Airtight quick-opening access door

Abstract

The application relates to a closed quick-opening maintenance door, and relates to the field of maintenance doors, which comprises a mounting plate, a connecting frame and a sealing door, the mounting plate is provided with a maintenance opening, the connecting frame is fixedly connected to the maintenance opening of the mounting plate, the sealing door is used for sealing the connecting frame, the mounting plate is provided with a first fixing piece and a second fixing piece for fixing the sealing door, and a reinforcing gusset plate is arranged on the side wall close to the connecting frame after the sealing door is closed, the reinforcing gusset plate is provided with a hollow sealing strip, and the hollow sealing strip can abut against the connecting frame. The application has the effect of reducing the use cost of the sealing strip.

Description

Technical Field

[0001] This application relates to the field of access doors, and more particularly to a sealed quick-opening access door. Background Technology

[0002] Large equipment is usually designed with space for maintenance during manufacturing. The maintenance door is a sealed working door that connects the inside of the large equipment to the outside. When the equipment is in normal use, the maintenance door is closed to isolate the equipment from the outside world and reduce the interference of the external environment on the inside of the equipment. When the equipment needs maintenance, the maintenance door is opened to inspect and repair the inside of the equipment.

[0003] Existing access doors have a sealing strip attached. When the access door is closed, it presses against the door frame, with the sealing strip positioned between the access door and the door frame to seal the access door and improve its sealing performance. However, the sealing strip deforms after being squeezed and is difficult to restore. Therefore, a new sealing strip needs to be replaced every time the access door is used, which is an area that needs improvement. Summary of the Invention

[0004] To improve the service life of the sealing strip, this application provides a sealed quick-opening maintenance door.

[0005] The technical solution for the airtight quick-opening inspection door provided in this application is as follows:

[0006] A sealed quick-opening maintenance door includes a mounting plate, a connecting frame, and a sealing door. The mounting plate has a maintenance opening, and the connecting frame is fixedly connected to the maintenance opening of the mounting plate. The sealing door is used to seal the connecting frame. The mounting plate is provided with a first fixing member and a second fixing member for fixing the sealing door. After the sealing door is closed, a reinforcing pad is provided on the side wall near the connecting frame. The reinforcing pad is provided with a hollow sealing strip, which can abut against the connecting frame.

[0007] By adopting the above technical solution, after the sealing door is closed by the first and second fixing parts, the maintenance port is closed. When the sealing door is closed, the hollow sealing strip abuts against the connecting frame and deforms. After the sealing strip is squeezed, the maintenance port is sealed, so that the equipment is sealed. At the same time, the hollow sealing strip is preferably a D-shaped hollow strip, which is easier to seal and can rebound, so it has a long service life and does not need to be replaced after each maintenance, thus reducing maintenance costs.

[0008] Preferably, the first fixing member includes a first mounting block, a first mounting base, a connecting rod, a first connecting handwheel, a positioning member, and a first connecting plate. The first mounting block is connected to the connecting frame, the first connecting plate is connected to the first mounting block, the connecting rod is rotatably connected to the first connecting plate, the connecting rod is rotatably connected to the first mounting block, the first mounting base is connected to the sealing door, and the positioning member is connected to the first mounting base for positioning the connecting rod. The first connecting handwheel is sleeved on the connecting rod and threadedly connected to the connecting rod.

[0009] By adopting the above technical solution, after the sealing door is attached to the connecting frame, the positioning component positions the connecting rod. Then, the first connecting handwheel is rotated, causing the first connecting handwheel to move along the length of the connecting rod and abut against the positioning component, thereby making the sealing door further fit into the mounting frame. The operation is convenient, improving the convenience and speed of opening and closing the maintenance door.

[0010] Preferably, the positioning element includes a first connecting plate, which has a first fixing port for inserting the connecting rod.

[0011] By adopting the above technical solution, after the connecting rod rotates, it is inserted into the first fixing hole at the first positioning plate, and the connecting rod abuts against the inner wall of the first fixing hole, thereby fixing the connecting rod. Then, the first connecting handwheel is rotated so that the first connecting handwheel abuts against the first positioning plate, so that the sealing door and the connecting frame fit more tightly.

[0012] Preferably, the positioning element includes a second positioning plate and a sleeve ring, the second positioning plate is connected to the first mounting base, the sleeve ring is connected to the second positioning plate, and the connecting rod can be inserted into the sleeve ring.

[0013] By adopting the above technical solution, the connecting rod is inserted into the sleeve ring, and the outer wall of the connecting rod abuts against the inner wall of the sleeve ring. After rotating the first connecting handwheel, the first connecting handwheel is pressed against the side wall of the sleeve ring, so that the sleeve ring and the connecting rod are fixed. When the second fixing member is operated, the second fixing member is separated from the sealing door. When the sealing door is rotated, the connecting rod rotates synchronously, which enables the sealing door to be opened without having to separate the second fixing member from the sealing door again, further improving the convenience of opening and closing the sealing door.

[0014] Preferably, the first fixing member and the second fixing member are located on both sides of the length direction of the sealed door. The second fixing member includes a second mounting block, a connecting member, a second connecting plate, a second connecting handwheel, a handwheel rod, and an opening pressure block. The second mounting block is connected to the connecting frame, the second connecting plate is connected to the second mounting block, the handwheel rod is rotatably connected to the second connecting plate, the connecting member is connected to the sealed door and used to fix the opening pressure block, the opening pressure block is provided with a clearance opening for the handwheel rod to be inserted, and the second connecting handwheel is sleeved on the handwheel rod and threadedly connected to the handwheel rod.

[0015] By adopting the above technical solution, after the sealing door is closed, the handwheel is rotated so that it is inserted into the clearance slot of the opening pressure block. Then, the second connecting handwheel is rotated so that the second connecting handwheel and the opening pressure block are pressed together and further improve the sealing performance of the sealing door.

[0016] Preferably, the connector includes a mounting base, a connecting bolt, and a connecting base. The mounting base is connected to the sealing door, the connecting base is connected to the mounting base, the connecting bolt passes through the connecting base and is threadedly connected to the mounting base, and the opening pressure block is connected to the connecting base.

[0017] By adopting the above technical solution, the connecting base and the mounting base can be separated after the connecting bolts are removed, which makes it easier to replace the opening pressure block.

[0018] Preferably, the connector includes a fixed base, which is connected to the sealing door, and the opening pressure block is connected to the fixed base.

[0019] By adopting the above technical solution, the fixing seat and the opening pressure block are integrally injection molded. After the fixing seat is welded to the sealing door, the opening pressure block can also be fixed synchronously. On the one hand, the production cost of the connecting parts and the opening pressure block is reduced, and on the other hand, the connection speed of the connecting parts and the opening pressure block is improved.

[0020] Preferably, the opening pressure block is provided with a fastening bevel.

[0021] By adopting the above technical solution, the fastening slope is a sloped structure, which makes the opening pressure block trapezoidal. When the second connecting handwheel is rotated, it can be pressed tighter and tighter, reducing the occurrence of the connecting rod slipping out from the side, further improving the overall stability of the second fixing component, thereby improving the sealing performance of the sealing door.

[0022] Preferably, a rotating plate is provided on the side wall of the connecting frame, a rotating rod is rotatably mounted on the rotating plate, a synchronizing rod is provided on the rotating rod, the side wall of the synchronizing rod is fitted with the side wall of the connecting frame, and the side wall of the synchronizing rod is fitted with the side wall of the sealing door.

[0023] By adopting the above technical solution, after the rotating rod rotates, it drives the synchronizing rod to rotate synchronously. After the synchronizing rod rotates, it fits against the side wall of the sealing door, thereby limiting the position of the sealing door and improving the stability of the sealing door.

[0024] Preferably, the synchronizing rod has a limiting groove along the height direction of the sealing door, and a limiting rod is inserted into the limiting groove. The limiting rod can slide along the length direction of the limiting groove. The sealing door is provided with a limiting frame for inserting the limiting rod. The inner wall of the limiting frame is adapted to the outer wall of the limiting rod. An elastic element is provided in the limiting groove. One end of the elastic element is connected to the end wall of the limiting groove, and the other end of the elastic element is connected to the limiting rod.

[0025] By adopting the above technical solution, when the synchronizing rod rotates, the limiting rod slides along the length of the limiting groove under the action of the elastic element and is inserted into the limiting frame. The outer wall of the limiting rod and the inner wall of the limiting frame fit together, thereby limiting the limiting rod and further fixing the sealing door, thus improving the stability of the sealing door and reducing the occurrence of sealing door displacement.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. After the sealing door is closed by the first and second fixing parts, the maintenance port is closed. When the sealing door is closed, the hollow sealing strip abuts against the connecting frame and deforms. After the sealing strip is squeezed, the maintenance port is sealed so that the equipment is sealed. At the same time, the hollow sealing strip is preferably a D-type hollow strip, which is easier to seal and can rebound, so it has a long service life and does not need to be replaced after each maintenance, thus reducing maintenance costs.

[0028] 2. The sealing door is fixed by the cooperation of the first and second fixing parts so that the sealing door seals the connecting frame. The first fixing part is fixed and pressed by the first connecting handwheel, and the second fixing part is pressed by the second connecting handwheel. Compared with the traditional bolt connection, it is more convenient and faster, and improves the opening and closing speed of the maintenance door. At the same time, the handwheel makes it easier to press.

[0029] 3. After the inspection door is closed, the rotating rod rotates so that the synchronizing rod fits against the side wall of the sealing door. Then, under the action of the elastic element, the limiting rod is inserted into the corresponding limiting groove, so that the limiting rod further limits the sealing door, thereby reducing the occurrence of sealing door displacement and further improving the stability and sealing performance of the sealing door. Attached Figure Description

[0030] Figure 1 This is an overall schematic diagram of a sealed quick-opening inspection door according to an embodiment of this application.

[0031] Figure 2 It is a schematic diagram used to illustrate the positional relationship between the sealing door and the connecting frame when the sealing door is in the open state.

[0032] Figure 3 yes Figure 2 Enlarged schematic diagram of section B.

[0033] Figure 4 This is a schematic diagram used to illustrate the overall status of a sealed quick-opening inspection door.

[0034] Figure 5 yes Figure 4 Enlarged schematic diagram of section C.

[0035] Figure 6 This is an enlarged schematic diagram illustrating the connection relationship between the connector, the connecting frame, and the sealing door in Embodiment 2.

[0036] Figure 7 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0037] Figure 8 This is an enlarged schematic diagram illustrating the connection relationship between the positioning component, the connecting frame, and the sealing door in Embodiment 3.

[0038] Figure 9 It is a partial cross-sectional schematic diagram used to illustrate the connection relationship between the limit rod, the synchronizing rod and the rotating rod.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Mounting plate; 11. Maintenance port; 2. Connecting frame; 3. Sealing door; 31. Limiting frame; 4. First fixing component; 41. First mounting block; 42. First mounting base; 43. Connecting rod; 44. First connecting handwheel; 45. Positioning component; 451. First positioning plate; 452. First fixing port; 453. Second positioning plate; 454. Socket ring; 46. First connecting plate; 5. Second fixing component; 51. Second mounting block; 5 2. Connecting parts; 521. Mounting base; 522. Connecting bolt; 523. Connecting base; 524. Fixing base; 53. Second connecting plate; 54. Second connecting handwheel; 55. Handwheel lever; 56. Opening pressure block; 561. Leaving opening; 562. Fastening bevel; 6. Reinforcing pad; 61. Hollow sealing strip; 7. Rotating plate; 71. Rotating rod; 72. Synchronizing rod; 73. Limiting groove; 74. Limiting rod; 75. Elastic element. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0042] This application discloses a sealed quick-opening inspection door.

[0043] Example 1:

[0044] Reference Figure 1 , Figure 2 and Figure 3 A sealed quick-opening maintenance door includes a mounting plate 1, a connecting frame 2, and a sealing door 3. A maintenance opening 11 is provided through the surface of the mounting plate 1 along its thickness direction. The maintenance opening 11 is rectangular, allowing maintenance personnel to enter the equipment for inspection and maintenance. The connecting frame 2 is welded and fixed to the mounting plate 1 at the maintenance opening 11, and the connecting frame 2 is arranged around the perimeter of the maintenance opening 11. The sealing door 3 is located on the side of the connecting frame 2 away from the mounting plate 1. The sealing door 3 and the connecting frame 2 are mutually compatible. When the sealing door 3 is closed, its sidewall fits against the connecting frame 2, thereby closing the maintenance opening 11. A first fixing member 4 and a second fixing member 5 are installed at the connecting frame 2 to fix the sealing door 3. The first fixing member 4 and the second fixing member 5 are respectively located on both sides of the length direction of the sealing door 3. In this embodiment, three first fixing members 4 and three second fixing members 5 are provided. Each first fixing member 4 has one second fixing member 5 symmetrically arranged along the length direction of the sealing door 3 to fix the sealing door 3 to the mounting frame.

[0045] A reinforcing pad 6 is welded to the side wall of the sealing door 3 near the mounting plate 1. The reinforcing pad 6 is arranged around the circumference of the connecting frame 2. A hollow sealing strip 61 is glued to the side of the reinforcing pad 6 away from the sealing door 3. The hollow sealing strip 61 is arranged around the reinforcing pad 6. When the sealing door 3 is closed, the hollow sealing strip 61 presses against the side wall of the connecting frame 2 and deforms. At the same time, the reinforcing pad 6 is also pressed against the side wall of the connecting frame 2. The hollow sealing strip 61 is made of D-shaped hollow rubber, which further improves the sealing effect of the sealing door 3 and has a long service life, effectively reducing the replacement frequency of the sealing strip.

[0046] Reference Figure 4 and Figure 5The first fixing component 4 includes a first mounting block 41, a first mounting base 42, a connecting rod 43, a first connecting handwheel 44, a positioning component 45, and a first connecting plate 46. The first mounting block 41 is a rectangular block, and is set along the height direction of the connecting frame 2. The first mounting block 41 is welded and fixed to the connecting frame 2. In this embodiment, two first connecting plates 46 are provided. The first connecting plates 46 are welded and fixed to the first mounting blocks 41. The two first connecting plates 46 are located at both ends of the length direction of the first mounting block 41, and are arranged opposite to each other. The connecting rod 43 is located between the two first connecting plates 46, and is rotatably connected to the first connecting plate 46 through a rotating shaft. The mounting base 42 is welded and fixed to the side wall of the sealing door 3. The first mounting base 42 is a rectangular block. The positioning component 45 includes a first positioning plate 451, which is located on the side wall of the first mounting base 42. The first positioning plate 451 is fixedly connected to the first mounting base 42 by screws. The first connecting handwheel 44 is sleeved on the connecting rod 43 and is threadedly connected to the connecting rod 43. The first positioning plate 451 has a first fixing port 452. After the connecting rod 43 is rotated, it can be inserted into the first fixing port 452. After rotating the first connecting handwheel 44, the first connecting handwheel 44 is pressed against the first positioning plate 451, thereby fixing the sealing door 3 and closing the maintenance door.

[0047] Reference Figure 1 and Figure 7 The second fixing component 5 includes a second mounting block 51, a connector 52, a second connecting plate 53, a second connecting handwheel 54, a handwheel rod 55, and an opening pressure block 56. The second mounting block 51 is a rectangular block and is arranged along the height direction of the connecting frame 2. The second mounting block 51 is fixedly connected to the connecting frame 2 by screws. The second connecting plate 53 is welded and fixed to the second mounting block 51. In this embodiment, there are two second connecting plates 53, which are arranged opposite to each other. The handwheel rod 55 is located between the two second connecting plates 53 and is rotatably connected to the second connecting plate 53 through a rotating shaft. The connector 52 is connected to the sealing door 3 and fixes the opening pressure block 56. The opening pressure block 56 is a rectangular piece and has a clearance opening 561 through its thickness direction for the handwheel rod 55 to be inserted. The second handwheel rod 55 is sleeved on the connecting rod 43 and threadedly connected to the connecting rod 43.

[0048] Reference Figure 1 and Figure 7The connector 52 includes a mounting base 521, a connecting bolt 522, and a connecting base 523. The mounting base 521 is welded and fixed to the outer wall of the sealing door 3. The connecting base 523 is fitted to the side wall of the mounting base 521. The connecting bolt 522 passes through the connecting base 523 and is threadedly connected to the mounting base 521, thereby fixing the mounting base 521 and the connecting base 523. The opening pressure block 56 is welded and fixed to the side wall of the connecting base 523. When the sealing door 3 is closed, the handwheel lever 55 is rotated so that the handwheel lever 55 is inserted into the relief opening 561. Then, the second connecting handwheel 54 is operated so that the second connecting handwheel 54 is pressed against the side wall of the opening pressure block 56, thereby fixing the sealing door 3.

[0049] Reference Figure 7 The opening pressure block 56 has a fastening inclined surface 562, which makes the opening pressure block 56 trapezoidal. When the second connecting handwheel 54 is rotated, the opening pressure block 56 and the second connecting handwheel 54 become tighter and tighter, thereby reducing the occurrence of the handwheel rod 55 slipping out from the relief opening 561 and further improving the stability of the second fixing member 5.

[0050] Reference Figure 1 and Figure 9 A rotating plate 7 is installed on the side wall of the connecting frame 2. Rotating plates 7 are provided on both sides of the connecting frame 2 along its length. The rotating plates 7 on both sides of the connecting frame 2 are symmetrically arranged in pairs. Two rotating plates 7 are provided on each side of the connecting frame 2, located at opposite ends along its length. A rotating rod 71 is installed between the two opposite rotating plates 7 on the same side of the connecting frame 2. The rotating rod 71 is positioned along the height of the sealing door 3. Both ends of the rotating rod 71 extend along its length and pass through the rotating plates 7. The rotating rod 71 and... The rotating plates 7 are connected by bearings. Synchronizing rods 72 are installed at both ends of the rotating rod 71 along its length. The synchronizing rods 72 are sleeved on the rotating rod 71 and keyed to it. When the rotating rod 71 rotates, the synchronizing rods 72 rotate synchronously. The synchronizing rods 72 are waist-shaped rods and fit against the side wall of the connecting frame 2. After the synchronizing rods 72 rotate, their side walls fit against the side wall of the sealing door 3, which facilitates the confirmation of the sealing door 3 and its installation position, and limits the sealing door 3, further improving the stability of the sealing door 3 and reducing the occurrence of displacement of the sealing door 3.

[0051] Reference Figure 9The synchronizing rod 72 has a limiting groove 73 along the length of the rotating rod 71. A limiting rod 74 is inserted into the limiting groove 73. The outer wall of the limiting rod 74 is adapted to the inner wall of the limiting groove 73. The limiting rod 74 can slide along the length of the limiting groove 73. The surface of the sealing door 3 is fixedly connected to a limiting frame 31 for the insertion of the limiting rod 74 by screws. When the synchronizing rod 72 rotates, the limiting rod 74 is inserted into the limiting frame 31. The outer wall of the limiting rod 74 is adapted to the inner wall of the limiting frame 31, thereby fixing the limiting rod 74 and improving the stability of the limiting rod 74, thus improving the stability of the sealing door 3.

[0052] Reference Figure 9 An elastic element 75 is inserted into the limiting groove 73. In this embodiment, the elastic element 75 is a spring. One end of the elastic element 75 is welded and fixed to the end wall of the limiting groove 73, and the other end of the elastic element 75 is welded and fixed to the limiting rod 74. When the limiting rod 74 is inserted into the limiting groove 73, the elastic element 75 is in a contracted state. When the synchronizing rod 72 rotates to align the limiting groove 73 with the limiting frame 31, the elastic element 75 expands. Under the elastic action, the limiting rod 74 further slides along the length direction of the limiting groove 73 and is inserted into the limiting frame 31, thereby making it more convenient and faster to insert the limiting rod 74 into the limiting frame 31.

[0053] Example 2:

[0054] A type of sealed quick-opening inspection door, such as Figure 6 As shown, the difference from Embodiment 1 is that the connector 52 includes a fixing seat 524, which is welded to the sealing door 3, and the opening pressure block 56 is integrally formed with the fixing seat 524, thereby reducing the installation cost of the connector 52.

[0055] Example 3:

[0056] A type of sealed quick-opening inspection door, such as Figure 8 As shown, the difference from Embodiment 1 is that the positioning member 45 includes a second positioning plate 453 and a sleeve ring 454. The second positioning plate 453 is fixedly connected to the side wall of the first mounting base 42 by screws. The sleeve ring 454 and the second positioning plate 453 are integrally formed. The connecting rod 43 passes through the sleeve ring 454 and is slidably connected to the sleeve ring 454. There is frictional resistance between the connecting rod 43 and the sleeve ring 454. After the second positioning member 45 is opened, the sealing door 3 can be directly rotated, so that the connecting rod 43 drives the sealing door 3 to rotate and open, further improving the convenience of opening and closing the sealing door 3.

[0057] The implementation principle of a sealed quick-opening inspection door in this application embodiment is as follows:

[0058] After the sealing door 3 is closed, the reinforcing pad 6 and the connecting frame 2 together compress the hollow sealing strip 61. The hollow sealing strip 61 deforms under the compressive force, which makes the fit between the reinforcing pad 6, the hollow sealing strip 61 and the connecting frame 2 tighter and completes the seal. There is no need to replace the sealing strip every time the sealing door 3 is opened, which further improves the service life of the hollow sealing strip 61 and reduces the usage cost of the hollow sealing strip 61.

[0059] This specific embodiment is merely an explanation of this application and is not intended to limit it. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A sealed, quick-opening inspection door, characterized in that: The assembly includes a mounting plate (1), a connecting frame (2), and a sealing door (3). The mounting plate (1) has a maintenance opening (11). The connecting frame (2) is fixedly connected to the maintenance opening (11) of the mounting plate (1). The sealing door (3) is used to seal the connecting frame (2). The mounting plate (1) is provided with a first fixing member (4) and a second fixing member (5) for fixing the sealing door (3). After the sealing door (3) is closed, a reinforcing pad (6) is provided on the side wall near the connecting frame (2). The reinforcing pad (6) is provided with a hollow sealing strip (61). The hollow sealing strip (61) can abut against the connecting frame (2). The first fixing member (4) includes a first mounting block (41), a first mounting base (42), a connecting rod (43), a first connecting handwheel (44), a positioning member (45), and a first connecting plate (46). The first mounting block (41) is connected to the connecting frame (2), the first connecting plate (46) is connected to the first mounting block (41), the connecting rod (43) is rotatably connected to the first connecting plate (46), the connecting rod (43) is rotatably connected to the first mounting block (41), the first mounting base (42) is connected to the sealing door (3), the positioning member (45) is connected to the first mounting base (42) for positioning the connecting rod (43), and the first connecting handwheel (44) is sleeved on the connecting rod (43) and threadedly connected to the connecting rod (43). The positioning component (45) includes a second positioning plate (453) and a sleeve ring (454). The second positioning plate (453) is connected to the first mounting base (42), and the sleeve ring (454) is connected to the second positioning plate (453). The connecting rod (43) can be inserted into the sleeve ring (454). The first fixing member (4) and the second fixing member (5) are located on both sides of the length direction of the sealing door (3). The second fixing member (5) includes a second mounting block (51), a connector (52), a second connecting plate (53), a second connecting handwheel (54), a handwheel rod (55), and an opening pressure block (56). The second mounting block (51) is connected to the connecting frame (2). The second connecting plate (53) is connected to the second mounting block (51). The handwheel rod (55) is rotatably connected to the second connecting plate (53). The connector (52) is connected to the sealing door (3) and is used to fix the opening pressure block (56). The opening pressure block (56) is provided with a clearance slot (561) for the handwheel rod (55) to be inserted. The second connecting handwheel (54) is sleeved on the handwheel rod (55) and threadedly connected to the handwheel rod (55). A rotating plate (7) is provided on the side wall of the connecting frame (2). A rotating rod (71) is rotatably provided on the rotating plate (7). A synchronizing rod (72) is provided on the rotating rod (71). The side wall of the synchronizing rod (72) is attached to the side wall of the connecting frame (2). The side wall of the synchronizing rod (72) is attached to the side wall of the sealing door (3).

2. The airtight quick-opening inspection door according to claim 1, characterized in that: The connector (52) includes a mounting base (521), a connecting bolt (522), and a connecting base (523). The mounting base (521) is connected to the sealing door (3), the connecting base (523) is connected to the mounting base (521), the connecting bolt (522) passes through the connecting base (523) and is threadedly connected to the mounting base (521), and the opening pressure block (56) is connected to the connecting base (523).

3. The airtight quick-opening inspection door according to claim 1, characterized in that: The connector (52) includes a fixing seat (524), which is connected to the sealing door (3), and the opening pressure block (56) is connected to the fixing seat (524).

4. A sealed quick-opening inspection door according to claim 1, characterized in that: The opening pressure block (56) is provided with a fastening inclined surface (562).

5. A sealed quick-opening inspection door according to claim 1, characterized in that: The synchronizing rod (72) has a limiting groove (73) along the height direction of the sealing door (3). A limiting rod (74) is inserted in the limiting groove (73). The limiting rod (74) can slide along the length direction of the limiting groove (73). The sealing door (3) is provided with a limiting frame (31) for the insertion of the limiting rod (74). The inner wall of the limiting frame (31) is adapted to the outer wall of the limiting rod (74). An elastic element (75) is provided in the limiting groove (73). One end of the elastic element (75) is connected to the end wall of the limiting groove (73), and the other end of the elastic element (75) is connected to the limiting rod (74).

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