CN217765416U - Portable explosion-proof miniature gas cylinder driving pilot-operated safety valve online calibration device - Google Patents
Portable explosion-proof miniature gas cylinder driving pilot-operated safety valve online calibration device Download PDFInfo
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- CN217765416U CN217765416U CN202221440951.7U CN202221440951U CN217765416U CN 217765416 U CN217765416 U CN 217765416U CN 202221440951 U CN202221440951 U CN 202221440951U CN 217765416 U CN217765416 U CN 217765416U
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Abstract
The utility model discloses an online calibration equipment of light explosion-proof miniature gas cylinder drive pilot operated relief valve, including portable high-pressure gas cylinder, portable check-up switch board, first articulate high-pressure gas cylinder connecting pipe, the air supply manometer, the check-up valve, the relief valve, the high-pressure gas cylinder connecting pipe is connected with high-pressure gas cylinder, the second joint is still connected to the check-up valve, be equipped with manometer installation screens and check-up interface on the second joint, manometer installation screens is connected with the check-up manometer, check-up interface connection high-pressure hose for the check-up, high-pressure hose for the check-up and one of them interface connection of three-way valve, two other interfaces of three-way valve are connected with the pilot valve through first high-pressure hose respectively, second high-pressure hose is connected with the main valve. The utility model discloses need not dismantle the pilot operated relief valve, both can realize the pressure check-up of setting of pilot operated relief valve and main valve in the pilot operated relief valve, can also detect pilot operated valve and main valve leakproofness, very big intensity of labour when having alleviateed the check-up has subtracted the check-up time.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of natural gas engineering equipment detects, concretely relates to natural gas engineering equipment is using online calibration equipment of guide's formula relief valve.
[ background of the invention ]
The safety valve is used as an automatic control valve and is widely applied to pressure-bearing equipment of special equipment such as pressure vessels (tank cars), pressure pipelines, boilers and the like. When the pressure of the medium in the protected equipment exceeds a preset setting pressure value, the safety valve can be automatically opened to discharge a certain amount of medium, and when the pressure in the equipment is reduced to or slightly lower than the setting pressure value, the valve can be automatically closed, so that the safety valve plays a role of overpressure protection in the safe operation of the pressure-bearing equipment. The safety valve is generally checked at least once every year, and the normal operation of the function of the safety valve can be effectively ensured by regularly checking, debugging and maintaining the safety valve on time.
A pilot operated safety valve is a safety valve that is driven or controlled by the venting of a medium from a pilot valve, which itself is a direct load safety valve. The pilot operated safety valve is characterized in that a pilot mechanism is additionally arranged on a base body of a common spring type safety valve, so that the safety valve has double functions of the pilot operated safety valve and the common safety valve. It is characterized in that; accurate and reliable action, radically improved sealing performance, easily-met opening and closing pressure difference, sensitive action, large discharge and the like. In recent years, the pilot operated safety valve has been widely used in the fields of petroleum and natural gas, chemical industry and city gas due to its novel structure, excellent sealing and stable discharge performance.
According to the structural characteristics of the pilot operated safety valve, only the pilot valve can be actually adjusted and set during verification of the pilot operated safety valve, so that the adjustment and the calibration of the pressure value of the pilot valve are key technologies and difficulties for verifying the pilot operated safety valve. At present, the pilot operated safety valve is integrally disassembled to be conveyed to an offline checking table for offline checking, and due to the limitation of the installation and use conditions of the safety valve, the safety valve is difficult to disassemble, hoist and install, the workload is large, the checking cost is high, and the checking period is long.
[ Utility model ] content
Not enough to prior art, the utility model aims to solve the technical problem that an online calibration equipment of portable explosion-proof miniature gas cylinder drive guide's formula relief valve is provided, solves because relief valve installation and service condition's restriction, the comparatively difficult of dismantlement, hoist and mount and the installation of relief valve, causes that relief valve check-up work volume is big, and the check-up is with high costs, the problem of check-up cycle length.
In order to solve the technical problem, the utility model adopts the following technical scheme: a portable explosion-proof miniature gas cylinder driving pilot operated safety valve online calibration device comprises a portable high-pressure gas cylinder and a portable calibration control cabinet, wherein a first joint, a second joint, a gas source pressure gauge, a calibration valve, a pressure release valve, a calibration pressure gauge and a three-way valve are arranged in the portable calibration control cabinet; the high-pressure gas cylinder connecting pipe is connected with the high-pressure gas cylinder, the check valve is connected with the pressure release valve, the check valve is further connected with the second connector, a pressure gauge mounting clamp and a check interface are arranged on the second connector, the pressure gauge mounting clamp is connected with the check pressure gauge, the check interface is connected with a high-pressure hose for checking, the high-pressure hose for checking is connected with one interface of the three-way valve, the other two interfaces of the three-way valve are respectively connected with the pilot valve through the first high-pressure hose, and the second high-pressure hose is connected with the main valve.
Preferably, the portable checking control cabinet is further provided with a combustible gas alarm which sends out an alarm signal when detecting that the concentration of the combustible gas reaches the set explosion or poisoning alarm critical point.
Preferably, the first high-pressure hose has a pilot valve connection female connector at a distal end thereof for mating connection with the pilot valve pipe connection port, and the second high-pressure hose has a main valve connection female connector at a distal end thereof for mating connection with the main valve pipe connection port.
Compared with the prior art, the utility model has the advantages of: the utility model discloses need not dismantle pilot operated relief valve, only need through simple structure, both can realize the pressure check-up of adjusting of pilot valve and main valve among the pilot operated relief valve, can also detect pilot valve and main valve leakproofness. The labor intensity during the verification is greatly reduced, and the verification time is greatly shortened especially for the verification of the pilot operated safety valve with large caliber and high installation position of the natural gas engineering equipment. The whole device is convenient to carry, the calibration data is accurate and perfect, the field calibration problem of enterprises using the pilot operated safety valve of the natural gas engineering equipment is fully solved, and the production safety of each oil and gas enterprise can be powerfully guaranteed.
In addition, the device is provided with a combustible gas alarm instrument which can quickly detect the concentration of the combustible gas and send out an alarm signal when the concentration of the combustible gas reaches the set explosion or poisoning alarm critical point so as to remind the working personnel to take safety measures and prevent explosion, fire and poisoning accidents.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The utility model is further described with the following drawings:
fig. 1 is a schematic structural view of the portable explosion-proof miniature gas cylinder driving pilot operated safety valve on-line calibration device of the utility model;
reference numerals: the device comprises a portable high-pressure gas cylinder 1, a high-pressure gas cylinder connecting pipe 2, a gas source pressure gauge 3, a combustible gas alarm instrument 4, a check valve 5, a check pressure gauge I6, a check pressure gauge II 7, a high-pressure hose 8 for checking, a three-way valve 9, a first high-pressure hose 10, a pilot valve connecting female joint 11, a second high-pressure hose 12, a main valve connecting female joint 13, a pressure release valve 14 and a portable check control cabinet 15.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
The utility model discloses be applied to the online check-up of guide's formula relief valve on the compressed natural gas carries engineering equipment, because the relief valve has important superpressure guard action, relevant law, regulation have gone out the periodic check-up requirement to the relief valve, and the relief valve generally checks up once at least every year. The method is limited in that the compressed natural gas transmission engineering equipment cannot stop transmission after running for a year, and the pilot valve and the main valve are opened and closed by connecting the guide pipe of the pilot safety valve and pressurizing the guide pipe by combining the working principle of the pilot safety valve, so that the setting pressure of the pilot valve and the main valve of the pilot safety valve and the sealing performance of the pilot valve and the main valve are verified.
Referring to fig. 1, the portable explosion-proof micro gas cylinder driving pilot type safety valve online calibration device comprises a portable high-pressure gas cylinder 1 and a portable calibration control cabinet 15, wherein a first joint, a second joint, a gas source pressure gauge 3, a calibration valve 5, a pressure release valve 14, a calibration pressure gauge and a three-way valve 9 are arranged in the portable calibration control cabinet 15, the first joint is connected with a high-pressure gas cylinder connecting pipe 2, the gas source pressure gauge 3, the calibration valve 5 and the pressure release valve 14, the high-pressure gas cylinder connecting pipe 2 is connected with the high-pressure gas cylinder, the calibration valve is further connected with the second joint, a pressure gauge mounting clamp and a calibration interface are arranged on the second joint, the pressure gauge mounting clamp is connected with the calibration pressure gauge, the calibration interface is connected with a calibration high-pressure hose 8, the calibration high-pressure hose 8 is connected with one interface of the three-way valve 9, and the other two interfaces of the three-way valve are respectively connected with a pilot valve through a first high-pressure hose 10 and a second high-pressure hose 12 is connected with a main valve.
It can be understood that two check pressure gauges, namely a check pressure gauge I6 and a check pressure gauge II 7 are arranged, one check pressure gauge is selected during use, and the other check pressure gauge is standby. The high-pressure gas cylinder connecting pipe can be arranged to be long so as to facilitate connection, for example, 10 meters.
Further, the portable checking control cabinet 15 is also provided with a combustible gas alarm 4, and when the concentration of combustible gas (i.e. natural gas) is detected to reach a set explosion or poisoning alarm critical point, an alarm signal is sent out. The gas concentration can be quickly detected to reach the explosion or poison alarm set critical point to send out an alarm signal so as to remind the work to take safety measures and prevent explosion, fire and poisoning accidents. The combustible gas alarm 4 can be directly applied to the prior art. It will be appreciated that the explosion or poisoning alarm threshold may be set as desired.
In order to realize quick connection and disassembly, the tail end of the first high-pressure hose is provided with a pilot valve connecting female joint 11 which is matched and connected with the pilot valve guide pipe connecting port, and the tail end of the second high-pressure hose is provided with a main valve connecting female joint 13 which is matched and connected with the main valve guide pipe connecting port. The main valve connection female joint and the pilot valve connection female joint select appropriate screw joints according to the specification of the pilot operated safety valve, and the first high-pressure hose 10 and the second high-pressure hose 12 may be selected to be 1 meter, for example.
According to the on-line checking device for the portable explosion-proof miniature gas cylinder driving pilot operated safety valve, a corresponding on-line checking method is designed, and the on-line checking method comprises the following steps:
1) And opening the combustible gas alarm 4 to determine that the combustible gas alarm is normal.
2) And (3) connecting the portable control cabinet 15 with the portable high-pressure gas cylinder 1, slowly opening the gas source until the gas source is fully opened, observing the gas source pressure gauge 3, and determining whether the gas source pressure meets the checking requirement.
3) And selecting and installing a proper range calibration pressure gauge according to the principle that the setting pressure of the calibrated pilot valve is 1.5-3 times.
4) Closing the root stop valve below the pilot operated safety valve, slowly loosening the nut on the main valve guide pipe of the pilot operated safety valve, monitoring the exhaust sound at the position where the nut is loosened between the main valve and the guide pipe, and simultaneously paying attention to whether the combustible gas alarm 4 gives an alarm or not, and immediately stopping operation and locking and resetting the nut of the main valve guide pipe of the pilot operated safety valve if the alarm is given.
5) If the exhaust sound is continuously and unabated for a long time, a nut on a main valve guide pipe of the pilot operated safety valve is locked and reset, the root stop valve below the pilot operated valve is preliminarily judged to be damaged, and the root stop valve needs to be maintained and then is subjected to online verification.
6) If no exhaust sound is emitted, the nut on the guide pipe of the main valve of the pilot valve is locked and reset, the guide pipe of the pilot valve is preliminarily judged to be seriously blocked, and the on-line verification is carried out after the maintenance of the pilot valve.
7) If the exhaust sound is gradually reduced, the main valve connecting nut is continuously and slowly loosened until the exhaust sound is completely eliminated, the pilot valve connecting nut is started to be slowly loosened, and finally the connecting guide pipe between the main valve and the pilot valve is detached.
8) Selecting proper screw adapters, connecting the first high-pressure hose 10 and the second high-pressure hose 12 with the main valve and the pilot valve respectively, and checking whether the connection points are locked or not.
9) And closing the pressure release valve 14, slowly opening the check valve 5, observing the pressure of the pressure gauge, and closing the check valve 5 when the pressure is increased to 50% of the set pressure of the safety valve required by a user, and checking the tightness of all connecting pieces.
10 If there is leakage, the pressure release valve 14 is opened, the gas in the high-pressure hose is released until the pointer of the pressure gauge is zero, the leakage point is checked, the sealing connection is carried out again, and the step 9 is returned.
11 If no leakage exists, the pressure is slowly increased, and when the pressure is increased to 90% of the required setting pressure, the pressure increasing speed is less than 0.01MPa/S until the pressure is started. If the setting pressure does not meet the requirement, the check valve 5 is closed, the pressure relief valve 14 is opened to relieve the pressure to below 70% of the required setting pressure, the safety valve to be checked is adjusted to the specified setting pressure and is opened repeatedly for three times, and the constant pressure check is finished. And opening the pressure relief valve 14, closing the check valve 5 and making data recording.
12 Closing the pressure release valve 14, slowly opening the check valve 5, closing the check valve 5 when the pressure rises to 90% of the required set pressure, and checking whether leakage exists at each connection point. If no leakage exists, the pressure is maintained for 3 minutes, and whether the pointer of the pressure gauge descends or not is observed. If the pilot valve is not lowered, judging that the tightness of the calibrated pilot valve is qualified; if the pilot valve is lowered, the tightness of the corrected pilot valve is judged to be unqualified, and online checking is carried out after maintenance is needed.
The utility model discloses combine pilot-operated safety valve theory of operation, the pipe through connecting the pilot-operated safety valve realizes that pilot valve and main valve are opened and are closed to its pressure boost to the leakproofness of pressure and pilot valve and main valve is set to the pilot valve and the main valve of pilot-operated safety valve is checked. The utility model discloses the device is simple light, the check-up degree of accuracy is high, adaptable all kinds of complex environment, has overcome the difficult problem that current check-up equipment can not satisfy the check-up of guide's formula relief valve, has alleviateed check-up working strength promptly and has solved the safety protection problem of check-up cycle internal plant again.
The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.
Claims (3)
1. The portable explosion-proof miniature gas cylinder driving pilot operated safety valve on-line calibration device is characterized by comprising a portable high-pressure gas cylinder and a portable calibration control cabinet, wherein a first joint, a second joint, a gas source pressure gauge, a calibration valve, a pressure relief valve, a calibration pressure gauge and a three-way valve are arranged in the portable calibration control cabinet; the high-pressure gas cylinder connecting pipe is connected with the high-pressure gas cylinder, the check valve is connected with the pressure release valve, the check valve is further connected with the second connector, a pressure gauge mounting clamp and a check interface are arranged on the second connector, the pressure gauge mounting clamp is connected with the check pressure gauge, the check interface is connected with a high-pressure hose for checking, the high-pressure hose for checking is connected with one interface of the three-way valve, the other two interfaces of the three-way valve are respectively connected with the pilot valve through the first high-pressure hose, and the second high-pressure hose is connected with the main valve.
2. The portable on-line calibration device for the pilot operated safety valve driven by the explosion-proof micro gas cylinder as claimed in claim 1, wherein the portable calibration control cabinet is further provided with a combustible gas alarm which sends out an alarm signal when the concentration of the combustible gas reaches a set explosion or poisoning alarm critical point.
3. The portable on-line checking device for the pilot safety valve driven by the explosion-proof micro gas cylinder as claimed in claim 1, wherein the end of the first high pressure hose is provided with a pilot connection female joint which is in matching connection with the pilot conduit connection port, and the end of the second high pressure hose is provided with a main valve connection female joint which is in matching connection with the main valve conduit connection port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221440951.7U CN217765416U (en) | 2022-06-08 | 2022-06-08 | Portable explosion-proof miniature gas cylinder driving pilot-operated safety valve online calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221440951.7U CN217765416U (en) | 2022-06-08 | 2022-06-08 | Portable explosion-proof miniature gas cylinder driving pilot-operated safety valve online calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN217765416U true CN217765416U (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221440951.7U Active CN217765416U (en) | 2022-06-08 | 2022-06-08 | Portable explosion-proof miniature gas cylinder driving pilot-operated safety valve online calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217765416U (en) |
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2022
- 2022-06-08 CN CN202221440951.7U patent/CN217765416U/en active Active
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