An on-line calibration device for a pilot operated safety valve

Abstract

The utility model relates to the technical field of pilot safety valve, and disclose a kind of pilot safety valve on-line calibration device, including metal shell, the upper surface of the metal shell is fixedly connected with hydraulic oil cylinder, one side of the hydraulic oil cylinder is equipped with connecting pipeline, the inside of the connecting pipeline is provided with movable cavity, the inner wall of the movable cavity is provided with lever pressure component, the other side of the hydraulic oil cylinder is fixedly connected with hydraulic connector.The pilot safety valve on-line calibration device, by the setting of lever pressure component, the synergic cooperation of multiple groups of articulated rods and rubber blocks, the pressure of amplification hydraulic oil cylinder can be stably transmitted, and under the limiting effect of limiting block, ensure that pressure is evenly applied, while the pressure gauge is directly communicated with the connecting pipeline movable cavity, the pressure sensor is communicated with the hydraulic oil cylinder cavity, the effect of enhanced pressure is formed, to provide more accurate reference for measurement and reduce data error, significantly improve calibration accuracy.

Description

Technical Field

[0001] This utility model relates to the field of pilot-operated safety valve technology, and in particular to an online calibration device for pilot-operated safety valves. Background Technology

[0002] The online calibration device for pilot-operated safety valves is a specialized device that allows for precise detection and calibration of key indicators such as opening pressure, reseating pressure, and sealing performance of pilot-operated safety valves without disassembling the safety valves and under normal equipment operation. It achieves this by simulating the pilot mechanism triggering logic, applying external calibration force, or monitoring valve disc action parameters. Its core principle is to utilize the structural characteristics of pilot-operated safety valves that pilot-control the main valve. Through controllable signal input or force loading, it verifies the safety valve's safety relief function and consistency with set parameters without affecting system operation, providing real-time and reliable calibration data support for safe equipment operation.

[0003] However, existing pilot-operated safety valve online calibration devices have the following drawbacks: (1) Some existing pilot-operated safety valve online calibration devices have a core shortcoming of relying on computer data. Although computer data has advantages such as intuitiveness and traceability, the key links of such devices, such as pressure measurement, parameter calculation and result output, all rely heavily on the internal electrical components of the computer. Once these electrical components are damaged due to aging, failure or external interference, it will not only directly lead to the interruption of calibration work, but also seriously affect the accuracy of pressure measurement, making it difficult to accurately judge the core indicators such as the opening pressure and reseating pressure of the safety valve, which brings potential risks to the safe operation of the equipment. (2) Some existing pilot-operated safety valve online calibration devices have deficiencies in the pipeline connection link. The connection between the oil pipe and the hydraulic joint mainly relies on manual operation. If the fit is not properly controlled or the fixing force is uneven during installation, it is very easy to cause poor sealing at the connection and unstable connection, which in turn causes hydraulic oil leakage and affects the accuracy of pressure measurement.

[0004] Therefore, this utility model provides an online calibration device for pilot-operated safety valves. Utility Model Content

[0005] (a) Technical problems to be solved The problem solved by this utility model is to provide a highly practical online calibration device for pilot-operated safety valves, which solves the problem of unstable pressure measurement caused by damage to electrical components and unstable pipeline connections mentioned in the background art.

[0006] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: a pilot-operated safety valve online calibration device, comprising a metal shell, a hydraulic cylinder fixedly connected to the upper surface of the metal shell, a connecting pipe installed on one side of the hydraulic cylinder, a movable cavity provided inside the connecting pipe, a lever pressure assembly provided on the inner wall of the movable cavity, and a hydraulic connector fixedly connected to the other side of the hydraulic cylinder, with a fastening assembly provided on the surface of the hydraulic connector; The lever pressure assembly includes a limiting block fixedly connected to the bottom wall of the movable cavity, a rubber block movably connected to the top wall of the movable cavity, a connecting hole on the surface of the limiting block, a first connecting rod movably passing through the inner wall of the connecting hole, a first hinge rod hinged to one end of the first connecting rod, a hinge block hinged to one end of the first hinge rod, a hinge groove on the surface of the hinge block, a second hinge rod hinged to the inner wall of the hinge groove, a connecting block hinged to one end of the second hinge rod, and a rubber block fixedly connected to the upper surface of the hinge block. The fastening assembly includes two semi-circular sleeves fitted onto the surface of the hydraulic connector. The number of semi-circular sleeves is two and they are arranged symmetrically. A second connecting rod is fixedly connected to one side of each of the two semi-circular sleeves. A connecting sleeve is movably fitted onto the surface of the second connecting rod. A connecting piece is fixedly connected to the other side of the semi-circular sleeve. A first rotating block is fixedly connected to the other side of the other semi-circular sleeve. A second rotating block is fixedly connected to one side of the connecting piece. A rectangular limiting ring is rotatably connected to the center of the first rotating block and the second rotating block.

[0007] Optionally, a hydraulic connector is fixedly connected to one side of the hydraulic cylinder. The hydraulic connector is sealed and connected to an external hydraulic supply device to achieve stable transmission of pressure medium, and its outer circumferential surface is tightly fitted to the inner wall of the semi-circular sleeve.

[0008] Optionally, a hydraulic hose is fixedly sleeved on one side of the hydraulic joint. The hydraulic hose is made of rubber, which is flexible and bendable, adaptable to complex pipeline routes, and suitable for medium and high pressure conditions.

[0009] Optionally, a pressure gauge is installed at one end of the connecting pipe. The pressure gauge is connected to the internal movable cavity of the connecting pipe, which can monitor the pressure change in the cavity in real time during the calibration process and provide accurate feedback.

[0010] Optionally, a pressure sensor is fixedly connected to the upper surface of the hydraulic cylinder. The pressure sensor is in communication with the internal cavity of the hydraulic cylinder and can collect the cylinder output pressure data in real time and transmit it to an external control terminal.

[0011] Optionally, the interior of the metal casing is provided with a movable groove, and a spring is movably connected to the inner wall of the movable groove. The spring is made of high carbon steel.

[0012] (III) Beneficial Effects This utility model provides an online calibration device for a pilot-operated safety valve, which has the following advantages: 1. This pilot-operated safety valve online calibration device, through the setting of the lever pressure component and the coordinated cooperation of multiple sets of hinged rods and rubber blocks, can smoothly transmit and amplify the pressure of the hydraulic cylinder. Under the limiting action of the limit block, it ensures uniform pressure application. At the same time, the pressure gauge is directly connected to the moving chamber of the connecting pipe, and the pressure sensor is connected to the hydraulic cylinder cavity, forming an enhanced pressure effect. This provides a more accurate reference for measurement, reduces data errors, and significantly improves calibration accuracy.

[0013] 2. This pilot-operated safety valve online calibration device, through the setting of fastening components, has two symmetrical semi-circular sleeves fitting against the outer circumference of the connector. Axial fixation is achieved through the cooperation of the second connecting rod and the connecting sleeve. Then, the rectangular limit ring and the rotating block are linked to lock, which can quickly complete the stable connection between the oil pipe and the connector. This fastening structure does not rely on manual precise control of the force, which can effectively solve the problem of hydraulic oil leakage caused by unstable manual connection. It not only ensures the continuity of pressure transmission, but also saves hydraulic oil resources and avoids environmental pollution. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pressure gauge structure of this utility model; Figure 2 This is a schematic diagram of the pressure sensor structure of this utility model; Figure 3 This is a schematic diagram of the lever pressure component structure of this utility model; Figure 4 This is a schematic diagram of the fastening component structure of this utility model.

[0015] In the diagram: 1. Metal casing; 2. Hydraulic cylinder; 3. Lever pressure assembly; 301. Limiting block; 302. Rubber block; 303. First connecting rod; 304. First hinge rod; 305. Hinge block; 306. Second hinge rod; 307. Connecting block; 4. Hydraulic connector; 5. Fastening assembly; 501. Semicircular sleeve; 502. Second connecting rod; 503. Connecting sleeve; 504. Connecting piece; 505. Second rotating block; 506. Rectangular limiting ring; 6. Hydraulic oil pipe; 7. Pressure gauge; 8. Pressure sensor; 9. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Please see Figures 1 to 4 This utility model provides a technical solution: a pilot-operated safety valve online calibration device, including a metal shell 1, a hydraulic cylinder 2 fixedly connected to the upper surface of the metal shell 1, a connecting pipe installed on one side of the hydraulic cylinder 2, a movable cavity provided inside the connecting pipe, a lever pressure component 3 provided on the inner wall of the movable cavity, and a hydraulic connector 4 fixedly connected to the other side of the hydraulic cylinder 2, with a fastening component 5 provided on the surface of the hydraulic connector 4. The lever pressure assembly 3 includes a limiting block 301 fixedly connected to the bottom wall of the movable cavity, a rubber block 302 movably connected to the top wall of the movable cavity, a connecting hole on the surface of the limiting block 301, a first connecting rod 303 movably passing through the inner wall of the connecting hole, a first hinge rod 304 hinged to one end of the first connecting rod 303, a hinge block 305 hinged to one end of the first hinge rod 304, a hinge groove on the surface of the hinge block 305, a second hinge rod 306 hinged to the inner wall of the hinge groove, a connecting block 307 hinged to one end of the second hinge rod 306, and a rubber block 302 fixedly connected to the upper surface of the hinge block 305. The fastening assembly 5 includes two semi-circular sleeves 501 that are fitted onto the surface of the hydraulic connector 4. The number of semi-circular sleeves 501 is two and they are arranged symmetrically. A second connecting rod 502 is fixedly connected to one side of each of the two semi-circular sleeves 501. A connecting sleeve 503 is movably fitted onto the surface of the second connecting rod 502. A connecting piece 504 is fixedly connected to the other side of the semi-circular sleeve 501. A first rotating block is fixedly connected to the other side of the other semi-circular sleeve 501. A second rotating block 505 is fixedly connected to one side of the connecting piece 504. A rectangular limiting ring 506 is rotatably connected at the center of the first rotating block and the second rotating block 505. A hydraulic connector 4 is fixedly connected to one side of the hydraulic cylinder 2. The hydraulic connector 4 is sealed and connected to the external hydraulic supply equipment to achieve stable transmission of pressure medium, and its outer circumferential surface is tightly fitted to the inner wall of the semi-circular sleeve 501. A hydraulic oil pipe 6 is fixedly sleeved on one side of the hydraulic connector 4. The hydraulic oil pipe 6 is made of rubber. Rubber is flexible and bendable, which can adapt to complex pipeline routes and is suitable for medium and high pressure conditions. A pressure gauge 7 is installed at one end of the connecting pipe. The pressure gauge 7 is connected to the internal moving cavity of the connecting pipe, which can monitor the pressure change in the cavity in real time and accurately feed back the value. A pressure sensor 8 is fixedly connected to the upper surface of the hydraulic cylinder 2. The pressure sensor 8 is in communication with the internal cavity of the hydraulic cylinder 2, and can collect the cylinder output pressure data in real time and transmit it to the external control terminal. The metal casing 1 has an internal movable groove, and a spring 9 is movably connected to the inner wall of the movable groove. The spring 9 is made of high carbon steel.

[0018] In this invention, the working steps of the device are as follows: First step: The worker first fixes the limiting block 301 to the bottom wall of the movable cavity of the connecting pipe, then moves the first connecting rod 303 through the connecting hole on the surface of the limiting block 301. Then, the two ends of the first hinge rod 304 are respectively hinged to one end of the first connecting rod 303 and the hinge block 305. Next, one end of the second hinge rod 306 is hinged in the hinge groove on the surface of the hinge block 305, and the other end is hinged to the connecting block 307. Finally, the rubber block 302 is movably connected to the top wall of the movable cavity and fixed to the upper surface of the connecting block 307. During operation, the pressure output by the hydraulic cylinder 2 drives the first connecting rod 303 to move. Through the linkage of the first hinge rod 304, the hinge block 305 and the second hinge rod 306, the small fluctuations of the hydraulic oil are amplified, which then drives the connecting block 307 to push the rubber block 302 to apply force smoothly. The limiting block 301 plays a limiting and guiding role for the first connecting rod 303 to ensure that the pressure transmission is uniform and stable. The second step: After the worker completes the installation, the worker needs to put the two symmetrically arranged semi-circular sleeves 501 onto the surface of the hydraulic connector 4 from both sides, so that the inner wall of the semi-circular sleeve 501 fits tightly against the outer circumference of the hydraulic connector 4. At this time, align the second connecting rods 502 on one side of the two semi-circular sleeves 501, and movably fit the connecting sleeve 503 onto the surface of the two second connecting rods 502 to achieve initial axial fixation. Then rotate the second rotating block 505 on one side of the connecting piece 504 to align it with the first rotating block on the other semi-circular sleeve 501. Put the rectangular limiting ring 506 on the center of the first rotating block and the second rotating block 505 to complete the linkage locking, and finally achieve a stable and sealed connection between the hydraulic connector 4 and the hydraulic oil pipe 6. The disassembly can be completed by reversing the operation.

[0019] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0020] It will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pilot-operated safety valve online calibration device, comprising a metal housing (1), characterized in that: A hydraulic cylinder (2) is fixedly connected to the upper surface of the metal shell (1). A connecting pipe is installed on one side of the hydraulic cylinder (2). A movable cavity is provided inside the connecting pipe. A lever pressure component (3) is provided on the inner wall of the movable cavity. A hydraulic connector (4) is fixedly connected to the other side of the hydraulic cylinder (2). A fastening component (5) is provided on the surface of the hydraulic connector (4). The lever pressure assembly (3) includes a limiting block (301) fixedly connected to the bottom wall of the movable cavity, a rubber block (302) movably connected to the top wall of the movable cavity, a connecting hole on the surface of the limiting block (301), a first connecting rod (303) movably passing through the inner wall of the connecting hole, a first hinge rod (304) hinged to one end of the first connecting rod (303), a hinge block (305) hinged to one end of the first hinge rod (304), a hinge groove on the surface of the hinge block (305), a second hinge rod (306) hinged to the inner wall of the hinge groove, a connecting block (307) hinged to one end of the second hinge rod (306), and a rubber block (302) fixedly connected to the upper surface of the hinge block (305). The fastening assembly (5) includes a semi-circular sleeve (501) fitted onto the surface of the hydraulic connector (4). There are two semi-circular sleeves (501) arranged symmetrically. A second connecting rod (502) is fixedly connected to one side of each of the two semi-circular sleeves (501). A connecting sleeve (503) is movably fitted onto the surface of the second connecting rod (502). A connecting piece (504) is fixedly connected to the other side of the semi-circular sleeve (501). A first rotating block is fixedly connected to the other side of the other semi-circular sleeve (501). A second rotating block (505) is fixedly connected to one side of the connecting piece (504). A rectangular limiting ring (506) is rotatably connected at the center of the first rotating block and the second rotating block (505).

2. The online calibration device for a pilot-operated safety valve according to claim 1, characterized in that: A hydraulic connector (4) is fixedly connected to one side of the hydraulic cylinder (2), and the hydraulic connector (4) is sealed and connected to the external hydraulic supply equipment to achieve stable transmission of pressure medium.

3. The online calibration device for a pilot-operated safety valve according to claim 2, characterized in that: A hydraulic hose (6) is fixedly sleeved on one side of the hydraulic connector (4), and the hydraulic hose (6) is made of rubber.

4. The online calibration device for a pilot-operated safety valve according to claim 1, characterized in that: A pressure gauge (7) is installed at one end of the connecting pipe, and the pressure gauge (7) is connected to the internal movable cavity of the connecting pipe.

5. The online calibration device for a pilot-operated safety valve according to claim 1, characterized in that: A pressure sensor (8) is fixedly connected to the upper surface of the hydraulic cylinder (2), and the pressure sensor (8) is in communication with the internal cavity of the hydraulic cylinder (2).

6. The online calibration device for a pilot-operated safety valve according to claim 1, characterized in that: The metal casing (1) has an open slot inside, and a spring (9) is movably connected to the inner wall of the slot.

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