Intrinsic safety type high-toxicity gas sampling device

Abstract

The utility model relates to the technical field of sampling, and discloses an intrinsic safety type high-toxicity gas sampling device which comprises a storage bin and a sampling cavity, a vacuum control valve is arranged on the outer wall of the sampling cavity, a needle hole is formed in the outer wall of the front side of the sampling cavity, and a medium input pipe and a medium output pipe are arranged in the sampling cavity. The medium input pipe is located on the upper side of the medium output pipe, a first medium control valve is arranged on the outer wall of the medium input pipe, a second medium control valve is arranged on the outer wall of the medium output pipe, and nitrogen input pipes are fixedly connected to the outer wall of the medium input pipe and the outer wall of the medium output pipe. According to the utility model, the vacuum control valve is opened, so that a negative pressure area is formed in the sampling cavity, then the injection sampling needle is inserted for sampling, the nitrogen control valve I and the nitrogen control valve II are opened, and samples at the medium inlet and the medium outlet are isolated by nitrogen, so that the samples are effectively prevented from leaking from the sampler to cause poisoning during maintenance, and the safety of maintenance personnel is protected.

Description

Technical Field

[0001] This utility model relates to the field of sampling technology, and in particular to an intrinsically safe sampling device for highly toxic gases. Background Technology

[0002] In industries such as petrochemicals and power generation, in order to ensure the safety of the production process and the quality of products, it is necessary to extract samples from each stage of the process equipment, conduct quantitative and qualitative tests and analyses, determine whether the materials at a certain time and stage meet the process requirements and are qualified, and keep track of whether the production process is good.

[0003] Sampling liquid and gas phases at normal temperature and pressure is relatively simple. However, it becomes extremely complicated with special media, especially highly toxic ones. Sampling with these media poses significant safety risks, requiring the use of gas masks and respirators, making the process cumbersome and fraught with danger. Operators are often reluctant to go to the sampling sites for highly toxic substances, causing considerable inconvenience to production analysis.

[0004] For this type of medium, some improved sampling devices have been developed, such as using gas cylinders for sampling and adding nitrogen purging sampling systems. However, these devices still pose some safety risks in practical applications and cannot effectively mitigate the hazards when sampling high-altitude media. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an intrinsically safe sampling device for highly toxic gases, which aims to improve the problem that sampling devices cannot effectively avoid harming personnel's health when sampling highly toxic media.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An intrinsically safe high-toxicity gas sampling device includes a storage chamber and a sampling chamber. The outer wall of the sampling chamber is equipped with a vacuum control valve, and the front outer wall of the sampling chamber is equipped with a pinhole. The sampling chamber is equipped with a medium input pipe and a medium output pipe. The medium input pipe is located above the medium output pipe. The outer wall of the medium input pipe is equipped with a medium control valve one, and the outer wall of the medium output pipe is equipped with a medium control valve two. Nitrogen input pipes are fixedly connected to the outer walls of both the medium input pipe and the medium output pipe. The outer wall of the nitrogen input pipe is equipped with nitrogen control valve one and nitrogen control valve two.

[0008] Preferably, a connecting rod is fixedly connected to the outer wall of the storage chamber, and the outer wall of the connecting rod is fixedly connected to the outer wall of the medium input pipe and the medium output pipe.

[0009] Preferably, the upper surface of the medium input pipe is provided with a medium inlet.

[0010] Preferably, the lower surface of the medium output pipe is provided with a medium outlet.

[0011] Preferably, a nitrogen inlet is provided on the lower surface of the nitrogen input pipe.

[0012] Preferably, the rear outer wall of the sampling cavity is provided with an air vent.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the vacuum control valve is opened to form a negative pressure zone in the sampling chamber. Then, the injection sampling needle is inserted to perform sampling. Nitrogen control valve one and nitrogen control valve two are opened to isolate the sample at the inlet and outlet of the medium with nitrogen, which effectively prevents the sample from leaking from the sampler during maintenance, thus preventing poisoning and protecting the safety of maintenance personnel. Attached Figure Description

[0015] Figure 1 This is a perspective view of the intrinsically safe high-toxicity gas sampling device proposed in this utility model;

[0016] Figure 2 This is a partial structural diagram of the vacuum control valve of the intrinsically safe high-toxicity gas sampling device proposed in this utility model;

[0017] Figure 3 This is a partial structural diagram of the nitrogen control valve 2 of the intrinsically safe high-toxicity gas sampling device proposed in this utility model.

[0018] Legend:

[0019] 1. Storage chamber; 2. Sampling chamber; 3. Vacuum control valve; 4. Pinhole; 5. Medium input pipe; 6. Medium output pipe; 7. Medium control valve one; 8. Medium control valve two; 9. Nitrogen input pipe; 10. Nitrogen control valve one; 11. Nitrogen control valve two; 12. Connecting rod; 13. Medium inlet; 14. Medium outlet; 15. Nitrogen inlet; 16. Vent. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figure 1 and Figure 2An embodiment of this utility model provides an intrinsically safe high-toxicity gas sampling device, comprising a storage chamber 1 and a sampling chamber 2. A vacuum control valve 3 is provided on the outer wall of the sampling chamber 2, and a pinhole 4 is provided on the front outer wall of the sampling chamber 2. A medium input pipe 5 and a medium output pipe 6 are provided inside the sampling chamber 2. The medium input pipe 5 is located above the medium output pipe 6. A medium control valve 7 is provided on the outer wall of the medium input pipe 5, and a medium control valve 8 is provided on the outer wall of the medium output pipe 6. A nitrogen input pipe 9 is fixedly connected to the outer walls of both the medium input pipe 5 and the medium output pipe 6. A nitrogen control valve 10 and a nitrogen control valve 21 are provided on the outer wall of the nitrogen input pipe 9.

[0022] Specifically, medium control valve 7 controls the opening and closing of medium input pipe 5, medium control valve 8 controls the opening and closing of medium output pipe 6, vacuum control valve 3 is opened to form a negative pressure zone in sampling chamber 2, nitrogen control valve 10 controls nitrogen to enter medium input pipe 5, nitrogen control valve 11 controls nitrogen to enter medium output pipe 6, sampling needle can be inserted into needle hole 4, and storage chamber 1 is responsible for storing hydrogen sulfide.

[0023] Reference Figure 1 A connecting rod 12 is fixedly connected to the outer wall of the storage chamber 1. The outer wall of the connecting rod 12 is fixedly connected to the outer wall of the medium input pipe 5 and the medium output pipe 6.

[0024] Specifically, the connecting rod 12 provides support for the medium input pipe 5 and the medium output pipe 6.

[0025] Reference Figure 1 The upper surface of the medium input pipe 5 is provided with a medium inlet 13; the lower surface of the medium output pipe 6 is provided with a medium outlet 14.

[0026] Specifically, the medium can flow in from the medium inlet 13 and then flow out from the medium outlet 14.

[0027] Reference Figure 1 A nitrogen inlet 15 is provided on the lower surface of the nitrogen input pipe 9.

[0028] Specifically, nitrogen is introduced through nitrogen inlet 15.

[0029] Reference Figure 3 An air vent 16 is provided on the rear outer wall of the sampling chamber 2.

[0030] Specifically, before each sampling, the hydrogen sulfide alarm should be placed at position 16 of the exhaust port on the back of the sampler to check whether the hydrogen sulfide concentration in the adsorbent is saturated. If an alarm is triggered, the adsorbent should be replaced in time.

[0031] Working principle: When using this device, open medium control valve 7 and medium control valve 8 for the first sampling. They do not need to be closed during normal operation, but must be closed during maintenance or in case of an emergency. By opening vacuum control valve 3, a negative pressure zone is created inside sampling chamber 2. Even if the sampling pad is damaged, the medium will not leak out under the protection of negative pressure. After five seconds, insert the injection sampling needle into needle hole 4, open medium control valve 7 and medium control valve 8 to perform sampling. After sampling, remove the injection sampling needle and close medium control valve 7, medium control valve 8, and vacuum control valve 3. If the sampler needs maintenance, open nitrogen control valve 10 and nitrogen control valve 21 to isolate the sample at medium inlet 13 and medium outlet 14 with nitrogen, effectively preventing sample leakage from the sampler during maintenance and thus protecting the safety of maintenance personnel.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intrinsically safe high toxic gas sampling device, comprising a storage bin (1) and a sampling cavity (2), characterized in that: The outer wall of the sampling cavity (2) is provided with a vacuum control valve (3), the front side outer wall of the sampling cavity (2) is provided with a pinhole (4), the inside of the sampling cavity (2) is provided with a medium input pipe (5) and a medium output pipe (6), the medium input pipe (5) is located on the upper side of the medium output pipe (6), the outer wall of the medium input pipe (5) is provided with a medium control valve one (7), the outer wall of the medium output pipe (6) is provided with a medium control valve two (8), the outer walls of the medium input pipe (5) and the medium output pipe (6) are fixedly connected with a nitrogen input pipe (9), and the outer wall of the nitrogen input pipe (9) is provided with a nitrogen control valve one (10) and a nitrogen control valve two (11).

2. The intrinsically safe high toxic gas sampling device according to claim 1, characterized in that: The outer wall of the storage bin (1) is fixedly connected with a connecting rod (12), and the outer wall of the connecting rod (12) is fixedly connected to the outer walls of the medium input pipe (5) and the medium output pipe (6).

3. The intrinsically safe high toxic gas sampling device according to claim 1, characterized in that: The upper surface of the medium input pipe (5) is provided with a medium inlet (13).

4. The intrinsically safe high toxic gas sampling device according to claim 1, characterized in that: The lower surface of the medium output pipe (6) is provided with a medium outlet (14).

5. The intrinsically safe high toxic gas sampling device according to claim 1, characterized in that: The lower surface of the nitrogen input pipe (9) is provided with a nitrogen inlet (15).

6. The intrinsically safe high toxic gas sampling device according to claim 1, characterized in that: The rear side outer wall of the sampling cavity (2) is provided with a vent (16). The outer wall of the storage bin (1) is fixedly connected with a connecting rod (12), and the outer wall of the connecting rod (12) is fixedly connected to the outer walls of the medium input pipe (5) and the medium output pipe (6).

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