Automatic lifting and closing device for shielding door

Abstract

The present invention discloses an automatic lifting and closing device for a shielding door, which belongs to the technical field of shielding door sealing. The automatic lifting and closing device for a shielding door comprises a mounting mechanism installed in a bottom groove of a shielding door body, wherein a first slide rail and a second slide rail are respectively arranged inside the mounting mechanism; a first slider and a second slider are respectively slidably connected to the bottom of the first slide rail and the second slide rail, a movable rod is fixedly connected to one side of the first slide rail, and a contact is fixedly connected to the other end of the movable rod; a pushing mechanism is installed between the first slide rail and the second slide rail. The present invention designs a pushing mechanism, a connecting rod mechanism and a closing mechanism, so that the device can automatically perform lifting and lowering processing without manual intervention by the user, and prevents the sealing strip from being damaged by long-term friction with the ground, greatly improving the service life of the sealing strip, and at the same time improving the sealing performance of the closing device.

Description

Technical Field

[0001] The invention belongs to the technical field of shielding door sealing, and in particular relates to an automatic lifting and closing device for a shielding door. Background Art

[0002] Shielded doors are access control devices that can control the passage of people. They are managed and controlled by mechanical or electronic systems, allowing only authenticated people to enter, and preventing the leakage or spread of radiation, electromagnetic waves or other dangerous substances. At present, shielded doors are mainly divided into the following categories: Radiation protection: mainly used in nuclear energy facilities, medical radiotherapy rooms, laboratories and other places where radiation leakage needs to be prevented. Shielded doors can effectively block radiation and ensure the safety of the environment inside and around; Material isolation: In addition to radiation, it is sometimes used to block other dangerous substances, such as chemicals or biohazardous substances, to protect people from their influence; Strict control of entry and exit: Shielded doors are usually equipped with strict entry and exit control systems, which may include identity authentication, licenses and access control devices to ensure that only authorized people or items can pass; Subway stations: Shielded doors are set up at the entrances and exits of subway stations, transfer passages and other locations for security management and control.

[0003] In order to improve the sealing performance of the shielding door, a sealing strip is usually installed at the bottom or top of the shielding door. Since the shielding door needs to move the sealing strip when it is opened or closed, the sealing strip will slide against the ground, and the surface of the sealing strip may be worn or damaged due to friction, thereby affecting its sealing performance. At the same time, the sealing strips on the existing shielding doors are all fixedly installed, and each replacement requires the entire shielding door to be disassembled, which is extremely cumbersome. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide an automatic lifting and closing device for a shielding door.

[0005] The technical solution adopted to solve the above technical problems is: an automatic lifting and closing device for a shielding door, comprising a mounting mechanism installed in a bottom groove of a shielding door body, wherein a first slide rail and a second slide rail are respectively arranged inside the mounting mechanism;

[0006] The first slide rail and the second slide rail are slidably connected to the bottom thereof respectively with a first slider and a second slider, one side of the first slide rail is fixedly connected to a movable rod, and the other end of the movable rod is fixedly connected to a contact;

[0007] A pushing mechanism is installed between the first slide rail and the second slide rail, a connecting rod mechanism is installed at the bottom of the first slide rail and the second slide rail, and a closing mechanism is installed at the bottom between the two connecting rod mechanisms.

[0008] Furthermore, the mounting mechanism includes a mounting frame, one side of the mounting frame is fixedly connected with a fixed mounting plate, the other side of the mounting frame is detachably mounted with a movable mounting plate, two first bolts are installed between the fixed mounting plate and the movable mounting plate and the shielding door body, and two second bolts are installed between one side of the top inner surface of the mounting frame and the shielding door body.

[0009] Through the above technical solution, when the user installs the entire lifting and closing device, it is necessary to install and fix it through the installation mechanism. Since the installation frame and the fixed installation plate are integrated, the installation frame is first inserted into the bottom groove of the shielding door body, and the fixed installation plate is aligned with the installation opening on one side of the shielding door body. First, the fixed installation plate is fixed to one side of the shielding door body through two of the first bolts, and then the installation frame is fixed to the bottom of the shielding door body through two second bolts. Then, the movable installation plate is aligned with the installation opening on the other side of the shielding door body and is put on the other side of the installation frame. Then, the movable installation plate is fixed to the other side of the shielding door body through another two first bolts to achieve installation and fixation of the entire lifting and closing device.

[0010] Furthermore, the installation frame and the fixed installation piece are designed as an integrated structure.

[0011] Through the above technical solution, it is convenient for the user to insert the installation frame and the fixed installation piece into the bottom groove of the shielding door body, thereby facilitating installation and fixing.

[0012] Furthermore, the tops of the first slide rail and the second slide rail are fixedly connected to the top inner surface of the installation frame, and the contacts penetrate through the movable installation piece.

[0013] Through the above technical solution, when the movable mounting plate needs to be disassembled later, it is only necessary to remove the two first bolts connected thereto, and the movable mounting plate can be easily disassembled, which is convenient for the subsequent replacement of parts in the closing mechanism. At the same time, the movable mounting plate has a dustproof effect and improves the sealing of the mounting mechanism.

[0014] Furthermore, the pushing mechanism includes a first push rod fixedly connected to the other side of the first slide rail, a first fixed block is fixedly connected to the top inner surface of the mounting frame and close to the position between the first slide rail and the second slide rail, a first spring is fixedly installed between the first slider and the first fixed block, a second push rod is fixedly connected to the other side of the second slider, a second fixed block is fixedly connected to the top inner surface of the mounting frame and close to the other end of the second push rod, and a second spring is fixedly installed between the second slider and the second fixed block.

[0015] Through the above technical scheme, when the shielding door body is slowly closed, the contact at this time slowly contacts the inner surface of the door frame, and the contact is squeezed and retracted toward the inner end. When the shielding door body is completely closed, the contact is completely retracted into the inside of the installation frame. When the contact retracts, the movable rod pushes the first slider, which pushes the first push rod, which pushes the second slider, which pushes the second push rod, which pushes the first slider and the second slider to push the connecting rod mechanism, thereby driving the closing mechanism to move downward. When the shielding door body is opened, the door frame does not squeeze the contact. At this time, the two second springs drive the first slider and the second slider to reset respectively due to the elastic force, thereby driving the movable rod to reset, so that the movable rod drives the contact to reset, and then drives the connecting rod mechanism to reset, and then drives the closing mechanism to move upward. Through the closing and opening of the shielding door body, the closing mechanism automatically realizes the lifting and lowering processing, without the need for manual operation by the user, and has strong practicality.

[0016] Furthermore, the other end of the first push rod passes through the first fixed block and is fixedly connected to one side of the second sliding block, and the other end of the second push rod passes through the second fixed block. When the movable rod is pushed, the first sliding block slides at the bottom of the first sliding rail.

[0017] Through the above technical solution, when the first push rod is pushed, the second slider slides at the bottom of the second slide rail, and the first push rod penetrates the first fixed block to play a limiting role. At the same time, when the second push rod slides, it penetrates the second fixed block to play a limiting role, which greatly improves the stability of the pushing mechanism during movement.

[0018] Furthermore, the connecting rod mechanism includes two main connecting rods which are rotatably connected to the bottom of the first fixed block and the second fixed block respectively, the bottom of the first slider and the second slider are respectively rotatably connected to the secondary connecting rods, one end of the two secondary connecting rods are respectively rotatably connected to the corresponding center position of the main connecting rod, and the other ends of the two main connecting rods are fixedly connected with a penetrating limit pin.

[0019] Through the above technical solution, when the first slider and the second slider move, they respectively push the secondary connecting rod connected thereto, causing the secondary connecting rod to rotate downward, thereby driving the connected main connecting rod to rotate downward, and then driving the connected limit pin to slide in the corresponding limit groove.

[0020] Furthermore, one end of the two secondary connecting rods is rotatably connected to the center position of the corresponding main connecting rod.

[0021] Through the above technical solution, the rotation of the two auxiliary connecting rods drives the corresponding main connecting rods to rotate respectively.

[0022] Furthermore, the closing mechanism includes a lifting frame arranged inside the installation frame, a through installation groove is opened on one side of the lifting frame, two notches are opened on the top of the lifting frame, and through limiting grooves are opened at the front and rear ends of the lifting frame and near the two installation grooves, and a rubber sealing strip is inserted in the installation groove.

[0023] Through the above technical scheme, when the two limit pins slide in the corresponding limit grooves respectively, when the shielding door body is slowly closed, the two main connecting rods continue to rotate downward, and at this time the limit pins slowly move toward the other end in the corresponding limit grooves, and slowly push the lifting frame downward during the movement until the shielding door body is completely closed, the lifting frame moves downward to the lowest point, and the rubber sealing strip also contacts the ground. When the shielding door body is slowly opened, under the action of the pushing mechanism and the connecting rod mechanism, the rubber sealing strip slowly moves upward, so that the closing mechanism can realize automatic lifting and lowering, preventing the rubber sealing strip from being damaged by long-term friction with the ground, greatly improving the service life of the rubber sealing strip, and then improving the sealing of the lifting and closing device.

[0024] Furthermore, the two limit pins are slidably connected to the corresponding limit grooves respectively.

[0025] Through the above technical scheme, when the limit pin slides to the other end in the limit groove and under the rotation trajectory of the main connecting rod, the limit pin pushes the lifting frame downward while sliding, thereby driving the rubber sealing strip to move downward. When the staff needs to replace the rubber sealing strip later, they pull one end of the rubber sealing strip to pull the rubber sealing strip out of the installation groove. When installing a new rubber sealing strip, squeeze the installation strip on the top of the rubber sealing strip to reduce the area, and quickly insert it into the installation groove. Under the elastic action of the rubber material, the installation strip on the top of the rubber sealing strip slowly resets and fits with the inner wall of the installation groove, thereby realizing the replacement and installation of the rubber sealing strip, and the operation is simple.

[0026] The beneficial effects of the present invention are as follows: (1) The present invention designs a pushing mechanism, a connecting rod mechanism and a closing mechanism. When the shielding door is opened, the lateral movement of the pushing mechanism drives the connecting rod mechanism to rotate downward, and the closing mechanism is driven to move downward under the cooperation of the limit pin and the limit groove. When the shielding door is closed, the closing mechanism is moved upward in the same way under the linkage cooperation of the pushing mechanism, the connecting rod mechanism and the closing mechanism, so that the device can be automatically raised and lowered without manual intervention by the user, and the sealing strip is prevented from being damaged by long-term friction with the ground, which greatly improves the service life of the sealing strip and improves the sealing performance of the closing device. (2) The present invention designs an installation mechanism. The closing device can be quickly installed in the bottom groove of the shielding door through the installation mechanism, and the installation operation is simple. When the sealing strip needs to be replaced later, it only needs to remove the two first bolts connected to the movable installation plate in the installation mechanism, and the movable installation plate can be easily removed, so that the sealing strip can be quickly replaced. The operation is simple, and regular replacement improves the sealing performance of the closing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall installation structure of the present invention;

[0028] Figure 2 It is the overall installation front view of the present invention;

[0029] Figure 3 is an exploded view of the mounting mechanism of the present invention;

[0030] Figure 4 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 5 is an overall cross-sectional view of the present invention;

[0032] Figure 6 It is a schematic diagram of a partial mechanism structure of the present invention;

[0033] Figure 7 It is a schematic diagram of the connecting rod mechanism structure of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the first slide rail and the first slider of the present invention;

[0035] Fig. 9 It is a schematic diagram of the sealing mechanism structure of the present invention;

[0036] Fig.10 for Figure 3 A partial enlarged view of the middle A;

[0037] Fig.11 for Fig. 9 A partial enlarged view of point B in the middle.

[0038] 1. Shielding door body; 2. Mounting mechanism; 201. Mounting frame; 202. Fixed mounting plate; 203. Movable mounting plate; 204. First bolt; 205. Second bolt; 3. First slide rail; 4. Second slide rail; 5. First slider; 6. Second slider; 7. Movable rod; 8. Contact; 9. Pushing mechanism; 901. First push rod; 902. First fixed block; 903. First spring; 904. Second push rod; 905. Second fixed block; 906. Second spring; 10. Link mechanism; 1001. Main link; 1002. Secondary link; 1003. Limit pin; 11. Closing mechanism; 1101. Lifting frame; 1102. Mounting groove; 1103. Notch; 1104. Limit groove; 1105. Rubber sealing strip. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] like Figure 1-Figure 11As shown, an automatic lifting and closing device for a shielding door of the present embodiment comprises a mounting mechanism 2 mounted in a bottom groove of a shielding door body 1, the mounting mechanism 2 comprises a mounting frame 201, a fixed mounting piece 202 is fixedly connected to one side of the mounting frame 201, a movable mounting piece 203 is detachably mounted on the other side of the mounting frame 201, two first bolts 204 are mounted between the fixed mounting piece 202 and the movable mounting piece 203 and the shielding door body 1, two second bolts 205 are mounted between one side of the top inner surface of the mounting frame 201 and the shielding door body 1, when a user installs the entire lifting and closing device, it is necessary to install and fix it through the mounting mechanism 2, since the mounting frame 201 and the fixed mounting piece 202 are integrated, the mounting frame 201 is first inserted into the bottom groove of the shielding door body 1, and the fixed mounting piece 202 is aligned with a mounting opening on one side of the shielding door body 1, firstly, the fixed mounting piece 202 is fixed to one side of the shielding door body 1 by two of the first bolts 204, and then the two second bolts 205 are mounted. The bolt 205 fixes the installation frame 201 to the bottom of the shielding door body 1, and then aligns the movable installation piece 203 with the installation opening on the other side of the shielding door body 1, and puts it on the other side of the installation frame 201, and then fixes the movable installation piece 203 to the other side of the shielding door body 1 through the other two first bolts 204, so as to realize the installation and fixation of the entire lifting and closing device. The installation frame 201 and the fixed installation piece 202 are designed as an integrated structure, which is convenient for the user to insert the installation frame 201 and the fixed installation piece 202 into the bottom groove of the shielding door body 1, thereby facilitating installation and fixation. The tops of the first slide rail 3 and the second slide rail 4 are fixedly connected to the top inner surface of the installation frame 201, and the contact 8 passes through the movable installation piece 203. When the movable installation piece 203 needs to be disassembled later, it is only necessary to remove the two first bolts 204 connected thereto, so that the movable installation piece 203 can be easily disassembled, which is convenient for the subsequent replacement of parts in the closing mechanism 11. At the same time, the movable installation piece 203 has a dustproof effect and improves the sealing performance of the installation mechanism 2.

[0041] like Figure 1-Figure 8As shown, the interior of the mounting mechanism 2 is respectively provided with a first slide rail 3 and a second slide rail 4, the bottom of the first slide rail 3 and the second slide rail 4 are respectively slidably connected with a first slider 5 and a second slider 6, one side of the first slide rail 3 is fixedly connected with a movable rod 7, the other end of the movable rod 7 is fixedly connected with a contact 8, a pushing mechanism 9 is installed between the first slide rail 3 and the second slide rail 4, the pushing mechanism 9 includes a first push rod 901 fixedly connected to the other side of the first slide rail 3, a first fixed block 902 is fixedly connected to the top inner surface of the mounting frame 201 and close to the position between the first slide rail 3 and the second slide rail 4, and the first slider 5 is fixedly installed with the first fixed block 902. There is a first spring 903, a second push rod 904 is fixedly connected to the other side of the second slider 6, a second fixed block 905 is fixedly connected to the top inner surface of the mounting frame 201 and close to the other end of the second push rod 904, and a second spring 906 is fixedly installed between the second slider 6 and the second fixed block 905. When the shielding door body 1 is slowly closed, the contact 8 slowly contacts the inner surface of the door frame, and the contact 8 is squeezed and retracted toward the inner end. When the shielding door body 1 is completely closed, the contact 8 is completely retracted into the interior of the mounting frame 201. When the contact 8 is retracted, the movable rod 7 is pushed, so that the movable rod 7 pushes the first slider 5, so that the first slider 5 The first push rod 901 is pushed, so that the first push rod 901 pushes the second slider 6, so that the second slider 6 pushes the second push rod 904, so that the first slider 5 and the second slider 6 push the connecting rod mechanism 10, and then drive the closing mechanism 11 to move downward. When the shielding door body 1 is opened, the door frame does not squeeze the contact 8. At this time, the two second springs 906 respectively drive the first slider 5 and the second slider 6 to reset due to the elastic force, thereby driving the movable rod 7 to reset, so that the movable rod 7 drives the contact 8 to reset, and then drives the connecting rod mechanism 10 to reset, and then drives the closing mechanism 11 to move upward. By closing and opening the shielding door body 1, the closing mechanism 11 is The mechanism 11 automatically realizes the lifting and lowering processing without the need for manual operation by the user, and is highly practical. The other end of the first push rod 901 passes through the first fixed block 902 and is fixedly connected to one side of the second sliding block 6. The other end of the second push rod 904 passes through the second fixed block 905. When the movable rod 7 is pushed, the first sliding block 5 slides at the bottom of the first slide rail 3. When the first push rod 901 is pushed, the second sliding block 6 slides at the bottom of the second slide rail 4. The first push rod 901 passes through the first fixed block 902 to play a limiting role. At the same time, when the second push rod 904 slides, it passes through the second fixed block 905 to play a limiting role, which greatly improves the stability of the pushing mechanism 9 during activity.

[0042] like Figure 1-Figure 7As shown, a connecting rod mechanism 10 is installed at the bottom of the first slide rail 3 and the second slide rail 4, and the connecting rod mechanism 10 includes two main connecting rods 1001 that are rotatably connected to the bottom of the first fixed block 902 and the second fixed block 905 respectively, and the bottom of the first slider 5 and the second slider 6 are respectively rotatably connected to the secondary connecting rods 1002, one end of the two secondary connecting rods 1002 is respectively rotatably connected to the corresponding center position of the main connecting rod 1001, and the other ends of the two main connecting rods 1001 are fixedly connected with a penetrating limit pin 1003. When the first slider 5 and the second slider 6 move, they respectively push the secondary connecting rod 1002 connected thereto, so that the secondary connecting rod 1002 rotates downward, thereby driving the connected main connecting rod 1001 to rotate downward, and then driving the connected limit pin 1003 to slide in the corresponding limit groove 1104.

[0043] like Figure 1-Figure 11As shown, a closing mechanism 11 is installed at the bottom between the two connecting rod mechanisms 10, and the closing mechanism 11 includes a lifting frame 1101 arranged inside the installation frame 201, a through installation groove 1102 is opened on one side of the lifting frame 1101, and two notches 1103 are opened on the top of the lifting frame 1101, and through limiting grooves 1104 are opened at the front and rear ends of the lifting frame 1101 and near the two installation grooves 1102, and a rubber sealing strip 1105 is inserted in the installation groove 1102. When the two limiting pins 1003 are respectively in the corresponding limiting grooves 1104, the sealing strip 1105 is inserted into the sealing strip 1105. When the shielding door body 1 is slowly closed, the two main connecting rods 1001 continue to rotate downward. At this time, the limit pin 1003 slowly moves toward the other end in the corresponding limit groove 1104, and slowly pushes the lifting frame 1101 downward during the movement. Until the shielding door body 1 is completely closed, the lifting frame 1101 moves downward to the lowest point, and the rubber sealing strip 1105 also contacts the ground. When the shielding door body 1 is slowly opened, under the action of the pushing mechanism 9 and the connecting rod mechanism 10, the rubber sealing strip 1105 slowly moves to the ground. The sealing mechanism 11 can be automatically lifted and lowered to prevent the rubber sealing strip 1105 from being damaged by long-term friction with the ground, which greatly improves the service life of the rubber sealing strip 1105 and further improves the sealing performance of the lifting and closing device. The two limit pins 1003 are respectively slidably connected with the corresponding limit grooves 1104. When the limit pin 1003 slides toward the other end in the limit groove 1104 and under the rotation track of the main connecting rod 1001, the limit pin 1003 pushes the lifting frame 1101 downward while sliding, thereby driving the rubber sealing strip 1105 to When the staff needs to replace the rubber sealing strip 1105 later, they pull one end of the rubber sealing strip 1105 to pull the rubber sealing strip 1105 out of the mounting groove 1102. When installing a new rubber sealing strip 1105, they squeeze the mounting strip on the top of the rubber sealing strip 1105 to reduce the area, and quickly insert it into the mounting groove 1102. Under the elastic effect of the rubber material, the mounting strip on the top of the rubber sealing strip 1105 slowly resets and fits with the inner wall of the mounting groove 1102, thereby realizing the replacement and installation of the rubber sealing strip 1105, and the operation is simple.

[0044] The working principle of this embodiment is as follows. When installing the lifting and closing device, since the installation frame 201 and the fixed installation piece 202 are integrated, the installation frame 201 is first inserted into the bottom groove of the shielding door body 1, and the fixed installation piece 202 is aligned with the installation opening on one side of the shielding door body 1. First, the fixed installation piece 202 is fixed to one side of the shielding door body 1 by two first bolts 204, and then the installation frame 201 is fixed to the bottom of the shielding door body 1 by two second bolts 205. Then, the movable installation piece 203 is aligned with the installation opening on the other side of the shielding door body 1 and is sleeved on the other side of the installation frame 201. Then, the movable installation piece 203 is fixed to the other side of the shielding door body 1 by another two first bolts 204, so as to achieve the installation and fixing of the entire lifting and closing device.

[0045] When the shielding door body 1 is slowly closed, the contact 8 at this time slowly contacts the inner surface of the door frame, and the contact 8 is squeezed and retracted toward the inner end, so that the contact 8 slowly retracts into the inside of the installation frame 201. At the same time, the contact 8 pushes the movable rod 7 when it retracts, so that the movable rod 7 pushes the first slider 5, so that the first slider 5 pushes the first push rod 901, so that the first push rod 901 pushes the second slider 6, so that the second slider 6 pushes the second push rod 904. When the first slider 5 and the second slider 6 move, they respectively push the secondary connecting rod 1002 connected thereto, so that the secondary connecting rod 1002 rotates downward, from The connected main connecting rod 1001 is driven to rotate downward, thereby driving the connected limiting pin 1003 to slide in the corresponding limiting groove 1104, so that the limiting pin 1003 slowly moves in the corresponding limiting groove 1104 toward the other end, and in the process of moving, slowly pushes the lifting frame 1101 downward, thereby driving the rubber sealing strip 1105 to move downward, until the shielding door body 1 is completely closed, the lifting frame 1101 moves downward to the lowest point, so that the rubber sealing strip 1105 also drops and contacts the ground, thereby realizing the automatic downward movement of the rubber sealing strip 1105;

[0046] When the shielding door body 1 is opened, the door frame does not squeeze the contact 8. At this time, the two second springs 906 respectively drive the first slider 5 and the second slider 6 to reset due to the elastic force, thereby driving the movable rod 7 to reset, so that the movable rod 7 drives the contact 8 to reset, and then drives the connecting rod mechanism 10 to reset, and then drives the rubber sealing strip 1105 to move upward, so that the rubber sealing strip 1105 automatically moves upward;

[0047] When the rubber sealing strip 1105 needs to be replaced, the two first bolts 204 connected thereto are removed, and the movable mounting piece 203 is then easily removed. One end of the rubber sealing strip 1105 is manually pulled to pull the rubber sealing strip 1105 out of the mounting groove 1102. When installing a new rubber sealing strip 1105, the mounting strip on the top of the rubber sealing strip 1105 is squeezed to reduce the area, and the new rubber sealing strip 1105 is quickly inserted into the mounting groove 1102. Under the elastic action of the rubber material, the mounting strip on the top of the rubber sealing strip 1105 is slowly reset and fits against the inner wall of the mounting groove 1102. The removed movable mounting piece 203 is then reinstalled to achieve replacement and installation of the rubber sealing strip 1105.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An automatic lifting and closing device for a shielding door, comprising a mounting mechanism (2) mounted in a bottom groove of a shielding door body (1), the mounting mechanism (2) comprising a mounting frame (201), one side of the mounting frame (201) being fixedly connected with a fixed mounting piece (202), the other side of the mounting frame (201) being detachably mounted with a movable mounting piece (203), two first bolts (204) being mounted between the fixed mounting piece (202) and the movable mounting piece (203) and the shielding door body (1), two second bolts (205) being mounted between one side of the top inner surface of the mounting frame (201) and the shielding door body (1), characterized in that: A first slide rail (3) and a second slide rail (4) are respectively provided inside the mounting mechanism (2); A first sliding block (5) and a second sliding block (6) are slidably connected to the bottom of the first sliding rail (3) and the second sliding rail (4), respectively; a movable rod (7) is fixedly connected to one side of the first sliding rail (3); and a contact (8) is fixedly connected to the other end of the movable rod (7); A pushing mechanism (9) is installed between the first slide rail (3) and the second slide rail (4), and the pushing mechanism (9) comprises a first push rod (901) fixedly connected to the other side of the first slide rail (3); a first fixed block (902) is fixedly connected to the top inner surface of the installation frame (201) and close to the position between the first slide rail (3) and the second slide rail (4); a first spring (903) is fixedly installed between the first slider (5) and the first fixed block (902); a second push rod (904) is fixedly connected to the other side of the second slider (6); a second fixed block (905) is fixedly connected to the top inner surface of the installation frame (201) and close to the other end of the second push rod (904); and a second spring (906) is fixedly installed between the second slider (6) and the second fixed block (905); A connecting rod mechanism (10) is installed at the bottom of each of the first slide rail (3) and the second slide rail (4), and the connecting rod mechanism (10) comprises two main connecting rods (1001) rotatably connected to the bottom of the first fixed block (902) and the second fixed block (905), respectively; the bottom of each of the first sliding block (5) and the second sliding block (6) is rotatably connected to a secondary connecting rod (1002), and the other ends of the two main connecting rods (1001) are fixedly connected to a through-going limit pin (1003); A closing mechanism (11) is installed at the bottom between the two connecting rod mechanisms (10), and the closing mechanism (11) comprises a lifting frame (1101) arranged inside the installation frame (201), a through installation groove (1102) is provided on one side of the lifting frame (1101), two notches (1103) are provided on the top of the lifting frame (1101), and through limiting grooves (1104) are provided at the front and rear ends of the lifting frame (1101) and near the two installation grooves (1102), and a rubber sealing strip (1105) is inserted into the installation groove (1102).

2. The automatic lifting and closing device of a shielding door according to claim 1, characterized in that: The installation frame (201) and the fixed installation plate (202) are of an integrated structural design.

3. The automatic lifting and closing device of a shielding door according to claim 1, characterized in that: The tops of the first slide rail (3) and the second slide rail (4) are fixedly connected to the top inner surface of the mounting frame (201), and the contact (8) passes through the movable mounting plate (203).

4. The automatic lifting and closing device of a shielding door according to claim 1, characterized in that: The other end of the first push rod (901) passes through the first fixed block (902) and is fixedly connected to one side of the second sliding block (6), and the other end of the second push rod (904) passes through the second fixed block (905).

5. The automatic lifting and closing device of a shielding door according to claim 1, characterized in that: One end of the two auxiliary connecting rods (1002) is respectively rotatably connected to the center position of the corresponding main connecting rod (1001).

6. The automatic lifting and closing device of a shielding door according to claim 1, characterized in that: The two limiting pins (1003) are respectively slidably connected to corresponding limiting grooves (1104).

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