Efficient medium diffusion prevention sampling device

Abstract

The utility model relates to the technical field of sealed sampling, in particular to an efficient sampling device capable of preventing medium diffusion. The efficient medium diffusion prevention sampling device comprises a connecting flange A and a sampling pipeline, the connecting flange A is connected with a connecting flange B through a flexible pup joint, the flexible pup joint is located on the outer side of the sampling pipeline, the sampling pipeline is connected with a waste gas storage bag through a vacuum pump, and a sampling box is connected to the sampling pipeline. According to the device, the connecting flange A, the flexible short circuit, the connecting flange B, the gland flange and the sealing ring are matched for use, so that the sampling pipeline is always isolated from the outside in the sampling process, and a sampling medium is prevented from being diffused to a site; and through cooperative use of the vacuum pump and the waste gas storage bag, the sampling device can be prevented from being polluted before sampling, the sampling efficiency can be improved, and the sampling safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed sampling, in particular to a high-efficiency medium diffusion-proof sampling device. Background Art

[0002] Sampling refers to the process of extracting individuals or samples from the population. The sampling device is a device used to ensure that the sample is isolated from the external environment during the sampling process to prevent sample contamination and leakage. It is very important in many industries, especially in the fields of medicine, food, chemical industry and environmental monitoring, because sampling in these fields requires extremely high accuracy and sterility.

[0003] During the sampling process, the sampling medium is easy to diffuse into the on-site environment. The on-site environment is relatively harsh, and the sampling medium is harmful to the human body, especially volatile substances. In addition, during the sampling process, there is also the problem of easy contamination of the sampling device, and the pressure difference between the inside and outside is similar, so the sampling is slow. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a high-efficiency anti-medium diffusion sampling device. Through the coordinated use of connecting flange A, flexible short circuit, connecting flange B, pressure cover flange and sealing ring, the sampling pipeline is always kept isolated from the outside world during the sampling process, thereby preventing the sampling medium from diffusing to the scene; through the coordinated use of vacuum pump and exhaust gas storage bag, the sampling device can be kept from being contaminated before sampling, and the sampling efficiency can be improved, thereby improving the safety of sampling.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The high-efficiency anti-medium diffusion sampling device comprises a connecting flange A and a sampling pipeline. The connecting flange A is connected to the connecting flange B through a flexible short-circuit. The flexible short-circuit is located on the outside of the sampling pipeline. The sampling pipeline is connected to the exhaust gas storage bag through a vacuum pump. A sampling box is connected to the sampling pipeline.

[0007] The flexible short circuit is located below the connecting flange B, and a gland flange A and a gland flange B are provided above the connecting flange B.

[0008] The gland flange A and gland flange B are used together and are fastened by inserting bolts into the bolt holes.

[0009] The gland flange A is provided with bolt holes, a sealing gasket A is provided between the gland flange A and the gland flange B, a sealing gasket B is provided between the connecting flange B and the gland flange A, and the gland flange B and the gland flange A have the same structure.

[0010] The sampling pipe is provided with a sampling head, and the sampling pipe passes through the gland flange A, the gland flange B, the connecting flange B, the flexible short circuit and the connecting flange A in sequence from top to bottom.

[0011] A sealing ring is provided at the connection between the sampling pipeline and the gland flange A, and a sampler control valve is provided on the sampling pipeline. The sampler control valve is located between the sampling box and the sealing ring.

[0012] A primary vacuuming pipeline is connected between the sampling pipeline and the vacuum pump, and the sampling box is connected to the primary vacuuming pipeline through a secondary vacuuming pipeline.

[0013] The sampling pipeline is mostly a circular device. Install the gland flange A and gland flange B on the circumference of the sampling pipeline, install the sealing gasket A, tighten the bolts through the bolt holes, and clamp the sampling pipeline through the gland flange A and gland flange B; there are 2 bolt holes on the gland flange A and gland flange B, which are fixed on the connecting flange B. The connecting flange A is installed on the sampling port of the device through bolts to achieve Figure 3 Effect: After assembly, connect the connecting flange to the sampling port flange of the device through bolts, turn on the vacuum pump, extract the impurity gas in the sampling box and the sampling pipeline into the waste gas storage bag, close the sampler control valve and the vacuum pump, so that the sampling box is in a negative pressure state, open the valve of the sampling port, because the flexible short circuit is compressible, according to the sampling requirements, extend the sampler to a certain depth, start sampling, after sampling, take out the sampling pipeline, close the sampling port valve, remove the connecting flange, and the sampling is completed. Among them, the gland flange A and the gland flange B are used together, and the bolts are inserted into the bolt holes for tightening.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By adopting the high-efficiency anti-medium diffusion sampling device of the utility model, the sampling pipeline is always kept isolated from the outside world during the sampling process through the coordinated use of the connecting flange A, the flexible short circuit, the connecting flange B, the pressure cover flange and the sealing ring, thereby preventing the sampling medium from diffusing to the scene; by the coordinated use of the vacuum pump and the exhaust gas storage bag, the sampling device can be kept from being contaminated before sampling, and the sampling efficiency can be improved, thereby improving the safety of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model's high-efficiency medium diffusion-proof sampling device;

[0017] Figure 2 It is a schematic diagram of the structure of the gland flange A and the gland flange B of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure after the flexible short circuit of the utility model is connected with the upper and lower structures;

[0019] In the figure: 1. connecting flange A; 2. flexible short circuit; 3. connecting flange B; 41. gland flange A; 42. gland flange B; 5. sealing gasket A; 6. bolt hole; 7. sealing gasket B; 8. sampling box; 9. sampling pipeline; 10. sampling head; 11. sampler control valve; 12. sealing ring; 13. vacuum pump; 14. waste gas storage bag; 15. secondary vacuum pipeline; 16. primary vacuum pipeline. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] Example 1

[0022] like Figure 1 As shown, the high-efficiency anti-medium diffusion sampling device includes a connecting flange A1 and a sampling pipeline 9. The connecting flange A1 is connected to the connecting flange B3 through a flexible short-circuit 2. The flexible short-circuit 2 is located outside the sampling pipeline 9. The sampling pipeline 9 is connected to the exhaust gas storage bag 14 through a vacuum pump 13. The sampling pipeline 9 is connected to a sampling box 8. The flexible short-circuit 2 is located below the connecting flange B3. A gland flange A41 and a gland flange B42 are provided above the connecting flange B3. Figure 2-3 As shown, a bolt hole 6 is provided on the gland flange A41, a sealing gasket A5 is provided between the gland flange A41 and the gland flange B42, a sealing gasket B7 is provided between the connecting flange B3 and the gland flange A41, and the gland flange B42 has the same structure as the gland flange A41. The gland flange A41 and the gland flange B42 are used together, and the bolts are inserted into the bolt holes 6 for fastening. A sampling head 10 is provided on the sampling pipeline 9, and the sampling pipeline 9 passes through the gland flange A41, the gland flange B42, the connecting flange B3, the flexible short circuit 2, and the connecting flange A1 from top to bottom. A sealing ring 12 is provided at the connection between the sampling pipeline 9 and the gland flange A, and a sampler control valve 11 is provided on the sampling pipeline 9, and the sampler control valve 11 is located between the sampling box 8 and the sealing ring 12. A primary vacuum pipeline 16 is connected between the sampling pipeline 9 and the vacuum pump 13, and the sampling box 8 is connected to the primary vacuum pipeline 16 through a secondary vacuum pipeline 15.

[0023] The above-mentioned high-efficiency anti-medium diffusion sampling device, when in operation, comprises the following steps:

[0024] (1) The sampling pipe 9 is mostly a circular device. Install the gland flange A41 and the gland flange B42 to the circumference of the sampling pipe, install the sealing gasket A5, tighten the bolts through the bolt holes 6, and clamp the sampling pipe 9 through the gland flange A41 and the gland flange B42; (2) There are two bolt holes on the gland flange A41 and the gland flange B42, which are fixed on the connecting flange B3. The connecting flange A1 is installed on the sampling port of the device through bolts to achieve Figure 3 Effect; (3) After the assembly is completed, the connecting flange A1 is connected to the sampling port flange of the device by bolts, and the vacuum pump 13 is turned on to draw the impurity gas in the sampling box 8 and the sampling pipe 9 into the waste gas storage bag 14. The sampler control valve 11 and the vacuum pump 13 are closed to make the sampling box 8 in a negative pressure state. The valve of the sampling port is opened. Since the flexible short circuit 2 is compressible, according to the sampling requirements, the sampling head 10 is extended to a certain depth, the sampler control valve 11 is opened, and sampling begins. After the sampling is completed, the sampling tube 9 is taken out, the sampling port valve is closed, and the connecting flange A1 is removed. The sampling is completed.

Claims

1. A high-efficiency medium diffusion-proof sampling device, characterized in that: The invention comprises a connecting flange A (1) and a sampling pipe (9), wherein the connecting flange A (1) is connected to the connecting flange B (3) via a flexible short-circuit (2), the flexible short-circuit (2) is located outside the sampling pipe (9), the sampling pipe (9) is connected to an exhaust gas storage bag (14) via a vacuum pump (13), and a sampling box (8) is connected to the sampling pipe (9).

2. The high-efficiency anti-medium diffusion sampling device according to claim 1 is characterized in that: The flexible short circuit (2) is located below the connecting flange B (3), and a gland flange A (41) and a gland flange B (42) are provided above the connecting flange B (3).

3. The high-efficiency anti-medium diffusion sampling device according to claim 2 is characterized in that: The gland flange A (41) is provided with bolt holes (6), a sealing gasket A (5) is provided between the gland flange A (41) and the gland flange B (42), a sealing gasket B (7) is provided between the connecting flange B (3) and the gland flange A (41), and the gland flange B (42) and the gland flange A (41) have the same structure.

4. The high-efficiency medium diffusion-proof sampling device according to claim 3 is characterized in that: The sampling pipe (9) is provided with a sampling head (10), and the sampling pipe (9) passes through the gland flange A (41), the gland flange B (42), the connecting flange B (3), the flexible short circuit (2), and the connecting flange A (1) in sequence from top to bottom.

5. The high-efficiency medium diffusion-proof sampling device according to claim 2 is characterized in that: A sealing ring (12) is provided at the connection between the sampling pipe (9) and the gland flange A (41), and a sampler control valve (11) is provided on the sampling pipe (9). The sampler control valve (11) is located between the sampling box (8) and the sealing ring (12).

6. The high-efficiency medium diffusion-proof sampling device according to claim 1 is characterized in that: A primary vacuum pipe (16) is connected between the sampling pipe (9) and the vacuum pump (13), and the sampling box (8) is connected to the primary vacuum pipe (16) via a secondary vacuum pipe (15).

Images