Closed liquid sampler for chemical device

Abstract

The utility model discloses a closed liquid sampler for a chemical device, which comprises a sample introduction pipeline flange, a sample introduction pipeline, a three-way valve, a sample discharge pipeline, a sample discharge pipeline flange, an emptying pipeline, an adsorption device and a sampling bottle, an outlet of the sample inlet pipeline is connected with the sample outlet pipeline through an inlet and a first outlet of the three-way valve, an outlet of the sample outlet pipeline is connected with the sample outlet pipeline flange, a second outlet of the three-way valve is provided with the sampling pipeline, an outlet of the sampling pipeline and an inlet of the emptying pipeline are both connected with the sampling bottle, and an outlet of the emptying pipeline is connected with the adsorption device. During replacement, the sample introduction pipeline is connected with the sample discharge pipeline, during sampling, the sample introduction pipeline is connected with the sampling pipeline, and after sampling is finished, the sample introduction pipeline, the sample discharge pipeline and the sampling pipeline are not connected. And safety and reliability are improved.

Description

Technical Field

[0001] The utility model relates to sample sampling, in particular to a liquid closed sampler for chemical engineering devices. Background Technique

[0002] In chemical production, many samples are toxic, flammable and volatile, posing great potential safety and health hazards to operators and environmental pollution. The products in the production process of cyclohexanol are mainly mixtures of benzene, cyclohexane, cyclohexene and cyclohexanol. The intermediate product samples are highly volatile. Currently, in the same industry, open sampling or closed steel cylinder sampling is mostly used. For open sampling, toxic and harmful gases are likely to volatilize. Closed steel cylinder sampling is costly, and the steel cylinder replacement is not thorough and cannot be cleaned. CN202013290U adopts a closed sampler, but its waste liquid leads to a waste tank, and there is a problem that the waste liquid is difficult to handle; waste liquid is constantly generated during operation, the amount of waste liquid is large, the valve core 16 is prone to poor sealing, and maintenance is difficult; how the sampling bottle 1) is connected to the sampling interface 18 at the lower end is not clearly described. According to Figure 1 It may pierce the soft plug for sampling. After the soft plug is pierced multiple times, it needs to be replaced, resulting in relatively high costs. CN209327063U adopts a closed sampler, but it has no sample replacement design, and the sampling is not representative; after the soft plug of its sampling bottle is pierced multiple times, it needs to be replaced, resulting in relatively high costs.

[0003] Therefore, it is necessary to design a closed sampler with sufficient sample replacement, no waste liquid generation, simple structure, no consumables, and long service life of accessories. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a liquid closed sampler for chemical engineering devices, enabling the replacement sample to flow back to the downstream of the pipeline. The replacement sample will no longer be restricted by time and can infinitely replace the pipeline. Since the replacement sample flows back to the downstream of the pipeline, no waste liquid is generated, there is no need for a waste liquid tank to collect waste liquid, nor is there a need to handle waste liquid.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A liquid closed sampler for chemical engineering devices includes an inlet pipeline flange, an inlet pipeline, a three-way valve, an outlet pipeline, an outlet pipeline flange, a vent pipeline, an adsorption device and a sampling bottle. The inlet of the inlet pipeline is connected to the inlet pipeline flange, the outlet of the inlet pipeline is connected to the outlet pipeline through the inlet and the first outlet of the three-way valve, the outlet of the outlet pipeline is connected to the outlet pipeline flange, the second outlet of the three-way valve is provided with a sampling pipeline, the outlet of the sampling pipeline and the inlet of the vent pipeline are both connected to the sampling bottle, and the outlet of the vent pipeline is connected to the adsorption device.

[0007] Further, the sampling bottle includes a sample bottle cap and a sample bottle body connected by a thread. A through hole is provided in the middle of the sample bottle cap, and a hollow external threaded tube is inserted through the through hole. Upper and lower sealing gaskets are provided on the outer end face and the inner end face of the sample bottle cap corresponding to the through hole. An upper fastening nut is provided on the upper end face of the upper sealing gasket, and a lower fastening nut is provided on the lower end face of the lower sealing gasket. The hollow external threaded tube is fixed to the sample bottle cap through the upper and lower fastening nuts. A tube cap covers the part of the hollow external threaded tube above the upper fastening nut, and a silica gel cap is provided at the lower end of the hollow external threaded tube.

[0008] Further, a sampling valve and an emergency sampling port are provided on the sampling pipeline, and an outlet valve is provided on the sampling outlet pipeline.

[0009] Further, a thermometer and a pressure gauge are also provided on the sampling pipeline.

[0010] Further, scale lines are provided on the sample bottle body, and the tube cap is threadedly connected to the hollow external threaded tube.

[0011] Further, during sampling, the tube cap is unscrewed, and the sampling pipeline and the evacuation pipeline pass through the hollow external threaded tube and the silica gel cap so that the outlet of the sampling pipeline and the inlet of the evacuation pipeline are located inside the sample bottle body below the silica gel cap.

[0012] For the three-way needle valve, the sampling pipeline and the sampling outlet pipeline are always connected, and the liquid is always flowing. When the valve is opened, the liquid flows out from the sample pipeline. When the core component valve core is not tightly sealed, liquid leakage will occur. When using a trunnion ball valve three-way valve, during replacement, the sampling pipeline and the sampling outlet pipeline are connected. During sampling, the sampling pipeline and the sampling pipeline are connected. After sampling, the sampling pipeline, the sampling outlet pipeline, and the sampling pipeline are not connected. It is safer and more reliable.

[0013] Regarding the consumable problem, it is designed to use common parts such as nuts and hollow bolts, without special customization. During sampling, instead of puncturing, threaded connection is used, and there are no consumables.

[0014] Compared with the prior art, the present utility model provides a liquid closed sampler for chemical engineering devices, which has the following beneficial effects:

[0015] 1. Investment estimate: Materials such as the box body, valves, pressure gauges, thermometers, pipelines, and flanges cost about 4000 yuan;

[0016] 2. Cost savings: Compared with the liquid pipeline on-line closed sampler costing 20,000 yuan, 16,000 yuan is saved. Compared with the steel cylinder closed sampler costing 6000 yuan, 2000 yuan of steel cylinder cost is saved.

[0017] 3. Effects achieved after implementation: After implementation, closed sampling is carried out, which is harmless to the health of personnel and the environment. It is durable, with one-time investment and no subsequent costs. All accessories are common parts. Even if they are damaged, they can be replaced by oneself.

[0018] 4. Significance of implementation: It can be widely applied to the sampling of toxic, harmful and volatile liquids in cyclohexanol plants. There is no waste liquid generated during the whole process, and at the same time, the harm to the environment and physical health caused by volatile gases during the sampling process is avoided. Moreover, the sample replacement is sufficient, ensuring the cleanliness of the sampled sample. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram of the sampling bottle; Figure 2 In, (a) is the front view of the sampling bottle; (b) is the sectional view of the sampling bottle; (c) is the exploded view of part A in (b); (d) is the top view of the sampling bottle;

[0021] Figure 1 In: 1. Inlet pipeline flange; 2. Inlet pipeline; 3. Inlet valve; 4. Emergency sampling port; 5. Thermometer; 6. Pressure gauge; 7. Three-way valve; 8. Sampling bottle; 9. Drainage pipeline; 10. Adsorption device; 11. Outlet pipeline; 12. Outlet valve; 13. Outlet pipeline flange;

[0022] Figure 2 In: 81. Pipe cap; 82. Fastening nut; 83. Sealing gasket; 84. Hollow external threaded pipe; 85. Silicone cap; 86. Sample bottle cap; 87. Sample bottle body. Specific Embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment 1

[0025] A liquid closed sampler for chemical plants, as Figure 1 and Figure 2 shown, includes an inlet pipeline flange 1, an inlet pipeline 2, a three-way valve 7, an outlet pipeline 11, an outlet pipeline flange 13, a drainage pipeline 9, an adsorption device 10 and a sampling bottle 8. The inlet of the inlet pipeline 2 is connected to the inlet pipeline flange 1, and the outlet of the inlet pipeline 2 is connected to the outlet pipeline 11 through the inlet and the first outlet of the three-way valve 7. The outlet of the outlet pipeline 11 is connected to the outlet pipeline flange 13. The second outlet of the three-way valve 7 is provided with a sampling pipeline, and the outlet of the sampling pipeline and the inlet of the drainage pipeline 9 are both connected to the sampling bottle 8. The outlet of the drainage pipeline 9 is connected to the adsorption device 10.

[0026] In this embodiment, the sampling bottle 8 includes a sample bottle cap 86 and a sample bottle body 87 that are threadedly connected. A through hole is provided in the middle of the sample bottle cap 86, and a hollow external threaded tube 84 (specifically a hollow external threaded stainless steel tube) is inserted through the through hole. Upper and lower sealing gaskets 831 and 832 are provided on the outer and inner end faces of the sample bottle cap 86 corresponding to the through hole. An upper fastening nut 821 is provided on the upper end face of the upper sealing gasket 831, and a lower fastening nut 822 is provided on the lower end face of the lower sealing gasket 832. The hollow external threaded tube 84 is fixed to the sample bottle cap 86 by the upper fastening nut 821 and the lower fastening nut 822. A pipe cap 81 is provided on the part of the hollow external threaded tube 84 above the upper fastening nut 821, and the pipe cap 81 is threadedly connected to the hollow external threaded tube 84. A silica gel cap 85 is provided at the lower end of the hollow external threaded tube 84. Scale lines are provided on the sample bottle body 87.

[0027] In this embodiment, a sampling valve 3, an emergency sampling port 4, a thermometer 5, and a pressure gauge 6 are provided on the sampling pipeline 2, and an outlet valve 12 is provided on the sample outlet pipeline 11.

[0028] During sampling, the sampling pipeline and the evacuation pipeline 9 pass through the hollow external threaded tube 84 and the silica gel cap 85 so that the outlet of the sampling pipeline and the inlet of the evacuation pipeline 9 are located inside the sample bottle body 87 below the silica gel cap 85.

[0029] When not sampling, the three-way valve 7 is turned off. Before sampling, the three-way valve 7 is toggled to connect the sampling pipeline 2 and the sample outlet pipeline 11 for sample replacement. The sampling valve 3 and the outlet valve 11 are opened for sample replacement, and the thermometer 5 and the pressure gauge 6 are observed to check whether the sample temperature and pressure are normal. After the original material in the sampling pipeline 2 is replaced, during sampling, the three-way valve 7 is toggled to connect the sampling pipeline 2 and the sampling pipeline. During sampling, the pipe cap 81 of the sampling bottle is unscrewed, the hollow external threaded tube 84 is fixed to the sample bottle cap 86, and the sampling pipeline and the evacuation pipeline 9 are passed through the hollow external threaded tube 84 and the silica gel cap 85 so that the outlet of the sampling pipeline and the inlet of the evacuation pipeline 9 are located inside the sample bottle body 87 below the silica gel cap 85. The sample is taken to an appropriate liquid level. The three-way valve 7 is toggled to disconnect the sampling pipeline 2, the sample outlet pipeline 10, and the sampling bottle 8. The sampling valve 3 and the outlet valve 11 are closed. The hollow external threaded tube 84 of the sampling bottle is unscrewed and the pipe cap 81 is screwed on. Sampling is completed.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid closed sampler for a chemical device, characterized in that It includes an injection pipeline flange, an injection pipeline, a three-way valve, a sampling pipeline, a sampling pipeline flange, a drain pipeline, an adsorption device and a sampling bottle. The inlet of the injection pipeline is connected to the injection pipeline flange. The outlet of the injection pipeline is connected to the sampling pipeline through the inlet and the first outlet of the three-way valve. The outlet of the sampling pipeline is connected to the sampling pipeline flange. The second outlet of the three-way valve is provided with a sampling pipeline. The outlet of the sampling pipeline and the inlet of the drain pipeline are both connected to the sampling bottle. The outlet of the drain pipeline is connected to the adsorption device.

2. The liquid closed sampler for chemical devices according to claim 1, wherein The sampling bottle includes a sample bottle cap and a sample bottle body connected by threads. A through hole is provided in the middle of the sample bottle cap. A hollow external threaded tube is inserted through the through hole. Upper and lower sealing gaskets are provided on the outer end face and the inner end face of the sample bottle cap corresponding to the through hole. An upper fastening nut is provided on the upper end face of the upper sealing gasket, and a lower fastening nut is provided on the lower end face of the lower sealing gasket. The hollow external threaded tube is fixed to the sample bottle cap by the upper and lower fastening nuts. A pipe cap is provided on the part of the hollow external threaded tube above the upper fastening nut, and a silica gel cap is provided at the lower end of the hollow external threaded tube.

3. The liquid closed sampler for chemical plants according to claim 1, wherein An injection valve and an emergency sampling port are provided on the injection pipeline, and an outlet valve is provided on the sampling pipeline.

4. The liquid closed sampler for chemical devices according to claim 1, characterized in that, A thermometer and a pressure gauge are also provided on the injection pipeline.

5. The liquid hermetic sampler for chemical plants according to claim 2, characterized in that, Scale lines are provided on the sample bottle body, and the pipe cap is threadedly connected to the hollow external threaded tube.

6. The liquid closed sampler for chemical plants according to claim 2, characterized in that, During sampling, the pipe cap is unscrewed, and the sampling pipeline and the drain pipeline pass through the hollow external threaded tube and the silica gel cap so that the outlet of the sampling pipeline and the inlet of the drain pipeline are located inside the sample bottle body below the silica gel cap.

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