Vacuum vibration filling process method for molecular sieve particles of oxygen concentrator

Abstract

The invention belongs to the field of airplane molecular sieve oxygen production, and particularly relates to a vacuum vibration filling process method for molecular sieve particles of an oxygen concentrator. According to the method, a molecular sieve bed cylinder, one or more molecular sieve particles with fixed weight and required to be filled into the molecular sieve bed cylinder, and filling equipment (with the functions of vacuum adsorption feeding, material mixing, vibration filling, weighing and the like) are adopted; the molecular sieve bed cylinder is cleaned and dried before filling, oil stains inside and outside the molecular sieve bed cylinder are removed, and an air inlet end is sealed; the type and the total weight of molecular sieve particles needing to be filled every time are set on filling equipment, the filling equipment transmits instructions to all mechanisms through a PLC control system, and the molecular sieve particles are put in weighing feeding bins (the number of the weighing feeding bins corresponds to the type of the molecular sieve particles) of the filling equipment according to the proportion; a vacuum adsorption mechanism of the filling equipment adsorbs the molecular sieve particles in the feeding bin; a mixing mechanism of the filling equipment uniformly stirs and mixes two or more molecular sieve particles as required; the molecular sieve bed cylinder is placed in a filling area of filling equipment, and the equipment automatically clamps the molecular sieve bed cylinder; and the filling equipment carries out filling while vibrating and knocking, and the molecular sieve bed cylinder is unloaded until the filling of the molecular sieve particles accords with the weight of a single molecular sieve set by a program.

Description

Technical Field

[0001] The invention belongs to the field of oxygen concentrator molecular sieve particle filling, and specifically relates to a vacuum vibration filling process method for oxygen concentrator molecular sieve particles, which is used for vacuum vibration filling of one or two or more molecular sieve particles. Background Art

[0002] Oxygen concentrators belong to the aircraft oxygen production system. Molecular sieve particles are polar materials for the molecular sieve oxygen production function. The filling weight of the molecular sieve particles determines the oxygen production concentration of the oxygen concentrator. Traditional oxygen concentrators include molecular sieve bed cylinders and molecular sieve particles. The molecular sieve bed cylinder is cylindrical. One end of the bed cylinder has been sealed before the molecular sieve is filled, and the other end is in an open state. The molecular sieve particles are filled in the bed cylinder. The molecular sieve particles need to be filled into the molecular sieve bed of the oxygen concentrator to realize the oxygen production function. However, the molecular sieve particles are exposed to the air for a long time and are prone to adsorb water molecules in the air, causing performance failure.

[0003] The traditional molecular sieve particles are manually loaded. First, the type of molecular sieve particles is determined according to the drawing, then the molecular sieve particles are weighed according to the drawing requirements, and then the molecular sieve particles are mixed as required. Finally, the molecular sieve particles are loaded. During the loading process, a wooden hammer is used to gently tap the molecular sieve bed to ensure that the molecular sieve particles are loaded tightly. The disadvantages of manual loading are:

[0004] 1. The operator has high labor intensity;

[0005] 2. Low production efficiency;

[0006] 3. The molecular sieve particles are exposed to the air for a long time;

[0007] 4. Poor consistency in filling weight;

[0008] 5. There is a risk of incorrect filling weight.

[0009] Therefore, it is necessary to explore a vacuum vibration filling method for molecular sieve particles, which can reduce the labor intensity of the operator, improve production efficiency, reduce the time the molecular sieve particles are exposed to the air, ensure the consistency of the filling weight, and reduce the risk of human error. The present invention can solve this process technology problem. Summary of the invention

[0010] The invention provides a vacuum vibration filling process method for molecular sieve particles of an oxygen concentrator, which solves the problems existing in the traditional manual filling of molecular sieves, such as the molecular sieve particles are exposed to the air for a long time, the labor intensity of the operator is high, the production efficiency is low, the filling weight consistency is poor, and there are manual weighing errors.

[0011] The present invention provides a vacuum vibration filling process method for molecular sieve particles of an oxygen concentrator, which adopts a vacuum vibration filling device, and the device has the functions of vacuum adsorption feeding, mixing, vibration filling, and automatic weighing; the method comprises the following steps:

[0012] Step 1: Clean and dry the molecular sieve bed, remove the oil inside and outside the molecular sieve bed, and seal the air inlet end;

[0013] Step 2: Determine the type and weight of molecular sieve particles required for filling;

[0014] Step 3: The vacuum vibration filling equipment obtains molecular sieve particles of preset type and weight;

[0015] Step 4: The vacuum vibration filling equipment mixes the molecular sieve particles under vacuum;

[0016] Step 5: The vacuum vibration filling equipment transfers the mixed molecular sieve particles to the transition barrel;

[0017] Step 6: The vacuum vibration filling equipment clamps the molecular sieve bed;

[0018] Step 7: The vacuum vibration filling equipment vibrates and fills the mixed molecular sieve particles in the transition barrel into the molecular sieve bed barrel;

[0019] Step 8: Remove the filled molecular sieve bed and package it.

[0020] Optionally, the molecular sieve bed is machined from hard aluminum 2A12-T4 and then anodized with chromic acid.

[0021] Optionally, in step 1, the cleaning and drying process includes:

[0022] Place the molecular sieve bed in a clean container, pour unused warm water into the container, ensure that the molecular sieve bed is immersed in the warm water for at least 2 minutes, then scrub it repeatedly with a soft brush, then rinse it with warm water, then wipe the molecular sieve bed with a clean silk cloth, and then blow it dry with compressed gas until there is no residual water stain on the inner and outer surfaces of the molecular sieve bed;

[0023] Finally, the molecular sieve bed is placed in a drying oven and dried at a temperature of 45°C ± 5°C for 45 min to 60 min.

[0024] Optionally, the step 4 specifically includes:

[0025] A vacuum device is used to adsorb the molecular sieve particles, and the molecular sieve particles are mixed in a mixing barrel;

[0026] The vacuum device can remove the air in the molecular sieve particles when adsorbing the molecular sieve particles, ensuring that the molecular sieve particles after adsorption are in a vacuum state, thereby reducing the risk of the molecular sieve being exposed to the air and adsorbing water vapor to reduce its own performance.

[0027] Optionally, the mixing time is 60 min ± 5 min.

[0028] Optionally, the contact portion between the clamping mechanism and the molecular sieve bed is made of polyurethane material to prevent scratches on the surface of the molecular sieve bed.

[0029] Optionally, the step seven specifically includes:

[0030] During vibration filling, a rubber hammer is used to vibrate and strike the outer surface of the bed cylinder back and forth to reduce the gaps between the molecular sieve particles and ensure that the molecular sieve particles can be packed tightly.

[0031] Optionally, the step seven specifically includes:

[0032] Real-time weighing of the bed weight to see if it reaches the preset weight;

[0033] If yes, switch to other unfilled bed tubes.

[0034] The advantages of the present invention are: the vacuum vibration filling method of the molecular sieve particles described in the present invention has the following significant advantages: 1. reducing the labor intensity of the operator; 2. improving production efficiency; 3. reducing the time the molecular sieve particles are exposed to the air; 4. ensuring the consistency of the filling weight; 5. reducing the risk of errors in manual weighing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A schematic diagram of the vacuum vibration filling layout of molecular sieve particles for the oxygen concentrator provided by the present invention;

[0037] Description of reference numerals:

[0038] 1-PLC control system;

[0039] 2-Weighing feeding bin;

[0040] 3-Weighing feeding bin;

[0041] 4-molecular sieve particles;

[0042] 5-molecular sieve particles;

[0043] 6- Vacuum barrel;

[0044] 7-Automatic mixing mechanism;

[0045] 8- Transition barrel;

[0046] 9-molecular sieve bed;

[0047] 10-Clamping vibration mechanism. DETAILED DESCRIPTION

[0048] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. The following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific claims of the present invention.

[0049] The present invention provides a vacuum vibration filling process method for molecular sieve particles of an oxygen concentrator, and designs a filling device, which has the functions of vacuum adsorption feeding, mixing, vibration filling, automatic weighing, etc.

[0050] Before filling, clean and dry the molecular sieve bed 9, remove the oil inside and outside the molecular sieve bed 9, and seal the air inlet end;

[0051] The type and total weight of the molecular sieve particles to be filled each time are set on the filling device, and the filling device transmits instructions to each mechanism through the PLC control system 1.

[0052] The weighing feeding bin of the filling equipment (the number of weighing feeding bins corresponds to the type of molecular sieve particles) automatically weighs and puts in the molecular sieve particles in proportion;

[0053] The vacuum adsorption mechanism of the filling equipment adsorbs the molecular sieve particles in each feeding bin into the vacuum barrel 6, and the vacuum barrel 6 is a vacuum environment;

[0054] If you need to fill two or more molecular sieve particles, such as Figure 1 The molecular sieve particles 4 and 5, as well as the corresponding weighing feeding bins 2 and 3, the mixing mechanism of the filling equipment is put into operation to adsorb the molecular sieve particles in the vacuum barrel 6 into the automatic mixing mechanism 7 and stir them evenly; if one type of molecular sieve particles is filled, the mixing mechanism does not work.

[0055] The vacuum adsorption mechanism adsorbs the molecular sieve particles to be filled from the vacuum barrel or the mixing mechanism to the transition barrel 8 through the pipeline, thereby completing the preparation of the molecular sieve particles before filling.

[0056] After the preparation of the molecular sieve particles is completed, the molecular sieve bed cylinder 9 is placed in the filling area of ​​the filling equipment, and the equipment automatically clamps the molecular sieve cylinder;

[0057] The filling equipment vibrates and taps while filling until the molecular sieve particles are filled to the weight of a single molecular sieve set in the program, and then the molecular sieve bed is unloaded.

[0058] This embodiment provides one or two or more molecular sieve particle vacuum vibration filling process methods, which include: cleaning and drying the molecular sieve bed before filling, and using vacuum vibration filling equipment to fill after removing oil stains inside and outside the molecular sieve bed. The filling equipment required by the present invention should have functions such as vacuum adsorption feeding, mixing, vibration filling, and automatic weighing.

[0059] The type and total weight of the molecular sieve particles to be filled need to be set before each use of the filling equipment. The filling equipment transmits instructions to each mechanism through the PLC control system.

[0060] The weighing feeding bin of the filling equipment (the number of weighing feeding bins corresponds to the type of molecular sieve particles) automatically weighs and puts in the molecular sieve particles in proportion;

[0061] The vacuum adsorption mechanism of the filling equipment adsorbs the molecular sieve particles in each feeding bin into the vacuum barrel, and the vacuum barrel is a vacuum environment;

[0062] If two or more molecular sieve particles need to be filled, the mixing mechanism of the filling equipment will be put into operation to adsorb the molecular sieve particles in the vacuum barrel into the mixing mechanism and mix them evenly; if one type of molecular sieve particles is filled, the mixing mechanism will not work.

[0063] The vacuum adsorption mechanism adsorbs the molecular sieve particles to be filled from the vacuum barrel or the mixing mechanism to the transition barrel 8 through the pipeline, thereby completing the preparation of the molecular sieve particles before filling.

[0064] After the molecular sieve particles are prepared, the molecular sieve bed cylinder is placed in the filling area of ​​the filling equipment, and the equipment automatically clamps the molecular sieve cylinder;

[0065] The filling equipment vibrates and fills at the same time until the molecular sieve particles are filled to meet the weight of a single molecular sieve set in the program, and then the molecular sieve bed is unloaded.

[0066] In this embodiment, the molecular sieve bed is cleaned and dried before loading to remove oil stains inside and outside the molecular sieve bed. Because oxygen is a combustion-supporting gas, the oxygen system has oil-free requirements to prevent combustion or explosion, so the molecular sieve bed must be cleaned and dried.

[0067] In this embodiment, it is necessary to reduce the exposure time of the molecular sieve particles to the air as much as possible, because the molecular sieve particles easily absorb water molecules in the air, reducing their own functional performance. The filling equipment is used for vacuum adsorption and mixing to reduce the exposure time of the molecular sieve particles to the air.

[0068] Taking the vacuum vibration filling of molecular sieve particles in a molecular sieve bed of a certain type of oxygen concentrator as an example, the main process is as follows:

[0069] (1) Clean and dry the molecular sieve bed, remove the oil stains inside and outside the molecular sieve bed, and seal the air inlet end;

[0070] (2) Set the type and weight of molecular sieve particles to be filled according to the drawing;

[0071] (3) Weighing and feeding molecular sieve particles;

[0072] (4) Vacuum adsorption of molecular sieve particles;

[0073] (5) The mixing mechanism mixes the molecular sieve particles as required;

[0074] (6) Transferring molecular sieve particles to a transition barrel;

[0075] (7) Clamping the vibration mechanism 10 to clamp the molecular sieve bed cylinder;

[0076] (8) Vibration filling of molecular sieve particles;

[0077] (9) Check the weight of the molecular sieve after filling;

[0078] (10) Unloading the molecular sieve bed cylinder and completing the vacuum vibration filling of the molecular sieve particles;

[0079] (11) Encapsulate the outlet end of the molecular sieve bed.

[0080] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A vacuum vibration filling process for molecular sieve particles in an oxygen concentrator, characterized in that: A vacuum vibration filling device is used, which has the functions of vacuum adsorption feeding, mixing, vibration filling and automatic weighing; the method comprises the following steps; Step 1: Clean and dry the molecular sieve bed, remove the oil inside and outside the molecular sieve bed, and seal the air inlet end; Step 2: Determine the type and weight of molecular sieve particles required for filling; Step 3: The vacuum vibration filling equipment obtains molecular sieve particles of preset type and weight; Step 4: The vacuum vibration filling equipment mixes the molecular sieve particles under vacuum; Step 5: The vacuum vibration filling equipment transfers the mixed molecular sieve particles to the transition barrel; Step 6: The vacuum vibration filling equipment clamps the molecular sieve bed; Step 7: The vacuum vibration filling equipment vibrates and fills the mixed molecular sieve particles in the transition barrel into the molecular sieve bed barrel; Step 8: Remove the filled molecular sieve bed and package it.

2. The method according to claim 1, characterized in that The molecular sieve bed is machined from hard aluminum 2A12-T4 and then anodized with chromic acid.

3. The method according to claim 2, characterized in that In the step 1, the cleaning and drying process includes: Place the molecular sieve bed in a clean container, pour unused warm water into the container, ensure that the molecular sieve bed is immersed in the warm water for at least 2 minutes, then scrub it repeatedly with a soft brush, then rinse it with warm water, then wipe the molecular sieve bed with a clean silk cloth, and then blow it dry with compressed gas until there is no residual water stain on the inner and outer surfaces of the molecular sieve bed; Finally, the molecular sieve bed is placed in a drying oven and dried at a temperature of 45°C ± 5°C for 45 min to 60 min.

4. The method according to claim 1, characterized in that: The step 4 specifically includes: A vacuum device is used to adsorb the molecular sieve particles, and the molecular sieve particles are mixed in a mixing barrel; The vacuum device can remove the air in the molecular sieve particles when adsorbing the molecular sieve particles, ensuring that the molecular sieve particles after adsorption are in a vacuum state, thereby reducing the risk of the molecular sieve being exposed to the air and adsorbing water vapor to reduce its own performance.

5. The method according to claim 4, characterized in that The mixing time is 60min±5min.

6. The method according to claim 1, characterized in that The contact part between the clamping mechanism and the molecular sieve bed is made of polyurethane material to prevent scratches on the surface of the molecular sieve bed.

7. The method according to claim 1, characterized in that The step seven specifically includes: During vibration filling, a rubber hammer is used to vibrate and strike the outer surface of the bed cylinder back and forth to reduce the gaps between the molecular sieve particles and ensure that the molecular sieve particles can be packed tightly.

8. The method according to claim 1, characterized in that: The step seven specifically includes: Real-time weighing of the bed weight to see if it reaches the preset weight; If yes, switch to other unfilled bed tubes.

Images