Oral cavity X-ray machine room for residential building and design method

Abstract

The invention relates to an oral X-ray machine room for a residential building, a design method and a fixed machine room, an oral X-ray machine is mounted in a closed space formed by M mounting surfaces, and M is a positive integer and is greater than or equal to 6; the partition plate is arranged in the fixed machine room, is parallel to the mounting surface and is at least a meters away from the mounting surface, the interval between the partition plate and the mounting surface forms an interlayer, and a is a natural number greater than or equal to 0; and the detection port is arranged on the mounting surface, is communicated with the interlayer and the outer side of the fixed machine room, and is used for detecting the radiation level in the interlayer through the detection port. The technical problem that the oral clinics are difficult to operate normally due to the fact that the neighbors in the residential building do not cooperate with radioactive examination is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ray detection, and in particular to an oral X-ray room for residential buildings and a design method thereof. Background Art

[0002] With the vigorous development of the dental industry, a large number of dental clinics have emerged. Influenced by the high and low rent prices, some dental clinics are set up in residential buildings or in commercial housing at the bottom of residential buildings. In the process of diagnosing diseases, dental clinics will use oral X-ray machines for film diagnosis.

[0003] Since X-ray machines emit radioactive radiation, in order to avoid affecting the health of surrounding residents, it is necessary to cooperate with the completion acceptance department to conduct regular radioactive inspections. During the radioactive inspection, it is necessary to conduct radioactive inspections on the upper, lower, left, and right spaces of the room where the X-ray machine is located. However, some dental clinics are located in residential buildings, and the upper, lower, left, and right spaces of the room where the X-ray machine is located are all neighbors' houses. Neighbors often resist the installation of equipment due to their fear of ionizing radiation and refuse to allow the completion acceptance department to conduct home inspections. This makes it difficult for the equipment to pass the approval of relevant departments and thus cannot operate normally.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The invention discloses an oral X-ray machine room for a residential building and a design method thereof, aiming to solve the technical problems existing in the prior art.

[0006] The present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides an oral X-ray machine room for a residential building, comprising: a fixed machine room, which is a closed space composed of M mounting surfaces, in which an oral X-ray machine is installed, wherein M is a positive integer greater than or equal to 6; a partition plate, which is arranged in the fixed machine room, parallel to the mounting surface, and at least a meters away from the mounting surface, and the interval between the partition plate and the mounting surface forms a partition layer, wherein a is a natural number greater than or equal to 0; a detection port, which is arranged on the mounting surface and connected to the partition layer and the outside of the fixed machine room, and is used to detect the radiation level in the partition layer through the detection port.

[0008] Preferably, there are N partitions, which are respectively installed in the fixed machine room and have neighbors on one side, wherein N is a positive integer and is less than or equal to M.

[0009] Preferably, the shielding degree of the partition is at least 2 mmPb.

[0010] Preferably, the partition is made of barium sulfate board.

[0011] Preferably, the cross-sectional area of ​​the detection port is at least 0.4 square meters.

[0012] Preferably, a protective lead plate is installed on the installation surface and arranged at the detection port to block the partition from the outside of the fixed machine room, and the cross-sectional area of ​​the protective lead plate is greater than or equal to the cross-sectional area of ​​the detection port.

[0013] Preferably, the beautifying outer panel is installed on the surface of the partition and is located on the side of the partition facing the oral X-ray machine.

[0014] On the other hand, the present invention also provides a design method for an oral X-ray machine room, which is applied to an oral X-ray machine room for a residential building, and the method includes: installing an oral X-ray machine in a fixed machine room; prefabricating partitions; installing the partitions in the fixed machine room, the partitions and the mounting surface of the fixed machine room forming a partition; opening a detection port on the mounting surface of the fixed machine room, connecting the partition with the outside of the fixed machine room; using a radiation detection device to detect the radiation level in the partition, and completing the design of the oral X-ray machine room when the radiation level is less than a preset requirement.

[0015] Optionally, the prefabricated partition includes: determining the installation surface with a neighboring side in the fixed machine room; obtaining the side length corresponding to the installation surface; determining the spacing distance between the installation surface and the partition layer of the partition; determining the side length corresponding to the partition based on the spacing distance and the side length corresponding to the installation surface; and prefabricating the partition based on the side length corresponding to the partition.

[0016] Optionally, the method further includes: when the number of the mounting surfaces is greater than the number of the partitions, applying a barium sulfate coating to the mounting surfaces on which the partitions are not mounted.

[0017] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0018] The present invention mainly provides an oral X-ray machine room for residential buildings, including a fixed machine room, a closed space composed of M mounting surfaces, an oral X-ray machine installed inside, wherein M is a positive integer, and M is greater than or equal to 6; a partition plate is arranged in the fixed machine room, parallel to the mounting surface, and at least a meters away from the mounting surface, and the interval between the partition plate and the mounting surface forms a partition layer, wherein a is a natural number greater than or equal to 0; a detection port is arranged on the mounting surface, and is connected to the partition layer and the outside of the fixed machine room, and is used to detect the radiation level in the partition layer through the detection port. The purpose of forming a partition layer between the partition plate and the mounting surface and detecting the radiation level in the partition layer through the detection port is achieved, thereby achieving the technical effect of completing radiation detection without the cooperation of neighbors in the residential building, thereby solving the technical problem that it is difficult for the oral clinic to operate normally due to the non-cooperation of neighbors in the residential building with radioactive inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the main structure of an oral X-ray room for a residential building in Example 1 of the present invention;

[0021] Figure 2 This is a flow chart of a design method for an oral X-ray room in Example 2 of the present invention.

[0022] Description of reference numerals:

[0023] 1. Fixed machine room; 2. Partition; 3. Partition; 4. Installation surface; 5. Inspection port; 6. Beautification of outer panel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a magnetic 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.

[0026] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In order to solve the problems existing in the prior art, the embodiments of the present application provide an oral X-ray room and a design method for a residential building.

[0028] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention are explained below:

[0029] An extraoral imaging system is an instrument used for dental X-ray photography. It can take images of teeth in the oral cavity by emitting X-rays to photograph them.

[0030] The oral X-ray machine room for a residential building of the present invention is used to solve the technical problem that it is difficult for an oral clinic to operate normally because neighbors in the residential building do not cooperate with radioactive examinations.

[0031] Example 1

[0032] This embodiment provides an oral X-ray room for a residential building, such as Figure 1 As shown, it includes: a fixed machine room 1, a closed space composed of M mounting surfaces 4, in which an oral X-ray machine is installed, wherein M is a positive integer, and M is greater than or equal to 6; a partition 3, arranged in the fixed machine room 1, parallel to the mounting surface 4, and at least a meters away from the mounting surface 4, the interval between the partition 3 and the mounting surface 4 forms a partition 2, wherein a is a natural number greater than or equal to 0; a detection port 5, arranged on the mounting surface 4, and connected to the partition 2 and the outside of the fixed machine room 1, for detecting the radiation level in the partition 2 through the detection port 5.

[0033] Optionally, a room in a residential building is selected as the fixed machine room 1. The number of installation surfaces 4 of the fixed machine room 1 depends on the number of walls in the room in the residential building, which is generally six walls, but there are a small number of rooms with seven walls or even more. Taking six walls as an example, they include a top plate, a floor, and four vertical walls, so M is greater than or equal to 6. In order to ensure that the oral X-ray machine installed in the residential building does not affect the health of the residents, it is necessary to isolate the radiation generated by the oral X-ray machine. In general, a concrete structure with a thickness of more than 200 mm can form a barrier to the radiation generated by the oral X-ray machine, that is, after the walls of the residential building rooms block the radiation generated by the oral X-ray machine, the radiation impact on the residents can be ignored.

[0034] Optionally, since the residents do not cooperate with radiation detection, it is necessary to isolate the oral X-ray machine by setting up a partition 3, and provide a partition 2 between the partition 3 and the mounting surface 4, so as to measure the radiation level in the partition 2. When the radiation level in the partition 2 reaches the radiation requirements recorded in the "Radiation Protection Requirements for Radiological Diagnosis" (GBZ130-2020), it means that the residents' room on the other side of the mounting surface 4 also meets the radiation requirements.

[0035] Optionally, the partition 3 is at least a meter away from the mounting surface 4, that is, the width of the partition 2 is at least a meter. This method facilitates the detection personnel to place the radiation protection detection equipment in the partition 2 and measure the radiation level in the partition 2. Among them, in actual applications, a meter is 1.3 meters. Since there are certain distance requirements between the radiation protection detection equipment and the shielding body, it is generally 1 meter above and 0.3 meters around. In addition, the radiation protection detection equipment itself has certain length requirements. If the width of the partition 2 is small, the detection distance between the radiation protection detection equipment and the partition 2 may not meet the standard requirements. If the width of the partition 2 is set too large, there will be a problem of space waste. Therefore, the partition 3 is at least 1.3 meters away from the mounting surface 4, which effectively achieves the effect of balancing the space cost and facilitating the detection of detection personnel.

[0036] Optionally, it is necessary to detect the radiation level in the partition 2. For example, after the partition 3 is dismantled, the inspector enters the partition 2 and then installs the partition 3 for inspection. This is time-consuming and labor-intensive, and cannot be completed alone when the number of inspectors is insufficient. Therefore, a detection port 5 is provided for the partition 2 to facilitate entry and exit, that is, a detection port 5 is opened on the installation surface 4 for the inspector to enter the partition 2. The detection port 5 is provided on the installation surface 4, so that the partition 2 can directly lead to the outside of the fixed machine room 1, effectively avoiding the risk of radiation when entering the fixed machine room 1. In addition, the radiation level in the fixed machine room 1 is relatively high. If the detection port 5 is opened on the partition 3, the radiation in the fixed machine room 1 may enter the partition 2 through the opening on the partition 3. In order to effectively reduce the radiation level in the partition 2, it is necessary to ensure the completeness of the partition 3, so the detection port 5 is opened on the installation surface 4 connected to the partition 2.

[0037] Optionally, by setting up the partition 2, the radiation barrier status can be measured without going to the neighbor's house, thereby achieving the purpose of forming the partition 2 between the partition 3 and the installation surface 4, and detecting the radiation level in the partition 2 through the detection port 5, thereby achieving the technical effect of completing radiation detection without the cooperation of neighbors in the residential building, and further solving the technical problem that the dental clinic is difficult to operate normally due to the neighbors in the residential building not cooperating with the radioactive inspection.

[0038] In some preferred embodiments, N partitions 3 are provided, and the N partitions 3 are respectively installed in the fixed machine room 1 and have neighbors on one side, wherein N is a positive integer and N is less than or equal to M.

[0039] Optionally, the production and installation of the partition 3 require a certain cost. For the side of the fixed machine room 1 where there is a neighbor, in order to avoid the neighbor's non-cooperation with the detection, the partition 3 can be used to form the partition 2, but for the side without a neighbor, in order to reduce the cost, the partition 3 may not be installed. For example, in a residential building, there are generally neighbors upstairs, but there may not be neighbors on the opposite side of the vertical wall. In this case, only the partition 3 on the top plate needs to be installed, which effectively achieves the effect of reducing the cost of the partition 3.

[0040] Optionally, the fixed machine room 1 is the setting place of the oral X-ray machine. After the surrounding walls are shielded by radiation, in order to install the oral X-ray machine in the fixed machine room 1, the minimum single side length of the fixed machine room 1 is not less than 2m, and the minimum effective use area is not less than 5 square meters, so that the fixed machine room 1 after the isolation board is installed can also install the oral X-ray machine. In order to control the rental cost, the area of ​​the fixed machine room 1 can be less than 10 square meters, which can effectively control the cost while completing the installation and use of the oral X-ray machine.

[0041] In some preferred embodiments, the shielding degree of the partition 3 is at least 2 mmPb.

[0042] Optionally, the partition 3 can isolate the radiation emitted by the oral X-ray machine, so that the radiation intensity at the partition 2 is lower than the safe radiation intensity. To ensure that the radiation intensity at the partition 2 is lower than the safe intensity after the partition 3 is isolated, the partition 3 needs to be more than 1mm thick and the shielding degree is at least 2mmPb to effectively isolate the radiation. However, since an overly thick partition 3 may increase the installation cost, a 1mm thick partition 3 can be used to effectively achieve the effect of safety protection while reducing costs.

[0043] In some preferred embodiments, the material of the partition 3 is a barium sulfate board.

[0044] Optional, commonly used radiation protection materials include lead plates, barium sulfate concrete, protective clothing, carbon fiber composite materials, etc. Among the above materials, lead plates are metal plates and have a higher cost than barium sulfate; protective clothing and carbon fiber composite materials are generally used directly as human body protection clothes for the protection of a single person, so choosing a plate made of barium sulfate as the partition 3 can effectively reduce the cost of use while isolating radiation.

[0045] In some preferred embodiments, the cross-sectional area of ​​the detection port 5 is at least 0.4 square meters.

[0046] Optionally, the detection port 5 is a passage for the radiation protection detection equipment and the detection personnel to enter and exit. The opening of the detection port 5 needs to at least ensure that the detection personnel can enter. Under normal circumstances, the minimum caliber that the human body can enter and exit is 0.4 square meters, so the minimum cross-sectional area of ​​the detection port 5 at this location is 0.4 square meters. In order to facilitate entry and exit, the cross-sectional area of ​​the detection port 5 can be appropriately enlarged, but the enlarged cross-sectional area cannot exceed the area where the mounting surface 4 in the interlayer 2 is located. It should be noted that the cross-sectional area at the detection port 5 is the area of ​​the passage for detection personnel to enter and exit at the detection port 5.

[0047] In some preferred embodiments, a protective lead plate is installed on the mounting surface 4 and is disposed at the detection port 5 to block the partition 2 from the outside of the fixed machine room 1 , and a cross-sectional area of ​​the protective lead plate is greater than or equal to a cross-sectional area of ​​the detection port 5 .

[0048] Optionally, the barrier 2 isolated by the insulating layer may have radiation isolation that is not within the safe range. If this happens, there is a large amount of radiation in the barrier 2, which may spread to the outside of the fixed machine room 1 through the detection port 5. Under long-term influence, it will damage the health of the surrounding personnel, so the detection port 5 needs to be temporarily closed and will only be opened when there are inspection personnel. A protective lead plate with radiation protection function is used to seal the detection port 5, so that the detection port 5 is blocked. Even if there is a large amount of radiation in the barrier 2, it cannot spread to the outside of the fixed machine room 1 through the detection port 5.

[0049] Optionally, since the cross-sectional area at the detection port 5 is only 0.4 square meters, the area is relatively small, so the material used for the baffle (protective lead plate) is also very small, so the cost difference between the materials can be ignored. At this time, the most protective lead plate is used. The lead plate is made of metal and has the excellent properties of high density, soft texture, and not easily penetrated by radiation, which effectively achieves the isolation of radiation diffusing outward from the detection port 5.

[0050] In some preferred embodiments, the beautifying outer panel 6 is installed on the surface of the partition 3 and is located on the side of the partition 3 facing the oral X-ray machine.

[0051] Optionally, the partition 3 is made of barium sulfate board, which is not the appearance of the wall panel commonly used in residential buildings, resulting in the unsightly appearance of the fixed machine room 1. People entering the fixed machine room 1 may have the idea that the dental clinic is not formal. To avoid the above situation, a beautifying outer panel 6 is installed on the surface of the partition 3 and on one side of the oral X-ray machine, so that people entering the fixed machine room 1 perceive that it is the same room in the residential building, which effectively beautifies the internal appearance of the fixed machine room 1.

[0052] Through the above-mentioned embodiment, the purpose of forming the partition 2 between the partition 3 and the installation surface 4 and detecting the radiation level in the partition 2 through the detection port 5 is achieved, thereby achieving the technical effect of completing the radiation detection without the cooperation of the neighbors in the residential building, and further solving the technical problem that the dental clinic is difficult to operate normally due to the neighbors in the residential building not cooperating with the radioactive inspection.

[0053] Example 2

[0054] According to an embodiment of the present invention, there is also provided an embodiment of a method for designing the above-mentioned oral X-ray room for a residential building. Figure 2 FIG. 1 is a flow chart of a method for designing an oral X-ray room in Embodiment 2 of the present invention. Figure 2 As shown, the design method of the above-mentioned oral X-ray room includes:

[0055] Step S1, installing an oral X-ray machine in a fixed machine room 1;

[0056] Step S2, prefabricating the partition 3;

[0057] Step S3, installing the partition 3 in the fixed machine room 1, the partition 3 and the installation surface 4 of the fixed machine room 1 form a partition 2;

[0058] Step S4, opening a detection port 5 on the installation surface 4 of the fixed machine room 1 to connect the partition 2 with the outside of the fixed machine room 1;

[0059] Step S5, using a radiation detection device to detect the radiation level in the partition 2, and when the radiation level is less than the preset requirement, the design of the oral X-ray room is completed.

[0060] Optionally, the oral X-ray machine can be installed first in the fixed machine room 1, and then the partition 3 can be installed. This method allows the size of the partition 2 isolated by the partition 3 to be determined according to the position of the oral X-ray machine after the oral X-ray machine is installed. For the installation surface 4 close to the oral X-ray machine, the space of the partition 2 can be appropriately reduced, so that the space around the oral X-ray machine can be controlled.

[0061] Optionally, the partition 3 may be prefabricated and installed first, and then the oral X-ray machine may be installed. When installing the partition 3, it is necessary to consider the range of movement of the oral X-ray machine and reserve a certain amount of installation space (i.e., the space is greater than 5 square meters). When installing the partition 3 in this way, there is no oral X-ray machine in the fixed machine room 1, so there will be no problem of accidentally bumping into the oral X-ray machine when installing the partition 3, and the construction personnel can have a larger space to adjust the position of the partition 3. After installing the partition 3, the oral X-ray machine is moved into the fixed machine room 1 for installation, which effectively makes it more convenient for the construction personnel to install the partition 3.

[0062] In some preferred embodiments, the prefabricated partition 3 includes: determining a mounting surface 4 with a neighboring side in a fixed machine room 1; obtaining a side length corresponding to the mounting surface 4; determining a spacing distance of the partition layer 2 between the mounting surface 4 and the partition 3; determining a side length corresponding to the partition 3 based on the spacing distance and the side length corresponding to the mounting surface 4; and prefabricating the partition 3 based on the side length corresponding to the partition 3.

[0063] Optionally, the prefabricated partition 3 requires sufficient measurement and calculation. If the area of ​​the partition 3 is smaller than the area of ​​the mounting surface 4, a gap may be left between the partition 3 and the vertical mounting surface 4, causing radiation to enter the partition 2 through the gap. If the area of ​​the partition 3 is larger than the area of ​​the mounting surface 4, the partition 3 cannot be installed and needs to be re-cut.

[0064] In some preferred embodiments, the method further comprises: when the number of mounting surfaces 4 is greater than the number of partitions 3 , applying a barium sulfate coating to the mounting surfaces 4 on which the partitions 3 are not mounted.

[0065] Optionally, partitions 3 are made only on the neighbor side of the fixed machine room 1. For example, if there is a neighbor above the fixed machine room 1, partitions 3 are only set on the top plate of the fixed machine room 1. At this time, the number of partitions 3 is less than the number of installation surfaces 4. To ensure the radiation protection effect, if partitions 3 are only set on the top plate, other installation surfaces 4 are not protected. It is possible that the original concrete walls of other installation surfaces 4 cannot effectively isolate radiation. Therefore, it is necessary to apply barium sulfate coating to other installation surfaces 4 except the top plate, thereby effectively realizing radiation protection for other installation surfaces 4.

[0066] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An oral X-ray room for a residential building, characterized in that: include: A fixed machine room (1), a closed space consisting of M mounting surfaces (4), wherein an oral X-ray machine is mounted inside, wherein M is a positive integer and is greater than or equal to 6; A partition (3) is arranged in the fixed machine room (1), parallel to the installation surface (4), and at least a meter away from the installation surface (4), and the interval between the partition (3) and the installation surface (4) forms a partition (2), wherein a is a natural number greater than or equal to 0; A detection port (5) is arranged on the installation surface (4) and is connected to the partition (2) and the outside of the fixed machine room (1), and is used to detect the radiation level in the partition (2) through the detection port (5).

2. The oral X-ray room for residential buildings according to claim 1, characterized in that: The partitions (3) are provided in N numbers, and the N partitions (3) are respectively installed in the fixed machine room (1) and have a neighboring side, wherein N is a positive integer and is less than or equal to M.

3. The oral X-ray room for residential buildings according to claim 1, characterized in that: The shielding degree of the partition (3) is at least 2 mmPb.

4. An oral X-ray room for residential buildings according to claims 1-3, characterized in that: The material of the partition (3) is a barium sulfate plate.

5. The oral X-ray room for residential buildings according to claim 1, characterized in that: The cross-sectional area of ​​the detection port (5) is at least 0.4 square meters.

6. The oral X-ray room for residential buildings according to claim 5, characterized in that: A protective lead plate is installed on the installation surface (4) and is arranged at the detection port (5) to block the partition (2) from the outside of the fixed machine room (1); the cross-sectional area of ​​the protective lead plate is greater than or equal to the cross-sectional area of ​​the detection port (5).

7. The oral X-ray room for residential buildings according to claim 1, characterized in that: The beautifying outer panel (6) is mounted on the surface of the partition (3) and is located on the side of the partition (3) facing the oral X-ray machine.

8. A method for designing an oral X-ray room, characterized in that: Applied to an oral X-ray room for a residential building as described in claims 1-7, the method comprises: Installing an oral X-ray machine in a fixed machine room (1); Prefabricated partitions (3); The partition plate (3) is installed in the fixed machine room (1), and the partition plate (3) and the installation surface (4) of the fixed machine room (1) form a partition layer (2); A detection port (5) is provided on the installation surface (4) of the fixed machine room (1) to connect the partition (2) with the outside of the fixed machine room (1); A radiation detection device is used to detect the radiation level in the partition (2), and when the radiation level is less than a preset requirement, the design of the oral X-ray room is completed.

9. The method according to claim 8, characterized in that The prefabricated partition (3) comprises: Determining the installation surface (4) on the neighboring side in the fixed machine room (1); Obtaining the side length corresponding to the mounting surface (4); Determining the spacing distance between the mounting surface (4) and the spacing layer (2) of the partition (3); Determining the side length corresponding to the partition (3) based on the spacing distance and the side length corresponding to the mounting surface (4); The partition (3) is prefabricated based on the corresponding side length of the partition (3).

10. The method according to claims 8-9, characterized in that: The method further comprises: When the number of the mounting surfaces (4) is greater than the number of the partitions (3), a barium sulfate coating is applied to the mounting surfaces (4) on which the partitions (3) are not mounted.

Images