System for detecting toxic gas in limited space

Abstract

The utility model relates to the technical field of toxic gas detection, and particularly discloses a system for detecting toxic gas in a limited space, which comprises a stand column, a plurality of groups of sampling mechanisms for sampling air at different heights are arranged in the stand column, and the plurality of groups of sampling mechanisms are vertically arranged; wherein the uppermost sampling mechanism is provided with an electric three-way air valve, the electric three-way air valve is provided with a third connecting pipe and a fourth connecting pipe, the fourth connecting pipe is communicated with the outside, the third connecting pipe is provided with an air extracting pump, the output end of the air extracting pump is provided with a second connecting pipe, and the second connecting pipe is communicated with the air extracting pump. The second connecting pipe is provided with an air detection device, the air detection device is connected with a first connecting pipe, and the first connecting pipe is communicated with the outside; the technical problem that in a limited space, harmful substances in air need to be detected frequently, and the life safety of workers is prevented from being threatened by harmful gas is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of poisonous gas detection, and specifically discloses a poisonous gas detection system in a confined space. Background Art

[0002] In some confined spaces with poor ventilation conditions, due to the small volume of the space and restricted entrances and exits, once toxic gas leaks or accumulates, it is extremely easy to cause serious consequences such as poisoning, suffocation, and even death of operators. In order to ensure the life, health, and safety of the staff, it is necessary to detect the quality of the air in the confined space.

[0003] In some environments with relatively special working natures, harmful gases may be generated during production. In order to prevent the harmful gases from threatening the life safety of the staff, it is necessary to frequently detect the harmful substances in the air and give early warnings to avoid the threat of harmful gases to the life safety of the staff. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a poisonous gas detection system in a confined space to solve the technical problem that in a confined space, it is necessary to frequently detect the harmful substances in the air to avoid the threat of harmful gases to the life safety of the staff.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A poisonous gas detection system in a confined space, including a column, wherein a plurality of sampling mechanisms for sampling air at different heights are arranged in the column, and the plurality of sampling mechanisms are arranged vertically; an electric three-way air valve is arranged on the uppermost sampling mechanism, a third connecting pipe and a fourth connecting pipe are arranged on the electric three-way air valve, the fourth connecting pipe is communicated with the outside, an air pump is arranged on the third connecting pipe, a second connecting pipe is arranged at the output end of the air pump, an air detection device is arranged on the second connecting pipe, and a first connecting pipe is connected to the air detection device and is communicated with the outside. Through the sampling mechanism, the air at different heights in the confined space can be sampled and then moved into the air detection device for air detection.

[0006] Further, the sampling mechanism includes a movable sleeve which is slidably clamped inside the column. A first pipe is provided at the top end of the movable sleeve. The first pipe is clamped inside the column and penetrates through the movable sleeve. A number of connecting grooves are formed on the movable sleeve. A number of second pipes are clamped inside the column. The number of second pipes are respectively aligned with the number of connecting grooves. The second pipes are in contact with and perpendicular to the movable sleeve. The number of sampling mechanisms can be independently controlled to prevent the mixing of air at different heights in a confined space, which may lead to inaccurate detection results and prevent the warning device from accurately alerting the staff.

[0007] Further, the first pipe of the sampling mechanism located below penetrates through the bottom end of the movable sleeve of the sampling mechanism located above. The number of first pipes and the number of movable sleeves cross and communicate with each other. Two adjacent first pipes located within the same movable sleeve do not contact each other. By connecting the number of sampling mechanisms, the samples taken by the sampling mechanisms at any height can be moved into the air detection device without being affected by the air at other heights, thereby improving the accuracy of the detection results.

[0008] Further, a reset assembly is provided between every two adjacent sampling mechanisms. The reset assembly includes a spring. A fixed platform is provided on the first pipe located below. The spring penetrates through the first pipe. The two ends of the spring are respectively in contact with the fixed platform and the movable sleeve. The reset mechanism is used to reset the sampling mechanism after the sampling is completed, so that the internal space between the corresponding movable sleeve and the second pipe is separated. <##

[0009] Further, a control mechanism is provided inside the column. The control mechanism includes a lifting device. The lifting device includes a movable block. A hydraulic cylinder is provided on the movable block. A clamping block is provided on the hydraulic cylinder. The clamping block can be clamped on the first pipe. The control mechanism is used to control the opening of the sampling mechanism at a specified height so that the air at this height can be sampled. And the control mechanism can only control the opening of one sampling mechanism at the same time, and the detection results of the air at the current height will not be affected by the air at other heights.

[0010] Further, a warning device is provided on the column. The lifting device, the warning device, the electric three-way air valve, the air extraction pump and the air detection device are all connected to electronic components. The air detection device can control the warning device through the electronic components. By connecting the lifting device, the warning device, the electric three-way air valve, the air extraction pump and the air detection device to the electronic components, the purpose of automatically detecting different heights in a confined space is achieved, and at the same time, the staff is warned to prevent the staff from inhaling harmful gases and threatening their life safety.

[0011] Further, a fixed platform is provided on the column, and the air extraction pump is fixedly connected thereto. The fixed platform is used to fix the air extraction pump.

[0012] The working principle and beneficial effects of this solution are as follows:

[0013] During use, the staff moves the movable block to a specified position by controlling the lifting device, then controls the telescopic end of the hydraulic cylinder to extend, driving the clamping block to be clamped on the first pipeline. Then, the lifting device is started again, and the clamping block and the movable sleeve are driven by the movable block to move downward until the movable sleeve communicates with a plurality of second pipelines through a plurality of connecting grooves. At this time, the movable sleeve drives the spring to be compressed. At this time, it is necessary to ensure that the electric three-way air valve is adjusted to the state where the first pipeline is communicated with the third connecting pipe, and then the air extraction pump is started to move the air at a specified height into the air detection device, and the input air is detected by the air detection device.

[0014] After the air detection device finishes the detection, the color of the warning device is controlled according to the detection result. When it is detected that there is no toxic gas in the air, the electronic component controls the warning device to display green. When it is detected that there is toxic gas in the air and the detection height is outside 1.5m - 1.9m, the warning device is yellow; when it is detected that there is toxic gas in the air and the detection height is within 1.5m - 1.9m, the electronic component controls the warning device to be red; when the staff sees that the warning device is yellow or red, they can evacuate the confined space in an orderly manner and need to evacuate the work site in time to prevent the toxic gas from being inhaled by the staff, thereby protecting the lives of the staff.

[0015] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the embodiment;

[0017] Figure 2 is an exploded schematic diagram of the embodiment;

[0018] Figure 3 is Figure 2 an enlarged schematic diagram of part A in

[0019] Figure 4 is a schematic structural diagram of the control mechanism in the embodiment;

[0020] Figure 5Side sectional view of the embodiment.

[0021] The reference numerals in the drawings are as follows: column 1, first pipeline 2, movable sleeve 3, fixed platform 4, first fixing groove 5, second pipeline 6, connecting groove 7, second fixing groove 8, spring 9, electric three-way air valve 10, air extraction pump 11, air detection device 12, connecting pipe 13, warning device 14, lifting device 15, movable block 16, hydraulic cylinder 17, clamping block 18, fixed platform 19, third fixing groove 20, second connecting pipe 21, third connecting pipe 22, fourth connecting pipe 23. Detailed implementation manners

[0022] The following is a further detailed description through specific implementation manners:

[0023] Embodiment

[0024] As Figures 1 to 5 shown, a poisonous gas detection system in a confined space is disclosed, including a column 1. The column 1 is located in the confined space, the bottom end of the column 1 is in contact with the ground, and the top end is in contact with the top of the confined space. A plurality of sampling mechanisms are arranged in the column 1. The plurality of sampling mechanisms are vertically arranged in the column 1 and are located at different heights respectively. The sampling mechanism includes a movable sleeve 3. A third fixing groove 20 is formed in the column 1, and the movable sleeve 3 is slidably clamped in the third fixing groove 20. The top end of the movable sleeve 3 is provided with a first pipeline 2, and the first pipeline 2 is installed in the movable sleeve 3. A second fixing groove 8 is formed in the column 1, and the movable sleeve 3 is clamped in the second fixing groove 8. The second fixing groove 8 is communicated with the third fixing groove 20. A plurality of connecting grooves 7 are formed in the movable sleeve 3, and the plurality of connecting grooves 7 are annularly arranged on the movable sleeve 3. A plurality of second pipelines 6 are arranged on the movable sleeve 3, and the plurality of second pipelines 6 are vertically aligned with the plurality of connecting grooves 7 respectively. A plurality of first fixing grooves 5 are formed in the column 1, and the plurality of first fixing grooves 5 are all communicated with the third fixing groove 20. The plurality of second pipelines 6 are respectively clamped on the plurality of first fixing grooves 5. One end of the second pipeline 6 is communicated with the connecting groove 7, and the other end is communicated with the confined space.

[0025] A reset assembly is arranged between every two adjacent sampling mechanisms. The reset assembly includes a spring 9. The first pipeline 2 on the sampling mechanism located below is installed in the movable sleeve 3 of the sampling mechanism located above. The two adjacent first pipelines 2 do not contact each other, and the interval between the two first pipelines 2 is equal to the diameter of the second pipeline 6. A fixed platform 4 is fixedly connected to the first pipeline 2 located below. The spring 9 is sleeved on the first pipeline 2 located below. One end of the spring 9 contacts the fixed platform 4, and the other end contacts the bottom end of the movable sleeve 3; As Figure 2 and Figure 3 shown.

[0026] A control mechanism is arranged inside the column 1. The control mechanism includes a lifting device 15. The lifting device 15 includes a movable block 16. A hydraulic cylinder 17 is arranged on the movable block 16. The fixed end of the hydraulic cylinder 17 is fixedly connected to the movable block 16 by bolts. A clamping block 18 is arranged on the telescopic end of the hydraulic cylinder 17. An arc-shaped groove is formed in the clamping block 18. The clamping block 18 is clamped on the first pipe 2, and the inner wall of the arc-shaped groove fits with the outer wall of the first pipe 2. The lifting device 15 is a commonly used technical means by those skilled in the art, and its structure, connection method and usage method are all well-known to those skilled in the art. As Figure 4 shown.

[0027] An electric three-way air valve 10 is arranged on the uppermost first pipe 2. One end of the first pipe 2 is connected to the electric three-way air valve 10. The remaining two ends of the electric three-way air valve 10 are respectively connected to a third connecting pipe 22 and a fourth connecting pipe 23. The other end of the fourth connecting pipe 23 is connected to the outside. The other end of the third connecting pipe 22 is connected to an air extraction pump 11. The third connecting pipe 22 is communicated with the input end of the air extraction pump 11. A second connecting pipe 21 is arranged at the output end of the air extraction pump 11. The second connecting pipe 21 is communicated with the air extraction pump 11. A fixed platform 4 is arranged on the column 1. The air extraction pump 11 is fixedly connected to the fixed platform 4 by bolts. An air detection device 12 is arranged at the other end of the second connecting pipe 21. The second connecting pipe 21 is communicated with the input port of the air detection device 12. A first connecting pipe 13 is arranged on the air detection device 12. The other end of the first connecting pipe 13 is communicated with the outside. A plurality of groups of warning devices 14 are arranged on the column 1. Among them, the lifting device 15, the warning device 14, the electric three-way air valve 10, the air extraction pump 11 and the air detection device 12 are all connected to electronic components. Among them, the electronic components, the electric three-way air valve 10, the air extraction pump 11 and the air detection device 12 are all commonly used technical means by those skilled in the art, and their structure, connection method and usage method are all well-known to those skilled in the art. As Figure 1 and Figure 2 shown.

[0028] During specific implementation

[0029] In use, the staff controls the lifting device 15 to start through the electronic component. The lifting device 15 drives the movable block 16 to move, and the movable block 16 drives the hydraulic cylinder 17 to move until the hydraulic cylinder 17 moves to the designated position. At this time, the lifting device 15 stops, and at the same time, the hydraulic cylinder 17 is started. The telescopic end of the hydraulic cylinder 17 extends, and the telescopic end of the hydraulic cylinder 17 drives the clamping block 18 to move until the clamping block 18 moves into the third fixing groove 20. At this time, the clamping block 18 is clamped on the first pipe 2 and is located above the movable sleeve 3. Then the hydraulic cylinder 17 stops, and the lifting device 15 is started again. After driving the movable block 16 to move downward by a specified distance and then stop, the movable block 16 simultaneously drives the movable sleeve 3 to move downward. The movable sleeve 3 slides in the third fixing groove 20 until the movable sleeve 3 is communicated with a plurality of second pipes 6 through a plurality of connecting grooves 7. At the same time, the movable sleeve 3 drives the spring 9 to be compressed. After the lifting device 15 stops, the electronic component controls the electric three-way air valve 10 to be adjusted to the state where the first pipe 2 is communicated with the third connecting pipe 22. Then, the air extraction pump 11 is controlled to start. The air extraction pump 11 sucks the air at a specified height into a plurality of second pipes 6, moves through a plurality of movable sleeves 3 and a plurality of first pipes 2 into the electric three-way air valve 10, sucks the air into the third connecting pipe 22 and the input end of the air extraction pump 11 through the electric three-way air valve 10 and moves into the air extraction pump 11, and moves through the output end of the air extraction pump 11 and the second connecting pipe 21 into the air detection device 12. The air detection device 12 detects the input air, and after the detection is completed, the detected waste gas is discharged to the outside through the first connecting pipe 13.

[0030] After the air detection device 12 finishes the detection, the air detection device 12 sends the detection result to the electronic component in the form of a signal. The electronic component controls the color of the warning device 14 according to the signal. When it is detected that there is no toxic gas in the air, the electronic component controls the warning device 14 to display green. When it is detected that there is toxic gas in the air, the color of the warning device 14 is controlled according to the height of the movable block 16. At the same time, the electronic component controls the hydraulic cylinder 17 to contract. The hydraulic cylinder 17 drives the clamping block 18 to separate from the corresponding first pipe 2. At this time, the spring 9 elongates, driving the movable sleeve 3 to rise, so that several groups of second pipes 6 are separated from the corresponding first pipes 2. Since the normal height of a person is between 1.6 m and 1.8 m, when the movable block 16 is outside the height range of 1.5 m to 1.9 m, the electronic component controls the warning device 14 to be yellow. When the movable block 16 is within the height range of 1.5 m to 1.9 m, the electronic component controls the warning device 14 to be red. When the staff sees that the warning device 14 is yellow or red, they can evacuate the confined space in an orderly manner. After the detection result shows green, they can return to their workstations to continue working. When the warning device 14 is red, but there are still staff members who have not evacuated, it is inevitable that this staff member will inhale a small amount of toxic gas. At this time, the yellow color can play a warning role, reminding the staff that there is toxic gas in a higher or lower space, which can prevent the toxic gas from being inhaled by the staff, thus protecting the lives of the staff.

[0031] When it is necessary to detect the air at another height, the staff first controls the electric three-way valve 10 to connect the fourth connecting pipe 23 with the third connecting pipe 22. Then, the air pump 11 is started to suck the outside air into the fourth connecting pipe 23, replacing the air in the air pump 11, the air detection device 12, the first connecting pipe 13, the second connecting pipe 21 and the third connecting pipe 22, so as to prevent the air remaining in the air pump 11, the air detection device 12, the first connecting pipe 13, the second connecting pipe 21 and the third connecting pipe 22 from affecting the detection result, thus affecting the accuracy of the detection result, making it impossible to accurately give a warning to the staff, causing the staff to be unable to evacuate in advance, and possibly leading to the staff inhaling harmful gases, posing a threat to their physical health.

[0032] The above are only the embodiments of the present invention. Common general knowledge such as the specific structure and characteristics in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the present invention.

Claims

1. A poisonous gas detection system in a confined space, characterized in that: It includes a vertical column, and several groups of sampling mechanisms for sampling air at different heights are arranged vertically in the vertical column; An electric three-way valve is provided on the uppermost sampling mechanism. A third connecting pipe and a fourth connecting pipe are provided on the electric three-way valve. The fourth connecting pipe is communicated with the outside. An air pump is provided on the third connecting pipe. A second connecting pipe is provided at the output end of the air pump. An air detection device is provided on the second connecting pipe. A first connecting pipe is connected to the air detection device, and the first connecting pipe is communicated with the outside.

2. The poisonous gas detection system in a confined space according to claim 1, characterized in that: The sampling mechanism includes a movable sleeve, which is slidably clamped in the vertical column. A first pipe is provided at the top end of the movable sleeve, and the first pipe is clamped in the vertical column. The first pipe is inserted through the movable sleeve; A number of connecting grooves are formed on the movable sleeve, and a number of second pipes are clamped in the vertical column. The second pipes are respectively aligned with the connecting grooves, and the second pipes are in contact with and perpendicular to the movable sleeve.

3. The poisonous gas detection system in a confined space according to claim 2, characterized in that: The first pipe of the sampling mechanism located below is inserted through the bottom end of the movable sleeve of the sampling mechanism located above. The first pipes and the movable sleeves are crossed and communicated with each other; Two adjacent first pipes located in the same movable sleeve do not contact each other.

4. The toxic gas detection system in a confined space according to claim 3, characterized in that: A reset component is provided between every two adjacent sampling mechanisms. The reset component includes a spring. A fixed platform is provided on the first pipe located below. The spring is inserted through the first pipe, and the two ends of the spring are respectively in contact with the fixed platform and the movable sleeve.

5. The poisoning gas detection system in a confined space according to claim 4, characterized in that: A control mechanism is provided in the vertical column. The control mechanism includes a lifting device. The lifting device includes a movable block that can move. A hydraulic cylinder is provided on the movable block, and a clamping block is provided on the hydraulic cylinder. The clamping block can be clamped on the first pipe.

6. The poisonous gas detection system in a confined space according to claim 5, characterized in that: A warning device is provided on the vertical column. The lifting device, the warning device, the electric three-way valve, the air pump and the air detection device are all connected to electronic components; The air detection device can control the warning device through the electronic components.

7. The poisonous gas detection system in a confined space according to claim 6, characterized in that: A fixed platform is provided on the vertical column, and the air pump is fixedly connected to the fixed platform.

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