Protective device for positive pressure air respirator cylinder filling operation

Abstract

This utility model relates to a protective device for filling positive pressure air respirator cylinders, comprising a cylindrical body with a male thread at the top. The male thread has a pipe fixing groove extending from the top of the thread to the root of the thread, and the fixing groove matches the filling pipe. A locking cap is provided on the upper part of the cylindrical body, and the locking cap has a female thread that mates with the male thread of the cylindrical body. Symmetrically arranged handles are provided on the side of the locking cap. This utility model's protective device for filling positive pressure air respirator cylinders is simple to operate and effective. It can effectively prevent dangerous situations such as cylinder tipping, cylinder explosion, and pipe scattering during filling due to improper operation, cylinder material problems, or broken filling pipe connections. It improves the safety factor of personnel filling positive pressure air respirator cylinders, avoids accidents causing personal injury, and eliminates safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of gas cylinder filling operations, and more specifically, to a protective device for positive pressure air respirator gas cylinder filling operations. Background Technology

[0002] Positive pressure self-contained breathing apparatus (SCBA) is mainly used in firefighting, chemical industry, shipbuilding, warehouses, laboratories, waterworks, oil and gas fields, and other fields. In harsh environments such as fires, toxic and harmful gases, and asphyxiation, workers wearing SCBA can use it for self-rescue, escape, and accident handling. During on-site maintenance, upkeep, and use, the cylinder calibration label must be clear, the cylinder body must be free of excessive scratches, and collisions with the cylinder are strictly prohibited. The operating pressure of the SCBA cylinder is between 28-30 MPa. If the pressure drops below 28 MPa, it should be refilled promptly. Currently, the following problems exist in gas cylinder filling operations: 1. The bottom of the gas cylinder is curved, making it impossible to place it vertically. During filling, operators must hold the cylinder to maintain its stability; 2. Operators hold the cylinder while filling high-pressure gas, resulting in excessive proximity to the cylinder. No safe distance is maintained between operators and the hazard source, and there are no physical barriers; 3. There are no safety measures at the connection between the filling pipeline and the filling port. If the connection breaks, the filling pipeline will fly around under high pressure, easily causing injury or death. Therefore, there are serious safety risks during the filling of positive-pressure breathing apparatus cylinders. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a protective device for filling gas cylinders of positive pressure air respirators, which can improve the safety of filling operations.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a protective device for filling gas cylinders of a positive pressure air respirator is constructed, including a cylindrical body with a male thread at the top. The male thread has a pipeline fixing groove that extends from the top of the thread to the root of the thread. The fixing groove matches the filling pipeline. A locking cover is provided on the upper part of the cylindrical body. The locking cover has a female thread that cooperates with the male thread of the cylindrical body. The locking cover has symmetrically arranged handles on its side.

[0005] According to the above scheme, the inner wall of the cylindrical body is provided with a rubber pad.

[0006] According to the above scheme, the outer wall of the cylindrical body is provided with supporting ribs.

[0007] According to the above scheme, the lower part of the cylinder body is provided with a base, and the supporting rib is fixed on the base.

[0008] According to the above scheme, the base has through holes at its four corners for installing fixing posts.

[0009] According to the above scheme, the cylindrical body is cylindrical.

[0010] The positive pressure air respirator cylinder filling operation protective device of this utility model has the following beneficial effects: 1. This utility model uses a high-strength steel cylindrical body and a locking cap to place the gas cylinder inside the cylindrical body, and sets up a hard isolation measure between the gas cylinder and the filling personnel, which effectively prevents the shock wave and fragments generated by the explosion from spreading and splashing outside the cylinder, thus avoiding accidents that cause casualties.

[0011] 2. This utility model locks the gas cylinder inside the cylindrical body by engaging the internal female thread of the locking cap with the male thread at the top of the cylindrical body. The threaded connection greatly improves the protective device's ability to withstand the impact of a high-pressure gas cylinder explosion, thereby enhancing the safety and reliability of the protective device and the safety of filling personnel. 3. The handle on the side of the lock cover is designed in this utility model. It not only serves as a gripper for the mobile protective device, but also increases the torque for tightening the lock cover through the force-adding rod of the handle, ensuring that the lock cover is tightened.

[0012] 4. This utility model uses a designed rubber pad that fits tightly against the inner wall of the cylindrical body and is placed between the gas cylinder and the inner wall of the cylindrical body. This can effectively prevent metal friction between the gas cylinder and the cylinder body, reduce wear on the gas cylinder body, and avoid damaging the gas cylinder calibration label.

[0013] 5. The design of this utility model is to match the size of the gas cylinder filling pipeline. The gas cylinder filling pipeline is placed in the slot and the locking cap is tightened. The gas cylinder filling pipeline is clamped by the clamping action formed by the fixed slot and the threaded end face of the locking cap, which effectively prevents the abnormal and dangerous situation of the gas cylinder filling pipeline flying around after it is unhooked.

[0014] 6. The four supporting ribs of this utility model are symmetrically distributed on the outer wall of the cylindrical body and connected to the base, which lowers the center of gravity of the protective device, prevents the cylindrical body from tipping over, and places the gas cylinder in the upright cylindrical body, thus solving the problem of operators holding the gas cylinder when filling it.

[0015] 7. The fixed pile designed in this utility model can fix the protective device to the ground, improve the stability of the protective device, and prevent the cylindrical body from tipping over in abnormal situations. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the protective device for filling gas cylinders of the positive pressure air respirator of this utility model; Figure 2This is a schematic diagram showing the usage status of the positive pressure air respirator cylinder filling operation protective device of this utility model.

[0017] In the diagram: 1-Cylindrical body; 2-Male thread; 3-Lock cover; 4-Handle; 5-Female thread; 6-Fixing slot; 7-Rubber pad; 8-Supporting rib; 9-Base; 10-Through hole; 11-Fixing post. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1-2 As shown, the positive pressure air respirator cylinder filling operation protective device of this utility model includes a cylindrical body 1, which is cylindrical in shape and has a male thread 2 at the top. A locking cover 3 is provided on the upper part of the cylindrical body 1, and the locking cover 3 has a female thread 5. The female thread 5 cooperates with the male thread 2 to lock the cylinder inside the cylindrical body. The threaded connection can greatly improve the impact strength of the protective device after the high pressure cylinder explodes, improve the safety and reliability of the protective device and the safety factor of the filling operation personnel.

[0020] The cylindrical body 1 and the locking cap 3 are made of high-strength steel of grade P110 with a wall thickness of 12.7mm and an internal pressure resistance of 87MPa. The gas cylinder is placed inside the cylindrical body, and a hard isolation measure is set up between the gas cylinder and the filling personnel to effectively prevent the shock wave and fragments generated by the explosion from spreading and splashing outside the cylinder, thus avoiding accidents that cause casualties.

[0021] The male thread 2 is provided with a pipeline fixing groove 6 that extends from the top of the thread to the root of the thread. The groove 6 matches the filling pipeline. The gas cylinder filling pipeline is placed in the fixing groove 6 and the locking cap 3 is tightened. The gas cylinder filling pipeline is clamped by the clamping action formed by the fixing groove 6 and the thread end face of the locking cap 3, which effectively prevents the abnormal and dangerous situation of the gas cylinder filling pipeline flying around after it is unhooked.

[0022] The lock cover 3 has symmetrically arranged handles 4 on its side, which not only serve as grippers for the moving protective device, but also increase the torque for tightening the lock cover 3 through the force-adding rod of the handle, ensuring that the lock cover 3 is tightened.

[0023] The inner wall of the cylindrical body 1 is provided with a rubber pad 7. The rubber pad 7 is closely attached to the inner wall of the cylindrical body 1 and is set between the gas cylinder and the inner wall of the cylindrical body 1. It can effectively prevent metal friction between the gas cylinder and the cylinder, reduce the wear of the gas cylinder body, and avoid damage to the gas cylinder calibration label.

[0024] The outer wall of the cylindrical body 1 is provided with supporting ribs 8. Four supporting ribs 8 are symmetrically distributed on the outer wall of the cylindrical body 1 and connected to the base 9. This lowers the center of gravity of the protective device, prevents the cylindrical body 1 from tipping over, and places the gas cylinder inside the upright cylindrical body 1, thus solving the problem of operators holding the gas cylinder when filling it.

[0025] The base 9 has through holes 10 at its four corners, and each through hole 10 has a matching fixing post 11, which can fix the protective device to the ground, improve the stability of the protective device, and prevent the cylindrical body from tipping over in abnormal situations.

[0026] The method of using this utility model is as follows: 1. Select a suitable filling operation location based on the site conditions, keeping it at least 30 meters away from the wellhead, well control equipment, densely populated areas, and personnel rest areas, and set up a warning and isolation zone; 2. Secure the protective device firmly and tighten the surrounding fixing stakes 11; 3. Remove the locking cap 3 and place the gas cylinder inside the cylindrical body 1; 4. Adjust the position of the gas cylinder filling port and the fixing slot 6 so that the gas cylinder filling port is directly opposite the fixing slot 6; 5. Pass the gas cylinder filling line through the fixing slot 6 and connect it tightly to the gas cylinder filling port; 6. Align the female thread 5 with the male thread 2, and rotate the locking cap 3 clockwise until the threaded end of the locking cap 3 is locked onto the gas cylinder filling pipeline; 7. Perform gas cylinder filling operations in accordance with the gas cylinder filling operation procedures.

[0027] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A protective device for filling gas cylinders of a positive pressure air respirator, characterized in that, The device includes a cylindrical body with a male thread at the top. The male thread has a pipeline fixing groove that extends from the top of the thread to the root of the thread and matches the filling pipeline. The upper part of the cylindrical body has a locking cover with a female thread that mates with the male thread of the cylindrical body. The side of the locking cover has symmetrically arranged handles.

2. The protective device for filling gas cylinders of a positive pressure air respirator according to claim 1, characterized in that, The inner wall of the cylindrical body is provided with a rubber pad.

3. The protective device for filling gas cylinders of a positive pressure air respirator according to claim 1, characterized in that, The outer wall of the cylindrical body is provided with supporting ribs.

4. The protective device for filling gas cylinders of a positive pressure air respirator according to claim 3, characterized in that, The lower part of the cylindrical body is provided with a base, and the supporting rib is fixed on the base.

5. The protective device for filling gas cylinders of a positive pressure air respirator according to claim 4, characterized in that, The base has through holes at its four corners for mounting and fixing columns.

6. The protective device for filling gas cylinders of a positive pressure air respirator according to claim 1, characterized in that, The cylindrical body is cylindrical in shape.

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