Filling device of nitrogen making machine

Abstract

The utility model relates to the field of nitrogen making, in particular to a filling device of a nitrogen making machine, which is characterized in that a guide rod is vertically mounted in a guide sleeve in a sliding manner, an upper screen plate for compressing molecular sieve filling is fixedly mounted at the lower end of the guide rod, and a spring supporting seat is vertically mounted on the guide rod between the guide sleeve and the upper screen plate in a sliding manner; a compression spring is arranged between the guide sleeve and the spring supporting seat, a ratchet mechanism for limiting the spring supporting seat to move downwards along the guide rod is arranged on the spring supporting seat, and a driving mechanism for driving the spring supporting seat to move upwards along the guide rod is further arranged on the spring supporting seat; when the thrust of the compression spring is reduced to a preset value, the incomplete gear drives the spring supporting seat to move upwards for a certain distance along the guide rod through the rack, so that the compression spring returns to the compressed state again, the compression spring keeps proper thrust on the spring supporting seat and the upper screen plate, and the molecular sieve filler is effectively compressed.

Description

Technical Field

[0001] The utility model relates to the field of nitrogen making, in particular to a filling device for a nitrogen making machine. Background Art

[0002] The pressure swing adsorption nitrogen generator uses compressed air as raw material and carbon molecular sieve as adsorbent. It uses the differences in adsorption capacity, adsorption rate, adsorption force of oxygen and nitrogen on carbon molecular sieve and the characteristic that molecular sieve has different adsorption capacity for oxygen and nitrogen with different pressures to achieve oxygen and nitrogen separation.

[0003] The utility model with application number CN201921828952.7 discloses a molecular sieve compression device, including a container, an upper spring positioning tube and a lower spring positioning tube are arranged in the container cavity, a compression spring is arranged around the outer sides of the upper spring positioning tube and the lower spring positioning tube, a sieve plate is arranged at the lower end of the compression spring, a palm mat is arranged at the lower end of the sieve plate away from the compression spring, and a molecular sieve is arranged at the lower end of the palm mat away from the sieve plate. When the packing descends, the spring can quickly compensate for the space after the descent, preventing the molecular sieve from producing piston-like up and down movement, and effectively avoiding the friction generated by the molecular sieve when it is loose, resulting in surface powdering.

[0004] However, the above molecular sieve pressing device uses springs and sieve plates to press the molecular sieve in a limited range. When the nitrogen generator is used for a long time, the springs and sieve plates cannot effectively press the molecular sieve, and the problem of molecular sieve powdering inevitably occurs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a filling device for a nitrogen generator, which can effectively compress the molecular sieve to solve the problems in the prior art.

[0006] To solve the above technical problems, the technical solution of the utility model is: a filling device for a nitrogen generator, comprising an adsorption tower, a lower mesh plate fixedly installed in the adsorption tower, and a molecular sieve filler is arranged on the top of the lower mesh plate; a support plate fixedly installed in the adsorption tower, a guide sleeve fixedly installed on the support plate, a guide rod vertically slidably installed in the guide sleeve, a mesh plate for compressing the molecular sieve filler is fixedly installed at the lower end of the guide rod, a spring support seat is vertically slidably installed on the guide rod located between the guide sleeve and the mesh plate, a compression spring is arranged between the guide sleeve and the spring support seat, a ratchet mechanism for limiting its downward movement along the guide rod is arranged on the spring support seat, and a driving mechanism for driving it to move upward along the guide rod is also arranged on the spring support seat.

[0007] As a preferred technical solution, the ratchet mechanism includes a first mounting groove arranged on one side of the guide rod, a vertically extending ratchet bar is fixedly installed in the first mounting groove, a pawl matching the ratchet bar is rotatably installed in the spring support seat, a metal spring sheet for pushing the pawl to engage with the ratchet bar is also installed in the spring support seat, and the pawl is provided with a handle for driving it to rotate.

[0008] As a preferred technical solution, the driving mechanism includes a second mounting groove on one side of the guide rod, a vertically extending rack is fixedly installed in the second mounting groove, a rotating rod driven to rotate by a motor is provided on the spring support seat, the rotating rod extends horizontally, and an incomplete gear matching the rack is fixedly installed on the rotating rod.

[0009] As a further improvement, a vertically extending sliding rod is fixedly mounted on the top of the mesh plate, and a sliding sleeve matching the sliding rod is fixedly mounted on the support plate.

[0010] As a further improvement, a palm cushion layer is provided between the mesh plate and the molecular sieve filler.

[0011] After adopting the above technical scheme, the beneficial effect of the utility model is: when the thrust of the compression spring is reduced to a predetermined value, the incomplete gear is driven by the motor to rotate in a specific direction, and when the incomplete gear is rotated to engage with the corresponding rack, the incomplete gear drives the spring support seat to move upward along the guide rod a certain distance through the rack, so that the compression spring returns to a compressed state, so that the compression spring maintains an appropriate thrust on the spring support seat and the screen plate, thereby effectively compressing the molecular sieve filler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 A cross-sectional schematic diagram of

[0015] Figure 3 yes Figure 1 A partial enlarged view of

[0016] Figure 4 yes Figure 3A partial cross-sectional schematic diagram of

[0017] Figure 5 yes Figure 4 Schematic diagram of the left side.

[0018] In the figure: 1-adsorption tower; 2-lower mesh plate; 3-molecular sieve filler; 4-inlet pipe; 5-gas distribution plate; 6-outlet pipe; 7-support plate; 8-guide sleeve; 9-guide rod; 10-upper mesh plate; 11-slide rod; 12-slide sleeve; 13-coir cushion; 14-spring support seat; 15-mounting hole; 16-compression spring; 17-first mounting groove; 18-ratchet bar; 19-mounting groove; 20-ratchet pawl; 21-pin shaft; 22-metal spring; 23-second mounting groove; 24-rack; 25-mounting part; 26-motor; 27-rotating rod; 28-incomplete gear; 29-pressure sensor; 30-handle. DETAILED DESCRIPTION

[0019] like Figures 1 to 5 As shown, a filling device for a nitrogen generator includes an adsorption tower 1, a lower mesh plate 2 is fixedly installed in the lower end of the adsorption tower 1 by bolts, and a molecular sieve filler 3 is provided on the top of the lower mesh plate 2. An air inlet pipe 4 is provided at the bottom of the adsorption tower 1, one end of the air inlet pipe 4 extends into the adsorption tower 1 and is fixedly installed with a gas distribution plate 5, the gas distribution plate 5 is located below the lower mesh plate 2, and an air outlet pipe 6 is provided on the top of the adsorption tower 1. Compressed air is injected into the adsorption tower 1 through the air inlet pipe 4, oxygen in the compressed air is absorbed by the molecular sieve filler 3, and nitrogen of a certain purity is discharged through the air outlet pipe 6.

[0020] like Figure 2 As shown, a support plate 7 is fixedly installed in the upper end of the adsorption tower 1, and the left and right ends of the support plate 7 are respectively fixedly installed on the left and right side walls of the adsorption tower 1 by bolts. A guide sleeve 8 is welded in the middle of the support plate 7, and a guide rod 9 is vertically slidably installed in the guide sleeve 8. The cross-section of the guide rod 9 is rectangular as a whole, and a mesh plate 10 for pressing the molecular sieve filler 3 is fixedly installed on the lower end of the guide rod 9 by bolts. In order to improve the stability of the up and down movement of the mesh plate 10, a vertically extending slide bar 11 is fixedly installed on the top of the mesh plate 10 by bolts, and two slide bars 11 are arranged side by side on the left and right, and a slide sleeve 12 matching the slide bar 11 is fixedly installed on the support plate 7 by bolts. In order to prevent excessive friction between the mesh plate 10 and the molecular sieve filler 3, a palm cushion layer 13 is provided between the bottom of the mesh plate 10 and the molecular sieve filler 3.

[0021] like Figure 3 and Figure 4As shown, a spring support seat 14 is vertically slidably mounted on the guide rod 9 between the guide sleeve 8 and the upper screen 10, and a mounting hole 15 matching the guide rod 9 is provided at the center of the spring support seat 14, and the mounting hole 15 vertically penetrates the spring support seat 14. A compression spring 16 is provided between the guide sleeve 8 and the spring support seat 14, and the compression spring 16 is sleeved on the guide rod 9 between the guide sleeve 8 and the spring support seat 14. A ratchet mechanism is provided on the spring support seat 14 to limit its downward movement along the guide rod 9. Specifically, the ratchet mechanism includes a first mounting groove 17 provided on the left and right sides of the guide rod 9, a vertically extending ratchet bar 18 is fixedly installed in the first mounting groove 17 by screws, mounting grooves 19 are respectively provided on the left and right side walls of the mounting hole 15, a pawl 20 matching the ratchet bar 18 is rotatably installed in the mounting groove 19, and the pawl 20 is rotatably installed in the corresponding mounting groove 19 through a pin shaft 21 extending forward and backward; a metal spring piece 22 for pushing the pawl 20 to engage with the ratchet bar 18 is provided in the mounting groove 19, the metal spring piece 22 is V-shaped, one arm of the metal spring piece 22 is fixedly installed on the inner wall of the mounting groove 19 by bolts, and the other arm abuts against the side of the pawl 20 away from the ratchet bar 18. In addition, a handle 30 is integrally formed at one end of the pawl 20 close to the pin shaft 21, and a through hole for the handle 30 to pass through is provided on the side wall of the mounting groove 19. By turning the handle 30, the pawl 20 can be separated from the ratchet bar 18, thereby adjusting the initial position of the spring support seat 14 up and down.

[0022] When there is no external force, the metal spring 22 gives the pawl 20 a thrust toward the ratchet bar 18, so that the pawl 20 and the ratchet bar 18 remain in meshing state, so that the spring support seat 14 can only slide upward along the guide rod 9, but cannot slide downward along the guide rod 9. In the initial state, the compression spring 16 gives the spring support seat 14 a downward thrust, and the spring support seat 14 transmits the thrust of the compression spring 16 to the guide rod 9 through the ratchet mechanism, so that the screen plate 10 presses the molecular sieve filler 3 downward.

[0023] like Figure 3 and Figure 5As shown, the spring support seat 14 is also provided with a driving mechanism for driving it to move upward along the guide rod 9. Specifically, the driving mechanism includes a second mounting groove 23 provided on the front and rear sides of the guide rod 9, a rack 24 extending vertically is fixedly installed in the second mounting groove 23 by screws, and the bottoms of the left and right ends of the spring support seat 14 are respectively provided with mounting parts 25 extending downward, and a rotating rod 27 driven to rotate by a motor 26 is provided between the two mounting parts 25, and the rotating rod 27 extends horizontally left and right. The two rotating rods 27 are respectively located on the front and rear sides of the guide rod 9, and the right end of the rotating rod 27 is fixedly connected to the rotating shaft of the motor 26 through a coupling, and the motor 26 is installed on the right mounting part 25 by bolts, and the left end of the rotating rod 27 is rotatably installed on the left mounting part 25 through a bearing, and an incomplete gear 28 matching the corresponding rack 24 is fixedly installed on the rotating rod 27.

[0024] After the molecular sieve packing 3 has been flushed for a long time, the molecular sieve packing 3 moves and rubs against each other, and part of the molecular sieve packing 3 is powdered, causing the top of the molecular sieve packing 3 to sink. In the initial state, the teeth on the incomplete gear 28 are not engaged with the corresponding rack 24, and the incomplete gear 28 will not prevent the guide rod 9 and the rack 24 from sliding upward along the guide rod 9; when the top of the molecular sieve packing 3 sinks, the compression spring 16 can drive the guide rod 9 and the upper screen plate 10 downward through the spring support seat 14 to press the molecular sieve packing 3 downward.

[0025] As the spring support seat 14, the guide rod 9 and the screen plate 10 continuously move downward to compress the molecular sieve filler 3, the compression spring 16 continuously stretches, resulting in a weakening of the compression force of the screen plate 10 on the molecular sieve filler 3. In this embodiment, a pressure sensor 29 is provided at the bottom of the guide sleeve 8, and the upper end of the compression spring 16 abuts against the bottom of the pressure sensor 29. When the pressure sensor 29 detects that the thrust of the compression spring 16 is reduced to a predetermined value, the incomplete gear 28 is driven by the motor 26 to rotate in a specific direction. When the incomplete gear 28 rotates to mesh with the corresponding rack 24, the incomplete gear 28 drives the spring support seat 14 to move upward along the guide rod 9 by a certain distance through the rack 24, so that the compression spring 16 returns to a compressed state, so that the compression spring 16 maintains an appropriate thrust on the spring support seat 14 and the screen plate 10, thereby effectively compressing the molecular sieve filler 3.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A filling device for a nitrogen generator, characterized in that: It comprises an adsorption tower, in which a lower mesh plate is fixedly installed, and a molecular sieve filler is arranged on the top of the lower mesh plate; a support plate is fixedly installed in the adsorption tower, and a guide sleeve is fixedly installed on the support plate, a guide rod is vertically slidably installed in the guide sleeve, a mesh plate for compressing the molecular sieve filler is fixedly installed at the lower end of the guide rod, a spring support seat is vertically slidably installed on the guide rod between the guide sleeve and the mesh plate, a compression spring is arranged between the guide sleeve and the spring support seat, a ratchet mechanism for limiting its downward movement along the guide rod is arranged on the spring support seat, and a driving mechanism for driving it to move upward along the guide rod is also arranged on the spring support seat.

2. A nitrogen generator filling device as claimed in claim 1, characterized in that: The ratchet mechanism includes a first mounting groove arranged on one side of the guide rod, a vertically extending ratchet bar is fixedly installed in the first mounting groove, a pawl matching the ratchet bar is rotatably installed in the spring support seat, a metal spring sheet for pushing the pawl to engage with the ratchet bar is also installed in the spring support seat, and the pawl is provided with a handle for driving it to rotate.

3. A nitrogen generator filling device as claimed in claim 1, characterized in that: The driving mechanism includes a second mounting groove on one side of the guide rod, a vertically extending rack is fixedly installed in the second mounting groove, a rotating rod driven to rotate by a motor is provided on the spring support seat, the rotating rod extends horizontally, and an incomplete gear matching the rack is fixedly installed on the rotating rod.

4. A nitrogen generator filling device as claimed in claim 1, characterized in that: A vertically extending sliding rod is fixedly mounted on the top of the net plate, and a sliding sleeve matching the sliding rod is fixedly mounted on the support plate.

5. A filling device for a nitrogen generator as claimed in claim 1, characterized in that: A palm cushion layer is provided between the screen plate and the molecular sieve filler.

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