An elemental analyzer measurement cell

Abstract

The utility model discloses an element analysis appearance measuring chamber belongs to industrial online element analysis technical field, this element analysis appearance measuring chamber, including first shielding layer, conveyer belt body and setting in the analysis appearance main part of first shielding layer. Through the optimization design of the conveyer belt body of material to realize the optimization design of material conveying path, to make the material loading and unloading port of conveyer belt body and set up on the first shielding layer for the opening of conveyer belt body to go out not on the same straight line, so that the material loading and unloading personnel will not stand on the main scattering direction of neutron, significantly reduce the radiation dose that this area operator suffers, guarantee the health and safety of workers.

Description

Technical Field

[0001] This utility model belongs to the field of industrial online elemental analysis technology, specifically relating to an elemental analyzer measurement chamber. Background Technology

[0002] Prompt Gamma Neutron Activation Analysis (PGNAA) is an important industrial online elemental analysis technique widely used in industries such as cement, coal, mining, and metallurgy. Its core principle involves bombarding materials with a neutron beam emitted from a neutron generator. The atomic nuclei in the material capture neutrons and release characteristic gamma rays. The elemental composition and content of the material are analyzed by detecting the energy and intensity of these gamma rays.

[0003] The analyzer is typically housed in a dedicated measurement chamber at the work site. Materials are analyzed by continuously or intermittently passing through the neutron beam region within the chamber via a conveyor belt. In traditional designs, the conveyor belt is often straight, with the material inlet and outlet located at opposite ends of the measurement chamber. Because the neutron beam emitted by the neutron generator propagates in a straight line, in a straight conveyor belt design, the inlet and outlet are located precisely on the extension of the neutron beam's propagation axis. Although the measurement chamber itself is shielded (e.g., with concrete, boron-containing polyethylene, lead plates, etc.), openings inevitably exist at the material loading / unloading ports (doors) to allow material to enter and exit. These openings inevitably leak radiation (primarily fast neutrons) propagating in a straight direction. Although the dose is attenuated by the shielding, the cumulative radiation exposure still poses a significant safety risk to workers who spend long periods near the inlet and outlet for loading, unloading, inspection, or maintenance, potentially causing serious health damage (such as increased cancer risk, impaired hematopoietic function, etc.). Traditional solutions mainly rely on increasing the thickness of local shielding or shortening the operation time, but this increases costs, reduces efficiency, or makes it difficult to completely eliminate risks. Utility Model Content

[0004] The purpose of this invention is to provide a measurement chamber for an elemental analyzer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an elemental analyzer measuring chamber, comprising: The first shielding layer defines a secludeable analysis zone within it; The main body of the analyzer is located within the analysis zone and includes a radiation assembly; Conveyor belt body, the conveyor belt body comprising: An intermediate section is disposed within the analysis interval, the intermediate section extending along the second direction and passing through the ray assembly; The first extension section is formed by extending from one end of the middle section outwards from the first shielding layer; The second extension segment is formed by extending from the end of the middle section away from the first extension segment outward from the first shielding layer, and the extension directions of both the first extension segment and the second extension segment deviate from the second direction.

[0006] Furthermore, the measurement chamber also includes a second shielding layer disposed within the analysis zone, and the X-ray assembly is disposed within the second shielding layer.

[0007] Furthermore, the ray assembly includes a neutron generator, a neutron moderator, and a gamma detector unit arranged sequentially along a first direction, and the intermediate section is located between the neutron moderator and the gamma detector unit in the first direction.

[0008] Furthermore, the end of the first extension segment away from the middle section and the end of the second extension segment away from the middle section are spaced apart in the second direction.

[0009] Furthermore, the conveyor belt is an annular belt with a notched structure.

[0010] Furthermore, the measuring chamber also includes loading and unloading equipment arranged at the location of the notch structure.

[0011] Furthermore, the measurement chamber also includes an equipment cabinet and an analysis cabinet located within the analysis area and connected to the main body of the analyzer.

[0012] Furthermore, the first shielding layer is a rectangular shielding layer, and the second direction is parallel to the width direction of the rectangular shielding layer.

[0013] Furthermore, the first shielding layer is a concrete layer, and the second shielding layer is made of polyethylene.

[0014] Furthermore, the measurement chamber also includes a radiation detector located within the analysis area.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This application optimizes the material conveying path by designing the conveyor belt, ensuring that the inlet and outlet of the conveyor belt are not aligned with the inlet and outlet of the first shielding layer. This prevents personnel from standing in the direct or main scattering direction of the neutron emission axis, significantly reducing the radiation dose received by operators in the area, protecting workers' occupational health and safety. Furthermore, it eliminates the need for overly complex or expensive additional shielding systems, making it easy to modify existing equipment or implement on new equipment at low cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the measuring chamber structure; Figure 2 This is a schematic diagram of the interior of the second shielding layer.

[0017] In the picture: 100. First shielding layer; 100a. First wall; 100b. Second wall; 101. Analysis area; 102. Inlet and outlet; 200. Second shielding layer; 300. X-ray assembly; 301. Neutron generator; 302. Neutron moderation unit; 303. Gamma detector unit; 400. Conveyor belt body; 400a. Intermediate section; 400b. First extension section; 400c. Second extension section; 401. Material loading point; 402. Material unloading point; 403. Notch structure; 500. Loading and unloading equipment; 501. Equipment cabinet; 502. Analysis cabinet; 503. Radiation detector. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] A measuring chamber for an elemental analyzer (hereinafter referred to as the measuring chamber), with reference to Figure 1 The main body consists of a first shielding layer 100 and an analyzer body (PGNAA analyzer). The first shielding layer 100 defines a closed analysis area 101 that accommodates the analyzer body. The first shielding layer 100 has an entrance / exit 102 for personnel to enter and exit, and a lead door is provided at the entrance / exit 102 to maintain the closure of the first shielding layer 100 during operation in the measurement room. For example, the first shielding layer 100 is a concrete layer. Correspondingly, in some embodiments, the analyzer body includes a second shielding layer 200 and a radiation assembly 300 disposed within the second shielding layer 200 and arranged along a first direction. The second shielding layer 200 is a shell structure made of polyethylene and boron-containing polyethylene materials. (Refer to...) Figure 2 The ray assembly 300 is located within the second shielding layer 200 along the first direction (i.e., Figure 1The direction perpendicular to the paper and outwards indicates that the measuring ray moves along the first direction during the measurement process. Specifically, the above-mentioned ray assembly 300 includes a neutron generator 301, a neutron moderation unit 302, and a gamma detector unit 303 arranged sequentially along the first direction. During the measurement process, the neutron generator 301 emits neutron rays, which are moderated into thermal neutrons by the neutron moderation unit 302. These neutrons then react with the material to be tested on the annular conveyor belt unit at an (n, γ) ratio. The generated gamma rays are detected by the gamma detector unit 303 and, after being processed by electronic devices, the signal is transmitted to the subsequent analysis cabinet 502 for elemental composition and content analysis.

[0020] In some embodiments, the measuring chamber further includes a conveyor belt assembly, which includes a conveyor belt body 400 and a drive structure (not shown) for driving the conveyor belt body 400 along a conveying path. Exemplarily, the drive structure includes components such as a drive motor, a drive roller, a driven roller, and a tension roller. The conveyor belt body 400 includes a middle section 400a disposed within the first shielding layer 100 and a first extension section 400b and a second extension section 400c extending outward from both ends of the middle section 400a. Correspondingly, the first shielding layer 100 forms openings at the points where the first extension section 400b and the second extension section 400c pass through, and provides telescopic baffles at the openings to keep the analysis interval 101 closed during non-operation periods. (Refer to...) Figure 1 and combined Figure 2 The intermediate section 400a of the conveyor belt 400 extends along the second direction and intersects with the X-ray assembly 300. That is, the intermediate section 400a is located between the neutron moderation unit 302 and the gamma detector unit 303 in the first direction, so that the material passes through the neutron radiation zone of the analyzer body during its movement along the conveyor belt 400, and is irradiated by the neutron flux at that position to generate characteristic gamma rays, thus completing elemental analysis.

[0021] Continue to refer to Figure 1 The extension directions of the first extension section 400b and the second extension section 400c deviate from the second direction. For example, the extension directions of some sections of the first extension section 400b and the second extension section 400c can be along an arc or perpendicular to the second direction. Based on this design, the loading and unloading ports of the conveyor belt 400 (i.e., the subsequent material loading point 401 and material unloading point 402) and the openings provided on the first shielding layer 100 for the conveyor belt 400 to pass through are not on the same straight line, so that the loading and unloading personnel will not stand in the main scattering direction of neutrons (i.e., the second direction), thereby reducing the radiation damage to the workers.

[0022] Continue to refer to Figure 1In the aforementioned conveyor belt body 400, the end of the first extension section 400b away from the intermediate section 400a constitutes a material loading point 401. Correspondingly, the end of the second extension section 400c away from the intermediate section 400a constitutes a material unloading point 402. That is, the two ends of the conveyor belt body 400 located outside the analysis interval 101 respectively constitute a material loading point 401 and a material unloading point 402. In some embodiments, the material loading point 401 and the material unloading point 402 are spaced apart in the second direction. In some examples, the conveyor belt body 400 is configured as an annular belt with a notch structure 403, that is, the first extension section 400b and the second extension section 400c are... All 400c are configured as arc-shaped belts, and the material loading point 401 and the material unloading point 402 are spaced a certain distance apart in the second direction to ensure that the material has enough stroke to complete the analysis. Corresponding to the material loading point 401 and the material unloading point 402, the above-mentioned measurement chamber also includes a loading and unloading device 500 arranged in the middle position of the material loading point 401 and the material unloading point 402 (i.e., the position of the notch structure 403). For example, the loading and unloading device 500 is a multi-degree-of-freedom industrial robotic arm. The robotic arm has both loading and unloading functions, and is used to grab materials from the external feeding line to the material loading point 401, and grab the measured materials from the material discharge port and place them on the external receiving line.

[0023] Continue to refer to Figure 1 The aforementioned measurement chamber also includes an equipment cabinet 501, an analysis cabinet 502, and a radiation detector 503, which are installed in the analysis section 101. For example, the equipment cabinet 501 and the analysis cabinet 502 are respectively installed on both sides of the entrance and exit 102 of the first shielding layer 100 to assist the normal operation of the main body of the analyzer and data processing. Correspondingly, the radiation detector 503 is used to monitor the radiation dose of the measurement chamber in real time.

[0024] In some embodiments, the first shielding layer 100 is a rectangular shielding layer. Correspondingly, the second direction is the width direction of the rectangular shielding layer, and the first direction is the height direction of the first shielding layer 100. Specifically, the first shielding layer 100 includes a first wall 100a and a second wall 100b spaced apart along its length. For example, the inlet and outlet 102 of the first shielding layer 100 is formed at the position of the first wall 100a, and the notch structure 403 of the conveyor belt body 400 is disposed adjacent to the second wall 100b. In some examples, the equipment cabinet 501 and the analysis cabinet 502 are disposed adjacent to the first wall 100a and are respectively located on both sides of the inlet and outlet 102 of the first shielding layer 100. Correspondingly, the radiation detector 503 is disposed adjacent to the second wall 100b.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A measuring chamber for an elemental analyzer, characterized in that, include: The first shielding layer (100) defines a closable analysis zone (101) within it. The main body of the analyzer is located within the analysis zone (101) and includes a radiation assembly (300). A conveyor belt body (400), the conveyor belt body (400) comprising: An intermediate section (400a) is disposed within the analysis interval (101), the intermediate section (400a) extending along the second direction and passing through the ray assembly (300). The first extension section (400b) is formed by extending from one end of the intermediate section (400a) outward from the first shielding layer (100); The second extension segment (400c) is formed by extending from the end of the middle section (400a) away from the first extension segment (400b) outward to the first shielding layer (100), and the extension directions of the first extension segment (400b) and the second extension segment (400c) are both deviated from the second direction.

2. The elemental analyzer measuring chamber according to claim 1, characterized in that: The measurement chamber also includes a second shielding layer (200) disposed within the analysis zone (101), and the X-ray assembly (300) is disposed within the second shielding layer (200).

3. The elemental analyzer measuring chamber according to claim 1, characterized in that: The radiation assembly (300) includes a neutron generator (301), a neutron moderator (302), and a gamma detector (303) arranged sequentially along a first direction, and the intermediate section (400a) is located between the neutron moderator (302) and the gamma detector (303) in the first direction.

4. The elemental analyzer measuring chamber according to claim 1, characterized in that: The first extension segment (400b) is positioned away from the middle section (400a) at one end, and the second extension segment (400c) is positioned away from the middle section (400a) at one end, in the second direction.

5. The elemental analyzer measuring chamber according to claim 4, characterized in that: The conveyor belt (400) is an annular belt with a notched structure (403).

6. The elemental analyzer measuring chamber according to claim 5, characterized in that: The measuring chamber also includes a loading and unloading device (500) located at the notch structure (403).

7. The elemental analyzer measuring chamber according to claim 1, characterized in that: The measurement chamber also includes an equipment cabinet (501) and an analysis cabinet (502) located in the analysis section (101) and connected to the main body of the analyzer.

8. The elemental analyzer measuring chamber according to claim 1, characterized in that: The first shielding layer (100) is a rectangular shielding layer, and the second direction is parallel to the width direction of the rectangular shielding layer.

9. The elemental analyzer measuring chamber according to claim 2, characterized in that: The first shielding layer (100) is a concrete layer, and the second shielding layer (200) is made of polyethylene.

10. The elemental analyzer measuring chamber according to claim 1, characterized in that: The measurement chamber also includes a radiation detector (503) located in the analysis area (101).

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