Limited space operation risk simulation experiment system capable of isolating gas

Abstract

The invention relates to the technical field of limited space operation risk simulation, and discloses a limited space operation risk simulation experiment system capable of isolating gas, and the system comprises a cabinet body, and also comprises an outer cylinder which is fixedly installed on the inner top wall of the cabinet body, and the outer wall of the bottom end of the outer cylinder is uniformly provided with ventilation grooves; the drawing cylinder is movably inserted into the outer cylinder, and communication grooves matched with the ventilation grooves are uniformly formed in the outer wall of the bottom end of the drawing cylinder; the bottom plate is fixedly mounted at the bottom of the drawing cylinder and used for sealing the bottom end of the drawing cylinder; the sealing cover is detachably mounted at the top end of the drawing cylinder, and a monitoring mechanism is mounted on the inner wall of the sealing cover. According to the limited space operation risk simulation experiment system capable of isolating the gas, the gas in the monitoring cavity is temporarily stored and spitted back through the gas storage cavity, gas isolation can be achieved, the problem that harmful gas leaks or external oxygen enters in the process that the monitoring mechanism is taken out or replaced is effectively solved, and the safety of operators is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of risk simulation for confined space operations, and particularly to a risk simulation experiment system for confined space operations that can isolate gases. Background Art

[0002] Confined spaces generally refer to those enclosed or semi-enclosed areas with restricted access, poor ventilation, complex environments, and internal conditions that are difficult to monitor in real time, such as sewers, storage tanks, pipelines, underground wells, etc. Due to the limited physical structure of these spaces, potential risks such as the accumulation of harmful gases, insufficient oxygen content, and the accumulation of flammable and explosive substances often occur in the internal environment. At the same time, the activities of operators are restricted. Therefore, once an accident occurs, the rescue difficulty is extremely high. Therefore, the safety of confined space operations faces multiple risks such as poisoning, asphyxiation, explosion, drowning, and falling, and these risks often interact with each other, easily triggering a chain reaction and further increasing the severity of the accident.

[0003] To improve the safety of confined space operations, risk monitoring and early warning are very crucial and necessary. Currently, various types of sensors are commonly used in the industry, such as sensors for detecting harmful gases, monitoring oxygen concentration, sensing temperature and humidity, and monitoring dust concentration, to monitor the risk factors in confined spaces in real time. To improve the versatility of the monitoring equipment, these sensors are often integrated together to form an "integrated monitor" to achieve the joint monitoring of multiple risk factors.

[0004] The design and research and development of sensor functions and the calibration of performance indicators need to be carried out in a closed space that can simulate the risk environment of confined spaces, such as an experimental chamber. However, in the existing risk simulation experimental chambers for confined spaces, during the process of taking out and replacing the monitor, problems such as the leakage of internal flammable and explosive gases and toxic and harmful substances, as well as the mixing of external air and dust, are likely to occur, leading to safety accidents and environmental pollution, endangering the lives and property safety of operators. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a risk simulation experiment system for confined space operations that can isolate gases, which has the advantage of being able to isolate gases.

[0007] (II) Technical Solutions

[0008] To achieve the above object of isolating gases, the present invention provides the following technical solutions: A risk simulation experiment system for confined space operations that can isolate gases, including a cabinet body, and further including:

[0009] An outer cylinder, fixedly installed on the inner top wall of the cabinet body, and evenly provided with air permeable grooves on the outer wall of the bottom end;

[0010] The draw tube is movably inserted into the outer tube, and communication grooves matching the ventilation grooves are uniformly formed on the outer wall of the bottom end;

[0011] The bottom plate is fixedly installed at the bottom of the draw tube and is used to seal the bottom end of the draw tube;

[0012] The cover is detachably installed at the top end of the draw tube, and a monitoring mechanism is installed on the inner wall.

[0013] As a preferred technical solution of the present invention, a bottom cylinder is fixedly installed at the bottom of the bottom plate. A fixing plate is vertically movably arranged in the bottom cylinder, and the fixing plate is supported by a pillar on the inner bottom wall of the cabinet.

[0014] As a preferred technical solution of the present invention, a cylinder is pre-installed in the pillar, and the output end of the cylinder passes through the fixing plate and is connected to the bottom plate.

[0015] As a preferred technical solution of the present invention, a one-way intake valve I and a one-way exhaust valve I are respectively installed on the bottom plate;

[0016] A one-way intake valve II and a one-way exhaust valve II are respectively installed on the outer wall of the top end of the draw tube.

[0017] As a preferred technical solution of the present invention, a tube slot for the draw tube to pass through is formed on the cabinet.

[0018] As a preferred technical solution of the present invention, a spiral guiding groove is formed on the outer wall of the upper part of the draw tube, and a vertical guiding groove is formed on the outer wall of the lower part. The bottom end of the spiral guiding groove is communicated with the top end of the vertical guiding groove;

[0019] A sliding column is slidably arranged in the spiral guiding groove and the vertical guiding groove, and the sliding column is fixedly installed on the inner wall of the tube slot.

[0020] As a preferred technical solution of the present invention, the output end of the cylinder passes through the fixing plate and is rotatably connected to the bottom plate.

[0021] As a preferred technical solution of the present invention, the cover is threadedly installed at the top end of the draw tube, and the monitoring mechanism is detachably installed on the inner wall of the cover through a clamp.

[0022] As a preferred technical solution of the present invention, four ventilation grooves and communication grooves are formed, and they can coincide or stagger.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a risk simulation experiment system for limited space operation that can isolate gas, and has the following beneficial effects:

[0025] 1. The risk simulation experiment system for confined space operations with gas isolation can achieve gas isolation by temporarily storing and discharging the gas in the monitoring chamber through the gas storage chamber, thus effectively avoiding the problems of harmful gas leakage or external oxygen entry during the removal or replacement of the monitoring mechanism, and ensuring the safety of the operators.

[0026] 2. The risk simulation experiment system for confined space operations with gas isolation can accurately control the inflow and discharge of the gas in the cabinet when simulating high-risk environments such as poisoning and combustion explosion, avoid unnecessary gas leakage or external gas entry, improve the safety and accuracy of the experiment, and thus facilitate the research and development of disaster simulation occurrence devices and multi-physical field linkage response equipment adapted to different scenarios, construct a real-time, multi-dimensional, and multi-physical field monitoring system for multiple disaster media, and establish safety protection facilities.

[0027] 3. The risk simulation experiment system for confined space operations with gas isolation has a detachable design for the cover and the monitoring mechanism, making the replacement of the monitoring mechanism very convenient, without interfering with the stability of the simulation environment, helping to improve the experimental efficiency, and also facilitating the inspection of different monitoring mechanisms. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is an enlarged schematic diagram of the outer cylinder part of the present invention;

[0030] Figure 3 is a cross-sectional view of the outer cylinder part of the present invention;

[0031] Figure 4 is a schematic diagram after the pull-out cylinder extends of the present invention;

[0032] Figure 5 is an enlarged schematic diagram of the bottom cylinder part of the present invention;

[0033] Figure 6 is an enlarged schematic diagram of the pull-out cylinder part of the present invention;

[0034] Figure 7 is a sectional view of the valve tube part of the present invention.

[0035] In the figure: 1. Cabinet; 2. Outer cylinder; 3. Venting groove; 4. Pull-out cylinder; 5. Connecting groove; 6. Cover; 7. Monitoring mechanism; 8. Bottom plate; 9. Bottom cylinder; 10. Fixed plate; 11. Support pillar; 12. Cylinder; 13. One-way intake valve I; 14. One-way exhaust valve I; 15. One-way intake valve II; 16. One-way exhaust valve II; 17. Spiral guiding groove; 18. Vertical guiding groove; 19. Slide column; 20. Valve tube; 21. Tube cavity; 22. Conical surface; 23. Valve ball; 24. Support spring; 25. Support plate; 26. Fixed rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] See also Figures 1 - 7 A gas-isolated confined space operation risk simulation experimental system includes a cabinet 1, in which risks such as poisoning, explosion, and suffocation can be simulated. Figure 1 As shown, air inlet pipes, exhaust pipes, drainage pipes, heating pipes, grain piles and other facilities can be installed in the cabinet 1 as needed.

[0039] like Figure 2 As shown, an outer tube 2 is fixedly mounted on the inner top wall of the cabinet body 1, ventilation grooves 3 are evenly provided on the outer wall at the bottom end of the outer tube 2, a pull-out tube 4 is movably inserted in the outer tube 2, and connecting grooves 5 matching with the ventilation grooves 3 are evenly provided on the outer wall at the bottom end. In the present embodiment, four ventilation grooves 3 and four connecting grooves 5 are provided, which can overlap or stagger.

[0040] In the present invention, the bottom end of the pull-out tube 4 is closed by a bottom plate 8, and the top end is closed by a cover 6. Furthermore, the cover 6 is threadedly mounted on the top end of the pull-out tube 4, and the monitoring mechanism 7 is detachably mounted on the inner wall of the cover 6 by a clamp. The detachable design of the cover 6 and the monitoring mechanism 7 makes it very convenient to replace the monitoring mechanism 7 without interfering with the stability of the simulated environment, which helps to improve the experimental efficiency and is also convenient for testing different monitoring mechanisms 7.

[0041] A monitoring cavity is formed between the drawer tube 4 and the bottom plate 8. When the air permeable groove 3 and the connecting groove 5 overlap, the monitoring cavity is connected to the space inside the cabinet 1, so as to facilitate gas monitoring.

[0042] like Figure 2 As shown, a bottom cylinder 9 is fixedly installed at the bottom of the bottom plate 8, and a fixing plate 10 is movably arranged in the bottom cylinder 9, and the fixing plate 10 is supported by a support 11 on the bottom wall of the cabinet 1, so that the position of the fixing plate 10 remains unchanged, and an air storage cavity is formed between the bottom cylinder 9 and the fixing plate 10;

[0043] like Figure 3 As shown, a one-way air intake valve 13 and a one-way air exhaust valve 14 are respectively installed on the bottom plate 8, and a one-way air intake valve 15 and a one-way air exhaust valve 16 are respectively installed on the outer wall of the top end of the drawing tube 4;

[0044] When the draw tube 4 moves upward, the ventilation slots 3 are staggered from the communication slots 5. At the same time, the volume of the gas storage cavity expands. When the volume of the gas storage cavity expands, harmful gases in the draw tube 4 can enter the gas storage cavity temporarily through the one-way intake valve I 13 (the draw tube 4 replenishes external clean air through the one-way intake valve II 15);

[0045] Thus, after the draw tube 4 moves completely upward, the harmful gases in the monitoring cavity have been completely transferred, realizing gas isolation, effectively avoiding the problem of harmful gas leakage during the removal or replacement of the monitoring mechanism 7, and ensuring the safety of the operators.

[0046] On the contrary, when the monitoring mechanism 7 is replaced and the draw tube 4 moves downward, the volume of the gas storage cavity will decrease. When the volume of the gas storage cavity decreases, the harmful gases temporarily stored in the gas storage cavity will return to the monitoring cavity through the one-way exhaust valve I 14, while the original gas in the monitoring cavity will be discharged through the one-way exhaust valve II 16; until the ventilation slots 3 coincide with the communication slots 5, just when the gas in the gas storage cavity is also discharged completely;

[0047] Thus, when the draw tube 4 moves downward again, the gas in the gas storage cavity will return to the monitoring cavity, thereby avoiding the problem of external oxygen entering.

[0048] In the present invention, through the temporary storage and return of the gas in the monitoring cavity by the gas storage cavity, gas isolation can be realized, thereby effectively avoiding the problems of harmful gas leakage or external oxygen entering during the removal or replacement of the monitoring mechanism 7, and ensuring the safety of the operators; when simulating high-risk environments such as poisoning and combustion explosion, the present invention can accurately control the inflow and discharge of the gas in the cabinet, avoid unnecessary gas leakage or external gas entering, and improve the safety and accuracy of the experiment.

[0049] As Figure 2 shown, a cylinder 12 is pre-installed in the support column 11, and the output end of the cylinder 12 passes through the fixed plate 10 and is rotatably connected to the bottom plate 8. Thus, the up and down movement of the entire draw tube 4 can be realized by the cylinder 12, which is fully electric; of course, a manual drawing method can also be adopted.

[0050] In this embodiment, a tube slot for the draw tube 4 to pass through is opened on the cabinet body 1. As Figure 6 shown, a spiral guiding groove 17 is opened on the outer wall of the upper part of the draw tube 4, and a vertical guiding groove 18 is opened on the outer wall of the lower part. The bottom end of the spiral guiding groove 17 is communicated with the top end of the vertical guiding groove 18. A sliding column 19 is slidably arranged in the spiral guiding groove 17 and the vertical guiding groove 18, and the sliding column 19 is fixedly installed on the inner wall of the tube slot;

[0051] When the drawing cylinder 4 starts to move upward, under the action of the spiral guiding groove 17, the drawing cylinder 4 will rotate simultaneously. Furthermore, the ventilation groove 3 and the communication groove 5 can be staggered more quickly. After they are staggered, the gas storage cavity can absorb the harmful gas in the monitoring cavity earlier.

[0052] An exemplary check valve structure is also provided in the present invention. Specifically, it includes a valve tube 20. A conical surface 22 is formed in the lumen 21 of the valve tube 20. A valve ball 23 is movably plugged on the conical surface 22. The valve ball 23 is supported by a support spring 24. The support spring 24 is installed on a support plate 25. The support plate 25 is fixedly installed in the lumen 21 through a fixing rod 26.

[0053] For those skilled in the art, the check valve can also be replaced with a solenoid valve.

[0054] Thus, in the present invention, the parameters and accuracy of the sensors of the monitoring mechanism 7 (such as sensors for detecting harmful gases, monitoring oxygen concentration, temperature and humidity sensing, dust concentration monitoring, etc.) can be effectively verified, achieving the purpose of correcting the parameters.

[0055] The following takes three typical application scenarios to specifically illustrate the application effect of the present invention in the risk simulation of confined space operations and the verification of sensors:

[0056] 1. Inject harmful gases (such as CO, H2S, methane, etc.) with a set concentration into the cabinet 1, and then verify the response speed, false alarm rate and sensitivity of the harmful gas detection sensor;

[0057] 2. Inject combustible gases (such as natural gas, hydrogen) into the cabinet 1, and then verify the recognition accuracy of the gas concentration monitoring sensor for the critical concentration value;

[0058] 3. Slowly inject nitrogen or carbon dioxide into the cabinet 1 to gradually dilute the oxygen concentration in the cabinet 1, and then verify the alarm accuracy of the oxygen sensor in a low-oxygen environment.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A risk simulation experiment system for working in a confined space with isolable gas, comprising a cabinet body (1), characterized in that, Also includes: The outer cylinder (2) is fixedly mounted on the inner top wall of the cabinet (1), and the outer wall at the bottom end is evenly provided with air-permeable grooves (3); The pull-out tube (4) is movably inserted in the outer tube (2), and the outer wall of the bottom end is evenly provided with connecting grooves (5) that match the air-permeable grooves (3); A bottom plate (8) is fixedly mounted on the bottom of the drawer tube (4) and is used to seal the bottom end of the drawer tube (4); The sealing cover (6) is detachably mounted on the top of the draw-out tube (4), and a monitoring mechanism (7) is mounted on the inner wall.

2. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 1, wherein: A bottom cylinder (9) is fixedly mounted at the bottom of the bottom plate (8), a fixing plate (10) is movably arranged in the bottom cylinder (9) up and down, and the fixing plate (10) is supported by pillars (11) on the inner bottom wall of the cabinet (1).

3. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 2, wherein: A cylinder (12) is pre-installed in the support (11), and an output end of the cylinder (12) passes through a fixing plate (10) and is connected to a base plate (8).

4. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 2 or 3, characterized in that: A one-way air inlet valve (13) and a one-way air exhaust valve (14) are respectively installed on the bottom plate (8); A second one-way air inlet valve (15) and a second one-way air exhaust valve (16) are respectively installed on the outer wall of the top end of the drawing cylinder (4).

5. The risk simulation experiment system for limited space operation capable of isolating gas according to claim 4, characterized in that: The cabinet body (1) is provided with a cylinder groove for allowing the pull-out cylinder (4) to pass through.

6. The risk simulation experiment system for limited space operation capable of isolating gas according to claim 5, characterized in that: A spiral guide groove (17) is provided on the outer wall of the upper portion of the drawing tube (4), and a vertical guide groove (18) is provided on the outer wall of the lower portion, wherein the bottom end of the spiral guide groove (17) is connected to the top end of the vertical guide groove (18); A sliding column (19) is slidably arranged in the spiral guide groove (17) and the vertical guide groove (18), and the sliding column (19) is fixedly mounted on the inner wall of the barrel groove.

7. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 6, characterized in that: The output end of the cylinder (12) passes through the fixed plate (10) and is rotatably connected to the bottom plate (8).

8. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 1, wherein: The sealing cover (6) is threadedly mounted on the top end of the pull-out tube (4), and the monitoring mechanism (7) is detachably mounted on the inner wall of the sealing cover (6) via a clamp.

9. The risk simulation experiment system for confined space operation capable of isolating gas according to claim 1, wherein: The ventilation grooves (3) and the connecting grooves (5) are each provided with four, and can overlap or stagger.

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