High-purity nitrogen generator

Abstract

The invention discloses a high-purity nitrogen generator, and belongs to the technical field of nitrogen generators. A high-purity nitrogen generator comprises a tower body, a filtering structure is movably arranged in the middle of the tower body, the tower body comprises a lower tower body and an upper tower body located above the lower tower body, the lower tower body and the upper tower body are connected through a connecting structure, and the filtering structure is located between the lower tower body and the upper tower body. The filtering structure comprises two hinged frames which are horizontally and symmetrically arranged, carbon molecular sieve columns are detachably mounted at the upper ends and the lower ends of the interiors of the hinged frames, the hinged frames are rotationally connected with the tower body through connecting structures in the horizontal direction, and the hinged frames are rotationally connected with the connecting structures in the vertical direction; the device has the advantages that the carbon molecular sieve column is convenient to replace, and the downtime during replacement of the carbon molecular sieve column is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen generators, and in particular to a high-purity nitrogen generator. Background Art

[0002] A nitrogen generator is a gas replacement device, which generally uses a tower body. The tower body is connected to an air inlet pipe and an exhaust pipe. A carbon molecular sieve column is arranged in the tower body. Air is introduced into the air inlet pipe, and gases such as oxygen and carbon dioxide in the air are adsorbed by the carbon molecular sieve column, so that nitrogen is discharged from the exhaust pipe.

[0003] In the utility model patent document with announcement number CN215974970U, a nitrogen generator for atmospheric pressure replacement of tower equipment is disclosed, including an upper tower body, a lower tower body and a connecting pipe, the upper tower body and the lower tower body are connected by a connecting pipe, the lower tower body is connected with an air inlet pipe, the upper tower body is connected with an exhaust pipe, the connecting pipe is connected to the upper tower body and the lower tower body in a detachable manner, the lower tower body is detachably connected with a first carbon molecular sieve column, the first carbon molecular sieve column is located above the air inlet pipe, the edge of the first carbon molecular sieve column abuts against the inner wall of the lower tower body, the upper tower body is detachably connected with a second carbon molecular sieve column, the tower equipment atmospheric pressure replacement nitrogen generator, when the first carbon molecular sieve column is saturated with adsorption, the oxygen and carbon dioxide passing through the first carbon molecular sieve column will continue to be adsorbed by the second carbon molecular sieve column when flowing upward, and the oxygen and carbon dioxide will not be immediately mixed with the prepared nitrogen through the second carbon molecular sieve column.

[0004] However, in the above solution, when the first carbon molecular sieve column and the second carbon molecular sieve column are replaced, the second carbon molecular sieve column needs to be installed and fixed upward, which is difficult to install and needs to be improved. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the second molecular sieve column in the nitrogen generator in the prior art is difficult to install, and to propose a high-purity nitrogen generator.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A high-purity nitrogen generator comprises a tower body, wherein a filtering structure is arranged in the middle of the tower body, the tower body comprises a lower tower body and an upper tower body located above the lower tower body, the lower tower body and the upper tower body are connected by a connecting structure, and the filtering structure is located between the lower tower body and the upper tower body; The filtering structure includes two horizontally symmetrically arranged hinged frames, wherein carbon molecular sieve columns are detachably installed at the upper and lower ends of the hinged frames, the hinged frames are rotationally connected to the tower body in the horizontal direction via a connecting structure, and the hinged frames are rotationally connected to the connecting structure in the vertical direction.

[0007] Furthermore, the connection structure includes a screw seat, an articulated seat, a second articulated shaft, and a rotating shaft sleeve. The screw seat and the articulated seat are respectively located at two ends of the tower body, and the top and bottom ends of the screw seat and the articulated seat are respectively connected to the upper tower body and the lower tower body; A second hinge shaft is arranged on the inner side of the hinge seat, and the hinge frame is rotatably mounted on the hinge seat through the cooperation of the second hinge shaft and a rotating shaft sleeve.

[0008] Furthermore, a first hinge shaft is provided at one end of the hinge frame close to the hinge seat, and the hinge frame and the rotating shaft sleeve are rotatably connected via the first hinge shaft.

[0009] Furthermore, a screw plate corresponding to the screw seat is provided at one end of the hinge frame away from the hinge seat.

[0010] Furthermore, ventilation pipes connected to the carbon molecular sieve column are respectively installed in the lower tower body and the upper tower body, and the ventilation pipes include a first pipe, a three-way valve, a first connecting channel, and a second connecting channel connected in sequence, and the end of the second connecting channel away from the first connecting channel is sealed and connected to the carbon molecular sieve column.

[0011] Furthermore, a hose groove is provided on the end surface of the second connecting channel close to the carbon molecular sieve column, and an inflation hose is provided inside the hose groove, and the inflation hose is connected to an external gas source.

[0012] Furthermore, a mounting frame is provided in the middle of the inner side of the hinged frame; A molecular sieve fixing frame is arranged between the hinge frame and the carbon molecular sieve column, the carbon molecular sieve column is fixedly connected to the molecular sieve fixing frame, and the molecular sieve fixing frame is screwed to the installation frame.

[0013] Furthermore, an oxygen concentration detector is arranged inside the installation frame.

[0014] Furthermore, a carbon dioxide concentration detector is arranged on the inner side of the installation frame.

[0015] Compared with the prior art, the present invention provides a high-purity nitrogen generator, which has the following beneficial effects: The invention discloses a high-purity nitrogen generator. When in use, air is introduced from a lower tower body, and after being filtered by a carbon molecular sieve column, nitrogen is discharged from an upper tower body. When the carbon molecular sieve column needs to be replaced, the hinged frame is first rotated 180 degrees in the horizontal direction to the outside of the tower body, and then a carbon molecular sieve column located at the top of the hinged frame is removed, and then the hinged frame is rotated 180 degrees in the vertical direction to a flipped state, and the carbon molecular sieve column originally located at the bottom is rotated to the top, and then the molecular sieve column is replaced, thereby reducing the difficulty of replacing the carbon molecular sieve column. When one of the carbon molecular sieve columns is replaced, the carbon molecular sieve column in another hinged frame can be activated, thereby reducing the downtime during the replacement process and ensuring production efficiency.

[0016] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention from an upper right perspective; Figure 2 It is a schematic diagram of the overall structure of the present invention from an upper left perspective; Figure 3 This is a schematic diagram of the unfolding effect of the hinged frame of the present invention; Figure 4 It is a schematic diagram of the flipping effect of the hinged frame of the present invention; Figure 5 It is a schematic diagram of the filtering structure and the ventilation structure of the present invention from the upper right perspective; Figure 6 It is a schematic diagram of the filtering structure and the ventilation structure of the present invention from the lower right perspective; Figure 7 The upper right schematic diagram of the explosion effect of the filtering structure of the present invention; Figure 8 It is a schematic diagram of the first hinge shaft structure of the present invention.

[0018] In the figure: 1. Tower body; 101. Lower tower body; 102. Upper tower body; 2. Filtration structure; 201. Articulated frame; 202. Carbon molecular sieve column; 203. Molecular sieve fixing frame; 204. Screwed plate; 205. Mounting frame; 206. Oxygen concentration detector; 207. Carbon dioxide concentration detector; 208. First hinge axis; 3. Ventilation duct; 301. First duct; 302. Three-way valve; 303. First connecting channel; 304. Second connecting channel; 305. Inflatable hose; 306. Hose groove; 4. Connection structure; 401. Screwed seat; 402. Articulated seat; 403. Second hinge axis; 404. Rotating sleeve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-8The present invention discloses a high-purity nitrogen generator, comprising a tower body 1. The tower body 1 in the present application is a cylindrical tower body. A filtering structure 2 is movably installed in the middle of the tower body 1. The tower body 1 comprises a lower tower body 101 and an upper tower body 102 located above the lower tower body 101. The lower tower body 101 and the upper tower body 102 are fixedly connected by a connecting structure 4. The filtering structure 2 is located between the lower tower body 101 and the upper tower body 102. Among them, the filtering structure 2 includes two horizontally symmetrically arranged hinged frames 201, the hinged frame 201 is a connecting structure that penetrates from top to bottom, the hinged frame 201 is a semicircular structure, and the two hinged frames 201 are spliced ​​into a cylindrical structure corresponding to the size of the tower body 1, and the symmetry axis of the two hinged frames 201 is a diameter of the tower body 1 in the horizontal direction.

[0021] The upper and lower ends of the hinged frame 201 are detachably installed with carbon molecular sieve columns 202, that is, there are a total of four carbon molecular sieve columns 202 in the present application. The hinged frame 201 is connected to the tower body 1 in a horizontal direction through a connecting structure 4. When the hinged frame 201 rotates horizontally, it is used to enter and exit the tower body 1. The hinged frame 201 is connected to the connecting structure 4 in a vertical direction. When the hinged frame 201 rotates vertically, it is used to flip the hinged frame 201 up and down.

[0022] The connection structure 4 includes an articulated seat 402, a second articulated shaft 403, and a rotating shaft sleeve 404. The screw seat 401 and the articulated seat 402 are respectively located at both ends of the tower body 1. The top and bottom ends of the screw seat 401 and the articulated seat 402 are respectively connected to the upper tower body 102 and the lower tower body 101. The upper tower body 102 and the lower tower body 101 are fixedly connected together through the screw seat 401 and the articulated seat 402. A second hinge shaft 403 is welded to the inner side of the hinge seat 402, and a rotating shaft sleeve 404 is mounted on the surface of the second hinge shaft 403. The hinge frame 201 is rotatably mounted on the hinge seat 402 through the cooperation of the second hinge shaft 403 and the rotating shaft sleeve 404, so that the hinge frame 201 and the rotating shaft sleeve 404 can rotate in the horizontal direction.

[0023] A first hinge shaft 208 is welded to one end of the hinge frame 201 close to the hinge seat 402 , and the hinge frame 201 and the shaft sleeve 404 are rotatably connected via the first hinge shaft 208 , so that the hinge frame 201 can rotate up and down around the first hinge shaft 208 and flip over.

[0024] The connection structure 4 also includes a screw seat 401. A screw plate 204 corresponding to the screw seat 401 is provided at one end of the hinge frame 201 away from the hinge seat 402. When the hinge frame 201 is rotated horizontally back into the tower body 1, the screw plate 204 docks with the screw seat 401 and is connected together using bolts.

[0025] A ventilation pipe 3 connected to the carbon molecular sieve column 202 is installed in the lower tower body 101 and the upper tower body 102 respectively. The ventilation pipe 3 includes a first pipe 301, a three-way valve 302, a first connecting channel 303, and a second connecting channel 304 connected in sequence. The end of the second connecting channel 304 away from the first connecting channel 303 is sealed and connected to the carbon molecular sieve column 202.

[0026] The three-way valve is used to adjust the connectivity between the two hinged frames 201. When the carbon molecular sieve column 202 is replaced in one of the hinged frames 201, the carbon molecular sieve column 202 in the other hinged frame 201 is activated, thereby reducing the downtime of the generator when replacing the carbon molecular sieve column 202.

[0027] The ventilation pipe 3 located in the lower tower body 101 is as follows Figure 5-6 As shown, it is used for taking in air, while the ventilation pipe 3 in the upper tower body 102 and the ventilation pipe 3 in the lower tower body 101 are symmetrical about the filtering structure 2 and are used for discharging nitrogen.

[0028] A hose groove 306 is processed on the end face of the second connecting channel 304 close to the carbon molecular sieve column 202, and an inflation hose 305 is arranged inside the hose groove 306. The inflation hose 305 is connected to the external gas source. When the carbon molecular sieve column 202 is docked with the second connecting channel 304, air is inflated into the inflation hose 305 to block the gap between the molecular sieve fixing frame 203 and the second connecting channel 304 for sealing and preventing air leakage. When the hinged frame 201 needs to be rotated, the inflation hose 305 is first deflated and stored in the hose groove 306, and then the hinged frame 201 is rotated.

[0029] The middle of the inner side of the hinged frame 201 is fixedly connected with a mounting frame 205, and the top view interface shape of the mounting frame 205 corresponds to the molecular sieve fixing frame 203; A molecular sieve fixing frame 203 is designed between the hinged frame 201 and the carbon molecular sieve column 202, the carbon molecular sieve column 202 is fixedly connected to the molecular sieve fixing frame 203, and the molecular sieve fixing frame 203 is screwed to the installation frame 205, so as to fix the carbon molecular sieve column 202 in the hinged frame 201 and realize a detachable connection.

[0030] An oxygen concentration detector 206 is installed inside the installation frame 205 for detecting the concentration of oxygen in the nitrogen filtered by the carbon molecular sieve column 202 located at the bottom of the hinged frame 201 .

[0031] A carbon dioxide concentration detector 207 is provided inside the mounting frame 205 for detecting the concentration of carbon dioxide in the nitrogen filtered through the carbon molecular sieve column 202 at the bottom of the hinged frame 201. The oxygen concentration detector 206 and the carbon dioxide concentration detector 207 are connected to an external controller.

[0032] Working principle: When in use, the first pipe 301 at the bottom is connected to the external air source, and the air after dust filtration is introduced. The air enters the inner side of the corresponding hinged frame 201 through the three-way valve 302, and after being filtered by the carbon molecular sieve column 202 at the bottom of the hinged frame 201, the nitrogen enters the installation frame 205, and after being detected by the oxygen concentration detector 206 and the carbon dioxide concentration detector 207, it is discharged from the carbon molecular sieve column 202 at the top of the hinged frame 201, enters the ventilation pipe 3 in the upper tower body 102, passes through the second connecting channel 304, the first connecting channel 303, and the three-way valve 302, and is discharged from the first pipe 301 on the upper tower body 102; When one of the carbon molecular sieve columns 202 needs to be replaced, first adjust the two three-way valves 302 to connect the first pipeline 301 with the other hinged frame 201, then open the hinged frame 201 corresponding to the carbon molecular sieve column 202 to be replaced, first rotate the hinged frame 201 horizontally to 180 degrees, then remove the carbon molecular sieve column 202 located at the top of the hinged frame 201, and then rotate the hinged frame 201 vertically to 180 degrees to move the carbon molecular sieve column 202 originally located at the bottom of the hinged frame 201 to the top. position, then remove the carbon molecular sieve column 202, install the first removed carbon molecular sieve column 202, replace the carbon molecular sieve column 202 that needs to be replaced, and then rotate it 180 degrees in the vertical direction to the initial orientation of the hinged frame 201, then install a new carbon molecular sieve column 202 to the top position in the hinged frame 201, replace the carbon molecular sieve column 202 originally located at the top, and finally, rotate the hinged frame 201 180 degrees in the horizontal direction to the inside of the tower body 1, and fix the screw plate 204 and the screw seat 401.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high-purity nitrogen generator, comprising a tower body (1), wherein a filtering structure (2) is provided in the middle of the tower body (1), characterized in that: The tower body (1) comprises a lower tower body (101) and an upper tower body (102) located above the lower tower body (101), the lower tower body (101) and the upper tower body (102) being connected via a connecting structure (4), and the filtering structure (2) being located between the lower tower body (101) and the upper tower body (102); The filtering structure (2) comprises two horizontally symmetrically arranged hinged frames (201), wherein the upper and lower ends of the hinged frames (201) are detachably mounted with carbon molecular sieve columns (202), and the hinged frames (201) are rotationally connected to the tower body (1) in a horizontal direction via a connecting structure (4), and the hinged frames (201) are rotationally connected to the connecting structure (4) in a vertical direction.

2. A high-purity nitrogen generator according to claim 1, characterized in that: The connection structure (4) comprises a screw seat (401), an articulated seat (402), a second articulated shaft (403), and a rotating shaft sleeve (404); the screw seat (401) and the articulated seat (402) are respectively located at two ends of the tower body (1); the top end and the bottom end of the screw seat (401) and the articulated seat (402) are respectively connected to the upper tower body (102) and the lower tower body (101); A second hinge shaft (403) is provided on the inner side of the hinge seat (402), and the hinge frame (201) is rotatably mounted on the hinge seat (402) through the cooperation of the second hinge shaft (403) and a rotating shaft sleeve (404).

3. A high-purity nitrogen generator according to claim 2, characterized in that: A first hinge shaft (208) is provided at one end of the hinge frame (201) close to the hinge seat (402), and the hinge frame (201) and the rotating shaft sleeve (404) are rotatably connected via the first hinge shaft (208).

4. A high-purity nitrogen generator according to claim 2, characterized in that: One end of the hinged frame (201) away from the hinged seat (402) is provided with a screw plate (204) corresponding to the screw seat (401).

5. A high-purity nitrogen generator according to claim 1, characterized in that: A ventilation pipe (3) connected to the carbon molecular sieve column (202) is installed in the lower tower body (101) and the upper tower body (102), respectively. The ventilation pipe (3) comprises a first pipe (301), a three-way valve (302), a first connecting channel (303), and a second connecting channel (304) which are connected in sequence. An end of the second connecting channel (304) away from the first connecting channel (303) is sealed and connected to the carbon molecular sieve column (202).

6. A high-purity nitrogen generator according to claim 5, characterized in that: A hose groove (306) is provided on the end surface of the second connecting channel (304) close to the carbon molecular sieve column (202), and an inflation hose (305) is provided inside the hose groove (306), and the inflation hose (305) is connected to an external gas source.

7. A high-purity nitrogen generator according to claim 1, characterized in that: A mounting frame (205) is provided in the middle of the inner side of the hinged frame (201); A molecular sieve fixing frame (203) is provided between the hinged frame (201) and the carbon molecular sieve column (202); the carbon molecular sieve column (202) and the molecular sieve fixing frame (203) are fixedly connected; and the molecular sieve fixing frame (203) and the installation frame (205) are screwed together.

8. A high-purity nitrogen generator according to claim 7, characterized in that: An oxygen concentration detector (206) is provided inside the installation frame (205).

9. A high-purity nitrogen generator according to claim 7, characterized in that: A carbon dioxide concentration detector (207) is provided inside the installation frame (205).

Images