CN212513842U

CN212513842U - Gas hydrocarbon sampling device

Info

Publication number: CN212513842U
Application number: CN202020379652.1U
Authority: CN
Inventors: 唐海飞; 索杏兰; 雷高云; 高飞; 孙佳妮; 孟丽双; 罗容; 段余龙
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2021-02-09
Anticipated expiration: 2030-03-23

Abstract

The utility model provides a gas hydrocarbon sampling device, which comprises a sampler, a sample guide pipe for guiding a sample to the interior of the sampler, and a plurality of groups of flushing components for replacing residual samples in the sampler, wherein the sample guide pipe is arranged along the length direction of the sampler, one end of the sample guide pipe is communicated with an inlet of the sampler, and the other end is a closed end; the multiunit the flush subassembly is followed the length direction interval arrangement of sample stand pipe, just the flush subassembly includes a plurality ofly converts the sample into the high-speed washing through-hole that washes of fluid, wash the through-hole for the through-hole of venturi structure. The utility model has the advantages of good cleaning effect, convenient cleaning, low labor intensity, high safety and the like.

Description

Gas hydrocarbon sampling device

Technical Field

The utility model relates to a gas hydrocarbon sample field especially relates to a gas hydrocarbon sampling device.

Background

According to the quality inspection and detection requirements of oil and gas products, the quality index detection of light hydrocarbon, liquefied gas, natural gas and other gas and hydrocarbon oil and gas products is generally carried out monthly. At present, a seamless gas cylinder is generally adopted as a sampler in a gas hydrocarbon sampling mode, and the sampling operation is carried out by matching with adapter joints and metal hoses with different specifications. Before sampling, the two ends of the metal hose are connected with the adapter, then respectively connected with the sampling port of the gas-hydrocarbon pipeline and the inlet of the sampler, a sample with about 1/5 volumes of the sampler is taken to clean the sampler, and finally a sample required by detection is taken. However, the existing sampling device has the following problems:

(1) the existing cleaning mode of the sampler is usually manual cleaning, namely the mode of manually shaking the sampler is adopted to achieve the purpose of cleaning, repeated sampling is needed for cleaning, the cleaning effect is poor, the cleaning is complicated, and the efficiency is low; simultaneously, sampler weight is heavy, and the abluent mode operation of manual vibration is very inconvenient, and intensity of labour is big, the safety risk is high.

(2) The existing sampling device has pressure in the metal hose after sampling is finished, and volatile, inflammable and explosive samples in the metal hose can be splashed to the ground and an operator in the disassembling process, so that potential safety hazards exist, and the environmental protection property is poor.

(3) The waste liquid for cleaning the sampler is basically recycled by adopting an open container, so that certain safety risk exists, and resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a cleaning performance is good, the washing is convenient, low in labor strength, and the high hydrocarbon sampling device of security.

In order to solve the technical problem, the utility model provides a technical scheme does:

a gas hydrocarbon sampling device comprises a sampler, a sample guide pipe for guiding a sample to the interior of the sampler, and a plurality of groups of flushing assemblies for replacing residual samples in the sampler, wherein the sample guide pipe is arranged along the length direction of the sampler, one end of the sample guide pipe is communicated with an inlet of the sampler, and the other end of the sample guide pipe is a closed end; the multiunit the flush subassembly is followed the length direction interval arrangement of sample stand pipe, just the flush subassembly includes a plurality ofly converts the sample into the high-speed washing through-hole that washes of fluid, wash the through-hole for the through-hole of venturi structure.

As a further improvement of the above technical solution:

the flushing through hole comprises an inlet constant-diameter section, a contraction section, a throat section and a diffusion section which are sequentially communicated, the inlet constant-diameter section is communicated with an inner cavity of the sample guide tube, and the diffusion section is communicated with an inner cavity of the sampler.

The flushing through holes of each group of flushing assemblies are arranged at intervals along the circumference of the sample guide pipe.

The spacing distance of the washing components and the spacing distance of the washing through holes are the spacing distances selected for the standard to ensure that the washing range covers the interior of the sampler.

The gas hydrocarbon sampling device also comprises a sample input channel, a pressure relief discharge channel for relieving the pressure of the sample input channel after sampling, and an input control valve for controlling the on-off of the inlet of the pressure relief discharge channel, wherein the sample input channel is communicated with the inlet end of the sampler, the inlet end of the pressure relief discharge channel is communicated with the sample input channel, and the input control valve is arranged at the inlet position of the pressure relief discharge channel.

The gas hydrocarbon sampling device also comprises a sewage channel for discharging residual samples before sampling by the sampler, and the sewage channel is communicated with the outlet end of the sampler; the outlet end of the pressure relief discharge channel is communicated with the sewage discharge channel, and an output control valve is arranged at the outlet of the pressure relief discharge channel.

The inlet and outlet ends of the pressure relief discharge channel are all three-way connecting pieces, and the sampler, the sample input channel and the sewage discharge channel are detachably mounted on the three-way connecting pieces through threaded connectors.

The pressure relief discharge channel is provided with a first pressure detection piece for ensuring pressure emptying of the sample input channel, and the input control valve and the output control valve are closed when the detection value of the first pressure detection piece is zero.

The inlet and outlet end of the sampler are respectively provided with a sampling control valve, the sampler is provided with a second pressure detection part, the sampling control valves are opened when the sampler is cleaned, the sampling control valve at the outlet end of the sampler is closed when the sampler takes a sample, and the sampling control valve at the inlet end of the sampler is closed when the detection value of the second pressure detection part and the pressure value of an external input pipeline are the same.

Compared with the prior art, the utility model has the advantages of:

the utility model is provided with a sample guide pipe and a washing component, wherein the sample guide pipe is arranged along the length direction of the sampler, one end of the sample guide pipe is communicated with the inlet of the sampler, and the other end is a closed end, so that the sample is guided to a target position in the sampler; a plurality of washing assemblies are arranged along the length direction of the sampler, and the washing structure is simple, the layout is compact, and the cost is low.

Meanwhile, the flushing component comprises a flushing through hole of a Venturi structure, the Venturi structure enables a sample to be converted into high-speed flushing fluid after passing through the flushing through hole, and the high-speed flushing fluid is fully mixed with the residual sample in the sampler, so that the residual sample in the sampler can be flushed and replaced by the high-speed flushing fluid, repeated sampling is not needed, the cleaning effect is good, sample pollution is avoided, and the accuracy of sample detection is ensured; and simultaneously, the utility model discloses a form of sample stand pipe and washing component combination has replaced the washing mode that artifical shock completely, has realized the self-cleaning of sampler, and it washs conveniently, efficient, has avoided the emergence that artifical washing intensity of labour is big, installation risk scheduling problem.

Further, the utility model discloses add the pressure release exhaustchannel, the entrance point and the sample input channel intercommunication of pressure release exhaustchannel can be emptied the pressure in the sample input channel through opening the pressure release exhaustchannel after the sample is accomplished, and it has avoided the pipeline area to press the emergence of sample splash phenomenon when dismantling, has improved the security and the feature of environmental protection of operation.

Further, the utility model discloses still add the drain channel, the exit end intercommunication of drain channel and sampler, it makes remaining sample discharge through inclosed drain channel, has avoided adopting the emergence of open container safety risk height, wasting of resources phenomenon, and it makes the blowdown process safe, environmental protection. Simultaneously, the exit end and the blowdown passageway intercommunication of pressure release discharge passage, it makes the pressure release fluid integrate to the blowdown passageway and discharges, and its whole overall arrangement is compact, has realized the integrated operation that sampling device washs, sample and pressure release were discharged, has effectively reduced personnel's intensity of labour and safety risk.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is a schematic structural diagram of the gas hydrocarbon sampling device of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

The reference numerals in the figures denote:

1. a sampler; 11. a sampling control valve; 12. a second pressure detecting member; 2. a sample guide tube; 3. a flushing assembly; 31. flushing the through hole; 311. an inlet constant diameter section; 312. a contraction section; 313. a throat section; 314. a diffuser section; 4. a sample input channel; 5. a pressure relief vent passage; 51. inputting a control valve; 52. a first pressure detecting member; 53. an output control valve; 54. a tee joint connector; 6. a trapway; 7. provided is a threaded joint.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples, but the scope of the invention is not limited thereto.

Fig. 1 and 2 show an embodiment of the present invention, which is suitable for sampling of oil and gas products such as light hydrocarbon, liquefied gas and natural gas. In this embodiment, the gaseous hydrocarbon sampling apparatus includes a sampler 1, a sample guide tube 2, and a flush assembly 3. The sampler comprises a sampler 1, a sample guide pipe 2, a sample guide pipe and a sampling device, wherein the sample guide pipe 2 is arranged along the length direction of the sampler 1, one end of the sample guide pipe 2 is communicated with an inlet of the sampler 1, and the other end of the sample guide pipe 2 is a closed end, so that a sample is guided to a target position in the sampler 1 through the sample guide; the multiple groups of flushing assemblies 3 are arranged at intervals along the length direction of the sample guide pipe 2, and the cleaning structure is simple, the layout is compact, and the cost is low.

Meanwhile, the flushing assembly 3 comprises a plurality of flushing through holes 31, and the flushing through holes 31 are venturi-structured through holes. The venturi structure enables the sample to be converted into high-speed flushing fluid after passing through the flushing through hole 31, and the high-speed flushing fluid is fully mixed with the residual sample in the sampler, so that the residual sample in the displacement sampler 1 can be flushed by the high-speed flushing fluid, repeated sampling is not needed, the cleaning effect is good, sample pollution is avoided, and the accuracy of sample detection is ensured; and simultaneously, the utility model discloses a form of

sample stand pipe

2 and 3 combinations of flushing component has replaced the washing mode that the manual work was vibrate completely, has realized sampler 1's self-cleaning, and it washs conveniently, efficient, has avoided the emergence that the manual cleaning intensity of labour is big, installation risk scheduling problem.

As shown in fig. 2, in the present embodiment, the flushing through hole 31 includes an inlet equal diameter section 311, a contraction section 312, a throat section 313 and a diffusion section 314, which are sequentially communicated; meanwhile, the inlet constant diameter section 311 is communicated with the inner cavity of the sample guide tube 2, and the diffusion section 314 is communicated with the inner cavity of the sampler 1, so that a high-speed flushing channel for communicating the sample guide tube 2 with the sampler 1 is formed. Specifically, the sample enters the flushing through hole 31 through the inlet constant diameter section 311; because the cross-sectional area of the contraction section 312 is gradually reduced and the internal pressure is gradually increased, the flow rate of the sample entering the contraction section is also gradually increased; the accelerated sample enters the diffusion section 314 through the throat section 313 and then expands rapidly to form a swirling flow, and the sample is converted into a high-speed flushing fluid and is fully mixed. Namely the utility model discloses a wash through-hole 31 and adopt the through-hole of venturi structure, realized that the inside high-speed of remaining sample of sampler 1 washes, its simple structure, washing effect are good.

In this embodiment, the diameter of the inlet constant diameter section 311 is 20mm, and the length of the inlet constant diameter section 311 is 5 mm; the length of the contraction section 312 is 17mm, and the contraction angle is 20; the diameter of the throat 313 is 7.6mm, and the length of the throat 313 is 5 mm; the diffuser section 314 has a length of 5mm and a divergence angle of 60 °. In other embodiments, the size and angle of the inlet constant diameter section 311, the convergent section 312, the throat section 313, and the divergent section 314 are such as to ensure that the sample forms a high velocity flush fluid.

Further, the flushing through holes 31 of each set of flushing assemblies 3 are arranged at intervals along the circumference of the sample guide tube 2, and the flushing through holes 31 are located in the same vertical plane. The circumferentially arranged flushing through holes 31 ensure an effective flushing of the residual sample around circumferentially inside the sampler 1. In other embodiments, the position of the flushing through holes 31 may be set as long as the flushing range can be ensured to cover the inside of the sampler 1, and if the flushing through holes 31 are staggered along the length direction of the sample guide tube 2, that is, not arranged in the same vertical plane.

In this embodiment, the washing component 3 is five groups, and the washing through holes 31 of each group of washing component 3 are two, and in other embodiments, the spacing distance of the washing component 3 and the spacing distance of the washing through holes 31 only need to ensure that the washing range covers the inside of the sampler 1, and if the washing component 3 can also be set to three groups, four groups, six groups, etc., the washing through holes 31 can also be set to three groups, four groups, etc. Meanwhile, if the sample guide tube 2 is weak due to the arrangement of the flushing assembly 3 and the flushing through hole 31, a support member may be provided to the sample guide tube 2.

Further, the gaseous hydrocarbon sampling device further comprises a sample input channel 4, a pressure relief vent channel 5 and an input control valve 51. Wherein, two ends of the sample input channel 4 are respectively communicated with a sampling port of a gas hydrocarbon pipeline and an inlet end of the sampler 1 so as to convey a gas hydrocarbon sample into the sampler 1; the inlet end of the pressure relief and discharge channel 5 is communicated with the sample input channel 4 so as to perform pressure relief and emptying on the sample input channel 4 after sampling is completed; the input control valve 51 is arranged at the inlet position of the pressure relief discharge channel 5 to control the on-off of the inlet of the pressure relief discharge channel 5. Namely the utility model discloses add pressure release discharge passage 5, can unload the pressure in the sample input passage 4 through opening input control valve 51 after the sample is accomplished, it has avoided the pipeline area to press the emergence of sample splash phenomenon when dismantling, has improved the security and the feature of environmental protection of operation.

Furthermore, the gas hydrocarbon sampling device also comprises a sewage channel 6, wherein the sewage channel 6 is communicated with the outlet end of the sampler 1, so that residual samples before sampling are discharged through the closed sewage channel 6, the phenomena of high safety risk and resource waste caused by adopting an open container for sewage discharge are avoided, and the sewage discharge process is safe and environment-friendly.

Meanwhile, the outlet end of the pressure relief discharge channel 5 is communicated with the sewage discharge channel 6, so that pressure relief fluid is integrated to the sewage discharge channel 6 and discharged, the whole layout is compact, the integrated operation of cleaning, sampling and pressure relief discharge of the sampling device is realized, and the labor intensity and safety risk of personnel are effectively reduced. And the outlet position of the pressure relief discharge channel 5 is provided with an output control valve 53 to prevent the discharged residual sample from entering the pressure relief discharge channel 5 when the sampler 1 is cleaned, thereby ensuring the reliable operation of the device.

As shown in FIG. 1, the inlet and outlet ends of the pressure relief vent passage 5 are all three-way connectors 54, and the sampler 1, the sample input passage 4 and the sewage draining passage 6 are all detachably mounted on the three-way connectors 54 through threaded joints 7. It makes each part of sampling device dismouting alone, makes things convenient for follow-up maintenance.

Further, the first pressure detection part 52 is arranged on the pressure relief discharge channel 5, and the input control valve 51 and the output control valve 53 are closed when the detection value of the first pressure detection part 52 is zero, so that the pressure in the sample input channel 4 is completely discharged, and the operation safety of the sampling device is further ensured.

Furthermore, the inlet and outlet ends of the sampler 1 are respectively provided with a sampling control valve 11, and the sampler 1 is provided with a second pressure detection part 12. Wherein, the two groups of sampling control valves 11 are opened when the sampler 1 is cleaned; the sampling control valve 11 at the outlet end of the sampler 1 is closed when the sampler 1 samples; the sampling control valve 11 at the inlet end of the sampler 1 is closed when the detected value of the second pressure detecting member 12 is the same as the pressure value of the external input line to complete sampling. It has realized that sampling device washs, takes a sample and goes on smoothly that the pressure release was discharged.

In this embodiment, the sample input channel 4 and the sewage draining channel 6 are stainless steel metal hoses; the pressure relief vent passage 5 and the sample guide pipe 2 are stainless steel pipes. The stainless steel metal hose and the stainless steel pipe have an inner diameter of 16.1mm and an outer diameter of 19.5 mm. Meanwhile, the pressure bearing of the sample input channel 4, the sewage discharge channel 6 and the pressure relief discharge channel 5 is 4 MPa; the pressure bearing of the sample guide tube 2 and the sampler 1 is 10 MPa. In other embodiments, the size and pressure-bearing capacity of the stainless steel metal hose and the stainless steel pipe can be adjusted according to actual conditions.

In this embodiment, the sampling method of the gas hydrocarbon sampling device is as follows:

1) firstly, the inlet end of a decompression discharge channel 5 is connected with the inlet end of a sampler 1 and one end of a sample input channel 4 through a three-way connecting piece 54, and the other end of the sample input channel 4 is connected with a sampling port of a gas hydrocarbon pipeline; the outlet end of the pressure relief discharge channel 5 is connected with the outlet section of the sampler 1 and one end of the sewage discharge channel 6 through another three-way connecting piece 54, and the other end of the sewage discharge channel 6 is connected with an external sewage discharge pipeline.

2) The input control valve 51 and the output control valve 53 at both ends of the decompression exhaust passage 5 are closed, and the valve of the external blowdown line, the valve of the gas hydrocarbon line, and the sampling control valve 11 at both ends of the sampler 1 are opened to perform replacement cleaning.

3) After cleaning, the sampling control valve 11 at the outlet end of the sampler 1 is closed to perform sampling, and when the detection value of the second pressure detection member 12 is the same as the pressure value of the gas hydrocarbon pipeline, the sampling control valve 11 at the inlet end of the sampler 1 and the valve of the gas hydrocarbon pipeline are closed to complete sampling.

4) And opening the input control valve 51 and the output control valve 53 at the two ends of the pressure relief and discharge channel 5 to perform pressure relief and pollution discharge so as to complete the whole sampling operation.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The gas hydrocarbon sampling device is characterized by comprising a sampler, a sample guide pipe for guiding a sample to the interior of the sampler, and a plurality of groups of flushing assemblies for replacing residual samples in the sampler, wherein the sample guide pipe is arranged along the length direction of the sampler, one end of the sample guide pipe is communicated with an inlet of the sampler, and the other end of the sample guide pipe is a closed end; the multiunit the flush subassembly is followed the length direction interval arrangement of sample stand pipe, just the flush subassembly includes a plurality ofly converts the sample into the high-speed washing through-hole that washes of fluid, wash the through-hole for the through-hole of venturi structure.

2. The gaseous hydrocarbon sampling device of claim 1, wherein the flushing through-hole comprises an inlet constant diameter section, a constriction section, a throat section and a diffuser section in sequential communication, the inlet constant diameter section being in communication with the inner cavity of the sample guide tube, the diffuser section being in communication with the inner cavity of the sampler.

3. The gaseous hydrocarbon sampling apparatus of claim 1, wherein the flushing through-holes of each set of the flushing assemblies are spaced circumferentially along the sample guide tube.

4. The gaseous hydrocarbon sampling apparatus of claim 3, wherein the flush assembly and the flush through-hole have a flush range that covers the interior of the sampler.

5. The gas hydrocarbon sampling device according to any one of claims 1 to 4, further comprising a sample input channel, a pressure relief discharge channel for relieving pressure of the sample input channel after sampling, and an input control valve for controlling the on-off of an inlet of the pressure relief discharge channel, wherein the sample input channel is communicated with the inlet end of the sampler, the inlet end of the pressure relief discharge channel is communicated with the sample input channel, and the input control valve is arranged at the inlet of the pressure relief discharge channel.

6. The gaseous hydrocarbon sampling apparatus of claim 5, further comprising a trapway for discharging a residual sample prior to sampling by the sampler, the trapway communicating with the outlet end of the sampler; the outlet end of the pressure relief discharge channel is communicated with the sewage discharge channel, and an output control valve is arranged at the outlet of the pressure relief discharge channel.

7. The hydrocarbon sampling device of claim 6, wherein the inlet and outlet ends of the pressure relief vent channel are all three-way connectors, and the sampler, the sample inlet channel and the drainage channel are all detachably mounted on the three-way connectors through threaded joints.

8. The hydrocarbon sampling device of claim 6, wherein the pressure relief vent channel is provided with a first pressure detection member for ensuring pressure emptying of the sample input channel, and the input control valve and the output control valve are closed when a detection value of the first pressure detection member is zero.

9. The gas hydrocarbon sampling device according to any one of claims 1 to 4, wherein the inlet and outlet ends of the sampler are respectively provided with sampling control valves, the sampler is provided with a second pressure detection member, two sets of the sampling control valves are opened when the sampler is cleaned, the sampling control valve at the outlet end of the sampler is closed when the sampler performs sampling, and the sampling control valve at the inlet end of the sampler is closed when the detection value of the second pressure detection member is the same as the pressure value of the external input pipeline.