Safety valve online verification device and verification system

Abstract

The utility model relates to a safety valve on-line verification device and verification system, which comprises a base frame fixed on a safety valve mounting frame, a lead screw sleeve and a motor are arranged on the base frame, the lead screw sleeve is rotatably connected with the base frame, the motor controls the lead screw sleeve to rotate, an inner threaded hole is arranged in the lead screw sleeve and is used for being connected with a lead screw in a matched mode, and the lead screw sleeve is connected with the base frame. A tension sensor and a connecting frame are arranged at the end, connected with the safety valve, of the lead screw, a guide rod parallel to the lead screw is arranged on the connecting frame, and a displacement sensor for measuring the moving distance of the guide rod is arranged on the base frame. The safety valve on-line verification device can realize opening or forced closing of counting items of the safety valve without an additional device, is automatically controlled by software, uses a lead screw device as a lifting mechanism, does not need to use oil products, is slightly limited by working environments, has a power-loss reset function, and is convenient to use. Even if an accidental power failure occurs, the safety valve can automatically reset.

Description

Technical Field

[0001] The utility model relates to an online calibration device and a calibration system for a safety valve. Background Art

[0002] Traditional safety valve online verification equipment releases additional lifting force after verification. The safety valve being verified needs to rely on the closing force of its own spring to reset the valve closing part. If the safety valve cannot close automatically due to obstruction or insufficient closing force caused by excessive medium pressure in the valve, it is necessary to manually close the safety valve or wait for the medium in the protection system of the safety valve being verified to leak to a lower pressure and reset itself. However, manually closing the safety valve usually has a greater safety risk, so the method of waiting for the system pressure to drop before manually closing the safety valve is often used. Later, a verification device with the function of forcibly closing the safety valve appeared, but the device required an additional closing kit, which was bulky and difficult to use.

[0003] In addition, the additional lifting force of traditional safety valve online calibration equipment is provided by hydraulic pressure, which requires an additional manual or electric hydraulic pump and a certain amount of hydraulic oil to be brought into the work site. It is very cumbersome to carry, which limits it to some on-site working environments and on-site safety management regulations, such as high temperature and high-risk sites, which have strict restrictions on the entry of oil products into the factory. Utility Model Content

[0004] The embodiments of the utility model provide an online calibration device and a calibration system for a safety valve, so as to solve the problems in the prior art that the closing kit and the power device are relatively bulky, resulting in difficulty in use and limited scenarios.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] A safety valve online calibration device comprises a base frame fixed on a safety valve mounting frame, a screw sleeve and a motor being arranged on the base frame, the screw sleeve being rotatably connected to the base frame, the motor controlling the rotation of the screw sleeve, an internal threaded hole being arranged in the screw sleeve for matching and connecting with a screw, a tension sensor and a connecting frame being arranged at one end of the screw connected to the safety valve, the tension sensor being fixedly connected to a safety valve connector, a guide rod being parallel to the screw being arranged on the connecting frame, and a displacement sensor for measuring the moving distance of the guide rod being arranged on the base frame.

[0007] Furthermore, the motor and the displacement sensor are symmetrically arranged on both sides of the base frame.

[0008] Furthermore, connectors are symmetrically provided on both sides of the base frame, the connectors are fixedly connected to support columns, the bottom ends of the support columns are fixed on the safety valve mounting frame, and the angle between the connectors and the motor is 90°.

[0009] Furthermore, a guide sleeve for fitting the guide rod is provided on the base frame.

[0010] Furthermore, a cavity for accommodating a lead screw sleeve is provided in the base frame, a driving end of the motor extends into the cavity and is fixedly connected to a driving gear, and a passive gear meshingly connected to the driving gear is provided on the outer side of the lead screw sleeve.

[0011] Furthermore, one end of the tension sensor is fixedly connected to the lead screw, and the other end is fixedly connected to the safety valve connector.

[0012] Furthermore, the safety valve connector includes an adapter body and a mounting head, one end of the adapter body is fixedly connected to the tension sensor, and the other end of the adapter body is fixedly connected to the mounting head via a pin.

[0013] Furthermore, both upper and lower ends of the screw sleeve are rotatably connected to the base frame through bearings.

[0014] A safety valve online calibration system using a safety valve online calibration device comprises a safety valve online calibration device for receiving a control signal, using a motor to control the opening and closing of the safety valve, and using a tension sensor to collect tension changes during the opening process of the safety valve, and using a displacement sensor to collect the displacement of opening or closing.

[0015] The data acquisition card is used to receive the tension data collected by the tension sensor and the displacement sensor, and transmit it to the control center after analog-to-digital conversion.

[0016] The control center is used to receive the tension data and displacement data, process the data, output the verification results, and send the control signal of the motor.

[0017] The utility model embodiment has the following advantages:

[0018] The utility model provides an online safety valve calibration device that achieves the purpose of opening or forcibly closing the safety valve by controlling the forward and reverse rotation of the motor. No additional devices are required. The closing operation is automatically completed by software control. The motor and the displacement sensor are separated on both sides of the base frame, which can balance the forces around the base frame, making the overall equipment compact and easy to carry. The device uses a lead screw device as a lifting mechanism, does not require the use of oil, is less restricted by the working environment, and has a power-off reset function. Even if an unexpected power outage occurs, the safety valve can reset itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A product structure diagram of an online safety valve calibration device provided in Example 1 of the utility model;

[0022] Figure 2 for Figure 1 Bottom view of

[0023] Figure 3 for Figure 2 Middle AA section view;

[0024] Figure 4 for Figure 3 Structural diagram of the middle safety valve connector;

[0025] Figure 5 This is a system structure diagram of a safety valve online calibration system provided in Example 2 of the utility model.

[0026] In the figure:

[0027] 1. Safety valve mounting frame; 2. Base frame; 3. Motor; 4. Screw sleeve; 5. Screw; 6. Tension sensor; 7. Connecting frame; 8. Safety valve connector; 9. Displacement sensor; 10. Guide rod; 11. Connecting head; 12. Support column; 13. Guide sleeve; 14. Driving gear; 15. Passive gear; 16. Data acquisition card; 17. Control center; 18. Adapter; 19. Mounting head; 20. Pin. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1-3 As shown, an online calibration device for a safety valve comprises a base frame 2 fixed on a safety valve mounting frame 1, a screw sleeve 4 and a motor 3 being provided on the base frame 2, the screw sleeve 4 being rotatably connected to the base frame 2, and the upper and lower ends of the screw sleeve 4 in this embodiment are rotatably connected to the base frame 2 through bearings, the motor 3 controls the rotation of the screw sleeve 4, an internal threaded hole is provided in the screw sleeve 4 for matching and connecting a screw 5, a tension sensor 6 and a connecting frame 7 are provided on one end of the screw 5 connected to the safety valve, one end of the tension sensor 6 is fixedly connected to the screw 5, and the other end is fixedly connected to the safety valve connector 8, a guide rod 10 parallel to the screw 5 is provided on the connecting frame 7, and a displacement sensor 9 for measuring the moving distance of the guide rod 10 is provided on the base frame 2. The servo motor 3 rotates slowly and uniformly in the forward direction, driving the screw sleeve 4 to rotate and driving the screw 5 to rise slowly. At this time, the guide rod 10 rises synchronously with the screw 5. When the tension sensor 6 outputs tension data, the displacement sensor 9 starts to measure the displacement of the head of the guide rod 10. When the displacement exceeds the displacement threshold, it is determined that the safety valve to be calibrated is open. During this period, the tension sensor 6 continuously collects the tension change value, and combines the data of the tension sensor 6 and the displacement sensor 9 to obtain the actual set pressure of the safety valve. After determining that the safety valve is open, the control center 17 sends a signal to control the servo motor 3 to reverse. At this time, the screw 5 descends and the guide rod 10 descends synchronously. When the displacement sensor 9 detects that the guide rod 10 returns to the initial position, the screw 5 also returns to the initial position, achieving the effect of forcibly closing the safety valve. Finally, the motor 3 stops and the calibration work cycle is completed.

[0031] Specifically, Figure 4As shown, the lower end of the lead screw 5 is threadedly connected to the connecting frame 7. In this embodiment, the tension sensor 6 adopts a spoke sensor. The countersunk holes around the spoke sensor are fixedly connected to the connecting frame 7, and the central screw hole of the spoke sensor is fixedly connected to the safety valve connecting head 8. The safety valve connecting head 8 includes an adapter body 18 and a mounting head 19. One end of the adapter body 18 is threadedly connected to the central screw hole of the tension sensor 6, and the other end is fixedly connected to the mounting head 19 through a pin 20. The lower end of the mounting head 19 is provided with a threaded hole, which is threadedly connected to the safety valve stem thread. The mounting head 19 can be provided with a variety of threaded holes for matching with safety valve stem threads of different specifications. The adapter body is fixedly connected by a pin to achieve a unified safety valve stem connection structure.

[0032] The motor 3 and the displacement sensor 9 are symmetrically arranged on both sides of the base frame 2. On the one hand, the forces on both sides of the base frame 2 are balanced. On the other hand, the distance between the lead screw 5 mechanism in the middle and the motor 3 and the displacement sensor 9 is the shortest, so that the overall device structure is compact and the volume is minimized. Further, connectors 11 are symmetrically arranged on both sides of the base frame 2. The connectors 11 are fixedly connected to the support columns 12. The bottom ends of the support columns 12 are fixed on the safety valve mounting frame 1. The angle between the connector 11 and the motor 3 is 90°, which is used to balance the forces around the base frame 2, so that the overall device structure is compact, the volume is minimized, and it is easy to carry.

[0033] The base frame 2 is provided with a guide sleeve 13 which is fitted over the guide rod 10 . The guide sleeve 13 is provided with a through hole, and the guide rod 10 passes through the through hole. The guide sleeve 13 limits the lateral freedom of the guide rod 10 and guides the guide rod 10 to move up and down, so as to increase the stability of the guide rod 10 .

[0034] The base frame 2 is provided with a cavity for accommodating the screw sleeve 4, the driving end of the motor 3 extends into the cavity and is fixedly connected to the driving gear 14, and the outer sleeve of the screw sleeve 4 is provided with a passive gear 15 meshing with the driving gear 14. The reduction gear set is arranged in the cavity to play a protective role and prevent external impurities from being mixed in, external collisions and other problems.

[0035] Example 2

[0036] like Figure 4 As shown, a safety valve online calibration system using a safety valve online calibration device includes a safety valve online calibration device for receiving a control signal, using a motor 3 to control the opening and closing of the safety valve, and using a tension sensor 6 to collect tension changes during the opening process of the safety valve, and using a displacement sensor 9 to collect the displacement of opening or closing.

[0037] The data acquisition card 16 is used to receive the tension data collected by the tension sensor 6 and the displacement sensor 9 and transmit it to the control center 17 after analog-to-digital conversion.

[0038] The control center 17 is used to receive the tension data and displacement data, and perform data processing, analyze, calculate, and display related information, output the verification result according to the transmitted data and the software calibration program, and output the servo motor 3 control signal to the servo driver.

[0039] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A safety valve online calibration device, comprising a base frame fixed on a safety valve mounting frame, characterized in that: A screw sleeve and a motor are provided on the base frame. The screw sleeve is rotatably connected to the base frame. The motor controls the rotation of the screw sleeve. An internal threaded hole is provided in the screw sleeve for matching and connecting the screw. A tension sensor and a connecting frame are provided at one end of the screw connected to the safety valve. The tension sensor is fixedly connected to the safety valve connector. A guide rod parallel to the screw is provided on the connecting frame. A displacement sensor for measuring the moving distance of the guide rod is provided on the base frame.

2. The safety valve online verification device according to claim 1 is characterized in that: The motor and the displacement sensor are symmetrically arranged on both sides of the base frame.

3. The safety valve online verification device according to claim 2 is characterized in that: Connectors are symmetrically arranged on both sides of the base frame, the connectors are fixedly connected to support columns, the bottom ends of the support columns are fixed on the safety valve mounting frame, and the angle between the connectors and the motor is 90°.

4. The safety valve online calibration device according to claim 1, characterized in that: The base frame is provided with a guide sleeve which is fitted with a guide rod.

5. The safety valve online verification device according to claim 1 is characterized in that: The base frame is provided with a cavity for accommodating the lead screw sleeve, the driving end of the motor extends into the cavity and is fixedly connected to the driving gear, and the outer side of the lead screw sleeve is provided with a passive gear meshing with the driving gear.

6. The safety valve online verification device according to claim 1 is characterized in that: One end of the tension sensor is fixedly connected to the lead screw, and the other end is fixedly connected to the safety valve connector.

7. The safety valve online verification device according to claim 1 is characterized in that: The safety valve connector includes an adapter body and a mounting head. One end of the adapter body is fixedly connected to the tension sensor, and the other end is fixedly connected to the mounting head through a pin.

8. The safety valve online verification device according to claim 1, characterized in that: The upper and lower ends of the screw sleeve are rotatably connected to the base frame through bearings.

9. A safety valve online calibration system using a safety valve online calibration device, characterized in that: Includes the following structures: The safety valve online calibration device is used to receive the control signal, use the motor to control the opening and closing of the safety valve, and use the tension sensor to collect the tension change during the opening process of the safety valve, and use the displacement sensor to collect the displacement of opening or closing; The data acquisition card is used to receive the tension data collected by the tension sensor and the displacement sensor, and transmit it to the control center after analog-to-digital conversion; The control center is used to receive the tension data and displacement data, process the data, output the verification results, and send the control signal of the motor.

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