CN-224231347-U - Closed sampling device

Abstract

The utility model discloses a closed sampling device which comprises a material temporary storage tank, wherein the material temporary storage tank is respectively connected with a feeding pipeline, a discharging pipeline, a nitrogen pipeline, a flushing pipeline and a vacuum pipeline, the feeding pipeline is connected with a reaction kettle, the tail end of the discharging pipeline is connected with a sampling bottle, the nitrogen pipeline is connected with a nitrogen source, the flushing pipeline is connected with a flushing liquid storage tank, the vacuum pipeline is connected with a vacuumizing device, and a cleaning pipeline is further connected between the feeding pipeline and the discharging pipeline. The utility model realizes closed sampling, avoids manhole opening operation, avoids harm to occupational health of sampling personnel, also avoids sample leakage, and has higher sampling safety and environmental protection. The sampling device has the advantages of simple and convenient sampling process, high sampling accuracy, wide application range and can be used for sampling operation of homogeneous phase liquid, heterogeneous phase liquid and solid-containing liquid.

Inventors

• LI ZHIQING
• LI HAIHUA
• GAO JIFENG
• ZHANG XIZHE
• LI HONGLI
• XU KUN

Assignees

• 山东润博生物科技有限公司

Dates

Publication Date

20260512

Application Date

20250514

Claims (10)

1. 1. The airtight sampling device is characterized by comprising a material temporary storage tank, wherein the material temporary storage tank is respectively connected with a feeding pipeline, a discharging pipeline, a nitrogen pipeline, a flushing pipeline and a vacuum pipeline, the feeding pipeline is connected with a reaction kettle, the tail end of the discharging pipeline is connected with a sampling bottle, the nitrogen pipeline is connected with a nitrogen source, the flushing pipeline is connected with a flushing liquid storage tank, the vacuum pipeline is connected with a vacuumizing device, and a cleaning pipeline is further connected between the feeding pipeline and the discharging pipeline.
2. 2. The sealed sampling device according to claim 1, wherein valves are provided on the feed line, the discharge line, the nitrogen line, the purge line, the vacuum line and the purge line, respectively.
3. 3. The sealed sampling device according to claim 2, wherein the interface between the purge line and the discharge line is located between the discharge line valve and the material temporary storage tank, and the interface between the purge line and the feed line is located between the feed line valve and the material temporary storage tank.
4. 4. The sealed sampling device according to claim 2, wherein the valve is a ball valve, a stop valve, a pneumatic valve or a needle valve.
5. 5. The sealed sampling device of claim 1, wherein the feed line is connected to the bottom or lower portion of the temporary storage tank, the discharge line is connected to the bottom of the temporary storage tank, and the flushing line, the vacuum line and the nitrogen line are respectively connected to the upper portion or the top portion of the temporary storage tank.
6. 6. The sealed sampling device according to claim 1, wherein a lower cannula is arranged in the reaction kettle, and one end of the feeding pipeline is connected with the lower cannula.
7. 7. The sealed sampling device according to claim 1, wherein the material temporary storage tank is provided with a sight glass.
8. 8. The sealed sampling device of claim 7, wherein the sight glass is symmetrically arranged on the material temporary storage tank, and the sight glass is positioned in the middle of the side wall of the material temporary storage tank.
9. 9. The sealed sampling device according to claim 1, 7 or 8, wherein a pressure gauge is arranged on the material temporary storage tank.
10. 10. The sealed sampling device according to claim 1, wherein the discharging pipeline is provided with a sight glass.

Description

Closed sampling device Technical Field The utility model belongs to the technical field of chemical sampling equipment, and particularly relates to a closed sampling device. Background In the chemical industry, many reactions involve toxic, hazardous, flammable, explosive chemicals. If leakage occurs during sampling, serious safety accidents such as fire, explosion, poisoning and the like can be caused. According to statistics, a considerable part of chemical accidents are caused by leakage of chemicals, so that the closed operation of the reaction kettle sampling process is an important measure for guaranteeing the safety of chemical production. Conventional sampling methods typically use simple tools such as sampling bottles or sampling tubes to sample by manually opening the sampling port of the reaction vessel. The method has a plurality of problems that if toxic volatile substances are contained in the kettle, the toxic volatile substances bring harm to the occupational health of operators, a simple sampling tool easily falls off and falls into the reaction kettle, a certain potential safety hazard is brought to production, and meanwhile, open sampling does not meet the requirements of environmental protection policies. CN221945652U discloses a liquid-phase hazardous chemical substance airtight sampling device, including airtight sampling bottle and airtight liquid receiving barrel, airtight sampling bottle first end is provided with first opening, first opening can dismantle the first end of intercommunication upstream pipeline, the first end of upstream pipeline still is provided with first control valve, the second end intercommunication liquid storage pot entry pipeline of upstream pipeline, airtight sampling bottle second end is provided with the second opening, can dismantle the first end of intercommunication downstream pipeline, the first end of downstream pipeline still is provided with the second control valve, airtight liquid receiving barrel top is through gas phase valve and liquid storage pot top breather valve pipeline intercommunication, airtight liquid receiving barrel bottom is through the second end and the incomplete appearance transfer pump tee bend of liquid phase valve and downstream pipeline, incomplete appearance transfer pump import is provided with the import valve. The device realizes closed sampling, and can effectively collect samples of various toxic, harmful, inflammable, explosive and other harmful medium and low pressure liquid media. CN221484874U discloses a sealed sampling device for waste gas condensate, which comprises a condensate tank and a delivery pump, wherein a liquid outlet pipe and a liquid inlet pipe are arranged on the condensate tank, the liquid outlet pipe is connected with an inlet of the delivery pump, the sealed sampling device further comprises a sampling bottle, the sampling bottle is provided with a bottle inlet valve and a bottle outlet valve, the bottle inlet valve is connected with the delivery pump outlet through a sampling inlet pipe, the bottle outlet valve is connected with the delivery pump inlet through a circulating outlet pipe, the sealed sampling device further comprises a spanning pipe which is arranged in parallel with the sampling bottle, two ends of the spanning pipe are respectively connected with a liquid inlet end of the bottle inlet valve and a liquid outlet end of the bottle outlet valve, one end of the spanning pipe, which is connected with the bottle outlet valve, is connected with a purging pipe through the sampling inlet pipe, and one end of the spanning pipe, which is connected with the bottle outlet valve, is sequentially connected with a vent on the upper part of the condensate tank through the circulating outlet pipe and the venting pipe. The device has realized airtight sample, and the sample is even, and sampling error is little. The prior art well realizes closed sampling, but has the defects of small material applicability range, high requirement on material state, difficult cleaning and maintenance and the like. Disclosure of utility model Aiming at the problems of sampling in the current industrial production process, the utility model provides a closed sampling device which realizes closed sampling, has simple, convenient and safe sampling process and accurate sampling, is suitable for sampling operation of homogeneous phase liquid, heterogeneous phase liquid and solid-containing liquid, and has wide application range. The specific technical scheme of the utility model is as follows: The device comprises a material temporary storage tank, wherein the material temporary storage tank is respectively connected with a feeding pipeline, a discharging pipeline, a nitrogen pipeline, a flushing pipeline and a vacuum pipeline, the feeding pipeline is connected with a reaction kettle, the tail end of the discharging pipeline is connected with a sampling bottle, the nitrogen pipeline is connected with a nitrogen source, th