Ventilation connecting structure of nitrogen making machine

Abstract

The utility model relates to the field of nitrogen making machines, in particular to a ventilation connection structure of a nitrogen making machine. Comprising a nitrogen making machine body and a ventilation pipe arranged on one side of the nitrogen making machine body, a ventilation hole communicated with the nitrogen making machine body is formed in one end of the ventilation pipe, an annular piston slides in the ventilation pipe, one side of the annular piston is connected with the inner wall of the ventilation pipe through a spring, and a fixing pipe is arranged on the other side of the annular piston and sleeved with a connecting pipe; a fixing ring is arranged at the input end of the connecting pipe, and two limiting assemblies matched with the fixing ring are symmetrically arranged at the other end of the breather pipe. The connecting pipe has the advantages that by arranging the annular piston, the spring, the fixing pipe and the limiting assembly, a worker can conveniently and rapidly sleeve the fixing pipe with the connecting pipe for connection, and the portability of mounting and dismounting of the connecting pipe is improved.

Description

Technical Field

[0001] The utility model relates to the field of nitrogen generators, in particular to a ventilation connection structure of a nitrogen generator. Background Art

[0002] Nitrogen is chemically inactive. It can be used to make ammonia, nitric acid, nitrates, cyanides, etc. It can form inert materials to preserve materials. It can be used as liquid nitrogen in the process of freezing food. It can be used as a coolant in the laboratory. A nitrogen generator is a device that uses air as raw material and uses physical methods to separate oxygen and nitrogen in it to obtain nitrogen. When the nitrogen generator outlet pipe is connected to the pipeline of the external equipment, it needs to be fixed with the help of tools. The installation operation is more troublesome, and tools need to be carried. If you forget to carry the tools, the pipeline cannot be connected, which will greatly affect the work efficiency. Summary of the invention

[0003] The technical problem to be solved by the utility model is that when the outlet pipe of the nitrogen generator is connected to the pipeline of the external equipment, it needs to be fixed with the help of tools, the installation operation is relatively troublesome, and the tools need to be carried. When the tools are forgotten to be carried, the pipelines cannot be connected and connected, which greatly affects the work efficiency.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a ventilation connection structure of a nitrogen generator, including a nitrogen generator body and a ventilation pipe arranged on one side of the nitrogen generator body, one end of the ventilation pipe is provided with a ventilation hole connected to the nitrogen generator body, an annular piston is slidable inside the ventilation pipe, one side of the annular piston is connected to the inner wall of the ventilation pipe through a spring, a fixed pipe is provided on the other side of the annular piston, a connecting pipe is sleeved on the outside of the fixed pipe, a fixing ring is provided on the input end of the connecting pipe, and two limit assemblies matched with the fixing ring are symmetrically provided on the other end of the ventilation pipe.

[0005] The beneficial effects of the utility model are as follows: by providing the annular piston, the spring, the fixed pipe and the limit assembly, it is convenient for workers to quickly sleeve the connecting pipe on the outside of the fixed pipe for connection, thereby improving the portability of the installation and disassembly of the connecting pipe.

[0006] As a further improvement of the utility model, the technical problem to be solved is: it is difficult to ensure the sealing of the connecting pipe after rapid installation.

[0007] In order to solve the above technical problems, the utility model further improves the technical solution adopted as follows: the limiting assembly includes a mounting frame fixedly arranged at the end of the ventilation pipe and a limiting member rotatably arranged inside the mounting frame, and the inner wall of the ventilation pipe is provided with a groove matching with the limiting member.

[0008] The beneficial effect of the above improvement is as follows: by rotating the set limit piece, when the connecting pipe needs to be connected, the staff can directly put the connecting pipe on the outside of the fixed pipe, so that the fixed ring squeezes the limit piece to deflect the limit piece, and squeezes the annular piston to gradually compress the spring, and by continuously pushing the connecting pipe, the fixed ring is pushed into the ventilation pipe, and then under the action of the spring reset, the connecting pipe is pushed to move in the opposite direction. Since the reverse deflection amplitude of the limit piece is limited, the fixed ring is prevented from sliding out of the ventilation pipe. Therefore, under the action of the spring reset, the annular piston is in close contact with the fixed ring, thereby ensuring the sealing of the connection between the annular piston and the fixed ring.

[0009] As a further improvement of the utility model, the technical problem to be solved is: it is inconvenient to disassemble the connecting pipe.

[0010] In order to solve the above technical problems, the utility model further improves and adopts the technical solution as follows: a limiting bolt for limiting the deflection of the limiting member is threadedly penetrated on the side of the top surface of the mounting frame away from the ventilation pipe.

[0011] The beneficial effect of the above improvement is: by setting a limit bolt, the limit member can be effectively prevented from deflecting in the opposite direction. When the connecting pipe needs to be disassembled, the staff can loosen the limit bolt to release the restriction on the limit member, so that the limit member can deflect in the opposite direction, so that the staff can pull the connecting pipe outward.

[0012] As a further improvement of the present invention, the technical problem to be solved is: it is difficult to meet the connection requirements of connecting pipes of different sizes.

[0013] In order to solve the above technical problems, the utility model further improves the technical solution adopted as follows: the limiting member includes a rotating plate and a sliding sleeve arranged at the lower end of the rotating plate, the rotating plate is hingedly matched with the mounting frame through a hinge shaft, and a positioning bolt is passed through the outer thread of the sliding sleeve.

[0014] The beneficial effect of the above improvement is that through the mutual cooperation of the rotating plate, the sliding sleeve and the positioning bolt, it is easy to adjust the length of the limit member, thereby meeting the blocking and limiting of fixing rings with different outer diameters, that is, meeting the installation and connection of connecting pipes with different outer diameters.

[0015] The utility model further improves the technical solution adopted as follows: a sealing gasket is arranged between the fixing ring and the annular piston, and an annular placement groove for placing the sealing gasket is opened on one side of the fixing ring.

[0016] The beneficial effect of the above improvement is that the sealing performance of the connection between the annular piston and the fixing ring is further ensured by providing a sealing gasket.

[0017] The utility model further improves the technical solution adopted as follows: the number of the springs is multiple and distributed in a ring array.

[0018] The beneficial effect of the above improvement is that by providing a plurality of springs, the annular piston can tightly press the sealing gasket under the action of the spring reset, thereby ensuring the sealing of the connection between the annular piston and the fixing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall appearance of the nitrogen generator;

[0020] Figure 2 This is a schematic diagram of the appearance of the ventilation connection structure;

[0021] Figure 3 It is a cross-sectional view of the ventilation connection structure;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0023] The text markings in the figure are as follows: 1. nitrogen generator body; 2. ventilation pipe; 3. mounting frame; 4. rotating plate; 5. sliding sleeve; 6. connecting pipe; 7. fixing ring; 8. sealing gasket; 9. annular piston; 10. spring; 11. ventilation hole; 12. fixing pipe; 13. limiting bolt; 14. positioning bolt; 15. groove. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0025] like Figure 1-4 As shown, a ventilation connection structure of a nitrogen generator includes a nitrogen generator body 1 and a ventilation pipe 2 arranged on one side of the nitrogen generator body 1, one end of the ventilation pipe 2 is provided with a ventilation hole 11 connected to the nitrogen generator body 1, an annular piston 9 is slid inside the ventilation pipe 2, one side of the annular piston 9 is connected to the inner wall of the ventilation pipe 2 through a spring 10, and a fixed pipe 12 is provided on the other side of the annular piston 9. A connecting pipe 6 is sleeved on the outside of the fixed pipe 12, and a fixing ring 7 is provided on the input end of the connecting pipe 6. Two limit assemblies that match the fixing ring 7 are symmetrically provided on the other end of the ventilation pipe 2. By providing the annular piston 9, the spring 10, the fixing pipe 12 and the limiting assembly, it is convenient for the staff to quickly sleeve the connecting pipe 6 on the outside of the fixing pipe 12 for connection, thereby improving the portability of the installation and disassembly of the connecting pipe 6.

[0026] The limit assembly includes a mounting frame 3 fixedly arranged at the end of the vent pipe 2 and a limit piece rotatably arranged inside the mounting frame 3, and a groove matched with the limit piece is provided on the inner wall of the vent pipe 2. Through the rotatably arranged limit piece, when the connecting pipe 6 needs to be connected, the staff can directly sleeve the connecting pipe 6 on the outside of the fixed pipe 12, so that the fixed ring 7 squeezes the limit piece to deflect the limit piece, and squeezes the annular piston 9 to gradually compress the spring 10, and the fixing ring 7 is pushed into the vent pipe 2 by continuously pushing the connecting pipe 6, and then the connecting pipe 6 is pushed to move in the reverse direction under the reset action of the spring 10. Since the reverse deflection amplitude of the limit piece is limited, the fixing ring 7 is prevented from sliding out of the vent pipe 2. Therefore, under the reset action of the spring 10, the annular piston 9 is in close contact with the fixing ring 7 to ensure the sealing of the connection between the annular piston 9 and the fixing ring 7.

[0027] A limiting bolt 13 for limiting the deflection of the limiting member is threadedly penetrated on the top surface of the mounting frame 3 away from the vent pipe 2. The limiting bolt 13 is provided to effectively prevent the limiting member from deflecting in the opposite direction. When the connecting pipe 6 needs to be disassembled, the staff can loosen the limiting bolt 13 to release the restriction on the limiting member, so that the limiting member can deflect in the opposite direction, and the staff can pull the connecting pipe 6 outward.

[0028] The position-limiting member includes a rotating plate 4 and a sliding sleeve 5 which is slidably mounted on the lower end of the rotating plate 4. The rotating plate 4 is hingedly coupled with the mounting frame 3 via a hinge shaft, and a positioning bolt 14 is threadedly penetrated through the outer side of the sliding sleeve 5. Through the mutual cooperation of the rotating plate 4, the sliding sleeve 5 and the positioning bolt 14, it is convenient to adjust the length of the position-limiting member, thereby meeting the requirements of blocking and limiting the fixing rings 7 with different outer diameters, that is, meeting the requirements of installing and connecting the connecting pipes 6 with different outer diameters.

[0029] A sealing gasket 8 is provided between the fixing ring 7 and the annular piston 9, and an annular placement groove for placing the sealing gasket 8 is provided on one side of the fixing ring 7. By providing the sealing gasket 8, the sealing property of the connection between the annular piston 9 and the fixing ring 7 is further ensured.

[0030] The number of springs 10 is multiple and distributed in an annular array. By providing multiple springs 10, the annular piston 9 can tightly press the sealing gasket 8 under the reset action of the springs 10, thereby ensuring the sealing of the connection between the annular piston 9 and the fixing ring 7.

[0031] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0032] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A ventilation connection structure of a nitrogen generator, characterized in that: The invention comprises a nitrogen generator body (1) and a vent pipe (2) arranged at one side of the nitrogen generator body (1); a vent hole (11) connected to the nitrogen generator body (1) is arranged at one end of the vent pipe (2); an annular piston (9) is slidably disposed inside the vent pipe (2); one side of the annular piston (9) is connected to the inner wall of the vent pipe (2) via a spring (10); a fixing pipe (12) is arranged at the other side of the annular piston (9); a connecting pipe (6) is sleeved on the outer side of the fixing pipe (12); a fixing ring (7) is arranged at the input end of the connecting pipe (6); and two limiter components cooperating with the fixing ring (7) are symmetrically arranged at the other end of the vent pipe (2).

2. The ventilation connection structure of a nitrogen generator according to claim 1, characterized in that: The limiting assembly comprises a mounting frame (3) fixedly arranged at the end of the ventilation pipe (2) and a limiting member rotatably arranged inside the mounting frame (3); the inner wall of the ventilation pipe (2) is provided with a groove matching the limiting member.

3. The ventilation connection structure of a nitrogen generator according to claim 2, characterized in that: A limiting bolt (13) for limiting the deflection of the limiting member is threadedly penetrated on the side of the top surface of the mounting frame (3) away from the ventilation pipe (2).

4. The ventilation connection structure of a nitrogen generator according to claim 2, characterized in that: The position-limiting member comprises a rotating plate (4) and a sliding sleeve (5) which is arranged at the lower end of the rotating plate (4); the rotating plate (4) is hingedly connected to the mounting frame (3) via a hinge shaft; and a positioning bolt (14) is threadedly penetrated on the outer side of the sliding sleeve (5).

5. The ventilation connection structure of a nitrogen generator according to claim 1, characterized in that: A sealing gasket (8) is arranged between the fixing ring (7) and the annular piston (9), and an annular placement groove for placing the sealing gasket (8) is provided on one side of the fixing ring (7).

6. The ventilation connection structure of a nitrogen generator according to claim 1, characterized in that: The springs (10) are multiple in number and distributed in an annular array.

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