Nitrogen flow control structure

Abstract

The utility model relates to the technical field of gas flow control, and discloses a nitrogen flow control structure. The nitrogen flow control structure comprises a limiting pipe, a connecting hole is formed in the outer side of the limiting pipe, flanges are fixedly installed at the two ends of the limiting pipe, a connecting frame is fixedly installed on the left side of the limiting pipe, an air pump is fixedly installed in the connecting frame, and a connecting pipe is fixedly installed on the right side of the air pump; an electromagnetic valve is fixedly installed at the right end of the connecting pipe, an air inlet pipe is fixedly installed on the right side of the electromagnetic valve, the air bag is tubular, the outer wall of the air bag makes contact with the inner wall of the limiting pipe, and when the air bag is inflated and expands, the outer diameter can be limited by the limiting pipe, so that the air bag expands inwards, and the inner diameter is reduced; due to the fact that the expansion degree of the air bag is linearly changed under the influence of the inflation volume and is in direct proportion to the inflation volume, the volume of air in the air bag is controlled through the electromagnetic valve, and therefore the effect of accurately controlling the nitrogen flow is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas flow control, in particular to a nitrogen gas flow control structure. Background Technique

[0002] In the steel-making process, nitrogen is usually used to increase the hardness, strength and wear resistance of steel. Specifically, the addition of nitrogen can cause the carbon, nitrogen and oxygen atoms in the steel to interact with each other to form nitrides, thereby increasing the hardness, strength and wear resistance of the steel. In addition, nitrogen can also improve the corrosion resistance of steel and make it have higher chemical stability.

[0003] The existing Chinese utility model patent with the reference publication number of CN219772170U discloses a sealed nitrogen gas flow control device for a converter's thick and fine ash conveying system, including a ball valve arranged on the nitrogen gas pipe. The nitrogen gas pipe is connected to the thick and fine ash conveyor through an inlet flange, and an orifice plate is also installed at the inlet flange. The orifice plate has multiple specifications with different hole diameters, and an inspection hole is also provided at one end of the thick and fine ash conveyor connected to the nitrogen gas pipe. The installation of this device is convenient and the production is simple. It can be replaced only during the normal production cycle of the converter. The required nitrogen gas volume can select orifice plates with different hole diameters according to actual requirements, and the flow rate adjustment is simple.

[0004] The existing flow control structure generally adjusts by adding an orifice plate inside the pipeline. This method cannot adjust while keeping the nitrogen gas flowing, and the nitrogen gas supply needs to be cut off before adjustment to avoid nitrogen gas leakage during adjustment. At the same time, due to the influence of the orifice diameter specifications, this method cannot accurately control the flow rate. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a nitrogen gas flow control structure, which has the advantages of being able to adjust the nitrogen gas flow rate without cutting off the nitrogen gas transportation and being able to accurately control the flow rate, and solves the above technical problems.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solutions: A nitrogen gas flow control structure, comprising: a limiting tube, a connection hole is provided on the outer side of the limiting tube, flanges are fixedly installed at both ends of the limiting tube, a connection frame is fixedly installed on the left side of the limiting tube, an air pump is fixedly installed inside the connection frame, a connection tube is fixedly installed on the right side of the air pump, a solenoid valve is fixedly installed at the right end of the connection tube, an intake pipe is fixedly installed on the right side of the solenoid valve, an airbag is connected to the right side of the intake pipe, an exhaust pipe is fixedly installed above the airbag, a silica gel tube is inserted and installed inside the airbag, and a flow guiding ring is fixedly installed at the front end of the silica gel tube; the limiting tube can limit the position of the airbag.

[0009] As a preferred technical solution of the present utility model, the connection holes are provided above and on the left side of the limiting tube, the connection frames are symmetrically arranged on the front and rear sides of the air pump with the center of the air pump as the reference, and the air pump is fixedly connected to the limiting tube through the connection frames; the connection frames can limit the position of the air pump.

[0010] As a preferred technical solution of the present utility model, the air pump is communicated with the solenoid valve through the connection tube, and the intake pipe is fixedly connected to the limiting tube through the connection hole on the left side of the limiting tube; the air pump can deliver air to the airbag.

[0011] As a preferred technical solution of the present utility model, the intake pipe and the exhaust pipe are of a tee structure, the intake pipe, the exhaust pipe and the inner cavity of the airbag are communicated, the airbag is communicated with the air pump through the intake pipe, and the airbag is of a tubular structure; the airbag can facilitate the adjustment of the inner diameter of the silica gel tube.

[0012] As a preferred technical solution of the present utility model, the outer side of the airbag is fixedly connected to the inner wall of the limiting tube, the exhaust pipe is fixedly connected to the limiting tube through the connection hole above the limiting tube, and a solenoid valve is also installed at the top end of the exhaust pipe; the solenoid valve can limit the passage of gas.

[0013] As a preferred technical solution of the present utility model, the outer diameters of the front and rear ends of the silica gel tube are the same as the inner diameter of the limiting tube, the central outer diameter of the silica gel tube is the same as the inner diameter of the airbag, and the front and rear ends of the silica gel tube are in a trumpet shape; the silica gel tube can facilitate the adjustment of the gas flow rate.

[0014] As a preferred technical solution of the present utility model, the flow guiding rings are symmetrically installed on the front and rear sides of the silica gel tube in a front-back mirror image, a slope structure is provided inside one side of the flow guiding ring, and the outer side of the flow guiding ring is fixedly connected to the limiting tube; the flow guiding ring can facilitate the entry of nitrogen gas into the silica gel tube.

[0015] Compared with the prior art, the present utility model provides a nitrogen gas flow control structure, which has the following

[0016] Beneficial effects:

[0017] 1. Through the setting of the air pump in the present utility model, the air pump is fixedly connected to the limit pipe through a connecting frame, communicates with the solenoid valve through a connecting pipe, the intake pipe is fixedly connected to the limit pipe through a connecting hole on the left side of the limit pipe, and the end of the intake pipe penetrates through the limit pipe and communicates with the airbag. When the solenoid valve between the connecting pipe and the intake pipe is opened, the air pump can deliver air into the airbag, causing the airbag to expand. Since the airbag is tubular and the outer side of the airbag contacts the inner side of the limit pipe, the airbag can only expand inward. The outer diameters of the front and rear ends of the silica gel tube are the same as the inner diameter of the limit pipe, the central outer diameter of the silica gel tube is the same as the inner diameter of the airbag, and the front and rear ends of the silica gel tube are in a horn shape. The silica gel tube is inserted into the interior of the airbag, and the flow guiding rings are symmetrically installed mirror-image in the front and rear of the silica gel tube, and the outer side surface of the flow guiding ring is fixedly connected to the limit pipe. When the airbag expands inward, it will squeeze the silica gel tube, causing the silica gel tube to deform and the inner diameter to decrease, so as to adjust the nitrogen flow rate without cutting off the nitrogen delivery.

[0018] 2. Through the setting of the airbag in the present utility model, the airbag is tubular, and the outer wall of the airbag contacts the inner wall of the limit pipe. When the airbag is inflated and expands, the outer diameter will be restricted by the limit pipe, causing the airbag to expand inward and reduce the inner diameter. Since the expansion degree of the airbag is linearly changed and is proportional to the inflation amount, the solenoid valve is used to control the gas volume inside the airbag, so as to achieve the effect of accurately controlling the nitrogen flow rate. Description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the connection structure between the air pump and the limit pipe of the present utility model;

[0021] Figure 3 It is a schematic diagram of the connection structure between the air pump and the airbag of the present utility model;

[0022] Figure 4 It is a schematic diagram of the sectional structure of the limit pipe of the present utility model;

[0023] Among them: 1. Limit pipe; 11. Connection hole; 12. Flange; 13. Connecting frame; 14. Air pump; 15. Connecting pipe; 16. Solenoid valve; 17. Intake pipe; 18. Airbag; 19. Exhaust pipe; 110. Silica gel tube; 111. Flow guiding ring. Specific embodiments

[0024] The following further describes in detail the embodiments of the present utility model with reference to the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0025] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Please refer to Figure 1 - Figure 4 In this embodiment, a nitrogen flow control structure includes: a limit tube 1, a connection hole 11 is arranged on the outer side of the limit tube 1, flanges 12 are fixedly installed at both ends of the limit tube 1, a connection frame 13 is fixedly installed on the left side of the limit tube 1, an air pump 14 is fixedly installed inside the connection frame 13, a connection tube 15 is fixedly installed on the right side of the air pump 14, a solenoid valve 16 is fixedly installed at the right end of the connection tube 15, an intake pipe 17 is fixedly installed on the right side of the solenoid valve 16, an airbag 18 is connected to the right side of the intake pipe 17, an exhaust pipe 19 is fixedly installed above the airbag 18, a silica gel tube 110 is inserted and installed inside the airbag 18, and a flow guiding ring 111 is fixedly installed at the front end of the silica gel tube 110.

[0028] The connection hole 11 is arranged above and on the left side of the limit tube 1, the connection frame 13 is symmetrically arranged on the front and rear sides of the air pump 14 with the center of the air pump 14 as the reference, and the air pump 14 is fixedly connected to the limit tube 1 through the connection frame 13.

[0029] The air pump 14 is communicated with the solenoid valve 16 through the connection tube 15, and the intake pipe 17 is fixedly connected to the limit tube 1 through the connection hole 11 on the left side of the limit tube 1.

[0030] The intake pipe 17 and the exhaust pipe 19 have a tee structure, the intake pipe 17, the exhaust pipe 19 are communicated with the inner cavity of the airbag 18, the airbag 18 is communicated with the air pump 14 through the intake pipe 17, and the airbag 18 is a tubular structure.

[0031] The outer side surface of the airbag 18 is fixedly connected to the inner wall of the limit tube 1. The exhaust pipe 19 is fixedly connected to the limit tube 1 through the connection hole 11 above the limit tube 1, and a solenoid valve 16 is also installed at the top end of the exhaust pipe 19.

[0032] The outer diameters of the front and rear ends of the silica gel tube 110 are the same as the inner diameter of the limit tube 1, the central outer diameter of the silica gel tube 110 is the same as the inner diameter of the airbag 18, and the front and rear ends of the silica gel tube 110 are in a flared shape.

[0033] The flow guide rings 111 are symmetrically installed in the front and rear of the silica gel tube 110 in a mirror image. A slope structure is provided inside one side of the flow guide ring 111, and the outer side surface of the flow guide ring 111 is fixedly connected to the limit tube 1.

[0034] Specifically, the limit tube 1 can limit the position of the airbag 18, the connection hole 11 can facilitate the installation of the intake pipe 17 and the exhaust pipe 19, the flange 12 can facilitate the installation of the limit tube 1 on the nitrogen delivery pipeline, the connection frame 13 can limit the position of the air pump 14, the air pump 14 can deliver air to the airbag 18, the connecting pipe 15 can facilitate the connection between the air pump 14 and the intake pipe 17, the solenoid valve 16 can limit the passage of gas, the intake pipe 17 can facilitate the entry of air into the airbag 18, the airbag 18 can facilitate the adjustment of the inner diameter of the silica gel tube 110, the exhaust pipe 19 can facilitate the discharge of the gas inside the airbag 18, the silica gel tube 110 can facilitate the adjustment of the gas flow rate, and the flow guide ring 111 can facilitate the entry of nitrogen into the silica gel tube 110.

[0035] During use, the air pump 14 is fixedly connected to the limit tube 1 through the connecting frame 13, and is communicated with the solenoid valve 16 through the connecting tube 15. The intake pipe 17 is fixedly connected to the limit tube 1 through the connecting hole 11 on the left side of the limit tube 1. The end of the intake pipe 17 penetrates through the limit tube 1 and is communicated with the airbag 18. When the solenoid valve 16 between the connecting tube 15 and the intake pipe 17 is opened, the air pump 14 can deliver air into the airbag 18, so that the airbag 18 expands. Since the airbag 18 is tubular and the outer side of the airbag 18 contacts the inner side of the limit tube 1, the airbag 18 can only expand inward. The outer diameters of the front and rear ends of the silica gel tube 110 are the same as the inner diameter of the limit tube 1, the central outer diameter of the silica gel tube 110 is the same as the inner diameter of the airbag 18, and the front and rear ends of the silica gel tube 110 are in a horn shape. The silica gel tube 110 is inserted into the airbag 18. The flow guide rings 111 are symmetrically installed mirror-image front and back at the front and rear ends of the silica gel tube 110, and the outer side surfaces of the flow guide rings 111 are fixedly connected to the limit tube 1. When the airbag 18 expands inward, it will squeeze the silica gel tube 110, causing the silica gel tube 110 to deform and the inner diameter to decrease, so as to adjust the nitrogen flow rate without cutting off the nitrogen delivery. The airbag 18 is tubular, and the outer wall of the airbag 18 contacts the inner wall of the limit tube 1. When the airbag 18 is inflated and expanded, the outer diameter will be restricted by the limit tube 1, so that the airbag 18 expands inward and the inner diameter decreases. Since the expansion degree of the airbag 18 changes linearly with the inflation amount and is proportional to the inflation amount, the solenoid valve 16 is used to control the gas volume inside the airbag 18 to achieve the effect of precise control of the nitrogen flow rate.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen flow control structure, characterized in that, Comprising: A limiting tube (1), a connection hole (11) is arranged on the outer side of the limiting tube (1), flanges (12) are fixedly installed at both ends of the limiting tube (1), a connection frame (13) is fixedly installed on the left side of the limiting tube (1), an air pump (14) is fixedly installed inside the connection frame (13), a connection pipe (15) is fixedly installed on the right side of the air pump (14), a solenoid valve (16) is fixedly installed at the right end of the connection pipe (15), an intake pipe (17) is fixedly installed on the right side of the solenoid valve (16), an air bag (18) is connected to the right side of the intake pipe (17), an exhaust pipe (19) is fixedly installed above the air bag (18), a silica gel tube (110) is inserted and installed inside the air bag (18), and a flow guide ring (111) is fixedly installed at the front end of the silica gel tube (110).

2. The nitrogen flow control structure according to claim 1, wherein: The connection hole (11) is arranged above and on the left side of the limiting tube (1), the connection frames (13) are symmetrically arranged on the front and rear sides of the air pump (14) with the center of the air pump (14) as the reference, and the air pump (14) is fixedly connected to the limiting tube (1) through the connection frame (13).

3. The nitrogen flow control structure according to claim 1, wherein: The air pump (14) is communicated with the solenoid valve (16) through the connection pipe (15), and the intake pipe (17) is fixedly connected to the limiting tube (1) through the connection hole (11) on the left side of the limiting tube (1).

4. The nitrogen flow control structure according to claim 1, wherein: The intake pipe (17) and the exhaust pipe (19) are of a tee structure, the intake pipe (17), the exhaust pipe (19) and the inner cavity of the air bag (18) are communicated, the air bag (18) is communicated with the air pump (14) through the intake pipe (17), and the air bag (18) is of a tubular structure.

5. The nitrogen flow control structure according to claim 1, wherein: The outer side surface of the air bag (18) is fixedly connected to the inner wall of the limiting tube (1), the exhaust pipe (19) is fixedly connected to the limiting tube (1) through the connection hole (11) above the limiting tube (1), and a solenoid valve (16) is also installed at the top end of the exhaust pipe (19).

6. The nitrogen flow control structure according to claim 1, wherein: The outer diameters of the front and rear ends of the silica gel tube (110) are the same as the inner diameter of the limiting tube (1), the central outer diameter of the silica gel tube (110) is the same as the inner diameter of the air bag (18), and the front and rear ends of the silica gel tube (110) are in a flared shape.

7. The nitrogen flow control structure according to claim 1, wherein: The flow guide rings (111) are symmetrically installed in a front-back mirror image at the front and rear ends of the silica gel tube (110), a slope structure is arranged inside one side of the flow guide ring (111), and the outer side surface of the flow guide ring (111) is fixedly connected to the limiting tube (1).

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