CN212932088U

CN212932088U - Gas accumulation sampling system

Info

Publication number: CN212932088U
Application number: CN202021611826.9U
Authority: CN
Inventors: 邵华; 张涛; 申思; 董新利
Original assignee: Beijing Gas Group Co Ltd
Current assignee: Beijing Gas Group Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-04-09
Anticipated expiration: 2030-08-06

Abstract

The utility model discloses a gas accumulation sampling system, which comprises a sampler, a sampling container and a process pipeline, wherein the sampler is respectively connected with the sampling container and the process pipeline through pipelines, the sampler comprises a shell, the shell is a rectangular cavity, the inside of the shell is fixedly connected with a first cylinder body, the first cylinder body is a cylindrical cavity, one end of the first cylinder body is in an open shape, the inside of the first cylinder body is provided with a second cylinder body in a sliding way, the utility model discloses a piston is arranged in the second cylinder body, the piston moves under the action of a movable rod, so that gas in a pipeline is firstly sucked into the first cylinder body, then the piston is contacted with an annular limiting plate, the second cylinder body is driven to move, the gas in the process pipeline is sucked into the first cylinder body, then the gas is injected into the sampling container, and the sampling can be completed by one stroke of the movable rod, greatly improving the sampling efficiency.

Description

Gas accumulation sampling system

Technical Field

The utility model relates to a sampling device technical field, specific field is a gas accumulation sampling system.

Background

Sampling representatives are the primary issues that need to be considered and addressed for analysis. Through research on the working principle, the sampling method and the sampling influence factors of the accumulative sampling, and comparison analysis with other sampling technologies in the aspects of economy and management advantages and comparison conditions of the accumulative sampling analysis data and the on-line gas chromatography analysis data, the accumulative sampling system has wide application prospects at the downstream end of a gas pipe network, namely stations such as a thermal power plant, a large-scale heating plant, an internal handover metering station, CNG (compressed natural gas), LNG (liquefied natural gas) and the like. Meanwhile, the method can also be applied to gate stations as a checking means for on-line data, and samples can be stored to facilitate contention and arbitration.

The existing sampling device forms a loop through a pipeline and a process pipeline, gas is extracted from the loop through a cylinder and then is injected into a sampling container to finish sampling, in order to ensure the representativeness of a sample, the cylinder is generally required to extract the gas from the loop, the gas is injected into the loop, so that the pipeline in the loop is filled with the gas in the process pipeline, and then the gas is injected into the sampling container, so that the sampling efficiency is low, therefore, the gas accumulation sampling system is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas accumulation sampling system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a gas accumulation sampling system comprises a sampler, a sampling container and a process pipeline, wherein the sampler is respectively connected with the sampling container and the process pipeline through pipelines, the sampler comprises a shell, the shell is a rectangular cavity, the inside of the shell is fixedly connected with a first cylinder body, the first cylinder body is a cylindrical cavity, one end of the first cylinder body is in an open shape, the inside of the first cylinder body is provided with a second cylinder body in a sliding manner, the second cylinder body is in a cylindrical cavity, one end of the second cylinder body is in an open shape, the inner surface of the second cylinder body is provided with a first piston in a sliding manner, one side surface of the first piston facing the opening is fixedly connected with a movable rod, the side wall of the second cylinder body is provided with a first one-way valve in a penetrating manner, the inner surface of the second cylinder body corresponds to an annular limiting plate with one end fixedly connected with an opening, the inside of the shell is provided with a driving device for, the utility model discloses a sampling device, including first cylinder body, first three-way valve, one end fixedly connected with air inlet, first three-way valve, second three-way valve, gas outlet, sampling container and sampling opening, first cylinder body keeps away from to correspond open-ended one side lateral wall and is connected with first three-way valve, the one end fixedly connected with air inlet of first three-way valve, the other end of first three-way valve is connected with the second three-way valve, the one end of second three-way valve is connected with the gas outlet, the other end of second three-way valve is connected with the sample connection, the.

Preferably, drive arrangement includes the motor, the motor passes through connecting plate fixed connection and is in the inside of shell, the output fixedly connected with dwang of motor, the dwang with the movable rod spiro union.

Preferably, the inner surface of the first cylinder body is provided with a first sliding block, the outer surface of the second cylinder body is provided with a first sliding groove corresponding to the first sliding block, the inner surface of the second cylinder body is provided with a second sliding block, and the surface of the first piston is provided with a second sliding groove corresponding to the second sliding block.

Preferably, a second check valve is arranged on the end face of the first piston in a penetrating mode.

Preferably, the sampling container comprises a main body, both ends of the main body are open, one end of the main body is connected with the sampling port, and a second piston is arranged in the main body.

Preferably, the sampling container comprises a main body, both ends of the main body are both in an open shape, and both ends of the main body are respectively provided with a valve.

Compared with the prior art, the beneficial effects of the utility model are that: a gas accumulation sampling system. Through setting up first cylinder body and second cylinder body, the second cylinder body is movable in first cylinder body, thereby form the negative pressure and extract gas, through set up the piston in second cylinder body inside, the piston removes under the effect of movable rod, thereby take first with the gas suction first cylinder body in the pipeline, then the piston contacts the back with annular limiting plate, it removes to drive the second cylinder body, inside sucking first cylinder body with the gas in the process line, then pour into the sample container into, the sample can be accomplished to a stroke of movable rod, improve sample efficiency greatly.

Drawings

Fig. 1 is a schematic view of a main sectional structure of a sampler of the present invention;

fig. 2 is a schematic top view of the first cylinder of the present invention;

fig. 3 is a schematic view of the working principle of embodiment 1 of the present invention;

fig. 4 is a schematic view of the working principle of embodiment 2 of the present invention.

In the figure: 1-a process pipeline, 2-a shell, 3-a first cylinder body, 4-a second cylinder body, 5-a first piston, 6-a movable rod, 7-a first one-way valve, 8-an annular limiting plate, 9-a first three-way valve, 10-an air inlet, 11-a second three-way valve, 12-an air outlet, 13-a sampling port, 14-a sampling probe, 15-a motor, 16-a rotating rod, 17-a first sliding block, 18-a first sliding groove, 19-a second sliding block, 20-a second sliding groove, 21-a second one-way valve, 22-a main body, 23-a second piston and 24-a valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the present invention provides a technical solution: a gas accumulation sampling system comprises a sampler, a sampling container and a process pipeline 1, wherein the sampler is respectively connected with the sampling container and the process pipeline 1 through pipelines, as shown in figure 1, the sampler comprises a shell 2, the shell 2 is a rectangular cavity, the inside of the shell 2 is fixedly connected with a first cylinder body 3, the first cylinder body 3 is a cylindrical cavity, one end of the first cylinder body 3 is open, a second cylinder body 4 is arranged inside the first cylinder body 3 in a sliding manner, the second cylinder body 4 is a cylindrical cavity, in order to ensure the sealing property, a rubber pad can be arranged on the outer surface of the second cylinder body 4, one end of the second cylinder body 4 is open, a first piston 5 is arranged on the inner surface of the second cylinder body 4 in a sliding manner, a movable rod 6 is fixedly connected to one side surface of the first piston 5 facing the opening, a side wall of the second cylinder body 4 is provided with a first one-way valve 7 in a penetrating manner, the first check valve 7 is located on one side wall of the second cylinder 4 far away from the corresponding opening, the first check valve 7 enables external air to enter the inside of the second cylinder 4, one end of the inner surface of the second cylinder 4 corresponding to the opening is fixedly connected with an annular limiting plate 8, the movable rod 6 extends out through one end of the annular limiting plate 8, when the movable rod 6 is pulled, the first piston 5 moves inside the second cylinder 4 at present and sucks air in a pipeline into the inside of the second cylinder 4, so the volume of the second cylinder 4 needs to be slightly larger than the total volume of the air in the pipeline, a driving device for driving the movable rod 6 to move is arranged inside the shell 2, when the movable rod 6 moves, the first piston 5 can move first, a spring can be arranged between the first cylinder 3 and the second cylinder 4, and the second cylinder 4 is located at one end of the first cylinder 3 far away from the corresponding opening, the side wall of one side of the first cylinder body 3 far away from the corresponding opening is connected with a first three-way valve 9, one end of the first three-way valve 9 is fixedly connected with an air inlet 10, the other end of the first three-way valve 9 is connected with a second three-way valve 11, one end of the second three-way valve 11 is connected with an air outlet 12, the air inlet 10 and the air outlet 12 form a loop with a process pipeline through a pipeline, the other end of the second three-way valve 11 is connected with a sampling port 13, the air inlet 10 is connected with a sampling probe 14 through the pipeline, the sampling probe 14 is positioned inside the process pipeline 1, the air outlet 12 is connected with the process pipeline 1 through a pipeline, the sampling container is connected with the sampling port 13, wherein the air inlet 10 is connected with a flow regulating valve which can automatically regulate the gas flow, and a pressure transmitter is arranged, the gas flowing out of the sampling port 13 can be pressurized.

Particularly, drive arrangement includes motor 15, motor 15 passes through connecting plate fixed connection and is in the inside of shell 2, the output fixedly connected with dwang 16 of motor 15, dwang 16 with 6 spiro unions of movable rod, dwang 16 and movable rod 6 are located same straight line, and when dwang 16 rotated, drive movable rod 6 through screw-thread fit and drive first piston 5 and remove.

Specifically, as shown in fig. 2, the inner surface of the first cylinder 3 is provided with a first sliding block 17, the outer surface of the second cylinder 4 is provided with a first sliding groove 18 corresponding to the first sliding block 17, the inner surface of the second cylinder 4 is provided with a second sliding block 19, and the surface of the first piston 5 is provided with a second sliding groove 20 corresponding to the second sliding block 19, so that when the rotating rod 16 rotates, the movable rod 6 does not rotate along with the rotating rod 16.

Specifically, a second check valve 21 is provided on an end surface of the first piston 5 so as to pass through, and when the gas in the line is sucked into the second cylinder 4, the gas in the second cylinder 4 can be discharged to the outside of the apparatus through the second check valve 21 after the apparatus is reset.

Specifically, as shown in fig. 3, the sampling container includes a main body 22, both ends of the main body 22 are open, one end of the main body 22 is connected to the sampling port 13, a second piston 23 is disposed inside the main body 22, the second piston 23 is located at one end of the main body 22 close to the sampling port 13, when the gas in the process pipeline 1 flows out through the sampling port 13, the second piston 23 moves under the pressure, so that the gas fills the inside of the main body 22, and a valve is disposed at one end of the main body 22 close to the sampling port 13 and can be closed after the collection is completed.

The working principle is as follows: when the utility model is used, the first three-way valve communicates the air inlet 10 with the first cylinder body 3, the driving device drives the movable rod 6 to move, the movable rod 6 drives the first piston 5 to move in the second cylinder body 4, the gas in the process pipeline 1 enters the pipeline of the device through the sampling probe 14, meanwhile, the gas in the pipeline is sucked into the second cylinder body 4, after the first piston 5 contacts with the annular limiting plate 8, the original residual gas in the pipeline completely enters the inside of the second cylinder body 4, then the second cylinder body 4 moves, the gas in the process pipeline 1 enters the inside of the first cylinder body 3, then the second three-way valve 11 connects the pipeline between the sampling port 13 and the first cylinder body 3, the driving device moves reversely, thereby the gas in the first cylinder body 3 is injected into the sampling container through the sampling port 13, after sampling is completed, the second three-way valve 11 communicates the pipeline between the first cylinder body 3 and the gas outlet 12, the remaining gas in the first cylinder 3 is re-injected into the interior of the process line 1 through the gas outlet 12.

Example 2

Referring to fig. 4, the difference between the present embodiment and embodiment 1 is: as shown in fig. 4, the sampling container includes a main body 22, both ends of the main body 22 are open, valves 24 are respectively disposed at both ends of the main body 22, and when sampling, a sample is pressurized by a pressure transmitter and introduced into the main body 22, so that an excessive amount of gas is introduced into the main body 22, and then the valves 24 at both ends of the main body 22 are closed at the same time, thereby completing the collection of the sample.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A gas accumulation sampling system comprising a sampler, a sampling vessel and a process line (1), the sampler being connected by a pipe to the sampling vessel and the process line (1), respectively, characterized in that: the sampler comprises an outer shell (2), the outer shell (2) is a rectangular cavity, a first cylinder body (3) of the inner fixedly connected with of the outer shell (2), the first cylinder body (3) is a cylindrical cavity, one end of the first cylinder body (3) is in an open shape, a second cylinder body (4) is arranged in the inner sliding of the first cylinder body (3), the second cylinder body (4) is in a cylindrical cavity, one end of the second cylinder body (4) is in an open shape, a first piston (5) is arranged in the inner sliding of the second cylinder body (4), a movable rod (6) is fixedly connected to one side surface of the first piston (5) facing the opening, a first one-way valve (7) is arranged in the side wall of the second cylinder body (4) in a penetrating manner, an annular limiting plate (8) is fixedly connected to one end of the inner surface of the second cylinder body (4) corresponding to the open shape, and a driving device for driving the movable rod (6) to move is arranged in the outer shell, keep away from first cylinder body (3) and correspond open-ended one side lateral wall and be connected with first three-way valve (9), the one end fixedly connected with air inlet (10) of first three-way valve (9), the other end of first three-way valve (9) is connected with second three-way valve (11), the one end of second three-way valve (11) is connected with gas outlet (12), the other end of second three-way valve (11) is connected with sample connection (13), air inlet (10) are passed through the pipe connection has sampling probe (14), sampling probe (14) are located the inside of technology pipeline (1), gas outlet (12) are connected with technology pipeline (1) through the pipeline, the sample container with sample connection (13) are connected.

2. A gas accumulation sampling system as in claim 1, wherein: drive arrangement includes motor (15), motor (15) pass through connecting plate fixed connection and be in the inside of shell (2), the output fixedly connected with dwang (16) of motor (15), dwang (16) with movable rod (6) spiro union.

3. A gas accumulation sampling system as in claim 2, wherein: the inner surface of the first cylinder body (3) is provided with a first sliding block (17), the outer surface of the second cylinder body (4) is provided with a first sliding groove (18) corresponding to the first sliding block (17), the inner surface of the second cylinder body (4) is provided with a second sliding block (19), and the surface of the first piston (5) is provided with a second sliding groove (20) corresponding to the second sliding block (19).

4. A gas accumulation sampling system as in claim 3, wherein: and a second one-way valve (21) penetrates through the end surface of the first piston (5).

5. A gas accumulation sampling system as in any of claims 1 to 4, wherein: the sampling container comprises a main body (22), wherein both ends of the main body (22) are both in an open shape, one end of the main body (22) is connected with the sampling port (13), and a second piston (23) is arranged in the main body (22).

6. A gas accumulation sampling system as in any of claims 1 to 4, wherein: the sampling container comprises a main body (22), wherein both ends of the main body (22) are both in an open shape, and both ends of the main body (22) are respectively provided with a valve (24).