CN219282572U

CN219282572U - Pressure setting device for pilot operated safety valve

Info

Publication number: CN219282572U
Application number: CN202320161904.7U
Authority: CN
Inventors: 罗炜
Original assignee: Haiyan Woqi Electromechanical Equipment Co ltd
Current assignee: Haiyan Woqi Electromechanical Equipment Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-06-30
Anticipated expiration: 2033-01-13

Abstract

The utility model discloses a pilot-operated safety valve pressure setting device, which comprises a pressurizing table and a setting instrument, wherein: the pressure-relieving platform comprises a water tank and a pressure-relieving unit, the pressure-relieving unit comprises an energy storage module, a pressure output module, a water pump and a pressure-relieving module, the pressure-relieving module comprises a slow pressure-relieving switch valve and a fast pressure-relieving valve which are arranged in parallel, the pressure output module comprises an output switch valve, a filter and a pressure output interface, the energy storage module comprises an energy accumulator, an energy accumulator pressure-increasing valve is arranged between the input end of the energy accumulator and the water pump, a slow pressure-increasing switch valve is arranged between the output end of the energy accumulator and the output switch valve, and the water pump is connected with the output switch valve, the energy accumulator pressure-increasing valve and the pressure-relieving module; the setting instrument includes first pressure transmitter and second pressure transmitter, pressure output module is connected to first pressure transmitter, and the second pressure transmitter is connected to the main valve, the utility model discloses can carry out hydraulic pressure setting to the guide's relief valve, possess slow pressure boost and slow pressure release function.

Description

Pressure setting device for pilot operated safety valve

Technical Field

The utility model belongs to the technical field of pilot-operated safety valve checking mechanisms, and particularly relates to a pilot-operated safety valve pressure setting device.

Background

The pilot operated safety valve is different from a common spring type safety valve, and is a valve with a valve body controlled by a pilot valve to act, and is generally used for key parts of a nuclear power station.

The pressure setting process of the pilot operated safety valve is also different from the common spring type safety valve, the common spring type safety valve only needs to measure the opening constant value of the valve, and the pressure setting process of the pilot operated safety valve needs to measure the opening constant value and the closing constant value of the valve, and meanwhile, the constant value is required to be more accurate.

The common spring type safety valve checking table can detect the opening fixed value of the common spring type safety valve and can not detect the closing fixed value, and can not detect the opening fixed value and the closing fixed value of the pilot type safety valve when using gas as a medium normally.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the pilot-operated safety valve which can set the water pressure, has the functions of slow pressurization and slow pressure relief, and can accurately and safely detect the opening fixed value and the closing fixed value of the safety valve.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a guide's relief valve pressure setting device, includes platform and the setting instrument of pressing, wherein:

the pressure output module comprises an output switch valve, a filter and a pressure output interface, the energy storage module comprises an energy accumulator, an energy accumulator booster valve is arranged between the input end of the energy accumulator and the water pump, a slow booster switch valve is arranged between the output end of the energy accumulator and the output switch valve, one end of the water pump is connected with the water tank, and the other end of the water pump is simultaneously connected with the output switch valve, the energy accumulator booster valve and the pressure release module;

the setting instrument comprises a first pressure transmitter and a second pressure transmitter, wherein the first pressure transmitter is connected with the pressure output module to detect the pressure of the pressure output module, and the second pressure transmitter is connected to the main valve to detect the pressure of the main valve.

A boost regulating valve is further arranged between the energy accumulator and the slow boost switching valve.

Further the accumulator is connected with a safety valve.

And a pressure relief regulating valve is further arranged behind the slow pressure relief switching valve.

The pressurizing unit further comprises an air pressurizing module, the air pressurizing module comprises an air inlet, the air inlet outputs two paths, the first path is connected to a water pump, the second path is connected to an output switch valve and an accumulator pressurizing valve, and the water pump is an air-driven liquid pump.

And a first path between the pressure air inlet and the water pump is further provided with a pressure air switching valve and a pressure air regulating valve.

Further, the second path is provided with an air charge switch valve and a check valve.

Further the platform of suppressing still includes the storage tank, water tank, suppress unit and storage tank from bottom to top arranges in proper order.

Compared with the prior art, the utility model has the beneficial effects that: the pilot type safety valve can be set for hydraulic pressure, has the functions of slow pressurization and slow pressure relief, is convenient to transfer and use by virtue of a combination mode of a plurality of boxes, has the functions of compressed air purging equipment, and can introduce compressed air into the equipment by opening the air injection valve.

Drawings

FIG. 1 is a schematic diagram of the connection of a pressurizing table, a setter and a pilot operated safety valve;

FIG. 2 is a schematic diagram of a pressing unit according to the present utility model

Fig. 3 is a schematic diagram of the setter of the present utility model.

Reference numerals: 1. setting instrument; 11. a first pressure transmitter; 12. a second pressure transmitter; 13. a data collector; 14. a storage battery; 15. a computer; 16. a micro printer; 2. a pressing table; 211. an accumulator; 212. an accumulator charge valve; 213. a boost regulating valve; 214. a slow boost switch valve; 215. a safety valve; 216. an accumulator pressure gauge; 221. an output switch valve; 222. a high pressure filter; 223. an output interface; 231. a slow pressure release switch valve; 232. a quick pressure release valve; 233. a pressure relief regulating valve; 234. a pressure relief outlet; 241. a pressure air inlet; 242. a pressure switch valve; 243. a pressure regulating valve; 245. an air charge on-off valve; 246. a check valve; 3. a water pump; 31. a burst valve; 32. a water pump pressure gauge; 51. a pilot valve; 511. a valve A; 512. A valve B; 52. and a main valve.

Detailed Description

An embodiment of the pilot operated relief valve pressure setting device of the present utility model will be further described with reference to fig. 1 to 3.

In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.

The utility model provides a guide's relief valve pressure setting device, includes platform 2 and setting instrument 1 of beating, wherein:

the pressurizing table 2 comprises a water tank and a pressurizing unit, the pressurizing unit comprises an energy storage module, a pressure output module, a water pump 3 and a pressure relief module, the pressure relief module comprises a slow pressure relief switch valve 231 and a fast pressure relief valve 232 which are arranged in parallel, the pressure output module comprises an output switch valve 221, a filter and a pressure output interface 223, the energy storage module comprises an energy storage device 211, an energy storage device pressurizing valve 212 is arranged between the input end of the energy storage device 211 and the water pump 3, a slow pressure boost switch valve 214 is arranged between the output end of the energy storage device 211 and the output switch valve 221, one end of the water pump 3 is connected with the water tank, and the other end of the water pump 3 is simultaneously connected with the output switch valve 221, the energy storage device pressurizing valve 212 and the pressure relief module;

the pressure release module further comprises a pressure release outlet 234, the slow pressure release switch valve 231 and the fast pressure release switch valve are both connected with the pressure release outlet 234, the pressure release outlet 234 is connected with the water tank through a transparent pipe, and the transparent pipe is used for observing whether medium flows in the pressure release module.

The regulator 1 comprises a first pressure transmitter 11 and a second pressure transmitter 12, wherein the first pressure transmitter 11 is connected with a pressure output module for detecting the pressure of the pressure output module, and the second pressure transmitter 12 is connected to a main valve 52 for detecting the pressure of the main valve 52.

A burst valve 31 is connected behind the water pump 3 in this embodiment to prevent a system from operating erroneously in excess pressure, when the system is over-pressurized, the burst valve 31 breaks, and a water pump pressure gauge 32 is provided behind the water pump 3 for observing the output liquid pressure of the water pump 3.

In order to clean the water entering the pilot operated relief valve 215, a high pressure filter 222 is preferably provided after the output switching valve 221.

In the embodiment, the water tank is connected with the water pump 3 through a water pipe, quick plugs are arranged at two ends of the water pipe, the water outlet port is arranged at the lower side, a filter screen is arranged in the water tank, and the water entering the pressurizing unit is ensured to be clean; the side surface of the water tank is provided with a liquid level meter for observing the liquid level in the water tank; meanwhile, a backwater interface is further arranged above the side of the water tank, so that the decompression water of the compression unit is guaranteed to return to the water tank.

A boost regulator 213 is preferably disposed between the accumulator 211 and the slow boost switch valve 214 in this embodiment to regulate and control the boost speed.

The energy accumulator 211 is preferably connected with a safety valve 215, so that the energy accumulator 211 cannot be used in an overpressure mode, and the safety risk of the overpressure of the energy accumulator 211 is avoided; while the accumulator 211 is connected with an accumulator pressure gauge 216 to detect the pressure of the accumulator 211 in real time.

The pressure release adjusting valve 233 is further disposed behind the slow pressure release switching valve 231 for adjusting and controlling the pressure release speed.

In one embodiment, the pressurizing unit further includes a pressure-increasing module, the pressure-increasing module includes a pressure-increasing inlet 241, the pressure-increasing inlet 241 is used for connecting a high-pressure air source, the pressure-increasing inlet 241 outputs two paths, a first path is connected to the water pump 3, a second path is connected to the output switch valve 221 and the accumulator pressure-increasing valve 212, and the water pump 3 is a gas-driven liquid pump.

The first path between the pressure air inlet 241 and the water pump 3 is provided with a pressure air switching valve 242 and a pressure air regulating valve 243.

The inlet water end of the water pump 3 is connected with water led from the water tank, compressed air enters the pressurizing unit from the pressure air inlet 241, and enters the pump driving gas inlet end after passing through the filter and the oil mist separator, the pressure air switch valve 242 and the pressure air regulating valve 243 are used for switching on and off of pressure air, the pressure air regulating valve 243 is used for regulating the air supply pressure of the downstream pump, the output liquid pressure of the pump is regulated, the pump is driven by the control and regulation system, water in the water tank is pumped into the pressure side, and the water entering the water pump 3 is guaranteed to be clean by the filter screen in the water tank.

The second path is provided with a charge air switch valve 245 and a check valve 246, compressed air can enter the pressure output end through the charge air switch valve 245 and the check valve 246, and the check valve 246 ensures that medium can only enter inwards and cannot return to the pressure inlet end.

The pilot type safety valve 215 includes two parts of a pilot valve 51 and a main valve 52, as in the applicant's prior application, publication No. CN112594421a, a pilot valve structure of the pilot type safety valve 215 is disclosed, namely, "pilot valve 51" described in this embodiment, and the pilot valve 51 includes two parts of a valve a511 and a valve B512 as shown in fig. 1, the valve a511 and the valve B512 correspond to the positions of the first needle valve and the second needle valve in CN112594421a, respectively.

Before tuning, pilot valve 51 is connected to pressure output port 223, first pressure transmitter 11 is connected to the line between pilot valve 51 and high pressure filter 222, and second pressure transmitter 12 is connected to main valve 52.

And (3) a pressure setting process:

1) Before the pilot-operated safety valve 215 is pressure-set, the output switch valve 221 and the pressure relief module are closed, the accumulator pressure-increasing valve 212 is opened, the pressure is opened, the water pump 3 is driven to increase the pressure of the accumulator 211, the pressure of the accumulator 211 can be read from the accumulator pressure gauge 216, the pressure value of the accumulator 211 is required to be higher than the opening fixed value of the pilot valve 51, and the accumulator pressure-increasing valve 212 is closed after the pressure of the accumulator 211 is charged.

2) The output switch valve 221 is opened, the water pump 3 is driven to start up the device pressure to approach the opening constant value of the pilot valve 51, and the water pump 3 is turned off.

3) The slow pressure boost switching valve 214 is opened, the pressure boost regulating valve 213 is adjusted, the pressure of the accumulator 211 slowly flows into the pilot valve 51 through the pressure boost regulating valve 213, and the pressure boost speed is required to be adjusted to a suitable slow pressure boost state.

4) The pilot valve 51 jumps during the slow pressurization, and the valve opening value is detected by the pressure regulator 1.

Specifically, when the pressure of the pressurizing table 2 is smaller than the closing fixed value of the pilot valve 51, the valve A511 of the pilot valve 51 is opened, the valve B512 is closed, the pressure of the pressurizing table 2 is connected with the valve head of the main valve 52 through the valve A511, and at the moment, the pressure values of the first pressure transmitter 11 and the second pressure transmitter 12 are the same; when the pressure of the pressurizing table 2 is larger than the opening fixed value of the pilot valve 51, the valve A511 is closed, the valve B512 is opened, the pressure of the pressurizing table 2 cannot be connected with the valve head of the main valve 52, the valve head of the main valve 52 is connected with the atmosphere through the valve B512, the pressure is normal pressure, and the main valve 52 is opened; at this time, the first pressure transmitter 11 is the pressure of the pressing table 2, that is, the pressure of the pilot valve 51 at the moment, the second pressure transmitter 12 is normal pressure, the opening pressure of the pilot valve 51 is the pressure value of the first pressure transmitter 11 corresponding to the moment when the pressure of the second pressure transmitter 12 is reduced, and at this time, the pressure value of the first pressure transmitter 11 is the valve opening constant value.

In this embodiment, a host (computer 15) may be disposed in the setting apparatus 1, and is connected to the first pressure transmitter 11 and the second pressure transmitter 12, so as to obtain and record pressure values of the two in real time, and also can be drawn into a curve form by software to facilitate recording and representation.

5) The slow pressure-increasing switch valve 214 is closed, the slow pressure-releasing switch valve 231 is opened, the slow pressure-releasing regulating valve 233 is regulated, the pressure in the equipment slowly flows into the pressure-releasing outlet 234 of the pressurizing table 2 through the pressure-increasing regulating valve 213, and the pressure-releasing speed is required to be regulated to a proper slow pressure-releasing state.

6) The relief valve 215 is closed during the slow pressure relief, and the valve closing setpoint is detected by the pressure regulator 1.

Specifically, the pressurizing table 2 is operated to slowly lower the pressure, when the pressure of the pressurizing table 2 is the closing pressure of the safety valve 215, the valve B512 is closed, the valve A511 is opened, the pressure of the pressurizing table 2 is communicated with the valve head of the main valve 52, and the pressure of the first pressure transmitter 11 and the pressure of the second pressure transmitter 12 are the same. The closing pressure of the pilot valve 51 is the corresponding pressure value of the first pressure transmitter 11 when the pressure of the first pressure transmitter 11 suddenly drops at the moment of opening the pilot valve 51A, and the pressure value of the first pressure transmitter 11 at this time is the valve closing constant value.

In one embodiment, the pressing table 2 further includes a storage box, where the water tank, the pressing unit and the storage box are sequentially arranged from bottom to top, and other special tools are needed for setting the storage box.

As shown in fig. 3, which is a schematic diagram of the setter 1 in the present application, the first pressure transmitter 11 and the second pressure transmitter 12 transmit electric signals to the data collector 13 through cables, the data collector 13 transmits pressure constant value information to the computer 15 through data processing, and the pressure value is displayed in the pilot valve 51 setting software written in the computer 15.

The high capacity battery 14 powers the data collector 13, the computer 15 and the micro printer 16, and the micro printer 16 prints a report of each test on site.

In one embodiment the pilot valve 51 tuning software may be as follows:

the display interface of the display has real-time pressure display of the first pressure transmitter 11 and the second pressure transmitter 12, has real-time display of pressure curves, and has time on the abscissa and pressure on the ordinate, and the interval between the abscissa and the ordinate can be manually changed.

The valve device position number for which the test is being performed can be displayed while giving the upper and lower limits of valve opening and closing.

The automatic calculation instruction of the rising and falling rate of the first pressure transmitter 11 is provided, when the rising and falling rate of the first pressure transmitter 11 is within the acceptable range, the cursor is displayed as a green light, and when the rising and falling rate of the first pressure transmitter 11 is within the unacceptable range, the cursor is displayed as a red light.

The software can automatically judge the opening and closing values according to the curve, can also manually operate the curve, has the automatic judgment of the setting result, and can automatically store the test curve and data.

The pilot-operated safety valve 215 is arranged in the other display interface of the display, so that the pilot-operated safety valve 215 can be subjected to pressure maintaining detection, the real-time pressure display of the first pressure transmitter 11 and the second pressure transmitter 12 is arranged in the pressure maintaining interface, the real-time display of the pressure curve is realized, the time is in the abscissa, the pressure is in the ordinate, and the interval between the abscissa and the ordinate can be manually changed.

The dwell time may be set manually.

The real-time pressure drop and the total average pressure drop of first pressure transmitter 11 and second pressure transmitter 12 are automatically given.

The valve equipment position number of the test being carried out can be displayed, and the pressure maintaining curve and data can be automatically stored.

The pilot valve 51 tuning software also has a database function, so that a technician can perfect valve and sensor data in advance, and after the equipment information is perfected in the database, all parameter information of the valve can automatically appear after the parameter setting and selecting equipment codes.

The method is also preferably provided with a history inquiry function, can inquire pressure setting history data and pressure maintaining test history curves by comparing the history trends of similar equipment or the same equipment, and can inquire test records meeting the conditions according to the information such as test time, equipment position number, overhaul number, factory code, unit and the like.

A history list of test data may be derived and unusable history data may be deleted.

A maintenance report for the device may be derived.

The pilot valve 51 setting software also has the functions of outputting a maintenance report and micro printing, and can print the maintenance report on site, wherein the maintenance report contains all equipment information and data obtained by the test in the experiment. The device information includes: the device code, test time, factory code, overhaul number, height difference, boss step, first pressure transmitter 11 and second pressure transmitter 12 sensor code, valve opening and closing fixed values and upper and lower limit values, actual opening and closing values of the safety valve 215, and pressure fixed value units are not limited to bar, MPa and the like. And giving a conclusion as to whether the test is qualified or not, and a work group responsible person and a verification signature.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a guide's relief valve pressure setting device which characterized in that, including pressing platform and setting instrument, wherein:

2. The pilot operated relief valve pressure setting device according to claim 1, wherein: a boost regulating valve is arranged between the energy accumulator and the slow boost switching valve.

3. The pilot operated relief valve pressure setting device according to claim 2, wherein: the energy accumulator is connected with a safety valve.

4. A pilot operated relief valve pressure setting device according to claim 2 or 3, characterized in that: and a pressure relief regulating valve is further arranged behind the slow pressure relief switch valve.

5. The pilot operated relief valve pressure setting device according to claim 4, wherein: the pressurizing unit further comprises an air pressurizing module, the air pressurizing module comprises an air inlet, the air inlet outputs two paths, the first path is connected to a water pump, the second path is connected to an output switch valve and an energy accumulator pressurizing valve, and the water pump is an air-driven liquid pump.

6. The pilot operated relief valve pressure setting device according to claim 5, wherein: the first path between the pressure air inlet and the water pump is provided with a pressure air switching valve and a pressure air regulating valve.

7. The pilot operated relief valve pressure setting device according to claim 6, wherein: the second path is provided with an air charge switch valve and a check valve.

8. The pilot operated relief valve pressure setting device according to claim 7, wherein: the pressing table further comprises a storage box, and the water tank, the pressing unit and the storage box are sequentially arranged from bottom to top.