High-condensation-point material pipeline sampler

Abstract

The utility model belongs to the technical field of pipeline sampling devices, and particularly relates to a high-condensation-point material pipeline sampling device which comprises a pipeline valve body, a sample cup, a valve clack, a valve rod, a hand wheel and a quantitative cup, the sample cup is connected to the outer side of the pipeline valve body, a lower valve rod is arranged in the sample cup, one end of the lower valve rod is connected with a lower valve clack, and the other end of the lower valve rod is connected with a lower hand wheel. The inner wall of the pipeline valve body is connected with a quantitative cup, the quantitative cup comprises an upper inlet and a lower outlet, the lower valve clack can abut against or be separated from the lower outlet by rotating the lower hand wheel, and the upper valve clack can abut against or be separated from the upper inlet by rotating the upper hand wheel. The sampler disclosed by the utility model is directly connected with a p-nitroaniline high-condensation-point material pipeline, so that the effectiveness of a sample is ensured; the quantitative cup is always positioned in the pipeline valve body in the sampling process, so that the problem of untight sealing caused by solidification of materials at a sampling port due to temperature and pressure reduction of the materials is solved; the specification of the quantitative cup can be set according to sample demand.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline samplers, and in particular relates to a pipeline sampler for high freezing point materials. Background Technology

[0002] p-Nitroaniline, appearing as yellow needle-like crystals, is characterized by high toxicity, easy sublimation, and a high freezing point. It is an important intermediate in the dye industry and pharmaceutical chemicals, and can also be used to synthesize p-phenylenediamine, among other things. Nitroaniline is produced by reacting nitrochlorobenzene and concentrated ammonia in a high-temperature, high-pressure system.

[0003] To ensure the safe and stable operation of the equipment and to keep abreast of the composition and properties of materials in the reaction system, sampling valves are installed on the equipment or connected pipelines to take samples from the pipeline for analysis.

[0004] Existing samplers have significant shortcomings:

[0005] I. The existing pipelines of the nitroaniline reaction system are all high-temperature and high-pressure fluids, especially containing a large amount of ammonia. The sampling process is dangerous. Existing sampling valves are generally used in conventional working conditions such as high temperature and low pressure, and high pressure and low temperature. For high temperature, high pressure and high freezing point material systems, the existing samplers cannot meet the process requirements. Once a large amount of material is leaked, it may cause harm to human health and the environment.

[0006] Second, during the sampling process, high-temperature and high-pressure materials will flash after flowing into the low-pressure system, causing the material temperature to drop. The material will solidify at the sampling valve, which will then cause the sampling valve to not seal properly and pose a risk of leakage.

[0007] Third, after sampling, the system needs to be depressurized when removing the sample bottle. Nitroaniline, which is easily sublimated, will block the exhaust pipe, affecting the continuous operation of the device. Moreover, the process of cleaning the exhaust pipe is quite dangerous.

[0008] Therefore, there is an urgent need for a convenient, safe, and reliable sampler suitable for pipelines handling high-temperature, high-pressure, and high-freezing-point materials such as p-nitroaniline. Utility Model Content

[0009] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high freezing point material pipeline sampler.

[0010] To achieve the above objectives, the technical solution adopted is:

[0011] A pipeline sampler for high pour point materials includes a pipeline valve body, a sample cup, a valve disc, a valve stem, a handwheel, and a metering cup. The valve stem includes an upper valve stem and a lower valve stem. The valve disc includes an upper valve disc and a lower valve disc. The handwheel includes an upper handwheel and a lower handwheel. The pipeline valve body has an inlet and an outlet at both ends. Both the pipeline valve body and the sample cup are hollow structures. The sample cup is connected to the outside of the pipeline valve body. A lower valve stem is located inside the sample cup. One end of the lower valve stem is connected to the lower valve disc, and the other end is located outside the sample cup. The lower handwheel is connected to the pipeline valve body, which has a through hole for the lower valve stem to pass through. A metering cup is connected to the inner wall of the pipeline valve body. The metering cup is located above the sample cup. The metering cup includes an upper inlet and a lower outlet. Rotating the lower handwheel can cause the lower valve disc to abut or separate from the lower outlet. An upper valve stem is located above the metering cup. One end of the upper valve stem near the metering cup is connected to the upper valve disc. The other end of the upper valve stem is located outside the pipeline valve body and is connected to the upper handwheel. Rotating the upper handwheel can cause the upper valve disc to abut or separate from the upper inlet.

[0012] Based on the above technical solution, the present invention can be further improved as follows:

[0013] Furthermore, the sample cup is perpendicular to the flow direction of the liquid medium inside the pipeline valve body.

[0014] Furthermore, the pipeline valve body is connected to a material pipeline, and the pipeline valve body is welded or flanged to the material pipeline.

[0015] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: welding can improve the sealing effect between the pipeline valve body and the material pipeline interface of p-nitroaniline, and flange connection can cut off the upstream and downstream materials in the event of a failure, and directly replace the spare sampler, with minimal impact on production.

[0016] Furthermore, the sample cup is provided with a refrigerant inlet and a refrigerant outlet. The refrigerant inlet is connected to the refrigerant and is located near the lower end of the sample cup wall, while the refrigerant outlet is located near the upper end of the sample cup wall.

[0017] The beneficial effects of adopting the above-mentioned further technical solutions are that the introduction of a refrigerant, such as cooling water, can effectively reduce the temperature inside the sample cup, ensure the safety of the sampling process, and prevent burns.

[0018] Furthermore, the sample cup is equipped with a steam purging inlet.

[0019] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: steam purging can clean the inner wall of the metering cup, prevent material residue, ensure the purity of each sample, avoid cross-contamination, and improve the accuracy of sampling.

[0020] Furthermore, the pipe valve body and the sample cup are detachably connected, preferably with a flange connection, and the sample cup and the pipe valve body are connected by threads.

[0021] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: the detachable design makes it easier to clean and replace the sample cup, reduces maintenance costs, and increases the service life of the equipment. Moreover, the sample cup needs to be removed after sampling in order to test the sample.

[0022] Furthermore, the sample cup is made of stainless steel lined with polytetrafluoroethylene (PFA).

[0023] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: the sample cup is made of a combination of stainless steel and PFA, which has excellent corrosion resistance and high temperature resistance, can adapt to high temperature and high pressure working environments, and extend the service life of the equipment.

[0024] Furthermore, the upper valve stem is threaded to the pipeline valve body, and a packing seal is fitted on the upper valve stem.

[0025] The beneficial effects of adopting the above-mentioned further technical solutions are that: the packing seal can effectively prevent material leakage, ensure the safety and accuracy of the sampling process, and reduce environmental pollution.

[0026] Furthermore, a clamping nut is connected to the lower end of the sample cup, and the lower valve rod extends into the sample cup through the clamping nut.

[0027] The beneficial effects of adopting the above-mentioned further technical solutions are that tightening the nut can enhance the stability of the lower valve stem, ensure sealing during operation, and prevent leakage.

[0028] Furthermore, the metering cup is fixedly connected to the pipeline valve body, preferably by welding.

[0029] The beneficial effects of adopting the above-mentioned further technical solutions are that: the fixed connection can improve the stability of the metering cup, ensure the accuracy of the sampling process, and reduce errors caused by vibration or movement.

[0030] Furthermore, the upper and lower valve discs are conical, with one end connected to the corresponding valve stem having a wide opening and the protruding end having a conical opening.

[0031] Furthermore, the upper inlet and lower outlet are circular through holes, and annular seals are provided in both the upper inlet and lower outlet. A circular gap is formed in the annular seals. The upper valve disc and lower valve disc fill or leave the circular gap, thereby realizing the contact or separation of the upper valve disc and lower valve disc with the metering cup. The circular gap is preferably an approximately Φ20mm hole, and the sealing structure is preferably a sealing ring.

[0032] Furthermore, the sample cup is connected to a pressure gauge.

[0033] The beneficial effects of adopting the above-mentioned further technical solutions are that the pressure gauge can monitor the pressure changes inside the sample cup in real time, ensuring the safety of the sampling process and timely detection of potential safety hazards.

[0034] Furthermore, the outer wall of the pipeline valve body is connected to a jacketed heat tracing inlet and a jacketed heat tracing outlet.

[0035] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: the jacketed heat tracing design can effectively maintain the temperature of the material inside the pipeline, prevent the material from solidifying inside the pipeline, and ensure the accuracy and reliability of sampling.

[0036] Furthermore, the inlet and outlet of the pipeline valve body are located at both ends of the pipeline valve body and are respectively connected to the material pipeline.

[0037] Furthermore, the upper handwheel is a hydraulic rebound handwheel.

[0038] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: The main function of the hydraulic return handwheel is to allow operators to manually adjust certain parameters of the hydraulic system, such as pressure, flow rate, or position. It is usually connected to a hydraulic cylinder, valve, or other hydraulic components. The handwheel's characteristic of automatically returning to its initial position after operation reduces operating force and time, thereby improving work efficiency. Furthermore, it has advantages such as simple structure, convenient maintenance, and long service life. It can provide greater operating force, reduce the labor intensity of operators, and ensure the rapid opening and closing of valves, improving operational safety and convenience.

[0039] Furthermore, the outer wall of the pipeline valve body is provided with a groove, the sample cup is located in the groove and connected to the bottom of the groove, and the inner wall of the pipeline valve body inside the groove is connected to the metering cup.

[0040] Furthermore, the sample cup is a cup-shaped structure with an open top, and the lower valve stem is threadedly connected to the sample cup.

[0041] Compared with the prior art, the advantages of this utility model are as follows: the sampler of this utility model is directly connected to the pipeline of high-freezing-point p-nitroaniline materials, ensuring the validity of the sample; the quantitative cup is always in the pipeline valve body during the sampling process, and there is no problem of material solidification at the sampling port due to material cooling and pressure reduction, resulting in poor sealing; the quantitative cup specification can be set according to the required sample volume. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a pipeline sampler for high freezing point materials according to this utility model;

[0043] Figure 2This is a top view of a high freezing point material pipeline sampler according to the present invention;

[0044] The attached diagram is labeled as follows: 1. Pipeline valve body inlet; 2. Pipeline valve body outlet; 3. Jacketed heat tracing inlet; 4. Jacketed heat tracing outlet; 5. Upper handwheel; 6. Upper valve stem; 7. Metering cup; 8. Refrigerant outlet; 9. Steam purging inlet; 10. Sample cup; 11. Refrigerant inlet; 12. Lower valve stem; 13. Lower handwheel; 14. Lower valve disc; 15. Upper valve disc; 16. Pipeline valve body. Detailed Implementation

[0045] The present invention will be described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0046] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] refer to Figures 1-2A high-freezing-point material pipeline sampler includes a pipeline valve body 16, a sample cup 10, a valve disc, a valve stem, a handwheel, and a metering cup 7. The valve stem includes an upper valve stem 6 and a lower valve stem 12. The valve disc includes an upper valve disc 15 and a lower valve disc 14. The handwheel includes an upper handwheel 5 and a lower handwheel 13. The pipeline valve body 16 has a pipeline valve body inlet 1 and a pipeline valve body outlet 2 at both ends. Both the pipeline valve body 16 and the sample cup 10 are hollow structures. The sample cup 10 is connected to the outside of the pipeline valve body 16. The sample cup 10 has a lower valve stem 12 inside. One end of the lower valve stem 12 is connected to the lower valve disc 14, and the other end is located at the sample cup. A lower handwheel 13 is connected to the outside of the sample cup 10. The pipe valve body 16 has a through hole for the lower valve stem 12 to pass through. A metering cup 7 is connected to the inner wall of the pipe valve body 16. The metering cup 7 is located above the sample cup 10. The metering cup 7 includes an upper inlet and a lower outlet. Rotating the lower handwheel 13 can cause the lower valve disc 14 to abut or separate from the lower outlet. An upper valve stem 6 is provided above the metering cup 7. An upper valve disc 15 is connected to one end of the upper valve stem 6 near the metering cup 7. The other end of the upper valve stem 6 is located outside the pipe valve body 16 and is connected to the upper handwheel 5. Rotating the upper handwheel 5 can cause the upper valve disc 15 to abut or separate from the upper inlet.

[0049] In this embodiment, the sample cup 10 is perpendicular to the flow direction of the liquid medium in the pipe valve body 16.

[0050] In this embodiment, the sample cup 10 is a cup-shaped structure with an open top, and the lower valve stem 12 is threadedly connected to the sample cup 10.

[0051] In an optional embodiment, the pipe valve body 16 is connected to a material pipeline, and the pipe valve body 16 and the material pipeline are connected by welding or flange.

[0052] In an optional embodiment, the sample cup 10 is provided with a refrigerant inlet 11 and a refrigerant outlet 8. The sample cup 10 is provided with a jacket. The refrigerant enters and exits the jacket of the sample cup 10 through the refrigerant inlet 11 and the refrigerant outlet 8 to cool the material inside the sample cup 10. The refrigerant inlet 11 is connected to the refrigerant and is located near the lower end of the cup wall of the sample cup 10. The refrigerant outlet 8 is located near the upper end of the cup wall of the sample cup 10.

[0053] In an optional embodiment, the sample cup 10 is provided with a steam purging inlet 9.

[0054] In a preferred embodiment, the pipe valve body 16 and the sample cup 10 are detachably connected, preferably by a flange connection, and the sample cup 10 and the pipe valve body 16 are connected by threads.

[0055] In this embodiment, the sample cup 10 is made of stainless steel lined with polytetrafluoroethylene.

[0056] In an optional embodiment, the upper valve stem 6 is threadedly connected to the pipeline valve body 16, and a packing seal is fitted on the upper valve stem 6.

[0057] In this embodiment, a clamping nut is connected to the lower end of the sample cup 10. The clamping nut is located between the sample cup 10 and the lower handwheel 13. The clamping nut is threadedly connected to the lower valve stem 12. A packing seal is provided between the sample cup 10 and the clamping nut. The lower valve stem 12 passes through the clamping nut and extends into the sample cup 10.

[0058] In a preferred embodiment, the metering cup 7 is fixedly connected to the pipeline valve body 16, preferably by welding.

[0059] In some embodiments, the upper valve disc 15 and the lower valve disc 14 are conical, with one end connected to the corresponding valve stem having a wide opening and the protruding end having a conical opening.

[0060] In this embodiment, the upper inlet and lower outlet are circular through holes, and annular seals are provided in both the upper inlet and lower outlet. A circular gap is formed in the annular seals. The upper valve disc 15 and the lower valve disc 14 fill or leave the circular gap, thereby realizing the contact or separation of the upper valve disc 15 and the lower valve disc 14 with the metering cup 7. The circular gap is preferably an approximately Φ20mm hole. In this embodiment, the sealing structure is a sealing ring.

[0061] In this embodiment, the sample cup 10 is connected to a pressure gauge.

[0062] In an optional embodiment, the outer wall of the pipeline valve body 16 is connected to a jacketed heat tracing inlet 3 and a jacketed heat tracing outlet 4.

[0063] In this embodiment, the jacketed heat tracing inlet 3 and the jacketed heat tracing outlet 4 are located at both ends of the pipeline valve body 16, close to the pipeline valve body inlet 1 and the pipeline valve body outlet 2 respectively, and located on both sides of the sample cup 10, valve disc, valve stem, handwheel and metering cup 7.

[0064] In this embodiment, the inlet 1 and outlet 2 of the pipeline valve body are located at both ends of the pipeline valve body 16 and are respectively connected to the material pipeline.

[0065] In an optional embodiment, the upper handwheel 5 is a hydraulically rebound handwheel.

[0066] In this embodiment, the outer wall of the pipe valve body 16 is provided with a groove, the sample cup 10 is located in the groove and connected to the bottom of the groove, and the inner wall of the pipe valve body 16 inside the groove is connected to the metering cup 7.

[0067] Before sampling, the upper valve disc 15 is in contact with the inlet of the metering cup 7. After connecting the sample cup 10, the clamping nut, the lower handwheel 13, and the lower valve stem 12, install them on the pipeline valve body 16. Then rotate the lower handwheel 13 so that the lower valve disc 14 is in contact with the lower outlet of the metering cup 7 and is connected to the refrigerant and steam pipelines through the refrigerant inlet 11, refrigerant outlet 8, and steam purging inlet 9 of the sample cup 10.

[0068] During sampling, rotate the upper handwheel 5 to open it, causing the upper valve disc 15 to change from a contacting state to a separating state with the inlet of the metering cup 7. The material in the pipe valve body 16 flows into the metering cup 7 by gravity. Then, rotate the upper handwheel 5 to close it, causing the upper valve disc 15 to change from a separating state to a contacting state with the inlet of the metering cup 7. Then, rotate the lower handwheel 13 to lower the lower valve stem 12 and the lower valve disc 14 away from the metering cup 7, causing the lower valve disc 14 to change from a contacting state to a separating state with the outlet of the metering cup 7. The material flows into the sample cup 10 from the lower outlet of the metering cup 7. After sampling is completed, rotate the lower handwheel 13 to close it. The lower handwheel 13 rises, causing the lower valve disc 14 to change from a separating state to a contacting state with the outlet of the metering cup 7. Open the refrigerant hand valve to cool the material in the sample cup 10 and introduce steam. The steam purges the material in the metering cup 7 through the steam purging inlet 9 and the lower outlet. After the pressure in the sample cup 10 drops to 5 kPaG, turn off the refrigerant and steam, and remove the sample cup 10 to analyze the sample content.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high point material pipeline sampler characterized by, The pipeline valve body, the sample cup, the valve flap, the valve rod, the hand wheel, the quantitative cup, the valve rod includes the upper valve rod and the lower valve rod, the valve flap includes the upper valve flap and the lower valve flap, the hand wheel includes the upper hand wheel and the lower hand wheel, the pipeline valve body is equipped with the pipeline valve body import and the pipeline valve body export in both ends, the pipeline valve body and the sample cup are hollow structure, the sample cup is connected to the outside of the pipeline valve body, the sample cup is equipped with the lower valve rod, one end of the lower valve rod is connected with the lower valve flap, the other end is located outside the sample cup and is connected with the lower hand wheel, the pipeline valve body is equipped with the through hole for the lower valve rod to pass through, the inner wall of the pipeline valve body is connected with the quantitative cup, the quantitative cup is located above the sample cup, the quantitative cup includes the upper import and the lower export, rotating the lower hand wheel can make the lower valve flap abut or separate from the lower export, the upper valve rod is equipped above the quantitative cup, one end of the upper valve rod close to the quantitative cup is connected with the upper valve flap, the other end of the upper valve rod is located outside the pipeline valve body and is connected with the upper hand wheel, rotating the upper hand wheel can make the upper valve flap abut or separate from the upper import.

2. The high point material pipeline sampler of claim 1, wherein, The sample cup is perpendicular to the flow direction of the liquid medium in the pipeline valve body.

3. The high point material line sampler of claim 1, wherein, The pipeline valve body is connected with the material pipeline.

4. The high point material line sampler of claim 3, wherein, The sample cup is equipped with the refrigerant import and the refrigerant export.

5. The high point material pipeline sampler of claim 1, wherein, The sample cup is equipped with the steam purge import.

6. The high point material pipeline sampler of claim 1, wherein, The pipeline valve body and the sample cup are detachably connected.

7. The high point material pipeline sampler of claim 1, wherein, One end of the sample cup close to the lower hand wheel is equipped with the compression nut, the lower valve rod passes through the compression nut and extends into the sample cup.

8. The high point material pipeline sampler of claim 1, wherein, The sample cup is connected with the pressure gauge.

9. The high point material pipeline sampler of any of claims 1-8, wherein, The outer wall of the pipeline valve body is connected with the jacket heat import and the jacket heat export.

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