Internal isolation leakage-free gas conveying gas curtain pipe

Abstract

The utility model discloses an internal isolation leakproof gas delivery gas curtain pipe, which comprises a gas curtain pipe body and a gas output part connected with the gas curtain pipe body, the gas curtain pipe body consists of an outer pipe and an inner pipe, an isolation channel is formed between the outer pipe and the inner pipe, the inner pipe is provided with a first leakproof structure, and the first leakproof structure is provided with a second leakproof structure. The outer pipe is provided with a second anti-leakage structure, the gas output part is provided with a sealing connector, and one end of the sealing connector is provided with a cavity communicated with the isolation channel. A double-layer guide pipe structure is adopted, each layer of guide pipe is provided with an anti-leakage structure, a gas conveying channel of the inner pipe is coated with a polytetrafluoroethylene coating, and the coating has high smoothness, so that gas can be smoothly conveyed, and the friction force of high-pressure gas to the inner wall is reduced. The second anti-leakage structure arranged on the outer pipe is provided with the self-repairing material layer, when the anti-leakage structure is damaged by external force, the self-repairing material layer is punctured, then the damaged position is automatically repaired, and the anti-leakage effect is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas guide pipe, concretely is a kind of inner isolation no-leakage gas conveying air curtain pipe. BACKGROUND

[0002] Air curtain pipe is mainly used in automobile safety air bag system, responsible for conveying gas quickly when air bag unfolds, and the gas is conveyed to air bag through air curtain pipe. The design of air curtain pipe must ensure that the gas can be conveyed to air bag at high flow rate in very short time, and the inflation is usually completed within millisecond to ensure that air bag can inflate rapidly and protect the safety of occupant. The defects of traditional air curtain pipe are as follows: the overall structure of air curtain pipe has less functionality and poor leak-proof performance, and the internal design does not have optimized structure, which may cause poor gas flow, increase the residence time of gas in pipeline and affect the response speed of air bag. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a kind of inner isolation no-leakage gas conveying air curtain pipe, which can effectively solve the problems raised in the background art.

[0004] The utility model solves the technical problems by adopting the following technical scheme:

[0005] A kind of inner isolation no-leakage gas conveying air curtain pipe, including air curtain pipe body and the gas output portion connected with air curtain pipe body, the air curtain pipe body is composed of outer tube and inner tube, the isolation channel is formed between the outer tube and inner tube, the inner tube is equipped with first leak-proof structure, the outer tube is equipped with second leak-proof structure, wherein the gas output portion is equipped with sealing joint, one end of the sealing joint is equipped with cavity communicated with isolation channel;

[0006] The first leak-proof structure includes polyimide layer, first braided layer, silica gel layer, first leak-proof membrane attached to the inner side of silica gel layer and polytetrafluoroethylene coating coated on the surface of first leak-proof membrane, the second leak-proof structure includes rubber layer, self-repairing material layer, PTFE layer and second braided layer, the inner side of the rubber layer is provided with second leak-proof membrane, wherein the first braided layer and silica gel layer are arranged on polyimide in a stacked manner, and the self-repairing material layer, PTFE layer and second braided layer are arranged on rubber layer in a stacked manner.

[0007] As a further description of the above technical scheme, the end of the sealing joint away from the cavity is provided with movable corrugated sleeve and top piece, the connecting part of the sealing joint and the corrugated sleeve is provided with guide groove, and the corrugated sleeve moves along the axis direction of the sealing joint through the top piece.

[0008] As a further description of the above technical scheme, the inner wall of the corrugated sleeve is provided with anti-skid thread grooves, the corrugated sleeve is connected with a top piece, and the top piece comprises a top rod and a spring sleeved on the top rod.

[0009] As a further description of the above technical scheme, the chamber is further provided with a whistle for detecting gas leakage, and the chamber is sealingly connected with the isolation channel.

[0010] As a further description of the above technical scheme, the outer side of the sealing joint is formed with a fixing groove, one end of the outer pipe close to the sealing joint is provided with a bent part connected with the fixing groove, and the connection part of the sealing joint with the inner pipe is provided with a fixing ring.

[0011] As a further description of the above technical scheme, the self-repairing material layer is provided with densely distributed microcapsules, and the microcapsules are filled with epoxy resin repairing agent.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses an inner isolation no-leakage gas conveying air curtain pipe, which has at least one of the following beneficial effects in use:

[0014] The double-layer conduit structure is adopted, each layer of conduit is provided with a leakage prevention structure, the isolation channel is further arranged between the inner pipe and the conduit, when the inner pipe leaks, the generated gas is conveyed to the chamber on the sealing joint through the isolation channel, and the whistle produces sound through the action of the airflow, so that the leakage problem of the air curtain pipe can be detected in the first time and whether the inner pipe of the air curtain pipe leaks can be quickly judged. The channel conveying the gas of the inner pipe is coated with a polytetrafluoroethylene coating layer, the coating layer has high smoothness, the gas can be smoothly conveyed, and the friction of the high-pressure gas on the inner wall is reduced. The second leakage prevention structure arranged on the outer pipe is provided with a self-repairing material layer, when the self-repairing material layer is broken by external force, the self-repairing material layer is repaired at the broken position, and the leakage prevention effect is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model discloses an inner isolation no-leakage gas conveying air curtain pipe;

[0016] Figure 2 It is a side perspective structure schematic view of the utility model discloses an inner isolation no-leakage gas conveying air curtain pipe;

[0017] Figure 3 It is the structure schematic view of part A of the utility model; Figure 2

[0018] Figure 4 It is a partial structure schematic view of the utility model discloses an inner isolation no-leakage gas conveying air curtain pipe; ​

[0019] Figure 5 It is an inner pipe structure schematic view of the gas curtain pipe of the utility model.

[0020] Figure 6 It is an outer pipe structure schematic view of the gas curtain pipe of the utility model.

[0021] Reference numerals in the drawing:

[0022] 1, gas curtain pipe body; 101, isolation channel; 2, gas output part; 201, sealing joint; 202, corrugated sleeve; 203, bending part; 204, whistle; 205, top rod; 206, spring; 3, outer pipe; 301, polyimide layer; 302, silica gel layer; 303, first braided layer; 304, polytetrafluoroethylene coating; 305, first leakproof membrane; 306, first leakproof structure; 4, inner pipe; 401, second leakproof membrane; 402, rubber layer; 403, self-repairing material layer; 404, PTFE layer; 405, second braided layer; 406, second leakproof structure. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] As shown in Figures 1-6 The utility model provides a kind of gas curtain pipe of inner isolation no-leakage gas conveying, including gas curtain pipe body 1 and the gas output part 2 of connecting gas curtain pipe body 1, the gas curtain pipe body 1 is made of outer pipe 3 and inner pipe 4, isolation channel 101 is formed between the outer pipe 3 and inner pipe 4, the inner pipe 4 is equipped with first leakproof structure 306, the outer pipe 3 is equipped with second leakproof structure 406, wherein the gas output part 2 is equipped with sealing joint 201, one end of the sealing joint 201 is equipped with the cavity that is communicated with isolation channel 101.

[0025] The embodiment is suitable for the delivery tube of the airbag of the automobile, adopts the double-layer conduit structure, each layer of the conduit is provided with the leakage prevention structure, the isolation channel 101 is further arranged between the inner tube 4 and the conduit, when the inner tube 4 leaks, the gas generated by the inner tube 4 is transported to the chamber on the sealed joint 201 through the isolation channel 101, and the whistle 204 is sounded through the action of the airflow, so that the air curtain tube leakage problem can be detected in the first time and whether the inner tube 4 of the air curtain tube leaks can be quickly judged. The channel for transporting the gas of the inner tube 4 is coated with a polytetrafluoroethylene coating layer 304, the coating layer has high smoothness, the gas can be smoothly transported, and the friction of the high-pressure gas on the inner wall is reduced. The second leakage prevention structure 406 arranged on the outer tube 3 is provided with a self-repairing material layer 403, when the self-repairing material layer 403 is broken by external force, the self-repairing material layer 403 is repaired at the broken part after being broken, and the leakage prevention effect is stronger.

[0026] The first leakage prevention structure 306 includes a polyimide layer 301, a first woven layer 303, a silica gel layer 302, a first leakage prevention film 305 attached to the inner side of the silica gel layer 302 and a polytetrafluoroethylene coating layer 304 coated on the surface of the first leakage prevention film 305, the second leakage prevention structure 406 includes a rubber layer 402, a self-repairing material layer 403, a PTFE layer 404 and a second woven layer 405, and the inner side of the rubber layer 402 is provided with a second leakage prevention film 401, wherein the first woven layer 303 and the silica gel layer 302 are stacked on the polyimide layer 301, and the self-repairing material layer 403, the PTFE layer 404 and the second woven layer 405 are stacked on the rubber layer 402.

[0027] The polyimide layer 301 in the embodiment serves as the outer material, the polyimide has excellent high-temperature resistance, chemical resistance and mechanical strength, can effectively protect the internal structure and prevent the external environment from damaging the conduit.

[0028] The first woven layer 303 and the second woven layer 405 provide additional mechanical strength and flexibility, enhance the durability and tensile resistance of the structure, and further improve the compatibility and flexibility in combination with the silica gel layer 302 and the rubber layer 402, so as to ensure the safe use of the conduit in the body and the leakage prevention film attached to the surface of the conduit, and further improve the leakage prevention performance.

[0029] The PTFE layer 404 and the polytetrafluoroethylene coating layer 304 serve as the inner material, the PTFE has excellent corrosion resistance and low friction coefficient, can reduce the resistance of the fluid in the conduit and improve the flow efficiency, and at the same time provides additional leakage prevention protection. The whole is combined by adopting the multi-layer material combination, the application of the leakage prevention film and the self-repairing material, and the leakage prevention performance and use safety of the conduit are significantly improved.

[0030] Further, the end of the sealing joint 201 away from the chamber is provided with a movable corrugated sleeve 202 and a top piece, and a guide groove is arranged at the connection between the sealing joint 201 and the corrugated sleeve 202, and the corrugated sleeve 202 moves along the axial direction of the sealing joint 201 through the top piece. The inner wall of the corrugated sleeve 202 is provided with an anti-skid thread groove, and the corrugated sleeve 202 is connected with the top piece, and the top piece includes a top rod 205 and a spring 206 sleeved on the top rod 205.

[0031] The corrugated sleeve 202 can be tightly sleeved during connection through the top piece, and the movability enables it to move freely under different working conditions (such as temperature change, pressure fluctuation, etc.), thereby adapting to the thermal expansion and contraction of the pipeline.

[0032] Further, the chamber is also provided with a whistle 204 for detecting gas leakage, and the chamber is sealingly connected with the isolation channel 101. The whistle 204 as a gas leakage detection device can emit sound when the gas passes through. When the inner tube 4 leaks, the leaked gas will enter the chamber of the sealing joint 201 through the isolation channel 101, push the whistle 204 to produce sound, and an alarm can be sounded. The isolation channel 101 is used to guide the leaked gas into the chamber, and the design of the isolation channel 101 ensures the smoothness of the gas flow and ensures that the whistle 204 can respond in time. It is convenient for maintenance personnel to judge whether the inner tube 4 of the gas curtain pipe leaks, and to avoid greater losses or incidents caused by not discovering the leakage in time.

[0033] Further, the outer side of the sealing joint 201 is formed with a fixing groove, the end of the outer tube 3 close to the sealing joint 201 is provided with a bending part 203 connected with the fixing groove, and the connection part of the sealing joint 201 and the inner tube 4 is provided with a fixing ring. The fixing groove formed on the outer side of the sealing joint 201 is used to provide a stable connection point, so that the outer tube 3 can be firmly fixed on the sealing joint 201. The design of the fixing groove can effectively prevent the pipeline from loosening due to vibration or external force during use. The bending part 203 arranged at the sealing joint 201 is used to fix the outer tube 3, and the outer tube 3 is bent inward and fixed in the bending part 203. The combination of the structure of the fixing groove and the bending part 203 makes the connection between the outer tube 3 and the sealing joint 201 more stable, can withstand greater external force and vibration, and reduces the risk of falling off during use.

[0034] Further, the self-repairing material layer 403 is provided with densely distributed microcapsules filled with epoxy resin repairing agent. The microcapsule is a small closed structure made of polymer material, which can keep the content stable under the influence of external environment. Its size is micron level, which can be uniformly distributed in the material layer. When the self-repairing material layer 403 is subjected to external force or damage, the microcapsule will break and release the epoxy resin repairing agent. The epoxy resin then flows to the damage site and cures under appropriate conditions, thereby repairing the damage.

[0035] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. An internally isolated, leak-free, gas delivery air curtain tube, characterized by: The air curtain pipe body is composed of an outer pipe and an inner pipe, and an isolation channel is formed between the outer pipe and the inner pipe, the inner pipe is provided with a first leakage prevention structure, and the outer pipe is provided with a second leakage prevention structure, wherein the gas output part is provided with a sealing joint, one end of the sealing joint is provided with a cavity communicating with the isolation channel; The first leakage prevention structure comprises a polyimide layer, a first braided layer, a silica gel layer, a first leakage prevention film attached to the inner side of the silica gel layer, and a polytetrafluoroethylene coating layer coated on the surface of the first leakage prevention film, the second leakage prevention structure comprises a rubber layer, a self-repairing material layer, a PTFE layer, and a second braided layer, the inner side of the rubber layer is provided with a second leakage prevention film, and the first braided layer and the silica gel layer are arranged on the polyimide layer in a stacked manner, and the self-repairing material layer, the PTFE layer, and the second braided layer are arranged on the rubber layer in a stacked manner.

2. A gas curtain tube according to claim 1, wherein: The sealing joint is provided with a movable corrugated sleeve and a top piece at the end away from the cavity, a guide groove is arranged at the connection between the sealing joint and the corrugated sleeve, and the corrugated sleeve moves along the axis direction of the sealing joint through the top piece.

3. A gas curtain tube according to claim 2, wherein: The inner wall of the corrugated sleeve is provided with an anti-skid thread groove, the corrugated sleeve is connected with the top piece, and the top piece comprises a top rod and a spring sleeved on the top rod.

4. The inner barrier leak-free gas delivery air curtain tube of claim 1, wherein: The cavity is also provided with a whistle for detecting gas leakage, and the cavity is sealingly connected to the isolation channel.

5. The inner barrier leak-free gas delivery air curtain tube of claim 1, wherein: The outer side of the sealing joint is formed with a fixing groove, one end of the outer pipe close to the sealing joint is provided with a bending part connected with the fixing groove, and the connection between the sealing joint and the inner pipe is provided with a fixing ring.

6. The inner barrier leak-free gas delivery air curtain tube of claim 1, wherein: The self-repairing material layer is provided with densely distributed microcapsules, and the microcapsules are filled with an epoxy resin repairing agent.

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