Full-automatic closed gas sampling device

Abstract

The invention belongs to the technical field of liquid or gas medium sampling equipment, and particularly relates to a full-automatic closed gas sampling device which comprises a box body, a pipeline system and a sampling bottle, a linkage ball valve of the pipeline system is connected with the first pipeline to the fifth pipeline so as to control communication between the pipelines. The pipelines 1-5 are correspondingly connected with a to-be-sampled source, a waste discharge pipeline, a quick connector, a purging gas source, a pipeline 7 and the like respectively; and the PLC is used for coordination and control. According to the scheme, full-automatic closed sampling is adopted, the probability of medium leakage is low, and the sampling requirements of various environments and medium working conditions can be met, such as places with anti-explosion requirements; the functions of timing, regular random sampling, real-time multi-point synchronous sampling and the like can be realized through the PLC; automation of the whole sampling process is facilitated, and the personal safety and the sampling efficiency in the sampling process are improved; and the PLC is also convenient for a background to carry out remote automatic sampling and monitoring feedback, so that task requirements under different conditions are met.

Description

Technical Field

[0001] The invention belongs to the technical field of sampling equipment for liquid or gaseous media, and in particular relates to a fully automatic closed gas sampling device. Background Art

[0002] In the oil and gas, chemical, petrochemical, hydrogen energy and electric power industries, pipelines are often used to transport liquids or gases. During transportation, it is often necessary to sample the medium in the main pipeline. Currently, sampling is often done manually, which is not only prone to errors during the cumbersome sampling process, affecting the sampling quality, but also poses a safety hazard to the safety of sampling personnel due to special hazardous media.

[0003] Therefore, it is necessary to design an automatic sampling device with high sealing performance and the ability to reduce medium leakage. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a fully automatic closed gas sampling device.

[0005] The technical solution adopted by the present invention is:

[0006] A fully automatic closed gas sampling device comprises a box body and a pipeline system and a sampling bottle arranged in the box body;

[0007] The box is provided with a sampling station for placing a sampling bottle; switch valves are provided at both ends of the sampling bottle, namely switch valve 1 and switch valve 2; two quick-plug connectors are provided at the sampling station, namely quick-plug connector 1 and quick-plug connector 2; the two quick-plug connectors are movable, so that the quick-plug connector 1 can be plugged into or unplugged from the switch valve 1, and the quick-plug connector 2 can be plugged into or unplugged from the switch valve 2;

[0008] The pipeline system includes a linkage ball valve, which is connected to pipeline one, pipeline two, pipeline three, pipeline four, and pipeline five respectively. The linkage ball valve can control pipeline three to be connected to pipeline one or pipeline two, or control pipeline four to be connected to pipeline two or pipeline five; pipeline one and pipeline five are respectively connected to the upstream and downstream of the source to be sampled, pipeline two is used to connect the waste discharge pipeline, pipeline three is connected to quick connector one, and pipeline four is connected to quick connector two; pipeline six is ​​connected to pipeline four and is used to connect to the purge gas source; pipeline seven is connected between pipeline three and pipeline four;

[0009] A PLC controller is also provided in the box body, and the PLC controller is used to control the reversing action of the linkage ball valve, the switching action of the valve on the pipeline, and the plugging and pulling action of the quick-connect connector and the switch valve.

[0010] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: an electric ball valve 1, a one-way valve 1 and a pressure regulating valve are connected in series on the pipeline 6.

[0011] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: a flow regulating valve, an electric ball valve 2 and a cooling tank are connected in series on pipeline one.

[0012] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: a cooling coil is arranged in the cooling tank, and the two ends of the cooling coil are connected to pipeline eight and pipeline nine respectively, an electric ball valve two is connected in series on pipeline eight, and a manual ball valve one is connected in series on pipeline nine.

[0013] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: a one-way valve two is connected in series on pipeline five, a one-way valve three is connected in series on pipeline two, and a one-way valve four is connected in series on pipeline seven.

[0014] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: servo electric cylinder 1 and servo electric cylinder 3 are fixed in the box; quick-connect connector 1 is connected to the telescopic end of servo electric cylinder 1, and when servo electric cylinder 1 is extended, quick-connect connector 1 can be plugged into switch valve 1; quick-connect connector 2 is connected to the telescopic end of servo electric cylinder 3, and when servo electric cylinder 3 is extended, quick-connect connector 2 can be plugged into switch valve 3.

[0015] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: a pallet is arranged in the box body, and the bottom of the pallet is connected to the inner wall of the box body through a guide rail; a sample bottle access port is arranged on the front side wall of the box body, and the front end of the pallet can extend out of the box body from the sample bottle access port so as to fix the sampling bottle to the pallet; a servo electric cylinder 2 is fixed in the box body, and the telescopic end of the servo electric cylinder 2 is connected to the pallet to control the movement of the pallet.

[0016] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: a servo electric cylinder five is fixed on the rear side of the support plate, the telescopic end of the servo electric cylinder five is connected to a sample bottle clamp, and a sample bottle baffle is fixed on the front edge of the support plate, and the sample bottle clamp can cooperate with the sample bottle baffle to clamp the sampling bottle.

[0017] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: the switch valve adopts a needle valve; a stand is arranged in the box body, and a servo electric cylinder four is fixed on the stand, and the telescopic end of the servo electric cylinder four is connected to a switch handle assembly, and the switch handle assembly is provided with a U-shaped fork corresponding to the switch valve; the U-shaped fork can be forked into the handle of the switch valve; when the servo electric cylinder four is extended and retracted, the U-shaped fork can lift or lower the handle of the switch valve to realize the switching of the switch valve.

[0018] As an alternative or supplement to the above-mentioned fully automatic closed gas sampling device: When the gas sampling device is used, it includes the following process stages:

[0019] Preparation stage: Place the sampling bottle on the pallet, and place the switch valve 1 and switch valve 2 of the sampling bottle on the positioning block 1 and positioning block 2 respectively; the PLC controller controls the servo electric cylinder 5 to make the sample bottle clamping block press against the sampling bottle; then, the PLC controller controls the servo electric cylinder 2 to retract the pallet to the sample bottle access port and place it at the sampling station; then, the PLC controller controls the servo electric cylinder 1 and servo electric cylinder 3 to make the quick connector 1 and quick connector 2 plug into the switch valve 1 and switch valve 2;

[0020] Cooling stage: using circulating water to cool the gas in pipeline 1;

[0021] Replacement stage: connect the medium to be sampled to pipeline one, and the PLC controller controls the linkage ball valve to connect pipeline one with pipeline two, so that the medium to be sampled passes through the electric ball valve two, flow regulating valve, cooling tank, temperature sensor on pipeline one in turn, and then flows into pipeline two through the linkage ball valve, and is discharged through pipeline two;

[0022] Sampling stage: PLC controller controls the multifunctional linkage ball valve to connect pipeline 1 with pipeline 3, pipeline 4 with pipeline 5, and servo electric cylinder 4 opens switch valve 1 and switch valve 2 through the switch handle assembly, so that the medium to be sampled can flow through pipeline 1, pipeline 3, sampling bottle, pipeline 4, and pipeline 5 in sequence to complete medium sampling;

[0023] Purge stage: After the medium sampling is completed, the PLC controller controls the servo electric cylinder 4 to move the switch handle assembly downward to close the switch valve 1 and the switch valve 2; then, the PLC controller opens the purge pipeline 6 and the linkage ball valve to connect pipeline 2 with pipeline 3 and pipeline 4 with pipeline 6, so that the nitrogen used for purge can purge the entire pipeline system; the nitrogen purge path is: pipeline 6, pipeline 4, pipeline 7, pipeline 3, pipeline 2;

[0024] Sampling completed: After nitrogen purging is completed, the PLC controller closes pipeline six, and controls servo electric cylinder one and servo electric cylinder two to pull out quick-connector one and quick-connector two;

[0025] Final completion: The PLC controller controls the servo electric cylinder five to push the pallet out of the box; then, the PLC controller controls the servo electric cylinder four to retract the sample bottle clamp to release the sampling bottle, making it easier for the operator to take out or replace the sampling bottle.

[0026] The beneficial effects of the present invention are:

[0027] 1. This solution is a fully automatic closed sampling solution. During the sampling process, pipelines are used to transport the medium. The probability of medium leakage is low. It can be applied to sampling needs in a variety of environments and medium conditions, especially sampling needs under some special medium conditions, such as places with explosion-proof requirements.

[0028] 2. This solution uses a PLC controller to control the pipeline system and provides a variety of sampling auxiliary functions, such as timing, periodic random sampling, real-time multi-point synchronous sampling, etc. The automatic control of the PLC controller helps to realize the automated management of the entire sampling process, reduce the errors caused by human operation factors, and improve personal safety and sampling efficiency during the sampling process.

[0029] 3. In addition, the PLC controller can also communicate with the background or cloud, providing conditions for the realization of background remote automatic sampling, monitoring feedback and other functions. The operation process and progress can be directly displayed on the display screen to meet the task requirements under different conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0031] Figure 1 It is the overall structure diagram of the gas sampling device in this scheme;

[0032] Figure 2 It is the internal structure diagram of the gas sampling device in this scheme;

[0033] Figure 3 It is the internal structure diagram of the other side of the gas sampling device in this scheme;

[0034] Figure 4 It is a schematic diagram of the sampling bottle changing mechanism.

[0035] Figure 5 This is a partial structural diagram of a switch valve;

[0036] Figure 6 This is a partial structural diagram of the switch valve.

[0037] Figure 7 It is a structural diagram of the piping system.

[0038] In the figure: 1-display screen; 2-box; 3-indicator light; 4-electric ball valve 1; 5-check valve 1; 6-pressure regulating valve; 7-check valve 2; 8-flow regulating valve; 9-electric ball valve 2; 10-cooling tank; 11-electric ball valve 2; 12-manual ball valve 1; 13-check valve 3; 14-pressure sensor; 15-temperature sensor; 16-check valve 4; 17-linked ball valve; 18-pipeline 1; 19-pipeline 2; 20-pipeline 3; 21-pipeline 4; 22-pipeline 5; 23-pipeline 6; 24 -Pipeline seven; 25-Pipeline eight; 26-Pipeline nine; 27-Servo electric cylinder two; 28-Servo electric cylinder one; 29-Switch valve one; 30-Quick-connector one; 31-Positioning block one; 32-Sample bottle clamp; 33-Guide rail one; 34-Sample bottle baffle; 35-Sampling bottle; 36-Pallet; 37-Positioning block two; 38-Quick-connector two; 39-Switch valve two; 40-Switch handle assembly; 41-Guide rail two; 42-Servo electric cylinder three; 43-Servo electric cylinder four; 44-Servo electric cylinder five; 45-Sample bottle access port. DETAILED DESCRIPTION

[0039] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0040] Example 1

[0041] like Figures 1 to 7 As shown, this embodiment designs a fully automatic closed gas sampling device, including a box body 2, a sampling bottle 35, a piping system, a sampling bottle replacement mechanism, a PLC controller and other components. A plurality of compartments are arranged in the box body 2, and the PLC controller and related electrical parts can be installed in separate compartments, thereby separating the electrical part from the mechanical part to meet the requirements of different working conditions such as ordinary and explosion-proof.

[0042] A sampling station is provided on the sampling bottle replacement mechanism in the box 2, and the sampling station is used to place the sampling bottle 35. When the sampling bottle 35 is placed at the sampling station, it can be connected to the pipeline system to facilitate the medium to be sampled to enter the sampling bottle 35.

[0043] The left and right ends of the sampling bottle 35 are both provided with switch valves, namely switch valve 1 29 and switch valve 2 39; two quick-connect connectors are provided at the sampling station, namely quick-connect connector 1 30 and quick-connect connector 2 38; the two quick-connect connectors can move forward and backward under the control of the sampling bottle changing mechanism, so that the quick-connect connector 1 30 can be plugged into or unplugged from the switch valve 1 29, and the quick-connect connector 2 38 can be plugged into or unplugged from the switch valve 2 39.

[0044] The pipeline system includes a linkage ball valve 17 and pipeline one 18, pipeline two 19, pipeline three 20, pipeline four 21, pipeline five 22, pipeline six 23, pipeline seven 24, pipeline eight 25, etc.

[0045] The linkage ball valve 17 is connected to pipeline 1 18, pipeline 2 19, pipeline 3 20, pipeline 4 21, and pipeline 5 22 respectively. The linkage ball valve 17 can control pipeline 3 20 to be connected to pipeline 1 18 or pipeline 2 19, or control pipeline 4 21 to be connected to pipeline 2 19 or pipeline 5 22; the linkage ball valve 17 can adopt a multi-way reversing valve to realize the switching on and off between pipelines. The linkage ball valve 17 is a commercially available product (the model of the linkage ball valve 17 should be provided here), and will not be described in detail here.

[0046] The pipeline 18 and pipeline 5 22 are respectively connected to the upstream and downstream of the source to be sampled. A flow regulating valve 8, an electric ball valve 29 and a cooling tank 10 are connected in series on the pipeline 18. The pipeline 1 can be opened by opening the flow regulating valve 8 and the electric ball valve 29. A check valve 27 is connected in series on the pipeline 5 22. A cooling coil is arranged in the cooling tank 10, and the two ends of the cooling coil are correspondingly connected to the pipeline 8 25 and the pipeline 9 26. An electric ball valve 29 is connected in series on the pipeline 8 25. The pipeline 8 25 can be opened by opening the electric ball valve 29. A manual ball valve 12 is connected in series on the pipeline 9 26. The pipeline 9 26 can be opened by opening the manual ball valve 12.

[0047] The second pipeline 19 is used to connect the waste discharge pipeline, and the second pipeline 19 is connected in series with a one-way valve 3 13 .

[0048] Pipeline three 20 is connected to quick-connect connector one 30, and pipeline four 21 is connected to quick-connect connector two 38; pipeline three 20 can send the medium to be sampled into the sampling bottle 35, and pipeline four 21 can send part of the medium to be sampled in the sampling bottle 35 out.

[0049] Pipeline six 23 is connected to pipeline four 21 and is used to connect to the purge gas source; the pipeline six 23 is connected in series with an electric ball valve 4, a one-way valve 5 and a pressure regulating valve 6. Pipeline six 23 can be opened by opening the electric ball valve 4 and the pressure regulating valve 6.

[0050] A pipeline seven 24 is connected between pipeline three 20 and pipeline four 21; a one-way valve four 16 is connected in series to pipeline seven 24, and the one-way valve four 16 allows the medium in pipeline four 21 to flow into pipeline three 20, but does not allow the medium in pipeline three 20 to flow into pipeline four 21.

[0051] A PLC controller is also provided in the box 2, and the PLC controller is used to control the reversing action of the linkage ball valve 17, the switching action of the valve on the pipeline, and the plugging and unplugging action of the quick-connect connector and the switch valve. A display screen 1 is also provided on the PLC controller, and the display screen 1 is used to display the sampling stage status and the real-time parameters during the sampling process. An indicator light 3 is provided on the top of the PLC controller, and the indicator light 3 can display different lights in different sampling states, thereby indicating the current state.

[0052] In this solution, during the medium sampling process, the entire pipeline system is separated from the space inside the box 2, so that the sampling environment is relatively closed. In addition, the box 2 can also separate the sampling bottle and the pipeline system from the external environment, thereby achieving relative closure and reducing the impact of medium leakage on the external environment.

[0053] Embodiment 2:

[0054] like Figures 1 to 7 As shown, the sampling bottle replacement mechanism in Example 1 can use the structure in this embodiment.

[0055] The sampling bottle replacement mechanism includes a servo electric cylinder 27, a servo electric cylinder 1 28, a switch valve 1 29, a quick-connect connector 1 30, a positioning block 1 31, a sample bottle clamp 32, a guide rail 1 33, a sample bottle baffle 34, a sampling bottle 35, a support plate 36, a positioning block 2 37, a quick-connect connector 2 38, a switch valve 2 39, a switch handle assembly 40, a guide rail 2 41, a servo electric cylinder 3 42, a servo electric cylinder 4 43, a servo electric cylinder 5 44 and other components.

[0056] The servo electric cylinder 1 28 and the servo electric cylinder 3 42 are fixed in the box body 2, and the quick-connect connector 1 30 is connected to the telescopic end of the servo electric cylinder 1 28. When the servo electric cylinder 1 28 is extended, the quick-connect connector 1 30 can be plugged into the switch valve 1 29; the quick-connect connector 2 38 is connected to the telescopic end of the servo electric cylinder 3 42. When the servo electric cylinder 3 42 is extended, the quick-connect connector 2 38 can be plugged into the switch valve 3.

[0057] The support plate 36 is arranged at the lower part of the box body 2, and the bottom of the support plate 36 is connected to the inner wall of the box body 2 through the guide rail 1 33; a sample bottle access opening 45 is arranged on the front side wall of the box body 2, and the front end of the support plate 36 can extend out of the box body 2 from the sample bottle access opening 45, so as to fix the sampling bottle 35 on the support plate 36; a servo electric cylinder 27 is fixed in the box body 2, and the telescopic end of the servo electric cylinder 27 is connected to the support plate 36 to control the movement of the support plate 36. The servo electric cylinder 27 can control the front end of the support plate 36 to extend out of the box body 2 or retract into the box body 2.

[0058] A servo electric cylinder 5 44 is fixed on the rear side of the support plate 36, and the telescopic end of the servo electric cylinder 5 44 is connected to the sample bottle clamp 32. A sample bottle baffle 34 is fixed on the front edge of the support plate 36. When the sampling bottle 35 is placed on the front end of the support plate 36, the sample bottle clamp 32 can cooperate with the sample bottle baffle 34 to clamp the sampling bottle 35, otherwise the sampling bottle 35 on the support plate 36 can be removed.

[0059] The switch valve adopts a needle valve. When the handle of the needle valve is lifted upward, the needle valve can be opened. On the contrary, when the handle of the needle valve is lowered and automatically reset, the needle valve can be closed. A stand is provided in the box 2, and a servo electric cylinder 43 is fixed on the stand. The telescopic end of the servo electric cylinder 43 is connected to a switch handle assembly 40. The switch handle assembly 40 is provided with a U-shaped fork corresponding to the switch valve; the U-shaped fork can be inserted into the handle of the switch valve; when the servo electric cylinder 43 is extended and retracted, the U-shaped fork can lift or lower the handle of the switch valve to realize the switch of the switch valve.

[0060] Example 3

[0061] like Figures 1 to 7 As shown, based on the structures of Example 1 and Example 2, the gas sampling device includes the following process stages when in use: preparation stage, cooling stage, replacement stage, sampling stage, purging stage, sampling completion, and final completion. The indicator light 3 and the display screen 1 can change to different states at different stages, thereby realizing the indication of different process stages.

[0062] Preparation stage: place the sampling bottle 35 on the support plate 36, and place the switch valve 1 29 and the switch valve 2 39 of the sampling bottle 35 on the positioning block 1 31 and the positioning block 2 37 respectively; the PLC controller controls the servo electric cylinder 5 44 to make the sample bottle clamp 32 press against the sampling bottle 35; then, the PLC controller controls the servo electric cylinder 2 27 to retract the support plate 36 to the sample bottle access port 45 and place it at the sampling station; then, the PLC controller controls the servo electric cylinder 1 28 and the servo electric cylinder 3 42 to make the quick-connect connector 1 30 and the quick-connect connector 2 38 be plugged into the switch valve 1 29 and the switch valve 2 39.

[0063] Cooling stage: Circulating water is used to cool the gas in pipeline 18. The circulating water enters pipeline 8 25, and the PLC controller controls the electric ball valve 3 to open. The circulating water flows through pipeline 8 25, the coil in the cooling tank 10, pipeline 9 26, and then flows out of the box 2.

[0064] Replacement stage: the medium to be sampled is connected to pipeline 18, and the PLC controller controls the linkage ball valve 17 to connect pipeline 1 18 with pipeline 2 19, so that the medium to be sampled passes through the electric ball valve 2 9, flow regulating valve 8, cooling tank 10, and temperature sensor on pipeline 1 18 in sequence, and then flows into pipeline 2 19 through the linkage ball valve 17, and is discharged through pipeline 2 19; thereby, the medium to be sampled is used to replace impurities such as air in the pipeline system.

[0065] Sampling stage: PLC controller controls the multifunctional linkage ball valve 17 to connect pipeline 1 18 with pipeline 3 20, pipeline 4 21 with pipeline 5 22, and servo electric cylinder 4 43 opens switch valve 1 29 and switch valve 2 39 through switch handle assembly 40, so that the medium to be sampled can flow through pipeline 1 18, pipeline 3 20, sampling bottle 35, pipeline 4 21, and pipeline 5 22 in sequence, so that part of the medium is retained in the sampling bottle 35, thereby completing the medium sampling.

[0066] Purging stage: After the medium sampling is completed, the PLC controller controls the servo electric cylinder 43 to move the switch handle assembly 40 downward to close the switch valve 1 29 and the switch valve 2 39; then, the PLC controller opens the purge pipeline 6 23 and the linkage ball valve 17, so that the pipeline 2 19 is connected with the pipeline 3 20, and the pipeline 4 21 is connected with the pipeline 6 23, so that the nitrogen used for purging can purge the entire pipeline system; the nitrogen purge path is: pipeline 6 23, pipeline 4 21, pipeline 7 24, pipeline 3 20, pipeline 2 19. Nitrogen can purge the medium of the pipeline system, thereby preventing the residual medium from corroding or rusting the pipeline system.

[0067] Sampling is completed: After the nitrogen purge is completed, the PLC controller closes the pipeline six 23, and controls the servo electric cylinder one 28 and the servo electric cylinder two 27 to pull out the quick-connect connector one 30 and the quick-connect connector two 38.

[0068] Final completion: the PLC controller controls the servo electric cylinder five 44 to push the support plate 36 out of the box body 2; then, the PLC controller controls the servo electric cylinder four 43 to retract the sample bottle clamp 32 to release the sampling bottle 35, making it easier for the operator to take out or replace the sampling bottle 35.

[0069] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A fully automatic closed gas sampling device, characterized in that: It comprises a box body (2) and a pipeline system and a sampling bottle (35) arranged in the box body (2); A sampling station for placing a sampling bottle (35) is provided in the box (2); switch valves are provided at both ends of the sampling bottle (35), namely switch valve 1 (29) and switch valve 2 (39); two quick-connect connectors are provided at the sampling station, namely quick-connect connector 1 (30) and quick-connect connector 2 (38); the two quick-connect connectors are movable, so that quick-connect connector 1 (30) can be plugged into or unplugged from switch valve 1 (29), and quick-connect connector 2 (38) can be plugged into or unplugged from switch valve 2 (39); The pipeline system comprises a linkage ball valve (17), the linkage ball valve (17) is connected to pipeline one (18), pipeline two (19), pipeline three (20), pipeline four (21), and pipeline five (22) respectively, and the linkage ball valve (17) can control pipeline three (20) to be connected to pipeline one (18) or pipeline two (19), or control pipeline four (21) to be connected to pipeline two (19) or pipeline five (22); pipeline one (18) and pipeline five (22) are respectively connected to the upstream and downstream of the source to be sampled, pipeline two (19) is used to connect to the waste discharge pipeline, pipeline three (20) is connected to quick connector one (30), and pipeline four (21) is connected to quick connector two (38); pipeline six (23) is connected to pipeline four (21) and is used to connect to the purge gas source; pipeline seven (24) is connected between pipeline three (20) and pipeline four (21); A PLC controller is also provided in the box body (2), and the PLC controller is used to control the reversing action of the linkage ball valve (17), the switching action of the valve on the pipeline, and the plugging and unplugging action of the quick-connect connector and the switch valve.

2. The fully automatic closed gas sampling device according to claim 1 is characterized in that: The pipeline six (23) is serially connected with an electric ball valve one (4), a one-way valve one (5) and a pressure regulating valve (6).

3. The fully automatic closed gas sampling device according to claim 1 is characterized in that: A flow regulating valve (8), an electric ball valve (9) and a cooling tank (10) are connected in series on the first pipeline (18).

4. The fully automatic closed gas sampling device according to claim 3 is characterized in that: A cooling coil is arranged in the cooling tank (10), and the two ends of the cooling coil are connected to pipeline eight (25) and pipeline nine (26) respectively. An electric ball valve two (9) is connected in series to pipeline eight (25), and a manual ball valve one (12) is connected in series to pipeline nine (26).

5. The fully automatic closed gas sampling device according to claim 1 is characterized in that: One-way valve No. 2 (7) is connected in series to pipeline No. 5 (22), one-way valve No. 3 (13) is connected in series to pipeline No. 2 (19), and one-way valve No. 4 (16) is connected in series to pipeline No. 7 (24).

6. The fully automatic closed gas sampling device according to any one of claims 1 to 5, characterized in that: A servo electric cylinder 1 (28) and a servo electric cylinder 3 (42) are fixed in the box body (2); a quick-connect connector 1 (30) is connected to the telescopic end of the servo electric cylinder 1 (28); when the servo electric cylinder 1 (28) is extended, the quick-connect connector 1 (30) can be plugged into the switch valve 1 (29); a quick-connect connector 2 (38) is connected to the telescopic end of the servo electric cylinder 3 (42); when the servo electric cylinder 3 (42) is extended, the quick-connect connector 2 (38) can be plugged into the switch valve 3.

7. The fully automatic closed gas sampling device according to claim 6 is characterized in that: A support plate (36) is arranged in the box body (2), and the bottom of the support plate (36) is connected to the inner wall of the box body (2) through a guide rail (33); a sample bottle taking-in and putting-out opening (45) is arranged on the front side wall of the box body (2), and the front end of the support plate (36) can extend out of the box body (2) from the sample bottle taking-in and putting-out opening (45) so as to fix the sampling bottle (35) on the support plate (36); a servo electric cylinder (27) is fixed in the box body (2), and the telescopic end of the servo electric cylinder (27) is connected to the support plate (36) so as to control the movement of the support plate (36).

8. The fully automatic closed gas sampling device according to claim 7 is characterized in that: A servo electric cylinder five (44) is fixed on the rear side of the support plate (36), and a sample bottle clamping block (32) is connected to the telescopic end of the servo electric cylinder five (44). A sample bottle baffle (34) is fixed on the front side of the support plate (36), and the sample bottle clamping block (32) can cooperate with the sample bottle baffle (34) to clamp the sampling bottle (35).

9. The fully automatic closed gas sampling device according to claim 8, characterized in that: The switch valve adopts a needle valve; a stand is arranged in the box body (2), a servo electric cylinder four (43) is fixed on the stand, the telescopic end of the servo electric cylinder four (43) is connected to a switch handle assembly (40), and a U-shaped fork corresponding to the switch valve is arranged on the switch handle assembly (40); the U-shaped fork can be inserted into the handle of the switch valve; when the servo electric cylinder four (43) is telescopic, the U-shaped fork can lift or lower the handle of the switch valve to realize the switch of the switch valve.

10. The fully automatic closed gas sampling device according to claim 9, characterized in that: When the gas sampling device is used, it includes the following process stages: Preparation stage: placing the sampling bottle (35) on the support plate (36), placing the switch valve 1 (29) and the switch valve 2 (39) of the sampling bottle (35) on the positioning block 1 (31) and the positioning block 2 (37) respectively; the PLC controller controls the servo electric cylinder 5 (44) to make the sample bottle clamping block (32) press against the sampling bottle (35); then, the PLC controller controls the servo electric cylinder 2 (27) to retract the support plate (36) to the sample bottle taking and placing port (45) and place it at the sampling station; then, the PLC controller controls the servo electric cylinder 1 (28) and the servo electric cylinder 3 (42) to make the quick connector 1 (30) and the quick connector 2 (38) plug into the switch valve 1 (29) and the switch valve 2 (39); Cooling stage: The gas in pipeline 1 (18) is cooled using circulating water.

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