Safe full-automatic closed circulating sampling system

Abstract

The utility model discloses a safe full-automatic closed circulating sampling system which comprises a material circulating pipe, a feeding valve, a quantifying bottle and a discharging valve are sequentially mounted on the material circulating pipe, a first three-way pipe is arranged between the quantifying bottle and the feeding valve, and one end of the first three-way pipe is connected with a sampling box through a material sampling pipe; two second three-way pipes are arranged between the quantitative bottle and the discharge valve and are respectively connected with a gas-phase balance pipe and a purging pipe, and the gas-phase balance pipe is connected with the sampling box. According to the liquid sampling device disclosed by the utility model, toxic, harmful and volatile liquid is effectively prevented from hurting a human body when a sampling person samples a liquid sample, so that the safety of the sampling person is effectively ensured; meanwhile, pollution to the surrounding sampling environment is effectively avoided, and the intrinsic safety level of an enterprise is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of closed-circulation sampling, in particular to a safe full-automatic closed-circulation sampling system. Background Art

[0002] In the analysis projects of the chemical industry, some toxic, harmful and volatile liquids are often sampled and analyzed, such as methanol, sulfuric acid, anhydrous hydrogen fluoride, etc.; these liquids are volatile or toxic and harmful at room temperature, and the traditional sampling method is mostly to place the sampling bottle directly under the sampling port for sampling and expose it to the air. This sampling method will not only cause a large amount of toxic and harmful gases to evaporate and cause human harm to the samplers, but also cause great pollution to the surrounding environment. At the same time, during the sampling process, the sample liquid is also easy to splash onto the samplers' bodies, causing burns or corrosion to the samplers' skin. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a safe, fully automatic, closed-loop sampling system, which enables samplers to effectively avoid personal injury caused by toxic, harmful and volatile liquids during the liquid sample sampling process, and effectively ensure the safety of samplers; at the same time, it effectively avoids pollution to the surrounding sampling environment, and effectively improves the inherent safety level of the enterprise.

[0004] In order to solve the above technical problems, the utility model provides a safe, fully automatic closed-loop sampling system, including a material circulation pipe, on which a feed valve, a quantitative bottle and a discharge valve are installed in sequence, a first three-way pipe is arranged between the quantitative bottle and the feed valve, and one end of the first three-way pipe is connected to a sampling box through a material sampling pipe; two second three-way pipes are arranged between the quantitative bottle and the discharge valve, which are respectively connected to a gas phase balance pipe and a purge pipe, and the gas phase balance pipe is connected to the sampling box.

[0005] Furthermore, a purge valve is provided on the purge pipe, and the purge pipe is connected to an external gas source.

[0006] Furthermore, a sampling valve is provided on the material sampling tube, and a gas phase balancing valve is provided on the gas phase balancing tube.

[0007] Furthermore, a third three-way pipe is provided between the cylinder balance pipe and the sampling box, and the other end of the third three-way pipe is connected to an alkaline washing box.

[0008] Furthermore, a negative pressure device is provided on the alkali washing box.

[0009] Furthermore, a horizontal oscillator is provided at the bottom of the sampling box.

[0010] Furthermore, it comprises a solenoid valve group control box for controlling valve components in the system, and a PLC solenoid valve group control unit is arranged in the solenoid valve group control box.

[0011] Furthermore, the feed valve, discharge valve, purge valve, sampling valve and gas phase balance valve are all pneumatic valves.

[0012] The beneficial effects of the utility model are as follows: the device can effectively prevent workers from being harmed by toxic, harmful and volatile liquids during the process of sampling liquid samples, effectively ensuring the safety of the samplers; at the same time, it can effectively avoid the pollution to the surrounding sampling environment; and it can also realize quantitative sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Explanation of the numbers in the figure: 1. Material circulation pipe; 2. Material sampling pipe; 3. Gas phase balance pipe; 4. Purge pipe; 5. Alkaline cleaning box; 6. Solenoid valve group control box; 7. Feed valve; 8. Quantitative bottle; 9. Discharge valve; 10. Sampling valve; 11. Sampling box; 12. Gas phase balance valve; 13. Purge valve; 14. Horizontal oscillator. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] Reference Figure 1 As shown, an embodiment of a safe fully automatic closed-loop sampling system of the utility model comprises a material circulation pipe 1, on which a feed valve 7, a quantitative bottle 8 and a discharge valve 9 are sequentially installed, a first three-way pipe is arranged between the quantitative bottle 8 and the feed valve 7, one end of the first three-way pipe is connected to a sampling box 11 through a material sampling pipe 2; two second three-way pipes are arranged between the quantitative bottle 8 and the discharge valve 9, which are respectively connected to a gas phase balance pipe 3 and a purge pipe 4, and the gas phase balance pipe 3 is connected to the sampling box 11.

[0022] A purge valve 13 is provided on the purge pipe 4, and the purge pipe 4 is connected to an external gas source; a sampling valve 10 is provided on the material sampling pipe 2, and a gas phase balance valve 12 is provided on the gas phase balance pipe 3; a third three-way pipe is provided between the cylinder balance pipe and the sampling box 11, and the other end of the third three-way pipe is connected to the alkali washing box 5; a negative pressure device is provided on the alkali washing box 5; a horizontal oscillator 14 is provided at the bottom of the sampling box 11; it includes a solenoid valve group control box 6, which is used to control the valve components in the system, and a PLC solenoid valve group control unit is provided in the solenoid valve group control box 6; the feed valve 7, the discharge valve 9, the purge valve 13, the sampling valve 10 and the gas phase balance valve 12 are all pneumatic valves.

[0023] The sampling bottle is placed on the horizontal oscillator 14 in the sampling box 11 in advance, and the sampling mode is selected on the solenoid valve group control box 6. The execution program will open the feed valve 7 and the discharge valve 9 in sequence to replace the material circulation pipe 1. After the replacement is completed, the feed valve 7 and the discharge valve 9 are closed in sequence. At this time, the quantitative bottle 8 is full of the required sampling sample, and then the horizontal oscillator 14 is started, the sampling valve 10 is opened, and the gas phase balance valve 12 is opened with a delay. The sample in the quantitative bottle 8 flows to the sampling bottle in the sampling box 11 by its own gravity, and then the purge valve 13 is opened, and the protective gas is introduced to purge the entire pipeline system. Finally, the sampling valve 10, the purge valve 13 and the gas phase balance valve 12 are closed in sequence, the horizontal oscillator 14 is stopped, the sampling bottle is taken out, and the bottle cap is tightly covered.

[0024] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A safe fully automatic closed loop sampling system, characterized in that: The invention comprises a material circulation pipe (1), on which a feed valve (7), a quantitative bottle (8) and a discharge valve (9) are sequentially installed, a first three-way pipe is arranged between the quantitative bottle (8) and the feed valve (7), and one end of the first three-way pipe is connected to a sampling box (11) via a material sampling pipe (2); Two second three-way pipes are arranged between the quantitative bottle (8) and the discharge valve (9), and are respectively connected to a gas phase balance pipe (3) and a purge pipe (4), and the gas phase balance pipe (3) is connected to the sampling box (11).

2. The safe fully automatic closed loop sampling system according to claim 1, characterized in that: The purge pipe (4) is provided with a purge valve (13), and the purge pipe (4) is connected to an external gas source.

3. The safe fully automatic closed loop sampling system according to claim 1, characterized in that: The material sampling tube (2) is provided with a sampling valve (10), and the gas phase balancing tube (3) is provided with a gas phase balancing valve (12).

4. The safe fully automatic closed loop sampling system according to claim 1, characterized in that: A third three-way pipe is provided between the gas phase balance pipe and the sampling box (11), and the other end of the third three-way pipe is connected to the alkaline washing box (5).

5. The safe fully automatic closed loop sampling system as claimed in claim 4, characterized in that: The alkali washing box (5) is provided with a negative pressure device.

6. The safe fully automatic closed loop sampling system according to claim 1, characterized in that: A horizontal oscillator (14) is arranged at the bottom of the sampling box (11).

7. The safe fully automatic closed loop sampling system according to claim 1, characterized in that: It comprises an electromagnetic valve group control box (6) for controlling valve components in the system, wherein a PLC electromagnetic valve group control unit is arranged in the electromagnetic valve group control box (6).

8. The safe fully automatic closed cycle sampling system according to claim 2 or 3, characterized in that: The feed valve (7), the discharge valve (9), the purge valve (13), the sampling valve (10) and the gas phase balance valve (12) are all pneumatic valves.

Images