An emergency ventilation device for confined space operations

Abstract

This utility model discloses an emergency ventilation device for confined space operations, relating to the field of emergency ventilation. It includes a base plate and further comprises: a drive assembly mounted on the top of the base plate; two symmetrically arranged compression assemblies sleeved on the outside of the drive assembly; and a ventilation assembly installed inside the compression assemblies. The ventilation assembly includes: two fixed rods fixedly mounted on the top of the base plate; and a press pump fixedly mounted on the top of the fixed rods. This emergency ventilation device for confined space operations, through a simplified mechanical structure design, reduces potential failure points and improves the reliability and durability of the device. The modular design of the drive assembly, compression assembly, and ventilation assembly simplifies assembly, maintenance, and repair. The mechanical drive mechanism drives the press pump for ventilation, reducing reliance on electricity and enabling the device to provide stable airflow in environments with unstable or no power, ensuring air circulation within the confined space.

Description

Technical Field

[0001] This utility model relates to emergency ventilation technology, specifically to an emergency ventilation device for confined space operations. Background Technology

[0002] Confined space work refers to work performed inside or within enclosed or semi-enclosed areas of a production unit, commonly found in chemical production, energy, and other fields. These work spaces typically feature restricted access and poor ventilation, including facilities such as reactors, pipelines, storage tanks, and basements, which are prone to accumulating toxic or harmful gases or posing a risk of oxygen deficiency. Strict adherence to safety regulations is required, including obtaining a "Confined Space Safety Work Permit," implementing physical isolation (such as blind flanges), forced ventilation, and gas detection (oxygen content 18%–21% / oxygen-enriched environment upper limit 23.5%, toxic gas concentrations meeting standards). Lighting must be provided using a safe voltage of 36V or lower, protective equipment such as gas masks must be worn, a dedicated supervisor must be present, and an emergency response mechanism must be in place. If work is interrupted for more than 30 minutes, a re-test is required. The relevant regulations were first established in the "Safety Regulations for Confined Space Work in Chemical Production Units" (AQ3028—2008), and later incorporated into the "Safety Regulations for Special Operations in Hazardous Chemical Enterprises" (GB 30871-2022). By implementing tiered management, work permit systems, and standardized procedures, the risks of accidents such as suffocation and poisoning have been reduced, forming a comprehensive management system covering approval, operation, and emergency response.

[0003] Existing emergency ventilation devices for confined space operations are overly complex in structure and prone to failure. Furthermore, the airflow of electrically driven ventilation devices in confined spaces is greatly affected by the power supply, making it impossible to provide a stable airflow. Utility Model Content

[0004] The purpose of this invention is to provide an emergency ventilation device for confined space operations, in order to address the aforementioned shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an emergency ventilation device for confined space operations, comprising a base plate, and further comprising:

[0006] The drive assembly is mounted on top of the base plate;

[0007] Two symmetrically arranged extrusion components are fitted onto the outside of the drive component;

[0008] A ventilation assembly, which is installed inside the extrusion assembly;

[0009] The ventilation assembly includes:

[0010] Two symmetrically arranged fixing rods are fixedly installed on the top of the base plate;

[0011] The press pump is fixedly installed on the top of the fixed rod;

[0012] A one-way diaphragm is installed inside the pump.

[0013] Furthermore, the driving component includes:

[0014] Two sets of symmetrically arranged fixed piles are fixedly installed on the top of the base plate;

[0015] Two symmetrically arranged sliding rods are fixedly installed on the inner wall of the fixed pile;

[0016] Two sets of symmetrically arranged limiting plates are fixedly installed on one side of the slide bar;

[0017] The rotating power component is fixedly installed at the bottom of the base plate.

[0018] Furthermore, the driving component also includes:

[0019] Two symmetrically arranged rotational axes are rotatably connected to the inner wall of the base plate;

[0020] Two symmetrically arranged limiting wheels are fitted onto the outside of the rotating shaft;

[0021] A belt, which is fitted onto the outside of the limit wheel;

[0022] Two symmetrically arranged drive blocks are fitted onto the outside of the belt.

[0023] Furthermore, one of the rotating shafts is connected to the output end of the rotating power component.

[0024] Furthermore, both of the extrusion assemblies include:

[0025] A slider, which is fitted onto the outside of a sliding rod;

[0026] A fixing plate is fixedly installed on the top of the slider;

[0027] The extrusion rod is fixedly installed on one side of the fixed plate.

[0028] Furthermore, the extrusion rod is slidably connected to the outside of the press pump.

[0029] Compared with the prior art, the emergency ventilation device for confined space operations provided by this utility model reduces failure points and improves the reliability and durability of the device through a simplified mechanical structure design. The modular design of the specific structure, such as the drive component, the squeezing component and the ventilation component, makes assembly, maintenance and repair easier. The mechanical drive method drives the press pump for ventilation, reducing the dependence on electricity and providing a stable air volume in environments with unstable power or no power supply, ensuring air circulation in confined spaces. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0031] Figure 1 A perspective view of the overall structure provided for an embodiment of this utility model;

[0032] Figure 2 A perspective view of the drive component structure provided in an embodiment of this utility model;

[0033] Figure 3 A perspective view of the extrusion assembly structure provided in an embodiment of this utility model;

[0034] Figure 4 This is a partial longitudinal sectional perspective view of the ventilation component structure provided in an embodiment of the present utility model.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Base plate; 2. Drive assembly; 21. Rotating shaft; 22. Limiting wheel; 23. Rotational power component; 24. Fixing post; 25. Belt; 26. Drive block; 27. Limiting plate; 28. Slide rod; 3. Extrusion assembly; 31. Slider; 32. Fixing plate; 33. Extrusion rod; 4. Ventilation assembly; 41. One-way membrane; 42. Fixing rod; 43. Press pump. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0038] Example 1:

[0039] Please see Figure 1 - Figure 4 An emergency ventilation device for confined space operations includes a base plate 1, and further includes:

[0040] Drive assembly 2, which is mounted on top of base plate 1;

[0041] Two symmetrically arranged extrusion components 3 are sleeved on the outside of the drive component 2;

[0042] Ventilation component 4 is installed inside extrusion component 3.

[0043] Specifically, the base plate 1 is made of high-strength alloy steel, such as 45# steel. This type of steel has good mechanical properties and can withstand the overall weight of the device as well as various loads generated during operation, ensuring the stability of the device.

[0044] Ventilation component 4 includes:

[0045] Two symmetrically arranged fixing rods 42 are fixedly installed on the top of the base plate 1;

[0046] The press pump 43 is fixedly installed on the top of the fixing rod 42;

[0047] One-way membrane 41 is installed inside the press pump 43.

[0048] Specifically, the fixing rod 42 is made of a 20mm diameter stainless steel round tube. Stainless steel is corrosion-resistant and has high strength, making it suitable for environments such as humidity and high temperature that may exist inside the equipment. The two fixing rods 42 are arranged symmetrically. The model of the pressure pump 43 is determined according to the required ventilation volume and air pressure of the equipment. The one-way diaphragm 41 is made of silicone rubber, which has good elasticity and sealing properties, enabling one-way ventilation under certain pressure.

[0049] The ventilation assembly 4 should be inspected at regular intervals, such as weekly, to check whether the fixing rod 42 is loose, whether the press pump 43 is operating normally, and whether the one-way membrane 41 is damaged or aged.

[0050] Regularly clean the surface of the press pump 43 to remove dust and debris, preventing them from entering the pump and affecting its performance. Simultaneously, clean the one-way diaphragm 41 to ensure its surface is free of dirt and that the one-way ventilation function is functioning correctly.

[0051] If the one-way membrane 41 is found to be damaged, aged, or not properly sealed, a new one-way membrane 41 should be replaced in time; if the press pump 43 malfunctions and cannot work properly, it should be repaired or replaced according to the specific situation.

[0052] The working parts of the equipment generate heat and potentially harmful gases during operation. The air outlet of the ventilation component 4 is connected to the area inside the equipment that requires ventilation, such as around the working parts, via a pipe. When the press pump 43 is working, through continuous pressing and suction actions, fresh air from the outside is drawn into the press pump 43 through the one-way membrane 41 of the air inlet, and then discharged into the equipment through the one-way membrane 41 of the air outlet, thus achieving the purpose of ventilation.

[0053] Driver component 2 includes:

[0054] Two sets of symmetrically arranged fixed piles 24 are fixedly installed on the top of the base plate 1;

[0055] Two symmetrically arranged sliding rods 28 are fixedly installed on the inner wall of the fixed pile 24;

[0056] Two sets of symmetrically arranged limiting plates 27 are fixedly installed on one side of the slide bar 28;

[0057] Rotational power component 23 is fixedly installed at the bottom of base plate 1;

[0058] Two symmetrically arranged rotating shafts 21 are rotatably connected to the inner wall of the base plate 1;

[0059] Two symmetrically arranged limiting wheels 22 are fitted onto the outside of the rotating shaft 21;

[0060] The belt 25 is fitted onto the outside of the limiting wheel 22;

[0061] Two symmetrically arranged drive blocks 26 are fitted onto the outside of the belt 25.

[0062] In a specific implementation, one of the rotating shafts 21 is connected to the output end of the rotating power component 23. The rotating power component 23 includes, but is not limited to, a DC motor, which is electrically connected to an external power source and is controlled by an external PLC programming program. The output end of the rotating power component 23 has a coupling, which is fixedly connected to the rotating shaft 21 through the coupling and is used to drive the rotating shaft 21 to rotate.

[0063] During the operation of drive assembly 2, it should be monitored regularly. Observe the operating status of rotating power component 23 and check for abnormal noise, vibration, or overheating; check whether the tension of belt 25 is appropriate and whether there is wear or breakage; check whether the movement of drive block 26 on slide bar 28 is smooth and whether there is any jamming or abnormal deviation; check whether limit plate 27 and limit wheel 22 are damaged or deformed. Based on the monitoring, perform timely maintenance on drive assembly 2, lubricate rotating power component 23 regularly, and replace worn parts; adjust the tension of belt 25 and replace belt 25 if necessary; clean dust and debris from slide bar 28 and drive block 26 to ensure smooth movement; check and tighten the connecting bolts between components to ensure a firm and reliable connection.

[0064] Both extrusion components 3 include:

[0065] Slider 31 is sleeved on the outside of slider 28;

[0066] The fixing plate 32 is fixedly installed on the top of the slider 31;

[0067] The compression rod 33 is fixedly installed on one side of the fixing plate 32.

[0068] In a specific implementation, the extrusion rod 33 is slidably connected to the outer side of the press pump 43. The slide rod 28 is made of a high-strength, low-friction metal material, such as stainless steel, to ensure sufficient strength and rigidity while reducing friction when the slider 31 slides. The slider 31 is a hollow cylindrical structure with an inner diameter matching the diameter of the slide rod 28 to ensure smooth sliding of the slider 31 on the slide rod 28. The slider 31 is made of a wear-resistant metal material, such as cast iron, and its inner surface is chrome-plated to further improve its wear resistance and smoothness. The extrusion rod 33 is made of a high-hardness metal material, such as 45# steel, and is heat-treated to improve its strength and toughness. The diameter of the extrusion rod 33 is determined according to the size of the object being extruded and the required extrusion pressure.

[0069] Working principle: When in use, the rotating power component 23 is activated, which drives one of the rotating shafts 21 to rotate via a coupling. The rotating shaft 21 drives the limit wheel 22 to rotate, which in turn drives the other limit wheel 22 to rotate via a belt 25. The belt 25 further drives the drive block 26 to move, which in turn drives the slider 31 to move. The slider 31 drives the fixed plate 32 and the pressing rod 33 to move in opposite directions along the length of the slide rod 28, so that the pressing rod 33 can press the pump 43. When the pressing reaches a certain degree, the rotating power component 23 is reversed, so that the pressing rod 33 moves away from the pump 43. This process is repeated to achieve ventilation of the space.

[0070] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An emergency ventilation device for confined space operations, comprising a base plate (1), characterized in that, Also includes: The drive assembly (2) is mounted on top of the base plate (1); Two symmetrically arranged extrusion components (3) are fitted on the outside of the drive component (2); Ventilation assembly (4), which is installed inside the extrusion assembly (3); The ventilation assembly (4) includes: Two symmetrically arranged fixing rods (42) are fixedly installed on the top of the base plate (1); The press pump (43) is fixedly installed on the top of the fixing rod (42); A one-way membrane (41) is installed inside the press pump (43).

2. An emergency ventilation device for confined space operations according to claim 1, characterized in that, The driving component (2) includes: Two sets of symmetrically arranged fixed piles (24) are fixedly installed on the top of the base plate (1); Two symmetrically arranged sliding rods (28) are fixedly installed on the inner wall of the fixed pile (24); Two sets of symmetrically arranged limiting plates (27) are fixedly installed on one side of the slide bar (28); Rotational power component (23) is fixedly installed at the bottom of base plate (1).

3. An emergency ventilation device for confined space operations according to claim 2, characterized in that, The driving component (2) also includes: Two symmetrically arranged rotation axes (21) are rotatably connected to the inner wall of the base plate (1); Two symmetrically arranged limiting wheels (22) are fitted on the outside of the rotating shaft (21); A belt (25) is fitted around the outside of the limiting wheel (22); Two symmetrically arranged drive blocks (26) are fitted on the outside of the belt (25).

4. An emergency ventilation device for confined space operations according to claim 3, characterized in that, One of the rotating shafts (21) is connected to the output end of the rotating power component (23).

5. An emergency ventilation device for confined space operations according to claim 1, characterized in that, Both of the extrusion assemblies (3) include: The slider (31) is fitted onto the outside of the slider (28); A fixing plate (32) is fixedly installed on the top of the slider (31); The compression rod (33) is fixedly installed on one side of the fixing plate (32).

6. An emergency ventilation device for confined space operations according to claim 5, characterized in that, The extrusion rod (33) is slidably connected to the outside of the press pump (43).

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