Explosion-proof automatic water quality sampling device

Abstract

An explosion-proof type automatic water quality sampling device relates to the technical field of water quality sampling equipment and comprises a control unit, a sampling unit, a sample reserving unit and an air refrigerator, the control unit comprises an explosion-proof box and a power supply and a control panel in the explosion-proof box, and the sampling unit sequentially comprises a compressed air source, an explosion-proof electromagnetic valve, a pneumatic motor and a peristaltic pump. The compressed air source, the explosion-proof electromagnetic valve and the pneumatic motor are connected through air pipes, the pneumatic motor and the peristaltic pump are connected through a coupler, the control panel controls a passage of the explosion-proof electromagnetic valve, the sample reserving unit comprises a refrigerating box and a sample reserving bottle in the refrigerating box, and the peristaltic pump is connected with a water source and the sample reserving bottle through water pipes. And the air refrigerator is respectively connected with the explosion-proof electromagnetic valve and the refrigerating box through air pipes. All devices in the sampling and refrigerating process are driven by compressed air instead of electric power, the whole machine has an anti-explosion function, is suitable for water quality sampling in dangerous scenes, and fills the technical blank of safety requirements of water quality sampling in high-risk environments.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality sampling equipment, and in particular to an explosion-proof automatic water quality sampling device. Background Technology

[0002] Traditional water samplers use motor-driven peristaltic pumps or ordinary solenoid valves, which are prone to explosion due to electrical sparks in flammable and explosive environments. Compressor-type refrigeration systems require electrical components for cooling, which does not meet explosion-proof requirements. In addition, conventional control boxes / cabinets have poor self-heating performance, and the internal electronic components generate heat, causing temperatures to exceed limits. Prolonged high temperatures affect the stability of the control board, posing safety hazards and shortening its service life. Therefore, currently, no fully electrified automatic water sampler has been found that can achieve a complete sampling-refrigeration process, failing to meet the safety requirements for water sampling in high-risk environments. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the prior art and provide an explosion-proof automatic water quality sampling device. All components in the sampling and cooling process are driven by compressed air, not electricity. The entire device is explosion-proof and suitable for water quality sampling in hazardous scenarios, filling the technological gap in the safety requirements of water quality sampling in high-risk environments.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An explosion-proof automatic water quality sampling device includes a control unit, a sampling unit, a sample retention unit, and an air cooler. The control unit includes an explosion-proof enclosure and a power supply and control board inside. The sampling unit includes, in sequence, a compressed air source, an explosion-proof solenoid valve, a pneumatic motor, and a peristaltic pump. The compressed air source, the explosion-proof solenoid valve, and the pneumatic motor are connected by air pipes. The pneumatic motor and the peristaltic pump are connected by a coupling. The control board controls the passage of the explosion-proof solenoid valve. The sample retention unit includes a refrigerator and a sample retention bottle inside. The peristaltic pump is connected to the water source and the sample retention bottle through water pipes. The air cooler is connected to the explosion-proof solenoid valve and the refrigerator through air pipes. The power supply and control board are enclosed in an explosion-proof enclosure. The power supply provides power to the control unit, and the control board controls the flow of the explosion-proof solenoid valve via commands. Compressed air from the compressed air source enters the explosion-proof solenoid valve through the inlet. One outlet of compressed air is fed into a pneumatic motor, which drives a peristaltic pump via a coupling. Water from the water source enters the sample bottle under the drive of the peristaltic pump. After quantitative sampling is completed, the control board sends a command to adjust the flow of the explosion-proof solenoid valve, closing the flow to the pneumatic motor and stopping sampling. The other outlet of compressed air is fed into an air cooler, and the resulting cold air is fed into a refrigerator for cooling.

[0006] Preferably, the control unit also includes a temperature controller located inside the explosion-proof enclosure for controlling the temperature inside the refrigerator, and the refrigerator is equipped with a temperature sensor.

[0007] Preferably, the explosion-proof enclosure is made of stainless steel or aluminum alloy. The enclosure is constructed from high-strength materials (stainless steel, aluminum alloy, etc.), and the enclosure joint surfaces employ labyrinth-type sealing grooves with embedded fluororubber sealing rings (temperature resistant -40℃~200℃). This allows it to withstand internal explosion pressure and prevent the flame from spreading outwards. The explosion-proof gap design complies with explosion-proof standards (such as GB3836.1-2000) to prevent external explosive gases from entering the interior.

[0008] Preferably, the explosion-proof enclosure is equipped with aluminum heat sink fins on its outer rear side and a semiconductor cooling chip inside. This heat dissipation design prevents the electronic components inside the enclosure from overheating and causing the cavity temperature to exceed the limit, avoiding long-term high temperatures from affecting the stability of the control board, and improving safety and service life.

[0009] Preferably, the compressed air source is an explosion-proof air compressor.

[0010] Preferably, the air cooler is a vortex tube cooler. The vortex tube separates compressed air into two streams, one cold and one hot, with the cold stream flowing into the refrigerator through a pipe.

[0011] Preferably, the air pipe from the air cooler to the refrigerator is a copper pipe, the refrigerator and the copper pipe on the outside of the refrigerator are provided with a heat insulation layer, and the copper pipe on the inside of the refrigerator is a spiral coil to distribute the cold air evenly.

[0012] Preferably, the heat insulation layer of the refrigerator box adopts a structure of polyurethane foam + vacuum insulation board (thermal conductivity ≤0.0035W / m·K).

[0013] Preferably, when sampling via a pressure pipe, a pneumatic ball valve is installed on the water pipe connecting the peristaltic pump and the water source. The explosion-proof solenoid valve and the pneumatic ball valve are connected via an air pipe. When not sampling, the pneumatic ball valve is in the closed state. When sampling is required, the control board issues a command to open the explosion-proof solenoid valve passage, allowing compressed air to enter the pneumatic ball valve, which then opens to begin sampling.

[0014] The beneficial effects of this utility model are as follows: all components in the sampling and cooling process of this utility model are driven by compressed air instead of electricity, the whole machine has explosion-proof function, it is suitable for water quality sampling in dangerous scenarios, and fills the technical gap in the safety requirements of water quality sampling in high-risk environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0017] Explanation of key component symbols in the diagram: 10. Control unit; 11. Explosion-proof box; 12. Power supply; 13. Control board; 14. Temperature controller;

[0018] Sampling unit; 21. Compressed air source; 22. Explosion-proof solenoid valve; 23. Pneumatic motor; 24. Peristaltic pump; 25. Pneumatic ball valve;

[0019] 30. Sample retention unit; 31. Refrigerated box; 32. Sample retention bottle;

[0020] 40. Air cooler;

[0021] 101. Trachea;

[0022] 102. Coupling;

[0023] 103. Water pipe. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] Example 1: As Figure 1 As shown, an explosion-proof automatic water quality sampling device includes a control unit 10, a sampling unit, a sample retention unit 30, and an air cooler 40.

[0026] The control unit 10 includes an explosion-proof enclosure 11 and a power supply 12 and a control board 13 within it. The sampling unit sequentially includes a compressed air source 21, an explosion-proof solenoid valve 22, a pneumatic motor 23, and a peristaltic pump 24. The compressed air source 21, the explosion-proof solenoid valve 22, and the pneumatic motor 23 are connected via an air pipe 101. The pneumatic motor 23 and the peristaltic pump 24 are connected via a coupling 102. The control board 13 controls the flow of the explosion-proof solenoid valve 22. The sample retention unit 30 includes a refrigerator 31 and sample bottles 32 within it. The peristaltic pump 24 is connected to a water source and the sample bottles 32 via water pipes 103. The air cooler 40 is connected to the explosion-proof solenoid valve 22 and the refrigerator 31 via air pipes 101.

[0027] In addition, the control unit 10 also includes a temperature controller 14 located inside the explosion-proof enclosure 11.

[0028] This embodiment is suitable for sampling from a non-pressurized water source. The process is as follows: Control board 13 controls the passage of explosion-proof solenoid valve 22 via commands. Compressed air generated by compressed air source 21 enters explosion-proof solenoid valve 22 through the inlet. One outlet of compressed air is fed into pneumatic motor 23, driving pneumatic motor 23, which in turn drives peristaltic pump 24 through coupling 102. Water from the water source enters the sample bottle 32 under the drive of peristaltic pump 24. After quantitative sampling is completed, control board 13 issues commands to control explosion-proof solenoid valve 22 to adjust the passage, closing the passage to pneumatic motor 23 and stopping sampling. The other outlet of compressed air is fed into air cooler 40, and the generated cold air is fed into refrigerator 31 for cooling.

[0029] Example 2: Based on Example 1, the explosion-proof box 11 is made of stainless steel or aluminum alloy. The explosion-proof box 11 has aluminum heat dissipation fins on the outer back side and semiconductor cooling chips inside.

[0030] The compressed air source 21 is an explosion-proof air compressor.

[0031] In addition, the air cooler 40 is a vortex tube cooler, and the air pipe 101 of the air cooler 40 leading to the refrigerator 31 is a copper pipe, with the portion of the copper pipe inside the refrigerator 31 configured as a spiral coil.

[0032] Example 3: Combination Figure 2 As shown, based on Embodiment 1 or Embodiment 2, a pneumatic ball valve 25 is provided on the water pipe 103 connecting the peristaltic pump 24 and the water source, and the explosion-proof solenoid valve 22 and the pneumatic ball valve 25 are connected through the air pipe 101.

[0033] This embodiment is suitable for sampling from a pressurized water source. The process is as follows: When not sampling, the pneumatic ball valve 25 is closed. When sampling is required, the control board 13 controls the passage of the explosion-proof solenoid valve 22 via a command. Compressed air generated by the compressed air source 21 enters the explosion-proof solenoid valve 22 through the inlet. One path of compressed air flows into the pneumatic ball valve 25, which opens to allow water to enter. The compressed air from the second outlet flows into the pneumatic motor 23, driving the motor and, through the coupling 102, the peristaltic pump 24. Through the quantitative sampling by the peristaltic pump 24, water enters the sample bottle 32. After quantitative sampling is completed, the control board 13 issues a command to control the explosion-proof solenoid valve 22 to adjust its passage, closing the passage to the pneumatic ball valve 25 and the pneumatic motor 23, thus stopping sampling. The compressed air from the third outlet flows into the air cooler 40, and the generated cold air flows into the refrigerator 31 for cooling.

[0034] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. The present utility model can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. An explosion-proof automatic water quality sampling device, characterized in that: It includes a control unit (10), a sampling unit, a sample retention unit (30), and an air cooler (40). The control unit (10) includes an explosion-proof box (11) and a power supply (12) and a control board (13) inside it. The sampling unit includes, in sequence, a compressed air source (21), an explosion-proof solenoid valve (22), a pneumatic motor (23), and a peristaltic pump (24). The compressed air source (21), the explosion-proof solenoid valve (22), and the pneumatic motor (23) are connected by an air pipe (101). The pneumatic motor (23) and the peristaltic pump (24) are connected by a coupling (102). The control board (13) controls the passage of the explosion-proof solenoid valve (22). The sample retention unit (30) includes a refrigerator (31) and a sample retention bottle (32) inside it. The peristaltic pump (24) is connected to the water source and the sample retention bottle (32) through a water pipe (103). The air cooler (40) is connected to the explosion-proof solenoid valve (22) and the refrigerator (31) via air pipes (101).

2. The explosion-proof automatic water quality sampling device according to claim 1, characterized in that: The control unit (10) also includes a temperature controller (14) located inside the explosion-proof enclosure (11).

3. The explosion-proof automatic water quality sampling device according to claim 1, characterized in that: The explosion-proof box (11) is made of stainless steel or aluminum alloy.

4. The explosion-proof automatic water quality sampling device according to claim 3, characterized in that: The explosion-proof box (11) has aluminum heat dissipation fins on the outer back side and a semiconductor cooling chip inside.

5. The explosion-proof automatic water quality sampling device according to claim 1, characterized in that: The compressed air source (21) is an explosion-proof air compressor.

6. The explosion-proof automatic water quality sampling device according to claim 1, characterized in that: The air cooler (40) is a vortex tube cooler.

7. The explosion-proof automatic water quality sampling device according to claim 6, characterized in that: The air pipe (101) from the air cooler (40) to the refrigerator (31) is a copper pipe.

8. An explosion-proof automatic water quality sampling device according to any one of claims 1-7, characterized in that: The peristaltic pump (24) is connected to the water pipe (103) of the water source by a pneumatic ball valve (25), and the explosion-proof solenoid valve (22) and the pneumatic ball valve (25) are connected by an air pipe (101).

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