Bidirectional sealing inspection device for breather valve, in-situ inspection method of bidirectional sealing inspection device and tank assembly

Abstract

The invention belongs to the technical field of storage tank safety and provides a two-way sealing inspection device for a breather valve, an in-situ inspection method of the two-way sealing inspection device and a tank body assembly.The device comprises a connecting valve bin, a sealing assembly and a gas injection pipeline, the two opposite ends of the connecting valve bin are each provided with a connector, and the bin wall of the connecting valve bin is further provided with an inspection channel; the inspection channel is opened and closed through a pressing door, the sealing assembly is installed in the connecting valve bin and comprises an upper sealing plate used for blocking a connector at one end of the connecting valve bin and a jacking part used for providing blocking pressing force for the upper sealing plate, one end of the gas injection pipeline is located in the connecting valve bin, and the other end of the gas injection pipeline penetrates through the upper sealing plate. According to the device, the breather valve can be simply and rapidly isolated from the external environment, the breather valve does not need to be disassembled in the inspection process, and the situation that holes are formed in the connecting valve bin can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of storage tank safety technology, specifically relating to a bidirectional sealing inspection device for a breather valve and its in-situ inspection method, as well as a tank assembly. Background Technology

[0002] The breather valve on the storage tank can automatically balance the pressure between the tank and the outside environment when the tank is pressurized or under negative pressure. However, the performance of the breather valve gradually decreases over time and with changes in operating conditions, leading to increased VOCs leakage and failure to meet environmental protection requirements. Therefore, regular inspection of the breather valve is necessary. GB / T 37327-2019 "Integrity Management of Atmospheric Pressure Storage Tanks" stipulates that the breather valve should be inspected at least once a year, and the inspection should include visual inspection, opening pressure, and leakage test.

[0003] Currently, existing breather valves are directly installed on the storage tank. When the breather valve needs to be inspected, it must be removed from the tank and installed on an inspection table to conduct tests on its opening pressure and leakage. This inspection method involves the disassembly, hoisting, and transportation of the breather valve, resulting in high maintenance costs and a high risk of damaging the valve's sealing components, thus reducing its sealing performance. Summary of the Invention

[0004] To address the aforementioned defects or deficiencies, this invention provides a bidirectional sealing inspection device for breather valves, its in-situ inspection method, and a tank assembly, aiming to solve the technical problem that existing breather valves require disassembly for performance testing.

[0005] To achieve the above objectives, the present invention provides a bidirectional sealing inspection device for a breathing valve, wherein the bidirectional sealing inspection device for a breathing valve includes a connecting valve chamber, a sealing component, and an air injection pipe. The connecting valve chamber has interfaces at opposite ends, and an inspection channel is provided on the chamber wall of the connecting valve chamber. The inspection channel is opened and closed by a pressure-closing door. The sealing component is installed in the connecting valve chamber and includes an upper sealing plate for sealing one end of the interface of the connecting valve chamber and a lifting member for providing sealing and clamping force to the upper sealing plate. One end of the air injection pipe is located in the connecting valve chamber, and the other end passes through the upper sealing plate.

[0006] In an embodiment of the present invention, a valve body docking seat is provided at one end of the valve chamber, and a valve body interface is provided on the valve body docking seat. The upper sealing plate is sealed against the inner side of the valve body docking seat and the valve body interface is closed.

[0007] In an embodiment of the present invention, the inner side of the valve body docking seat is provided with a first sinking groove that sinks outward, the valve body interface is opened on the bottom wall of the first sinking groove, and the upper sealing plate extends into the first sinking groove and seals against the bottom wall of the first sinking groove.

[0008] In an embodiment of the present invention, the valve body docking seat is further provided with an upper positioning block, which is used to support and position the peripheral wall of the upper sealing plate when the upper sealing plate extends into the first sinking groove.

[0009] In an embodiment of the present invention, there are multiple upper positioning blocks, which are arranged sequentially at intervals along the edge of the first sinking groove.

[0010] In an embodiment of the present invention, the upper sealing plate includes a plate body and a flexible sealing diaphragm attached to the outside of the plate body. The flexible sealing diaphragm is disposed facing the valve body docking seat and is used to seal against the valve body docking seat.

[0011] In embodiments of the present invention, the flexible sealing diaphragm is preferably made of nitrile rubber.

[0012] In embodiments of the present invention, the thickness of the flexible sealing diaphragm is preferably 1.5 to 2.5 mm.

[0013] In an embodiment of the present invention, the flexible sealing diaphragm is bonded to the plate body using a cyanoacrylate material.

[0014] In an embodiment of the present invention, a main body docking seat is provided at the opposite end of the connecting valve chamber, and a main body interface is provided on the main body docking seat. The sealing assembly also includes a lower sealing plate provided at the end of the lifting member away from the upper sealing plate. The lower sealing plate seals against the inner side of the main body docking seat and closes the main body interface.

[0015] In an embodiment of the present invention, a second recessed groove is provided on the inner side of the main body docking seat, a lower positioning block is provided on the edge of the second recessed groove, the valve body interface is opened on the bottom wall of the second recessed groove, the lower sealing plate extends into the second recessed groove and abuts against the bottom wall of the second recessed groove, and the lower positioning block is used to abut and position the peripheral wall of the lower sealing plate.

[0016] In an embodiment of the present invention, a handle is also provided on the lower sealing plate.

[0017] In an embodiment of the present invention, the lifting component is a cylinder, the cylinder body is fixedly mounted on the lower sealing plate, and the cylinder rod is movably hinged to the upper sealing plate.

[0018] In an embodiment of the present invention, the diameter of the gas injection pipe is 5mm to 40mm.

[0019] In an embodiment of the present invention, the bidirectional sealing test device for the breather valve further includes an air supply mechanism for supplying air to the lifting component, wherein the output pressure of the air supply mechanism is 0.2 MPa to 0.4 MPa.

[0020] To achieve the above objectives, the present invention also provides a tank assembly, wherein the tank assembly includes a tank body, a bidirectional sealing inspection device for a breather valve as described above, and a breather valve, wherein a connecting valve chamber in the sealing inspection device is installed on the tank body and one end of the connecting valve chamber is connected to the breather port of the tank body, and the breather valve is installed on the connecting valve chamber and the valve port of the breather valve is connected to the other end of the connecting valve chamber.

[0021] To achieve the above objectives, the present invention also provides a method for in-situ testing of a breathing valve, the method comprising:

[0022] S100: Provides a tank assembly as described above;

[0023] S200: Controls the lifting component to lift, thereby driving the upper sealing plate to move toward the valve port of the breather valve and applying a preset lifting pressure to the upper sealing plate;

[0024] S300: Inject gas into the gas injection line to test the breather valve.

[0025] In an embodiment of the present invention, the inspection of the breathing valve includes inspecting the positive pressure opening pressure of the breathing valve and injecting gas into the gas injection pipeline to inspect the breathing valve. The specific steps include:

[0026] S301: Inject positive pressure gas into the gas injection pipeline, adjust the initial pressure of the positive pressure gas until the positive pressure breathing start plate of the breathing valve is fully opened;

[0027] S302: After confirming that the positive pressure breathing start plate of the breathing valve is fully open, gradually reduce the pressure of the positive pressure gas;

[0028] S303: When the positive pressure breathing starter plate returns to its seat and vibrates, and the leakage flow rate of the positive pressure gas being tested satisfies Q(t+1)-Q(t)≤ preset value, record the current pressure of the positive pressure gas;

[0029] Record the current pressure of the positive pressure gas as the positive pressure opening pressure of the breather valve.

[0030] In an embodiment of the present invention, the inspection of the breathing valve includes inspecting the negative pressure opening pressure of the breathing valve and injecting gas into the gas injection pipeline to inspect the breathing valve. The specific steps include:

[0031] S311: Inject negative pressure gas into the gas injection pipeline and adjust the initial pressure of the negative pressure gas until the negative pressure breathing start plate of the breathing valve is fully opened;

[0032] S312: After confirming that the negative pressure breathing start plate of the breathing valve is fully open, gradually increase the pressure of the negative pressure gas;

[0033] S313: When the negative pressure breathing starter plate returns to its seat and vibrates, and the leakage flow rate of the tested negative pressure gas satisfies Q(t+1)-Q(t)≤ preset value, record the current pressure of the negative pressure gas;

[0034] Record the current pressure of the negative pressure gas as the negative pressure opening pressure of the breather valve.

[0035] In an embodiment of the present invention, inspecting the breather valve includes inspecting the positive pressure leakage rate of the breather valve, and the specific steps of injecting gas into the gas injection pipeline to inspect the breather valve include:

[0036] S321: Inject positive pressure gas into the gas injection pipeline and adjust the initial pressure of the positive pressure gas to be the same as the positive pressure opening pressure of the breather valve;

[0037] S322: Gradually reduce the pressure of the positive pressure gas until the current pressure of the positive pressure gas is 0.75 times the initial pressure of the positive pressure gas;

[0038] S323: Collects the flow rate of positive pressure gas after it has stabilized at 0.75 times the initial pressure.

[0039] In an embodiment of the present invention, the inspection of the breathing valve includes inspecting the negative pressure leakage rate of the breathing valve, and the specific steps of injecting gas into the gas injection pipeline to inspect the breathing valve include:

[0040] S331: Inject negative pressure gas into the gas injection pipeline and adjust the initial pressure of the negative pressure gas to be the same as the negative pressure opening pressure of the breather valve;

[0041] S332: Gradually increase the pressure of the negative pressure gas until the current pressure of the negative pressure gas is 0.75 times the initial pressure of the negative pressure gas;

[0042] S333: Collects the flow rate of negative pressure gas after it stabilizes at 0.75 times the initial pressure.

[0043] Through the above technical solution, the bidirectional sealing inspection device for breather valves provided in this embodiment of the invention has the following beneficial effects:

[0044] The connecting valve compartment is installed between the breather valve and the storage tank. When the breather valve is in normal use, the pressure-closing valve remains closed, and the two ends of the connecting valve compartment ensure communication between the breather valve and the storage tank. When the breather valve needs to be inspected, the inspection channel can be opened first, and then the sealing assembly can be installed inside the connecting valve compartment through the inspection channel. After the sealing assembly is in place, the upper sealing plate can be pushed up by the lifting component to seal the valve port of the breather valve, thereby isolating the valve chamber of the breather valve from the outside environment and providing the necessary environment for the breather valve inspection. When the breather valve is isolated, simply inject test gas into the injection pipeline to achieve in-situ testing of the breather valve's opening pressure and leakage. In summary, the bidirectional sealing inspection device for breather valves in this invention can easily and quickly isolate the breather valve from the external environment, providing the necessary environment for breather valve inspection. Simultaneously, the inspection process does not require disassembly of the breather valve, effectively reducing inspection costs. Furthermore, by applying sealing and clamping force through the lifting component, the isolation effect of the breather valve can be guaranteed, ensuring no gas leakage during the inspection process and guaranteeing the accuracy of the inspection results. In addition, placing the gas injection pipe on the upper sealing plate avoids the need for opening holes in the connecting valve chamber, ensuring the sealing performance and structural strength of the connecting valve chamber during daily use.

[0045] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0046] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 This is a schematic diagram of the overall structure of the bidirectional sealing test device for a breather valve according to an embodiment of the present invention.

[0048] Figure 2 This is a cross-sectional structural schematic diagram of a bidirectional sealing inspection device for a breather valve according to an embodiment of the present invention.

[0049] Figure 3 This is a schematic diagram of the sealing assembly according to an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the specific structure of the upper sealing plate according to an embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of the connection between the tank assembly and the gas supply system according to an embodiment of the present invention.

[0052] Figure 6 This is a flowchart of the in-situ inspection method for the breathing valve according to an embodiment of the present invention;

[0053] Figure 7 This is a first detailed step diagram of step S300 according to an embodiment of the present invention;

[0054] Figure 8 This is a second detailed step diagram of step S300 according to an embodiment of the present invention;

[0055] Figure 9 This is a diagram illustrating the third specific step of step S300 according to an embodiment of the present invention;

[0056] Figure 10 This is a diagram illustrating the fourth specific step of step S300 according to an embodiment of the present invention;

[0057] Explanation of reference numerals in the attached figures

[0058] 1. Connecting valve compartment 11. Valve body docking seat

[0059] 111 First boss 12 Main body docking seat

[0060] 121 Second protrusion 13 Inspection channel

[0061] 14. Pressure-closing door 15. Door sealing structure

[0062] 16 Alignment and locking structure 17 Upper positioning block

[0063] 18 Lower positioning block 2 sealing assembly

[0064] 21 Top sealing plate 211 Plate body

[0065] 212 Flexible sealing diaphragm 213 Diaphragm holder

[0066] 214 Diaphragm positioning rod 22 Lifting component

[0067] 23 Bottom sealing plate 24 Handle

[0068] 3. Gas injection pipeline 4. Storage tank body

[0069] 5. Breathing valve 6. Air supply system

[0070] 61 Gas source 62 Inspection pipe main line

[0071] 621 Positive pressure test branch; 622 Negative pressure test branch

[0072] 623 Pipeline selector valve; 624 Negative pressure generator

[0073] 625 Flow measurement element; 626 Pressure measurement element

[0074] 627 Pressure regulating valve; 63 Main gas supply line Detailed Implementation

[0075] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0076] The bidirectional sealing inspection device for a breather valve of the present invention is described below with reference to the accompanying drawings.

[0077] Example 1:

[0078] This invention provides a bidirectional sealing inspection device for breather valves, such as... Figure 1 , Figure 2 and Figure 3 As shown, the bidirectional seal testing device for the breather valve includes:

[0079] The connecting valve chamber 1 has interfaces at opposite ends (such as the upper and lower ends). The interfaces at both ends of the connecting valve chamber 1 are used to connect with the valve port of the breather valve and the air outlet of the main body of the storage tank 4, respectively. The connecting valve chamber 1 also has an inspection channel 13 on its wall. The inspection channel 13 is opened and closed by a pressure-closing door 14.

[0080] Sealing assembly 2, which passes through inspection channel 13 and is used for installation within connecting valve chamber 1, includes an upper sealing plate 21 and a lifting member 22. The upper sealing plate 21 is used to seal the interface on connecting valve chamber 1 that connects to the valve port of the breather valve, and the lifting member 22 is used to provide sealing pressure to the upper sealing plate 21; and

[0081] The air injection pipe 3 is installed on the upper sealing plate 21, with one end extending into the connecting valve chamber 1 and the other end passing through the upper sealing plate 21.

[0082] The connecting valve chamber 1 is installed between the breather valve and the storage tank. When the breather valve is in normal use, the pressure-closing valve 14 remains closed, ensuring communication between the breather valve and the storage tank through the two end interfaces of the connecting valve chamber 1. When the breather valve needs to be inspected, the inspection channel 13 can be opened first, and then the sealing assembly 2 can be installed inside the connecting valve chamber 1 through the inspection channel 13. After the sealing assembly 2 is installed in place, the sealing plate 21 is pushed up by the lifting member 22 to seal the valve port of the breather valve, thereby isolating the valve chamber of the breather valve from the outside world and providing the necessary environment for the inspection of the breather valve. After the breather valve is isolated, test gas can be injected into the gas injection pipe 3 to pre-test the opening pressure and leakage of the breather valve. In summary, the bidirectional sealing inspection device for breathing valves in this invention can easily and quickly isolate the breathing valve from the external environment, providing the necessary environment for the inspection of the breathing valve; at the same time, the inspection process does not require the removal of the breathing valve, effectively reducing inspection costs; furthermore, by applying sealing and clamping force through the lifting component 22, the isolation effect of the breathing valve can be guaranteed, ensuring no gas leakage during the inspection process and guaranteeing the accuracy of the inspection results; finally, by setting the gas injection pipe 3 on the upper sealing plate 21, it is possible to avoid opening holes in the connecting valve chamber 1, ensuring the sealing performance and structural strength of the connecting valve chamber 1 during daily use.

[0083] like Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of the present invention, one end of the connecting valve chamber 1 is provided with a valve body docking seat 11, and the valve body docking seat 11 is provided with a valve body interface. The upper sealing plate 21 is sealed and abuts against the inner side of the valve body docking seat 11 and seals the valve body interface. The valve body docking seat 11 is used to dock with the valve port of the breather valve. The valve body docking seat 11 can be a flange seat, and the valve body interface can be the flange port on the valve body docking seat 11. By setting the valve body docking seat 11, the upper sealing plate 21 can be held and limited when the lifting member 22 pushes it. The pushing of the lifting member 22 can ensure the clamping force between the upper sealing plate 21 and the valve body mounting seat, and ensure the sealing effect of the upper sealing plate 21 on the valve body interface.

[0084] like Figure 1 , Figure 2 and Figure 3 As shown, in an embodiment of the present invention, the inner side of the valve body docking seat 11 is provided with a first recessed groove that sinks outward. The valve body interface is opened on the bottom wall of the first recessed groove, and the remaining part of the bottom wall forms a first boss 111. The upper sealing plate 21 extends into the first recessed groove and seals against the abutment boss. By setting the first recessed groove, the upper sealing plate 21 can be limited, preventing the upper sealing plate 21 from sliding freely when the lifting member 22 pushes the upper sealing plate 21. At the same time, by setting the recessed groove, the installation of the upper sealing plate 21 is convenient.

[0085] like Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of the present invention, the valve body docking seat 11 is further provided with an upper positioning block 17, which is used to support and position the peripheral wall of the upper sealing plate 21 when the upper sealing plate 21 is inserted into the first sinking groove. By providing the upper positioning block 17, the relative position between the upper sealing plate 21 and the valve body interface can be further ensured.

[0086] In an embodiment of the present invention, there are multiple upper positioning blocks 17, which are arranged sequentially at intervals along the edge of the first sinking groove. For example, there may be four upper positioning blocks 17, and the phase angle between adjacent upper positioning blocks 17 may be 90°.

[0087] In an embodiment of the present invention, the size of the annular ring formed by the upper positioning block 17 is preferably slightly larger than the diameter of the upper sealing plate 21, such as a difference of 2 mm. The thickness of the upper positioning block 17 is preferably greater than the thickness of the upper sealing plate 21, and the difference between the two can be 8-12 mm, preferably 10 mm.

[0088] In embodiments of the present invention, the lower positioning block 18 can be configured in the same way as the upper positioning block 17, and will not be described again here.

[0089] In an embodiment of the present invention, installing the sealing assembly 2 into place includes installing the upper sealing plate 21 in the first sinking groove and limiting and resisting it with the upper positioning block 17.

[0090] like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the upper sealing plate 21 includes a plate body 211 and a flexible sealing diaphragm 212 attached to the outside of the plate body 211. The flexible sealing diaphragm 212 is disposed facing the valve body docking seat 11 and is used to seal against the valve body docking seat 11. By providing the flexible sealing diaphragm 212, the sealing performance of the upper sealing plate 21 can be further guaranteed.

[0091] In an embodiment of the present invention, the flexible sealing diaphragm 212 can be made of nitrile rubber, and the electrostatic conductivity of the nitrile rubber flexible sealing diaphragm 212 is less than 10. 6 Ω, with excellent antistatic properties. The thickness of the flexible sealing diaphragm 212 can be 1.5 to 2.5 mm, preferably 2 mm. The flexible sealing diaphragm 212 can be bonded to the plate body 211, and the adhesive is preferably cyanoacrylate material.

[0092] like Figure 4As shown, in an embodiment of the present invention, the flexible sealing diaphragm 212 can cooperate with the diaphragm positioning rod 214 on the plate body 211 through the diaphragm holder 213. The diaphragm positioning rod 214 is used to ensure the coaxiality and relative position between the flexible sealing diaphragm 212 and the plate body 211. The diaphragm holder 213 can be fastened to the diaphragm positioning rod 214 through a threaded connector.

[0093] like Figure 1 and Figure 2 As shown in the embodiment of the present invention, a main body docking seat 12 is provided at the opposite end of the valve chamber 1. The main body docking seat 12 is provided with a main body interface. The sealing assembly 2 also includes a lower sealing plate 23 disposed at the end of the lifting member 22 away from the upper sealing plate 21. The lower sealing plate 23 is sealed against the inner side of the main body docking seat 12 and closes the main body interface. The main body docking seat 12 can also be a flange seat, and the main body interface can be a flange hole on the main body docking seat 12. When the lifting member 22 pushes the upper sealing plate 21, the lifting member 22 will apply a reaction force to the lower sealing plate 23, causing the lower sealing plate 23 to move towards the main body docking seat 12. By setting the main body docking seat 12, the lower sealing plate 23 can be held and limited, thereby facilitating the force on the lifting member 22. At the same time, by setting the lower sealing plate 23 to be sealed against the main body docking seat 12, the valve port of the storage tank can be sealed, thereby preventing gas from overflowing from the storage tank and affecting the operation of the inspection personnel during inspection. In summary, the sealing component 2 of the present invention can simultaneously achieve bidirectional isolation between the air outlet of the storage tank and the valve port of the breather valve during use, and the upper sealing plate 21 and the lower sealing plate 23 are pushed to opposite ends by the lifting member 22, which can ensure the bidirectional isolation and sealing effect of the sealing component 2.

[0094] like Figure 1 and Figure 2 As shown in the embodiment of the present invention, a second recessed groove is provided on the inner side of the main body docking seat 12, and a lower positioning block 18 is provided on the edge of the second recessed groove. The valve body interface is opened on the bottom wall of the second recessed groove, and the remaining part of the bottom wall of the groove forms a second protrusion 121. The lower sealing plate 23 extends into the second recessed groove and abuts against the bottom wall of the second recessed groove. The lower positioning block 18 is used to abut and position the peripheral wall of the lower sealing plate 23. The cooperation form between the lower sealing plate 23 and the main body docking seat 12 can be the same as the cooperation form between the upper sealing plate 21 and the valve body docking seat 11, and will not be repeated here.

[0095] In an embodiment of the present invention, installing the sealing assembly 2 into place further includes installing the lower sealing plate 23 in the second sinking groove and limiting and resisting it with the lower positioning block 18.

[0096] In embodiments of the present invention, the number of lower positioning blocks 18 may also be multiple.

[0097] In an embodiment of the present invention, a flexible sealing diaphragm 212 may also be provided on the lower sealing plate 23.

[0098] In an embodiment of the present invention, a handle 24 is also provided on the lower sealing plate 23. By providing the handle 24, the lower sealing plate 23 can be easily disassembled and assembled.

[0099] In an embodiment of the present invention, one end of the air injection pipe 3 is placed in the space between the upper sealing plate 21 and the lower sealing plate 23, and the other end passes through the upper sealing plate 21 and is used to connect to the inner cavity of the breathing valve. The air injection pipe 3 can be integrally formed or integrally welded with the upper sealing plate 21.

[0100] In embodiments of the present invention, the upper positioning block 17 and the lower positioning block 18 can be disposed on the corresponding docking seat by welding or integral molding.

[0101] like Figure 3 As shown, in an embodiment of the present invention, the lifting member 22 can be a cylinder, the cylinder body of which is fixedly mounted on the lower sealing plate 23, and the cylinder rod is movably hinged to the upper sealing plate 21. The cylinder rod and the upper sealing plate 21 can be spherically hinged. By hinged to the end of the cylinder rod on the upper sealing plate 21, the angle and posture of the upper sealing plate 21 can be adaptively adjusted after the upper sealing plate 21 presses against the valve body mounting seat, so that the upper sealing plate 21 presses against the valve body docking seat 11 in the most suitable posture.

[0102] In embodiments of the present invention, the pneumatic pressure of the cylinder can be 0.2MPa to 0.4MPa, preferably 0.3MPa, which can ensure a leak-free seal and prevent the flexible sealing diaphragm 212 from being crushed.

[0103] In an embodiment of the present invention, the cylinder stroke is configured such that after the upper sealing plate 21 contacts the valve body docking seat 11, there is still at least 10 mm of stroke to ensure effective clamping.

[0104] like Figure 1 As shown, in an embodiment of the present invention, a door sealing structure 15, such as a sealing groove plus a sealing ring, is provided between the end edge of the pressure-closing door 14 and the inspection channel 13. By providing the door sealing structure 15, the sealing performance of the valve chamber 1 when the inspection channel 13 is closed can be guaranteed.

[0105] like Figure 1 As shown, in the embodiment of the present invention, the pressure-closing door 14 and the wall of the connecting valve chamber 1 are respectively provided with alignment locking structures 16, such as shaft hole alignment structures, etc. By providing alignment locking structures 16, the pressure-closing door 14 can be easily pressed and locked.

[0106] like Figure 1 As shown, in an embodiment of the present invention, a drawer-shaped protrusion is provided on the wall of the connecting valve chamber 1. By providing the drawer-shaped protrusion, it is convenient to install the door 14 and to insert the sealing component 2.

[0107] In embodiments of the present invention, the plate bodies 211 of the upper sealing plate 21 and the lower sealing plate 23 can be made of stainless steel or copper.

[0108] In embodiments of the present invention, the diameter of the gas injection channel can be 5mm to 40mm, preferably 20mm. This diameter range can achieve stable gas supply and effectively solve the problem of inaccurate test pressure.

[0109] Example 2:

[0110] like Figure 5 and Figure 6 As shown, to achieve the above objectives, the present invention also provides a tank assembly, wherein the tank assembly includes a tank body 4, a bidirectional sealing inspection device for testing a breather valve as described above, and a breather valve 5. The connecting valve chamber 1 in the sealing inspection device is installed on the tank body 4 and the interface at one end of the connecting valve chamber 1 is connected to the breather interface of the tank body 4. The breather valve 5 is installed on the connecting valve chamber 1 and the valve port of the breather valve is connected to the interface at the other end of the connecting valve chamber 1.

[0111] Specifically, valve body docking seat 11 and main body docking seat 12 can be respectively provided at the upper and lower ends of the valve chamber 1. Valve body docking seat 11 and main body docking seat 12 are respectively provided with valve body interface and main body interface. The size of valve body interface is the same as the valve port size of breather valve, and the size of main body interface is the same as the breather interface size of storage tank body 4. Main body docking seat 12 is used to connect with the breather interface flange of storage tank body 4, and valve body docking seat 11 is used to connect with the valve port flange of breather valve. When in normal use, the pressure shut-off door 14 is kept closed. At this time, the breather valve and storage tank can be connected through the two end interfaces of valve chamber 1. When the breather valve needs to be inspected, the inspection channel 13 can be opened first, and then the sealing assembly 2 can be installed in the connecting valve chamber 1 through the inspection channel 13. After the sealing assembly 2 is installed in place, the upper sealing plate 21 and the lower sealing plate 23 can be pushed by the lifting component 22 to seal the valve port of the breather valve and the breathing interface of the tank body 4, so that the breather valve and the tank body 4 are isolated from the outside world. This not only provides the necessary environment for the inspection of the breather valve, but also prevents the gas in the tank body 4 from affecting the surrounding workers.

[0112] Example 3:

[0113] like Figure 5As shown, to achieve the above objectives, the present invention also provides a gas supply system 6, which includes a gas source 61, a main inspection pipe 62, and a main gas supply pipe 63. One end of the main inspection pipe 62 is connected to the gas source 61, and the other end is connected to the gas injection pipe 3. The main inspection pipe 62 is provided with a positive pressure inspection branch 621 and a negative pressure inspection branch 622 arranged in parallel. The positive pressure inspection branch 621 and the negative pressure inspection branch 622 are selected by a pipeline selection valve 623. Compared with the positive pressure inspection branch 621, the negative pressure inspection branch 622 is also provided with a negative pressure generator 624. The main inspection pipe 62 is also provided with a flow rate inspection element 625 and a pressure inspection element 626 for inspecting the flow rate and pressure of the two branches respectively. Furthermore, the end of the main inspection pipe 62 connected to the gas injection pipe 3 is also provided with a pressure regulating valve 627. The pressure regulating valve 627 is used to regulate the pressure output by the two branches to the gas injection pipe 3. The opening degree of the pressure regulating valve 627 can be precisely controlled by a controller and a corresponding algorithm. In order to prevent the negative pressure from collapsing the pipe, the pipe also needs to have a certain strength.

[0114] In this embodiment of the invention, the main gas supply pipe 63 is mainly used to supply gas to the lifting component 22.

[0115] Example 4:

[0116] like Figure 5 , Figure 6 and Figure 7 As shown, to achieve the above objectives, the present invention also provides a method for in-situ testing of a breathing valve, the method comprising:

[0117] S100: Provides a tank assembly as described above;

[0118] S200: Control the lifting component 22 to lift, so as to drive the upper sealing plate 21 to move toward the valve port of the breather valve 5 and apply a preset lifting pressure to the upper sealing plate 21;

[0119] S300: Inject gas into gas injection line 3 to test the breather valve.

[0120] A sealing inspection device and a breather valve 5 are sequentially installed on the main body 4 of the storage tank to form the tank assembly. During normal use, the sealing component 2 can be removed from the connecting valve chamber 1 to connect the main body 4 of the storage tank with the breather valve 5, thereby balancing the pressure inside the tank. When the breather valve 5 needs to be inspected, the sealing component 2 can be placed in the connecting valve chamber 1 through the inspection channel 13, and the lifting component can be controlled to lift so that the upper sealing plate 21 blocks the valve port of the breather valve. Sufficient lifting pressure is applied to the upper sealing plate 21 by the lifting component to ensure the tight sealing force between the upper sealing plate 21 and the valve body mating seat 11, ensuring the isolation effect of the breather valve. After isolating the breather valve from the external environment, the main inspection pipe 62 can be connected to the air injection pipe 3, and the main air supply pipe 63 can be connected to the cylinder to conduct the breather valve inspection test.

[0121] Example 5:

[0122] like Figure 5 , Figure 6 and Figure 8 As shown, in an embodiment of the present invention, the inspection of the breathing valve includes inspecting the positive pressure opening pressure of the breathing valve and injecting gas into the gas injection pipe 3 to inspect the breathing valve. The specific steps include:

[0123] S301: Inject positive pressure gas into the gas injection pipe 3, adjust the initial pressure of the positive pressure gas until the positive pressure breathing start plate 51 of the breathing valve 5 is fully opened;

[0124] S302: After confirming that the positive pressure breathing start plate 51 of the breathing valve 5 is fully open, gradually reduce the pressure of the positive pressure gas;

[0125] S303: When the positive pressure breathing starter plate 51 returns to its seat and vibrates, and the leakage flow rate of the positive pressure gas being tested satisfies Q(t+1)-Q(t)≤ preset value, record the current pressure of the positive pressure gas;

[0126] Record the current pressure of the positive pressure gas as the positive pressure opening pressure of the breather valve 5.

[0127] Taking a 5000 cubic meter benzene storage tank as an example, the breather valve inlet flange diameter is DN200, the pressure valve opening pressure on the nameplate is 1350 Pa, and the pressure valve leakage rate is 0.001 m³ / s. 3 / h; the vacuum valve's opening pressure is -350Pa, and the pressure valve's leakage rate is 0.001m. 3 / h;

[0128] In an embodiment of the present invention, the two ends of the connecting valve chamber 1 are respectively connected to the tank body 4 and the breather valve to be tested in the form of flanges. The flexible sealing diaphragm 212 is bonded to the plate body by means of adhesive cyanoacrylate material, and the thickness of the sealing diaphragm is preferably 10mm.

[0129] When testing the positive pressure opening pressure of the breathing valve under test, it is necessary to confirm that the breathing valve under test has been isolated by the sealing component 2. Then, according to the data on the nameplate, the output pressure of the main test pipe 62 is set on the host computer. This output pressure needs to ensure that the positive pressure breathing start plate 51 is fully opened.

[0130] After confirming that the positive pressure breathing start plate 51 of the breathing valve 5 is fully open, the gas in the positive pressure test branch 621 will continuously leak from the positive pressure breathing start plate 51. At this time, the flow rate Q(t) on the positive pressure test branch 621 is greater than 0. By adjusting the pressure regulating valve 627, the output pressure of the main test pipe 62 can be gradually reduced. When the positive pressure breathing start plate 51 returns to its seat and vibrates, and the leakage flow rate of the positive pressure gas being tested satisfies Q(t+1)-Q(t)≤ preset value (such as 0.01), the current pressure of the gas on the positive pressure test branch 621 is the positive pressure opening pressure of the breathing valve to be tested.

[0131] Example 6:

[0132] like Figure 5 , Figure 6 and Figure 9 As shown, in an embodiment of the present invention, the inspection of the breathing valve includes inspecting the negative pressure opening pressure of the breathing valve, and injecting gas into the gas injection pipe 3 to inspect the breathing valve. The specific steps include:

[0133] S311: Inject negative pressure gas into the gas injection pipe 3 and adjust the initial pressure of the negative pressure gas until the negative pressure breathing start plate 52 of the breathing valve 5 is fully opened;

[0134] S312: After confirming that the negative pressure breathing start plate 52 of the breathing valve 5 is fully open, gradually increase the pressure of the negative pressure gas;

[0135] S313: When the negative pressure breathing starter plate 52 returns to its seat and vibrates, and the leakage flow rate of the tested negative pressure gas satisfies Q(t+1)-Q(t)≤ preset value, record the current pressure of the negative pressure gas;

[0136] Record the current pressure of the negative pressure gas as the negative pressure opening pressure of the breathing valve 5.

[0137] When testing the negative pressure opening pressure of the breathing valve to be tested, the output pressure of the main test pipe 62 can be set first to make the negative pressure breathing start plate 52 fully open.

[0138] After confirming that the negative pressure breathing start plate 52 is fully open, the outside gas will flow continuously through the negative pressure breathing start plate 52 to the negative pressure generator 624 of the negative pressure test branch 622. At this time, the flow rate Q(t) on the negative pressure test branch 622 is greater than 0. By adjusting the pressure regulating valve 627, the output pressure of the negative pressure test branch 622 can be gradually increased. When the negative pressure breathing start plate 52 returns to its seat and vibrates, and the leakage flow rate of the tested negative pressure gas satisfies Q(t+1)-Q(t)≤ preset value (such as 0.01), the current pressure collected on the negative pressure test branch 622 at this time is the negative pressure opening pressure of the breathing valve to be tested.

[0139] Example 7:

[0140] like Figure 5 , Figure 6 and Figure 10 As shown, in an embodiment of the present invention, inspecting the breathing valve includes inspecting the positive pressure leakage rate of the breathing valve. The specific steps of injecting gas into the gas injection pipe 3 to inspect the breathing valve include:

[0141] S321: Inject positive pressure gas into the gas injection pipe 3 and adjust the initial pressure of the positive pressure gas to be the same as the positive pressure opening pressure of the breather valve 5;

[0142] S322: Gradually reduce the pressure of the positive pressure gas until the current pressure of the positive pressure gas is 0.75 times the initial pressure of the positive pressure gas;

[0143] S323: Collects the flow rate of positive pressure gas after it has stabilized at 0.75 times the initial pressure.

[0144] When measuring the positive pressure leakage rate, first set the output pressure of the positive pressure test branch 621 on the computer. The value of this pressure is exactly the positive pressure opening pressure of the breather valve 5. Then gradually reduce the pressure of the positive pressure gas until the current pressure of the positive pressure gas is 0.75 times the initial pressure of the positive pressure gas. When P(t) = 0.75 times the positive pressure opening pressure, the stable outflow of gas measured by the flow test element 625 on the positive pressure test branch 621 is the positive pressure leakage rate of the breather valve under test.

[0145] Example 8:

[0146] like Figure 5 , Figure 6 and Figure 10 As shown, in an embodiment of the present invention, inspecting the breathing valve includes inspecting the negative pressure leakage rate of the breathing valve. The specific steps of injecting gas into the gas injection pipe 3 to inspect the breathing valve include:

[0147] S331: Inject negative pressure gas into the gas injection pipe 3 and adjust the initial pressure of the negative pressure gas to be the same as the negative pressure opening pressure of the breathing valve 5;

[0148] S332: Gradually increase the pressure of the negative pressure gas until the current pressure of the negative pressure gas is 0.75 times the initial pressure of the negative pressure gas;

[0149] S333: Collects the flow rate of negative pressure gas after it stabilizes at 0.75 times the initial pressure.

[0150] When measuring the negative pressure leakage rate, first set the output pressure of the negative pressure test branch 622 on the computer. The value of this pressure is exactly the negative pressure opening pressure of the breather valve 5. Then gradually reduce the pressure of the negative pressure gas until the current pressure of the negative pressure gas is 0.75 times the initial pressure of the negative pressure gas, that is, P(t) = 0.75 times the negative pressure opening pressure. At this time, the flow rate measured by the flow test element 625 on the negative pressure test branch 622 is the negative pressure leakage rate of the breather valve under test.

[0151] In summary, the sealing inspection device provided by this invention uses a cylinder to provide the required clamping and sealing force for the sealing component 2, which, in conjunction with the diaphragm on the sealing plate, achieves efficient sealing. When the breather valve 5 needs to be inspected, simply placing the sealing component 2 into the connecting valve chamber 1 creates a separation environment between the tank body 4 and the breather valve 5, eliminating the need to disassemble the breather valve 5, thus improving inspection efficiency and reducing inspection costs. Furthermore, the inspection method based on this device does not require complex equipment or specialized skills to complete the inspection, making it simple to operate and highly applicable. Moreover, the air injection pipe 3 is located on the upper sealing plate 21, avoiding the need for openings on the outer wall of the valve chamber and enhancing the stability of the valve body structure. In addition, this device has a simple structure, is easy to operate, and can be applied to the performance inspection of various types of breather valves 5.

[0152] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0153] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0154] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0155] Although embodiments of the present invention have been described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bidirectional sealing inspection device for a breather valve, characterized in that, The bidirectional sealing inspection device for the breather valve includes: The connecting valve chamber (1) has interfaces at both ends. The chamber wall of the connecting valve chamber (1) is also provided with an inspection channel (13), which is opened and closed by a pressure door (14). A sealing assembly (2), installed within the connecting valve chamber (1) and including an upper sealing plate (21) for sealing an interface at one end of the connecting valve chamber (1) and a lifting member (22) for providing a sealing clamping force to the upper sealing plate (21); and The gas injection pipe (3) has one end located inside the connecting valve chamber (1) and the other end passing through the upper sealing plate (21).

2. The bidirectional sealing inspection device for a breather valve according to claim 1, characterized in that, One end of the connecting valve chamber (1) is provided with a valve body docking seat (11), and the valve body docking seat (11) is provided with a valve body interface. The upper sealing plate (21) is sealed against the inner side of the valve body docking seat (11) and closes the valve body interface.

3. The bidirectional sealing inspection device for a breather valve according to claim 2, characterized in that, The valve body docking seat (11) has a first sinking groove that sinks outward on its inner side. The valve body interface is opened on the bottom wall of the first sinking groove. The upper sealing plate (21) extends into the first sinking groove and seals against the bottom wall of the first sinking groove.

4. The bidirectional sealing inspection device for a breather valve according to claim 3, characterized in that, The valve body docking seat (11) is also provided with an upper positioning block (17), which is used to support and position the peripheral wall of the upper sealing plate (21) when the upper sealing plate (21) is inserted into the first sinking groove.

5. The bidirectional sealing inspection device for a breather valve according to claim 4, characterized in that, The number of the upper positioning blocks (17) is multiple, and the multiple upper positioning blocks (17) are arranged sequentially at intervals along the edge of the first sinking trough.

6. The bidirectional sealing inspection device for a breather valve according to claim 2, characterized in that, The upper sealing plate (21) includes a plate body (211) and a flexible sealing diaphragm (212) attached to the outside of the plate body (211). The flexible sealing diaphragm (212) is disposed facing the valve body docking seat (11) and is used to seal against the valve body docking seat (11).

7. The bidirectional sealing inspection device for a breather valve according to claim 6, characterized in that, The flexible sealing diaphragm (212) is made of nitrile rubber.

8. The bidirectional sealing inspection device for a breather valve according to claim 6, characterized in that, The thickness of the flexible sealing diaphragm (212) is 1.5 to 2.5 mm.

9. The bidirectional sealing inspection device for a breather valve according to claim 6, characterized in that, The flexible sealing diaphragm (212) is bonded to the plate body (211) by means of cyanoacrylate material.

10. The bidirectional sealing inspection device for a breather valve according to claim 2, characterized in that, The connecting valve chamber (1) is provided with a main body docking seat (12) at the opposite end. The main body docking seat (12) is provided with a main body interface. The sealing assembly (2) also includes a lower sealing plate (23) disposed at the end of the lifting member (22) away from the upper sealing plate (21). The lower sealing plate (23) seals against the inner side of the main body docking seat (12) and closes the main body interface.

11. The bidirectional sealing inspection device for a breather valve according to claim 10, characterized in that, The inner side of the main docking seat (12) is provided with a second sinking groove, and the side of the second sinking groove is provided with a lower positioning block (18). The valve body interface is opened on the bottom wall of the second sinking groove. The lower sealing plate (23) extends into the second sinking groove and abuts against the bottom wall of the second sinking groove. The lower positioning block (18) is used to abut and position the peripheral wall of the lower sealing plate (23).

12. The bidirectional sealing inspection device for a breather valve according to claim 10, characterized in that, The lower sealing plate (23) is also provided with a handle (24).

13. The bidirectional sealing inspection device for a breather valve according to claim 10, characterized in that, The lifting component (22) is a cylinder, the cylinder body is fixedly installed on the lower sealing plate (23), and the cylinder rod is movably hinged to the upper sealing plate (21).

14. The bidirectional sealing inspection device for a breather valve according to claim 10, characterized in that, The two-way sealing test device for the breathing valve also includes an air supply mechanism for supplying air to the lifting member (22), the output pressure of which is 0.2MPa to 0.4MPa.

15. The bidirectional sealing inspection device for a breather valve according to any one of claims 1 to 9, characterized in that, The diameter of the gas injection pipe (3) is 5mm to 40mm.

16. A tank assembly, characterized in that, The tank assembly includes: Tank body (4); According to any one of claims 1 to 15, the bidirectional sealing test device for a breather valve is wherein the connecting valve chamber (1) is mounted on the tank body (4) and one end of the connecting valve chamber (1) is connected to the breather port of the tank body (4); and A breathing valve (5) is installed on the connecting valve chamber (1) and the valve port of the breathing valve (5) is connected to the interface at the other end of the connecting valve chamber (1).

17. A method for in-situ testing of a breathing valve, characterized in that, The in-situ testing method for the breathing valve includes: Provide the tank assembly as claimed in claim 16; Control the lifting component (22) to lift, so as to drive the upper sealing plate (21) to move toward the valve port of the breathing valve (5) and apply a preset lifting pressure to the upper sealing plate (21); Gas is injected into the gas injection pipe (3) to test the breathing valve.

18. The in-situ inspection method for a breathing valve according to claim 17, characterized in that, The steps of inspecting the breathing valve include checking the positive pressure opening pressure of the breathing valve and injecting gas into the gas injection pipe (3) to inspect the breathing valve. Inject positive pressure gas into the gas injection pipe (3), and adjust the initial pressure of the positive pressure gas until the positive pressure breathing start plate (51) of the breathing valve (5) is fully opened; After confirming that the positive pressure breathing start plate (51) of the breathing valve (5) is fully open, gradually reduce the pressure of the positive pressure gas; When the positive pressure breathing starter plate (51) returns to its seat and vibrates, and the leakage flow rate of the positive pressure gas is Q(t+1)-Q(t)≤ preset value, the current pressure of the positive pressure gas is recorded. The current pressure of the positive pressure gas is recorded as the positive pressure opening pressure of the breathing valve (5).

19. The in-situ inspection method for a breathing valve according to claim 17, characterized in that, The steps of inspecting the breathing valve include checking the negative pressure opening pressure of the breathing valve and injecting gas into the gas injection pipe (3) to inspect the breathing valve. Inject negative pressure gas into the gas injection pipe (3) and adjust the initial pressure of the negative pressure gas until the negative pressure breathing start plate (52) of the breathing valve (5) is fully opened; After confirming that the negative pressure breathing start plate (52) of the breathing valve (5) is fully open, gradually increase the pressure of the negative pressure gas; When the negative pressure breathing starter plate (52) returns to its seat and vibrates, and the leakage flow rate of the negative pressure gas is Q(t+1)-Q(t)≤ preset value, the current pressure of the negative pressure gas is recorded. The current pressure of the negative pressure gas is recorded as the negative pressure opening pressure of the breathing valve (5).

20. The in-situ inspection method for a breathing valve according to claim 17, characterized in that, The inspection of the breather valve includes testing the positive pressure leakage rate of the breather valve. The specific steps of injecting gas into the gas injection pipe (3) to inspect the breather valve include: Inject positive pressure gas into the gas injection pipe (3) and adjust the initial pressure of the positive pressure gas to be the same as the positive pressure opening pressure of the breather valve (5); Gradually reduce the pressure of the positive pressure gas until the current pressure of the positive pressure gas is 0.75 times the initial pressure of the positive pressure gas; The flow rate of the positive pressure gas was collected after it stabilized at 0.75 times the initial pressure.

21. The in-situ inspection method for a breathing valve according to claim 17, characterized in that, The inspection of the breathing valve includes testing the negative pressure leakage rate of the breathing valve. The specific steps of injecting gas into the gas injection pipe (3) to inspect the breathing valve include: Inject negative pressure gas into the gas injection pipe (3) and adjust the initial pressure of the negative pressure gas to be the same as the negative pressure opening pressure of the breathing valve (5); Gradually increase the pressure of the negative pressure gas until the current pressure of the negative pressure gas is 0.75 times the initial pressure of the negative pressure gas; The flow rate of the negative pressure gas was collected after it stabilized at 0.75 times the initial pressure.

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