Airtight ring main unit with modularized stainless steel box body

Abstract

The invention relates to the technical field of ring main units, and discloses a modularized stainless steel box airtight ring main unit which comprises a cabinet body, an elastic strip is slidably clamped to the left wall of the front end of the cabinet body, a cabinet door is movably hinged to the elastic strip, and an abutting plate is fixedly connected to the inner side of the cabinet door. The inner wall of the port of the cabinet body is provided with a sealing gap corresponding to the periphery of the abutting plate, the edge of the abutting plate is fixedly connected with a main sealing ring, and the inner wall of the cabinet door is slidably connected with an enclosure frame movably abutting against the periphery of the abutting plate. When the cabinet door is opened, the enclosure frame is matched with the abutting plate to surround and seal the main sealing ring, various impurities in air and caused by operation are effectively prevented from being attached to the surface of the main sealing ring, and after the cabinet door is closed, floating dust in a sealing gap is cleaned through the air drying assembly, and the sealing end face is dried; and the adjusting assembly is matched to drive the main sealing ring to be exposed and then extrude the main sealing ring to be uniformly deformed and attached to the inner wall of the port of the cabinet body, so that the main sealing ring is cleaned and protected, and the sealing performance is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ring main units, and particularly relates to a modular stainless steel box airtight ring main unit. BACKGROUND

[0002] The airtight ring main unit is a compact high-voltage switchgear applied to a power distribution network (especially a 10 kV and below medium-voltage power distribution system), and the core feature is that key electrical components such as circuit breakers, load switches, disconnectors and transformers are integrally sealed in an airtight metal shell made of stainless steel or aluminum alloy, and dry sulfur hexafluoride gas or nitrogen gas is filled as insulation and arc extinguishing medium. The design follows the concept of "full sealing, maintenance-free and miniaturization", and is widely used in urban power grid upgrading, new energy access and user-side power distribution systems.

[0003] The application patent with the publication number CN120237557A discloses an environment-friendly gas ring main unit sealing structure and relates to the technical field of ring main units. The environment-friendly gas ring main unit sealing structure comprises a cabinet door structure, and the cabinet door structure comprises a cabinet door frame body and a cabinet door panel. The cabinet door frame body is provided with a folded sealing pipe in the circumferential direction. The folded sealing pipe is corrugated. At least two telescopic outer pipes are arranged at one end of the folded sealing pipe. A rotating pin is slidably connected in the telescopic outer pipe. The rotating pin is rotatably connected with a hinge at one end of the telescopic outer pipe. The hinge is connected with the cabinet door panel. A locking mechanism is arranged between the telescopic outer pipe and the rotating pin to fix them. A plurality of magnetic pieces are arranged on the surface of the cabinet door panel facing the cabinet door frame body. An abutting piece is arranged on the surface of the folded sealing pipe away from the cabinet door frame body. A clearance groove is arranged on the surface of the abutting piece for the magnetic pieces to enter. The magnetic pieces are magnetically attracted to the inner wall of the clearance groove. The environment-friendly gas ring main unit sealing structure has the effects of improving the sealing performance of the environment-friendly gas ring main unit and reducing the probability of leakage of the environment-friendly gas.

[0004] In the environment-friendly gas ring main unit sealing structure in the above patent, the cabinet door needs to be opened during the initial installation of electrical components and subsequent maintenance. The folded sealing pipe and other related sealing components used for sealing and the end surface in sealing contact are directly exposed when the cabinet door is opened. Therefore, the sealing components and the sealing end surface are easily contaminated with dust and other impurities in the air, and impurities caused by operation and contact. In addition, when the external humidity is high, water vapor may appear on the relative contact surface of the sealing component and the sealing end surface. These factors may damage the adhesion of the sealing surface, cause corrosion or aging of the sealing component, shorten the service life of the sealing component, reduce the sealing strength, and cause leakage of the gas medium filled in the cabinet body. SUMMARY

[0005] The modular stainless steel box airtight ring network cabinet provided by the application can solve the problem that the sealing performance of the general airtight ring network cabinet is reduced due to the direct exposure of the sealing element and the sealing end face when the cabinet door is opened.

[0006] In order to achieve the above-mentioned purpose, the application specifically adopts the following technical scheme: The modular stainless steel box airtight ring network cabinet comprises a cabinet body, a cabinet door is movably hinged to the elastic strip, a stop plate is fixedly connected to the inner side of the cabinet door, the inner wall of the cabinet port has a sealing gap corresponding to the outer periphery of the stop plate, a main sealing ring is fixedly connected to the edge of the stop plate, a surrounding frame is movably connected to the inner wall of the cabinet door and movably abuts against the outer periphery of the stop plate, a pressing frame is movably connected to the inner wall of the surrounding frame and movably abuts against the main sealing ring, a clamping column is fixedly connected to the right wall of the front end of the cabinet body, an elastic locking block corresponding to the clamping column is movably connected to the middle of the right wall of the cabinet door, and an adjusting assembly is arranged on the front wall of the cabinet door and used to drive the main sealing ring to be exposed and then extruded and drive the elastic locking block to be unlocked. The bottom of the surrounding frame is fixedly connected with a partition plate capable of being inserted into the sealing gap, the inner wall of the bottom of the sealing gap is provided with a partition block, the bottom of the cabinet door has a cavity, and a wind-drying assembly for cleaning and drying floating dust in the sealing gap is arranged in the cavity.

[0007] Further, the middle of the stop plate protrudes towards one side of the cabinet door, and the front wall around the stop plate is provided with a convex column part connected with the cabinet door, the inner side of the cabinet port has an inner edge corresponding to the stop plate, the front wall of the inner edge is provided with an inner sealing gasket, and the front wall of the cabinet body is provided with an outer sealing gasket.

[0008] Further, the edge of the main sealing ring does not exceed the edge of the stop plate, one side of the main sealing ring towards the cabinet door is inclined, the main sealing ring and the sealing gap around the main sealing ring are provided with matching round corners, and the surrounding frame around the pressing frame is also provided with round corners, and the outer wall of the stop plate is movably connected with the pressing frame.

[0009] Further, the adjusting assembly comprises outer guide grooves arranged on the left and right side walls of the surrounding frame, inner guide grooves arranged on the left and right side walls of the pressing frame, a pin frame movably connected between the outer guide grooves and the inner guide grooves, pin rods arranged at the left and right ends of the pin frame, the pin rods being movably connected with the inner walls of the two sides of the cabinet door, an adjusting disc rotatably connected with the inner wall of the cabinet door, a pin convex provided on the inner wall of the adjusting disc and movably connected with the pin frame, and a crank fixedly connected to the middle of the adjusting disc and penetrating through the cabinet door.

[0010] Further, the outer guide groove is composed of outer vertical groove one, outer inclined groove and outer vertical groove two from top to bottom, and the inner guide groove is composed of inner vertical groove and inner inclined groove from top to bottom, the outer inclined groove is inclined backward and the inner inclined groove is inclined forward, the height of the upper and lower ends of the outer guide groove and the inner guide groove is the same, and the height of the upper and lower ends of the outer vertical groove two and the inner inclined groove is the same.

[0011] Further, two circumferentially arranged limiting grooves are formed in the left side of the front wall of the cabinet door, and a spring column movably connected with the upper limiting groove is slidably connected to the side away from the shaft center of the front end of the crank.

[0012] Further, the cabinet door right wall has a locking cavity, the spring lock block is located in the right wall of the locking cavity, the rear wall of the locking cavity has a through hole matched with the clamping column, the right wall of the clamping column has a clamping hole capable of being clamped with the spring lock block, the left rear side of the spring lock block has an inclined surface one, and the lower wall of the spring lock block has a wedge groove including an inclined surface two, the pin rod of the right end of the pin frame is inserted into the locking cavity, and the upper end of the pin rod is fixedly connected with a top rod movably abutting against the inclined surface two.

[0013] Further, the front wall of the cabinet door is integrally formed with a handle, the rear side of the handle has a movable cavity, a U-shaped spring clamping frame is slidably connected in the movable cavity, the left end of the spring clamping frame is inserted into the adjusting disc, the front wall has a corresponding locking groove, and the right end of the spring clamping frame is inserted into the locking cavity opposite to the clamping column.

[0014] Further, the air drying assembly comprises a return air pipe and a supply air pipe fixedly inserted into the rear wall of the cavity and capable of being communicated with the sealing gap, the rear side ports of the return air pipe and the supply air pipe are respectively close to the two sides of the partition plate and are both provided with electromagnetic valves, a touch block electrically feedback controlling the opening of the electromagnetic valves is installed on the rear wall of the movable cavity, a miniature fan is fixedly connected to the front end of the supply air pipe and installed in the cavity, an outer filter cylinder is threadedly connected to the left end air inlet of the miniature fan, a sleeve is slidably connected to the left end of the outer filter cylinder, the sleeve is threadedly connected to the front end of the return air pipe, an inner filter cylinder is slidably inserted into the left end of the outer filter cylinder, a drying capsule containing a drying agent is arranged between the inner wall of the outer filter cylinder and the inner filter cylinder, the drying capsule is made of non-woven fabric, and the left end of the inner filter cylinder is expanded and has the same diameter as the front end of the return air pipe.

[0015] The beneficial effects of the present application are as follows: When the cabinet door is opened, the frame cooperates with the abutting plate to surround and seal the main sealing ring, effectively avoiding the adhesion of various impurities on the surface of the main sealing ring caused by air and operation, and after the cabinet door is closed, the frame is first contracted to expose the main sealing ring by the adjusting assembly, and then the pressure frame is pressed to uniformly deform and fit into the inner wall of the port of the cabinet body, thereby realizing the cleaning and protection of the main sealing ring and greatly improving the sealing performance.

[0016] The application is characterized in that when the cabinet door is closed and abuts on the front wall of the cabinet body, the clamping column automatically limits the elastic lock block to lock the cabinet door, the corresponding abutting plate is inserted into the port of the cabinet body, the inner wall of the port of the cabinet body is automatically formed with a sealing gap in a loop shape and relatively sealed, and the sealing gap bottom is blocked by the partition block matched with the partition plate, so that the air circulation is controlled in cooperation with the air drying assembly, the floating dust in the sealing gap is cleaned and the sealing end face is dried in advance under the action of the sealing structure, and the sealing performance is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional structure diagram of the ring network cabinet of the application; Figure 2 is a three-dimensional cutaway view of the cabinet body part of the ring network cabinet of the application; Figure 3 is a three-dimensional cutaway view of the cabinet body and cabinet door part of the ring network cabinet of the application; Figure 4 is a three-dimensional cutaway view of the cabinet door and main sealing ring part of the ring network cabinet of the application; Figure 5 is a three-dimensional structure diagram of the pin frame and elastic lock block part of the ring network cabinet of the application; Figure 6 is a three-dimensional explosion view of the surrounding frame and pressing frame part of the ring network cabinet of the application; Figure 7 is a three-dimensional structure diagram of the abutting plate and main sealing ring part of the ring network cabinet of the application; Figure 8 is a three-dimensional cutaway view of the surrounding frame and pressing frame part of the ring network cabinet of the application; Figure 9 is a three-dimensional cutaway view of the air return pipe and air supply pipe part of the ring network cabinet of the application; Figure 10 is a three-dimensional cutaway view of the outer filter cartridge and sleeve part of the ring network cabinet of the application.

[0018] Reference signs: 1, cabinet body; 11, inner sealing gasket; 12, outer sealing gasket; 13, clamping column; 14, elastic strip; 2, cabinet door; 21, abutting plate; 22, main sealing ring; 23, surrounding frame; 24, outer guide groove; 25, partition plate; 26, pressing frame; 27, inner guide groove; 3, adjusting disc; 31, pin protrusion; 32, pin frame; 33, top rod; 34, crank; 35, elastic column; 4, elastic lock block; 5, elastic clamping frame; 6, touch block; 7, air return pipe; 71, air supply pipe; 72, electromagnetic valve; 73, micro air fan; 74, outer filter cartridge; 75, sleeve; 76, inner filter cartridge; 77, drying capsule. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0020] Example 1, as Figures 1-10 As shown, a modular stainless steel box airtight ring network cabinet comprises a cabinet 1, an elastic strip 14 is slidably connected to the left wall at the front end of the cabinet 1, a cabinet door 2 is movably hinged on the elastic strip 14, a butt plate 21 is fixedly connected to the inner side of the cabinet door 2, the inner wall of the port of the cabinet 1 has a sealing gap corresponding to the periphery of the butt plate 21, a main sealing ring 22 is fixedly connected to the edge of the butt plate 21, a surrounding frame 23 is slidably connected to the inner wall of the cabinet door 2 and movably abuts against the periphery of the butt plate 21, a pressure frame 26 is slidably connected to the inner wall of the surrounding frame 23 and movably abuts against the main sealing ring 22, a card column 13 is fixedly connected to the right wall of the front end of the cabinet 1, an elastic lock block 4 corresponding to the card column 13 is slidably connected in the right wall of the cabinet door 2, and an adjustment component is provided on the front wall of the cabinet door 2 for driving the main sealing ring 22 to be exposed and squeezed, and for driving the elastic lock block 4 to unlock; A partition 25 that can be inserted into the sealing gap is fixedly connected to the bottom of the frame 23, and a spacer is provided on the inner wall of the bottom of the sealing gap. The bottom of the cabinet door 2 has a cavity, and a drying component is provided in the cavity to clean and dry the dust in the sealing gap.

[0021] Initially, the cabinet door 2 is in an unclosed state, and the surrounding frame 23 cooperates with the abutment plate 21 to surround and seal the main sealing ring 22, thereby ensuring that when the cabinet door 2 is opened during the initial installation of electrical components and subsequent maintenance, various impurities in the air and caused by operation can be effectively prevented from adhering to the surface of the main sealing ring 22, and the risk of water vapor intrusion is reduced. When the cabinet door 2 needs to be closed, the control cabinet door 2 and the elastic strip 14 are at an angle of 90 degrees, and the cabinet door 2 is squeezed to one side of the cabinet body 1, so that the cabinet door 2 can be locked by using the card column 13 in combination with the elastic lock block 4. After the cabinet door 2 is locked, it is directly attached to the front wall of the cabinet body 1, and the corresponding abutment plate 21 is plugged into the cabinet In the port of cabinet 1, the inner wall of the port of cabinet 1 automatically forms a relatively sealed sealing gap in a loop shape, and the partition 25 cooperates with the spacer block to separate the bottom of the sealing gap, and cooperates with the operation of the air drying component to drive the air circulation in the sealing gap, so as to first clean the dust in the sealing gap and dry the sealing end face, i.e., the inner wall of cabinet 1, before sealing, to ensure a better sealing foundation. Subsequently, the control and adjustment component drives the surrounding frame 23 to shrink first to expose the main sealing ring 22, and then drives the pressure frame 26 to squeeze the main sealing ring 22 to evenly deform and fit it to the inner wall of the port of cabinet 1, thereby ensuring the cleanliness of the sealing connection surface and greatly improving the sealing performance.

[0022] Embodiment 2, based on the above embodiment, the middle part of the support plate 21 protrudes toward one side of the cabinet door 2, and the front wall has convex column parts all around to connect with the cabinet door 2, the inner side of the port of the cabinet body 1 has an inner edge corresponding to the support plate 21, the inner edge front wall is provided with an inner sealing gasket 11, and the front wall of the cabinet body 1 is provided with an outer sealing gasket 12.

[0023] When the cabinet door 2 is closed, the edge portion of the abutting plate 21 automatically abuts against the inner edge of the port of the cabinet body 1, and the cabinet door 2 is attached to the front wall of the cabinet body 1. Due to the existence of the inner sealing gasket 11 and the outer sealing gasket 12, not only can the inner and outer gaps of the sealing gap be sealed, the air tightness of the sealing gap is improved, and the dust cleaning and drying effect of the air drying assembly on the sealing gap is ensured, but also two additional seals are provided for the closure of the cabinet door 2 in cooperation with the main sealing ring 22, and the sealing performance is improved.

[0024] In example three, on the basis of the above examples, the edge of the main sealing ring 22 does not exceed the edge of the abutting plate 21, the side of the main sealing ring 22 facing the cabinet door 2 is inclined, the main sealing ring 22 has a matching fillet around the sealing gap, and the surrounding frame 26 is also filleted, and the outer wall of the abutting plate 21 is slidingly connected with the surrounding frame 26.

[0025] Through the design, the surrounding frame 23 abuts against the edge of the abutting plate 21, forming a reliable surrounding seal for the main sealing ring 22. After the surrounding frame 23 is retracted and moved, the inclined main sealing ring 22 is fully extruded by the surrounding frame 26, and the main sealing ring 22 is uniformly deformed outward.

[0026] In example four, on the basis of the above examples, the adjusting assembly includes outer guide grooves 24 opened on the left and right side walls of the surrounding frame 23, inner guide grooves 27 on the left and right side walls of the surrounding frame 26, a pin frame 32 movably connected between the outer guide grooves 24 and the inner guide grooves 27, pin rods at the left and right ends of the pin frame 32, the pin rods slidingly connected with the inner walls of the left and right sides of the cabinet door 2, an adjusting disc 3 rotatably connected to the inner wall of the cabinet door 2, a pin protrusion 31 movably connected with the pin frame 32 on the inner wall of the adjusting disc 3, and a crank 34 fixedly connected in the middle of the adjusting disc 3 and penetrating through the cabinet door 2.

[0027] The outer guide grooves 24 are composed of an outer vertical groove one, an outer inclined groove and an outer vertical groove two from top to bottom, and the inner guide grooves 27 are composed of an inner vertical groove and an inner inclined groove from top to bottom. The outer inclined groove is inclined backward, and the inner inclined groove is inclined forward. The outer guide grooves 24 and the inner guide grooves 27 have the same height at the top and bottom, and the outer vertical groove two and the inner inclined groove have the same height at the top and bottom.

[0028] When the cabinet door 2 is in the closed state, the control crank 34 drives the adjusting disc 3 to rotate counterclockwise, the pin convex 31 extrudes the pin frame 32 to move the pin rod downward, the pin rod extrudes the outer inclined groove and moves downward along the inner vertical groove, the surrounding frame 23 moves forward to shrink and avoid the main sealing ring 22, and the pressing frame 26 remains fixed. When the pin rod moves to the second outer vertical groove and extrudes the inner inclined groove, the surrounding frame 23 moves forward to the maximum distance and remains fixed and moves away from the periphery of the main sealing ring 22, and the pressing frame 26 moves forward to extrude the main sealing ring 22, drives the main sealing ring 22 to deform and expand outward to seal, thereby realizing step-by-step driving and avoiding wear of the main sealing ring 22.

[0029] In the above embodiment, two circumferentially arranged limiting grooves are formed in the left side of the front wall of the cabinet door 2, and a spring column 35 is slidably connected to the side of the front end of the crank 34 away from the shaft center and movably connected to the upper limiting groove.

[0030] When the cabinet door 2 is in the closed state, the control crank 34 drives the adjusting disc 3 to rotate counterclockwise, the pin convex 31 extrudes the pin frame 32 to move the pin rod downward, the pin rod extrudes the outer inclined groove and moves downward along the inner vertical groove, the surrounding frame 23 moves forward to shrink and avoid the main sealing ring 22, and the pressing frame 26 remains fixed. When the pin rod moves to the second outer vertical groove and extrudes the inner inclined groove, the surrounding frame 23 moves forward to the maximum distance and remains fixed and moves away from the periphery of the main sealing ring 22, and the pressing frame 26 moves forward to extrude the main sealing ring 22, drives the main sealing ring 22 to deform and expand outward to seal, thereby realizing step-by-step driving and avoiding wear of the main sealing ring 22.

[0031] In the above embodiment, two circumferentially arranged limiting grooves are formed in the left side of the front wall of the cabinet door 2, and a spring column 35 is slidably connected to the side of the front end of the crank 34 away from the shaft center and movably connected to the upper limiting groove.

[0032] When the cabinet door 2 is closed, the clamping column 13 is passively pressed to shrink the elastic lock block 4, and after the clamping column 13 is completely inserted into the locking cavity, the elastic lock block 4 is reset and clamped into the clamping hole, thereby safely locking the cabinet door 2. During this period, the elastic lock block 4 is shrunk to synchronously move the wedge groove to the right, but does not interfere with the top rod 33. Subsequently, when the cabinet door 2 needs to be opened, the crank 34 can be controlled to rotate clockwise, thereby driving the pin frame 32 to move the top rod 33 upward. The top rod 33 presses the inclined surface two, which also drives the elastic lock block 4 to shrink and move to the right. In cooperation with the compressed elastic strip 14, the cabinet door 2 is subjected to an outward force, thereby automatically moving away from the front wall of the cabinet body 1 and being opened. During this period, the pin frame 32 drives the pin rod to move upward along the outer vertical groove one in the outer guide groove 24 and the inner vertical groove in the inner guide groove 27. Regardless of whether the cabinet door 2 is opened from the only locked state or from the locked and sealed state, the main sealing ring 22 is always in the surrounding sealing state first. The protection of the main sealing ring 22 is reliable and stable.

[0033] In example seven, on the basis of the above-mentioned examples, the cabinet door 2 is integrally formed with a handle, the handle has a movable cavity at the rear side, a U-shaped elastic clamping frame 5 is slidably clamped in the movable cavity, the left end of the elastic clamping frame 5 is inserted into the adjusting disc 3, the front wall has a corresponding locking groove, and the right end of the elastic clamping frame 5 is inserted into the locking cavity opposite to the clamping column 13.

[0034] When the cabinet door 2 is closed, the clamping column 13 passively presses the elastic clamping frame 5 to shrink, the elastic clamping frame 5 is detached from the locking groove on the adjusting disc 3, thereby automatically releasing the locking of the adjusting disc 3. The adjusting disc 3 can be freely rotated in two directions to unlock or seal the cabinet door 2. When the cabinet door 2 is in the initial open state, the elastic clamping frame 5 is clamped with the locking groove on the adjusting disc 3, and the adjusting disc 3 cannot be deflected. When the cabinet door 2 is in the just opened state, the control crank 34 drives the adjusting disc 3 to rotate counterclockwise, that is, in the deflection direction. When the locking groove on the adjusting disc 3 passes through the elastic clamping frame 5, it is also locked again, thereby ensuring that when the cabinet door 2 is opened, the adjusting disc 3 cannot be rotated to adjust the exposure of the main sealing ring 22, and the use is safe and reliable.

[0035] In the above embodiment, the air drying assembly comprises a return air pipe 7 and a supply air pipe 71 fixedly inserted into the rear wall of the cavity and capable of communicating with the sealing gap, the rear end of the return air pipe 7 and the supply air pipe 71 is close to the two sides of the partition plate 25 respectively, and each is provided with an electromagnetic valve 72, the rear wall of the movable cavity is provided with a touch block 6 capable of electrically feedback controlling the opening of the electromagnetic valve 72, the front end of the supply air pipe 71 is fixedly connected with a micro fan 73 installed in the cavity, the left end of the micro fan 73 is threadedly connected with an outer filter cylinder 74, the outer periphery of the left end of the outer filter cylinder 74 is slidably connected with a sleeve 75 threadedly connected with the front end of the return air pipe 7, the left end of the outer filter cylinder 74 is slidably inserted with an inner filter cylinder 76, the inner filter cylinder 76 and the inner wall of the outer filter cylinder 74 are provided with a drying bag 77 containing a drying agent, the drying bag 77 is made of non-woven fabric, and the left end of the inner filter cylinder 76 is expanded and has the same diameter as the front end of the return air pipe 7.

[0036] When the cabinet door 2 is in the closed state, the partition plate 25 abuts against the partition block, thereby cutting off the bottom of the sealing gap, and the elastic clamping frame 5 extrudes the touch block 6, the touch block 6 controls the electromagnetic valves 72 on both sides to open, controls the micro fan 73 to run, and the supply air pipe 71 blows high-speed airflow to the right side of the cut-off, the airflow drives the floating dust and other impurities in the sealing gap to flow around quickly, enters the return air pipe 7 through the left side of the cut-off, and flows again after being filtered by the inner filter cylinder 76 and dried by the drying bag 77, thereby quickly removing the floating dust in the sealing gap and the water vapor on the sealing surface in advance, ensuring a better sealing basis and improving the sealing strength. When the cabinet door 2 is opened later, the elastic clamping frame 5 is separated from the touch block 6, and the electromagnetic valves 72 on both sides are closed again, thereby avoiding the drying bag 77 from being damp due to communication with the outside; In the later stage, the outer filter cylinder 74 and the sleeve 75 are threadedly detachable, which facilitates the disassembly and cleaning of the inner filter cylinder 76 and the replacement of the drying bag 77. Meanwhile, the design that the left end of the inner filter cylinder 76 is expanded and has the same diameter as the front end of the return air pipe 7 avoids the accidental sliding of the inner filter cylinder 76 into the return air pipe 7, and is convenient and safe to use.

[0037] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular stainless steel box airtight ring network cabinet, comprising a cabinet (1), characterized in that: The front left wall of the cabinet body (1) is slidably connected to an elastic strip (14), a cabinet door (2) is movably hinged on the elastic strip (14), the inner side of the cabinet door (2) is fixedly connected to a push plate (21), the inner wall of the cabinet body (1) port has a sealing gap corresponding to the periphery of the push plate (21), the edge of the push plate (21) is fixedly connected to a main sealing ring (22), the inner wall of the cabinet door (2) is slidably connected to a surrounding frame (23) that movably abuts against the periphery of the push plate (21), the inner wall of the surrounding frame (23) is slidably connected to a pressure frame (26) that movably abuts against the main sealing ring (22), the front right wall of the cabinet body (1) is fixedly connected to a card column (13), the right wall of the cabinet door (2) is slidably connected to an elastic locking block (4) corresponding to the card column (13), and the front wall of the cabinet door (2) is provided with an adjustment component for driving the main sealing ring (22) to be exposed and squeezed, and for driving the elastic locking block (4) to be unlocked; A partition (25) capable of being inserted into the sealing gap is fixedly connected to the bottom of the frame (23), and a spacer is provided on the inner wall of the bottom of the sealing gap. The bottom of the cabinet door (2) has a cavity, and a drying component for cleaning and drying floating dust in the sealing gap is provided in the cavity.

2. The modular stainless steel box airtight ring main unit according to claim 1, characterized in that: The middle portion of the support plate (21) protrudes toward one side of the cabinet door (2), and the front wall has convex column portions on all sides connected to the cabinet door (2). The inner side of the port of the cabinet body (1) has an inner edge corresponding to the support plate (21), and the front wall of the inner edge is provided with an inner sealing gasket (11). The front wall of the cabinet body (1) is provided with an outer sealing gasket (12).

3. The modular stainless steel box airtight ring main unit according to claim 2, characterized in that: The edge of the main sealing ring (22) does not exceed the edge of the support plate (21), and the main sealing ring (22) is inclined toward one side of the cabinet door (2). The main sealing ring (22) and the sealing gap have matching rounded corners around them, and the pressure frame (26) is also rounded around them. The outer wall of the support plate (21) is slidably connected to the pressure frame (26).

4. The modular stainless steel box airtight ring main unit according to claim 3, characterized in that: The adjustment assembly comprises outer guide grooves (24) provided on the left and right side walls of the surrounding frame (23), and inner guide grooves (27) provided on the left and right side walls of the pressure frame (26). A pin frame (32) is movably connected between the outer guide groove (24) and the inner guide groove (27). The left and right ends of the pin frame (32) are provided with pin rods, which are slidably connected to the inner walls of the cabinet door (2). The inner wall of the cabinet door (2) is rotatably connected to an adjustment disk (3). The inner wall of the adjustment disk (3) is provided with a pin protrusion (31) movably connected to the pin frame (32). The middle part of the adjustment disk (3) is fixedly connected to a crank (34) passing through the cabinet door (2).

5. The modular stainless steel box airtight ring main unit according to claim 4, characterized in that: The outer guide groove (24) is composed of a first outer vertical groove, an outer oblique groove, and a second outer vertical groove connected from top to bottom. The inner guide groove (27) is composed of a first inner vertical groove and an inner oblique groove connected from top to bottom. The outer oblique groove is inclined backward while the inner oblique groove is inclined forward. The outer guide groove (24) and the inner guide groove (27) have the same height at the upper and lower ends. The outer vertical groove (2) and the inner oblique groove have the same height at the upper and lower ends.

6. The modular stainless steel box airtight ring main unit according to claim 5, characterized in that: Two circumferentially arranged limiting grooves are provided on the left side of the front wall of the cabinet door (2); a side of the front end of the crank (34) away from the axis is slidably engaged with an elastic column (35) that is movably engaged with the upper limiting groove.

7. The modular stainless steel box airtight ring main unit according to claim 6, characterized in that: The cabinet door (2) has a locking cavity in its right wall, the elastic lock block (4) is located on the right wall of the locking cavity, the rear wall of the locking cavity has a through hole adapted to the clamping column (13), the right wall of the clamping column (13) has a bayonet capable of engaging with the elastic lock block (4), the left rear side of the elastic lock block (4) has a first inclined surface, the lower wall of the elastic lock block (4) has a wedge groove including a second inclined surface, the pin rod at the right end of the pin frame (32) is inserted into the locking cavity, and the upper end of the pin rod is fixedly connected to a top rod (33) that movably abuts against the second inclined surface.

8. The modular stainless steel box airtight ring main unit according to claim 7, characterized in that: The front wall of the cabinet door (2) is integrally formed with a handle, and the rear side of the handle has a movable cavity, in which a U-shaped elastic bracket (5) is slidably engaged, and the left end of the elastic bracket (5) is plugged into the adjustment disk (3), and the front wall has a corresponding locking groove, and the right end of the elastic bracket (5) is plugged into the locking cavity and opposite to the clamping column (13).

9. The modular stainless steel box airtight ring main unit according to claim 8, characterized in that: The air drying assembly comprises a return air duct (7) and an air supply duct (71) fixedly plugged into the rear wall of the cavity and capable of communicating with the sealing gap. The rear ports of the return air duct (7) and the air supply duct (71) are respectively close to both sides of the partition (25) and are both provided with a solenoid valve (72). A trigger block (6) for electrically feedback-controlling the opening of the solenoid valve (72) is installed on the rear wall of the active cavity. The front end of the air supply duct (71) is fixedly connected to a micro fan (73) installed in the cavity. The micro fan (73) is on the left and on the right. The air inlet at the end is threadedly connected to an outer filter cartridge (74), and the outer periphery of the left end of the outer filter cartridge (74) is slidably engaged with a sleeve (75) threadedly connected to the front end of the return air duct (7), and the left end of the outer filter cartridge (74) is slidably engaged with an inner filter cartridge (76), and a drying capsule (77) containing a desiccant is provided between the inner filter cartridge (76) and the inner wall of the outer filter cartridge (74), and the drying capsule (77) is made of non-woven fabric. The left end of the inner filter cartridge (76) is expanded and the diameter is the same as the diameter of the front end of the return air duct (7).

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