Argon filling cabin for personnel to enter

Abstract

The utility model discloses an argon filling cabin for people to enter, which comprises a main cabin and a transition cabin, the main cabin is connected with the transition cabin through a sealing cabin door, a transition cabin door is arranged on the transition cabin, and an argon protection state can be formed in the main cabin; the air exhausting air bag device is arranged in the transition cabin, and the top of the transition cabin is provided with an air bag air inlet and outlet pipeline connected with the air exhausting air bag device; the gas replacement device is arranged in the transition cabin, and a replacement exhaust port is formed in the top of the transition cabin; according to the argon filling cabin, the transition cabin is arranged on one side of the main cabin, so that the argon protection state in the main cabin can be kept unchanged, and the safety and high efficiency of personnel entering the cabin can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of argon-filled cabins, and more specifically, relates to an argon-filled cabin for personnel to enter. Background Art

[0002] In the aerospace and military industries, titanium alloys and stainless steel are extensively welded. Due to the extremely high weld quality requirements, welding is typically performed within an inert gas chamber. Existing chambers are small, and airtight gloves are inserted into the sides for manual welding. However, large parts require a larger chamber, and human arm spans are insufficient to reach the weld seams, so manual welding requires personnel to enter the chamber.

[0003] In order to ensure the purity of the protective gas and work efficiency, large chambers usually adopt the method of first evacuating the vacuum and then filling it with argon to form a qualified protective atmosphere. Therefore, when personnel enter the inert gas protection chamber, their lives must be guaranteed and the welding protective atmosphere must not be destroyed. The existing argon-filled chambers are difficult to meet the above requirements. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the existing technology and provide an argon-filled cabin for personnel to enter. The argon-filled cabin has a transition cabin on one side of the main cabin, which can not only ensure that the argon protection state in the main cabin remains unchanged, but also achieve safety and efficiency for personnel entering the cabin.

[0005] In order to achieve the above object, the utility model provides an argon-filled cabin for personnel to enter, the argon-filled cabin comprising:

[0006] A main cabin and a transition cabin, wherein the main cabin and the transition cabin are connected via a sealed cabin door, the transition cabin is provided with a transition cabin door, and an argon gas protection state can be formed in the main cabin;

[0007] An air bag exhaust device is provided in the transition cabin, and an air bag inlet and outlet pipe connected to the air bag exhaust device is provided on the top of the transition cabin;

[0008] A gas replacement device is arranged in the transition cabin, and a replacement exhaust port is provided on the top of the transition cabin.

[0009] Optionally, it also includes:

[0010] A first pressure detection device and a second pressure detection device are respectively arranged on the main cabin and the transition cabin;

[0011] The first oxygen content detection device and the second oxygen content detection device are respectively arranged on the main cabin and the transition cabin.

[0012] Optionally, a control unit is further included, and a locking device is provided on the sealed cabin door. The control unit is connected to the first oxygen content detection device, the second oxygen content detection device and the locking device, and the control unit can control the locking device according to the detection results of the first oxygen content detection device and the second oxygen content detection device.

[0013] Optionally, the gas replacement device is a diffused argon filling device, which includes an air inlet pipe and multiple distribution pipes connected to the air inlet pipe, multiple air holes are opened below the multiple distribution pipes, and multiple layers of wire mesh are arranged above the multiple distribution pipes.

[0014] Optionally, the air bag deflation device is suspended in the transition cabin, and the air bag air inlet and outlet pipes include: an air bag inflation pipe and multiple air bag exhaust pipes, and the air bag inflation pipes are provided with a decompression device and a micro-pressure gauge.

[0015] Optionally, a plurality of replacement exhaust ports are provided, each of which is connected to a replacement exhaust pipe, a replacement exhaust valve is provided on the replacement exhaust pipe, and the second oxygen content detection device is provided on the replacement exhaust pipe.

[0016] Optionally, the replacement exhaust pipe is a U-shaped pipe, and the pipe opening of the replacement exhaust pipe is horizontal or downward.

[0017] Optionally, a pressure equalizing pipeline is further included, and both ends of the pressure equalizing pipeline are respectively connected to the top of the main cabin and the replacement exhaust port.

[0018] Optionally, an air pressure balancing valve is provided on the pressure equalizing pipeline.

[0019] Optionally, an observation window and an electrical interface are provided on the transition cabin.

[0020] The utility model provides an argon-filled cabin for personnel to enter, which has the following beneficial effects:

[0021] 1. The argon filling chamber has a transition chamber on one side of the main chamber, which can not only ensure that the argon protection state in the main chamber remains unchanged, but also ensure the safety and efficiency of personnel entering the chamber;

[0022] 2. The argon filling cabin is configured with a locking device, a first oxygen content detection device, and a second oxygen content detection device, so that the sealed cabin door can be locked when the main cabin is in a qualified argon protection state and the transition cabin is in an unqualified argon protection state, thereby maintaining the qualified argon protection state in the main cabin;

[0023] 3. The argon filling chamber is equipped with a diffused argon filling device instead of a pipeline to directly pass the protective gas, thus avoiding the problem of direct mixing of the two gases and reducing the replacement efficiency.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0026] Figure 1 A schematic structural diagram of an argon-filled cabin for personnel to enter according to an embodiment of the present utility model is shown.

[0027] Description of reference numerals:

[0028] 1. Main cabin; 2. Transition cabin; 3. Sealed hatch; 4. Transition hatch; 5. Air bag exhaust device; 6. Air bag outlet pipe; 7. Gas replacement device; 8. First pressure detection device; 9. Second pressure detection device; 10. First oxygen content detection device; 11. Second oxygen content detection device; 12. Air bag inflation pipe; 13. Air bag exhaust pipe; 14. Pressure reducing device; 15. Micro-pressure gauge; 16. Replacement exhaust valve; 17. Air pressure balance valve. DETAILED DESCRIPTION

[0029] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] The utility model provides an argon-filled cabin for personnel to enter, and the argon-filled cabin comprises:

[0031] The main cabin and the transition cabin are connected by a sealed cabin door. The transition cabin is provided with a transition cabin door, and an argon gas protection state can be formed in the main cabin;

[0032] An air bag exhaust device is arranged in the transition cabin, and an air bag inlet and outlet pipe connected to the air bag exhaust device is arranged on the top of the transition cabin;

[0033] The gas replacement device is arranged in the transition cabin, and a replacement exhaust port is arranged on the top of the transition cabin.

[0034] Specifically, the main cabin is used to store large welding workpieces. As a protective atmosphere carrier, a high-purity protective atmosphere is formed by vacuuming and then filling with argon. Therefore, the main cabin is connected to a vacuuming device and an argon filling device; a sealed hatch is set at the hatch leading from the main cabin to the transition cabin. The sealed hatch is directly sealed with the main cabin to meet the leakage rate requirements when the main cabin is vacuumed; the setting of the transition cabin can not only ensure that the argon protection state in the main cabin remains unchanged, but also achieve safety and efficiency for personnel entering the cabin; the air bag device can reduce the gas in the transition cabin after inflation, and when the gas replacement device replaces the gas in the transition cabin, the gas in the transition cabin is replaced by the gas replacement device. The space is reduced, the replacement time is shortened, and high efficiency is reflected; the transition cabin is connected to the main cabin, and the transition cabin serves as a transition carrier for personnel to enter the main cabin, and the personnel environment atmosphere is converted through replacement; there is a transition cabin door on the outside of the transition cabin for personnel to enter and exit, and transparent observation windows on both sides for easy observation, electricity and gas interfaces are opened near the bottom, air bag inlet and outlet, and replacement exhaust interfaces are set on the top, a pressure monitoring interface is set on the side, and a gas detection sampling interface is set on the replacement exhaust pipeline. The transition cabin is an airtight cabin with a micro-pressure difference (≤5KPa), which ensures the sealing during the replacement process and the connection between the main cabin and the transition cabin.

[0035] Furthermore, the sealed hatch and the transition hatch are both opened and closed manually, and the transition hatch can be operated from both inside and outside. The sealed hatch is always open when personnel are working in the main cabin. In the event of an emergency, the transition cabin can be used as one of the escape routes.

[0036] Optionally, it also includes:

[0037] The first pressure detection device and the second pressure detection device are respectively arranged on the main cabin and the transition cabin;

[0038] The first oxygen content detection device and the second oxygen content detection device are respectively arranged on the main cabin and the transition cabin.

[0039] Specifically, the first pressure detection device and the second pressure detection device respectively detect the air pressure in the main cabin and the transition cabin to ensure that the air pressure in the two cabins is within the set threshold, monitor the pressure changes in the cabin in real time, and feed back to the control system for safety program logic control to protect personnel safety; the first oxygen content detection device and the second oxygen content detection device respectively detect the oxygen content of the gas in the main cabin and the transition cabin.

[0040] Optionally, a control unit is also included, and a locking device is provided on the sealed cabin door. The control unit is connected to the first oxygen content detection device, the second oxygen content detection device and the locking device. The control unit can control the locking device according to the detection results of the first oxygen content detection device and the second oxygen content detection device.

[0041] Specifically, by setting up the locking device, the first oxygen content detection device and the second oxygen content detection device, the sealed cabin door can be locked when the main cabin is in a qualified argon protection state and the transition cabin is in an unqualified argon protection state, thereby maintaining the qualified argon protection state in the main cabin.

[0042] Optionally, the gas replacement device is a diffused argon filling device, which includes an air inlet pipe and multiple distribution pipes connected to the air inlet pipe, multiple air holes are opened below the multiple distribution pipes, and multiple layers of wire mesh are arranged above the multiple distribution pipes.

[0043] Specifically, the diffused argon filling device is installed at the bottom of the transition cabin. It uses the characteristic that argon has a greater specific gravity than air to form a protective atmosphere consistent with that of the main cabin through a "piston-like displacement" replacement method; the diffused argon filling device replaces the pipeline directly through the protective gas, avoiding direct mixing of the two gases and reducing the replacement efficiency; the diffused argon filling device is a pipe group structure, which transports the argon introduced by the air inlet pipe into multiple distribution pipes. The multiple distribution pipes are densely distributed with small holes downward, and the multiple distribution pipes are covered with multiple layers of high-mesh stainless steel wire mesh, so that the single-point high-speed airflow is converted into a single gas in a slowly floating state, similar to the state of exhausting water, but the interface between the two gases is unclear and mixed. The interface continues to advance upward and eventually completes the replacement, thereby improving the replacement effect and efficiency.

[0044] Optionally, the air bag exhaust device is suspended in the transition cabin, and the air bag air inlet and outlet pipes include: an air bag inflation pipe and multiple air bag exhaust pipes, and the air bag inflation pipes are provided with a decompression device and a micro-pressure gauge.

[0045] Specifically, the air bag device is suspended in the transition cabin, and its purpose is to reduce the volume of the replacement gas and shorten the replacement time; the air bag material of the air bag device is light, easy to organize, fold-resistant, has a long life, and good air tightness; the air bag is made as large as possible under the premise of ensuring work requirements, and is inflated before replacement. Air or protective gas medium is selected according to the air tightness of the air bag, and the inflated state is maintained to complete the gas replacement. After the oxygen content is tested to meet the standard, the positive pressure in the transition cabin generated by the replacement inflation is used to exhaust the gas in the air bag. At this time, the replacement work of the transition cabin is completed.

[0046] Optionally, a plurality of replacement exhaust ports are provided, each of which is connected to a replacement exhaust pipe, the replacement exhaust pipe is provided with a replacement exhaust valve, and the second oxygen content detection device is provided on the replacement exhaust pipe.

[0047] Specifically, the replacement exhaust valve is installed on the top of the transition cabin, with a number of ≥2 groups. Different numbers of replacement exhaust ports are opened in the gas replacement stage and the airbag exhaust stage respectively. All replacement exhaust ports are opened during replacement to shorten the replacement time. When the airbag is exhausted, the number of replacement exhaust port openings is reduced to increase the pressure in the transition cabin, speed up the airbag exhaust speed, and shorten the exhaust time. However, it should be noted that the pressure in the transition cabin must not exceed the tolerance of the personnel; the diameter of the replacement exhaust port should be made as large as possible to increase the gas flow under low pressure difference.

[0048] Furthermore, the airbag inlet and outlet pipes are provided with an airbag inlet and outlet valve group, which is installed on the top of the transition cabin and is divided into an air intake valve and an exhaust valve. When air is inhaled, the exhaust valves are all closed. After inflation is completed, the air intake valves are closed, and when exhausting, the exhaust valves are all open. The air intake circuit is equipped with a pressure reducing device and a micro-pressure gauge for easy reading. The input air pressure is limited to ≤ about 10KPa. On the one hand, it ensures that the input air pressure is within the rated load range of the airbag, and on the other hand, it protects the safety of personnel and prevents excessive air pressure from causing unbearable squeezing pressure or explosion impact on personnel in unexpected situations. The airbag exhaust pipeline complies with the principle of large number and large aperture to improve exhaust efficiency. The outlet of the airbag exhaust pipeline is oriented horizontally or downward to prevent debris from falling into the valve sealing failure or entering the airbag, resulting in unpredictable consequences.

[0049] At the same time, the selection of sampling positions for the first oxygen content detection device and the second oxygen content detection device should be able to ensure that all the protective gases in the cabin are qualified. Since the specific gravity of argon is greater than that of air, the purity of low-level argon is higher than that of high-level argon, so the sampling point should be set as high as possible; since the main cabin adopts the method of vacuuming and then filling with argon, the purity uniformity of its protective gas is better, and the sampling point is as high as possible on the basis of easy maintenance. Since the transition cabin adopts the replacement method, the purity of its protective gas is greatly affected by the height, so the sampling point is set on the replacement exhaust pipe at the top of the transition cabin.

[0050] Optionally, the replacement exhaust pipe is a U-shaped pipe, and the pipe opening of the replacement exhaust pipe is horizontal or downward.

[0051] Specifically, the replacement exhaust pipe is a long pipe or a U-shaped pipe to prevent human activities and other behaviors from causing a breathing effect in the cabin (uneven pressure during gas flow, pressure fluctuations in the exhaust port area, and gas reflux), which causes air to flow back into the cabin; the outlet of the replacement exhaust pipe is facing horizontally or downward to prevent debris from falling in and causing valve sealing failure.

[0052] Optionally, a pressure equalizing pipeline is further included, with both ends of the pressure equalizing pipeline being connected to the top of the main cabin and the displacement exhaust port respectively.

[0053] Optionally, an air pressure balancing valve is provided on the pressure equalizing pipeline.

[0054] Specifically, the air pressure balance valve is located between the main cabin and the transition cabin. It opens after the transition cabin is replaced, connecting the two cabins and balancing the pressure, making it easy for personnel to open the sealed cabin door.

[0055] Optionally, an observation window and an electrical interface are provided on the transition cabin.

[0056] Example

[0057] like Figure 1 As shown, the utility model provides an argon-filled cabin for personnel to enter, and the argon-filled cabin includes:

[0058] The main cabin 1 and the transition cabin 2 are connected by a sealed cabin door 3. The transition cabin 2 is provided with a transition cabin door 4. The main cabin 1 can form an argon protection state;

[0059] The air bag device 5 is arranged in the transition cabin 2, and the top of the transition cabin 2 is provided with an air bag inlet and outlet pipe 6 connected to the air bag device 5;

[0060] The gas replacement device 7 is arranged in the transition cabin 2, and a replacement exhaust port is provided on the top of the transition cabin 2.

[0061] In this embodiment, it also includes:

[0062] The first pressure detection device 8 and the second pressure detection device 9 are respectively arranged on the main cabin 1 and the transition cabin 2;

[0063] The first oxygen content detection device 10 and the second oxygen content detection device 11 are respectively arranged on the main cabin 1 and the transition cabin 2.

[0064] In this embodiment, a control unit is also included, and a locking device is provided on the sealed cabin door. The control unit is connected to the first oxygen content detection device 10, the second oxygen content detection device 11 and the locking device. The control unit can control the locking device according to the detection results of the first oxygen content detection device 10 and the second oxygen content detection device 11.

[0065] In this embodiment, the gas replacement device 7 is a diffused argon filling device, which includes an air inlet pipe and multiple distribution pipes connected to the air inlet pipe. Multiple air holes are opened below the multiple distribution pipes, and multiple layers of wire mesh are arranged above the multiple distribution pipes.

[0066] In this embodiment, the air bag exhaust device 5 is suspended in the transition cabin 2, and the air bag air inlet and outlet pipes 6 include: an air bag inflation pipe 12 and multiple air bag exhaust pipes 13. The air bag inflation pipe 12 is provided with a pressure reducing device 14 and a micro-pressure gauge 15.

[0067] In this embodiment, a plurality of replacement exhaust ports are provided, each of which is connected to a replacement exhaust pipe, which is provided with a replacement exhaust valve 16 , and the second oxygen content detection device 11 is provided on the replacement exhaust pipe.

[0068] In this embodiment, the replacement exhaust pipe is a U-shaped pipe, and the pipe opening of the replacement exhaust pipe is horizontal or downward.

[0069] In this embodiment, a pressure equalizing pipeline is also included, and both ends of the pressure equalizing pipeline are respectively connected to the top of the main cabin 1 and the displacement exhaust port.

[0070] In this embodiment, an air pressure balancing valve 17 is provided on the pressure equalizing pipeline.

[0071] In this embodiment, an observation window and an electrical interface are provided on the transition cabin 2.

[0072] In summary, the argon-filled cabin for personnel entry provided by the present invention is used, taking the first large-scale vacuum argon-filled cabin in China for a certain military project as an example, and the argon-filled cabin is used; both the main cabin 1 and the transition cabin 2 are made of stainless steel with polished inner surfaces, and the connection between the main cabin 1 and the transition cabin 2 is sealed with a silicone seal ring, the sealed cabin door 3 is a polished stainless steel surface, and is sealed with the hatch of the main cabin 1 with a silicone seal ring, and the handwheel rotates to drive the sealed cabin door 3 to open and close, and the transmission adopts a double-output reducer + thread + hinge slide bar mechanism, and 4 sets of wedge-shaped lock tongues cooperate with the card block to realize the locking of the sealed cabin door 3, and the locking device is realized by an excitation brake. The mechanism of the transition cabin door 4 is similar to that of the sealed cabin door 3, the difference is that there is a coaxial handwheel inside the transition cabin door 4, which can be operated from both inside and outside. The airbag of the air bag device 5 is bonded with thin PVC fabric, and the pressure is maintained for 1 hour in the test without obvious pressure drop. The oxygen content detection device uses a domestic brand online trace oxygen analyzer with an accuracy of 1PPM. The pressure detection device uses an SMC digital pressure switch (equipped in both cabins) and a Leybold vacuum gauge (equipped only in main cabin 1).

[0073] Under a smooth process and with the matching personnel clothing for the equipment, personnel can enter the cabin in 30 minutes. After a period of production use by users, the feedback is good.

[0074] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An argon-filled cabin for personnel entry, characterized in that: The argon-filled chamber includes: A main cabin and a transition cabin, wherein the main cabin and the transition cabin are connected via a sealed cabin door, the transition cabin is provided with a transition cabin door, and an argon gas protection state can be formed in the main cabin; An air bag exhaust device is provided in the transition cabin, and an air bag inlet and outlet pipe connected to the air bag exhaust device is provided on the top of the transition cabin; A gas replacement device is arranged in the transition cabin, and a replacement exhaust port is provided on the top of the transition cabin.

2. The argon-filled cabin for personnel entry according to claim 1, characterized in that: Also includes: A first pressure detection device and a second pressure detection device are respectively arranged on the main cabin and the transition cabin; The first oxygen content detection device and the second oxygen content detection device are respectively arranged on the main cabin and the transition cabin.

3. The argon-filled cabin for personnel entry according to claim 2, characterized in that: It also includes a control unit, and a locking device is provided on the sealed cabin door. The control unit is connected to the first oxygen content detection device, the second oxygen content detection device and the locking device. The control unit can control the locking device according to the detection results of the first oxygen content detection device and the second oxygen content detection device.

4. The argon-filled cabin for personnel entry according to claim 1, characterized in that: The gas replacement device is a diffused argon filling device, which includes an air inlet pipe and multiple distribution pipes connected to the air inlet pipe. Multiple air holes are opened below the multiple distribution pipes, and multiple layers of wire mesh are arranged above the multiple distribution pipes.

5. The argon-filled cabin for personnel entry according to claim 1, characterized in that: The air bag exhaust device is suspended in the transition cabin. The air bag air inlet and outlet pipelines include: an air bag inflation pipeline and multiple air bag exhaust pipelines. The air bag inflation pipeline is provided with a decompression device and a micro-pressure gauge.

6. The argon-filled cabin for personnel entry according to claim 2, characterized in that: There are multiple replacement exhaust ports, each of which is connected to a replacement exhaust pipe, which is provided with a replacement exhaust valve, and the second oxygen content detection device is provided on the replacement exhaust pipe.

7. The argon-filled cabin for personnel entry according to claim 6, characterized in that: The replacement exhaust pipe is a U-shaped pipe, and the pipe opening of the replacement exhaust pipe is horizontal or downward.

8. The argon-filled cabin for personnel entry according to claim 1, characterized in that: It also includes a pressure equalizing pipeline, the two ends of which are respectively connected to the top of the main cabin and the replacement exhaust port.

9. The argon-filled cabin for personnel entry according to claim 8, characterized in that: An air pressure balancing valve is provided on the pressure equalizing pipeline.

10. The argon-filled cabin for personnel entry according to claim 1, characterized in that: The transition cabin is provided with an observation window and an electrical interface.

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