Safety valve suitable for online verification

Abstract

The utility model discloses a safety valve suitable for on-line verification, which comprises a valve body with an inlet pipe and an outlet pipe, a valve core component arranged in the valve body, a valve rod connected with a valve core and used for opening and closing the valve core, a wireless signal transmitter, a pressure sensor and a flow sensor, the wireless module is in wireless connection with the online calibrator; the pressure sensor is connected with the pressure sensor interface on the inlet pipe and is used for measuring the real-time working pressure of the safety valve and transmitting a pressure signal to the online calibrator in real time through the wireless signal transmitter; and the flow sensor is connected with the flow sensor interface on the outlet pipe and is used for measuring the real-time flow of the safety valve and transmitting a flow signal to the on-line calibrator in real time through the wireless signal transmitter. The device can accurately measure the working pressure of the safety valve and is used for judging whether the safety valve is opened or not and judging the sealing performance of the valve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a safety valve. BACKGROUND

[0002] The current safety valve online inspection technology mainly uses the method of calculating the opening pressure of the safety valve by using the auxiliary opening device. The appearance of the safety valve online inspection technology greatly facilitates enterprises and ensures the continuous operation of equipment, solving many old and difficult problems. However, the mainstream safety valve online calibration still has the following problems:

[0003] 1. The real-time working pressure of the safety valve inlet used to provide the calculation basis data is inaccurate during the online calibration process, resulting in inaccurate calibration setting pressure;

[0004] 2. The safety valve diameter data used for calculation is inaccurate, resulting in inaccurate calibration setting pressure;

[0005] 3. The existing safety valve online calibration equipment lifting device, whether frame type or series type, uses multiple joints to meet different types of safety valves, which requires a large operation space and has many spare parts, making the online calibration instrument whole set of equipment heavy and inefficient, which is not conducive to on-site calibration work;

[0006] 4. The existing safety valve online calibration technology determines the valve opening by relying on the hearing and observation of the discharge port of the calibration personnel, and many sites do not have the conditions for manual judgment of opening, and cannot accurately determine the valve opening time;

[0007] 5. The existing safety valve online calibration technology basically relies on the hearing of the tester for the measurement of the sealing performance, but the calibration site often has a lot of noise and does not have the conditions;

[0008] 6. The existing safety valve online calibration equipment is connected by wire, and the operator is close to the valve, so if the medium leaks, it will cause damage to the operator's life safety. INVENTION CONTENTS

[0009] The technical problem to be solved by the utility model is to provide a safety valve suitable for online calibration, which solves the problem of fast and accurate online calibration of the safety valve.

[0010] To solve the above technical problems, the utility model adopts the following technical scheme:

[0011] A safety valve suitable for online calibration, comprising a valve body with an inlet pipe and an outlet pipe, a valve core assembly arranged in the valve body, a valve stem connected with the valve core for opening and closing the valve core, and the safety valve further comprising:

[0012] A wireless signal transmitter is mounted on the valve body and wirelessly connected with the online calibrator.

[0013] A pressure sensor is connected with the inlet pipe pressure sensor interface for measuring the real-time working pressure of the safety valve and transmitting the pressure signal to the online calibrator in real time through the wireless signal transmitter.

[0014] A flow sensor is connected with the outlet pipe flow sensor interface for measuring the real-time flow of the safety valve and transmitting the flow signal to the online calibrator in real time through the wireless signal transmitter.

[0015] Preferably, the pressure sensor is connected with a branch pipe connected with the pressure sensor.

[0016] Preferably, a stop valve is arranged between the branch pipe and the pressure sensor.

[0017] Preferably, the diameter of the branch pipe is smaller than that of the inlet pipe.

[0018] Preferably, the valve body is provided with a diameter data display area for displaying the diameter data in the valve body.

[0019] Preferably, the wireless signal transmitter is fixed with the flow sensor.

[0020] Preferably, the top of the valve body is connected with a valve rod lifting device for lifting the valve rod.

[0021] Preferably, the valve rod lifting device comprises a hydraulic oil cylinder and an oil cylinder sensor.

[0022] Preferably, the top of the valve rod is connected with a fixing nut.

[0023] Preferably, the top of the valve body is provided with a protective cover connecting thread connected with a safety valve protective cover covering the top of the valve rod.

[0024] The above technical scheme has the following beneficial effects:

[0025] The pressure sensor is connected with the inlet pipe pressure sensor interface for measuring the real-time working pressure of the safety valve and transmitting the pressure signal to the online calibrator in real time through the wireless signal transmitter.

[0026] In addition, the hydraulic oil cylinder is connected with the valve rod, and is used for lifting the valve rod to realize opening of the safety valve, and the setting pressure of the safety valve is calculated according to the force value measured by the oil cylinder sensor.

[0027] Since the valve body is provided with the middle diameter data display area for displaying the middle diameter data in the valve body, accurate middle diameter data can be provided, and calculation can be performed during online checking.

[0028] The specific technical scheme and beneficial effects of the utility model will be described in detail in the following specific embodiments in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The utility model will be further described below in combination with the drawings and specific embodiments:

[0030] Figure 1 It is the whole structure schematic diagram of the utility model;

[0031] In the drawing, the reference numerals are as follows: valve rod 1, fixed nut 2, valve rod lifting device 3, valve body 4, middle diameter data display area 5, wireless signal transmitter 6, flow sensor 7, outlet pipe 8, stop valve 9, pressure sensor 10, inlet pipe 11, protective cover connecting thread 12. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, and is by no means as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0033] Please refer to Figure 1 As shown in the figure, a safety valve suitable for online checking includes a valve body 4 with an inlet pipe 11 and an outlet pipe 8, a valve core assembly arranged in the valve body, a valve rod 1 connected with the valve core and used for opening and closing the valve core, and the above is the structure of a conventional safety valve. Compared with the conventional safety valve, the safety valve in the embodiment further includes a wireless signal transmitter 6, a pressure sensor 10 and a flow sensor 7.

[0034] The wireless signal transmitter 6 is installed on the valve body and wirelessly connected with the online calibrator. The pressure sensor 10 is connected with the pressure sensor on the inlet pipe and used to measure the real-time working pressure of the safety valve and transmit the pressure signal to the online calibrator in real time through the wireless signal transmitter. The flow sensor 7 is connected with the flow sensor on the outlet pipe and used to measure the real-time flow of the safety valve and transmit the flow signal to the online calibrator in real time through the wireless signal transmitter.

[0035] In the embodiment, the wireless signal transmitter connected with the pressure sensor 10 can be integrated together. Of course, they can also be fixed separately. The wireless signal transmitter connected with the flow sensor 7 is fixed separately.

[0036] Specifically, the pressure sensor is connected with a branch pipe, and the branch pipe is connected with the pressure sensor 10. A stop valve 9 is arranged between the branch pipe and the pressure sensor 10. The diameter of the branch pipe is smaller than that of the inlet pipe.

[0037] Further, the valve body 4 is provided with a diameter data display area 5 for displaying the diameter data of the valve body. In this way, accurate diameter data can be provided to facilitate calculation during online calibration.

[0038] In addition, the top of the valve body is connected with a valve rod lifting device 3 for lifting the valve rod. The valve rod lifting device 3 includes a hydraulic oil cylinder and an oil cylinder sensor. The hydraulic oil cylinder drives the valve rod, and the oil cylinder sensor measures the force of the oil cylinder lifting the valve rod. The top of the valve rod 1 is connected with a fixing nut 2, and the hydraulic oil cylinder drives the valve rod and the fixing nut to lift together. According to the detection principle of the prior art, the force value measured by the oil cylinder sensor is used to calculate the set pressure of the safety valve.

[0039] Further, the top of the valve body is provided with a protective cover connecting thread 12, which is connected with a safety valve protective cover. The safety valve protective cover covers the top of the valve rod. When online calibration is performed, the safety valve protective cover is removed.

[0040] When the safety valve is online checked, first, the safety valve protection cover connected through the protection cover connecting thread 12 is unscrewed, the valve rod lifting device 3 is installed on the valve rod 1, and the fixing nut 2 is tightened. The stop valve 9 is opened, whether the data received by the pressure sensor 10 and the flow sensor 7 of the online checking instrument meets the checking requirements is checked, the medium diameter data 5 of the valve is input in the checking instrument, and the checking preparation work is completed. The oil cylinder lifts the valve rod 1, when the lifting force added to the inlet pressure is equal to the safety valve spring pre-tightening force, the safety valve is opened, the flow sensor 7 measures the flow change and simultaneously verifies the opening of the safety valve through the displacement sensor built in the oil cylinder, the setting pressure of the safety valve is calculated by taking the force value measured by the oil cylinder 3 at this moment. After the safety valve is measured to start, the oil cylinder is relieved, the safety valve is reset, the sealing performance of the safety valve is qualitatively judged by comparing the data of the flow sensor 7 with the data before the safety valve is opened. After three times of pressure rising, take-off and reset operations, the average value of the three measured setting pressures is taken as the final checking data.

[0041] The safety valve online checking device can quickly and accurately check the safety valve, can judge the opening of the valve, can make the online checking completely meet the regulatory standard requirements of the safety valve checking, and can realize remote checking and guarantee the personal safety of the checking personnel.

[0042] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and the person skilled in the art should understand that the utility model includes but is not limited to the content described in the above specific embodiment. Any modification without deviating from the function and structural principle of the utility model will be included in the scope of claims.

Claims

1. A safety valve suitable for online verification, comprising a valve body having an inlet pipe and an outlet pipe, a valve core assembly arranged in the valve body, and a valve stem connected with the valve core for opening and closing the valve core, characterized in that, The safety valve further comprises a wireless signal transmitter mounted on the valve body and wirelessly connected with the online calibrator; a pressure sensor connected with the pressure sensor on the inlet pipe and used for measuring the real-time working pressure of the safety valve and transmitting the pressure signal to the online calibrator in real time through the wireless signal transmitter; and a flow sensor connected with the flow sensor on the outlet pipe and used for measuring the real-time flow of the safety valve and transmitting the flow signal to the online calibrator in real time through the wireless signal transmitter.

2. A safety valve suitable for online verification according to claim 1, characterized in that, The pressure sensor is connected with a branch pipe.

3. A safety valve suitable for in-line verification according to claim 2, characterized in that A stop valve is arranged between the branch pipe and the pressure sensor.

4. A safety valve suitable for in-line verification according to claim 2, characterized in that The diameter of the branch pipe is smaller than that of the inlet pipe.

5. A safety valve suitable for in-line verification according to claim 1, characterized in that, The valve body is provided with a middle diameter data display area for displaying the middle diameter data in the valve body.

6. A safety valve suitable for online verification according to claim 1, characterized in that, The wireless signal transmitter is fixed with the flow sensor.

7. A safety valve suitable for online verification according to claim 1, characterized in that, The top of the valve body is connected with a valve rod lifting device for lifting the valve rod.

8. A safety valve suitable for in-line verification according to claim 7, characterized in that The valve rod lifting device comprises a hydraulic oil cylinder and an oil cylinder sensor.

9. A safety valve suitable for in-line verification according to claim 7, characterized in that The top of the valve rod is connected with a fixing nut.

10. A safety valve suitable for online verification according to claim 1, characterized in that, The top of the valve body is provided with a protective cover connecting thread connected with a safety valve protective cover, which covers the top of the valve rod.

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