Convenient-to-disassemble compression device for molecular sieve of nitrogen making machine

Abstract

The compression device comprises an adsorption tower, an upper opening of the adsorption tower is provided with an adsorption tower end cover, and the upper end of the adsorption tower end cover is provided with a cylinder barrel; a cylinder is arranged between the cylinder barrel and the adsorption tower end cover, an air outlet pipe is arranged on the side wall of the cylinder, a piston is slidably mounted in the cylinder barrel, and the lower end of the piston is connected with a lower pressure head through a piston rod; a through hole is formed in the center of the adsorption tower end cover, the lower pressing head freely penetrates through the through hole up and down, a pressure distribution disc is arranged at the top in the adsorption tower, and the pressure distribution disc is pressed by the lower pressing head. According to the utility model, the pressing device at the top of the adsorption tower can be conveniently detached during transportation, so that the overall height is reduced, and in addition, the effective nitrogen-making space of the adsorption tower can be increased.

Description

Technical Field

[0001] This utility model relates to a pressing device for a nitrogen generator molecular sieve that is easy to disassemble, and belongs to the field of pressing technology for nitrogen generator molecular sieves. Background Technology

[0002] Molecular sieves are the core nitrogen-producing material in pressure swing adsorption (PSA) nitrogen generators. They are typically packed inside a dedicated adsorption tower. Compressed air enters the tower and is adsorbed by the molecular sieves to produce nitrogen. During nitrogen production, the PSA process involves adsorption, pressure equalization, and desorption, with frequent switching between these processes. This causes the molecular sieves inside the tower to be repeatedly impacted by compressed air at 0.6-0.75 MPa, leading to wear, pulverization, and settling. This uneven settling of the molecular sieves within the tower alters their density, necessitating a clamping device to compress them. Current technology typically uses cylinders for clamping. To ensure uniform force on the molecular sieves, multiple cylinders are usually required simultaneously. However, it's impossible to guarantee that the forces exerted by the cylinders are identical, resulting in unbalanced forces and potential damage to the molecular sieves.

[0003] Chinese utility model patent CN221742928U discloses a clamping device for molecular sieves in a nitrogen generator. A cylinder is fixed to the upper end of the adsorption tower flange cover, and a piston is installed inside the cylinder. A piston rod is installed at the lower end of the piston, and the lower end of the piston rod passes through the adsorption tower flange cover. A pressure head is installed at the lower end of the piston rod to clamp the molecular sieve inside the adsorption tower. The pressure head in this structure is located below the adsorption tower flange cover and cannot be removed. Adding this clamping device to the top of the adsorption tower results in a relatively high overall height, exceeding the height limit for customs transport. Furthermore, the nitrogen outlet pipe is below the adsorption tower flange cover, while the molecular sieve can only be below the nitrogen outlet pipe, resulting in a small effective nitrogen production space in the adsorption tower.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] This invention addresses the shortcomings of the prior art by providing a conveniently disassembled clamping device for the molecular sieve of a nitrogen generator. The clamping device on the top of the adsorption tower can be easily removed during transportation, reducing the overall height. In addition, it can increase the effective nitrogen production space of the adsorption tower.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] A compaction device for a nitrogen generator molecular sieve that is easy to disassemble includes an adsorption tower, an adsorption tower end cap installed at the upper opening of the adsorption tower, and a cylinder provided at the upper end of the adsorption tower end cap.

[0008] A cylinder is provided between the cylinder and the adsorption tower end cap. An outlet pipe is provided on the side wall of the cylinder. A piston is slidably installed inside the cylinder. The lower end of the piston is connected to the lower pressure head through a piston rod.

[0009] The adsorption tower end cap has a through hole at the center, and the pressure head can freely move up and down through the through hole. The top of the adsorption tower is equipped with a pressure distribution plate, and the pressure head presses the pressure distribution plate tightly.

[0010] Furthermore, the cylinder is open at both the top and bottom, the lower end of the cylinder is fixed to the upper surface of the cylinder, and the upper end of the cylinder is fixed with a cylinder end cap. The adsorption tower end cap, the cylinder, and the cylinder are coaxially arranged.

[0011] Furthermore, the pressure head is cylindrical, and the pressure head, through hole, and adsorption tower end cap are coaxially arranged.

[0012] Furthermore, the lower end of the cylinder is open, and the lower opening of the cylinder is provided with a mounting flange, which is fixed to the upper surface of the adsorption tower end cover by bolts.

[0013] Furthermore, the upper surface of the cylinder is provided with a clearance opening, and the piston rod passes through the clearance opening of the cylinder.

[0014] Furthermore, the pressure distribution plate includes a horizontally arranged lower pressure plate. A tapered hole that mates with the lower pressure head is provided at the center of the upper surface of the lower pressure plate. Multiple channel steels are welded to the upper surface of the pressure distribution plate. One end of the multiple channel steels is connected to the tapered hole and arranged in a star shape. Multiple columns are provided between the channel steels. The bottom surface of the columns is welded to the upper surface of the lower pressure plate.

[0015] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0016] 1. A cylindrical section is installed between the cylinder and the adsorption tower end cover. A through hole is located at the center of the adsorption tower end cover, through which the lower pressure head can freely move up and down. A mounting flange is located at the lower opening of the cylindrical section, and the mounting flange is fixed to the upper surface of the adsorption tower end cover with bolts. This allows the cylindrical section to be easily removed from the adsorption tower end cover, thereby reducing the overall height and facilitating packing and transportation.

[0017] 2. The gas outlet pipe is located above the end cap of the adsorption tower, and the molecular sieve can be located at the top inside the adsorption tower, thereby increasing the effective nitrogen production space of the adsorption tower without changing the volume of the adsorption tower.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a front view of the present invention;

[0021] Figure 3 This is a half-sectional view of the present invention;

[0022] Figure 4 This is a schematic diagram of the pressure distribution disc in this utility model.

[0023] In the picture,

[0024] 1-Cylinder, 2-Adsorption tower, 3-Adsorption tower end cap, 301-Through hole, 4-Cylinder, 5-Outlet pipe, 6-Cylinder end cap, 7-Piston, 8-Piston rod, 9-Lower pressure head, 10-Pressure distribution plate, 1001-Lower pressure plate, 1002-Channel steel, 1003-Column, 1004-Conical hole. Detailed Implementation

[0025] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0026] like Figure 1-3 As shown, this utility model provides a pressing device for a nitrogen generator molecular sieve that is easy to disassemble, including an adsorption tower 2, an adsorption tower end cap 3 installed on the upper opening of the adsorption tower 2, and a cylinder 1 provided at the upper end of the adsorption tower end cap 3.

[0027] A cylinder 4 is provided between the cylinder 1 and the adsorption tower end cap 3. An outlet pipe 5 is provided on the side wall of the cylinder 4. A piston 7 is slidably installed inside the cylinder 1. The lower end of the piston 7 is connected to the lower pressure head 9 through the piston rod 8.

[0028] The adsorption tower end cap 3 has a through hole 301 at its center. The lower pressure head 9 can freely move up and down through the through hole 301. The top of the adsorption tower 2 is equipped with a pressure distribution plate 10, which is pressed tightly by the lower pressure head 9. The molecular sieve at its lower end is pressed tightly by the pressure distribution plate 10.

[0029] The cylinder 1 is open at both the top and bottom. The lower end of the cylinder 1 is fixed to the upper surface of the cylinder 4, and the upper end of the cylinder 1 is fixed with a cylinder end cap 6. The adsorption tower end cap 3, the cylinder 4 and the cylinder 1 are coaxially arranged.

[0030] The pressure head 9 is cylindrical, and the pressure head 9, the through hole 301, and the adsorption tower end cap 3 are coaxially arranged.

[0031] The lower end of the cylinder 4 is open, and the lower opening of the cylinder 4 is provided with a mounting flange, which is fixed to the upper surface of the adsorption tower end cover 3 by bolts.

[0032] The upper surface of the cylinder 4 is provided with a clearance opening, and the piston rod 8 passes through the clearance opening of the cylinder 4.

[0033] The pressure distribution plate 10 includes a horizontally arranged lower pressure plate 1001. A tapered hole 1004 that mates with the lower pressure head is provided at the center of the upper surface of the lower pressure plate 1001. Multiple channel steels 1002 are welded to the upper surface of the pressure distribution plate 10. One end of the multiple channel steels 1002 is connected to the tapered hole 1004 and arranged in a star shape. Multiple columns 1003 are provided between the channel steels 1002. The bottom surface of the columns 1003 is welded to the upper surface of the lower pressure plate 1001.

[0034] The specific working principle of this utility model:

[0035] A cylinder 4 is provided between the cylinder 1 and the adsorption tower end cover 3. An outlet pipe 5 is provided on the side wall of the cylinder 4. A through hole 301 is provided at the center of the adsorption tower end cover 3. A lower pressure head 9 freely inserts and exits through the through hole 301. A pressure distribution plate 10 is provided at the top inside the adsorption tower 2. The lower pressure head 9 presses the pressure distribution plate 10 tightly, thus pressing the molecular sieve at its lower end. A mounting flange is provided at the lower opening of the cylinder 4, and the mounting flange is fixed to the upper surface of the adsorption tower end cover 3 with bolts. Because the lower pressure head 9 freely inserts and exits through the through hole 301, the cylinder 4 can be easily removed from the adsorption tower end cover 3, thereby reducing the overall height and facilitating packing and transportation.

[0036] In addition, since the gas outlet pipe 5 is located above the adsorption tower end cap 3, the molecular sieve can be located at the top inside the adsorption tower 2, thereby increasing the effective nitrogen production space of the adsorption tower without changing the volume of the adsorption tower 2.

[0037] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A clamping device for a nitrogen generator molecular sieve that is easy to disassemble, characterized in that: It includes an adsorption tower (2), an adsorption tower end cap (3) is installed on the upper opening of the adsorption tower (2), and a cylinder (1) is provided at the upper end of the adsorption tower end cap (3). A cylinder (4) is provided between the cylinder (1) and the adsorption tower end cap (3). An outlet pipe (5) is provided on the side wall of the cylinder (4). A piston (7) is slidably installed inside the cylinder (1). The lower end of the piston (7) is connected to the lower pressure head (9) through the piston rod (8). The adsorption tower end cap (3) has a through hole (301) at the center. The pressure head (9) can freely move up and down through the through hole (301). The top of the adsorption tower (2) is provided with a pressure distribution plate (10). The pressure head (9) presses the pressure distribution plate (10) tightly.

2. The easily disassembled molecular sieve clamping device for a nitrogen generator as described in claim 1, characterized in that: The cylinder (1) is open at both the top and bottom. The lower end of the cylinder (1) is fixed to the upper surface of the cylinder (4). The upper end of the cylinder (1) is fixed with a cylinder end cap (6). The adsorption tower end cap (3), the cylinder (4) and the cylinder (1) are coaxially arranged.

3. The easily disassembled molecular sieve clamping device for a nitrogen generator as described in claim 1, characterized in that: The pressure head (9) is cylindrical, and the pressure head (9), through hole (301) and adsorption tower end cap (3) are coaxially arranged.

4. The easily disassembled molecular sieve clamping device for a nitrogen generator as described in claim 1, characterized in that: The lower end of the cylinder (4) is open, and the lower opening of the cylinder (4) is provided with a mounting flange, which is fixed to the upper surface of the adsorption tower end cap (3) by bolts.

5. The easily disassembled molecular sieve clamping device for a nitrogen generator as described in claim 1, characterized in that: The upper surface of the cylinder (4) is provided with a clearance opening, and the piston rod (8) passes through the clearance opening of the cylinder (4).

6. The easily disassembled molecular sieve clamping device for a nitrogen generator as described in claim 1, characterized in that: The pressure distribution plate (10) includes a horizontally arranged lower pressure plate (1001). A tapered hole (1004) that cooperates with the lower pressure head is provided at the center of the upper surface of the lower pressure plate (1001). Multiple channel steels (1002) are welded to the upper surface of the pressure distribution plate (10). One end of the multiple channel steels (1002) is connected to the tapered hole (1004) and arranged in a star shape. Multiple columns (1003) are provided between the channel steels (1002). The bottom surface of the columns (1003) is welded to the upper surface of the lower pressure plate (1001).

Images