Petrochemical pipeline closed-loop sampling device

Abstract

The utility model relates to the technical field of sampling devices, in particular to a petrochemical pipeline closed-loop sampling device which comprises a side branch pipe, the side branch pipe is fixedly mounted on the side wall of a petrochemical pipeline, a bin dividing piece is fixedly mounted in the side branch pipe, an emptying piece is slidably mounted in the side branch pipe, and an emptying rod is rotatably mounted on the emptying piece; the emptying rod is in threaded connection with the end, away from the petrochemical pipeline, of the branch pipe, the branch pipe is connected with a communicating pipe, the first end of the communicating pipe is connected to the side wall of the end, close to the petrochemical pipeline, of the branch pipe, and the second end of the communicating pipe is connected to the end face of the end, away from the petrochemical pipeline, of the branch pipe. A lofting valve is fixedly mounted at one end, far away from the petrochemical pipeline, of the branch pipe and is in threaded connection with a sample bottle. By arranging the emptying piece and the emptying rod, when a sample in the petrochemical pipeline enters the sample bottle, high pressure in the petrochemical pipeline is isolated, and safe material taking is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of sampling devices, and in particular to a closed-circuit sampling device for petrochemical pipelines. Background Art

[0002] Petrochemical pipelines refer to pipelines used for transporting petrochemical raw materials such as petroleum or natural gas. High-pressure transportation is usually adopted inside petrochemical pipelines, and there is a relatively large pressure inside the pipelines. In order to monitor the situation of the transported objects inside the pipelines, it is necessary to sample the objects inside the pipelines. Due to the relatively large pressure inside the pipelines, sampling is relatively dangerous. Summary of the Invention

[0003] Aiming at the deficiencies existing in the prior art, the purpose of the present application is to provide a closed-circuit sampling device for petrochemical pipelines that is convenient for sampling.

[0004] The above application purpose of the present application is achieved through the following technical solutions:

[0005] A closed-circuit sampling device for petrochemical pipelines, comprising:

[0006] A side branch pipe, which is fixedly installed on the side wall of the petrochemical pipeline and is communicated with the petrochemical pipeline;

[0007] A partition plate, which is fixedly installed inside the side branch pipe;

[0008] An evacuation plate, which is slidably installed inside the side branch pipe, and the evacuation plate is located on the side of the partition plate away from the petrochemical pipeline;

[0009] An evacuation rod, which is rotatably installed on the evacuation plate, and the evacuation rod is threadedly connected to one end of the side branch pipe away from the petrochemical pipeline;

[0010] A connecting pipe, the first end of which is connected to the side wall of the side branch pipe near the petrochemical pipeline, and the second end is connected to the end face of the side branch pipe away from the petrochemical pipeline. A control valve is arranged in the middle of the connecting pipe;

[0011] A sampling valve, which is fixedly installed at one end of the side branch pipe away from the petrochemical pipeline;

[0012] A sample bottle, which is threadedly connected to the sampling valve;

[0013] An exhaust pipe, the inlet of which is arranged at the top of the sample bottle, and an exhaust valve is installed at one end of the exhaust pipe passing through the sample bottle;

[0014] Wherein, ventilation holes are provided on the side wall of the side branch pipe at a position on the side of the partition plate close to the evacuation plate.

[0015] Optionally, the exhaust valve is in the shape of a syringe, and the volume of the syringe is larger than that of the sample bottle.

[0016] Optionally, the emptying rod includes a polished rod section and a threaded section. A sealing piece is installed in the side branch pipe, and the polished rod section is slidably connected to the sealing piece.

[0017] Optionally, a limiting piece is fixedly installed at the junction of the polished rod section and the threaded section.

[0018] Optionally, a limiting ring is installed on the side of the vent hole of the side branch pipe away from the partition piece.

[0019] Optionally, a pressure gauge is installed at a section of the side branch pipe away from the petrochemical pipeline.

[0020] Optionally, a conduit is provided at the sample bottle inlet, and the conduit outlet is located at the bottom of the sample bottle.

[0021] Optionally, both the control valve and the sample placing valve are solenoid valves, and the control circuits of the control valve and the sample placing valve are interlocked.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] By providing the emptying piece and the emptying rod, the high-pressure transported substance in the petrochemical pipeline first enters the side branch pipe, and then the connection with the petrochemical pipeline is closed and placed into the sample bottle. When entering the sample bottle, the high pressure in the petrochemical pipeline is isolated, facilitating safe material collection.

[0024] By providing the exhaust valve in the shape of a syringe, the gas discharged from the exhaust pipe is not communicated with the outside, reducing the risk caused by the discharged sample gas or the impact on human health.

[0025] By providing the polished rod section and the sealing piece, the polished rod section and the sealing piece are slidably sealed, reducing the sealing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of the structure of the sample bottle part of an embodiment of the present application.

[0028] Reference numerals: 1, side branch pipe; 101, sample injection chamber; 102, exhaust chamber; 103, sample chamber; 11, partition piece; 12, limiting ring;

[0029] 21, emptying piece; 22, emptying rod; 221, polished rod section; 222, threaded section; 223, sealing piece; 224, limiting piece;

[0030] 3, connecting pipe; 31, control valve;

[0031] 4, sample placing valve;

[0032] 5. Sample bottle; 51. Exhaust pipe; 52. Exhaust valve; 53. Conduit. Detailed implementation manners

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] Please refer to Figure 1 and Figure 2 , which is a closed-circuit sampling device for petrochemical pipelines disclosed in an embodiment of the present application. It includes a side branch pipe 1 fixedly installed on the side wall of the petrochemical pipeline and communicating with the petrochemical pipeline. A partition plate 11 is fixedly installed in the side branch pipe 1. An air vent is provided on the side wall of the side branch pipe 1 at a position where the partition plate 11 is close to the emptying plate 21. A slidable emptying plate 21 is installed in the side branch pipe 1. The emptying plate 21 is located on the side away from the petrochemical pipeline of the partition plate 11. An emptying rod 22 is rotatably installed on the emptying plate 21. The emptying rod 22 is threadedly connected to one end of the side branch pipe 1 away from the petrochemical pipeline. The side branch pipe 1 is connected with a connecting pipe 3. The first end of the connecting pipe 3 is connected to the side wall of the side branch pipe 1 close to the petrochemical pipeline, and the second end is connected to the end face of the side branch pipe 1 away from the petrochemical pipeline. A control valve 31 is arranged in the middle of the connecting pipe 3. A sampling valve 4 is fixedly installed at one end of the side branch pipe 1 away from the petrochemical pipeline. The sampling valve 4 is threadedly connected to a sample bottle 5. An exhaust pipe 51 is installed on the top of the sample bottle 5. An exhaust valve 52 is installed at one end of the exhaust pipe 51 passing through the sample bottle 5.

[0035] Specifically, the side branch pipe 1 is installed on the side wall of the petrochemical pipeline, and the two parts of the side branch pipe 1 are connected through the connecting pipe 3. The emptying plate 21 is installed in the side branch pipe 1. The initial position of the emptying plate 21 is on the side away from the partition plate 11. When sampling is required, the control valve 31 is opened, and the emptying rod 22 is rotated to make the emptying plate 21 close to the partition plate 11. The substances in the petrochemical pipeline enter the side branch pipe 1. After rotating to a suitable position, the control valve 31 is closed, and the sample bottle 5 is installed. The sampling valve 4 is opened, and the emptying rod 22 is rotated in the reverse direction to make the sample enter the sample bottle 5.

[0036] In this way, by providing the emptying plate 21 and the emptying rod 22, the high-pressure transported substances in the petrochemical pipeline first enter the side branch pipe 1, and then the connection with the petrochemical pipeline is closed, and it is put into the sample bottle 5. When entering the sample bottle 5, the high pressure in the petrochemical pipeline is isolated, which is convenient for safe material taking.

[0037] At the same time, when the sample is a gas, after the control valve 31 is closed, the volume of the sample position can be increased by continuously rotating the emptying rod 22, thereby reducing the pressure.

[0038] In some feasible ways, the side branch pipe 1 is circular tubular. The partition sheet 11 and the evacuation sheet 21 divide the side branch pipe 1 into a sample injection chamber 101, an exhaust chamber 102, and a sample chamber 103. To ensure the real-time nature of the sample, the sample injection chamber 101 should be set smaller. The evacuation sheet 21 is slidably and sealingly connected to the inner wall of the side branch pipe 1. The exhaust chamber 102 is provided with a vent hole to facilitate the sliding of the evacuation sheet 21 within the side branch pipe 1. The second end of the connecting pipe 3 is connected to the end face of the side branch pipe 1 away from the petrochemical pipeline, and the sampling valve 4 is also installed on this end face to facilitate the evacuation sheet 21 to discharge the sample in the sample chamber 103 as much as possible. When the sample is a gas, the influence of the air existing in the sample chamber 103 on the sample is reduced. One end of the sampling valve 4 is provided with a thread and is threadedly connected to the sample bottle 5. The sample bottle 5 is provided with an exhaust pipe 51, and the air inlet of the exhaust pipe 51 is arranged at the top of the sample bottle 5 to facilitate the discharge of the gas in the sample bottle 5.

[0039] As a specific implementation manner of a petrochemical pipeline closed-circuit sampling device provided by the application, the exhaust valve 52 is in the shape of a syringe, and the volume of the syringe is larger than that of the sample bottle 5.

[0040] Overall, by setting The exhaust valve 52 is in the shape of a syringe, so that the gas discharged from the exhaust pipe 51 is not communicated with the outside, reducing the danger caused by the discharged sample gas or the impact on human health.

[0041] In some feasible ways, the exhaust pipe 51 is equipped with a check valve to reduce the backflow of the gas in the syringe.

[0042] provided as an application A petrochemical pipeline closed-circuit sampling device as another specific implementation manner of The evacuation rod 22 includes a smooth rod section 221 and a threaded section 222. A sealing sheet 223 is installed in the side branch pipe 1, and the smooth rod section 221 is slidably connected to the sealing sheet 223.

[0043] Combined with the specific use scenario, by setting the smooth rod section 221 and the sealing sheet 223, the smooth rod section 221 and the sealing sheet 223 are slidably sealed, reducing the sealing difficulty.

[0044] Furthermore, a limiting sheet 224 is fixedly installed at the junction of the smooth rod section 221 and the threaded section 222.

[0045] It should be understood that by setting the limiting sheet 224, it is avoided that the threaded section 222 enters the position of the sealing sheet 223 and affects the sealing.

[0046] In some feasible ways, the polished rod section 221 is rotatably connected to the threaded section 222. A disc is fixedly connected to the end face of the threaded section 222. The limiting piece 224 is a hollow ring formed by bolt-connecting two rings. The disc is rotatably installed inside the hollow ring. By setting the polished rod section 221 to be rotatably connected to the threaded section 222, the polished rod section 221 is fixedly connected to the emptying piece 21, reducing the connection structure and making it easier for the emptying piece 21 to fit the end of the communicating pipe 3 of the side branch pipe 1, facilitating the discharge of the sample.

[0047] provided as an application A petrochemical pipeline closed-circuit sampling device as a specific implementation manner of A limiting ring 12 is installed on the side of the side branch pipe 1 away from the ventilation hole and away from the baffle 11.

[0048] It should be understood that by setting the limiting ring 12, it is possible to prevent the emptying piece 21 from slipping to the ventilation hole and allowing air to enter the sample chamber 103.

[0049] provided as an application A petrochemical pipeline closed-circuit sampling device as a specific implementation manner of A pressure gauge is installed at a section of the side branch pipe 1 away from the petrochemical pipeline.

[0050] It should be understood that by setting the pressure gauge, it is convenient to observe the sample pressure and for the emptying piece 21 to reduce the pressure by expanding the volume.

[0051] provided as an application A petrochemical pipeline closed-circuit sampling device as a specific implementation manner of A conduit 53 is provided at the inlet of the sample bottle 5, and the outlet of the conduit 53 is located at the bottom of the sample bottle 5.

[0052] It should be understood that by setting the conduit 53, it is convenient for the sample to enter the bottom of the sample bottle 5, and then it is convenient to discharge the gas in the sample bottle 5.

[0053] In some feasible ways, the conduit 53 is threadedly connected to the sampling valve 4, and the sample bottle 5 is threadedly connected to the conduit 53.

[0054] provided as an application A petrochemical pipeline closed-circuit sampling device as a specific implementation manner of, the control valve 31 and the sample discharging valve 4 are both solenoid valves, and the control circuits of the control valve 31 and the sample discharging valve 4 are interlocked The solenoid valves improve the automation degree of the equipment. At the same time, the circuit interlock is set so that only one of the control valve 31 and the sample discharging valve 4 can be opened, reducing the situation when both are opened simultaneously

[0055] It should be understood that by setting Solenoid valves, improve the automation of the equipment, and at the same time set up circuit interlocks so that the control valve 31 and the sample discharging valve 4 can only be opened one at a time, reducing the situation when both are opened simultaneously the pressure inside the petrochemical pipeline enters the sample bottle 5 or the outside, there is a possibility of danger or material leakage.

[0056] The embodiments of the specific implementation manners are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A petrochemical pipeline closed-circuit sampling device, characterized in that: include: A side branch pipe (1), the side branch pipe (1) is fixedly installed on the side wall of the petrochemical pipeline and is connected to the petrochemical pipeline; A compartment plate (11), the compartment plate (11) being fixedly installed in the side branch pipe (1); an emptying plate (21), the emptying plate (21) being slidably mounted in the side branch pipe (1), the emptying plate (21) being located on a side of the compartment plate (11) away from the petrochemical pipeline; an emptying rod (22), the emptying rod (22) being rotatably mounted on the emptying plate (21), the emptying rod (22) being threadedly connected to an end of the branch pipe (1) away from the petrochemical pipeline; A connecting pipe (3), wherein a first end of the connecting pipe (3) is connected to a side wall of the side branch pipe (1) close to the petrochemical pipeline, and a second end is connected to an end surface of the side branch pipe (1) away from the petrochemical pipeline, and a control valve (31) is provided in the middle of the connecting pipe (3); A lofting valve (4), the lofting valve (4) being fixedly mounted on an end of the branch pipe (1) away from the petrochemical pipeline; A sample bottle (5), the sample bottle (5) being threadably connected to the sample placing valve (4); An exhaust pipe (51), the inlet of the exhaust pipe (51) being arranged at the top of the sample bottle (5), the exhaust pipe (51) penetrating the sample bottle (5) and having an exhaust valve (52) installed at one end thereof; The side branch pipe (1) is provided with a vent hole on a side wall of the compartment plate (11) at a position close to the emptying plate (21).

2. A petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: The exhaust valve (52) is in the shape of a syringe, and the volume of the syringe is larger than that of the sample bottle (5).

3. A petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: The drain rod (22) comprises a polished rod section (221) and a threaded section (222); a sealing sheet (223) is installed in the branch pipe (1); and the polished rod section (221) and the sealing sheet (223) are slidably connected.

4. A petrochemical pipeline closed-circuit sampling device according to claim 3, characterized in that: A limiting plate (224) is fixedly installed at the junction of the polished rod section (221) and the threaded section (222).

5. The petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: A limiting ring (12) is installed on the side of the vent hole of the side branch pipe (1) away from the compartment plate (11).

6. A petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: A pressure gauge is installed at a section of the branch pipe (1) away from the petrochemical pipeline.

7. A petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: The inlet of the sample bottle (5) is provided with a conduit (53), and the outlet of the conduit (53) is located at the bottom of the sample bottle (5).

8. The petrochemical pipeline closed-circuit sampling device according to claim 1, characterized in that: The control valve (31) and the lofting valve (4) are both solenoid valves, and the control circuits of the control valve (31) and the lofting valve (4) are interlocked.

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