Sampling head of air sampler

Abstract

The invention belongs to the technical field of air samplers, and particularly relates to a sampling head of an air sampler. The sampling head comprises a body and an annular buckle, the body is of a hollow structure, and the annular buckle is fixed to the upper portion of the body and used for fixing the filter membrane to the upper end face of the body. The lower part of the body is provided with a lower thread for connecting a sampler; a supporting framework for supporting the filter membrane is fixed in the upper end surface of the body, and the contact part of the supporting framework and the filter membrane is point-shaped. The distribution range of particulate matters, aerosol and the like in air on the filter membrane is effectively expanded, the uniformity of atmospheric sampling is improved, and the filter membrane mounting requirements under different working conditions are met.

Description

Technical Field

[0001] The present application belongs to the technical field of atmospheric samplers, and in particular relates to a sampling head of an atmospheric sampler. Background Art

[0002] At present, atmospheric sampling usually includes membrane capture method or liquid absorption method. Among them, the sampling of atmospheric uranium and atmospheric fluorine all adopts membrane capture method. Therefore, the uniformity of sampling will significantly affect the accuracy of subsequent analysis and detection.

[0003] The sampling heads of existing medium and large flow atmospheric samplers are usually copper metal structures with a heavy overall weight; the supporting structure is a metal honeycomb structure, and the effective area / support area ratio needs to be further improved to improve the uniformity of atmospheric samples and provide guarantees for subsequent analysis and testing. Summary of the invention

[0004] The purpose of this application is to provide a sampling head for an atmospheric sampler to solve the problem in the prior art that the effective area / support area ratio needs to be further improved.

[0005] Technical solution to achieve the purpose of this application:

[0006] The embodiment of the present application provides a sampling head for an atmospheric sampler, the sampling head comprising: a body and a ring buckle;

[0007] The body is a hollow structure, and a ring buckle is fixed to the upper part of the body, which is used to fix the filter membrane on the upper end surface of the body; the lower part of the body is provided with a lower thread for connecting the sampler;

[0008] A supporting frame for supporting the filter membrane is fixed inside the upper end surface of the main body, and the contact point between the supporting frame and the filter membrane is point-shaped.

[0009] Optionally, the support frame includes a plurality of support blades distributed in an annular shape;

[0010] The upper end surface of the supporting blade has a plurality of continuously arranged inward-concave arc structures, forming a bridge-like mechanical design, and the connection points between each inward-concave arc structure support the filter membrane.

[0011] Optionally, the lower portion of the supporting blade is arched in design, with hollow holes on both sides.

[0012] Optionally, there are 4 to 12 support blades in total, and one side of the plurality of support blades is welded to a point, and the other side is welded to the inner wall of the upper end of the body.

[0013] Optionally, the annular fastener is fixed to the main body by locking, or the annular fastener is fastened to the main body by threads.

[0014] Optionally, when the ring buckle is fixed to the main body by locking, two square clamping blocks are symmetrically arranged at both ends of the ring buckle, and two square grooves for fixing the square clamping blocks are opened on the upper part of the main body.

[0015] Optionally, when the annular fastener is fastened to the main body via threads, an upper thread is provided on the outer wall of the upper end of the main body.

[0016] Optionally, a lower groove is provided on the upper portion of the lower thread for accommodating a sealing gasket.

[0017] Optionally, an upper groove is further provided on the upper portion of the lower groove.

[0018] The beneficial technical effects of this application are:

[0019] The embodiment of the present application provides a sampling head for an atmospheric sampler, which includes: a body and a ring buckle; the body is a hollow structure, the ring buckle is fixed to the upper part of the body, and is used to fix the filter membrane at the upper end surface of the body; the lower part of the body is provided with a lower thread for connecting the sampler; a support frame for supporting the filter membrane is fixed inside the upper end surface of the body, and the contact point between the support frame and the filter membrane is point-shaped. The contact point between the support frame and the filter membrane is point-shaped, which effectively improves the distribution range of particulate matter, aerosols, etc. in the air on the filter membrane, improves the uniformity of atmospheric sampling, and meets the filter membrane installation requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a sampling head of an atmospheric sampler provided in an embodiment of the present application;

[0021] Figure 2a A schematic diagram of the structure of the contact between the support frame and the filter membrane in a sampling head of an atmospheric sampler provided in an embodiment of the present application;

[0022] Figure 2b It is a schematic diagram of the structure of the contact between the supporting frame and the filter membrane in the existing sampling head;

[0023] Figure 3 A schematic diagram of the structure of another atmospheric sampler sampling head provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a supporting blade in a sampling head of an atmospheric sampler provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of a ring buckle in a sampling head of an atmospheric sampler provided in an embodiment of the present application.

[0026] In the figure:

[0027] 1-main body; 2-ring buckle; 3-support frame; 4-square groove; 5-upper thread; 6-upper groove; 7-lower groove; 8-lower thread; 9-square block; 10-concave arc structure; 11-hollow hole; 12-support blade. DETAILED DESCRIPTION

[0028] In order to make those skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, not all. Based on the embodiments recorded in the present application, all other embodiments obtained by those skilled in the art without paying creative work are within the scope of protection of the present application.

[0029] See also Figure 1 and 3 , which is a schematic diagram of the structure of an atmospheric sampler sampling head provided in an embodiment of the present application.

[0030] An atmospheric sampler sampling head provided in an embodiment of the present application comprises: a body 1 and a ring fastener 2;

[0031] The body 1 is a hollow structure, and the annular buckle 2 is fixed to the upper part of the body 1, and is used to fix the filter membrane to the upper end surface of the body 1; the lower part of the body 1 is provided with a lower thread 8 for connecting the sampler;

[0032] A support frame 3 for supporting the filter membrane is fixed inside the upper end surface of the main body 1, and the contact point between the support frame 3 and the filter membrane is point-shaped.

[0033] In the embodiment of the present application, the contact point between the support frame 3 and the filter membrane is point-shaped, such as Figure 2a As shown, compared with the original honeycomb structure, Figure 2b As shown, the effective area / support area ratio is improved, achieving the function of improving sampling uniformity.

[0034] In some possible implementations of the embodiments of the present application, the support skeleton 3 includes a plurality of support blades 12 distributed in an annular shape;

[0035] like Figure 4 As shown, the upper end surface of the supporting blade 12 has a plurality of continuously arranged inward-concave arc structures 10, forming a bridge-like mechanical design, and the connection points between each inward-concave arc structure support the filter membrane.

[0036] It can be understood that the single supporting blade 12 has a bridge-like mechanical design, which increases the air passage area while ensuring sufficient supporting force.

[0037] In one example, the lower portion of the supporting blade 12 is arched, with hollow holes 11 formed on both sides.

[0038] It is understandable that the hollow hole 11 can reduce the weight of the support frame 3. The lower part of the support blade 12 is an arched design to ensure that the suspension angle of the structure is reduced during 3D printing to ensure that it can be produced without an additional support structure. At the same time, this design can reduce the weight of the support frame 3 to a certain extent. In specific implementation, the size of the arched design should be smaller than the size of the filter membrane to ensure the support effect on the filter membrane.

[0039] As an example, there are 4 to 12 support blades 12 in total, one side of the plurality of support blades 12 is welded to a point, and the other side is welded to the inner wall of the upper end of the body 1 .

[0040] In some possible implementations of the embodiments of the present application, the ring fastener 2 can be fixed to the main body 1 by means of a lock, or the ring fastener 2 can be fastened to the main body 1 by means of threads.

[0041] In an example, Figure 5 As shown, when the ring fastener 2 is fixed to the main body 1 by locking, two square blocks 9 are symmetrically arranged at both ends of the ring fastener 2, and two square grooves 4 for fixing the square blocks 9 are opened on the upper part of the main body 1.

[0042] It is understandable that when the square clamping block 9 is clamped in the square groove 4, the ring buckle 2 can be used to press the filter membrane.

[0043] In another example, when the ring fastener 2 is fastened to the main body 1 through threads, an upper thread 5 is formed on the outer wall of the upper end of the main body 1 .

[0044] It can be understood that when the annular fastener 2 is tightened through the upper thread 5, the filter membrane can be compressed.

[0045] In some possible implementations of the embodiments of the present application, a lower groove 7 is provided on the upper portion of the lower thread 8 for placing a sealing gasket for sealing the sampler interface.

[0046] In one example, an upper groove 6 is further provided above the lower groove 7 for placing a sealing gasket to adapt to samplers of different sizes.

[0047] The following describes in detail an atmospheric sampler sampling head provided in an embodiment of the present application with reference to a specific example.

[0048] When using the sampling head of an atmospheric sampler provided in an embodiment of the present application, first, place the filter membrane in the center of the support frame 3 located in the body 1, insert the square block 9 into the upper square groove 4, and use the ring buckle 2 to compact the filter membrane. Start the sampler for sampling. After sampling, remove the ring buckle and store the sampled filter membrane according to the specification.

[0049] The embodiment of the present application provides a sampling head for an atmospheric sampler, which includes: a body and a ring buckle; the body is a hollow structure, the ring buckle is fixed to the upper part of the body, and is used to fix the filter membrane at the upper end surface of the body; the lower part of the body is provided with a lower thread for connecting the sampler; a support frame for supporting the filter membrane is fixed inside the upper end surface of the body, and the contact point between the support frame and the filter membrane is point-shaped. The contact point between the support frame and the filter membrane is point-shaped, which effectively improves the distribution range of particulate matter, aerosols, etc. in the air on the filter membrane, improves the uniformity of atmospheric sampling, and meets the filter membrane installation requirements under different working conditions.

[0050] The present application is described in detail above in conjunction with the accompanying drawings and embodiments, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present application. Any content not described in detail in the present application can adopt the existing technology.

Claims

1. An atmospheric sampler sampling head, characterized in that: The sampling head comprises: a body (1) and a ring buckle (2); The body (1) is a hollow structure, and the annular buckle (2) is fixed to the upper part of the body (1) and is used to fix the filter membrane to the upper end surface of the body (1); the lower part of the body (1) is provided with a lower thread (8) for connecting a sampler; A support frame (3) for supporting the filter membrane is fixed inside the upper end surface of the main body (1), and the contact point between the support frame (3) and the filter membrane is point-shaped.

2. The atmospheric sampler sampling head according to claim 1, characterized in that: The support frame (3) comprises a plurality of support blades (12) distributed in an annular shape; The upper end surface of the supporting blade (12) has a plurality of continuously arranged inward-concave arc structures (10), forming a bridge-like mechanical design, and the connection points between each inward-concave arc structure (10) support the filter membrane.

3. The atmospheric sampler sampling head according to claim 2, characterized in that: The lower part of the supporting blade (12) is designed to be arched, and hollow holes (11) are opened on both sides.

4. The atmospheric sampler sampling head according to claim 2 or 3, characterized in that: There are 4 to 12 supporting blades (12) in total, one side of the plurality of supporting blades (12) is welded to a point, and the other side is welded to the inner wall of the upper end of the body (1).

5. The atmospheric sampler sampling head according to claim 1, characterized in that: The annular buckle (2) is fixed to the main body (1) by means of a locking buckle, or the annular buckle (2) is fastened to the main body (1) by means of a thread.

6. The atmospheric sampler sampling head according to claim 5, characterized in that: When the ring buckle (2) is fixed to the main body (1) by means of a locking buckle, two square clamping blocks (9) are symmetrically arranged at both ends of the ring buckle (2), and two square grooves (4) for fixing the square clamping blocks (9) are provided on the upper part of the main body (1).

7. The sampling head of the atmospheric sampler according to claim 5, characterized in that: When the annular buckle (2) is fastened to the main body (1) via the thread, an upper thread (5) is provided on the outer wall of the upper end of the main body (1).

8. The atmospheric sampler sampling head according to claim 1, characterized in that: A lower groove (7) is provided on the upper part of the lower thread (8) for placing a sealing gasket.

9. The atmospheric sampler sampling head according to claim 8, characterized in that: An upper groove (6) is also provided on the upper part of the lower groove (7).

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