Heat preservation door body of ultralow-temperature refrigeration house

Abstract

The invention belongs to the technical field of ultralow-temperature cold storage heat preservation door bodies, and discloses an ultralow-temperature cold storage heat preservation door body which comprises a door body, a mounting plate is arranged on the rear side of the door body, an observation window is arranged on one side of the door body, a groove is formed in the mounting plate, a moving groove is formed in the position, located on one side of the door, of one side of the groove, and a moving opening is formed in the outer side of the mounting plate. A motor is arranged in the groove, and the output end of the motor is in transmission connection with a threaded rod. Through movement of the sealing plate, after the door body is closed and the sealing strip at the door frame is attached to the door body, the sealing plate can seal the sealing strip and the rear side of the door body again, and the situation that after the sealing strip is used for a long time, a gap is generated between the door body and the door frame, leakage is generated, and use of the refrigeration house is affected is conveniently prevented; and when the door body is closed, the door body and one side of the mounting plate are buffered through a first anti-collision plate 19 and a second anti-collision plate 22, and therefore the situation that the door body collides with the door frame at the too high closing speed, and consequently the heat preservation door is damaged and inconvenient to use is conveniently prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal insulation door bodies of ultra-low temperature cold storages, and in particular relates to a thermal insulation door body of an ultra-low temperature cold storage. Background Art

[0002] Cold storage is a building that uses artificial refrigeration to make a fixed space reach the specified temperature, which is also very convenient for storing items. The cold storage door refers to the door installed in cold storage equipment, frozen warehouses and other freezing environment equipment to insulate and seal. The insulation door body of the ultra-low temperature cold storage is a cold storage door body specially designed for ultra-low temperature environments, with extremely high insulation performance and special structural design. This door body is mainly used in ultra-low temperature cold storage, which can keep the temperature inside the cold storage stable in an extremely low temperature environment, prevent external heat from entering the cold storage, and ensure a low temperature environment for stored items.

[0003] However, in the prior art, when the insulated door of the cold storage is closed, it collides with the door frame too quickly, causing damage to the insulated door. After closing, the sealing strip is deformed due to long-term use, resulting in a gap at the door, affecting the sealing of the cold storage. When the gap is small and not easily noticeable, the cold air in the cold storage escapes through the gap, thus affecting its use. Summary of the invention

[0004] The present invention aims at the problems in the prior art and proposes the following technical solutions: an insulated door body of an ultra-low temperature cold storage, comprising a door body, a mounting plate is arranged on the rear side of the door body, an observation window is arranged on one side of the door body, a groove is arranged inside the mounting plate, a movable groove is arranged on one side of the groove and located on one side of the door, a movable opening is arranged on the outer side of the mounting plate, a motor is arranged inside the groove, a threaded rod is transmission-connected to the output end of the motor, a movable block is threadedly connected to one end of the threaded rod, limiting columns are slidably connected to both ends of the movable plate, a pushing plate is hinged on the top of the movable plate, a first movable block is hinged on one end of the pushing plate located on the left and right sides of the movable plate, a second movable block is hinged on one end of the pushing plate located on the upper side of the movable plate, a third movable block is hinged on one end of the pushing plate located on the lower side of the movable plate, a sealing plate is fixedly connected to one side of the first movable block, a first mounting groove is arranged inside the right sealing plate, a second mounting groove is arranged on one side of the door body, a movable opening is arranged on the side of the door body close to the mounting plate, and anti-collision structures are arranged inside the first mounting groove and the second mounting groove.

[0005] As a preferred embodiment of the above technical solution, an observation window is located at the top of the mounting plate and one end of the door body, a cleaning structure is provided on the outside of the observation window on one side of the mounting plate, a handle is provided on the front side of the door body, on one side of the mounting plate and at the bottom of the observation window, and the cleaning structure is located on the top of the handle.

[0006] As a preferred embodiment of the above technical solution, the motor is fixedly installed on the inner wall of one side of the groove, the threaded rod passes through the groove and extends to the inside of the movable groove, and one end thereof is slidably connected to the inner wall of the movable groove, the limiting columns are located on both sides of the threaded rod, the end of the threaded rod away from the motor is fixedly installed on the inner wall of the movable groove, the first movable block, the second movable block and the third movable block are all movably connected to the inner wall of the movable groove, and the sealing plate is located inside the movable opening.

[0007] As a preferred embodiment of the above technical solution, the pushing plates on the left and right sides of the movable plate are the same length, the length of the movable plate on the upper side of the movable plate is smaller than the length of the pushing plate on the lower side of the movable plate, the shape of the third movable block is U-shaped, and the observation window is located in the middle of the U-shaped plate.

[0008] As a preferred embodiment of the above technical solution, the anti-collision structure includes a movable rod, a fixed rod is fixedly installed at the bottom of the movable rod, a slider is movably connected to one end of the movable rod, a movable plate is hinged at the bottom of one side of the slider, a connecting block is hinged at one end of the movable plate, a first anti-collision plate is fixedly installed on one side of the connecting block, and a connecting spring is fixedly installed on the other side, one end of the connecting spring is fixedly installed on one side of the fixed rod, a connecting rod is fixedly installed on one side of the first anti-collision strip, and a second anti-collision plate is fixedly installed on one end of the connecting rod.

[0009] As a preferred embodiment of the above technical solution, the top end of the movable rod and the bottom end of the fixed rod are both fixedly installed inside the first mounting groove, and the side away from the movable plate is slidably connected to the inner wall of the first mounting groove, and both sides of the connecting block are slidably connected to the inner wall of the first mounting groove, one end of the first anti-collision plate is located inside the first mounting groove, and the other end is located outside the sealing plate, the connecting rod passes through the movable opening and extends to the inside of the second mounting groove, one end of the second anti-collision plate is located on the inner wall of the second mounting groove, and the other end is located on one side of the door body, and a fixed spring is fixedly installed on the second anti-collision plate close to the second mounting groove, and one end of the fixed spring is fixedly installed to the inner wall of the second mounting groove.

[0010] As a preferred embodiment of the above technical solution, the cleaning structure includes a mounting block, one side of the mounting block is fixedly mounted to one side of the mounting plate, connecting plates are slidably connected to the inner walls of both sides of the mounting block, cleaning blocks are fixedly connected to the sides of the connecting plates close to each other, and an electric push rod is fixedly mounted inside the mounting block located at the top of the handle, and the top of the electric push rod is fixedly mounted to the connecting plate.

[0011] As a preferred embodiment of the above technical solution, a through hole is opened on one side of the sealing plate on the right side of the mounting plate, the through hole passes through one side of the mounting plate, the slider is arranged corresponding to the through hole, a first magnetic block is fixedly installed on the side opposite to the slider and the through hole, a second magnetic block is magnetically connected to one side of the first magnetic block, a moving rod is fixedly installed on one side of the second magnetic block, a limiting block is fixedly installed on one side of the moving rod, a press block is fixedly installed on the top of the limiting block, and a button is fixedly installed on the bottom of the electric push rod.

[0012] As a preferred embodiment of the above technical solution, the mounting blocks are located on both sides of the observation window, the cleaning block and the connecting plate are located on the top of the observation window, the limiting block and the pressing block are located inside the mounting block, one side of the limiting block is slidably connected to the inner wall of the mounting block, the pressing block is located at the bottom of the button, and the moving rod extends through the through hole to the inside of the first mounting groove.

[0013] The beneficial effects of the present invention are:

[0014] (1) The present invention can move the sealing plate to seal the sealing strip and the rear side of the door body again after the door body is closed, after the sealing strip at the door frame is attached to the door body, so as to prevent the sealing strip from being damaged after long-term use, resulting in a gap between the door body and the door frame, causing leakage, thereby affecting the use of the cold storage. When the door body is closed, the first anti-collision plate 19 and the second anti-collision plate 22 buffer the door body and one side of the mounting plate, so as to prevent the door body from colliding with the door frame too quickly when closing, causing damage to the thermal insulation door and inconvenience in use.

[0015] (2) The present invention moves the sealing plate so that the push block and the button move the electric push rod up and down, so that the cleaning structure can clean the observation window on one side of the mounting plate, thereby preventing the door from encountering external air after opening. When the temperature difference between the inside and outside is large, water vapor is generated on the observation window, thereby affecting the observation effect of the observation window. In addition, water vapor dripping onto the mounting plate will affect the use of the cooling and heat-insulating door. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a structural diagram of the front side of the door body of the embodiment;

[0017] Figure 2 What is shown is a structural diagram of the rear side of the door body of the embodiment;

[0018] Figure 3 What is shown is the internal structure diagram of the mounting plate of the embodiment;

[0019] Figure 4 Shown is a cross-sectional view of the mounting plate and the door body of the embodiment;

[0020] Figure 5 Shown is a structural diagram of a door body and a mounting plate of an embodiment;

[0021] Figure 6 The structure diagram of the push plate, the sealing plate, the first moving block, the second moving block and the third moving block of the embodiment is shown;

[0022] Figure 7 What is shown is a structural diagram of a sealing plate and an anti-collision structure of an embodiment;

[0023] Figure 8 The internal structure diagram of the first installation slot of the embodiment is shown;

[0024] Fig. 9 Shown is a structural diagram of an embodiment cleaning structure.

[0025] In the figure: 1. door body; 2. mounting plate; 3. observation window; 4. motor; 5. threaded rod; 6. movable block; 7. push plate; 8. first movable block; 9. second movable block; 10. third movable block; 11. sealing plate; 12. cleaning structure; 121. mounting block; 122. connecting plate; 123. cleaning block; 124. electric push rod; 13. handle; 14. movable rod; 15. fixed rod; 16. slider; 17. movable plate; 18. connecting block; 19. first anti-collision plate; 20. connecting spring; 21. connecting rod; 22. second anti-collision plate; 23. fixed spring; 24. first magnetic block; 25. second magnetic block; 26. movable rod; 27. limiting block; 28. pressing block; 29. ​​button. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] The present invention provides a heat preservation door body 1 of an ultra-low temperature cold storage, such as Figures 1 to 4 As shown, it includes a door body 1, a mounting plate 2 is arranged at the rear side of the door body 1, an observation window 3 is arranged on one side of the door body 1, a groove is opened inside the mounting plate 2, a movable groove is opened on one side of the groove and located on one side of the door, a movable opening is opened on the outer side of the mounting plate 2, a motor 4 is arranged inside the groove, a threaded rod 5 is connected to the output end of the motor 4, a movable block 6 is threadedly connected to one end of the threaded rod 5, limiting columns are slidably connected to both ends of the movable plate 17, a push plate 7 is hinged on the top of the movable plate 17, and one end of the push plate 7 located on the left and right sides of the movable plate 17 A first moving block 8 is hingedly connected, a second moving block 9 is hingedly connected to one end of the pushing plate 7 located on the upper side of the movable plate 17, and a third moving block 10 is hingedly connected to one end of the pushing plate 7 located on the lower side of the movable plate 17. A sealing plate 11 is fixedly connected to one side of the first moving block 8, the second moving block 9 and the third moving block 10, a first mounting groove is opened inside the right sealing plate 11, a second mounting groove is opened on one side of the door body 1, and a movable opening is opened on the side of the door body 1 close to the mounting plate 2, and anti-collision structures are arranged inside the first mounting groove and the second mounting groove.

[0028] The observation window 3 is convenient for observing the situation inside the cold storage. When the door body 1 is closed, the sealing strip at the door frame fits with the door body 1 to block the gap between the door body 1 and the door frame, and then the motor 4 is started, so that the motor 4 drives the threaded rod 5 and the movable plate 17 to rotate along the inner wall of the movable groove. Under the limiting action of the limiting column, the movable block 6 moves downward along the threaded rod 5, and the movable block 6 drives the push plate 7 to deflect, so that the movable plate 17 drives the first moving block 8, the second moving block 9 and the third moving block 10 to push the sealing plate 11 to move to the outside of the mounting plate 2 through the moving port, so that the sealing plate 11 blocks the sealing strip and the door body 1 again, which is convenient for improving the sealing performance and preventing the sealing strip from being damaged after long-term use, resulting in a gap between the door body 1 and the door frame, causing leakage, thereby affecting the use of the cold storage. The anti-collision structure is installed through the first mounting groove and the second mounting groove. When the door body 1 and the mounting plate 2 are closed, the anti-collision structure is used for buffering to prevent the door body 1 from colliding with the door frame at too fast a speed when closing, causing damage to the insulation door, which is inconvenient to use.

[0029] like Figure 1 to Figure 2 As shown, the observation window 3 is located at the top of the mounting plate 2 and one end of the door body 1, a cleaning structure 12 is arranged on the outside of the observation window 3 on one side of the mounting plate 2, a handle 13 is arranged on the front side of the door body 1, on one side of the mounting plate 2 and at the bottom of the observation window 3, and the cleaning structure 12 is located on the top of the handle 13.

[0030] The handle 13 facilitates opening the door body 1, and the cleaning structure 12 is used to clean the observation window 3, thereby preventing the door body 1 from encountering external air after opening, and preventing the observation window 3 from generating water vapor when there is a large temperature difference between the inside and the outside, thereby affecting the observation effect of the observation window 3, and the water vapor dripping onto the mounting plate 2 will affect the use of the cooling and heat-insulating door.

[0031] like Figures 3 to 7 As shown, the motor 4 is fixedly installed on the inner wall of one side of the groove, the threaded rod 5 passes through the groove and extends to the inside of the movable groove, and one end thereof is slidably connected to the inner wall of the movable groove, the limiting columns are located on both sides of the threaded rod 5, and the threaded rod 5 is fixedly installed on the inner wall of the movable groove away from the end of the motor 4, the first movable block 8, the second movable block 9 and the third movable block 10 are all movably connected to the inner wall of the movable groove, the sealing plate 11 is located inside the movable opening, the push plates 7 on the left and right sides of the movable plate 17 are the same length, the length of the movable plate 17 on the upper side of the movable plate 17 is smaller than the length of the push plate 7 on the lower side of the movable plate 17, the shape of the third movable block 10 is U-shaped, and the observation window 3 is located in the middle of the U-shaped plate.

[0032] The groove makes it easy to install the motor 4, and the motor 4 drives the threaded rod 5 to rotate. The movable plate 17 moves along the threaded rod 5, so that the push plate 7 deflects and pushes the first moving block 8, the second moving block 9 and the third moving block 10 to move along the inner wall of the moving groove toward the moving mouth. The push plates 7 of different lengths can be used to connect the first moving block 8, the second moving block 9 and the third moving block 10, so that the sealing plate 11 can be moved out of the outside of the installation plate 2 at the same time, and the sealing strip and the door body 1 are sealed again, thereby further improving the sealing performance.

[0033] like Figures 5 to 8 As shown, the anti-collision structure includes a movable rod 14, a fixed rod 15 is fixedly installed at the bottom of the movable rod 14, a slider 16 is movably connected to one end of the movable rod 14, a movable plate 17 is hinged at the bottom of one side of the slider 16, a connecting block 18 is hinged at one end of the movable plate 17, a first anti-collision plate 19 is fixedly installed on one side of the connecting block 18, and a connecting spring 20 is fixedly installed on the other side, one end of the connecting spring 20 is fixedly installed on one side of the fixed rod 15, a connecting rod 21 is fixedly installed on one side of the first anti-collision plate 19, and a second anti-collision plate 22 is fixedly installed on one end of the connecting rod 21.

[0034] When the door body 1 and the mounting plate 2 are closed, the first anti-collision plate 19 and the second anti-collision plate 22 are squeezed by the door frame to buffer them, and the first anti-collision plate 19 and the second anti-collision plate 22 move toward the first mounting groove and the second mounting groove respectively. When the first anti-collision plate 19 moves, it drives the connecting block 18 to move along the inner wall of the first mounting groove, so that the movable plate 17 deflects and drives the slider 16 to move upward along the movable rod 14. At the same time, the connecting spring 20 is compressed, and under the action of the connecting rod 21, the first anti-collision plate 19 and the second anti-collision plate 22 move to the inside of the first mounting groove and the second mounting groove at the same time, which is convenient for buffering the door body 1 and the mounting plate 2, and for improving the service life of the door body 1.

[0035] like Figures 5 to 8 As shown, the top end of the movable rod 14 and the bottom end of the fixed rod 15 are both fixedly installed inside the first mounting groove, and the side away from the movable plate 17 is slidably connected to the inner wall of the first mounting groove, and both sides of the connecting block 18 are slidably connected to the inner wall of the first mounting groove, one end of the first anti-collision plate 19 is located inside the first mounting groove, and the other end is located outside the sealing plate 11, the connecting rod 21 extends to the inside of the second mounting groove through the movable opening, one end of the second anti-collision plate 22 is located on the inner wall of the second mounting groove, and the other end is located on one side of the door body 1, and the second anti-collision plate 22 is fixedly installed with a fixed spring 23 close to the second mounting groove, and one end of the fixed spring 23 is fixedly installed to the inner wall of the second mounting groove.

[0036] The movable rod 14 and the fixed rod 15 are installed through the first mounting groove. When the two sides of the first anti-collision plate 19 move toward the inside of the first mounting groove along the inner wall of the first mounting groove, the connecting block 18 drives the connecting spring 20 to be compressed, and drives the second anti-collision plate 22 to move along the movable opening through the connecting rod 21. At the same time, the second anti-collision plate 22 moves along the inner wall of the second mounting groove to compress the fixed spring 23, thereby facilitating the buffering of the force applied to the second anti-collision plate 22 again, thereby facilitating the improvement of the service life of the first anti-collision plate 19 and the second anti-collision plate 22.

[0037] like Figure 2 , Fig. 9 As shown, the cleaning structure 12 includes a mounting block 121, one side of the mounting block 121 is fixedly mounted to one side of the mounting plate 2, the inner walls on both sides of the mounting block 121 are slidably connected with connecting plates 122, and the connecting plates 122 are fixedly connected to the cleaning blocks 123 on the adjacent sides, and an electric push rod 124 is fixedly mounted inside the mounting block 121 located at the top of the handle 13, and the top of the electric push rod 124 is fixedly mounted to the connecting plate 122.

[0038] The mounting block 121 facilitates the protection of the connecting plate 122 and the electric push rod 124. The electric push rod 124 pushes the connecting plate 122 to move up and down along the inner wall of the mounting block 121. The connecting plate 122 drives the cleaning block 123 to move up and down to clean the observation window 3. When the door body 1 is opened and closed again, the water vapor generated on the observation window 3 is cleaned to prevent the observation window 3 from being affected and making it inconvenient to observe.

[0039] like Figures 8 to 9 As shown, a through hole is opened on one side of the sealing plate 11 on the right side of the mounting plate 2, and the through hole passes through one side of the mounting plate 2. The slider 16 is arranged corresponding to the through hole, and a first magnetic block 24 is fixedly installed on the side of the slider 16 opposite to the through hole, and a second magnetic block 25 is magnetically connected to one side of the first magnetic block 24, and a moving rod 26 is fixedly installed on one side of the second magnetic block 25, and a limiting block 27 is fixedly installed on one side of the moving rod 26, a pressing block 28 is fixedly installed on the top of the limiting block 27, and a button 29 is fixedly installed on the bottom of the electric push rod 124.

[0040] When the door body 1 is closed, the first anti-collision plate 19 moves toward the inside of the first mounting groove, the movable plate 17 deflects and pushes the slider 16 to move upward, and the slider 16 drives the first magnetic block 24 and the second magnetic block 25 to move upward, so that the moving rod 26 drives the limiting block 27 and the pressing block 28 to move along the mounting block 121, so that the pressing block 28 presses the button 29, thereby retracting the electric push rod 124, so that the electric push rod 124 drives the connecting plate 122 and the cleaning block 123 to move downward, and the observation window 3 is cleaned. When the door is opened, under the action of the fixing spring 23 and the connecting spring 20, the first anti-collision plate 19 and the second anti-collision plate 22 move out of the first installation slot and the second installation slot, the first anti-collision plate 19 drives the connecting block 18 to move so that the movable plate 17 deflects, the slider 16 drives the first magnetic block 24 and the second magnetic block 25 to move downward, the moving rod 26 drives the limiting block 27 and the pressing block 28 to separate from the button 29, and the electric push rod 124 and the connecting plate 122 and the cleaning block 123 move to the original position, so as to facilitate cleaning next time.

[0041] like Figure 2 , Figure 8 , Fig. 9 As shown, the mounting block 121 is located on both sides of the observation window 3, the cleaning block 123 and the connecting plate 122 are located on the top of the observation window 3, the limiting block 27 and the pressing block 28 are located inside the mounting block 121, one side of the limiting block 27 is slidably connected to the inner wall of the mounting block 121, the pressing block 28 is located at the bottom of the button 29, and the moving rod 26 extends through the through hole to the inside of the first mounting groove.

[0042] The mounting blocks 121 on both sides of the observation window 3 facilitate the connecting plate 122 to drive the cleaning block 123 to move from both sides of the observation window 3, so that the cleaning block 123 moves downward from the top of the observation window 3 to clean the observation window 3. The movement of the slider 16 drives the movement of the first magnetic block 24, the second magnetic block 25 and the moving rod 26, so that the limiting block 27 can drive the pressing block 28 to move up and down, thereby facilitating the start and close of the electric push rod 124. When the door body 1 is closed, the cleaning block 123 cleans the observation window 3. After the door body 1 is opened, the cleaning block 123 returns to the top of the observation window 3, so that it is convenient for repeated use.

[0043] Working principle: When in use, after the door body 1 is closed, the first anti-collision plate 19 and the second anti-collision plate 22 are squeezed by the door frame to buffer them, and the first anti-collision plate 19 and the second anti-collision plate 22 move to the inside of the first mounting groove and the second mounting groove respectively. When the first anti-collision plate 19 moves, it drives the connecting block 18 to move along the inner wall of the first mounting groove, so that the movable plate 17 deflects and drives the slider 16 to move upward along the movable rod 14. At the same time, the connecting spring 20 is compressed, and under the action of the connecting rod 21, the first anti-collision plate 19 and the second anti-collision plate 22 move to the inside of the first mounting groove and the second mounting groove at the same time, and the fixing spring 23 is compressed, which is in conflict with the door body 1 and the mounting plate 2. Buffering is performed, and at the same time, the sealing strip at the door frame fits with the door body 1 to block the gap between the door body 1 and the door frame, and then the motor 4 is started, so that the motor 4 drives the threaded rod 5 and the movable plate 17 to rotate along the inner wall of the movable groove. Under the limiting action of the limiting column, the movable block 6 moves downward along the threaded rod 5, and the movable block 6 drives the push plate 7 to deflect, so that the movable plate 17 drives the first movable block 8, the second movable block 9 and the third movable block 10 to move along the movable groove, and pushes the sealing plate 11 to move through the movable port to the outside of the mounting plate 2, so that the sealing plate 11 seals the sealing strip and the door body 1 again, so as to improve the sealing performance of the door body 1 after closing, thereby facilitating use.

[0044] When the door body 1 is closed, the first anti-collision plate 19 moves toward the inside of the first mounting groove, the movable plate 17 deflects and pushes the slider 16 to move upward, and the slider 16 drives the first magnetic block 24 and the second magnetic block 25 to move upward, so that the moving rod 26 drives the limiting block 27 and the pressing block 28 to move along the mounting block 121, so that the pressing block 28 presses the button 29, thereby retracting the electric push rod 124, so that the electric push rod 124 drives the connecting plate 122 and the cleaning block 123 to move downward, and the observation window 3 is cleaned. When the door is opened, under the action of the fixing spring 23 and the connecting spring 20, the first anti-collision plate 19 and the second anti-collision plate 22 move out of the first installation slot and the second installation slot, the first anti-collision plate 19 drives the connecting block 18 to move so that the movable plate 17 deflects, the slider 16 drives the first magnetic block 24 and the second magnetic block 25 to move downward, the moving rod 26 drives the limiting block 27 and the pressing block 28 to separate from the button 29, and the electric push rod 124 and the connecting plate 122 and the cleaning block 123 move to the original position, so as to facilitate cleaning next time.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A heat-insulating door body (1) for an ultra-low temperature cold storage, comprising a door body (1), characterized in that: A mounting plate (2) is arranged at the rear side of the door body (1), an observation window (3) is arranged at one side of the door body (1), a groove is arranged inside the mounting plate (2), a movable groove is arranged on one side of the groove and located on the door side, a movable opening is arranged on the outer side of the mounting plate (2), a motor (4) is arranged inside the groove, a threaded rod (5) is connected to the output end of the motor (4) in a transmission manner, a movable block (6) is threadedly connected to one end of the threaded rod (5), limiting columns are slidably connected to both ends of the movable plate (17), a push plate (7) is hinged at the top of the movable plate (17), and the push plates (7) located on the left and right sides of the movable plate (17) are connected to the movable plate (17). A first moving block (8) is hinged at one end of the push plate (7) located on the upper side of the movable plate (17), a second moving block (9) is hinged at one end of the push plate (7) located on the lower side of the movable plate (17), a third moving block (10) is hinged at one end of the push plate (7) located on the lower side of the movable plate (17), the first moving block (8), the second moving block (9) and the third moving block (10) are fixedly connected to one side with a sealing plate (11), a first mounting groove is provided inside the right side of the sealing plate (11), a second mounting groove is provided on one side of the door body (1), a movable opening is provided on the side of the door body (1) close to the mounting plate (2), and anti-collision structures are provided inside the first mounting groove and the second mounting groove.

2. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 1, characterized in that: The observation window (3) is located at the top of one end of the mounting plate (2) and the door body (1); a cleaning structure (12) is provided on the outside of the observation window (3) on one side of the mounting plate (2); a handle (13) is provided on the front side of the door body (1), on one side of the mounting plate (2) and at the bottom of the observation window (3); and the cleaning structure (12) is located on the top of the handle (13).

3. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 1, characterized in that: The motor (4) is fixedly mounted on the inner wall of one side of the groove, the threaded rod (5) passes through the groove and extends into the interior of the movable groove, and one end thereof is slidably connected to the inner wall of the movable groove, the limiting columns are located on both sides of the threaded rod (5), and the end of the threaded rod (5) away from the motor (4) is fixedly mounted on the inner wall of the movable groove, the first movable block (8), the second movable block (9) and the third movable block (10) are all movably connected to the inner wall of the movable groove, and the sealing plate (11) is located inside the movable opening.

4. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 1, characterized in that: The push plates (7) on the left and right sides of the movable plate (17) are of the same length, the length of the movable plate (17) on the upper side of the movable plate (17) is shorter than the length of the push plate (7) on the lower side of the movable plate (17), the shape of the third moving block (10) is U-shaped, and the observation window (3) is located in the middle of the U-shaped plate.

5. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 1, characterized in that: The anti-collision structure comprises a movable rod (14), a fixed rod (15) is fixedly installed at the bottom of the movable rod (14), one end of the movable rod (14) is movably connected to a slider (16), a movable plate (17) is hingedly connected to the bottom of one side of the slider (16), one end of the movable plate (17) is hingedly connected to a connecting block (18), one side of the connecting block (18) is fixedly installed with a first anti-collision plate (19), and the other side of the connecting block (18) is fixedly installed with a connecting spring (20), one end of the connecting spring (20) is fixedly installed with one side of the fixed rod (15), one side of the first anti-collision plate (19) is fixedly installed with a connecting rod (21), and one end of the connecting rod (21) is fixedly installed with a second anti-collision plate (22).

6. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 5, characterized in that: The top end of the movable rod (14) and the bottom end of the fixed rod (15) are both fixedly mounted inside the first mounting groove, and are slidably connected to the inner wall of the first mounting groove on the side away from the movable plate (17). Both sides of the connecting block (18) are slidably connected to the inner wall of the first mounting groove. One end of the first anti-collision plate (19) is located inside the first mounting groove, and the other end is located outside the sealing plate (11). The connecting rod (21) extends through the movable opening to the inside of the second mounting groove. One end of the second anti-collision plate (22) is located on the inner wall of the second mounting groove, and the other end is located on one side of the door body (1). A fixed spring (23) is fixedly mounted on the second anti-collision plate (22) close to the second mounting groove, and one end of the fixed spring (23) is fixedly mounted to the inner wall of the second mounting groove.

7. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 2, characterized in that: The cleaning structure (12) comprises a mounting block (121), one side of the mounting block (121) is fixedly mounted on one side of the mounting plate (2), the inner walls on both sides of the mounting block (121) are slidably connected to connecting plates (122), the adjacent sides of the connecting plates (122) are fixedly connected to cleaning blocks (123), an electric push rod (124) is fixedly mounted inside the mounting block (121) located at the top of the handle (13), and the top end of the electric push rod (124) is fixedly mounted to the connecting plate (122).

8. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 7, characterized in that: A through hole is provided on one side of the sealing plate (11) on the right side of the mounting plate (2), and the through hole penetrates one side of the mounting plate (2). The slider (16) is arranged corresponding to the through hole. A first magnetic block (24) is fixedly installed on the side of the slider (16) opposite to the through hole. A second magnetic block (25) is magnetically connected to one side of the first magnetic block (24). A moving rod (26) is fixedly installed on one side of the second magnetic block (25). A limiting block (27) is fixedly installed on one side of the moving rod (26). A push block (28) is fixedly installed on the top of the limiting block (27). A button (29) is fixedly installed on the bottom of the electric push rod (124).

9. The heat-insulating door body (1) of an ultra-low temperature cold storage according to claim 8, characterized in that: The mounting block (121) is located on both sides of the observation window (3); the cleaning block (123) and the connecting plate (122) are located on the top of the observation window (3); the limiting block (27) and the pressing block (28) are located inside the mounting block (121); one side of the limiting block (27) is slidably connected to the inner wall of the mounting block (121); the pressing block (28) is located at the bottom of the button (29); and the moving rod (26) passes through the through hole and extends to the inside of the first mounting groove.

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