Nitrogen pipeline structure for air separation device

Abstract

The utility model relates to the technical field of nitrogen pipeline structures, in particular to a nitrogen pipeline structure for an air separation unit, which comprises a pipeline body, fixing rings fixedly connected with the pipeline body are symmetrically arranged at two ends of the pipeline body, through holes penetrating through the fixing rings from left to right are arranged on the inner sides of the fixing rings, and bolts are arranged on the inner sides of the through holes. The outer side of the bolt is spirally connected with a nut, the outer side of the bolt and the outer side of the nut are respectively provided with an anti-corrosion assembly, the side, away from the pipeline body, of the fixing ring on the left side is fixedly connected with a sealing ring, and the side, away from the pipeline body, of the fixing ring on the right side is provided with a sealing groove. Through the arrangement of the pipeline body, the fixing ring, the penetrating hole, the bolt, the nut, the sealing ring, the sealing groove, the graphite sealing ring, the connecting rod and the circular ring, the sealing performance of the connecting position of the pipeline body can be guaranteed, and meanwhile the graphite sealing ring is more convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen pipeline structures, in particular to a nitrogen pipeline structure for an air separation device. Background Art

[0002] An air separation unit is an industrial equipment used to separate gas components such as oxygen and nitrogen from the air for separate use. Its working principle is mainly based on the fact that oxygen and nitrogen in the air have different boiling points at different temperatures, and they are separated by distillation. Air separation units can vary greatly depending on their scale and purpose, ranging from small on-site oxygen production equipment to large industrial gas production plants. They are widely used in many fields such as steel manufacturing, chemical industry, healthcare, scientific research, gas distribution, etc. Nitrogen pipelines are an indispensable component in air separation units and are used to transport nitrogen inside the air separation unit. Due to the high pressure inside the air separation unit, the strength and sealing of the nitrogen pipeline are crucial.

[0003] The strength of the existing nitrogen pipeline body is sufficient to withstand the pressure inside the air separation unit, but the strength of the connection of the nitrogen pipeline is relatively weak. Therefore, a graphite sealing ring is usually used to seal the connection of the nitrogen pipeline. However, when the graphite sealing ring is aged and needs to be replaced, the graphite sealing ring is easily stuck inside the sealing groove and difficult to take out. Forcibly taking it out is likely to damage the sealing groove, resulting in reduced sealing of the sealing groove. There are no protective measures for the bolts at the connection of the existing nitrogen pipeline. The bolts are easily rusted when exposed to air or water outside, affecting the strength of the connection. In addition, the existing nitrogen pipeline is not equipped with a safety component, and the pressure inside the nitrogen pipeline cannot be observed. Therefore, in view of the above problems, a nitrogen pipeline structure for an air separation unit is proposed. Utility Model Content

[0004] The utility model aims to provide a nitrogen pipeline structure for an air separation device to solve the problems in the above background technology that graphite sealing rings are difficult to replace, bolts at pipeline connections have no protective measures, and the pipeline has no safety components.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A nitrogen pipeline structure for an air separation device comprises a pipeline body, wherein fixing rings fixedly connected to the pipeline body are symmetrically arranged at both ends of the pipeline body, a through hole penetrating the fixing ring from left to right is provided on the inner side of the fixing ring, a bolt is provided on the inner side of the through hole, a nut is spirally connected to the outer side of the bolt, and anti-corrosion components are provided on the outer sides of the bolt and the nut, a sealing ring is fixedly connected to the side of the fixing ring on the left side away from the pipeline body, a sealing groove is provided on the side of the fixing ring on the right side away from the pipeline body, a graphite sealing ring is provided on the inner side of the sealing groove, a connecting rod penetrating the fixing ring and slidably connected to the fixing ring is provided on one side of the sealing groove, a circular ring is fixedly connected to the end of the connecting rod away from the fixing ring, and a safety component is provided on the outer side of the pipeline body.

[0007] Preferably, the anti-corrosion component includes a threaded groove opened on the side of the fixing ring away from the pipe body, a threaded ring is spirally connected to the inner side of the threaded groove, an internally hollow oil storage tank is fixedly connected to the side of the threaded ring away from the fixing ring, a support rod is fixedly connected to the inner side of the oil storage tank, a pointed cone is fixedly connected to one end of the support rod away from the oil storage tank, and a film is provided on one side of the pointed cone and is fixedly connected to the inner side of the oil storage tank.

[0008] Preferably, there are multiple thread grooves, which are distributed in an array on one side of the fixing ring, and are located outside the perforation. One end of the pointed cone close to the film fits tightly with the film.

[0009] Preferably, the safety component includes a first valve fixedly connected to the top of the pipeline body and communicating with the top of the pipeline body, a pressure gauge fixedly connected to the top of the first valve and communicating with the first valve, a second valve fixedly connected to the top of the pipeline body and communicating with the top of the pipeline body is provided on one side of the first valve, and a proportional unloading valve fixedly connected to the top of the second valve and communicating with the second valve is fixedly connected to the top of the second valve.

[0010] Preferably, there are multiple perforations, which are distributed in an array on one side of the fixing ring, the inner side of the sealing groove fits tightly with the outer side of the graphite sealing ring, and the end of the connecting rod away from the circular ring fits tightly with the graphite sealing ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the pipeline body, fixing ring, perforation, bolt, nut, sealing ring, sealing groove, graphite sealing ring, connecting rod and ring are arranged, which can ensure the sealing of the connection of the pipeline body and make the replacement of the graphite sealing ring more convenient;

[0013] 2. In the utility model, the anti-corrosion components, thread grooves, thread rings, oil storage tanks, support rods, pointed cones and films are provided to protect bolts and nuts from rusting when exposed to air;

[0014] 3. In the utility model, by providing the safety component, the first valve, the pressure gauge, the second valve and the proportional unloading valve, the operator can detect the pressure inside the pipeline body and relieve the pressure of the pipeline body in time when the pressure exceeds the normal range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall disassembled structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the anti-corrosion component of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the right fixing ring of the utility model.

[0019] In the figure: 1. pipeline body; 2. fixing ring; 3. perforation; 4. bolt; 5. nut; 6. anti-corrosion component; 601. threaded groove; 602. threaded ring; 603. oil storage tank; 604. support rod; 605. pointed cone; 606. film; 7. sealing ring; 8. sealing groove; 9. graphite sealing ring; 10. connecting rod; 11. ring; 12. safety component; 1201. first valve; 1202. pressure gauge; 1203. second valve; 1204. proportional unloading valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A nitrogen pipeline structure for an air separation device comprises a pipeline body 1, wherein fixing rings 2 fixedly connected to the pipeline body 1 are symmetrically arranged at both ends of the pipeline body 1, a through hole 3 penetrating the fixing ring 2 from left to right is provided on the inner side of the fixing ring 2, a bolt 4 is provided on the inner side of the through hole 3, a nut 5 is spirally connected to the outer side of the bolt 4, and an anti-corrosion component 6 is provided on the outer side of the bolt 4 and the nut 5, a sealing ring 7 is fixedly connected to the side of the left fixing ring 2 away from the pipeline body 1, a sealing groove 8 is provided on the side of the right fixing ring 2 away from the pipeline body 1, a graphite sealing ring 9 is provided on the inner side of the sealing groove 8, a connecting rod 10 penetrating the fixing ring 2 and slidably connected to the fixing ring 2 is provided on one side of the sealing groove 8, a circular ring 11 is fixedly connected to the end of the connecting rod 10 away from the fixing ring 2, and a safety component 12 is provided on the outer side of the pipeline body 1.

[0025] The anti-corrosion component 6 includes a threaded groove 601 provided on the side of the fixing ring 2 away from the pipe body 1, a threaded ring 602 is spirally connected to the inner side of the threaded groove 601, an inner hollow oil storage tank 603 is fixedly connected to the side of the threaded ring 602 away from the fixing ring 2, a support rod 604 is fixedly connected to the inner side of the oil storage tank 603, a pointed cone 605 is fixedly connected to the end of the support rod 604 away from the oil storage tank 603, a film 606 fixedly connected to the inner side of the oil storage tank 603 is provided on one side of the pointed cone 605, and the anti-corrosion component 6 can prevent the bolts 4 and nuts 5 from rusting, and there are multiple threaded grooves 601, which are distributed in an array on one side of the fixing ring 2, and the threaded grooves 601 are located on the outer side of the perforation 3, and one end of the pointed cone 605 close to the film 606 is tightly fitted with the film 606, and the pointed cone 605 can penetrate the film 606 to make the inner side of the oil storage tank 603 The anti-corrosion oil flows on the surface of the bolt 4 and the nut 5. The safety component 12 includes a first valve 1201 fixedly connected to the top of the pipeline body 1 and communicating with the top of the pipeline body 1. The top of the first valve 1201 is fixedly connected with a pressure gauge 1202 communicating with the first valve 1201. One side of the first valve 1201 is provided with a second valve 1203 fixedly connected to the top of the pipeline body 1 and communicating with the top of the pipeline body 1. The top of the second valve 1203 is fixedly connected with a proportional unloading valve 1204 communicating with the second valve 1203. The safety component 12 can ensure that the pipeline body 1 will not rupture or even explode due to high pressure. There are multiple perforations 3, and the perforations 3 are distributed in an array on one side of the fixing ring 2. The inner side of the sealing groove 8 is tightly fitted with the outer side of the graphite sealing ring 9, and the end of the connecting rod 10 away from the ring 11 is tightly fitted with the graphite sealing ring 9.

[0026] Workflow: First, connect the pipeline body 1, align the two pipeline bodies 1, insert the sealing ring 7 into the inner side of the sealing groove 8, and move the two pipeline bodies 1 to align the perforations 3 on the fixing ring 2, then insert the bolt 4 into the inner side of the perforation 3, screw the nut 5 on the outer side of the bolt 4 and screw it in until the sealing ring 7 fits tightly with the graphite sealing ring 9, then install the anti-corrosion component 6, screw the threaded ring 602 into the inner side of the threaded groove 601 until the support rod 604 contacts the bolt 4 or the nut 5, continue to screw the oil tank 603, the support rod 604 breaks under pressure, and the pointed cone 605 pierces the film 606, and the anti-corrosion oil inside the oil tank 603 can flow on the surface of the bolt 4 and the nut 5, and protect the bolt 4 and the nut 5. To prevent it from rusting, when the pipeline body 1 is ventilated, close the first valve 1201 and the second valve 1203 to prevent the instantaneous high pressure from damaging the pressure gauge 1202 and the proportional unloading valve 1204, and then slowly open the first valve 1201 and the second valve 1203, and the pressure indication can be read through the pressure gauge 1202. The proportional unloading valve 1204 can timely relieve the pressure of the pipeline body 1 when the pressure inside the pipeline body 1 exceeds the normal range. The safety component 12 can ensure that the pipeline body 1 will not rupture or even explode due to high pressure. When the pipeline body 1 needs to be repaired and the graphite sealing ring 9 needs to be replaced, push the ring 11, and the connecting rod 10 on one side of the ring 11 can push the graphite sealing ring 9 out without damaging the sealing groove 8.

[0027] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen pipeline structure for an air separation unit, comprising a pipeline body (1), characterized in that: The two ends of the pipeline body (1) are symmetrically provided with fixing rings (2) fixedly connected to the pipeline body (1); a through hole (3) penetrating the fixing ring (2) from left to right is provided on the inner side of the fixing ring (2); a bolt (4) is provided on the inner side of the through hole (3); a nut (5) is spirally connected to the outer side of the bolt (4); an anti-corrosion component (6) is provided on the outer side of the bolt (4) and the nut (5); a sealing ring (7) is fixedly connected to the side of the fixing ring (2) on the left side away from the pipeline body (1); a sealing groove (8) is provided on the inner side of the sealing groove (8); a graphite sealing ring (9) is provided on the inner side of the sealing groove (8); a connecting rod (10) penetrating the fixing ring (2) and slidably connected to the fixing ring (2) is provided on one side of the sealing groove (8); a circular ring (11) is fixedly connected to the end of the connecting rod (10) away from the fixing ring (2); and a safety component (12) is provided on the outer side of the pipeline body (1).

2. The nitrogen pipeline structure for an air separation unit according to claim 1, characterized in that: The anti-corrosion component (6) comprises a threaded groove (601) formed on a side of a fixing ring (2) away from the pipe body (1); a threaded ring (602) is spirally connected to the inner side of the threaded groove (601); a side of the threaded ring (602) away from the fixing ring (2) is fixedly connected to an oil storage tank (603) with a hollow interior; a support rod (604) is fixedly connected to the inner side of the oil storage tank (603); an end of the support rod (604) away from the oil storage tank (603) is fixedly connected to a pointed cone (605); and a film (606) fixedly connected to the inner side of the oil storage tank (603) is provided on one side of the pointed cone (605).

3. The nitrogen pipeline structure for an air separation unit according to claim 2, characterized in that: There are a plurality of thread grooves (601), and the thread grooves (601) are distributed in an array on one side of the fixing ring (2). The thread grooves (601) are located outside the through hole (3), and one end of the pointed cone (605) close to the film (606) is tightly fitted to the film (606).

4. The nitrogen pipeline structure for an air separation unit according to claim 1, characterized in that: The safety component (12) comprises a first valve (1201) fixedly connected to the top of the pipeline body (1) and communicating with the top of the pipeline body (1); a pressure gauge (1202) communicating with the first valve (1201) is fixedly connected to the top of the first valve (1201); a second valve (1203) fixedly connected to the top of the pipeline body (1) and communicating with the top of the pipeline body (1) is provided on one side of the first valve (1201); and a proportional unloading valve (1204) communicating with the second valve (1203) is fixedly connected to the top of the second valve (1203).

5. The nitrogen pipeline structure for an air separation unit according to claim 1, characterized in that: The number of the through holes (3) is multiple, and the through holes (3) are distributed in an array on one side of the fixing ring (2). The inner side of the sealing groove (8) is tightly fitted with the outer side of the graphite sealing ring (9), and the end of the connecting rod (10) away from the circular ring (11) is tightly fitted with the graphite sealing ring (9).

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