Breather valve assembly with sealing inspection structure and tank body assembly

Abstract

The invention belongs to the technical field of storage tank safety and provides a breather valve assembly with a sealing inspection structure and a tank assembly.The breather valve assembly with the sealing inspection structure comprises a breather valve body, a connecting valve bin and a sealing assembly, and the breather valve body is provided with a valve port connecting end; the connecting valve bin is arranged on the valve port connecting end, a port in one end of the connecting valve bin communicates with a breather valve cavity of the breather valve body, and the bin wall of the connecting valve bin is provided with an inspection channel and a pressing-closing door used for opening and closing the inspection channel. The sealing assembly is installed in the connecting valve bin and comprises an upper sealing plate used for blocking the valve port connecting end and the connecting valve bin and a jacking piece used for providing blocking pressing force for the upper sealing plate, and a penetrating gas injection pipeline is arranged on the upper sealing plate. According to the device, the breather valve body can be simply and quickly isolated from the external environment, the breather valve body 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 breather valve assembly with a sealing inspection structure and a tank assembly. Background Technology

[0002] Breathing valves on storage tanks automatically balance the pressure between the tank and the external environment when the tank is pressurized or under negative pressure. Currently, domestic and international breathing valves use PTFE or FEP membranes for sealing. These materials have poor durability and cannot self-recover after deformation, leading to significant leakage problems exceeding 2000 ppm. With increased use, the repeated impact of the tank's vapor on the valve disc causes it to become heavier, frequently resulting in jamming, adhesion, and blockage. Furthermore, current integrated and split-type breathing valves have asymmetrical designs, leaving the valve disc in an off-center state after opening, making them prone to jamming and valve stem breakage. Moreover, the performance of breathing valves gradually decreases over time and with changing operating conditions, leading to increased VOCs leakage and failure to meet environmental protection requirements. Therefore, regular inspection of breathing valves is necessary. GB / T 37327-2019 "Integrity Management of Atmospheric Pressure Storage Tanks" stipulates that breathing valves should be inspected at least once a year, including visual inspection, opening pressure, and leakage testing. 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.

[0003] In summary, breather valves suffer from leakage problems during long-term use, and the annual inspection process is complex and prone to damage to the seals. Therefore, there is an urgent need to develop a low-leakage breather valve with a bidirectional sealing inspection structure to achieve low leakage and in-situ inspection of the breather valve, thereby ensuring the safety of the tank area. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies, the present invention provides a breather valve assembly and a tank assembly with a sealing inspection structure, aiming to solve the technical problem that existing breather valves require disassembly for inspection.

[0005] To achieve the above objectives, the present invention provides a breather valve assembly with a sealing inspection structure. The breather valve assembly with the sealing inspection structure includes a breather valve body, a connecting valve chamber, and a sealing component. The breather valve body has a valve port connection end. The connecting valve chamber is disposed on the valve port connection end, and one end of the valve port is connected to the breather valve cavity of the breather valve body. The connecting valve chamber wall has an inspection channel and a pressure-closing door for opening and closing the inspection channel. The sealing component is installed in the connecting valve chamber and includes an upper sealing plate for blocking the valve port connection end from the connecting valve chamber and a lifting member for providing blocking pressure to the upper sealing plate. The upper sealing plate has a through-hole air injection pipe.

[0006] In embodiments of the present invention, the connecting valve chamber can be integrated with the breather valve body by welding, or a segmented design can be achieved by connecting it with a connector.

[0007] In an embodiment of the present invention, one end of the connecting valve chamber is provided with a valve body docking seat for docking with the valve port connection end. The valve body docking seat is provided with a valve body interface for communicating with the breathing valve chamber. The upper sealing plate is used to seal and support the side of the valve body docking seat facing away from the valve port connection end and to block the valve body interface.

[0008] In an embodiment of the present invention, a first recessed groove is provided on the side of the valve body docking seat facing away from the valve port connection end, the valve body interface is opened on the bottom wall of the first recessed groove, the remaining part of the first recessed groove forms a first boss, and the upper sealing plate is used to extend into the first recessed groove and seal against the first boss.

[0009] 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.

[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 an embodiment of the present invention, a main body docking seat is provided at the end of the connecting valve chamber away from the valve port connection end, 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 is used to seal and support the main body docking seat and block the main body interface.

[0012] In an embodiment of the present invention, a second recessed groove is provided on the side of the main body docking seat facing the valve port connection end, the main body interface is opened on the bottom wall of the second recessed groove, the remaining part of the bottom wall of the second recessed groove forms a second boss, and the lower sealing plate is used to extend into the second recessed groove and abut against the second boss.

[0013] In an embodiment of the present invention, the main body docking seat is further provided with a lower positioning block, which is used to support and position the peripheral wall of the lower sealing plate when the lower sealing plate extends into the second sinking groove.

[0014] In an embodiment of the present invention, a handle is also provided on the lower sealing plate.

[0015] 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.

[0016] In an embodiment of the present invention, the breathing valve body is provided with a positive pressure breathing channel and a negative pressure breathing channel that are connected to the outside world and the breathing valve cavity, respectively. The positive pressure breathing channel and the negative pressure breathing channel are blocked by a positive pressure start-up valve disc and a negative pressure start-up valve disc, respectively. The positive pressure start-up valve disc is used to open when the pressure in the breathing valve cavity is greater than the positive pressure start-up pressure, and the negative pressure start-up valve disc is used to open when the pressure in the breathing valve cavity is less than the negative pressure start-up pressure.

[0017] In an embodiment of the present invention, the positive pressure breathing channel and the breathing valve chamber are separated by a first valve seat. The first valve seat is provided with a first seat channel that connects the positive pressure breathing channel and the breathing valve chamber. A positive pressure start valve disc is disposed in the positive pressure breathing channel and is located in the first seat channel. The positive pressure start valve disc can move along the outlet direction of the first seat channel and is used to block the first seat channel from the outside.

[0018] In an embodiment of the present invention, the outlet side of the first valve seat is provided with a protruding first annular flange, the first annular flange surrounds the outlet forming the first seat channel, the positive pressure start valve disc is provided with a valve disc sealing diaphragm on the side of the first annular flange facing the first valve seat, and the valve disc sealing diaphragm on the positive pressure start valve disc is used to seal against the outer edge of the first annular flange.

[0019] In an embodiment of the present invention, the outer end of the first annular protrusion is provided with a first sealing tooth cone arranged in an annular shape, and the side of the positive pressure start valve disc facing the first valve seat is provided with a first toothed groove for engaging with the first sealing tooth cone; or the side of the positive pressure start valve disc facing the first valve seat is provided with a first sealing tooth cone, and the outer end of the first annular protrusion is provided with a first toothed groove for engaging with the first sealing tooth cone.

[0020] In an embodiment of the present invention, the first sealing tooth cone has multiple layers, and the multiple layers of the first sealing tooth cone are arranged radially at intervals. The number of layers of the first tooth groove corresponds one-to-one with the number of the first sealing tooth cone.

[0021] In an embodiment of the present invention, the edge of the positive pressure start-up valve disc is also provided with a rotor, which is located outside the first annular protrusion when the positive pressure start-up valve disc blocks the first seat channel.

[0022] In an embodiment of the present invention, a first guide structure is provided in the positive pressure breathing channel or breathing valve cavity. The first guide structure is used to guide the positive pressure start-up valve disc to move in the direction of the outlet of the first seat channel.

[0023] In an embodiment of the present invention, the first guide structure is provided with a first guide channel extending in the outlet direction of the first seat channel, and the positive pressure start valve disc is provided with a first valve stem for extending into the first guide channel, and a ball bearing is provided between the first valve stem and the side wall of the first guide channel.

[0024] In an embodiment of the present invention, the negative pressure breathing channel and the breathing valve chamber are separated by a second valve seat. The second valve seat is provided with a second seat channel that connects the negative pressure breathing channel and the breathing valve chamber. The negative pressure start valve disc is disposed in the breathing valve chamber and is located in the second seat channel. The negative pressure start valve disc is positioned along the outlet direction of the second seat channel and is used to block the second seat channel from the inside.

[0025] In an embodiment of the present invention, the outlet side of the second valve seat is provided with a protruding second annular flange, the second annular flange surrounds the outlet forming the second seat channel, the negative pressure start valve disc is disposed in the breathing valve cavity and is disposed opposite to the second annular flange, the side of the negative pressure start valve disc facing the second valve seat is provided with a valve disc sealing diaphragm, the valve disc sealing diaphragm on the negative pressure start valve disc is used to seal and abut against the inner end edge of the second annular flange.

[0026] In an embodiment of the present invention, the outer end of the second annular protrusion is provided with a second sealing tooth cone, and the side of the negative pressure start valve disc facing the second valve seat is provided with a second toothed groove for engaging with the second sealing tooth cone; or the side of the negative pressure start valve disc facing the second valve seat is provided with a second sealing tooth cone, and the outer end of the second annular protrusion is provided with a second toothed groove for engaging with the second sealing tooth cone.

[0027] In an embodiment of the present invention, a second guide structure is provided in the negative pressure breathing channel or breathing valve cavity. The second guide structure is used to guide the negative pressure start-up valve disc in the outlet direction of the second seat channel.

[0028] In embodiments of the present invention, fire-resistant mesh and rainproof covers are respectively provided at the outlets of the positive pressure breathing channel and the negative pressure breathing channel.

[0029] In an embodiment of the present invention, the valve port connection end and the breather valve body are connected by an arc-shaped transition.

[0030] To achieve the above objectives, the present invention also provides a storage tank assembly, wherein the storage tank assembly includes a breather valve assembly with a sealing inspection structure as described above and a storage tank body, and the air outlet of the storage tank body is connected to a port at the end of the connecting valve compartment away from the breather valve body.

[0031] Through the above technical solution, the breather valve assembly with a sealing inspection structure provided in this embodiment of the invention has the following beneficial effects:

[0032] When using a breather valve assembly with a sealing inspection structure, the port furthest from the breather valve body in the connecting valve chamber can be connected to the pressure balance port of the storage tank, and the pressure-closing valve can be closed. The connecting valve chamber ensures communication between the breather valve body and the storage tank. When the breather valve needs inspection, the inspection channel can be opened, and the sealing assembly can be installed inside the connecting valve chamber through the inspection channel. After the sealing assembly is in place, the upper sealing plate is pushed up by the lifting component to seal the valve port connection end of the breather valve body, thus isolating the breather valve cavity and providing the necessary sealing environment for the inspection of the breather valve body. Once the breather valve cavity is isolated, simply inject test gas into the injection pipeline to achieve online testing of the breather valve body's opening pressure and leakage. In summary, the breather valve assembly with a sealing inspection structure in this invention can easily and quickly isolate the breather valve body from the external environment and the storage tank, providing the necessary sealing environment for the inspection of the breather valve body. Simultaneously, the inspection process does not require disassembly of the breather valve body, effectively reducing inspection costs. Furthermore, by applying sealing and clamping force through the lifting component, the isolation effect of the breather valve body 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.

[0033] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0034] 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:

[0035] Figure 1 This is a cross-sectional schematic diagram of a breather valve assembly with a sealing inspection structure according to an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of the overall structure of the breather valve assembly with a sealing inspection structure according to an embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of the overall structure when the connecting valve chamber and the sealing assembly are engaged according to an embodiment of the present invention;

[0038] Figure 4 This is a cross-sectional structural diagram of the connection valve chamber and sealing assembly when they are engaged according to an embodiment of the present invention.

[0039] Figure 5This is a schematic diagram of the sealing assembly according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the specific structure of the upper sealing plate according to an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the positive pressure start valve plate and the first annular convex edge in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram showing the connection between the tank assembly and the gas supply system according to an embodiment of the present invention.

[0043] Figure 9 This is a flowchart of the online testing method for a breathing valve according to an embodiment of the present invention;

[0044] Figure 10 This is a first detailed step diagram of step S300 according to an embodiment of the present invention;

[0045] Figure 11 This is a second detailed step diagram of step S300 according to an embodiment of the present invention;

[0046] Figure 12 This is a diagram illustrating the third specific step of step S300 according to an embodiment of the present invention;

[0047] Figure 13 This is a diagram illustrating the fourth specific step of step S300 according to an embodiment of the present invention.

[0048] Explanation of reference numerals in the attached figures

[0049] 1. Connecting valve compartment 11. Valve body docking seat

[0050] 111 First boss 12 Main body docking seat

[0051] 121 Second protrusion 13 Inspection channel

[0052] 14. Pressure-closing door 15. Door sealing structure

[0053] 16 Alignment and locking structure 17 Upper positioning block

[0054] 18 Lower positioning block 2 sealing assembly

[0055] 21 Top sealing plate 211 Plate body

[0056] 212 Flexible sealing diaphragm 213 Diaphragm holder

[0057] 214 Diaphragm positioning rod 22 Lifting component

[0058] 23 Bottom sealing plate 24 Handle

[0059] 3. Inflation pipe; 4. Breathing valve body

[0060] 41 Valve port connection end 421 Positive pressure breathing channel

[0061] 422 Negative pressure breathing channel 43 Breathing valve chamber

[0062] 44 First valve seat 441 First seat body passage

[0063] 442 First annular flange 443 First sealing tooth cone

[0064] 45 Second valve seat 451 Second seat body passage

[0065] 452 Second annular flange 453 Second sealing tooth cone

[0066] 51 Positive pressure start-up valve disc 511 Rotor

[0067] 512 First toothed groove 513 First valve stem

[0068] 52 Negative pressure start-up valve disc 53 Valve disc sealing diaphragm

[0069] 61 First guide structure 62 Ball bearing

[0070] 63 Fire-resistant mesh 64 Rainproof cover

[0071] 7. Gas Supply System 71. Gas Source

[0072] 72 Inspection main line; 721 Positive pressure inspection branch.

[0073] 722 Negative pressure test branch; 723 Pipeline selection valve

[0074] 724 Negative Pressure Generator; 725 Flow Measurement Element

[0075] 726 Pressure testing element; 727 Pressure regulating valve

[0076] 73 Gas supply main line 8 Storage tank body Detailed Implementation

[0077] 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.

[0078] The breather valve assembly with a sealing inspection structure of the present invention is described below with reference to the accompanying drawings.

[0079] Example 1:

[0080] This invention provides a breather valve assembly with a sealing inspection structure, such as... Figure 1 , Figure 2 and Figure 3 As shown, the breather valve assembly with a sealing inspection structure includes:

[0081] The breathing valve body 4 has a breathing valve chamber 43 inside, and one end of it is a valve port connection end 41;

[0082] A connecting valve chamber 1 is provided, located on the valve port connection end 41, with ports at opposite ends. One port of the connecting valve chamber 1 communicates with the breathing valve chamber 43. The chamber wall of the connecting valve chamber 1 also has an inspection channel 13 and a pressure-closing door 14 for opening and closing the inspection channel 13.

[0083] The sealing assembly 2 is installed in the connecting valve chamber 1 and includes an upper sealing plate 21 for blocking the valve port connection end 41 from the connecting valve chamber 1 and a lifting member 22 for providing blocking and clamping force to the upper sealing plate 21. The upper sealing plate 21 is provided with a through air injection pipe 3, which is used to connect the breathing valve chamber 43 and the inner cavity of the connecting valve chamber 1 when the upper sealing plate 21 blocks the valve port connection end 41.

[0084] When using the breather valve assembly with a sealing inspection structure, the port of the connecting valve chamber 1 furthest from the breather valve body 4 can be connected to the pressure balance port of the storage tank, and the pressure-closing valve 14 can be closed. The connecting valve chamber 1 ensures communication between the breather valve body 4 and the storage tank. When the breather valve needs inspection, the inspection channel 13 can be opened, 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, the sealing plate 21 is pushed up by the lifting member 22, sealing the valve port connection end 41 of the breather valve body 4, thus isolating the breather valve chamber 43 and providing the necessary sealing environment for the inspection of the breather valve body 4. When the breather valve chamber 43 is isolated, only inspection gas needs to be injected into the injection pipe 3 to achieve online testing of the opening pressure and leakage of the breather valve body 4. In summary, the breather valve assembly with a sealing inspection structure in this invention can easily and quickly isolate the breather valve body 4 from the external environment and the storage tank, providing the necessary sealing environment for the inspection of the breather valve body 4; at the same time, the inspection process does not require the removal of the breather valve body 4, effectively reducing inspection costs; furthermore, by applying sealing and clamping force through the lifting component 22, the isolation effect of the breather valve body 4 can be guaranteed, ensuring no gas leakage during the inspection process and guaranteeing the accuracy of the inspection results; in addition, 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.

[0085] In embodiments of the present invention, the connecting valve chamber can be integrally installed with the breather valve body by welding, or segmented installation can be achieved by connecting with connectors.

[0086] like Figure 1 , Figure 3 and Figure 4 As shown, in an embodiment of the present invention, one end of the connecting valve chamber 1 is provided with a valve body docking seat 11 for docking with the valve port connecting end 41. The valve body docking seat 11 is provided with a valve body interface for communicating with the breathing valve chamber 43. The upper sealing plate 21 is used to seal and support the side of the valve body docking seat 11 facing away from the valve port connecting end 41 and to block the valve body interface.

[0087] The valve body docking seat 11 is used to dock with the valve port connection end 41. Both the valve body docking seat 11 and the valve port connection end 41 can be flange seats. 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 the upper sealing plate 21. 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.

[0088] Alternatively, the valve chamber 1 may only include a cylindrical section, and the valve body docking seat 11 may be a structure on the breather valve body, with the cylindrical section connected to the valve body docking seat 11 by welding.

[0089] like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the valve body docking seat 11 has a first recessed groove on the side opposite to the valve port connection end 41. The valve body interface is formed on the bottom wall of the first recessed groove, and the remaining part of the first recessed groove forms a first boss 111. The upper sealing plate 21 extends into the first recessed groove and seals against the first boss 111. By setting the first recessed groove, the upper sealing plate 21 can be easily limited in the radial direction, 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 upper sealing plate 21 can be easily positioned during installation.

[0090] like Figure 4 As shown in the embodiment of the present invention, the valve body docking seat 11 is further provided with an upper positioning block 17. The upper positioning block 17 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 installation and positioning of the upper sealing plate 21 can be further facilitated, ensuring the relative position between the upper sealing plate 21 and the valve body interface.

[0091] 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°.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] like Figure 5 and Figure 6 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 and installed on 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.

[0096] 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.

[0097] like Figure 6 As 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.

[0098] like Figure 4 and Figure 5As shown in the embodiment of the present invention, the main body docking seat 12 has a second recessed groove on the side facing the valve port connection end 41. The main body interface is opened on the bottom wall of the second recessed groove, and the remaining part of the bottom wall of the second recessed groove forms a second protrusion 121. The lower sealing plate 23 extends into the second recessed groove and abuts against the second protrusion 121. 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 abutted and limited, thereby facilitating the force on the lifting member 22. At the same time, by setting the lower sealing plate 23 to seal 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. The fit between the lower sealing plate 23 and the main body docking seat 12 can be the same as the fit between the upper sealing plate 21 and the valve body docking seat 11, and will not be repeated here. In summary, the sealing assembly 2 of the present invention can simultaneously achieve bidirectional isolation between the gas pressure balance port of the storage tank and the valve port of the breather valve during use, and by pushing the upper sealing plate 21 and the lower sealing plate 23 to opposite ends by the lifting member 22, the bidirectional isolation sealing effect of the sealing assembly 2 can be guaranteed.

[0099] 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.

[0100] In embodiments of the present invention, the number of lower positioning blocks 18 may also be multiple.

[0101] In an embodiment of the present invention, a flexible sealing diaphragm 212 may also be provided on the lower sealing plate 23.

[0102] like Figure 5 As shown, in an embodiment of the present invention, the lower sealing plate 23 is also provided with a handle 24. By providing the handle 24, the lower sealing plate 23 can be easily disassembled and assembled.

[0103] like Figure 4 and Figure 5 As shown, in an embodiment of the present invention, one end of the gas 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. The gas injection pipe 3 can be integrally formed or integrally welded with the upper sealing plate 21.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] like Figure 3 and Figure 4 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.

[0109] like Figure 3 and Figure 4 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.

[0110] like Figure 3 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.

[0111] 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.

[0112] 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.

[0113] Example 2:

[0114] like Figure 1 , Figure 2 and Figure 8As shown, in an embodiment of the present invention, in addition to the port provided at the valve port connection end 41, the breathing valve body 4 is also provided with a positive pressure breathing channel 421 and a negative pressure breathing channel 422 that are connected to the outside and the breathing valve cavity 43, respectively. The positive pressure breathing channel 421 and the negative pressure breathing channel 422 are respectively blocked by the positive pressure start valve disc 51 and the negative pressure start valve disc 52. The positive pressure start valve disc 51 is used to open when the pressure in the breathing valve cavity 43 is greater than the positive pressure start pressure, and the negative pressure start valve disc 52 is used to open when the pressure in the breathing valve cavity 43 is less than the negative pressure start pressure. When the pressure inside the storage tank changes, it will affect the pressure in the breathing valve chamber 43. When the breathing valve chamber 43 is severely pressurized, the positive pressure start valve disc 51 will open, and the positive pressure breathing channel 421 will be opened to balance the pressure between the breathing valve chamber 43 and the outside. When the negative pressure effect in the breathing valve chamber 43 is severe, the negative pressure start valve disc 52 will open, and the negative pressure breathing channel 422 will be opened to balance the pressure between the breathing valve chamber 43 and the outside.

[0115] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the positive pressure breathing channel 421 and the breathing valve chamber 43 are separated by a first valve seat 44. The first valve seat 44 is provided with a first seat channel 441 that connects the positive pressure breathing channel 421 and the breathing valve chamber 43. The positive pressure start-up valve disc 51 is disposed in the positive pressure breathing channel 421 and is positioned in the first seat channel 441. The positive pressure start-up valve disc 51 is movable along the outlet direction of the first seat channel 441 (the direction in which gas flows out when the breathing valve chamber 43 is pressurized is the outlet direction) and is used to block the first seat channel 441 from the outside. Specifically, the first valve seat 44 is used to support the positive pressure start-up valve disc 51. The first seat passage 441 on the first valve seat 44 preferably faces upwards. The positive pressure start-up valve disc 51 is located on the outer side of the first valve seat 44 (the side closest to the outside is the outer side) and abuts against the outer end of the first seat passage 441 under the action of gravity, achieving normal blockage of the first seat passage 441. When the breathing valve chamber 43 is severely pressurized, the positive pressure gas in the breathing valve chamber 43 will push the positive pressure start-up valve disc 51 upwards against gravity, allowing the first seat passage 441 to connect with the positive pressure breathing passage 421. When the pressure in the breathing valve chamber 43 is balanced with the outside, the positive pressure start-up valve disc 51 will re-block the first seat passage 441 under the action of gravity. Of course, the opening of the first seat passage 441 can also be set in other directions. In this case, a guide structure and a reset component are needed to achieve automatic reset and sealing of the positive pressure start-up valve disc 51 after it starts to open. For example, the positive pressure start-up valve disc 51 is automatically reset and sealed after being started by a spring.

[0116] like Figure 1As shown, in an embodiment of the present invention, the first valve seat 44 has a protruding first annular flange 442 on the side facing the positive pressure breathing channel 421. The end edge of the first annular flange 442 facing the positive pressure breathing channel 421 is the outer end edge of the first seat channel 441. The positive pressure start-up valve disc 51 has a valve disc sealing diaphragm 53 on the side facing the first valve seat 44. The valve disc sealing diaphragm 53 on the positive pressure start-up valve disc 51 is used to seal against the outer end edge of the first annular flange 442. The valve disc sealing diaphragm 53 may include a polymer layer and a fluororubber layer, such as a layered structure formed by vulcanizing and bonding PTFE (polytetrafluoroethylene) film and FKM (fluororubber) film. The diameter of the valve disc sealing diaphragm 53 can be a disc-shaped structure of 70mm to 100mm, the thickness of the valve disc sealing diaphragm 53 can be 0.5mm to 1.1mm, preferably 0.9mm, and the hardness can be selected in the range of HR50 to HR75, preferably HR60. The positive pressure leakage of the breather valve body 4 can be effectively reduced by the cooperation between the valve disc sealing diaphragm 53 and the first annular protrusion 442.

[0117] Furthermore, such as Figure 1 and Figure 7 As shown, the outer end of the first annular protrusion 442 is provided with a first sealing tooth cone 443, and the side of the positive pressure start-up valve disc 51 facing the first valve seat 44 is provided with a first toothed groove 512 for engaging with the first sealing tooth cone 443; or the side of the positive pressure start-up valve disc 51 facing the first valve seat 44 is provided with a first sealing tooth cone 443, and the outer end of the first annular protrusion 442 is provided with a first toothed groove 512 for engaging with the first sealing tooth cone 443. The first sealing tooth cone 443 is annular, and the first toothed groove 512 is an annular groove. When the first valve seat 44 contacts the positive pressure start-up valve disc 51, the first sealing tooth cone 443 can press the valve disc sealing diaphragm 53 into the first toothed groove 512 to increase the sealing effect.

[0118] like Figure 1 and Figure 7 As shown, in the embodiment of the present invention, the number of first sealing tooth cones 443 is multi-layered, and the multi-layered first sealing tooth cones 443 are arranged radially at intervals. The number of layers of the first tooth groove 512 corresponds one-to-one with the number of first sealing tooth cones 443. Through the multi-layered sealing structure, the gas leakage of the breather valve body 4 can be effectively reduced.

[0119] like Figure 1 and Figure 7As shown, taking the test data of a breathing valve sample with the above structure as an example, in this breathing valve, the first sealing tooth cone 443 has two layers. The first sealing tooth cone 443 of the radial outer layer is defined as the outer pointed cone, and the inner layer is defined as the inner pointed cone. The height of the inner pointed cone is preferably lower than the height of the outer pointed cone. For example, the height of the outer pointed cone can be 3.2 mm, and the height of the inner pointed cone can be 2.8 mm. The inner angle of the cone peaks of the outer pointed cone and the inner pointed cone is an acute angle (such as 60°). The cone tip is provided with a rounded chamfer. The diameter of the rounded chamfer can be 0.1 to 0.3 mm. The first tooth groove 512 can include a first-level groove located in the inner layer and a second-level groove located in the outer layer. The first-level groove is used to cooperate with the inner pointed cone, and the second-level groove is used to cooperate with the outer pointed cone. The depth of the second-level groove can be equal to the depth of the first-level groove. For example, the depth of both can be 2.8 mm, and the groove widths of the two can be 10 mm and 6 mm, respectively. When the sealing cone mates with the toothed groove, the 0.9mm thick valve disc sealing diaphragm 53 is pressed into the first-stage groove by 0.4mm under the action of the inner cone, and into the second-stage groove by 0.7mm under the action of the outer cone. This forms a highly staggered double-layered high-efficiency seal, effectively reducing breather valve leakage by 99.9999%. Of course, testing has shown that for single-cone breather valves, leakage can be reduced by 95%. Therefore, in some scenarios, the first sealing cone 443 can be used as a single layer.

[0120] In embodiments of the present invention, the diameter difference between the external and internal toothed cones is preferably 14mm to 30mm, and the ring diameter of the internal toothed cone is preferably equal to the interface diameter of the valve port connection end 41 of the breather valve body 4. The height difference between the internal and external toothed cones is 0.1-0.8mm, the inner angle of the tips of the internal and external toothed cones is 45-75°, and the tips of the internal and external toothed cones are provided with rounded corners, the arc diameter of which is 0.1-0.3mm.

[0121] In an embodiment of the present invention, the first toothed groove 512 may be filled with a non-Newtonian fluid buffer material, which can fill the remaining gap when the valve disc sealing diaphragm 53 is pressed into the groove, so as to further increase the sealing effect.

[0122] In an embodiment of the present invention, the waistline of the first toothed groove 512 has an S-shaped transition, and the curvature of the waistline is preferably 1.1-1.2 rad. This design can reduce the pressure of the outer contour of the groove on the diaphragm when the valve disc sealing diaphragm 53 is recessed, thereby reducing diaphragm wear.

[0123] like Figure 1 and Figure 7As shown, in an embodiment of the present invention, the edge of the positive pressure start-up valve disc 51 is further provided with rotors 511. When the positive pressure start-up valve disc 51 blocks the first seat channel 441, the rotors 511 are located outside the first annular convex edge 442. There are multiple rotors 511 along the circumferential direction of the positive pressure start-up valve disc 51, with adjacent rotors staggered. Preferably, the radius of each rotor is 0.3-0.4 rad, the gap between two adjacent rotors is 3-6 mm, and the number of rotors is 15-20. By providing rotors 511, the valve disc can be driven to rotate when the positive pressure start-up valve disc 51 is lifted by air pressure, thereby ensuring uniform force on the positive pressure start-up valve disc 51 in the radial direction.

[0124] like Figure 1 and Figure 7 As shown, in an embodiment of the present invention, in order to achieve precise fit between the sealing tooth cone and the tooth groove, a first guide structure 61 is provided in the positive pressure breathing channel 421 or the breathing valve cavity 43. The first guide structure 61 is used to guide the positive pressure start valve disc 51 to move in the direction of the outlet of the first seat channel 441.

[0125] like Figure 1 and Figure 7 As shown, in an embodiment of the present invention, the first guide structure 61 includes a valve stem positioning sleeve, a first valve stem 513, and a corrosion-resistant rod sleeve. The valve stem positioning sleeve is provided with a first guide channel extending along the depth direction of the first seat channel 441. A plurality of rows of balls 62 are arranged in the first guide channel. The positive pressure start-up valve disc 51 is provided with a first valve stem 513. The first valve stem 513 is covered with a corrosion-resistant rod sleeve. The first valve stem 513 with the corrosion-resistant rod sleeve can extend into the first guide channel and roll in cooperation with the balls 62. The first valve stem 513 is made of stainless steel and is covered with a corrosion-resistant rod sleeve. The corrosion-resistant rod sleeve is preferably made of PEEK composite graphite material and can prevent the medium exhaled from the storage tank from corroding the guide rod. Balls 62 are provided between the PEEK rod sleeve and the inner wall of the rod sleeve. The rollers can be made of ceramic material. The balls 62 can facilitate the axial movement and rotational movement of the first valve stem 513 in the rod sleeve.

[0126] In an embodiment of the present invention, the number of balls is 5-9, and the ball diameter is 2mm-4mm.

[0127] In an embodiment of the present invention, when the first valve stem 513 extends into the valve stem positioning sleeve, the central axis of the first guide channel, the central axis of the positive pressure start-up valve disc 51, and the central axis at the outlet of the first seat channel 441 preferably coincide, so as to reduce the offset torque on the valve disc when it starts to jump and ensure that the valve disc can move smoothly.

[0128] In an embodiment of the present invention, the weight of the positive pressure start valve disc 51 needs to satisfy P1 = 1.27 * Mg / D, where P1 is the positive pressure opening pressure on the nameplate of the breather valve body 4.

[0129] like Figure 1 As shown, in an embodiment of the present invention, the negative pressure breathing channel 422 and the breathing valve chamber 43 are separated by a second valve seat 45. The second valve seat 45 is provided with a second seat channel 451 connecting the negative pressure breathing channel 422 and the breathing valve chamber 43. A negative pressure start-up valve disc 52 is disposed in the breathing valve chamber 43 and positioned opposite the second seat channel 451. The negative pressure start-up valve disc 52 is positioned along the outlet direction of the second seat channel 451 and is used to block the second seat channel 451 from the inside. It should be noted that, with the negative pressure start-up valve disc 52, external gas will be drawn into the breathing valve chamber 43. Therefore, the outlet of the second seat channel 451 is the port of the second seat channel 451 facing the breathing valve chamber 43.

[0130] like Figure 1 As shown, in an embodiment of the present invention, the second valve seat 45 has a protruding second annular flange 452 on the side opposite to the negative pressure breathing channel 422. The end edge of the second annular flange 452 facing the breathing valve cavity 43 is the inner end edge of the second seat channel 451. The negative pressure start valve disc 52 has a valve disc sealing diaphragm 53 on the side facing the second valve seat 45. The valve disc sealing diaphragm 53 on the negative pressure start valve disc 52 is used to seal against the inner end edge of the second annular flange 452.

[0131] like Figure 1 As shown, in an embodiment of the present invention, the outer end of the second annular protrusion 452 is provided with a second sealing tooth cone 453, and the negative pressure start valve disc 52 is provided with a second toothed groove for engaging with the second sealing tooth cone 453 on the side facing the second valve seat 45; or the negative pressure start valve disc 52 is provided with a second sealing tooth cone 453 on the side facing the second valve seat 45, and the outer end of the second annular protrusion 452 is provided with a second toothed groove for engaging with the second sealing tooth cone 453.

[0132] like Figure 1 As shown, in an embodiment of the present invention, a second guide structure is provided in the negative pressure breathing channel 422 or the breathing valve cavity 43. The second guide structure is used to guide the negative pressure start valve disc 52 to move in the direction of the outlet of the second seat channel 451.

[0133] like Figure 1 As shown, in an embodiment of the present invention, the second guide structure includes a hollow rod sleeve and a second valve stem. The hollow rod sleeve is fixedly installed on the channel wall of the negative pressure breathing channel 422 by a cross positioning ring. Several rows of ball bearings 62 are arranged inside the hollow rod sleeve. The negative pressure start valve disc 52 is provided with a second valve stem, which can extend into the hollow rod sleeve and roll in cooperation with the ball bearings.

[0134] In an embodiment of the present invention, when the second valve stem extends into the hollow rod sleeve, the central axis of the hollow rod sleeve, the central axis of the negative pressure start-up valve disc 52, and the central axis of the outlet of the second seat channel coincide.

[0135] Since the cooperation method between the second valve seat 45 and the negative pressure start valve disc 52, and the guiding method between the negative pressure start valve disc 52 and the second guide structure are the same as or similar to those between the first valve seat 44 and the positive pressure start valve disc 51, the beneficial effects of the corresponding structures will not be repeated here.

[0136] like Figure 1 As shown in the embodiment of the present invention, a flame-arresting mesh 63 and a rainproof cover 64 are respectively provided at the outlets of the positive pressure breathing channel 421 and the negative pressure breathing channel 422. The rainproof cover 64 can prevent rainwater from entering the breathing valve body 4, and the flame-arresting mesh 63 can reduce the probability of fire when there is flammable gas in the storage tank.

[0137] In an embodiment of the present invention, the valve port connection end 41 and the breather valve body 4 are connected by an arc-shaped transition. This design facilitates a more uniform flow of gas at the valve port connection end 41.

[0138] Example 3:

[0139] like Figure 8 As shown, in order to achieve the above objectives, the present invention also provides a storage tank assembly, wherein the storage tank assembly includes a breather valve assembly with a sealing inspection structure as described above and a storage tank body 8, and the air outlet of the storage tank body 8 is connected to the port of the valve chamber 1 at the end away from the breather valve body 4.

[0140] 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 air outlet port size of storage tank body. Main body docking seat 12 is used to connect with the air outlet port flange of storage tank body, 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 ends of the valve chamber 1. When the breather valve needs to be inspected, the inspection channel 13 can be opened first, and then the sealing component 2 can be installed in the connecting valve chamber 1 through the inspection channel 13. After the sealing component 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 gas outlet of the storage tank body, thereby isolating the breather valve and the storage tank body from the outside world. This not only provides the necessary sealing environment for the inspection of the breather valve, but also prevents the gas in the storage tank body from affecting the surrounding workers.

[0141] Example 4:

[0142] like Figure 8 As shown, to achieve the above objectives, the present invention also provides a gas supply system 7, which includes a gas source 71, a main inspection pipe 72, and a main gas supply pipe 73. One end of the main inspection pipe 72 is connected to the gas source 71, and the other end is connected to the gas injection pipe 3. The main inspection pipe 72 is provided with a positive pressure inspection branch 721 and a negative pressure inspection branch 722 arranged in parallel. The positive pressure inspection branch 721 and the negative pressure inspection branch 722 are selected by a pipeline selection valve 723. Compared with the positive pressure inspection branch 721, the negative pressure inspection branch 722 is also provided with a negative pressure generator 724. The main inspection pipe 72 is also provided with a flow rate inspection element 725 and a pressure inspection element 726 for inspecting the flow rate and pressure of the two branches respectively. Furthermore, the end of the main inspection pipe 72 connected to the gas injection pipe 3 is also provided with a pressure regulating valve 727. The pressure regulating valve 727 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 727 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.

[0143] In this embodiment of the invention, the main gas supply pipe 73 is mainly used to supply gas to the lifting component 22.

[0144] Example 5:

[0145] like Figure 9 As shown, to illustrate the above structure, the present invention also provides a method for in-situ testing of a breathing valve, the method comprising:

[0146] S100: Provides a tank assembly as described above;

[0147] 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;

[0148] S300: Inject gas into the gas injection line to test the breather valve.

[0149] A breather valve assembly with a sealing inspection structure is installed on the tank body to form the tank assembly. During daily use, the sealing component 2 can be removed from the connecting valve chamber 1, allowing the tank body 8 to communicate with the breather valve body through the connecting valve chamber 1, thus balancing the pressure inside the tank. When the breather valve body 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 22 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 compression 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 72 is connected to the air injection pipe 3, and the main air supply pipe 73 is connected to the cylinder, so that the breather valve inspection test can be carried out.

[0150] like Figure 10 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 pipeline to inspect the breathing valve. Specifically, the steps include:

[0151] 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;

[0152] 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;

[0153] 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;

[0154] Record the current pressure of the positive pressure gas as the positive pressure opening pressure of the breather valve.

[0155] like Figure 11 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 pipeline to inspect the breathing valve. Specifically, the steps include:

[0156] 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;

[0157] 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;

[0158] 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;

[0159] Record the current pressure of the negative pressure gas as the negative pressure opening pressure of the breather valve.

[0160] like Figure 12 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 injection pipeline to inspect the breathing valve include:

[0161] 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;

[0162] 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;

[0163] S323: Collects the flow rate of positive pressure gas after it has stabilized at 0.75 times the initial pressure.

[0164] like Figure 13 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 injection pipeline to inspect the breathing valve include:

[0165] 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;

[0166] 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;

[0167] S333: Collects the flow rate of negative pressure gas after it stabilizes at 0.75 times the initial pressure.

[0168] Using the above method to test the three breather valve assemblies with sealing inspection structures in the embodiments of the present invention, the following data can be obtained:

[0169] Taking a breathing valve assembly A with a sealing test structure and a diameter D of 300 mm for positive pressure breathing channel 421 and negative pressure breathing channel 422 as an example, the breathing valve assembly A with a sealing test structure was tested using the air supply system 7. The positive pressure start-up pressure was measured to be 1350 Pa and the true negative pressure start-up pressure was -300 Pa.

[0170] After measuring the opening pressure, the leakage rate was tested. At a test pressure of 1012 Pa (1350 Pa * 75%), the leakage rate of breather valve assembly A with the sealing test structure was 0 Nml / min. When the leakage rate of breather valve assembly A with the sealing test structure was 1 Nml / min, the test pressure was 1300 Pa, reaching 96% of the opening pressure. At a test pressure of -225 Pa (-300 Pa * 75%), the leakage rate of breather valve assembly A with the sealing test structure was 0 Nml / min. When the leakage rate of breather valve assembly A with the sealing test structure was 1 Nml / min, the test pressure was -290 Pa, reaching 96% of the opening pressure. Its leak-proof performance is far superior to ordinary breather valves on the market.

[0171] Taking the breathing valve assembly B with a sealing test structure and a diameter D of 150 mm for the positive pressure breathing channel 421 and the negative pressure breathing channel 422 as an example, the breathing valve assembly B with the sealing test structure was tested using the air supply system 7. The pressure end opening pressure was measured to be 1750 Pa and the vacuum end opening pressure was -300 Pa.

[0172] After measuring the opening pressure, the leakage rate was tested. Breathing valve assembly A with a sealing test structure had a leakage rate of 0 Nml / min at a test pressure of 1310Pa (1750Pa*75%). Breathing valve assembly B with a sealing test structure had a leakage rate of 1 Nml / min at a test pressure of 1700Pa, reaching 97% of the opening pressure. Breathing valve assembly B with a sealing test structure had a leakage rate of 0 Nml / min at a test pressure of -225Pa (-300Pa*75%). Breathing valve assembly A with a sealing test structure had a leakage rate of 1 Nml / min at a test pressure of -290Pa, reaching 96% of the opening pressure. The leakage prevention performance is far superior to ordinary breathing valves on the market.

[0173] Taking the breathing valve assembly with a sealing test structure and a diameter D of 200 mm for the positive pressure breathing channel 421 and the negative pressure breathing channel 422 as an example, the breathing valve assembly with a sealing test structure was tested using the air supply system 7. The pressure end opening pressure was measured to be 1350 Pa and the vacuum end opening pressure was -300 Pa.

[0174] After measuring the opening pressure, the leakage rate was tested. Breathing valve assembly A with a sealing test structure had a leakage rate of 0 Nml / min at a test pressure of 1012 Pa (1350 Pa * 75%). Breathing valve assembly C with a sealing test structure had a leakage rate of 1 Nml / min at a test pressure of 1700 Pa, reaching 97% of the opening pressure. Breathing valve assembly C with a sealing test structure had a leakage rate of 0 Nml / min at a test pressure of -225 Pa (-300 Pa * 75%). Breathing valve assembly A with a sealing test structure had a leakage rate of 1 Nml / min at a test pressure of -290 Pa, reaching 96% of the opening pressure. The leakage prevention performance is far superior to ordinary breathing valves on the market.

[0175] In summary, the breather valve assembly with sealing inspection structure provided by this invention uses a cylinder to provide the clamping and sealing force required by the sealing component 2, which, together with the diaphragm on the sealing plate, achieves efficient sealing. When the breather valve needs inspection, simply placing the sealing component 2 into the connecting valve chamber 1 creates a separation environment between the tank body and the breather valve, eliminating the need to disassemble the breather valve, thus improving inspection efficiency and reducing inspection costs. Furthermore, the inspection method based on this equipment does not require complex equipment or professional 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, the breather valve body 4 of this invention has multiple layers of seals, and the sealing form of these multiple layers is optimized, giving the breather valve body 4 excellent leak-proof performance. Finally, the arching system provided by this invention is simple to operate, highly adaptable, and well-suited for the inspection of breather valves.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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 breather valve assembly with a sealing inspection structure, characterized in that, The breather valve assembly with a sealing inspection structure includes: The breathing valve body (4) is provided with a valve port connection end (41); A connecting valve chamber (1) is provided on the valve port connecting end (41) and one end of the port is connected to the breathing valve chamber (43) of the breathing valve body (4). The connecting valve chamber (1) has an inspection channel (13) and a pressure-closing door (14) for opening and closing the inspection channel (13) on its chamber wall. A sealing assembly (2) is installed in the connecting valve chamber (1) and includes an upper sealing plate (21) for blocking the valve port connection end (41) from the connecting valve chamber (1) and a lifting member (22) for providing blocking pressure on the upper sealing plate (21). The upper sealing plate (21) is provided with a through air injection pipe (3).

2. The breather valve assembly with a sealing inspection structure according to claim 1, characterized in that, The connecting valve chamber (1) and the valve port connecting end (41) are connected through the valve body docking seat (11). The valve body docking seat (11) is provided with a valve body interface for communicating with the breathing valve chamber (43). The upper sealing plate (21) is used to seal and support the side of the valve body docking seat (11) facing away from the valve port connecting end (41) and block the valve body interface.

3. The breather valve assembly with a sealing inspection structure according to claim 2, characterized in that, The valve body docking seat (11) has a first sinking groove on the side opposite to the valve port connection end (41). The valve body interface is opened on the bottom wall of the first sinking groove. The remaining part of the first sinking groove forms a first boss (111). The upper sealing plate (21) is used to extend into the first sinking groove and seal against the first boss (111).

4. The breather valve assembly with a sealing inspection structure 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 breather valve assembly with a sealing inspection structure 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).

6. The breather valve assembly with a sealing inspection structure according to claim 5, characterized in that, The flexible sealing diaphragm (212) is made of nitrile rubber.

7. The breather valve assembly with a sealing inspection structure according to claim 5, characterized in that, The thickness of the flexible sealing diaphragm (212) is 1.5 to 2.5 mm.

8. The breather valve assembly with a sealing inspection structure according to claim 5, characterized in that, The flexible sealing diaphragm (212) is bonded to the plate body (211) by means of cyanoacrylate material.

9. The breather valve assembly with a sealing inspection structure according to claim 1, characterized in that, The connecting valve chamber (1) is provided with a main body docking seat (12) at one end away from the valve port connecting end (41). 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 one end of the lifting member (22) away from the upper sealing plate (21). The lower sealing plate (23) is used to seal against the main body docking seat (12) and block the main body interface.

10. The breather valve assembly with a sealing inspection structure according to claim 9, characterized in that, The main body docking seat (12) has a second sinking groove on the side facing the valve port connection end (41). The main body interface is opened on the bottom wall of the second sinking groove. The remaining part of the bottom wall of the second sinking groove forms a second boss (121). The lower sealing plate (23) is used to extend into the second sinking groove and abut against the second boss (121).

11. The breather valve assembly with a sealing inspection structure according to claim 10, characterized in that, The main docking seat (12) is also provided with a lower positioning block (18), which is used to support and position the peripheral wall of the lower sealing plate (23) when the lower sealing plate (23) is inserted into the second sinking groove.

12. The breather valve assembly with a sealing inspection structure according to claim 9, characterized in that, The lower sealing plate (23) is also provided with a handle (24).

13. The breather valve assembly with a sealing inspection structure according to claim 9, 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 breather valve assembly with a sealing inspection structure according to claim 13, characterized in that, The breather valve assembly with a sealing inspection structure also includes an air supply mechanism for supplying air to the lifting member (22), the output pressure of which is 0.2 MPa to 0.4 MPa.

15. The breather valve assembly with a sealing inspection structure according to claim 1, characterized in that, The diameter of the gas injection pipe (3) is 5mm to 40mm.

16. The breather valve assembly with a sealing inspection structure according to any one of claims 1 to 15, characterized in that, The breathing valve body (4) is provided with a positive pressure breathing channel (421) and a negative pressure breathing channel (422) that are connected to the outside and the breathing valve cavity (43). The positive pressure breathing channel (421) and the negative pressure breathing channel (422) are respectively blocked by a positive pressure start-up valve disc (51) and a negative pressure start-up valve disc (52). The positive pressure start-up valve disc (51) is used to open when the pressure in the breathing valve cavity (43) is greater than the positive pressure start-up pressure, and the negative pressure start-up valve disc (52) is used to open when the pressure in the breathing valve cavity (43) is less than the negative pressure start-up pressure.

17. The breather valve assembly with a sealing inspection structure according to claim 16, characterized in that, The positive pressure breathing channel (421) and the breathing valve chamber (43) are separated by a first valve seat (44). The first valve seat (44) is provided with a first seat channel (441) connecting the positive pressure breathing channel (421) and the breathing valve chamber (43). The positive pressure start valve disc (51) is disposed in the positive pressure breathing channel (421) and is located in the first seat channel (441). The positive pressure start valve disc (51) is movable along the outlet direction of the first seat channel (441) and is used to block the first seat channel (441) from the outside.

18. The breather valve assembly with a sealing inspection structure according to claim 17, characterized in that, The first valve seat (44) has a protruding first annular flange (442) on its outlet side. The first annular flange (442) surrounds and forms the outlet of the first seat channel (441). The positive pressure start valve disc (51) has a valve disc sealing diaphragm (53) on the side located on the first annular flange (442) and facing the first valve seat (44). The valve disc sealing diaphragm (53) on the positive pressure start valve disc (51) is used to seal against the outer edge of the first annular flange (442).

19. The breather valve assembly with a sealing inspection structure according to claim 18, characterized in that, The valve disc sealing diaphragm (53) comprises a polymer layer and a fluororubber layer.

20. The breather valve assembly with a sealing inspection structure according to claim 19, characterized in that, The polymer layer is made of polytetrafluoroethylene.

21. The breather valve assembly with a sealing inspection structure according to claim 19, characterized in that, The valve disc sealing diaphragm (53) has a thickness of 0.5-1.1 mm and a hardness of HR50-HR75.

22. The breather valve assembly with a sealing inspection structure according to claim 19, characterized in that, The valve disc sealing diaphragm (53) has a disc-shaped structure with a diameter of 70mm to 100mm.

23. The breather valve assembly with a sealing inspection structure according to claim 18, characterized in that, The outer end edge of the first annular protrusion (442) is provided with a first sealing tooth cone (443), and the positive pressure start valve disc (51) facing the first valve seat (44) is provided with a first toothed groove (512) for engaging with the first sealing tooth cone (443); or The positive pressure start valve disc (51) is provided with a first sealing tooth cone (443) on the side facing the first valve seat (44), and the outer end of the first annular convex edge (442) is provided with a first tooth groove (512) for engaging with the first sealing tooth cone (443).

24. The breather valve assembly with a sealing inspection structure according to claim 23, characterized in that, The first sealing tooth cone (443) is arranged in a ring shape and has multiple layers. The multiple layers of the first sealing tooth cone (443) are arranged radially at intervals. The number of layers of the first tooth groove (512) corresponds one-to-one with the number of the first sealing tooth cone (443).

25. The breather valve assembly with a sealing inspection structure according to claim 24, characterized in that, The first sealing tooth cone (443) has two layers and includes an outer tooth cone located on the radially outer side and an inner tooth cone located on the radially inner side. The first tooth groove (512) includes a first-level groove and a second-level groove for engaging with the inner tooth cone and the outer tooth cone, respectively.

26. The breather valve assembly with a sealing inspection structure according to claim 25, characterized in that, The diameter difference between the external tooth cone and the internal tooth cone is 14mm to 30mm, and the ring diameter of the internal tooth cone is equal to the interface diameter of the valve port connection end (41) of the breathing valve body (4).

27. The breather valve assembly with a sealing inspection structure according to claim 25, characterized in that, The height of the internal tooth cone is lower than that of the external tooth cone.

28. The breather valve assembly with a sealing inspection structure according to claim 27, characterized in that, The height difference between the internal tooth cone and the external tooth cone is 0.1-0.8 mm, the inner angle of the tip of the internal tooth cone and the external tooth cone is 45-75°, and the tip of the internal tooth cone and the external tooth cone is provided with a rounded corner, the arc diameter of which is 0.1-0.3 mm.

29. The breather valve assembly with a sealing inspection structure according to claim 25, characterized in that, The waistline of the first-level groove and the second-level groove has an S-shaped transition, and the upper and lower curvatures of the waistline are 1.1-1.2 rad respectively.

30. The breather valve assembly with a sealing inspection structure according to claim 25, characterized in that, The width of the Class II groove is greater than the width of the Class I groove.

31. The breather valve assembly with a sealing inspection structure according to claim 23, characterized in that, The edge of the positive pressure start-up valve disc (51) is also provided with a rotor (511), which is located outside the first annular protrusion (442) when the positive pressure start-up valve disc (51) blocks the first seat channel (441).

32. The breather valve assembly with a sealing inspection structure according to claim 31, characterized in that, Along the circumferential direction of the positive pressure start-up valve disc (51), there are multiple rotors (511), and adjacent rotors are staggered.

33. The breather valve assembly with a sealing inspection structure according to claim 32, characterized in that, The radius of each rotor is 0.3-0.4 rad, the gap between two adjacent rotors is 3-6 mm, and the number of rotors is 15-20.

34. The breather valve assembly with a sealing inspection structure according to claim 17, characterized in that, The positive pressure breathing channel (421) or the breathing valve chamber (43) is provided with a first guide structure (61), which is used to guide the positive pressure start valve disc (51) to move in the direction of the outlet of the first seat channel (441).

35. The breather valve assembly with a sealing inspection structure according to claim 34, characterized in that, The first guide structure (61) includes a valve stem positioning sleeve, a first valve stem, and a corrosion-resistant rod sleeve. The valve stem positioning sleeve is provided with a first guide channel extending along the depth direction of the first seat channel (441). A plurality of rows of balls (62) are arranged in the first guide channel. The first valve stem (513) is disposed on the positive pressure start valve disc (51). The first valve stem (513) is covered with the corrosion-resistant rod sleeve. The first valve stem (513) with the corrosion-resistant rod sleeve can extend into the first guide channel and roll in cooperation with the balls (62).

36. The breather valve assembly with a sealing inspection structure according to claim 35, characterized in that, The number of balls is 5-9, and the particle size of the balls is 2mm-4mm.

37. The breather valve assembly with a sealing inspection structure according to claim 35, characterized in that, When the first valve stem (513) extends into the valve stem positioning sleeve, the central axis of the first guide channel, the central axis of the positive pressure start valve disc (51), and the central axis of the outlet of the first seat channel (441) coincide.

38. The breather valve assembly with a sealing inspection structure according to claim 35, characterized in that, The valve stem positioning sleeve is fixedly installed on the channel wall of the positive pressure breathing channel (421) by a fixing cross ring.

39. The breather valve assembly with a sealing inspection structure according to claim 16, characterized in that, The negative pressure breathing channel (422) and the breathing valve chamber (43) are separated by a second valve seat (45). The second valve seat (45) is provided with a second seat channel (451) connecting the negative pressure breathing channel (422) and the breathing valve chamber (43). The negative pressure start valve disc (52) is disposed in the breathing valve chamber (43) and located in the second seat channel (451). The negative pressure start valve disc (52) is movable along the outlet direction of the second seat channel (451) and is used to block the second seat channel (451) from the inside.

40. The breather valve assembly with a sealing inspection structure according to claim 39, characterized in that, The outlet side of the second valve seat (45) is provided with a protruding second annular flange (452), which surrounds and forms the outlet of the second seat channel (451). The negative pressure start valve disc (52) is disposed in the breathing valve cavity (43) and is positioned on the second annular flange (452). The negative pressure start valve disc (52) is provided with a valve disc sealing diaphragm (53) on the side facing the second valve seat (45). The valve disc sealing diaphragm (53) on the negative pressure start valve disc (52) is used to seal against the inner edge of the second annular flange (452).

41. The breather valve assembly with a sealing inspection structure according to claim 40, characterized in that, The outer end of the second annular protrusion (452) is provided with a second sealing tooth cone (453), and the negative pressure start valve disc (52) facing the second valve seat (45) is provided with a second toothed groove for engaging with the second sealing tooth cone (453); or The negative pressure start valve disc (52) is provided with a second sealing tooth cone (453) on the side facing the second valve seat (45), and the outer end of the second annular convex edge (452) is provided with a second tooth groove for engaging with the second sealing tooth cone (453).

42. The breather valve assembly with a sealing inspection structure according to claim 41, characterized in that, The negative pressure breathing channel (422) or the breathing valve chamber (43) is provided with a second guide structure, which is used to guide the negative pressure start valve disc (52) to move in the direction of the outlet of the second seat channel (451).

43. The breather valve assembly with a sealing inspection structure according to claim 42, characterized in that, The second guide structure includes a hollow rod sleeve and a second valve stem. The hollow rod sleeve is fixedly installed on the channel wall of the negative pressure breathing channel (422) by a cross positioning ring. Several rows of ball bearings (62) are arranged inside the hollow rod sleeve. The second valve stem is set on the negative pressure start valve disc (52). The second valve stem can extend into the hollow rod sleeve and roll in cooperation with the ball bearings.

44. The breather valve assembly with a sealing inspection structure according to claim 43, characterized in that, When the second valve stem extends into the hollow rod sleeve, the central axis of the hollow rod sleeve, the central axis of the negative pressure start valve disc (52), and the central axis of the outlet of the second seat channel coincide.

45. The breather valve assembly with a sealing inspection structure according to claim 39, characterized in that, The positive pressure breathing channel (421) and the negative pressure breathing channel (422) are respectively provided with fire-resistant mesh (63) and rainproof cover (64).

46. ​​The breather valve assembly with a sealing inspection structure according to any one of claims 1 to 15, characterized in that, The valve port connection end (41) and the breathing valve body (4) are connected by an arc-shaped transition.

47. A storage tank assembly, characterized in that, Including the breather valve assembly with a sealing test structure according to any one of claims 1 to 46; and The storage tank body (8) has its air outlet connected to the port of the connecting valve chamber (1) at the end away from the breathing valve body (4).

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