A constant pressure, air-tight storage device

Abstract

The application discloses a constant-pressure airtight storage device, which comprises a cabinet body, a first protection mechanism and a second protection mechanism. The first protection mechanism comprises an air bag body, the bottom of the air bag body is provided with a plurality of pressure balance working air pipes which are communicated with the cabinet body, and the cabinet body is provided with an air pump which is communicated with the pressure balance working air pipes. The second protection mechanism comprises a high-pressure pressure switch, a low-pressure pressure switch, a high-pressure electromagnetic valve and a low-pressure electromagnetic valve. The high-pressure pressure switch is electrically connected with the high-pressure electromagnetic valve, the low-pressure pressure switch is electrically connected with the low-pressure electromagnetic valve, and the high-pressure electromagnetic valve and the low-pressure electromagnetic valve are both communicated with the cabinet body. The air bag body releases and pre-stores gas through the pressure balance working air pipes, absorbs or supplements the air pressure in the cabinet, forms the first air bag balance protection of the air pressure of the cabinet body, the high-pressure electromagnetic valve directly discharges air to the outside world, rapidly reduces the pressure, the low-pressure electromagnetic valve inhales air from the outside world, avoids the negative pressure harm, and forms the second protection of the air pressure balance of the cabinet body.

Description

Technical Field

[0001] This application relates to the technical field of airtight cabinets, and in particular to a constant-pressure airtight storage device. Background Technology

[0002] Cabinets or boxes are widely used in many fields such as industrial production, protection of power electronic equipment, preservation of cultural relics and books, and storage of medicines. Cabinets or boxes are not only used in homes to store and protect various equipment, instruments, cultural relics, books, medicines, etc., but their performance also has an important impact on the normal condition and service life of the stored items, especially in terms of airtightness and constant pressure.

[0003] Airtight cabinets typically require a dry gas environment inside. Good airtightness prevents dust, moisture, and corrosive gases from entering the cabinet and damaging stored items such as artifacts, books, and medicines. Constant pressure function, on the other hand, avoids adverse effects on the cabinet structure and internal items due to pressure imbalances, ensuring the stability of the items.

[0004] To ensure the airtightness of the cabinet, full welding or application of sealant is usually used at the joints. The adhesive and filling properties of the sealant reduce gaps and prevent gas leakage. In terms of internal pressure balance, one-way valves were previously used. When the internal pressure is higher than the external pressure, gas is discharged, and when the internal pressure is lower than the external pressure, gas is allowed to enter. This alleviates the pressure imbalance to some extent. However, one-way valves have weak pressure balance adjustment capabilities and cannot cope with drastic pressure fluctuations caused by large temperature changes. They cannot guarantee that the internal pressure is basically the same as the external pressure, which may damage the cabinet and the internal equipment or items. Summary of the Invention

[0005] To stably regulate the air pressure balance inside and outside the airtight cabinet, a constant-pressure airtight storage device is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A constant-pressure airtight storage device includes a cabinet, a primary protection mechanism and a secondary protection mechanism. The primary protection mechanism includes an airbag body, the bottom of which is provided with several pressure-balancing working air pipes connected to the cabinet body. The cabinet body is provided with an air pump connected to the pressure-balancing working air pipes, forming a pressure-balancing primary protection.

[0008] The secondary protection mechanism includes a high-pressure switch, a low-pressure switch, a high-pressure solenoid valve, and a low-pressure solenoid valve. The high-pressure switch is electrically connected to the high-pressure solenoid valve, and the low-pressure switch is electrically connected to the low-pressure solenoid valve. Both the high-pressure solenoid valve and the low-pressure solenoid valve are connected to the cabinet, forming a pressure-balanced secondary protection.

[0009] By adopting the above technical solution, the airbag body is connected to the cabinet. When the temperature rises and the gas inside the cabinet expands, the excess gas pressure enters the airbag body for storage through the pressure balancing working air pipe, preventing a sudden increase in gas pressure. When the temperature drops and the gas inside the cabinet contracts, the airbag body releases the pre-stored gas through the pressure balancing working air pipe to replenish the gas pressure inside the cabinet, forming the first-level airbag balance protection for the cabinet's gas pressure. When the airbag body's adjustment capacity is insufficient, the high-pressure switch or low-pressure switch is set to activate the corresponding electrically connected high-pressure solenoid valve or low-pressure solenoid valve. The high-pressure solenoid valve directly exhausts gas to the outside, quickly reducing the pressure, while the low-pressure solenoid valve draws in air from the outside, avoiding the hazards of negative pressure, forming the second-level protection for the cabinet's gas pressure balance.

[0010] Preferably, it also includes a three-level protection mechanism, which includes a high-pressure mechanical pressure relief valve and a low-pressure mechanical pressure relief valve. The high-pressure mechanical pressure relief valve is connected to the cabinet body, and the low-pressure mechanical pressure relief valve is installed in reverse in the cabinet body and connected to the instrument box, forming a pressure-balanced three-level protection.

[0011] By adopting the above technical solution, to prevent adverse effects caused by the failure of pressure switches or solenoid valves in the secondary protection, mechanical pressure relief valves for outward and inward exhaust are installed. When the positive pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve for outward exhaust, the high-pressure mechanical pressure relief valve operates, discharging excess gas to maintain the original pressure outside the cabinet; when the negative pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve for inward exhaust, the low-pressure mechanical pressure relief valve operates, drawing in gas that is insufficient to maintain the original pressure inside the cabinet; thus forming a three-level protection system for cabinet pressure balance.

[0012] Preferably, the top of the cabinet is provided with an airbag enclosure panel that surrounds the outer periphery of the airbag body, and an airbag pull rope is provided between the top of the airbag enclosure panel and the top of the airbag body to connect the two.

[0013] By adopting the above technical solution, the airbag enclosure provides a dedicated protective space for the airbag body to prevent external physical damage. The airbag pull straps, through precise length control, ensure that the initial position of the airbag body after closing is always in the middle position between minimum contraction and maximum expansion. The restraining effect of the airbag pull straps can prevent the airbag from being over-compressed, ensuring that it always has effective gas regulation capabilities, avoiding airbag collapse due to excessive looseness or excessive tightness that restricts expansion space, and ensuring the stability and reliability of air pressure regulation.

[0014] Preferably, it also includes an instrument box, wherein a cable management hole is provided between the instrument box and the cabinet to connect the two, and an airtight plug is provided at the cable management hole.

[0015] By adopting the above technical solution, the wires and signal lines running through the inside and outside of the cabinet pass through the cabinet through the airtight plug. This not only meets the wiring connection requirements between the instrument box and the cabinet, but also eliminates the risk of gas leakage and dust intrusion through the airtight plug, ensuring that the overall airtightness of the cabinet is not affected by the cable running through it.

[0016] Preferably, it also includes an instrument box, which is equipped with a differential pressure gauge and a pressure gauge, and the ends of the differential pressure gauge and the pressure gauge are connected to the cabinet body.

[0017] By adopting the above technical solution, the differential pressure gauge can measure the air pressure difference between the inside and outside of the cabinet, and the pressure gauge can measure the air pressure inside the cabinet. The differential pressure gauge and the pressure gauge provide real-time air pressure monitoring function, allowing operators to intuitively grasp the air pressure status inside and outside the cabinet and make timely adjustments or maintenance.

[0018] Preferably, both the low-pressure solenoid valve and the low-pressure mechanical pressure relief valve are provided with an air inlet pipe at one end inside the instrument box, and a dustproof mesh cover is provided at the air inlet pipe.

[0019] By adopting the above technical solution, the dustproof mesh cover at the air intake pipe effectively blocks large external particles from entering the cabinet, protecting precision components such as solenoid valves and pressure relief valves from contamination and preventing impurities from damaging the items stored inside the cabinet.

[0020] Preferably, the dustproof mesh cover is equipped with dust-absorbing cotton.

[0021] By adopting the above technical solution, the addition of the dust-absorbing cotton enhances the filtration effect of the dustproof mesh cover, which can adsorb tiny particles and suspended matter, and is especially suitable for scenarios with high cleanliness requirements, ensuring long-term effective dustproof performance.

[0022] Preferably, the structure of the cabinet is suitable for storage cabinets or storage boxes.

[0023] By adopting the above technical solutions, the core air pressure balance mechanism (airbag, solenoid valve, mechanical pressure relief valve) remains consistent regardless of size or number of doors, ensuring that storage devices of different shapes can achieve constant pressure function.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The airbag body is connected to the cabinet through a pressure balancing working air pipe. When the temperature rises, the gas inside the cabinet expands, and the excess gas pressure enters the airbag body for storage through the pressure balancing working air pipe to prevent a sudden increase in gas pressure. When the temperature drops, the gas inside the cabinet contracts, and the airbag body releases the pre-stored gas through the pressure balancing working air pipe to replenish the gas pressure inside the cabinet, forming a primary airbag balance protection for the cabinet's gas pressure.

[0026] 2. When the airbag body's adjustment capacity is insufficient, the high-pressure solenoid valve or the low-pressure solenoid valve is activated by the set high-pressure switch or low-pressure switch. The high-pressure solenoid valve directly exhausts air to the outside to quickly reduce the pressure, while the low-pressure solenoid valve draws air from the outside to avoid the harm of negative pressure, forming a two-stage solenoid valve protection for cabinet air pressure balance.

[0027] 3. When the positive pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve that exhausts outward, the high-pressure mechanical pressure relief valve operates, discharging excess gas to maintain the original pressure outside the cabinet; when the negative pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve that exhausts inward, the low-pressure mechanical pressure relief valve operates, drawing in gas that is insufficient to maintain the original pressure inside the cabinet, thus forming a three-stage pressure relief valve protection system for balancing the air pressure inside the cabinet. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a constant-pressure airtight storage device.

[0029] Figure 2 A schematic diagram of an explosion at a primary protection facility;

[0030] Figure 3 This is a sectional view of the primary protection mechanism and instrument box on the cabinet.

[0031] Figure 4 This is an exploded view of the instrument box on the cabinet.

[0032] Attached reference numerals: 1. Cabinet; 2. Primary protection mechanism; 21. Airbag enclosure; 22. Placement space; 23. Airbag pull strap; 24. Airbag body; 25. Pressure balancing working air pipe; 26. Air pump; 3. Secondary protection mechanism; 31. High-pressure switch; 32. Low-pressure switch; 33. High-pressure solenoid valve; 34. Low-pressure solenoid valve; 4. Tertiary protection mechanism; 41. High-pressure mechanical pressure relief valve; 42. Low-pressure mechanical pressure relief valve; 5. Instrument box; 51. Cable management hole; 52. Airtight plug; 53. Differential pressure gauge; 54. Pressure gauge; 6. Air inlet pipe; 7. Dustproof mesh cover; 71. Dust-absorbing cotton. Detailed Implementation

[0033] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0034] As attached Figure 1As shown, a constant pressure airtight storage device includes a cabinet 1, which is assembled from several sheet metal parts. All the joints of the sheet metal parts of the cabinet 1 are fully welded. The structure of the cabinet 1 is suitable for storage cabinets or storage boxes. Regardless of the size or number of doors, the core air pressure balance mechanism remains consistent, ensuring that storage devices of different shapes can achieve constant pressure function.

[0035] As attached Figure 2 and attached Figure 3 As shown, a primary protection mechanism 2 is provided on the top of the cabinet 1. The primary protection mechanism 2 includes an airbag enclosure 21 and an airbag body 24. The airbag enclosure 21 is plate-shaped and is fixed to the top of the cabinet 1 by welding screws. There are four airbag enclosures 21 here. The four airbag enclosures 21 surround and fix each other to form a placement space 22. The airbag body 24 is made of elastic material and is installed in the placement space 22. The volume of the airbag body 24 is slightly smaller than the placement space 22. The airbag enclosure 21 can limit the outer periphery of the airbag body 24. The airbag body 24 is usually made of rubber material with good elasticity and sealing performance, and can expand or pop up according to the change of internal gas volume.

[0036] The bottom of the airbag body 24 is fixedly connected to a pressure balancing working air pipe 25. There are two pressure balancing working air pipes 25. The airbag body 24 is connected to the inside of the cabinet 1 through the pressure balancing working air pipes 25. An air pump 26 is fixed on the inner wall of the top of the cabinet 1. One end of the air pump 26 is connected to one of the pressure balancing working air pipes 25, and the other end of the air pump 26 is connected to the inside of the cabinet 1. The function of the air pump 26 is to assist the circulation of gas between the cabinet 1 and the airbag body 24. When the temperature rises and the gas inside the cabinet expands, the excess gas pressure enters the airbag body 24 through the pressure balancing working air pipe 25 for storage, preventing a sudden rise in gas pressure. When the temperature drops and the gas inside the cabinet contracts, the airbag body 24 releases the pre-stored gas through the pressure balancing working air pipe 25 to replenish the gas pressure inside the cabinet, forming a primary airbag balance protection for the gas pressure of the cabinet 1.

[0037] An airbag pull cord 23 is provided between the top of the airbag enclosure 21 and the top of the airbag body 24 to connect the two. The airbag pull cord 23 is made of elastic material. By precisely controlling the length of the airbag pull cord 23, it is ensured that the airbag body 24 is always in the middle position between the minimum contraction and the maximum expansion after the door is closed. The restraining effect of the airbag pull cord 23 can prevent the airbag body 24 from being over-compressed, ensuring that it always has effective gas regulation capability, and preventing the airbag body 24 from collapsing due to excessive looseness or being overly tight to restrict the expansion space.

[0038] As attached Figure 3 and attached Figure 4As shown, an instrument box 5 is also installed on the top of the cabinet 1. The instrument box 5 is fixed to the top of the cabinet 1 by welding screws, which reduces additional openings and ensures the airtightness of the cabinet 1. The instrument box 5 is equipped with a secondary protection mechanism 3 and a tertiary protection mechanism 4.

[0039] The secondary protection mechanism 3 includes a high-pressure switch 31, a low-pressure switch 32, a high-pressure solenoid valve 33, and a low-pressure solenoid valve 34. The high-pressure switch 31 and the low-pressure switch 32 are electrical control components. The high-pressure switch 31 and the low-pressure switch 32 are symmetrically arranged. The high-pressure switch 31 is electrically connected to the high-pressure solenoid valve 33, and the low-pressure switch 32 is electrically connected to the low-pressure solenoid valve 34. When the high-pressure switch 31 or the low-pressure switch 32 detects that the internal air pressure of the cabinet 1 has reached the set value, it will trigger the corresponding solenoid valve to act.

[0040] High-pressure solenoid valve 33 and low-pressure solenoid valve 34 are symmetrically arranged. Both high-pressure solenoid valve 33 and low-pressure solenoid valve 34 are connected to the inside of cabinet 1. High-pressure solenoid valve 33 and low-pressure solenoid valve 34 are generally electromagnetically controlled valves. When the adjustment capacity of airbag body 24 is insufficient, the high-pressure switch 31 or low-pressure switch 32 is set to activate the corresponding electrically connected high-pressure solenoid valve 33 or low-pressure solenoid valve 34 respectively. High-pressure solenoid valve 33 directly exhausts air to the outside, quickly reducing pressure, while low-pressure solenoid valve 34 draws air from the outside to avoid the harm of negative pressure, forming a secondary protection of air pressure balance in cabinet 1.

[0041] The three-level protection mechanism 4 includes a high-pressure mechanical pressure relief valve 41 and a low-pressure mechanical pressure relief valve 42. The high-pressure mechanical pressure relief valve 41 and the low-pressure mechanical pressure relief valve 42 are mechanical valves. The high-pressure mechanical pressure relief valve 41 is located inside the instrument box 5 and is connected to the cabinet 1. When the air pressure inside the cabinet 1 is too high, the high-pressure mechanical pressure relief valve 41 promptly discharges gas. The low-pressure mechanical pressure relief valve 42 is installed upside down on the inner wall of the top of the cabinet 1 and is connected to the instrument box 5. When the air pressure inside the cabinet 1 is too low, it draws in gas from the outside. The high-pressure mechanical pressure relief valve 41 and the low-pressure mechanical pressure relief valve 42 serve as the three-level protection for the air pressure balance of the cabinet 1.

[0042] Users can choose a single protection mechanism (such as only level 1 airbag protection) or a combination of multiple protection levels (such as level 1 + level 2, level 1 + level 3, or all three levels) according to their actual needs. This is suitable for application environments with different requirements for air pressure stability (such as ordinary warehousing, precision instrument preservation, or extreme temperature change scenarios). For non-strict environments (such as ordinary storage), only the lower-cost level 1 airbag protection can be used. For high-value items (such as cultural relics and medicines), multiple protection levels can be enabled to ensure redundant safety.

[0043] Both the low-pressure solenoid valve 34 and the low-pressure mechanical relief valve 42 are equipped with an air inlet pipe 6 at one end of the instrument box 5. A dustproof mesh cover 7 is installed at the air inlet pipe 6. The dustproof mesh cover 7 is square and has through mesh openings around its perimeter. The dustproof mesh cover 7 can prevent larger dust particles from entering the low-pressure solenoid valve or the low-pressure mechanical relief valve 42 from the air inlet pipe 6.

[0044] The dustproof mesh cover 7 is also equipped with a dust-absorbing cotton 71. The dust-absorbing cotton 71 is square and fits against the inner wall of the dustproof mesh cover 7. The dust-absorbing cotton 71 can be made of carbon fiber cotton, which has good dust-absorbing performance. The combination of the dustproof mesh cover 7 and the dust-absorbing cotton 71 can further filter the air entering the cabinet 1 and prevent dust and impurities from damaging the equipment and items inside the cabinet 1.

[0045] The instrument box 5 has a cable management hole 51 that connects to the interior of the cabinet 1. An airtight plug 52 is installed at the cable management hole 51. All wires and signal lines inside and outside the cabinet 1 are passed into the cabinet 1 through the airtight plug 52. The airtight plug 52 not only meets the wiring connection requirements between the instrument box 5 and the cabinet 1, but also eliminates the risk of gas leakage and dust intrusion, ensuring that the overall airtightness of the cabinet 1 is not affected by the cable passage.

[0046] The instrument box 5 is also equipped with a differential pressure gauge 53 and a pressure gauge 54. The ends of the differential pressure gauge 53 and the pressure gauge 54 are connected to the inside of the cabinet 1. The differential pressure gauge 53 can display the difference between the air pressure inside the cabinet 1 and the outside air pressure, while the pressure gauge 54 displays the actual air pressure inside the cabinet 1. Both the differential pressure gauge 53 and the pressure gauge 54 are connected to the inside of the cabinet 1 through connecting pipes. The differential pressure gauge 53 and the pressure gauge 54 are used to monitor the air pressure inside the cabinet 1 in real time. The operator can intuitively grasp the air pressure status inside and outside the cabinet 1 and make timely adjustments or maintenance.

[0047] The implementation principle of this embodiment is as follows:

[0048] When the temperature inside the cabinet rises and causes the gas to expand, the excess gas pressure enters the airbag body 24 through the pressure balancing working air pipe 25 for storage, preventing a sudden increase in gas pressure. When the temperature inside the cabinet drops and causes the gas to contract, the airbag body 24 releases the pre-stored gas through the pressure balancing working air pipe 25 to replenish the gas pressure inside the cabinet, forming a first-level airbag balance protection for the air pressure of the cabinet 1.

[0049] When the airbag body 24 has insufficient adjustment capacity, the high-pressure solenoid valve 33 or the low-pressure solenoid valve 34 is activated by the high-pressure switch 31 or the low-pressure switch 32. The high-pressure solenoid valve 33 directly exhausts air to the outside, quickly reducing the pressure, while the low-pressure solenoid valve 34 draws air from the outside to avoid the harm of negative pressure, forming a two-stage solenoid valve protection for air pressure balance of cabinet 1.

[0050] When the positive pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve that exhausts outward, the high-pressure mechanical pressure relief valve 41 operates, discharging excess gas to the outside of the cabinet 1 to maintain the original pressure; when the negative pressure inside the cabinet exceeds the preset value of the mechanical pressure relief valve that exhausts inward, the low-pressure mechanical pressure relief valve 42 operates, drawing in gas that is lacking to maintain the original pressure into the cabinet 1 to maintain the original pressure, thus forming a three-stage pressure relief valve protection system for balancing the air pressure in the cabinet 1.

[0051] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A constant-pressure airtight storage device, comprising a cabinet (1), characterized in that, It also includes a primary protection mechanism (2) and a secondary protection mechanism (3). The primary protection mechanism (2) includes an airbag body (24). The bottom of the airbag body (24) is provided with several pressure-balancing working air pipes (25) connected to the cabinet (1). The cabinet (1) is provided with an air pump (26) connected to the pressure-balancing working air pipes (25), forming a pressure-balancing primary protection. The secondary protection mechanism (3) includes a high-pressure switch (31), a low-pressure switch (32), a high-pressure solenoid valve (33), and a low-pressure solenoid valve (34). The high-pressure switch (31) is electrically connected to the high-pressure solenoid valve (33), and the low-pressure switch (32) is electrically connected to the low-pressure solenoid valve (34). Both the high-pressure solenoid valve (33) and the low-pressure solenoid valve (34) are connected to the cabinet (1) to form a pressure-balanced secondary protection.

2. The constant-pressure airtight storage device according to claim 1, characterized in that, It also includes a three-level protection mechanism (4), which includes a high-pressure mechanical pressure relief valve (41) and a low-pressure mechanical pressure relief valve (42). The high-pressure mechanical pressure relief valve (41) is connected to the cabinet (1), and the low-pressure mechanical pressure relief valve (42) is installed in reverse in the cabinet (1) and connected to the instrument box (5), forming a pressure-balanced three-level protection.

3. The constant-pressure airtight storage device according to claim 1, characterized in that, The cabinet (1) has an airbag enclosure (21) on top that surrounds the airbag body (24), and an airbag pull rope (23) connecting the top of the airbag enclosure (21) and the top of the airbag body (24).

4. The constant-pressure airtight storage device according to claim 1, characterized in that, It also includes an instrument box (5), which has a cable tray (51) connecting the two parts, and an airtight plug (52) is provided at the cable tray (51).

5. A constant-pressure airtight storage device according to claim 1, characterized in that, It also includes an instrument box (5), which is equipped with a differential pressure gauge (53) and a pressure gauge (54), and the ends of the differential pressure gauge (53) and the pressure gauge (54) are connected to the cabinet (1).

6. A constant-pressure airtight storage device according to claim 2, characterized in that, The low-pressure solenoid valve (34) and the low-pressure mechanical pressure relief valve (42) are both provided with an air inlet pipe (6) at one end inside the instrument box (5), and a dustproof mesh cover (7) is provided at the air inlet pipe (6).

7. A constant-pressure airtight storage device according to claim 6, characterized in that, The dustproof mesh cover (7) is equipped with a dust-absorbing cotton (71).

8. The constant-pressure airtight storage device according to claim 1, characterized in that, The structure of the cabinet (1) is suitable for storage cabinets or storage boxes.

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