An on-line calibration device for storage tank breather valves

Abstract

The present invention discloses an on-line calibration device for a storage tank breather valve, which relates to the technical field of calibration of storage tank breather valves. The on-line calibration device for the storage tank breather valve includes an explosion-proof box, inside which a processing computer display is fixedly connected, a processing computer operation area is fixedly connected at the bottom of the processing computer display inside the explosion-proof box, and an information processing module is fixedly connected at the bottom of the processing computer operation area inside the explosion-proof box. When the on-line calibration device for the storage tank breather valve performs negative pressure calibration on the breather valve, the negative pressure motor discharges the cooled gas passing through the negative pressure connecting pipe into the storage tank, so that the air pressure inside the storage tank drops sharply. And when performing positive pressure calibration, when the positive pressure motor discharges the heated gas passing through the positive pressure connecting pipe into the storage tank, the air pressure inside the storage tank rises sharply, accelerating the change speed of the gas-liquid inside the storage tank to increase the calibration speed.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection of storage tank breather valves, and particularly to an on-line inspection device for storage tank breather valves. Background Art

[0002] A breather valve is a key safety device mainly installed on storage tanks or containers, which can automatically sense internal pressure changes. When the internal pressure is too high, the breather valve will open to exhaust gas to avoid overpressure damage to the container; when the pressure is too low, it can inhale external gas to maintain the pressure balance inside the container.

[0003] The patent with the application number 202420018597.1 discloses an on-line inspection device for the breathing performance of a breather valve, including a gas source mechanism, a pressure regulating mechanism and a measuring mechanism. Among them: the gas source mechanism includes a high-pressure gas tank, and the outlet of the high-pressure gas tank is sequentially connected with a first valve, a pressure reducing valve and a second valve; the pressure regulating mechanism includes a pressure regulating box body, and a pressure regulating valve, a third valve, a vacuum generator, a low-pressure gas tank and a first gas path adapter are sequentially connected through a gas path pipeline in the pressure regulating box body; the measuring mechanism includes a measuring box body, and a PLC controller and a second gas path adapter, a flow meter and a second pressure transmitter are sequentially connected through a gas path pipeline in the measuring box body.

[0004] When the existing equipment inspects the breather valve of a storage tank with a large volume, when pressurizing and inspecting the inside of the storage tank, it often takes a long time to pressurize the gas inside the storage tank to make a more obvious change in the internal pressure of the storage tank, and when inspecting a large number of storage tanks, the inspection speed will be seriously slowed down. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an on-line inspection device for storage tank breather valves to solve the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: An on-line inspection device for storage tank breather valves includes an explosion-proof box, a processing computer display is fixedly connected inside the explosion-proof box, a processing computer operation area is fixedly connected at the bottom of the processing computer display inside the explosion-proof box, an information processing module is fixedly connected at the bottom of the processing computer operation area inside the explosion-proof box, a partition plate is fixedly connected on the right side of the information processing module inside the explosion-proof box, a pressure control mechanism is fixedly connected on the right side of the partition plate, and a gas source maintaining component is fixedly connected to the front of the pressure control mechanism.

[0007] The pressure control mechanism includes:

[0008] A positive pressure motor, which is fixedly connected inside the explosion-proof box;

[0009] A negative pressure motor, which is fixedly connected inside the explosion-proof box on the left side of the positive pressure motor;

[0010] A negative pressure calibration tube, which is fixedly connected to the back of the negative pressure motor;

[0011] A positive pressure calibration tube, which is fixedly connected to the back of the positive pressure motor.

[0012] Preferably, a sensor integration block is fixedly connected to the outer wall of the negative pressure calibration tube, and a sensor integration block is fixedly connected to the outer wall of the positive pressure calibration tube. A pressure sensor is integrated inside the sensor integration block. Quick-release joints are provided at the outer ends of the positive pressure calibration tube and the negative pressure calibration tube to facilitate connection to the breather valve calibration seat.

[0013] Preferably, a temperature control box is provided on the front of the explosion-proof box. A semiconductor refrigeration sheet is fixedly connected inside the temperature control box. A first heat conducting plate is fixedly connected to the right side of the semiconductor refrigeration sheet. A positive pressure connecting pipe is fixedly connected to the right side of the first heat conducting plate. A second heat conducting plate is fixedly connected to the left side of the semiconductor refrigeration sheet. A negative pressure connecting pipe is fixedly connected to the left side of the second heat conducting plate.

[0014] Preferably, the negative pressure connecting pipe is fixedly connected to the negative pressure motor, and the positive pressure connecting pipe is fixedly connected to the positive pressure motor.

[0015] Preferably, the gas source maintaining assembly includes a heat preservation box. A positive pressure gas connecting pipe is fixedly connected to the left side of the heat preservation box. A negative pressure gas connecting pipe is fixedly connected to the front of the positive pressure gas connecting pipe on the left side of the heat preservation box. The positive pressure gas connecting pipe is fixedly connected to the positive pressure connecting pipe, and the negative pressure gas connecting pipe is fixedly connected to the negative pressure connecting pipe.

[0016] Preferably, a heat insulation plate is movably connected between the positive pressure gas connecting pipe and the negative pressure gas connecting pipe of the heat preservation box. Two guiding plates are fixedly connected inside the heat preservation box. The heat insulation plate is movably connected to the two guiding plates. Two limiting blocks are fixedly connected to the outer walls of the two guiding plates.

[0017] Preferably, the limiting blocks limit the position of the heat insulation plate so that the heat insulation plate is always located between the positive pressure gas connecting pipe and the positive pressure gas connecting pipe.

[0018] Preferably, an electromagnetic ventilation valve is fixedly connected inside the heat insulation plate. Springs are fixedly connected to the front and back sides of the heat insulation plate, and the springs are fixedly connected to the inner wall of the heat preservation box. An air vent is provided on the back of the heat preservation box. A sealing cover is movably connected to the outer wall of the air vent by threads.

[0019] The present invention provides an on-line calibration device for a storage tank breather valve. It has the following beneficial effects:

[0020] 1. The online calibration device for the storage tank breathing valve, when performing negative pressure calibration on the breathing valve, the negative pressure motor discharges the gas cooled by the negative pressure connecting pipe into the storage tank, causing the air pressure inside the storage tank to drop sharply; and when performing positive pressure calibration, the positive pressure motor discharges the gas heated by the positive pressure connecting pipe into the storage tank, causing the air pressure inside the storage tank to rise sharply, thereby accelerating the change speed of the gas and liquid inside the storage tank, thereby increasing the calibration speed.

[0021] 2. When the online calibration device of the storage tank breathing valve performs positive pressure calibration on the breathing valve, the positive pressure motor will heat the hot air inside the insulation box again through the positive pressure connecting pipe, so that the temperature of the gas changes higher, thereby making the gas temperature inside the storage tank higher, which will further increase the speed of the internal air pressure rise of the storage tank during the positive pressure calibration, thereby increasing the calibration speed.

[0022] 3. The online calibration device for the tank breathing valve, when the next breathing valve is subjected to negative pressure calibration, the negative pressure motor will discharge the cooled cold air into the tank. The cold air will be cooled again through the negative pressure connecting pipe, making the temperature of the gas discharged into the tank lower, further reducing the temperature inside the tank, and further increasing the speed of reducing the air pressure inside the tank during the negative pressure calibration, thereby increasing the calibration speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention;

[0025] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 4 This is a schematic diagram of the information processing module structure of the present invention;

[0027] Figure 5 for Figure 4 The enlarged structural diagram of the middle B part;

[0028] Figure 6 for Figure 4 The enlarged structural diagram of the middle C part;

[0029] Figure 7 It is a schematic diagram of the structure of the thermal insulation board of the present invention;

[0030] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part D in the middle.

[0031] In the figure: 1. Explosion-proof box; 2. Processing computer monitor; 3. Processing computer operation area; 4. Information processing module; 5. Pressure control mechanism; 501. Positive pressure motor; 502. Negative pressure motor; 503. Negative pressure calibration tube; 504. Positive pressure calibration tube; 505. Sensor integration block; 506. Temperature control box; 507. Positive pressure connecting pipe; 508. Negative pressure connecting pipe; 509. First heat conducting plate; 510. Second heat conducting plate; 511. Semiconductor refrigeration chip; 6. Gas source maintaining component; 601. Heat preservation box; 602. Positive pressure gas connecting pipe; 603. Negative pressure gas connecting pipe; 604. Heat insulation plate; 605. Electromagnetic ventilation valve; 606. Spring; 607. Guide plate; 608. Limit block; 609. Ventilation port. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0033] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0034] Embodiment 1: Please refer to Figures 1-6 , the present invention provides a technical solution: An on-line calibration device for a storage tank breathing valve, including an explosion-proof box 1, a processing computer monitor 2 fixedly connected inside the explosion-proof box 1, a processing computer operation area 3 fixedly connected at the bottom of the processing computer monitor 2 inside the explosion-proof box 1, an information processing module 4 fixedly connected at the bottom of the processing computer operation area 3 inside the explosion-proof box 1, a partition plate fixedly connected on the right side of the information processing module 4 inside the explosion-proof box 1, a pressure control mechanism 5 fixedly connected on the right side of the partition plate, and a gas source maintaining component 6 fixedly connected to the front of the pressure control mechanism 5;

[0035] The pressure control mechanism 5 includes:

[0036] A positive pressure motor 501, the positive pressure motor 501 is fixedly connected inside the explosion-proof box 1, and has a self-locking function when the positive pressure motor 501 is not working, and can block the passage;

[0037] A negative pressure motor 502, the negative pressure motor 502 is fixedly connected inside the explosion-proof box 1 on the left side of the positive pressure motor 501, and has a self-locking function when the negative pressure motor 502 is not working, and can block the passage;

[0038] A negative pressure calibration tube 503, the negative pressure calibration tube 503 is fixedly connected to the back of the negative pressure motor 502;

[0039] The positive pressure calibration tube 504 is fixedly connected to the back of the positive pressure motor 501.

[0040] A sensor integration block 505 is fixedly connected to the outer wall of the negative pressure calibration tube 503, and a sensor integration block 505 is fixedly connected to the outer wall of the positive pressure calibration tube 504. A pressure sensor is integrated inside the sensor integration block 505. The two pressure sensors will display the calibrated pressure on the processing computer monitor 2. Quick-release joints are provided at the outer ends of the positive pressure calibration tube 504 and the negative pressure calibration tube 503 to facilitate connection to the breather valve calibration seat. When the negative pressure calibration tube 503 and the positive pressure calibration tube 504 are connected to the breather valve calibration seat, the pressure sensed by the pressure sensor is the internal air pressure of the storage tank.

[0041] Connect to the breather valve calibration seat through the quick-release joints on the negative pressure calibration tube 503 and the positive pressure calibration tube 504, and operate through the processing computer operation area 3 to perform negative pressure calibration. Let the positive pressure motor 501 quickly inhale gas from the storage tank through the positive pressure calibration tube 504, and let the negative pressure motor 502 slowly discharge gas into the storage tank through the negative pressure calibration tube 503.

[0042] A temperature control box 506 is provided on the front of the explosion-proof box 1. A semiconductor refrigeration sheet 511 is fixedly connected inside the temperature control box 506. When the semiconductor refrigeration sheet 511 is started, the left side is the refrigerating surface and the right side is the heating surface. A first heat conduction plate 509 is fixedly connected to the right side of the semiconductor refrigeration sheet 511, and a positive pressure connecting pipe 507 is fixedly connected to the right side of the first heat conduction plate 509. The second heat conduction plate 510 will be cooled by the semiconductor refrigeration sheet 511, and the semiconductor refrigeration sheet 511 will cool the gas flowing through the negative pressure connecting pipe 508 through the negative pressure connecting pipe 508. A second heat conduction plate 510 is fixedly connected to the left side of the semiconductor refrigeration sheet 511, and a negative pressure connecting pipe 508 is fixedly connected to the left side of the second heat conduction plate 510. The first heat conduction plate 509 will be heated by the semiconductor refrigeration sheet 511, and the first heat conduction plate 509 will heat the gas flowing through the inside of the positive pressure connecting pipe 507 through the positive pressure connecting pipe 507.

[0043] The negative pressure connecting pipe 508 is fixedly connected to the negative pressure motor 502, and the positive pressure connecting pipe 507 is fixedly connected to the positive pressure motor 501.

[0044] When performing the verification, the semiconductor refrigeration sheet 511 is started synchronously. The positive pressure motor 501 will cause the gas in the storage tank to be inhaled into the positive pressure connection pipe 507 through the positive pressure verification pipe 504. Then, the negative pressure motor 502 will cause the gas passing through the negative pressure connection pipe 508 to be discharged from the negative pressure verification pipe 503 into the storage tank interior. The positive pressure motor 501 will inhale the gas relatively quickly, and the negative pressure motor 502 will discharge the gas relatively slowly, which will cause the gas in the storage tank interior to decrease, thereby causing the air pressure in the storage tank interior to decrease. At the same time, when the gas discharged by the negative pressure motor 502 into the storage tank interior passes through the negative pressure connection pipe 508, it will be cooled by the second heat conducting plate 510 and become relatively cold gas, which is discharged into the storage tank interior through the negative pressure verification pipe 503. This will reduce the temperature of the gas in the storage tank interior, thereby causing the gas in the storage tank interior to contract, and further causing the air pressure in the storage tank interior to decrease sharply. Observe the change in air pressure displayed on the processing computer monitor 2. When the air pressure on the processing computer monitor 2 decreases to a certain value and no longer changes, then this value is the negative pressure value at which the breather valve opens.

[0045] After the negative pressure verification is completed, the positive pressure verification is carried out. At this time, the negative pressure motor 502 slowly sucks out the gas in the storage tank through the negative pressure verification pipe 503. At the same time, the positive pressure motor 501 quickly discharges the gas into the storage tank interior through the positive pressure verification pipe 504. The discharging speed of the positive pressure motor 501 is faster than the sucking speed of the negative pressure motor 502, which will cause the air pressure in the storage tank interior to gradually increase. At the same time, the gas discharged by the positive pressure motor 501 will be heated by the first heat conducting plate 509 through the positive pressure connection pipe 507. When the hot gas is discharged into the storage tank interior, it will cause the gas in the storage tank interior to expand, thereby more quickly causing the air pressure in the storage tank interior to rise sharply. Observe the change in air pressure displayed on the processing computer monitor 2. When the air pressure on the processing computer monitor 2 rises to a certain value and no longer changes, then this value is the positive pressure value at which the breather valve opens.

[0046] Embodiment 2: Please refer to Figures 1-8 , on the basis of Embodiment 1, the present invention provides a technical solution:

[0047] The gas source holding assembly 6 includes a heat preservation box 601. A positive pressure gas connection pipe 602 is fixedly connected to the left side of the heat preservation box 601. A negative pressure gas connection pipe 603 is fixedly connected to the front of the left side of the heat preservation box 601, and the positive pressure gas connection pipe 602 is fixedly connected to the positive pressure connection pipe 507, and the negative pressure gas connection pipe 603 is fixedly connected to the negative pressure connection pipe 508.

[0048] An insulating plate 604 is movably connected between the positive pressure gas connection pipe 602 and the negative pressure gas connection pipe 603 of the heat preservation box 601. Two guide plates 607 are fixedly connected inside the heat preservation box 601, and the insulating plate 604 is movably connected to the two guide plates 607. Two limiting blocks 608 are fixedly connected to the outer walls of the two guide plates 607.

[0049] When performing negative pressure calibration, the gas discharged from the inside of the storage tank by the positive pressure motor 501 through the positive pressure calibration pipe 504 will pass through the positive pressure connecting pipe 507 and be stored on the back side of the heat insulation board 604 inside the heat preservation box 601. This gas will be heated to hot gas by the positive pressure connecting pipe 507 after passing through the positive pressure connecting pipe 507 once. Then, when performing positive pressure calibration again, the positive pressure motor 501 will discharge these hot gases into the storage tank through the positive pressure calibration pipe 504. These gases will pass through the positive pressure connecting pipe 507 again, causing the gases to be heated again, resulting in a higher temperature change of the gases, which will make the temperature of the gases inside the storage tank higher, and further increase the rising speed of the air pressure inside the storage tank during positive pressure calibration.

[0050] After completing the calibration of the breather valve on one storage tank, immediately calibrate the breather valve of the next storage tank. Since during the positive pressure calibration of the previous breather valve, the gas inhaled by the negative pressure motor 502 from the storage tank is discharged through the negative pressure connecting pipe 508 to the front side of the heat insulation board 604 inside the heat preservation box 601. When performing the calibration of the next breather valve, the negative pressure motor 502 will discharge these cold gases into the storage tank. The cold gases will be cooled again after passing through the positive pressure connecting pipe 507, making the temperature of the gases discharged into the storage tank lower, further reducing the temperature inside the storage tank, and further increasing the decreasing speed of the air pressure inside the storage tank during negative pressure calibration.

[0051] The limiting block 608 will limit the position of the heat insulation board 604, keeping the heat insulation board 604 always between the positive pressure gas connecting pipe 602 and the positive pressure gas connecting pipe 602.

[0052] Prevent the gases on the front and back sides of the heat insulation board 604 inside the heat preservation box 601 from contacting and affecting each other through the positive pressure gas connecting pipe 602 or the heat insulation board 604.

[0053] An electromagnetic ventilation valve 605 is fixedly connected inside the heat insulation board 604. Springs 606 are fixedly connected to both the front and back sides of the heat insulation board 604, and the springs 606 are fixedly connected to the inner wall of the heat preservation box 601. When the electromagnetic ventilation valve 605 is opened, the front and back sides of the heat insulation board 604 will be connected. The heat insulation board 604 will be located in the middle of the heat preservation box 601 under the action of the two springs 606 to evenly distribute the gases inside the heat preservation box 601. A ventilation port 609 is provided on the back of the heat preservation box 601, and the outer wall of the ventilation port 609 is movably connected with a sealing cover by threads.

[0054] Before calibrating the storage tank, open the electromagnetic vent valve 605 to connect the front and back sides of the heat insulation board 604 through the electromagnetic vent valve 605, and open the sealing cover on the vent 609 to fill the inside of the heat preservation box 601 with gas that is compatible with the inside of the storage tank. Then seal the vent 609 with the sealing cover. After completing the calibration, the front and back sides of the heat insulation board 604 can be made to communicate by opening the electromagnetic vent valve 605 to promote the uniform distribution of the gas.

[0055] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An online calibration device for a tank breathing valve, comprising an explosion-proof box, characterized in that: A processing computer display is fixedly connected inside the explosion-proof box, a processing computer operation area is fixedly connected at the bottom of the processing computer display inside the explosion-proof box, an information processing module is fixedly connected at the bottom of the processing computer operation area inside the explosion-proof box, a partition plate is fixedly connected at the right side of the information processing module inside the explosion-proof box, a pressure control mechanism is fixedly connected to the right side of the partition plate, and an air source holding component is fixedly connected to the front of the pressure control mechanism; Pressure control mechanisms include: A positive pressure motor, wherein the positive pressure motor is fixedly connected inside the explosion-proof box; A negative pressure motor, which is fixedly connected inside the explosion-proof box and is located on the left side of the positive pressure motor; A negative pressure calibration tube, which is fixedly connected to the back of the negative pressure motor; A positive pressure calibration tube, which is fixedly connected to the back of the positive pressure motor; A temperature control box is arranged on the front of the explosion-proof box, a semiconductor refrigeration sheet is fixedly connected inside the temperature control box, a first heat conducting plate is fixedly connected to the right side of the semiconductor refrigeration sheet, a positive pressure connecting pipe is fixedly connected to the right side of the first heat conducting plate, a second heat conducting plate is fixedly connected to the left side of the semiconductor refrigeration sheet, and a negative pressure connecting pipe is fixedly connected to the left side of the second heat conducting plate; The gas source holding component includes an insulation box, a positive pressure air pipe is fixedly connected to the left side of the insulation box, a negative pressure air pipe is fixedly connected to the left side of the insulation box in front of the positive pressure air pipe, and the positive pressure air pipe is fixedly connected to the positive pressure connecting pipe, and the negative pressure air pipe is fixedly connected to the negative pressure connecting pipe; The insulation box is located between the positive pressure air pipe and the negative pressure air pipe and is movably connected with an insulation plate. Two guide plates are fixedly connected inside the insulation box, and the insulation plate is movably connected to the two guide plates. The outer walls of the two guide plates are fixedly connected with two limiting blocks.

2. The on-line calibration device for a tank breathing valve according to claim 1 is characterized in that: The outer wall of the negative pressure calibration tube is fixedly connected to a sensor integrated block, and the outer wall of the positive pressure calibration tube is fixedly connected to a sensor integrated block. A pressure sensor is integrated inside the sensor integrated block. The outer ends of the positive pressure calibration tube and the negative pressure calibration tube are provided with quick-release connectors to facilitate connection with the breathing valve calibration seat.

3. The online calibration device for a tank breathing valve according to claim 1 is characterized in that: The negative pressure connecting pipe is fixedly connected to the negative pressure motor, and the positive pressure connecting pipe is fixedly connected to the positive pressure motor.

4. The on-line calibration device for a tank breathing valve according to claim 1 is characterized in that: The limiting block can limit the position of the heat insulating plate, so that the heat insulating plate is always located between the positive pressure connecting air pipes.

5. The on-line calibration device for a tank breathing valve according to claim 4 is characterized in that: An electromagnetic ventilation valve is fixedly connected inside the insulation board, springs are fixedly connected to the front and rear sides of the insulation board, and the springs are fixedly connected to the inner wall of the insulation box. A vent is provided at the back of the insulation box, and a sealing cover is movably connected to the outer wall of the vent through a thread.

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