WO2021035908A1 - Système de raccordement de tuyau souple et dur conçu pour une haute pression - Google Patents

Système de raccordement de tuyau souple et dur conçu pour une haute pression Download PDF

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Publication number
WO2021035908A1
WO2021035908A1 PCT/CN2019/112237 CN2019112237W WO2021035908A1 WO 2021035908 A1 WO2021035908 A1 WO 2021035908A1 CN 2019112237 W CN2019112237 W CN 2019112237W WO 2021035908 A1 WO2021035908 A1 WO 2021035908A1
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WIPO (PCT)
Prior art keywords
high pressure
hard pipe
flexible
system suitable
transition joint
Prior art date
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PCT/CN2019/112237
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English (en)
Chinese (zh)
Inventor
谈士力
宋晓伟
彭晓勇
Original Assignee
上海众源燃油分配器制造有限公司
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Publication of WO2021035908A1 publication Critical patent/WO2021035908A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/02—Hose-clips
    • F16L33/035—Hose-clips fixed by means of teeth or hooks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/10—Adhesive or cemented joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/02—Hose-clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/26—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses specially adapted for hoses of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal

Definitions

  • the invention relates to a connection system, in particular to a soft and hard pipe connection system suitable for high pressure.
  • New energy electric vehicles have a key role in improving the driving range requirements of electric vehicles.
  • Thermal management plays a key role in the popularization of urban electric transportation, the extension of battery life, the improvement of endurance and the improvement of drive system performance.
  • the heat pump air conditioner is an effective solution for the heating of pure electric vehicles. In the absence of breakthroughs in power batteries, low energy consumption heating must be ensured. Heat pump air conditioning is one of the few feasible technologies. The efficiency coefficient is much higher than that of PTC heating, which can effectively extend the cruising range.
  • the traditional air-conditioning refrigerant is R134a, and the air-conditioning system pressure can be divided into high pressure and low pressure according to the working conditions, among which: high pressure is about 13bar and low pressure is 1bar-3bar. Therefore, R134a is only used as a substitute in the transition to environmentally friendly products, and it is only a matter of time before it is completely eliminated.
  • the heat pump air-conditioning refrigerant uses R744 (CO2) carbon dioxide refrigerant.
  • the working pressure of the high-pressure pipe is 170bar, and the maximum pressure in the pipe can reach 300bar under extreme high temperature climatic conditions.
  • the working pressure of the low-pressure pipe is 130bar. Similarly, the pressure inside the pipe will also rise sharply under extreme high temperature climate conditions.
  • the traditional automotive air conditioning hose assembly cannot withstand the ambient temperature of -40°C to 180°C and the system pressure of 130-170bar (the ultimate pressure of 300bar). If it cannot withstand high temperature and high pressure, when used in new energy vehicles, only electric heating wires can be used for air conditioning heating, and heat pump technology cannot be used for heating. The use of electric heating wires for heating will greatly reduce the car’s cruising range; if all connections are made with hard pipes, although the sealing problem of the pipeline can be solved, due to the limitation of the car’s internal space, hard pipes cannot be used completely, and hoses and hard pipes must be used.
  • the pipe assembly of the pipe combination if all connections are made with hard pipes, although the sealing problem of the pipeline can be solved, due to the limitation of the car’s internal space, hard pipes cannot be used completely, and hoses and hard pipes must be used.
  • Chinese patent CN102478139B discloses a pipe joint including a soft pipe, a hard pipe and a sleeve.
  • the hard tube includes an insertion part that is inserted into the soft tube from the end of the soft tube.
  • the sleeve is arranged radially outside the insertion part and the soft tube, and presses the soft tube toward the insertion part.
  • the insertion portion includes a corrugated surface provided on the outer surface of the insertion portion and a cylindrical surface provided on the outer surface on the tip side of the insertion portion.
  • the sleeve includes a first small diameter part and a second small diameter part.
  • the first small diameter part is arranged radially outside the corrugated surface and presses the soft tube against the corrugated surface, and the second small diameter part is arranged in the radial direction of the cylindrical surface. Externally and press the flexible tube to the cylindrical surface.
  • the purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a flexible and hard pipe connection system suitable for high pressure, which solves the problem of the inability to bear pressure and resistance to high and low temperatures at the connection of the flexible and hard pipes.
  • a flexible and hard pipe connection system suitable for high pressure including:
  • the two ends of the corrugated tube are connected to the core tube by welding, riveting or rolling interference.
  • the welding includes laser welding, argon arc welding, copper brazing or plasma welding.
  • the hoses are provided with several hoses, and adjacent hoses are connected with each other through a nylon traction tube through a rubber coating.
  • the nylon traction tube extends into the mouth of the core tube for interference fit connection or threaded connection.
  • the hose After the hose is encapsulated, it is cut into a hose with a specified length through processing, and then connected with the transition joint.
  • the hose is processed to remove the rubber on the outside of the hose and expose the toothed part of the core tube.
  • the exposed core tube tooth part of the hose is inserted into the transition joint to form an interference or clearance fit.
  • the encapsulation is a coated rubber layer.
  • the rubber layer includes: an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wound and braided outside the inner rubber layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the hard tube material is aluminum, stainless steel or other metals.
  • the hard tube is connected with the transition joint by flame brazing, high frequency induction welding, cold welding, brazing or laser welding.
  • the hard tube is connected to the pressure plate by flame brazing, high frequency induction welding, cold welding, brazing, and laser welding relative to the other side of the transition joint.
  • the transition joint is provided with a concave ring groove.
  • the material of the buckle sleeve is aluminum, stainless steel or other metals, and one end of the buckle sleeve is convex inward, and this part is inserted into the concave ring groove of the transition joint during the crimping.
  • the inner surface of the aluminum buckle sleeve is a flat structure without a ring-shaped inner convex structure. Because the material of aluminum is relatively soft, the inner surface will change with the shape of the outer surface of the transition joint during the subsequent buckle processing.
  • the outer surface of the transition joint is provided with an annular groove, and the inner surface of the buckle sleeve will form an inner convex structure following the shape of the annular groove, and the inner convex structure will be pressed into the annular groove to realize a tight connection between the buckle sleeve and the transition joint.
  • the inner surface of stainless steel or other metals is provided with a ring-shaped inner convex structure, and the buckle sleeve and the transition joint are tightly connected through the inner convex structure.
  • the buckle sleeve is radially applied to the buckle sleeve through the die on the crimping machine, and the outer diameter of the buckle sleeve is compressed to reach the extruded transition joint to realize the riveting connection between the transition joint and the core tube and the buckle sleeve to achieve sealing and pull-off resistance. effect.
  • the die on the crimping machine is squeezed integrally or locally along the circumferential outer wall of the buckle sleeve.
  • the present invention mainly solves the pressure bearing and high and low temperature resistance problems of the soft and hard pipe joints, and has the following advantages:
  • the inner rubber is filled with the corrugated tube and the core tube groove, thereby reducing the deformation of the corrugated tube, avoiding the generation of deformed martensite, and enhancing the pressure resistance of the hose;
  • the transition joint is connected with the buckle sleeve and the core tube through the integral crimping of the buckle sleeve to realize the conversion of hard pipes of different metal materials and the sealing of the crimping part without being affected by temperature;
  • the performance of the hose assembly is greatly improved.
  • the application can withstand the test of high-pressure working conditions and the pressure-bearing and sealing ability of the hose assembly does not decrease in high and low temperature environments;
  • Figure 1 is a schematic diagram of the structure of the hose before encapsulation
  • Figure 2 is a schematic diagram of the structure of the hose obtained after encapsulation
  • Figure 3 is a schematic diagram of the structure of the hard tube
  • Figure 4 is a schematic diagram of the connection between the hard pipe and the transition joint
  • Figure 5 is a schematic diagram of the structure before the hose and the hard pipe are connected
  • Figure 6 is a structural diagram of a flexible and hard pipe connection system suitable for high pressure
  • FIG. 7 is a schematic diagram of the connection structure of multiple hoses in Embodiment 2.
  • Figure 8 is a schematic diagram of the structure of the encapsulation after multiple hoses are connected
  • Example 9 is a schematic diagram of the connection structure between the buckle sleeve and the transition joint before processing in Example 6;
  • Figure 10 is a partial enlarged view of Figure 9;
  • FIG. 11 is a schematic diagram of the connection structure between the buckle sleeve and the transition joint after processing in Embodiment 6;
  • Figure 12 is a partial enlarged view of Figure 11;
  • FIG. 13 is a schematic diagram of the structure after processing the outside of the buckle sleeve in Embodiment 6;
  • Example 14 is a schematic diagram of the connection structure between the buckle sleeve and the transition joint before processing in Example 7;
  • Figure 15 is a partial enlarged view of Figure 14;
  • FIG. 16 is a schematic diagram of the connection structure between the buckle sleeve and the transition joint after processing in Embodiment 7;
  • Fig. 17 is a partial enlarged view of Fig. 16.
  • a flexible and hard pipe connection system suitable for high pressure including a hose, a hard pipe, a transition joint and a buckle.
  • the hose is composed of a core pipe and a corrugated pipe connected with a rubber encapsulation; the hard pipe and the hose pass through The cross joint is connected; the hose and the transition joint are also sleeved with a buckle sleeve.
  • the two ends of the corrugated tube are connected to the core tube by welding, riveting or rolling interference.
  • the welding methods include but are not limited to laser welding, argon arc welding, copper brazing or plasma welding.
  • hoses can be connected to each other through multiple hoses, and adjacent hoses are connected to each other through nylon traction tubes.
  • the nylon traction tube extends into the core tube mouth for interference fit connection or threaded connection, and then the overall encapsulation is performed. After the encapsulation is completed, the hose is cut into a specified length through processing, and then connected with the transition joint. This encapsulation method can realize mass continuous production.
  • the transition joint When the hose is connected to the transition joint, first remove the outer cover of the connecting end of the hose and the transition joint to expose the toothed part of the core tube, and then insert the toothed part into the transition joint.
  • the used transition joint is provided with With the concave ring groove, there is an interference or clearance fit between the hose and the transition joint.
  • the encapsulation used is a coated rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wrapped and braided outside the rubber inner layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the corrugated tube and the core tube assembly are integrally encapsulated, and the inner layer of rubber is filled with the corrugated tube and the core tube groove to reduce the deformation of the corrugated tube and avoid the generation of deformed martensite, thereby enhancing the pressure resistance of the hose.
  • the materials that can be used to make hard tubes include aluminum, stainless steel or other metals.
  • One end of the hard tube is connected to the transition joint by flame brazing, high frequency induction welding, cold welding, brazing or laser welding, and the other end is flame brazing, high frequency induction welding, cold welding, brazing, laser welding and pressing plate or Other connection elements are connected.
  • the material of the buckle sleeve used is aluminum, stainless steel or other metals, and one end of the buckle sleeve is convex inward, and this part is inserted into the concave ring groove of the transition joint during crimping.
  • the buckle sleeve applies radial force to the buckle sleeve through the mold on the crimping machine, and the outer diameter of the buckle sleeve is compressed to squeeze the transition joint to realize the riveting connection between the transition joint and the hose and the buckle sleeve to achieve the effect of sealing and anti-stretching.
  • the die on the crimping machine can be used for overall extrusion or targeted partial extrusion along the outer circumferential wall of the buckle sleeve.
  • the transition joint is connected with the buckle sleeve and the core tube through the integral crimping of the buckle sleeve, so as to realize the conversion of hard pipes of different metal materials and the sealing of the crimping part without being affected by
  • a flexible and hard pipe connection system suitable for high pressure includes a hose, a hard pipe 5, a transition joint 7, and a buckle 8. Its structure is shown in Figure 6.
  • the hard tube 5 in this embodiment is an aluminum hard tube, and one end is connected to the pressure plate 6 by flame brazing, and its structure is shown in FIG. 3. One end of the hard tube 5 is inserted into the transition joint 7 and connected by welding through the contact surface.
  • the welding method is flame brazing, as shown in FIG. 4.
  • the hose is composed of a core tube 1 and a corrugated tube 2 connected with a rubber covering 4, as shown in Figure 1-2, the core tube 1 is connected to both ends of the corrugated tube 2 by laser welding, and the rubber covering is used. Rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube 1 and the corrugated tube 2, a reinforcing layer wrapped and braided outside the inner rubber layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the hose is cut to the specified length and then connected to the transition joint. When the hose is connected to the transition joint 7, first remove the outer cover of the connecting end of the hose and the transition joint 7 and expose the toothed part of the core tube, and then insert the toothed part into the transition joint 7.
  • the joint is provided with a concave ring groove, and there is an interference fit between the hose and the transition joint.
  • the encapsulation that constitutes the hose is a coated rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wrapped and braided outside the rubber inner layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the corrugated tube and the core tube assembly are integrally encapsulated, and the inner layer of rubber is filled with the corrugated tube and the core tube groove to reduce the deformation of the corrugated tube and avoid the generation of deformed martensite, thereby enhancing the pressure resistance of the hose.
  • the material of the buckle sleeve 8 used is aluminum, and one end of the buckle sleeve 8 is convex inward, and this part is embedded in the concave ring groove provided in the transition joint 7 during crimping.
  • the buckle sleeve 8 can apply radial force to the buckle sleeve through the die on the crimping machine, and the outer diameter of the buckle sleeve can be compressed to reach the squeeze transition joint to realize the riveting connection between the transition joint and the core tube and the buckle sleeve.
  • the crimping machine can be used for specific operations.
  • the upper die is squeezed integrally or locally along the outer wall of the buckle sleeve circumference, so as to achieve the effect of sealing and anti-stretching.
  • the transition joint 7 is integrally crimped by the buckle sleeve 8, and the buckle sleeve 7 and the core tube 1 are riveted and sealed, and finally a flexible and hard pipe connection system suitable for high pressure is formed. It can realize the conversion of different metal materials and the sealing of the crimped part and is not affected by temperature. influences.
  • the sealing performance of the high-pressure air-conditioning pipe soft and hard pipe connection sealing system produced in this embodiment is tested.
  • the burst pressure of the existing ordinary air-conditioning hose is only about 100 bar.
  • the use pressure of the technology is an order of magnitude higher than that of the existing technology.
  • its burst pressure is 340 bar, and the actual measured value of the burst pressure of the present invention has reached twice that. In this way, the present invention can be used in the air-conditioning pipelines of new energy vehicles. Because it can withstand high pressure, heat pump technology can be used for heating, thereby avoiding the use of traditional electric heating to cause electric vehicles to have a large cruising range due to power consumption. Reduce the problem.
  • a flexible and hard pipe connection system suitable for high pressure Its structure is roughly the same as that of Embodiment 1. The difference is that there are several hoses in this application, and adjacent hoses are connected to each other through nylon traction tube 3, such as As shown in Fig. 7, when connecting, the nylon traction tube extends into the core tube mouth for interference fit connection or threaded connection, and this embodiment adopts interference connection. Then the whole encapsulation is carried out. After the encapsulation is completed, the hose is cut into a specified length through processing, and then connected with the transition joint. This encapsulation method can realize mass continuous production. After the connection is completed, encapsulation is performed, and the resulting hose is shown in Figure 8.
  • a flexible and hard pipe connection system suitable for high pressure including a hose, a hard pipe, a transition joint and a buckle.
  • the hose is composed of a core pipe and a corrugated pipe connected with a rubber encapsulation; the hard pipe and the hose pass through The cross joint is connected; the hose and the transition joint are also sleeved with a buckle sleeve.
  • the rubber encapsulation on the outside of the hose is a covered rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wrapped and braided outside the rubber inner layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the corrugated tube and the core tube assembly are integrally encapsulated, and the inner layer of rubber is filled with the corrugated tube and the core tube groove to reduce the deformation of the corrugated tube and avoid the generation of deformed martensite, thereby enhancing the pressure resistance of the hose.
  • the transition joint used is provided with a recess There is a clearance fit between the ring groove, the hose and the transition joint before crimping.
  • a stainless steel tube is used as the hard tube.
  • One end of the hard tube is connected to the transition joint by high-frequency induction welding, and the other end is connected to the pressure plate by cold welding.
  • the material of the buckle sleeve used is stainless steel, and one end of the buckle sleeve is convex inward, and this part is inserted into the concave ring groove of the transition joint during crimping.
  • the buckle sleeve applies radial force to the buckle sleeve through the mold on the crimping machine, and the outer diameter of the buckle sleeve is compressed to squeeze the transition joint to realize the riveting connection between the transition joint and the hose and the buckle sleeve to achieve the effect of sealing and anti-stretching.
  • the die on the crimping machine can be used for overall extrusion or targeted partial extrusion along the outer circumferential wall of the buckle sleeve.
  • the transition joint is connected with the buckle sleeve and the core tube through the integral crimping of the buckle sleeve, so as to realize the conversion of hard pipes of different metal materials and the sealing of the crimping part without being affected by temperature.
  • a flexible and hard pipe connection system suitable for high pressure including a hose, a hard pipe, a transition joint and a buckle.
  • the hose is composed of a core pipe and a corrugated pipe connected with a rubber encapsulation; the hard pipe and the hose pass through The cross joint is connected; the hose and the transition joint are also sleeved with a buckle sleeve.
  • the two ends of the corrugated tube are connected to the core tube by rolling interference.
  • the hoses can be connected to each other through multiple hoses.
  • the adjacent hoses are connected to each other through the nylon traction tube. connection.
  • the encapsulation used is a coated rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wrapped and braided outside the rubber inner layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the corrugated tube and the core tube assembly are integrally encapsulated, and the inner layer of rubber is filled with the corrugated tube and the core tube groove to reduce the deformation of the corrugated tube and avoid the generation of deformed martensite, thereby enhancing the pressure resistance of the hose.
  • alloy steel is used as the hard tube.
  • One end of the hard tube is connected to the transition joint by brazing, and the other end is connected to the pressure plate by laser welding.
  • the material of the buckle sleeve used is alloy steel, and one end of the buckle sleeve is convex inward, and this part is inserted into the concave ring groove of the transition joint during crimping.
  • the buckle sleeve applies radial force to the buckle sleeve through the mold on the crimping machine, and the outer diameter of the buckle sleeve is compressed to achieve the squeezing transition joint to realize the riveting connection between the transition joint and the core tube and the buckle sleeve to achieve the effect of sealing and anti-stretching.
  • the die on the crimping machine can be used for overall extrusion or targeted partial extrusion along the outer circumferential wall of the buckle sleeve.
  • the transition joint is connected with the buckle sleeve and the core tube through the integral crimping of the buckle sleeve, so as to realize the conversion of hard pipes of different metal materials and the sealing of the crimping part without being affected by temperature
  • a flexible and hard pipe connection system suitable for high pressure including a hose, a hard pipe, a transition joint and a buckle.
  • the hose is composed of a core pipe and a corrugated pipe connected with a rubber encapsulation; the hard pipe and the hose pass through The cross joint is connected; the hose and the transition joint are also sleeved with a buckle sleeve.
  • the rubber encapsulation on the outside of the hose is a covered rubber layer.
  • the rubber layer includes an inner rubber layer wrapped around the core tube and the corrugated tube, a reinforcing layer wrapped and braided outside the rubber inner layer, and an outer rubber layer wrapped outside the reinforcing layer.
  • the corrugated tube and the core tube assembly are integrally encapsulated, and the inner layer of rubber is filled with the corrugated tube and the core tube groove to reduce the deformation of the corrugated tube and avoid the generation of deformed martensite, thereby enhancing the pressure resistance of the hose.
  • the transition joint used is provided with a recess There is a clearance fit between the ring groove, the hose and the transition joint.
  • carbon steel is used as the hard tube.
  • One end of the hard tube is connected to the transition joint by high-frequency induction welding, and the other end is connected to the pressure plate by cold welding.
  • the material of the buckle sleeve used is carbon steel, and one end of the buckle sleeve is convex inward, and this part is inserted into the concave ring groove of the transition joint during crimping.
  • the buckle sleeve applies radial force to the buckle sleeve through the mold on the crimping machine, and the outer diameter of the buckle sleeve is compressed to achieve the squeezing transition joint to realize the riveting connection between the transition joint and the core tube and the buckle sleeve to achieve the effect of sealing and anti-stretching.
  • the die on the crimping machine can be used for overall extrusion or targeted partial extrusion along the outer circumferential wall of the buckle sleeve.
  • the transition joint is connected with the buckle sleeve and the core tube through the integral crimping of the buckle sleeve, so as to realize the conversion of hard pipes of different metal materials and the sealing of the crimping part without being affected by temperature
  • a flexible and hard pipe connection system suitable for high pressure Its composition and processing technology are roughly the same as those of embodiment 1. It needs special explanation that in this embodiment, the buckle 8 is made of aluminum, and the buckle 8 is made of aluminum.
  • the inner surface has a flat structure before processing, and there is no annular convex structure, as shown in Figure 9-10. Since the material of aluminum is relatively soft, the inner surface will change with the shape of the outer surface of the transition joint during the subsequent buckle processing.
  • the outer surface of the transition joint 7 is provided with an annular groove 71, and the inner surface of the buckle 8 will change As the shape of the annular groove 71 forms an inner convex structure, the inner convex structure will be pressed into the annular groove 71 to achieve a tight connection between the buckle sleeve and the transition joint. As shown in Figure 11, the assembly is completed, and it can also be buckled. The outer surface of the sleeve 8 is crimped as needed, and the final structure is shown in Figure 12-13.
  • the buckle sleeve 8 used is made of stainless steel, and because the material is relatively hard, Therefore, it is necessary to provide a ring-shaped convex structure 81 on the inner surface of the buckle 8 before processing.
  • the transition joint 7 used in this embodiment is made of aluminum, and its surface is flat before the connection processing is shown in Figure 14- As shown in 15, through the crimping process, the buckle sleeve 8 is embedded into the outer surface of the transition joint 7, and the annular convex structure 81 provided on the inner surface of the buckle sleeve 8 will be pressed into the outer surface of the transition joint 7. A groove that matches the ring-shaped inner convex structure 81 is formed, so that the buckle sleeve 8 is tightly connected with the transition joint 7, as shown in Figs. 16-17.
  • the description with reference to the terms “one embodiment”, “example”, “specific example”, etc. means that the specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in the utility model. In at least one embodiment or example.
  • the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example.
  • the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

La présente invention concerne un système de raccordement de tuyau souple et dur conçu pour une haute pression, comprenant : un tuyau souple formé par raccordement d'un tuyau central (1) et d'un tuyau ondulé (2), l'extérieur du tuyau souple étant pourvu d'une couche de caoutchouc revêtue (4) ; un tuyau dur (5) ; un joint de transition (7) raccordant le tuyau souple et le tuyau dur ; et un manchon de gauchissement (8) qui est gauchi et pressé sur l'extérieur du tuyau souple et du joint de transition. La présente invention peut améliorer considérablement les performances d'étanchéité entre le tuyau souple et le tuyau dur, et résout les problèmes selon lesquels une position de raccordement entre le tuyau souple et le tuyau dur ne peut pas supporter la pression, et ne peut pas résister à une température élevée et à une basse température, ce qui permet une utilisation dans des conditions de travail de température élevée, de basse température et de haute pression, et permet en outre une utilisation dans une conduite de climatiseur d'une automobile à énergie nouvelle.
PCT/CN2019/112237 2019-08-29 2019-10-21 Système de raccordement de tuyau souple et dur conçu pour une haute pression WO2021035908A1 (fr)

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CN201910806977.5 2019-08-29
CN201910806977.5A CN112443715A (zh) 2019-08-29 2019-08-29 一种适用于高压的软硬管连接系统

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2433390Y (zh) * 1999-08-11 2001-06-06 乐清市金属软管厂 稠油注蒸汽用耐高温、高压金属软管
CN202746801U (zh) * 2012-06-13 2013-02-20 宋超辉 一种外覆增强防爆型食品专用波纹金属软管
CN205155380U (zh) * 2015-10-26 2016-04-13 焦作万瑞工贸有限公司 一种高温高压金属软管
CN205207957U (zh) * 2015-12-15 2016-05-04 石敢当 提高检测安全性的燃气波纹管
CN108302264A (zh) * 2018-04-04 2018-07-20 南京知行管业有限公司 一种抗压燃气输送用不锈钢波纹软管

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2433390Y (zh) * 1999-08-11 2001-06-06 乐清市金属软管厂 稠油注蒸汽用耐高温、高压金属软管
CN202746801U (zh) * 2012-06-13 2013-02-20 宋超辉 一种外覆增强防爆型食品专用波纹金属软管
CN205155380U (zh) * 2015-10-26 2016-04-13 焦作万瑞工贸有限公司 一种高温高压金属软管
CN205207957U (zh) * 2015-12-15 2016-05-04 石敢当 提高检测安全性的燃气波纹管
CN108302264A (zh) * 2018-04-04 2018-07-20 南京知行管业有限公司 一种抗压燃气输送用不锈钢波纹软管

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