Radiation-proof vertical hinged door system

Abstract

The anti-radiation vertical hinged door system comprises a door leaf, a door frame and a ray protection part, a groove is formed in the bottom of the door leaf in the width direction of the door leaf and located between ray protection layers on the inner side and the outer side of the door leaf, the top face of the groove inclines upwards in the opening direction of the door leaf, and a driving part is arranged on the top face of the groove; a cavity is formed in the plane position of the door frame on the ground, and the ray protection piece is arranged in the cavity; the ray protection part comprises a rotating shaft, a rotating part, a counterweight part and a protection plate; the groove is formed in the ground, the ray protection part is arranged in the groove, when the door body is closed, the ray protection part is lifted, a lap joint protection layer is formed in a gap formed between the door body and the ground to prevent rays from leaking, when the door body is opened, the ray protection part automatically descends into the groove, and the ground does not have protrusions in the plane of the door frame. And passing of patients, medical staff and medical equipment is facilitated.

Description

Technical Field

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

[0002] In scenarios such as medical radiotherapy rooms, nuclear medicine laboratories, and industrial radiation protection, radiation protection doors, as key equipment for shielding ionizing radiation, their sealing performance directly affects the radiation protection effect. Traditional radiation protection doors mostly use lead plates or composite heavy metal layers as the shielding main body. However, due to the need to ensure smooth opening and closing, a bottom gap of 5-8 mm is usually left in the area where the door body contacts the ground, and this gap becomes the main path for radiation leakage.

[0003] In the prior art, to solve the problem of door gap sealing, mainly two solutions are adopted: One is to set a radiation protection structure at the bottom ground position of the door frame. For example, a protection baffle is set at the ground door frame position to form a protection overlapping surface with the door leaf, so as to prevent radiation from leaking at the door gap. However, during the long-term opening and closing use of the door body, the door leaf and the protection baffle have hard collisions, and there is a risk of structural damage. For this reason, CN215292240U replaces the protection baffle with a gentle slope structure, which can avoid the hard contact between the door leaf and the protection structure, and at the same time meet the requirement of preventing radiation from leaking at the door gap to a certain extent. However, the fit between the radiation protection structure and the door body is not high, and the effectiveness of the radiation protection surface overlap is poor, and there is a greater risk of leaking radiation. In addition, it is worth noting that application scenarios such as medical institutions have strict requirements for barrier-free passage on the ground. When the radiation protection door is in the open state, in the above-mentioned scheme of setting a fixed protection structure on the ground, the sealing structure often protrudes 3-8 cm from the ground, forming a passage obstacle, which not only affects the smooth passage of equipment such as medical trolleys and wheelchairs, but may also cause personnel tripping accidents.

[0004] The second is to adopt a mechanically linked lifting protection baffle. For example, CN216588362U discloses a highly secure radiation protection door with a function of shielding the lower door gap. This scheme uses a gear mechanical transmission to enable the protection door to control the lifting of the protection baffle simultaneously during the opening and closing process, achieving the dual purposes of protection and passage. However, such mechanical structures have problems such as fast component wear and high maintenance frequency, and the operation of mechanical components is easily affected by assembly accuracy and ground flatness, and may experience jamming after long-term use, especially in emergency scenarios, it may be difficult to open and close, seriously affecting the use safety of the protection door.

[0005] Third, the door body will generate a large impact force on the door frame during the closing process. The prior art generally uses a rigid limiter to constrain the door body travel. However, the radiation-proof door has the characteristics of heavy weight. The impact force generated by the door body on the door frame and hinge when it is closed can be as high as 400-600N. Long-term use under such a load is likely to cause structural deformation, seriously affecting the durability and safety of the protective door. In order to resist the impact force generated by the closing of the door body, the prior art generally uses elastic parts to achieve buffering. For example, CN222436218U, an impact-resistant protective closed door, realizes the change of force direction through gear rack meshing transmission, and sets elastic parts to achieve the purpose of buffering. However, elastic parts (such as rubber, polymer, spring steel) will age (such as rubber hardening, cracking) or creep (material slowly deforms under continuous stress) in long-term use or high temperature environment, resulting in a gradual decrease in buffering performance, which may cause impact force rebound or door body not closed tightly. Summary of the invention

[0006] In response to the above technical bottlenecks, it is urgent to develop a swing door system with adaptive sealing, barrier-free passage, good buffering performance and radiation protection performance, so as to improve equipment reliability and environmental friendliness while ensuring radiation shielding effectiveness.

[0007] A radiation-proof swing door system comprises a door leaf, a door frame, and a radiation protection member. A groove is arranged at the bottom of the door leaf along the width direction of the door leaf, the groove is located between the radiation protection layers on the inner and outer sides of the door leaf, the top surface of the groove is inclined upward along the opening direction of the door leaf, and a driving member is arranged on the top surface of the groove; a cavity is arranged on the ground at a plane position of the door frame, and the radiation protection member is arranged in the cavity; the radiation protection member comprises a rotating shaft, a rotating member, a counterweight member and a protective plate; both ends of the rotating shaft are fixedly connected to both sides of the door frame and offset along the closing direction of the door leaf; the rotating member is sleeved on the rotating shaft and is in a horizontal state after the rotating member is separated from the driving member; the rotating member is hinged with a counterweight member on one side of the rotating member in the offset direction of the rotating shaft, and the other side of the rotating member is attracted to the driving member; the upper end of the protective plate is parallel to the rotating shaft and is hinged to one end of the rotating member away from the counterweight member, and the lower end of the protective plate is movably arranged in the cavity.

[0008] Furthermore, the weight and position of the rotating parts, counterweights and protective plates of the radiation proof swing door system satisfy the following formula: (M1+Mf)x1=(M2+Mp)x2, where M1 and M2 are respectively the weight from the axis of the rotating part to one end of the protective plate, and the weight from the axis of the rotating part to one end of the counterweight; Mf and Mp are respectively the weight of the protective plate and the counterweight; x1 and x2 are respectively the distance between the axis of the rotating shaft and the hinge point of the protective plate, and the distance between the axis of the rotating shaft and the hinge point of the counterweight.

[0009] Furthermore, the radiation-proof swing door system also includes a sliding groove provided on the rotating member, and the rotating shaft is arranged in the sliding groove so that the rotating member can move in a direction close to or away from the driving member.

[0010] Further, the rotating member of the radiation-proof swing door system is a cuboid structure with closed surroundings and top surface, and the counterweight member and the protective plate are respectively arranged on both end faces of the cuboid through pin shafts.

[0011] Further, the pin shafts by which the counterweight member, the protective plate and the rotating member of the radiation-proof swing door system are hinged are damping limit pin shafts.

[0012] Further, the top surface of the groove of the radiation-proof swing door system forms an angle of 30° - 45° with the ground.

[0013] Further, a fireproof shock-absorbing rubber strip is arranged on the surface of the driving member of the radiation-proof swing door system, and fireproof shock-absorbing rubber pads are arranged at both vertical ends of the sliding groove.

[0014] Further, the driving member of the radiation-proof swing door system is a composite member of permanent magnet and electromagnetic enhancement.

[0015] Further, an electromagnetic control valve is arranged on the door leaf of the radiation-proof swing door system, and the electromagnetic control valve adjusts the magnetic force gradient of the driving member.

[0016] Further, both the ray protection layer and the protective plate of the radiation-proof swing door system are lead plates.

[0017] The present invention has the following advantages and beneficial effects compared with the prior art:

[0018] 1. The present invention sets a groove on the ground and arranges the ray protection member in the groove. When the door body is closed, the ray protection member is lifted to form an overlapping protection layer at the gap formed between the door body and the ground to prevent ray leakage. When the door body is opened, the ray protection member automatically descends into the groove, making the ground have no protrusion within the plane of the door frame, which is convenient for the passage of patients, medical staff and medical equipment.

[0019] 2. The present invention adopts the cooperation of a composite member of permanent magnet and electromagnetic enhancement and an electromagnetic control valve. By adjusting the magnetic force, the magnetic force increases when the door body is closed and decreases when the door body is opened, thus ensuring the lifting and lowering of the ray protection member, ensuring the sealing of the door gap and the easy opening of the door body. At the same time, it can ensure that in the case of a failure or power outage of the electromagnetic control valve, the weak magnetic attraction of the permanent magnet can also meet the basic needs of the ray protection member to be lifted, preventing ray leakage and the accident that the door body cannot be opened. This magnetic attraction driving scheme has a simple structure, does not require the cooperation of complex mechanical components, the installation accuracy and the ground flatness have little influence on the operation of the device, and after long-term use of the door body, there will be no large mechanical wear, so as to maintain the opening and closing lasting smoothly and meet the strength and function requirements of different scenarios.

[0020] 3. In the present invention, the joint surface between the magnetic driving member and the radiation protection member is an inclined surface. By setting the inclined surface, it is possible to prevent the door leaf from continuing to move along the closing direction when closing the door. At the same time, this inclined surface can ensure that the door leaf will not be hindered in the opening direction when opening the door. In other words, setting the inclined joint surface can both limit the door leaf when closing, reducing the impact and collision on each component when the door body closes, and ensure that the door body can be easily opened in case of an emergency.

[0021] 4. The solenoid valve involved in the present invention automatically opens when closing the door, and the magnetic force of the magnetic member increases flexibly to drive the radiation protection member to lift. The flexibly increasing magnetic suction force and the inclined joint surface work together to effectively buffer the impact force generated when the door leaf with a large self-weight closes, preventing the structure from being deformed and damaged due to excessive load. The realization of the buffering function does not require the use of traditional elastic elements, avoiding the decline in performance after long-term use.

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. 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, without creative efforts, other related drawings can also be obtained based on these drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a radiation-proof flat door;

[0024] Figure 2 is a top view of the ground cavity of the radiation-proof flat door;

[0025] Figure 3 is a sectional view of the radiation-proof flat door taken along line A-A;

[0026] Figure 4 is a diagram of the closed state of the door leaf of the radiation-proof flat door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0028] Such as Figures 1-4As shown in the figure, the radiation-proof flat door system includes a door leaf 1, a door frame 2, and a radiation protection member 3. A groove 6 is provided at the bottom of the door leaf 1 along the width direction of the door leaf 1. The groove 6 is located between the radiation protection layers on the inner and outer sides of the door leaf 1. The top surface of the groove 6 slopes upward along the opening direction of the door leaf 1, and a driving member 4 is provided on the top surface of the groove 6; a cavity 5 is provided on the ground at the position of the plane of the door frame 2, and the radiation protection member 3 is arranged in the cavity 5; the radiation protection member 3 includes a rotating shaft 31, a rotating member 32, a counterweight member 33, and a protection plate 34; both ends of the rotating shaft 31 are fixedly connected to both sides of the door frame 2 and are offset along the closing direction of the door leaf 1; the rotating member 32 is sleeved on the rotating shaft 31 and is in a horizontal state after being separated from the driving member 4; a counterweight member 33 is hinged to one side of the rotating member 32 in the offset direction of the rotating shaft 31, and the other side of the rotating member 32 is attracted to the driving member 4; the upper end of the protection plate 34 is parallel to the rotating shaft 31 and is hinged to the end of the rotating member 32 away from the counterweight member 33, and the lower end of the protection plate 34 is movably arranged in the cavity 5. Since the top surface of the groove 6 slopes upward along the opening direction of the door leaf 1, when the door is closed, the rotating member 32 rotates under the action of the driving member 4, so that the protection plate 34 rises to block the door gap. The protection plate 34 forms an overlap with the radiation protection layer provided on the door leaf 1 to prevent radiation from leaking at the door gap position. In addition, the inclined setting method also restricts the further movement of the door leaf 1 along the closing direction, playing a limiting role. When the door is opened, the door leaf 1 can be opened along the inclined direction without causing an obstacle to opening the door. After the door leaf 1 is opened, the rotating member 32 rotates reversely under the action of gravity and descends into the cavity 5, so that the ground returns to a smooth state for the passage of personnel and equipment.

[0029] In some solutions, the counterweight member 33 can be set to have a repulsive effect on the driving member 4 so that the rotating member 32 can better generate a rotational movement under the action of the driving member 4.

[0030] In some solutions, the weights and positions of the rotating member 32, the counterweight member 33, and the protection plate 34 of the radiation-proof flat door system satisfy the following formula: (M1 + Mf)x1 = (M2 + Mp)x2, where M1 and M2 are the weights from the axis of the rotating shaft 31 of the rotating member 32 to one end of the protection plate 34 and from the axis of the rotating shaft 31 of the rotating member 32 to one end of the counterweight member 33 respectively; Mf and Mp are the weights of the protection plate 34 and the counterweight member 33 respectively; x1 and x2 are the distances between the axis of the rotating shaft 31 and the hinge point of the protection plate 34 and the distances between the axis of the rotating shaft 31 and the hinge point of the counterweight member 33 respectively. By calculating the weights and distances of the components of the radiation protection member 3 through the above formula, it is ensured that the radiation protection member 3 maintains a horizontal state after being separated from the driving member 4, achieving a flat ground for convenient passage.

[0031] In some solutions, the radiation-proof swing door system further includes a sliding groove 35 provided on the rotating member 32, and the rotating shaft 31 is arranged in the sliding groove 35 so that the rotating member 32 can move closer to or away from the driving member 4. The provision of the sliding groove 35 enables the rotating member 32 to move towards the driving member 4 while rotating when closing the door, making the two fit together, achieving the purpose of fully lifting the shielding plate 34 to block the door gap. On the other hand, after opening the door, the rotating member 32 descends along the sliding groove 35 into the cavity 5 to ensure the flatness of the ground.

[0032] In some solutions, the rotating member 32 of the radiation-proof swing door system is a cuboid structure with its four sides and top surface closed, and the counterweight member 33 and the shielding plate 34 are respectively arranged on both end faces of the cuboid through pin shafts.

[0033] In some solutions, the pin shafts by which the counterweight member 33, the shielding plate 34 and the rotating member 32 of the radiation-proof swing door system are hinged are damping limit pin shafts. The damping limit pin shafts can control the rotation speed and amplitude of the radiation protection components during rotation, preventing collisions and interferences between structures.

[0034] In some solutions, the top surface of the groove 6 of the radiation-proof swing door system forms an acute angle of 30° - 45° with the ground.

[0035] In some solutions, a fireproof damping rubber strip is provided on the surface of the driving member 4 of the radiation-proof swing door system, and fireproof damping rubber pads are provided at both vertical ends of the sliding groove 35. The provision of the fireproof damping rubber strip and rubber pads can prevent excessive friction and vibration caused by the contact between components.

[0036] In some solutions, the driving member 4 of the radiation-proof swing door system is a permanent magnet and electromagnetic enhancement composite member. The permanent magnet ensures that the radiation protection component can still ensure the realization of the basic functions of the door body in the case of power failure.

[0037] In some solutions, an electromagnetic control valve is provided on the door leaf 1 of the radiation-proof swing door system, and the electromagnetic control valve adjusts the magnetic force gradient of the driving member 4. The electromagnetic control valve can adjust the magnetic strength of the permanent magnet and electromagnetic enhancement composite member, and the gradual adjustment of the magnetic force gradient in coordination with the design of the inclined plane enables the door leaf 1 to be effectively buffered when closing, preventing deformation and damage of the structure caused by long-term excessive impact force. In addition, the electromagnetic control valve can be closed when there is no radiation source in the room, and only the permanent magnetism in the permanent magnet and electromagnetic enhancement composite member is used to maintain the sealing of the door gap.

[0038] In some solutions, both the radiation protection layer and the shielding plate 34 of the radiation-proof swing door system are lead plates.

[0039] The operating principle of the radiation-proof flat door system is as follows: when the door needs to be closed, the door leaf 1 moves in the closing direction. When the door leaf 1 approaches the door frame 2, the electromagnetic control valve works to control the increase of the magnetic gradient of the driving part 32. The rotating part 32 rotates under the action of the magnetism of the driving part 4, and when the door leaf 1 presses against the door frame 2, the rotating part 32 rotates and rises to fit with the driving part 4. At the same time, the protective plate 34 is lifted to block the door gap. When opening the door, the electromagnetic control valve closes, the magnetism of the driving part 32 weakens, the door leaf 1 opens along the inclined plane, and the radiation protection part 3 rotates and descends into the cavity 5, and returns to the state flush with the ground under the action of the gravity of the counterweight 33 and the protective plate 34.

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

Claims

1. A radiation-proof swing door system, characterized in that: It includes a door leaf, a door frame, and a radiation protection member. A groove is arranged at the bottom of the door leaf along the width direction of the door leaf, the groove is located between the radiation protection layers on the inner and outer sides of the door leaf, the top surface of the groove is inclined upward along the opening direction of the door leaf, and a driving member is arranged on the top surface of the groove; a cavity is arranged on the ground at the plane position of the door frame, and the radiation protection member is arranged in the cavity; the radiation protection member includes a rotating shaft, a rotating member, a counterweight member and a protective plate; the two ends of the rotating shaft are fixedly connected to the two sides of the door frame and offset along the closing direction of the door leaf; the rotating member is sleeved on the rotating shaft and is in a horizontal state after the rotating member is separated from the driving member; the rotating member is hinged with a counterweight member on one side of the offset direction of the rotating shaft, and the other side of the rotating member is attracted to the driving member; the upper end of the protective plate is parallel to the rotating shaft and is hinged to the end of the rotating member away from the counterweight member, and the lower end of the protective plate is movably arranged in the cavity.

2. The radiation-proof swing door system according to claim 1, characterized in that: The weight and position of the rotating parts, counterweights and protective plates of the radiation proof swing door system satisfy the following formula: (M1+Mf)x1=(M2+Mp)x2, where M1 and M2 are respectively the weight from the axis of the rotating part to one end of the protective plate, and the weight from the axis of the rotating part to one end of the counterweight; Mf and Mp are respectively the weight of the protective plate and the counterweight; x1 and x2 are respectively the distance between the axis of the rotating shaft and the hinge point of the protective plate, and the distance between the axis of the rotating shaft and the hinge point of the counterweight.

3. The radiation-proof swing door system according to claim 1, characterized in that: The radiation-proof swing door system also includes a sliding groove arranged on the rotating member, and a rotating shaft is arranged in the sliding groove so that the rotating member can move in a direction close to or away from the driving member.

4. The radiation-proof swing door system according to any one of claims 1 or 3, characterized in that: The rotating part of the radiation-proof swing door system is a rectangular parallelepiped structure with closed sides and top surface, and the counterweight and the protective plate are respectively arranged on the end surfaces of both sides of the rectangular parallelepiped through pins.

5. The radiation-proof swing door system according to any one of claims 1 to 3, characterized in that: The pin shaft for articulating the counterweight, the protective plate and the rotating part of the radiation-proof swing door system is a damping limit pin shaft.

6. The radiation-proof swing door system according to claim 1, characterized in that: The top surface of the groove of the radiation-proof swing door system is 30°-45° to the ground.

7. The radiation-proof swing door system according to claim 1, characterized in that: The surface of the driving part of the radiation-proof swing door system is provided with fire-proof and shock-absorbing rubber strips, and the sliding groove is provided with fire-proof and shock-absorbing rubber pads at both vertical ends.

8. The radiation-proof swing door system according to any one of claims 1 or 7, characterized in that: The driving components of the radiation-proof swing door system are permanent magnet and electromagnetic reinforcement composite components.

9. The radiation-proof swing door system according to claim 1, characterized in that: The door leaf of the radiation-proof swing door system is provided with an electromagnetic control valve, which adjusts the magnetic gradient of the driving part.

10. The radiation-proof swing door system according to claim 1, characterized in that: The radiation protection layer and protection plate of the radiation proof swing door system are both lead plates.

Images