Fireproof and radiation-proof door with floating threshold

Abstract

The fireproof and radiation-proof door comprises a door body and the floating doorsill, a U-shaped groove is formed in the bottom of the door body, positioning pieces horizontally moving along with the movement of the door are arranged in the U-shaped groove at intervals, the floating doorsill comprises a U-shaped groove body, wedge-shaped blocks in one-to-one correspondence with the positioning pieces are arranged in the U-shaped groove body, and the wedge-shaped blocks are arranged in the U-shaped groove body. When the door body moves to the position of the floating doorsill, the positioning piece is located on one side of the inclined face of the wedge block, and the floating doorsill is movably arranged in a doorsill installation groove in the ground. According to the fireproof and radiation-proof door, the sealing performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire and radiation protection doors, in particular to the threshold field of fire and radiation protection doors. Background Art

[0002] Fire and radiation protection doors are widely used in hospitals and the like. Most of the existing thresholds are fixed or are set to achieve the floating of the threshold through mechanical or external force application. In the case of a fixed threshold, in an emergency, a hospital bed or a wheelchair is likely to be blocked by the threshold and tip over. For the existing floating thresholds, there are technical problems such as complex transmission mechanisms, easy leakage of electric drive, complex maintenance, and high costs.

[0003] In the prior art, the patent application number CN202010572263 discloses a movable threshold structure of a civil air defense door. A vertical groove extending downward is opened on the ground, and a threshold adapted thereto slides in the vertical groove. A cavity is opened in the ground and communicated with the bottom of the vertical groove. A round roller is rotatably connected in the cavity. The round roller is in the shape of a horizontally placed cylinder. A horizontal cross bar slides between the round roller and the threshold. One end of the cross bar is in transmission connection with the threshold, and the other end is slidably connected inside the round roller. The horizontal sliding of the cross bar pushes the threshold to slide in the vertical groove. When a person steps on the end of the lever, the round roller rotates in the cavity, and the round roller pulls the cross bar to slide in the cavity. The threshold and its connection structure can be completely hidden in the ground when not in use, making the periphery of the protection door clean and not affecting normal use. By manually stepping on the lever, the threshold can be gradually slid out of the ground, and the threshold can slide out or retract by its own gravity. This technical solution has a complex structure, is laborious to step on manually, is prone to breakage, and is not easy to repair.

[0004] In the prior art, the patent application No. CN202122852177 discloses a protective isolation door for a radiology CT room, which includes a suspension track, an isolation door, a threshold plate and a control switch. The suspension track includes a housing, inside which a driving lead screw is rotatably connected. A movable seat is slidably connected to the surface of the driving lead screw. A connecting beam is slidably connected to the front of the movable seat. An electric push rod is fixedly connected to the front of the movable seat, and the movable end of the electric push rod is fixedly connected to the connecting beam. The upper surface of the isolation door is fixedly connected to the connecting beam, and a servo motor is fixedly connected to the end of the housing. By setting the movable seat and the electric push rod, the left and right movement of the movable seat drives the opening of the isolation door. At the same time, by using the lifting and lowering functions of the electric push rod, the isolation door can press down the threshold plate, reducing the gap between the isolation door and the ground. The threshold plate is flush with or slightly higher than the ground, which does not affect passage, improving the problem of a large gap between the isolation door and the ground and achieving the effect of isolating radiation. In this application, the electric push rod is used to drive the isolation door to adjust the height of the threshold plate. The thrust of the electric push rod is not easy to control. In addition, the threshold plate of this application is a soft connection through a spring. When the door is in the open state and a wheelchair or a hospital bed passes through the threshold plate, due to the action of gravity, the spring is compressed, and a height difference is formed between the threshold plate and the ground, which may cause obstruction to the rapidly passing wheelchair or hospital bed and make it prone to tipping over. Summary of the Invention

[0005] A fireproof and radiation-proof door provided with a floating threshold can overcome the defects in the above-mentioned background technology and has the characteristics of simple structure, easy maintenance, precise control, and smooth passage of hospital beds, wheelchairs or medical staff, etc.

[0006] The fireproof and radiation-proof door provided with a floating threshold includes a door body and a floating threshold. A U-shaped groove is provided at the bottom of the door body, and positioning members that move horizontally as the door moves are arranged at intervals in the U-shaped groove. The floating threshold includes a U-shaped groove body, and wedge-shaped blocks corresponding to the positioning members one by one are arranged in the U-shaped groove body. When the door body moves to the position of the floating threshold, the positioning members are located on one side of the inclined surface of the wedge-shaped block. The floating threshold is movably arranged in the threshold installation groove on the ground. When the door body is closed, as the door body slides, the positioning members push the wedge-shaped blocks, causing the wedge-shaped blocks to drive the U-shaped groove body of the floating threshold to fit with the U-shaped groove at the bottom of the door body in a concave-convex manner to achieve sealing. When the door body is opened, as the door body slides, under the action of gravity, the wedge-shaped blocks of the floating threshold descend along the positioning members to the same horizontal plane as the ground.

[0007] An upwardly bent floating threshold baffle is provided at the end of the top surface of the U-shaped groove body of the floating threshold to improve the fireproof sealing performance on the side of the door.

[0008] A lateral limiting device is provided at the position where the height of the inclined surface of the wedge-shaped body is less than or equal to the height of the U-shaped groove provided at the bottom of the door body to prevent the floating threshold from suddenly failing when it is in the floating state, resulting in the automatic falling of the floating threshold and thus weakening the fireproof and radiation-proof performance at the bottom.

[0009] The lateral limit device is arranged in the groove on one side of the inclined surface of the wedge block. The lateral limit device includes a trigger head, a connecting rod, a spring, a rotating shaft, a push rod and a clamp arm. One end of the connecting rod is connected to the trigger head, and the trigger head extends out of the groove. The other end of the connecting rod abuts against the side wall of the groove of the wedge block and is fixedly connected to one end of the push rod. The middle part of the connecting rod is rotatably connected through the rotating shaft. The other end of the push rod is fixedly connected with an elastic clamp arm. A spring is arranged at the corresponding position of the groove side wall and the trigger head. The spring pulls the groove wall and the connecting rod together. When the floating threshold rises to the position of pressing against the groove at the bottom of the door panel, the trigger head is touched by the side of the positioning piece, which drives the spring to compress and the connecting rod to rotate. The end of the connecting rod that fits the inner wall of the groove drives the push rod to push the elastic clamp arm outward, and the elastic clamp arm opens and tightens the rod body of the positioning rod. Thus, the height limit of the floating threshold is achieved.

[0010] The U-shaped groove and threshold of the floating threshold are made of a composite of stainless steel, lead plate and fireproof material, which is consistent with the material of the door body, ensuring the sealing performance of the bottom while improving the fireproof and radiationproof performance of the bottom.

[0011] Connecting arms fixedly connected to the positioning piece are arranged at intervals on the side walls of the U-shaped groove.

[0012] The positioning member is a positioning rod, a pulley, a roller or a ball is arranged at the end of the positioning rod, and a roller is arranged at the bottom of the positioning rod.

[0013] The floating threshold baffle is formed by bending the top surface of the U-shaped groove body of the floating threshold upwards in one piece.

[0014] Limiting grooves are set at both ends of the U-shaped groove at the bottom of the door body, and sliding bars extending out of the limiting grooves are set at both ends of the end surface of the U-shaped groove body of the floating threshold. As the door is closed and the floating threshold moves up, the sliding bar extends out of the limiting groove. When the door is closed, the sliding bar bends upward to form a baffle.

[0015] The bottom surface of the wedge-shaped body is provided with a supporting portion, and the side wall of the U-shaped groove is provided with a sealing strip that expands when exposed to heat.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The floating threshold floats up when the door is closed, forming an L-shaped overlap with the bottom of the door body to prevent radiation leakage. The floating threshold drops to the same level as the ground when the door is opened, and the floating threshold of the present application is in hard contact with the bottom groove of the threshold, which facilitates the smooth passage of vehicles and personnel in and out, and prevents the bed or wheelchair from tipping over due to the obstruction of the threshold when passing quickly in an emergency.

[0018] 2. By setting a baffle at the end of the floating threshold, when closing the door, the baffle can fit the fireproof and radiation-proof edge on the side of the door body to improve the sealing performance of the side of the fireproof and radiation-proof door.

[0019] 3. A lateral limiting device is provided at a position where the inclined surface height of the wedge-shaped body is less than or equal to the height of the U-shaped groove provided at the bottom of the door body, so as to prevent the door from being opened when the door switch control fails in the closed state of the door, resulting in ray leakage.

[0020] 4. The setting of the double-layer lead layer of the door body improves the radiation protection performance of the fire and radiation protection door. The symmetrically arranged lead plates can keep the center of gravity of the door body balanced and prevent the deformation of the door body caused by sagging.

[0021] 5. A pulley, a roller or a ball is provided at the end of the positioning rod to make the sliding of the floating threshold smoother and more labor-saving. By providing rollers at the bottom of the positioning rod, the horizontal movement of the floating threshold is more labor-saving.

[0022] 6. By providing a support portion on the bottom surface of the wedge-shaped body, the stability of the floating threshold is improved.

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Schematic diagram of the rising of the floating threshold of the present invention;

[0025] Figure 2 : Schematic diagram of the falling of the floating threshold of the present invention;

[0026] Figure 3 : Top view of the closed state of the present invention;

[0027] Figure 4 : Top view of the open state of the present invention;

[0028] Figure 5 : Detailed view of the lateral limiting mechanism of the present invention.

[0029] Reference numerals: U-shaped groove 1, positioning member 2, wedge-shaped block 3, groove body 4, installation groove 5, baffle 6, trigger head 7, connecting rod 8, spring 9, elastic clamping arm 10, groove 11, rotating shaft 12, push rod 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Combined with the above-mentioned attached Figures 1-4 , a fireproof and radiation-proof door provided with a floating threshold, comprising a door body and a floating threshold. A U-shaped groove 1 is provided at the bottom of the door body, and positioning members 2 that move horizontally as the door moves are arranged at intervals in the U-shaped groove. The floating threshold comprises a U-shaped groove body 4, and wedge-shaped blocks 3 corresponding to the positioning members 2 one by one are arranged in the U-shaped groove body. When the door body moves to the position of the floating threshold, the positioning members are located on one side of the inclined surface of the wedge-shaped blocks. The floating threshold is movably arranged in a threshold installation groove 5 on the ground. When the door body is closed, as the door body slides, the positioning members push the wedge-shaped blocks, causing the wedge-shaped blocks to drive the U-shaped groove body of the floating threshold to fit with the U-shaped groove at the bottom of the door body in a concave-convex manner to achieve sealing. When the door body is opened, as the door body slides, under the action of gravity, the wedge-shaped blocks of the floating threshold descend along the positioning members to the same horizontal plane as the ground. Through the floating threshold rising when the door is closed, an L-shaped lap joint is formed between it and the bottom of the door body, that is, a height difference is formed between the floating threshold plate and the ground, and the groove edge at the bottom of the door body shields the joint seam between the door body and the floating threshold. Therefore, it prevents rays from leaking from the bottom. Through the floating threshold descending to be flush with the ground when the door is opened, and the hard contact between the floating threshold of the present application and the threshold bottom groove facilitates the smooth passage of vehicles and personnel in and out. When passing quickly in an emergency, it prevents the hospital bed or wheelchair from tipping over due to the obstruction of the threshold.

[0032] Further, a floating threshold baffle 6 that bends upward is provided at the end of the top surface of the U-shaped groove body of the floating threshold. The baffle can fit with the side wall of the fireproof and radiation-proof door frame to improve the side sealing performance of the door.

[0033] Further, in order to prevent the floating threshold from suddenly failing after rising to a specified height, a lateral limiting device is provided at a position where the height of the inclined surface of the wedge-shaped body is less than or equal to the height of the U-shaped groove provided at the bottom of the door body. Refer to the attached Figure 5, to prevent the floating threshold from suddenly failing when it is in the floating state, causing the floating threshold to automatically fall, thereby weakening the fire and radiation protection performance of the bottom. Specifically, the lateral limit device is arranged in the groove 11 on one side of the inclined surface of the wedge block 3, and the lateral limit device includes a trigger head 7, a connecting rod 8, a spring 9, a rotating shaft 12, a push rod 13 and an elastic clamp arm 10. One end of the connecting rod 8 is connected to the trigger head 7, and the trigger head 7 extends out of the groove 11. The other end of the connecting rod 8 is against the side wall of the groove of the wedge block and is fixedly connected to one end of the push rod 13. The middle part of the connecting rod 8 is rotatably connected through the rotating shaft 12, and the other end of the push rod 13 is fixedly connected to the elastic clamp arm 10. The spring 7 is arranged at the corresponding position of the groove side wall and the trigger head, and the spring pulls the groove wall and the connecting rod 8 together. When the floating threshold rises to the position where it is pressed against the groove at the bottom of the door panel, the side of the positioning piece touches the trigger head, which drives the spring to compress and the connecting rod to rotate. The end of the connecting rod that fits the inner wall of the groove drives the push rod to push the elastic clamp arm outward, and the elastic clamp arm opens and tightens the rod body of the positioning rod, thereby achieving the height limit of the floating threshold.

[0034] Furthermore, the U-shaped groove body and the threshold body of the floating threshold are made of a composite of stainless steel, lead plate and fireproof material, which is consistent with the material of the door body, ensuring the sealing performance of the bottom while improving the fireproof and radiationproof performance of the bottom.

[0035] Furthermore, limiting grooves are provided at both ends of the U-shaped groove at the bottom of the door body, and sliding bars extending out of the limiting grooves are provided at both ends of the end surface of the U-shaped groove body of the floating threshold, and the sliding bars are connected to the U-shaped groove body axis. In order to improve the matching of the door body and the threshold, when the door is opened, the sliding bar slides out of the limiting groove, and the floating threshold drops at the same time. As the door is closed, as the floating threshold moves upward, the sliding bar extends out of the limiting groove. When the door is closed, the sliding bar bends upward to form a baffle. The floating threshold baffle can also be formed by bending the top surface of the U-shaped groove body of the floating threshold upward.

[0036] Furthermore, in order to improve the smoothness of the cooperation between the floating threshold and the door body, the positioning member is selected as a positioning rod, the end of which is provided with a pulley, a roller or a ball, and the bottom of the positioning rod is provided with a roller. The sliding setting at the end can improve the smoothness of the movement of the inclined surface of the wedge block along the end of the positioning rod, and the roller at the bottom increases the smoothness of the horizontal movement of the positioning rod along the bottom groove of the threshold.

[0037] In the specific implementation, the U-shaped groove is provided with positioning members 2 which move horizontally with the movement of the door at intervals. Connecting arms fixedly connected to the positioning members are arranged at intervals on the side walls of the U-shaped groove. The movement of the door body drives the connecting arms to move horizontally. The connecting arms pull the positioning members to move horizontally along the bottom groove of the door sill installation. The horizontal movement of the positioning members drives the inclined surface of the wedge block to move up and down, thereby realizing the height adjustment of the door sill.

[0038] In specific implementation, in order to improve the fire and radiation protection performance of the door body, the door body structure can be selected as a double-lead plate fire and radiation protection door body with steel plates on both sides clamping a lead plate, a keel arranged in the middle and filled with fireproof materials.

[0039] In specific implementation, in order to improve the stability of the floating threshold after the door is opened, a support part is arranged on the bottom surface of the wedge-shaped body so that it contacts the bottom surface of the threshold installation groove to form a hard support, thereby improving the stability of the floating threshold. In order to further improve the sealing performance of the bottom of the door body, a heat-expandable sealing strip is arranged on the side wall of the U-shaped groove.

[0040] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fire and radiation protection door provided with a floating threshold, characterized in that: It includes a door body and a floating threshold. A U-shaped groove is provided at the bottom of the door body, and positioning members that move translationally as the door moves are arranged at intervals in the U-shaped groove. The floating threshold includes a U-shaped groove body, and wedge-shaped blocks corresponding to the positioning members one by one are arranged in the U-shaped groove body. When the door body moves to the position of the floating threshold, the positioning members are located on one side of the inclined surface of the wedge-shaped blocks. The floating threshold is movably arranged in the threshold installation groove on the ground. When the door body is closed, as the door body slides, the positioning members push the wedge-shaped blocks, causing the wedge-shaped blocks to drive the U-shaped groove body of the floating threshold to fit with the U-shaped groove at the bottom of the door body in a concave-convex manner to achieve sealing. When the door body is opened, as the door body slides, under the action of gravity, the wedge-shaped blocks of the floating threshold descend along the positioning members to the same horizontal plane as the ground.

2. The fire and radiation protection door provided with a floating threshold according to claim 1, characterized in that: An upwardly bent floating threshold baffle is provided at the end of the top surface of the U-shaped groove body of the floating threshold.

3. The fire and radiation protection door provided with a floating threshold according to claim 2, characterized in that: A lateral limiting device is provided at a position where the height of the inclined surface of the wedge-shaped body is less than or equal to the height of the U-shaped groove provided at the bottom of the door body.

4. The fire and radiation protection door with a floating threshold according to claim 3, characterized in that: The lateral limiting device is arranged in the groove on one side of the inclined surface of the wedge-shaped block. The lateral limiting device includes a trigger head, a connecting rod, a spring, a rotating shaft, a push rod, and a clamping arm. One end of the connecting rod is connected to the trigger head, and the trigger head extends out of the groove. The other end of the connecting rod abuts against the side wall of the groove of the wedge-shaped block and is fixedly connected to one end of the push rod. The middle of the connecting rod is rotatably connected through a rotating shaft. The other end of the push rod is fixedly connected with an elastic clamping arm. A spring is provided at a position corresponding to the trigger head on the side wall of the groove. The spring pulls the groove wall and the connecting rod. When the floating threshold rises to the position where it is tightly pressed against the bottom groove of the door panel, the side of the positioning member touches the trigger head, driving the spring to compress and the connecting rod to rotate. The end of the connecting rod that fits with the inner wall of the groove drives the push rod to push the elastic clamping arm outwards, and the elastic clamping arm opens to clamp the rod body of the positioning rod.

5. The fire and radiation protection door provided with a floating threshold according to any one of claims 1-4, characterized in that: The U-shaped groove body of the floating threshold and the threshold body are made of a composite of stainless steel, lead plate, and fireproof material.

6. The fire and radiation protection door provided with a floating threshold according to claim 1, characterized in that: Connecting arms fixedly connected to the positioning members are arranged at intervals on the side wall of the U-shaped groove.

7. The fire and radiation protection door provided with a floating threshold according to any one of claims 1-4, characterized in that: The positioning member is a positioning rod, and a pulley, a roller, or a ball is provided at its end. A roller is provided at the bottom of the positioning rod.

8. The fire and radiation protection door provided with a floating threshold according to claim 2, characterized in that: The floating threshold baffle is integrally formed by bending upwards from the top surface of the U-shaped groove body of the floating threshold.

9. The fire and radiation protection door with a floating threshold according to any one of claims 1-4, characterized in that: Limit grooves are provided at both ends of the U-shaped groove at the bottom of the door body. Sliding strips extending out of the limit grooves are provided at both ends of the end surface of the U-shaped groove body of the floating threshold. As the door closes and the floating threshold moves upwards, the sliding strips extend out of the limit grooves. When the door is closed tightly, the sliding strips are bent upwards to form a baffle.

10. The fire and radiation protection door provided with a floating threshold according to any one of claims 1-4, characterized in that: A support portion is provided on the bottom surface of the wedge-shaped body, and a heat-expandable sealing strip is provided on the side wall of the U-shaped groove.

Images