Closed sampler for chemicals easy to crystallize

Abstract

The utility model belongs to the technical field of airtight sampling of vinylene carbonate, and particularly discloses an airtight sampler for chemicals easy to crystallize, which comprises an airtight sampling valve arranged on a material pipeline, and a sampling control switch is arranged on the airtight sampling valve; a tail gas adsorption tank is arranged at the top end of the closed sampling valve, and a sampling bottle is arranged at the bottom end; a waste gas exhaust needle communicated with the sampling bottle is arranged in the tail gas adsorption tank; and a discharging needle communicated with the sampling bottle is arranged at the bottom end of the closed sampling valve. The sampling control switch is arranged on the closed sampling valve, so that a material sample can flow into the sample bottle along the discharging needle in a sealed environment, the material sample is prevented from being in contact with air and an external environment, and the influence of the air and a high-humidity environment on the quality of the sample is avoided; volatile organic compounds generated by the material in the sampling process are discharged into the tail gas adsorption tank along the waste gas exhaust needle to be adsorbed, so that the volatile organic compounds generated by the material sample are prevented from polluting the environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of closed sampling of vinylene carbonate, and in particular relates to a closed sampler for easily crystallized chemicals. Background Art

[0002] In the chemical field of lithium battery electrolyte additives, many materials have the characteristic of crystallizing at room temperature, and lithium battery electrolytes have strict requirements on the water content of raw and auxiliary materials (within 20ppm). At the same time, contact with oxygen will cause deterioration of the product and affect product quality.

[0003] The existing sampling method of production enterprises is usually to adopt an open sampling method on the material pipeline. During the sampling process, the product may have the following problems: the sample is easy to contact with the air, easy to absorb water in a high humidity environment, easy to crystallize and block the sampling port at a low temperature, the volatile organic compounds generated by the sample are easy to pollute the environment, and easy to cause adverse effects on the health of employees. The above sampling method is easy to affect the test results of the sample, mislead the normal production process operation, cause pipeline crystallization blockage, bring unnecessary troubles to normal production, and also cause environmental pollution and increase production costs.

[0004] The Chinese patent with the authorization announcement number CN201740661U discloses a closed sampler, including a liquid storage elbow and a bypass elbow connected to each other, wherein the two pipe openings of the liquid storage elbow and the two pipe openings of the corresponding bypass elbow are respectively connected through the two pipe openings of a three-way pipe fitting, and the three-way pipe fitting is provided with a two-way reversing valve or a three-way reversing valve; the liquid storage elbow is provided with a sampling interface; the utility model is safe, environmentally friendly, and energy-saving, with a simple and beautiful appearance and high working efficiency, and integrates the sampling interface for field sampling and laboratory use to achieve the effects of safety, environmental protection, energy saving, convenience, and high efficiency, and is easy to operate and maintain, and has the characteristics of long service life, etc. At the same time, the utility model can be widely used in the sampling requirements of various toxic and harmful liquids and gases and the requirements of high pressure, high and low temperature, which is a sampling method that is difficult to achieve with other samplers. In the actual sampling process of the closed sampler, the sampling interface is easily affected by the external temperature, resulting in the sample crystallization blocking the sampling interface, which brings unnecessary troubles to normal production. Utility Model Content

[0005] In order to solve the above problems, this patent provides a closed sampler for easily crystallized chemicals.

[0006] Based on the above purpose, the utility model is achieved through the following technical solutions:

[0007] A closed sampler for easily crystallized chemicals comprises a closed sampling valve arranged on a material pipeline, wherein a sampling control switch is arranged on the closed sampling valve; a tail gas adsorption tank is arranged at the top of the closed sampling valve, and a sampling bottle is arranged at the bottom; a waste gas exhaust needle connected to the sampling bottle is arranged in the tail gas adsorption tank, the waste gas exhaust needle extends into the sampling bottle through the closed sampling valve, and the waste gas exhaust needle extends into the top of the sampling bottle; a discharge needle connected to the sampling bottle is arranged at the bottom of the closed sampling valve, the discharge needle and the waste gas exhaust needle are clearance-matched, and the discharge needle extends into the bottom of the sampling bottle.

[0008] Preferably, a purge structure is provided on the closed sampling valve, and the purge structure includes a purge pipeline arranged on the closed sampling valve, a one-way valve and a purge valve with a gap matching the one-way valve are provided on the purge pipeline, and the one-way valve is arranged on the purge pipeline close to one side of the closed sampling valve.

[0009] Preferably, a heating structure cooperating with the closed sampling valve is provided on the material pipeline, and the heating structure comprises a heating pipeline arranged on the material pipeline and cooperating with the closed sampling valve.

[0010] Preferably, the heating pipeline is sheathed on the material pipeline.

[0011] Preferably, an ambient temperature sensor is provided on the material pipeline.

[0012] Preferably, replaceable activated carbon is provided in the tail gas adsorption tank.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model provides a sampling control switch on the closed sampling valve, so that the material sample can flow into the sample bottle along the discharge needle in a sealed environment, thereby preventing the material sample from contacting the air and the external environment, and preventing the air and high humidity environment from affecting the sample quality. The volatile organic compounds generated by the material during the sampling process are discharged along the exhaust gas exhaust needle into the exhaust gas adsorption tank for adsorption, thereby preventing the volatile organic compounds generated by the material sample from polluting the environment, and significantly improving the working environment of the workers; the purge structure of the utility model can further prevent the external environment from affecting the material sample, preventing the air from contacting the material sample, and preventing the volatile organic compounds in the sampling bottle from polluting the environment by purging the air remaining in the closed sampling valve and the sampling bottle; the utility model heats the material through the heating structure, so that the material is always above the melting point, preventing the material sample from crystallizing and solidifying at the closed sampling valve, and preventing the material pipeline and the closed sampling valve from being blocked by crystallization due to low temperature (lower than the melting point of the material). BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model in Example 1;

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure of part A in the middle.

[0017] In the figure, 1. material pipeline; 2. material pipeline inlet; 3. heating pipeline inlet; 4. heating pipeline; 5. purge valve; 6. one-way valve; 7. purge pipeline; 8. tail gas adsorption tank; 9. sampling control switch; 10. heating pipeline outlet; 11. material pipeline outlet; 12. sampling bottle; 13. closed sampling valve; 14. exhaust gas exhaust needle; 15. discharge needle. DETAILED DESCRIPTION

[0018] The present invention is further described below through specific embodiments, but the scope of the present invention is not limited thereto.

[0019] Example 1

[0020] A closed sampler for easily crystallized chemicals, the structure of which is as follows Figure 1-2 As shown, it includes a closed sampling valve 13 arranged on the material pipeline 1, and a sampling control switch 9 is arranged on the closed sampling valve 13; a tail gas adsorption tank 8 is arranged at the top of the closed sampling valve 13, and a sampling bottle 12 is arranged at the bottom; a waste gas exhaust needle 14 connected to the sampling bottle 12 is arranged in the tail gas adsorption tank 8; and a discharge needle 15 connected to the sampling bottle 12 is arranged at the bottom of the closed sampling valve 13. Replaceable activated carbon is arranged in the tail gas adsorption tank 8.

[0021] The airtight sampling valve 13 is a sampling valve with an airtight effect. The sampling valve is a valve used to obtain medium samples in pipelines or equipment, and is used in situations where chemical analysis of medium samples is required frequently.

[0022] The closed sampling valve 13 is provided with a purge structure, which includes a purge pipeline 7 arranged on the closed sampling valve 13, a check valve 6 and a purge valve 5 which is gap-matched with the check valve 6 are arranged on the purge pipeline 7, and the check valve 6 is arranged on the purge pipeline 7 close to the closed sampling valve 13. The material pipeline 1 is provided with a heating structure which matches the closed sampling valve 13, and the heating structure includes a heating pipeline 4 which is arranged on the material pipeline 1 and matches the closed sampling valve 13. The heating pipeline 4 is sleeved on the material pipeline 1. The material pipeline 1 is provided with an ambient temperature sensor.

[0023] The use process of the utility model is as follows:

[0024] S1. The utility model is composed of a purge structure, a heating structure, an exhaust gas adsorption tank 8, a sampling bottle 12, a closed sampling valve 13, a sampling control switch 9 and matching valves and pipelines. The material in the material pipeline 1 moves along the material pipeline inlet 2 to the material pipeline outlet 11.

[0025] S2. Select appropriate purge medium and heating medium based on the melting point, thermal sensitivity, reaction with oxygen and other characteristics of the samples taken by the enterprise.

[0026] S3. According to the change of ambient temperature, when the ambient temperature is close to the melting point of the material, the heating structure is put into use and ensured to work normally. The heating medium of the heating structure flows into the heating pipeline 4 along the heating pipeline inlet 3, and the material pipeline 1 in the same flow direction is heated to make the material at the closed sampling valve 13 always in liquid state. The heated heating medium flows out along the heating pipeline outlet 10 and is recovered, reheated and recycled.

[0027] S4. Before formal sampling, first open the purge valve 5 and use the purge medium to replace the gas in the closed sampling valve 13 along the purge pipeline 7 and the one-way valve 6, and discharge the remaining air in the closed sampling valve 13 along the discharge needle 15 into the sampling bottle 12 to prevent the air in the closed sampling valve 13 and the sampling bottle 12 from contaminating the material sample. After 1 minute, close the purge valve 5 and the gas replacement is completed.

[0028] S5. When formally sampling, the sampling control switch 9 is turned on, and the material is discharged into the sampling bottle 12 through the discharge needle 15 (an appropriate amount of sample is taken according to the amount for laboratory analysis), and the sampling control switch 9 is turned off.

[0029] S6. Open the purge valve 5 again to purge the residual material in the sampling valve discharge pipeline into the sampling bottle 12. The exhaust gas enters the exhaust gas adsorption tank 8 through the exhaust gas exhaust needle 14 and is absorbed by the adsorbent in the exhaust gas adsorption tank 8. Then close the purge valve 5. At this point, a sampling operation is completed.

[0030] The utility model is used for sampling of fine chemical products whose melting point is close to or higher than room temperature (20°C), whose quality index is higher and which cannot be in contact with oxygen.

[0031] All pipeline connections in the utility model are welded, and the closed sampling valve 13 and the connected one-way valve 6 and purge valve 5 in the utility model are flange-connected.

[0032] Example 2

[0033] A closed sampler for easily crystallized chemicals, which is different from Example 1 in that a heating pipeline 4 is spirally sleeved on a material pipeline 1.

[0034] Example 3

[0035] A closed sampler for easily crystallized chemicals, which is different from Example 1 in that: a connecting thread matching with a closed sampling valve 13 is provided at the top of a sampling bottle 12; a connecting sleeve matching with the connecting thread is provided at the bottom of the closed sampling valve 13, and a detachable connecting plug is provided on the connecting sleeve.

[0036] The above description is only a preferred embodiment of the present invention, but is not limited to the above examples. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A closed sampler for easily crystallized chemicals, characterized in that: It comprises a closed sampling valve arranged on a material pipeline, on which a sampling control switch is arranged; a tail gas adsorption tank is arranged at the top of the closed sampling valve, and a sampling bottle is arranged at the bottom; a waste gas exhaust needle connected to the sampling bottle is arranged in the tail gas adsorption tank; and a discharge needle connected to the sampling bottle is arranged at the bottom of the closed sampling valve.

2. The closed sampler for easily crystallized chemicals according to claim 1, characterized in that: The closed sampling valve is provided with a purge structure, which includes a purge pipeline arranged on the closed sampling valve, a one-way valve and a purge valve with a gap matching the one-way valve on the purge pipeline, and the one-way valve is arranged on the purge pipeline close to one side of the closed sampling valve.

3. The closed sampler for easily crystallized chemicals according to claim 1, characterized in that: The material pipeline is provided with a heating structure matched with the closed sampling valve, and the heating structure comprises a heating pipeline arranged on the material pipeline and matched with the closed sampling valve.

4. The closed sampler for easily crystallized chemicals according to claim 3, characterized in that: The heating pipeline is sleeved on the material pipeline.

5. The closed sampler for easily crystallized chemicals according to claim 1, characterized in that: The material pipeline is provided with an ambient temperature sensor.

6. The closed sampler for easily crystallized chemicals according to claim 1, characterized in that: The tail gas adsorption tank is provided with replaceable activated carbon.

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