressure reducer on the front PRESSURE PIPE of described valve.
3. described nitrogen seals valve according to claim 1 and 2, it is characterized in that being provided with spool and valve rod in described main valve, and valve rod arranges bellows outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220620399 CN202946734U (en) | 2012-11-20 | 2012-11-20 | Nitrogen-sealed valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220620399 CN202946734U (en) | 2012-11-20 | 2012-11-20 | Nitrogen-sealed valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946734U true CN202946734U (en) | 2013-05-22 |
Family
ID=48422436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220620399 Expired - Fee Related CN202946734U (en) | 2012-11-20 | 2012-11-20 | Nitrogen-sealed valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946734U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439492A (en) * | 2015-08-10 | 2017-02-22 | 北京航天石化技术装备工程有限公司 | Nitrogen type water-attack pressure release valve system |
| CN107816633A (en) * | 2017-11-02 | 2018-03-20 | 钟晓山 | A kind of storage tank nitrogen seals integral type integrated interface |
| CN108005993A (en) * | 2017-11-22 | 2018-05-08 | 北京航天石化技术装备工程有限公司 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
-
2012
- 2012-11-20 CN CN 201220620399 patent/CN202946734U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439492A (en) * | 2015-08-10 | 2017-02-22 | 北京航天石化技术装备工程有限公司 | Nitrogen type water-attack pressure release valve system |
| CN107816633A (en) * | 2017-11-02 | 2018-03-20 | 钟晓山 | A kind of storage tank nitrogen seals integral type integrated interface |
| CN107816633B (en) * | 2017-11-02 | 2020-06-30 | 钟晓山 | Storage tank nitrogen seals integrated interface of style |
| CN108005993A (en) * | 2017-11-22 | 2018-05-08 | 北京航天石化技术装备工程有限公司 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
| CN108005993B (en) * | 2017-11-22 | 2023-12-15 | 北京航天石化技术装备工程有限公司 | Electrohydraulic actuator for gas flow regulating system of reciprocating compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20161120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |