Normal-pressure closed sampling device

Abstract

The utility model discloses a normal-pressure closed sampling device which comprises a closed sampling box, a sampling bottle, a sampling collection box, a material transfer pump, a sampling valve and a replacement valve, a sampling bottle is arranged in the closed sampling box, a sampling valve is mounted on the closed sampling box right above the sampling bottle, and the sampling valve is connected with a sample storage tank; a funnel is arranged beside the sampling bottle in the closed sampling box, the funnel is arranged on the bottom surface in the closed sampling box, a replacement valve is connected below the funnel, and the replacement valve is connected with a sampling collection box below the closed sampling box; the top of the closed sampling box is connected with a vacuum system through a pipeline; the bottom of the sampling and collecting box is connected with a material transferring pump which is connected with a storage tank. According to the utility model, sampling is completed in the closed sampling box by utilizing the vacuum system, and toxic and harmful gases escaping during sampling are pumped away through the vacuum system, so that the harmful gases are conveyed to the tail gas treatment system for innocent treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical safety, and in particular relates to a normal pressure closed sampling device. Background Art

[0002] According to the requirements of Article 7.2.3 of the "Petrochemical Metal Pipeline Layout Design Code" (SH 3012-2011), extremely hazardous and highly hazardous media should be sampled in a closed loop. For some hazardous and highly hazardous media at normal pressure, closed sampling is required. For example, most of the existing normal pressure liquids such as phosphorus trichloride and hydrochloric acid use direct sampling, which does not meet the requirements of the design specifications, pollutes the environment, and harms the health of operators. Summary of the invention

[0003] The utility model aims to overcome the hazards of existing direct sampling. The utility model provides a normal pressure closed sampling device, which uses a vacuum system to complete sampling in a sampling box and draws the toxic and harmful gases emitted during sampling to the exhaust gas treatment system through vacuum.

[0004] The technical solution adopted by the utility model is: a normal pressure closed sampling device, including a closed sampling box, a sampling bottle, a sampling collection box, a material transfer pump, a sampling valve and a replacement valve; a sampling bottle is arranged in the closed sampling box, a sampling valve is installed on the closed sampling box directly above the sampling bottle, and the sampling valve is connected to a sample storage tank; a funnel is arranged beside the sampling bottle inside the closed sampling box, the funnel is arranged on the bottom surface inside the closed sampling box, a replacement valve is connected below the funnel, and the replacement valve is connected to the sampling collection box below the closed sampling box; the top of the closed sampling box is connected to a vacuum system through a pipeline; the bottom of the sampling collection box is connected to a material transfer pump, and the material transfer pump is connected to a storage tank.

[0005] Furthermore, a plexiglass sliding door is provided on the side of the closed sampling box.

[0006] The beneficial effects of the utility model are as follows: the utility model utilizes a vacuum system to complete sampling in a closed sampling box, and extracts toxic and harmful gases emitted during sampling through the vacuum system, thereby transporting the harmful gases to an exhaust gas treatment system for harmless treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the utility model;

[0008] In the figure: 1-closed sampling box, 2-sampling collection box, 3-material transfer pump, 4-sampling valve, 5-replacement valve, 6-sampling bottle, 7-funnel, 8-plexiglass sliding door. DETAILED DESCRIPTION

[0009] The utility model is further described below in conjunction with the accompanying drawings.

[0010] like Figure 1 As shown, the utility model is a closed sampling device at normal pressure, comprising a closed sampling box 1, a sampling bottle 6, a sampling collection box 2, a transfer pump 3, a sampling valve 4 and a replacement valve 5; a plexiglass sliding door 8 is provided on the side of the closed sampling box 1, which is convenient for taking and operating the sampling bottle 6 inside the plexiglass sliding door 8; a sampling valve 4 is installed on the sampling port on the closed sampling box 1 just above the sampling bottle 6, and the sampling valve 4 is connected to the sample storage tank. A funnel 7 is provided next to the sampling bottle 6 inside the closed sampling box 1, and the funnel 7 is arranged on the bottom surface inside the closed sampling box 1. A replacement valve 5 is connected below the funnel 7, and the replacement valve 5 is connected to the sampling collection box 2 below the closed sampling box 1; the top of the closed sampling box 1 is connected to a vacuum system through a pipeline, so that harmful gases in the closed sampling box 1 can be extracted and transported to the exhaust gas treatment system for harmless treatment; the bottom of the sampling collection box 2 is connected to a transfer pump 3, and the transfer pump 3 is reconnected to the storage tank.

[0011] The operation method of the utility model is as follows: when sampling, start the vacuum system, open the organic glass sliding door 8 on the left side of the sealed sampling box 1, put the sampling bottle 6 into the sealed sampling box 1 and close the sliding door; then open the sampling valve 4, and when the sample in the sampling bottle 6 reaches two-thirds, close the sampling valve 4; open the organic glass sliding door 8 on the right side of the sampling box, open the replacement valve 5, pour the sample in the sampling bottle 6 into the funnel 7 on the right side, close the sampling valve 4 after pouring, and put the sampling bottle 6 under the sampling port again; repeat the above steps twice, cover the sampling bottle 6 with the bottle stopper, and the sampling is completed. When the liquid level in the sampling collection box reaches a high level, open the replacement valve 5, start the material transfer pump 3, and stop the material transfer pump 3 after the liquid level in the sampling collection box is transferred to a low level.

[0012] It should be noted that the above is an explanation of the technical solution of the utility model rather than a limitation. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the utility model as long as they do not exceed the idea and scope of the technical solution of the utility model.

Claims

1. A normal pressure closed sampling device, characterized in that: It includes a closed sampling box, a sampling bottle, a sampling collection box, a material transfer pump, a sampling valve and a replacement valve; a sampling bottle is arranged in the closed sampling box, a sampling valve is installed on the closed sampling box directly above the sampling bottle, and the sampling valve is connected to a sample storage tank; a funnel is arranged next to the sampling bottle inside the closed sampling box, the funnel is arranged on the bottom surface inside the closed sampling box, a replacement valve is connected below the funnel, and the replacement valve is connected to the sampling collection box below the closed sampling box; the top of the closed sampling box is connected to a vacuum system through a pipeline; the bottom of the sampling collection box is connected to a material transfer pump, and the material transfer pump is connected to a storage tank.

2. The atmospheric pressure sealed sampling device according to claim 1, characterized in that: A plexiglass sliding door is provided on the side of the closed sampling box.

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