Pressure relief opening capable of preventing radiation leakage
By designing a pressure relief port structure including concrete baffle and lead protective layer, combined with a mechanical pressure relief device and pressure relief hole, the problem of insufficient flexibility in the design of radiation relief ports in the prior art, affecting pressure relief risks, radiation relief risks and high additional investment, achieving effective radiation protection and safe pressure relief effects.
Patent Information
- Application Number
- CN202420604592.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In the prior art, the design of the pressure relief port for radiation leakage is insufficient flexibility, affecting the pressure relief risks, radiation leakage risks and high additional investment.
A pressure relief port structure including a radiation source, a concrete baffle, a mechanical pressure relief device and a pressure relief hole is designed. The combination of the concrete baffle and a lead protective layer is used to form a radiation barrier, and safe pressure relief is achieved through the cooperation of the mechanical pressure relief device and the pressure relief hole.
This design solves the problem of pressure relief port design, is flexible enough to avoid hidden dangers that affect pressure relief, ensures radiation protection, reduces additional investment, and simplifies the design and radiation safety evaluation process.
Smart Images
Figure CN222595929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical protection, in particular to a pressure relief port for preventing radiation leakage. Background Art
[0002] In the division of medical functional units in modern medical buildings, medical technology departments are extremely important components. Their diagnostic and treatment equipment, such as CT, DR, and linear accelerators, will become strong radiation sources when in operation. If they are not properly protected, radiation leakage will cause great personal and environmental damage. Due to the preciousness of such equipment, gas fire extinguishing systems are often used in the room for fire protection; however, in the gas fire extinguishing system that protects such rooms, the standardized design of small pressure relief ports has become a major difficulty, because it must not only meet the requirements of fire protection, but also the requirements of radiation protection. At present, there is basically no pressure relief port for the gas fire extinguishing system dedicated to the room with strong radiation source equipment to prevent radiation leakage. It is more common to use a specially customized lead louvered pressure relief panel on the inside of the machine room with a reserved civil engineering pressure relief hole (hereinafter referred to as "pressure relief hole"), which is used as a barrier panel that can prevent radiation leakage and a pressure relief device; an ordinary mechanical automatic pressure relief device is installed on the outside. This combined pressure relief port can only barely replace it, and has the following shortcomings:
[0003] 1. Lack of flexibility. Lead louver pressure relief panels need to be customized one-to-one. Because the conditions of each protection area of each project are not completely consistent, the required panel size thickness, lead louver size specifications, louver spacing, etc. are not the same. Each one needs to be precisely customized, which is time-consuming and laborious. Whether the customized finished product meets the requirements must also undergo radiation safety evaluation.
[0004] 2. There are hidden dangers that affect pressure relief. The area of the pressure relief port needs to be accurately calculated according to the formula specified in the corresponding specifications and standards. If it is too small, the pressure in the protection zone will increase rapidly after the fire extinguishing system is activated, and there is a hidden danger that the structure of the protection zone will exceed the pressure limit and be damaged, resulting in fire extinguishing failure. If it is too large, the gas fire extinguishing agent will be lost excessively, thus affecting the fire extinguishing effect. The size conditions of the pressure relief hole reserved in the design stage cannot take into account in advance the specific net pressure relief area of the louvered pressure relief panel customized later; the opening angle of the louver is difficult to determine, and even if it is determined, it is difficult to calculate its net flow area; in addition, there are resistance factors to the airflow of various parts of the panel. The best way is to conduct physical tests after customization, but both the test conditions and economic investment are extremely difficult to achieve.
[0005] 3. There is a risk of radiation leakage. When installing the louvered pressure relief panel, special attention should be paid to the location of the radiation source and the opening angle of the louver. If the flow gap of the louver is in a straight line with the radiation, radiation leakage will occur and the panel will lose its radiation protection function. This probability is very small, but it cannot be ruled out.
[0006] 4. The additional investment is relatively high. Taking a single 500mm×500mm pressure relief port as a reference, the cost of the lead louvered pressure relief panel accounts for about 40% to 50% of the entire set of combined pressure relief ports. Each project has more than one protection area, or even more than a dozen. The additional investment in the lead louvered pressure relief panel is still considerable. If a comprehensive and effective new type of pressure relief port can be developed based on the existing common pressure relief ports (including pressure relief holes and mechanical automatic pressure relief devices), the problem will be changed from difficult to easy and from complex to simple.
[0007] Therefore, a pressure relief vent for preventing radiation leakage is proposed to solve the current shortcomings. Utility Model Content
[0008] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a pressure relief port for preventing radiation leakage.
[0009] In order to solve the above technical problems, the technical solution provided by the utility model is a pressure relief port for preventing radiation leakage: comprising a radiation source, a concrete baffle, a mechanical pressure relief device and a pressure relief hole;
[0010] The radiation source is arranged on the floor of the room, a pressure relief hole is arranged on the wall of the room, a concrete baffle is arranged on the wall at the pressure relief hole to form an air passage, the radiation source is connected to the air passage, the cross section of the concrete baffle is L-shaped, the concrete baffle is covered with a lead sheet protective layer and its opening direction faces upward;
[0011] A mechanical pressure relief device is provided on one side of the pressure relief hole away from the concrete baffle.
[0012] As an improvement, the central axis of the radiation source is consistent with the central axis of the concrete baffle and the pressure relief hole.
[0013] As an improvement, the pressure relief hole is located above 2 / 3 of the net height of the room wall.
[0014] As an improvement, the pressure relief hole is a rectangular structure, and the concrete baffle is adapted to the pressure relief hole.
[0015] As an improvement, the concrete baffle is a structure with openings on three sides, the length of the concrete baffle is greater than the length of the pressure relief hole, and the height of the concrete baffle is greater than the height of the pressure relief hole.
[0016] The advantages of the utility model compared with the prior art are:
[0017] 1. The setting of the pressure relief hole effectively solves the design problem of the pressure relief hole when the room with strong radiation source is protected by the gas fire extinguishing system. In addition to being suitable for large medical equipment rooms with strong radiation sources in medical and technical departments of medical buildings, it is also suitable for industrial and mining enterprises, laboratories, scientific research buildings and other similar function rooms. It can meet the special fire protection requirements of such buildings and their radiation safety protection requirements;
[0018] 2. Sufficient flexibility. There is no need for complex customization of various sizes and shapes. You only need to determine the thickness of the lead sheet according to the radiation safety assessment report of the project to form a sufficient safety protection barrier. At the same time, through the coordinated setting of the concrete baffle, its radiation protection shielding effect can be further enhanced, and the thickness of the concrete baffle is flexible and controllable;
[0019] 3. The preparation and installation of the lead protective layer are convenient. It can be directly laid on the side of the concrete baffle facing the radiation source, and the construction and maintenance are easy.
[0020] 4. There are no hidden dangers that affect pressure relief through the implementation of the pressure relief hole. The net area of the pressure relief hole is the actual calculated value in the design stage, and there are no other unforeseen factors that hinder or lose pressure relief, and the pressure relief is smooth;
[0021] 5. The concrete baffle is durable and low-cost, and it also has a certain radiation protection shielding effect;
[0022] 6. No extra time investment is required, which greatly simplifies the work content between design and project radiation safety assessment. The radiation safety assessment unit only needs to propose the thickness of the lead protective layer. There is no uncertain work content such as repeated funding, evaluation, adjustment, and customization.
[0023] 7. The pressure relief vent has a simple structure and is easy to implement. It can effectively meet the requirements for preventing radiation leakage in rooms with radiation sources, and has strong practicality and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the structure of a pressure relief port for preventing radiation leakage in the utility model. Figure 1 .
[0025] Figure 2 This is a schematic diagram of the structure of a pressure relief port for preventing radiation leakage in the utility model. Figure 2 .
[0026] Figure 3 The utility model is a top view of a pressure relief port for preventing radiation leakage.
[0027] Figure 4 The utility model is a side view of a pressure relief port for preventing radiation leakage.
[0028] Figure 5 yes Figure 3 Cross-sectional view at AA in the middle.
[0029] Figure 6 It is a verification plan view of a radiation-proof external pressure relief port of the utility model.
[0030] As shown in the figure: 1. Radiation source, 2. Concrete baffle, 3. Mechanical pressure relief device, 4. Pressure relief hole, 5. Lead protective layer, 6. Wall, 7. Shadow area. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the utility model embodiments clearer, the technical solution in the utility model embodiments will be clearly and completely described below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the utility model embodiments, not all of the embodiments. Generally, the components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.
[0032] In the description of the utility model embodiments, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of the embodiments of the utility model, "plurality" means at least 2.
[0035] In the description of the utility model embodiments, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.
[0036] Combined with Figure 1-6 As shown, a pressure relief vent for preventing radiation leakage includes a radiation source 1, a concrete baffle 2, a mechanical pressure relief device 3 and a pressure relief hole 4; during implementation, the mechanical pressure relief device 3 is a direct use of the existing technology.
[0037] The radiation source 1 is arranged on the floor of the room, and a pressure relief hole 4 is arranged on the wall 6 of the room. Specifically, the structure of the pressure relief hole 4 can be arranged according to actual conditions. In the present embodiment, the pressure relief hole 4 is a rectangular structure. The implementation of the rectangular pressure relief hole 4 is convenient for implementation in civil engineering.
[0038] The wall 6 is provided with a concrete baffle 2 at the pressure relief hole 4 to form an air flow maze, the radiation source 1 is connected to the air flow maze, and the opening direction of the concrete baffle 2 faces upward;
[0039] During implementation, the concrete baffle 2 and the wall 6 are both reinforced concrete structures, and the concrete baffle 2 and the wall 6 are cast as one piece. Through the setting of the concrete baffle 2, the indoor overpressure air where the radiation source 1 is set during fire fighting is organized to pass through the diversion effect of the concrete baffle 2 and then safely discharged through the pressure relief hole 4 and the mechanical pressure relief device 3, meeting the fire fighting requirements and having an effective blocking and shielding effect to prevent radiation leakage.
[0040] Specifically, the concrete baffle 2 is adapted to the pressure relief hole 4. During implementation, the concrete baffle 2 is a structure with three side openings. At the same time, the cross-section of the concrete baffle 2 is L-shaped. A certain distance is provided between the open side of the concrete baffle 2 and the pressure relief hole 4. In the present embodiment, the distance between the open side of the concrete baffle 2 and the pressure relief hole 4 is 120 mm.
[0041] Specifically, the central axis of the radiation source 1 is consistent with the central axis of the concrete baffle 2 and the pressure relief hole 4. At the same time, the length of the concrete baffle 2 is greater than the length of the pressure relief hole 4, and the height of the concrete baffle 2 is greater than the height of the pressure relief hole 4, that is, the area of the opening side of the concrete baffle 2 is greater than the opening area of the pressure relief hole 4. At this time, the line connecting the two ends of the pressure relief hole 4 and the two ends of the concrete baffle 2 can form a shadow area 7 on the rear side of the concrete baffle 2, and when implemented, the radiation source 1 is located in the shadow area, and the radiation protection requirements for the radiation source 1 can be achieved.
[0042] Furthermore, the pressure relief hole 4 is located above 2 / 3 of the net height of the room wall 6, which can ensure the use of the interior space of the room.
[0043] A mechanical pressure relief device 3 is provided on one side of the pressure relief hole 4 away from the concrete baffle 2 . When implemented, the indoor pressure can be effectively and safely released to the outdoors through the mechanical pressure relief device 3 .
[0044] The concrete baffle 2 is covered with a lead protective layer 5. Specifically, the lead protective layer 5 is determined based on a radiation safety assessment. In the present embodiment, the thickness of the lead protective layer 5 is 5-10 mm, while reducing the impact on the thickness of the concrete baffle 2. At the same time, through the setting of the concrete baffle 2 and the lead protective layer 5, a radiation protection barrier is formed together, which can safely and effectively block radiation and prevent radiation leakage.
[0045] During the specific implementation of the utility model, in the daily state, the concrete baffle 2 and the lead protective layer 5 are provided to form a radiation barrier to effectively block radiation;
[0046] When the mechanical pressure relief device 3 is opened, the concrete baffle 2 and the pressure relief hole 4 together form an air passage, which can effectively and safely release the indoor pressure to the outdoors. At the same time, the concrete baffle 2 and the lead protective layer 5 can still safely and effectively prevent radiation leakage.
[0047] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A pressure relief vent for preventing radiation leakage, characterized in that: It comprises a radiation source (1), a concrete baffle (2), a mechanical pressure relief device (3) and a pressure relief hole (4); The radiation source (1) is arranged on the floor of a room, a pressure relief hole (4) is arranged on the wall (6) of the room, a concrete baffle (2) is arranged on the wall (6) at the pressure relief hole (4) to form an air flow maze, the radiation source (1) is connected to the air flow maze, the concrete baffle (2) has an L-shaped cross section, the concrete baffle (2) is covered with a lead sheet protective layer (5) and its opening direction faces upward; A mechanical pressure relief device (3) is provided on a side of the pressure relief hole (4) away from the concrete baffle (2).
2. A radiation-proof pressure relief vent according to claim 1, characterized in that: The central axis of the radiation source (1) is consistent with the central axes of the concrete baffle (2) and the pressure relief hole (4).
3. The radiation-proof pressure relief vent according to claim 1, characterized in that: The pressure relief hole (4) is located at more than 2 / 3 of the net height of the room wall (6).
4. The radiation-proof pressure relief vent according to claim 1, characterized in that: The pressure relief hole (4) is a rectangular structure, and the concrete baffle (2) is compatible with the pressure relief hole (4).
5. The radiation-proof pressure relief vent according to claim 1, characterized in that: The concrete baffle (2) is a structure with three side openings; the length of the concrete baffle (2) is greater than the length of the pressure relief hole (4); and the height of the concrete baffle (2) is greater than the height of the pressure relief hole (4).