Closed sampler

Abstract

The utility model discloses a closed sampler which comprises a sampler body, the sampler body is of a box body structure, a purging system, a cooling system, a pressurization system, a gas-liquid separation system and a sampling system are respectively arranged in the sampler body, and the purging system, the cooling system and the gas-liquid separation system are respectively connected with a pipeline of the pressurization system. The gas-liquid separation system is connected with the sampling system through a pipeline, the gas-liquid separation system and the sampling system are both connected with an emptying pipeline, the booster pump, the gas-liquid separation tank and the sampling steel cylinder are all provided with linings, and main parts such as the linings, the liquid discharge valve and the liquid discharge pipeline are all made of PTFE (Polytetrafluoroethylene) materials. The closed sampler is high in corrosion resistance, long in service life, high in cost performance, convenient to operate, safe, environment-friendly, particularly suitable for sampling of strong corrosive media such as wet chlorine, capable of avoiding volatilization of chlorine and the like during sampling, capable of improving stability of the closed sampler in the using process, capable of avoiding influence on human health and environmental pollution, and suitable for popularization and application. And fresh and representative samples can be collected at any time.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical processing and detection, in particular to a closed sampler. Background Art

[0002] In recent years, with the rapid development of scientific and technological productivity, the proportion of domestically produced oil has gradually increased. In the process of petrochemical production, it is often necessary to collect media in special pipelines for testing and analysis, while preventing volatile substances in the samples from leaking into the atmosphere. In order to obtain the results of the collected samples in a timely, accurate and fast manner, the sampling process must be completed with the help of closed sampler equipment.

[0003] The existing closed samplers have unreasonable design of components and main pipeline structures, poor corrosion resistance, short service life, complex operation, low sampling stability, poor use effect, and low cost performance. There is an urgent need for a closed sampler with stable sampling function to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a closed sampler which has a simple structure, is easy to operate, has strong corrosion resistance, has a long service life, is cost-effective, safe and environmentally friendly, and can take fresh and representative samples at any time.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A closed sampler, comprising: a sampler body, the sampler body is a box structure, the interior of the sampler body is respectively provided with a purge system, a cooling system, a pressurizing system, a gas-liquid separation system and a sampling system, the purge system, the cooling system and the gas-liquid separation system are respectively connected to the pressurizing system pipeline, the gas-liquid separation system is connected to the sampling system pipeline, the gas-liquid separation system and the sampling system are both connected to a venting pipeline, wherein the pressurizing system comprises an air source valve and a booster pump, the booster pump is sealed connected to the air source inlet arranged on the sampler body through the booster pipeline, the air source valve is arranged on the booster pipeline adjacent to the air source inlet; the purge system comprises a purge pipeline and a pressure regulating valve and a purge valve arranged on the purge pipeline, the first end of the purge pipeline is connected to the booster pump, the second end of the purge pipeline is sealed connected to the purge port on the sampler body; the cooling system comprises a cooler and a drain valve connected to the cooler, the The cooler is movably connected to the cooling water inlet and cooling water outlet on the sampler body through an inlet pipe and an outlet pipe respectively. The first end of the cooler is connected to the medium inlet on the sampler body through a first medium pipe, and the second end of the cooler is connected to the booster pump through a second medium pipe. The gas-liquid separation system includes a gas-liquid separation tank and a drain valve. The gas-liquid separation tank is connected to the booster pump through a third medium pipe. The two ends of the gas-liquid separation tank are respectively connected to the drain pipe and the vent pipe. The drain valve is movably arranged on the drain pipe, and a vent valve is arranged on the vent pipe. The sampling system includes a sampling cylinder, a diaphragm pressure gauge, an angle valve, and a fast handwheel valve. The first end of the sampling cylinder is connected to the gas-liquid separation tank through a fourth medium pipe, and the second end of the sampling cylinder is connected to the vent pipe. The angle valve and the fast handwheel valve are respectively arranged on the fourth medium pipe and the vent pipe, and the diaphragm pressure gauge is connected to the gas-liquid separation tank.

[0007] In the above structure, a tantalum membrane is provided inside the diaphragm pressure gauge, and the booster pump, the gas-liquid separation tank, and the sampling cylinder are all provided with an inner liner made of PTFE material.

[0008] In the above structure, the purge valve includes a first purge valve and a second purge valve. The first purge valve is arranged adjacent to the pressure regulating valve. The first purge valve is a one-way valve to prevent the medium from flowing back.

[0009] In the above structure, the cooler includes an outer shell and a cooling coil arranged inside the outer shell. The cooling coil is made of titanium material, and the outer shell is made of stainless steel.

[0010] In the above structure, the angle valve includes a first angle valve and a second angle valve, and the first angle valve and the second angle valve are respectively arranged on the fourth medium pipeline and the vent pipeline.

[0011] In the above structure, the fast handwheel includes an inlet fast handwheel valve and an outlet fast handwheel valve, and the inlet fast handwheel valve and the outlet fast handwheel valve are respectively arranged on the fourth medium pipeline and the vent pipeline adjacent to the first angle valve and the second angle valve.

[0012] In the above structure, the drainage pipeline is arranged at the lower end of the gas-liquid separation tank, and the drainage valve and the drainage pipeline are both made of PTFE material.

[0013] In the above structure, the vent valve includes the first vent valve and the second vent valve, the first vent valve is a one-way valve, and the second vent valve is arranged adjacent to the vent port of the sampler body.

[0014] The above structure also includes a bypass valve, which is arranged on the venting pipeline.

[0015] The beneficial effects of the utility model are:

[0016] The main body and main parts of the closed sampler of the utility model are made of PTFE and materials, which have strong anti-corrosion performance and long service life. It is especially suitable for sampling highly corrosive media such as wet chlorine. It has reasonable design and simple operation, which can avoid the volatilization of hydrogen sulfide, chlorine, etc. during on-site sampling, improve the safety of gas during the use of the closed sampler, reduce the risk of gas causing damage to the health of sampling personnel, and improve the stability of gas during the use of the closed sampler. Avoid affecting human health and causing environmental pollution. The utility model has high cost performance, convenient operation, safety and environmental protection, and can take fresh and representative samples at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an embodiment of a closed sampler of the utility model.

[0018] In the figure, 1-sampler body, 2-gas source valve, 3-boosting pump, 4-pressure regulating valve, 5-purge valve, 51-first purge valve, 52-second purge valve, 6-cooler, 7-drain valve, 8-gas-liquid separation tank, 9-drain valve, 10-vent valve, 101-first vent valve, 102-second vent valve, 11-sampling cylinder, 12-diaphragm pressure gauge, 13-angle valve, 131-first angle valve, 132-second angle valve, 14-fast handwheel valve, 141-first fast handwheel valve, 142-second fast handwheel valve, 15-bypass valve, 16-inlet valve, N1-purge port, N2-medium inlet, N3-cooling water outlet, N4-cooling water inlet, N5-gas source inlet, N6-vent port. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1 As shown, a closed sampler comprises: a sampler body 1, the sampler body 1 is a box structure, the interior of the sampler body 1 is respectively provided with a purging system, a cooling system, a pressurizing system, a gas-liquid separation system and a sampling system, the purging system, the cooling system and the gas-liquid separation system are respectively connected to the pressurizing system pipeline, the gas-liquid separation system is connected to the sampling system pipeline, and the gas-liquid separation system and the sampling system are both connected to the venting pipeline, wherein the pressurizing system comprises an air source valve 2 and a boosting pump 3, the boosting pump 2 is sealedly connected to the air source inlet N5 arranged on the sampler body 1 through the boosting pipeline, and the air source valve 2 is arranged on the boosting pipeline adjacent to the air source inlet N5; the purging system comprises a purging pipeline and a pressure regulating valve 4 and a purging valve 5 arranged on the purging pipeline, the first end of the purging pipeline is connected to the boosting pump 3, and the second end of the purging pipeline is sealedly connected to the purging port N1 on the sampler body 1; the cooling system comprises a cooler 6 and a drain valve 7 connected to the cooler 6, and the cooler 7 is respectively connected to the water inlet pipe The first end of the cooler 6 is connected to the medium inlet N2 on the sampler body 1 through the first medium pipeline, and the second end of the cooler 6 is connected to the booster pump 3 through the second medium pipeline; the gas-liquid separation system includes a gas-liquid separation tank 8 and a drain valve 9. The gas-liquid separation tank 8 is connected to the booster pump 3 through the third medium pipeline. The two ends of the gas-liquid separation tank are respectively connected to the drain pipeline and the vent pipeline. The drain valve 9 is movably arranged on the drain pipeline, and the vent pipeline is provided with a vent valve 10; the sampling system includes a sampling cylinder 11, a diaphragm pressure gauge 12, an angle valve 13, and a fast handwheel valve 14. The first end of the sampling cylinder 11 is connected to the gas-liquid separation tank 8 through the fourth medium pipeline, and the second end of the sampling cylinder 11 is connected to the vent pipeline. The angle valve 13 and the fast handwheel valve 14 are respectively arranged on the fourth medium pipeline and the vent pipeline, and the diaphragm pressure gauge 12 is connected to the gas-liquid separation tank 8.

[0021] Specifically, in this embodiment, the sampling system mainly collects representative samples into a sampling cylinder lined with PTFE material through a quick handwheel connection assembly.

[0022] In a preferred embodiment of the utility model, a tantalum membrane is provided inside the diaphragm pressure gauge 12, and the booster pump 3, the gas-liquid separation tank 8, and the sampling cylinder 11 are all provided with inner liners, and the inner liners are all made of PTFE material.

[0023] Specifically, in this embodiment, the liner includes a PTFE isolation layer arranged on the inner side of the booster pump 3 , the gas-liquid separation tank 8 , and the sampling cylinder 11 .

[0024] Specifically, in this embodiment, PTFE, commonly known as the "king of plastics", has excellent chemical stability, corrosion resistance, sealing, high lubricity and non-stickiness, electrical insulation and good anti-aging endurance, high temperature resistance, and working temperature of 250°C, low temperature resistance, good mechanical toughness at low temperature, and can maintain 5% elongation even if the temperature drops to -196°C, corrosion resistance, inertness to most chemicals and solvents, strong acid and alkali, water and various organic solvents, and can react with molten alkali metals. It is not corroded by any substance, and even if it is boiled in hydrofluoric acid, aqua regia or oleum, sodium hydroxide, it will not change. It has good weather resistance, the best aging life in plastics, high lubricity, the lowest friction coefficient among solid materials, no adhesion, the smallest surface tension among solid materials, no adhesion to any substance, non-toxic, safe and environmentally friendly.

[0025] In a preferred embodiment of the present invention, the purge valve 5 includes a first purge valve 51 and a second purge valve 52. The first purge valve 51 is disposed adjacent to the pressure regulating valve 4. The first purge valve 51 is a one-way valve for preventing backflow of the medium.

[0026] Specifically, in this embodiment, before sampling, ensure that the cooling water is connected, first open the valve on the main line at the front end of the sample inlet, allow the sample to enter the cooler 6 for a period of time, ensure that the pressure regulating valve 4 is opened after the temperature drops, and in order to ensure the normal use of the cooler 6.

[0027] In a preferred embodiment of the present invention, the cooler 6 includes a shell and a cooling coil disposed inside the shell. The cooling coil is made of titanium, and the shell is made of stainless steel.

[0028] Specifically, in this embodiment, the materials of the cooling plate and the cooling tube are both titanium, and the specific structure and working principle of the cooler 6 are all existing technologies and will not be elaborated here.

[0029] In a preferred embodiment of the present invention, the angle valve 13 includes a first angle valve 131 and a second angle valve 132. The first angle valve 131 and the second angle valve 132 are respectively arranged on the fourth medium pipeline and the vent pipeline.

[0030] Specifically, in this embodiment, the first angle valve 131 is an inlet angle valve, and the second angle valve 131 is an outlet angle valve.

[0031] In a preferred embodiment of the utility model, the fast handwheel valve 14 includes an inlet fast handwheel valve 141 and an outlet fast handwheel valve 142. The inlet fast handwheel valve 141 and the outlet fast handwheel valve 142 are respectively arranged on the fourth medium pipeline and the vent pipeline adjacent to the first angle valve 131 and the second angle valve 132.

[0032] Specifically, in this embodiment, the inlet fast handwheel valve 141 is arranged adjacent to the first angle valve 131 .

[0033] In a preferred embodiment of the utility model, the drain pipeline is arranged at the lower end of the gas-liquid separation tank 8, and the drain valve 9 and the drain pipeline are both made of PTFE. The drain valve 10 includes a first drain valve 101 and a second drain valve 102, the first drain valve 101 is a one-way valve to prevent the medium from flowing back, and the second drain valve 102 is arranged adjacent to the drain port N6 of the sampler body 1.

[0034] Specifically, in this embodiment, the first vent valve 101 is a one-way valve, and the second vent valve 102 is arranged at intervals.

[0035] In a preferred embodiment of the utility model, a bypass valve 15 is also included. The bypass valve 15 is arranged on the venting pipeline.

[0036] The working principle of this utility model:

[0037] For high-temperature samples, the utility model ensures that cooling water is connected before sampling. The cut-off valve on the front pipeline of the sample inlet is opened first to allow the sample to enter the cooler for a period of time. The inlet valve 16 is opened after the sample is cooled down. In order to ensure the service life of the cooler 6, the drain valve 7 should be opened to drain the cooling water in the cooler 6 when the sampler is not in use.

[0038] For low-pressure samples, before sampling, it is necessary to connect nitrogen or compressed air to the gas source port, first open the gas source valve 2, adjust the nitrogen to a suitable pressure, start the booster pump 3, and then open the inlet valve 16;

[0039] For gas samples with a relatively high liquid content, it is necessary to regularly open the drain valve 9 at the lower end of the gas-liquid separation tank 8 to ensure that the liquid accumulated in the gas-liquid separation tank 8 can be discharged without affecting re-sampling.

[0040] When sampling, it is necessary to ensure that the sampling cylinder 11 is firmly connected to the sampling pipeline through the inlet handwheel 141 and the outlet fast handwheel 142 without leakage. First open the inlet valve 15, the inlet angle valve 131, the outlet angle valve 132, and the vent valve 10 to allow the sample to be replaced in the sampling cylinder 11 for 1-2 minutes to ensure that the sample is representative.

[0041] Then close the vent valve 10, and after the indication on the diaphragm pressure gauge 12 stabilizes, close the outlet angle valve 132, the inlet angle valve 131 and the inlet valve 16, and start the booster pump 3. The sampler also needs to close the gas source valve 2 at this time.

[0042] After sampling, the pipeline needs to be purged. First open the vent valve 10 and bypass valve 15, then open the pressure regulating valve 4, adjust the pressure of the purge gas to the appropriate pressure, open the purge valve 5, and purge the entire system for about 1 minute. Close the purge valve 5 and the pressure regulating valve 4, wait until the indicator needle on the diaphragm pressure gauge 12 returns to zero, and then close the bypass valve 15 and the vent valve 10. Finally, open the inlet valve handwheel 141 and the outlet fast handwheel 142, remove the sampling cylinder 11, and complete the overall sampling process.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A closed sampler, comprising: The sampler body is a box structure, characterized in that a purge system, a cooling system, a pressurizing system, a gas-liquid separation system and a sampling system are respectively arranged inside the sampler body, the purge system, the cooling system and the gas-liquid separation system are respectively connected to the pressurizing system pipeline, the gas-liquid separation system is connected to the sampling system pipeline, and the gas-liquid separation system and the sampling system are both connected to the venting pipeline, wherein the pressurizing system comprises an air source valve and a booster pump, the booster pump is sealed connected to the air source inlet arranged on the sampler body through the booster pipeline, and the air source valve is arranged on the booster pipeline adjacent to the air source inlet; the purge system comprises a purge pipeline and a pressure regulating valve and a purge valve arranged on the purge pipeline, the first end of the purge pipeline is connected to the booster pump, and the second end of the purge pipeline is sealed connected to the purge port on the sampler body; the cooling system comprises a cooler and a drain valve connected to the cooler, the cooling The cooler is movably connected to the cooling water inlet and cooling water outlet on the sampler body through an inlet pipe and an outlet pipe, respectively. The first end of the cooler is connected to the medium inlet on the sampler body through a first medium pipe, and the second end of the cooler is connected to the booster pump through a second medium pipe; the gas-liquid separation system includes a gas-liquid separation tank and a drain valve. The gas-liquid separation tank is connected to the booster pump through a third medium pipe, and the two ends of the gas-liquid separation tank are respectively connected to the drain pipe and the vent pipe, the drain valve is movably arranged on the drain pipe, and the vent pipe is provided with a vent valve; the sampling system includes a sampling cylinder, a diaphragm pressure gauge, an angle valve, and a fast handwheel valve. The first end of the sampling cylinder is connected to the gas-liquid separation tank through a fourth medium pipe, and the second end of the sampling cylinder is connected to the vent pipe. The angle valve and the fast handwheel valve are respectively arranged on the fourth medium pipe and the vent pipe, and the diaphragm pressure gauge is connected to the gas-liquid separation tank.

2. A closed sampler according to claim 1, characterized in that: A tantalum membrane is provided inside the diaphragm pressure gauge, and the booster pump, the gas-liquid separation tank, and the sampling cylinder are all provided with an inner lining made of PTFE material.

3. A closed sampler according to claim 1, characterized in that: The purge valve comprises a first purge valve and a second purge valve. The first purge valve is arranged adjacent to the pressure regulating valve. The first purge valve is a one-way valve to prevent the medium from flowing back.

4. A closed sampler according to claim 1, characterized in that: The cooler comprises an outer shell and a cooling coil arranged inside the outer shell. The cooling coil is made of titanium material, and the outer shell is made of stainless steel.

5. A closed sampler according to claim 1, characterized in that: The angle valve comprises a first angle valve and a second angle valve, and the first angle valve and the second angle valve are respectively arranged on the fourth medium pipeline and the vent pipeline.

6. A closed sampler according to claim 5, characterized in that: The fast handwheel comprises an inlet fast handwheel valve and an outlet fast handwheel valve, and the inlet fast handwheel valve and the outlet fast handwheel valve are respectively arranged on the fourth medium pipeline and the vent pipeline adjacent to the first angle valve and the second angle valve.

7. A closed sampler according to claim 2, characterized in that: The drain pipeline is arranged at the lower end of the gas-liquid separation tank, and the drain valve and the drain pipeline are both made of PTFE material.

8. A closed sampler according to claim 1, characterized in that: The vent valve includes a first vent valve and a second vent valve, wherein the first vent valve is a one-way valve to prevent the medium from flowing back, and the second vent valve is arranged adjacent to the vent port of the sampler body.

9. A closed sampler according to claim 1, characterized in that: It also includes a bypass valve, which is arranged on the venting pipeline.

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