CN222142339U - Soft and hard pipe connection structure of R744 air conditioner hose end - Google Patents
Soft and hard pipe connection structure of R744 air conditioner hose end Download PDFInfo
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- CN222142339U CN222142339U CN202420484417.9U CN202420484417U CN222142339U CN 222142339 U CN222142339 U CN 222142339U CN 202420484417 U CN202420484417 U CN 202420484417U CN 222142339 U CN222142339 U CN 222142339U
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000004378 air conditioning Methods 0.000 claims abstract description 17
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 210000000078 claw Anatomy 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000005219 brazing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000009954 braiding Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses a soft and hard pipe connecting structure of an end part of an R744 air-conditioning hose, which comprises an R744 air-conditioning hose, a soft and hard pipe connecting component, wherein the R744 air-conditioning hose comprises an innermost barrier layer, an inner rubber layer positioned at the outer side of the barrier layer, a reinforcing layer positioned at the outer side of the inner rubber layer and an outer rubber layer positioned at the outer side of the reinforcing layer, the barrier layer is a metal hose, the soft and hard pipe connecting component comprises a joint, a lining core and a riveting sleeve, one side of the joint is welded with the end part of the metal hose, the other side of the joint is inserted into the lining core connected with a hard pipe, a sealing ring is arranged between the joint and the lining core, the inner rubber layer, the reinforcing layer, the outer rubber layer and the outermost riveting sleeve are sequentially wrapped from inside to outside of the lining core, and the riveting sleeve is used for riveting the joint, the lining core and the inner rubber layer and the outer rubber layer to form a whole. The utility model has low cost, can meet the requirements of actual working conditions and the feasibility of the process, and is suitable for mass production.
Description
Technical Field
The utility model relates to an R744 air conditioner hose assembly, in particular to a soft and hard pipe connecting structure of an end joint of an R744 air conditioner hose, and belongs to the field of production and manufacturing of automobile air conditioner pipelines.
Background
Currently, the traditional HFCs refrigerant such as R134a and the like gradually reduce the usage amount, CO2 is used as an environment-friendly natural refrigerant, the refrigerant has the advantages of being nontoxic, stable, capable of being degraded naturally and the like, and gradually applied to the field of automobile air conditioners, meanwhile, with the development of new energy automobiles, pure electric automobiles are more and more widely accepted, because pure electric automobiles do not have an engine to provide a heat source, PTC or heat pump air conditioners are required to be used for heating, the PTC heating can cause higher energy consumption of a winter air conditioning system, the range of the electric automobile is obviously reduced, the range of the electric automobile is attenuated even more than 50% in winter, and the conventional heat pump system which currently applies the R134a refrigerant has low running efficiency in the environment below-15 ℃, CO2 is used as a refrigerant, has excellent heat pump performance, and can obviously increase the range of the electric automobile in winter. Compared with the traditional R134a air conditioning pipeline, the operating condition that the highest operating pressure of the R744 heat pump air conditioning pipeline is 17MPa and the temperature is 165 ℃ is far higher than that of the R134a pipeline, and the existing pipeline structure cannot meet the use requirement of R744.
Because the R744 heat pump air conditioning system has higher working temperature and pressure, and meanwhile, the system has extremely low requirements on permeation and leakage rate of all parts, the traditional rubber, plastic and the like are used as barrier materials, the low-permeation performance requirements of pipelines at high temperature can not be completely met, and the metal corrugated hose has certain bending fatigue resistance, and can completely block permeation of CO2 gas, and the temperature resistant range of the metal corrugated hose is far beyond the temperature of the working range of the R744 heat pump, so that the metal corrugated hose is used as a barrier layer of the CO2 rubber hose, and is a better scheme for solving the problem.
Disclosure of utility model
The utility model aims to provide a soft and hard pipe connecting structure of an R744 air conditioner hose end joint, which is used for meeting the actual working condition demands and the process feasibility, is suitable for mass production and meets the actual demands of mass production and low cost.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The soft and hard pipe connecting structure comprises an R744 air-conditioning hose and a soft and hard pipe connecting component, wherein the R744 air-conditioning hose comprises an innermost barrier layer, an inner layer rubber layer positioned on the outer side of the barrier layer, a reinforcing layer positioned on the outer side of the inner layer rubber layer and an outer layer rubber layer positioned on the outer side of the reinforcing layer, the barrier layer is a metal hose, the soft and hard pipe connecting component comprises a joint, a lining core and a riveting sleeve, one side of the joint is connected with the end of the metal hose in a welding mode, the other side of the joint is inserted into the lining core connected with the hard pipe, a sealing ring is arranged between the joint and the lining core, the outer side of the lining core is sequentially wrapped with the inner layer rubber layer, the reinforcing layer, the outer layer rubber layer and the outermost riveting sleeve from inside to outside, and the riveting sleeve is used for riveting the joint, the lining core and the inner layer rubber layer and the outer layer to form a whole.
Furthermore, the metal hose is a metal corrugated hose, and the metal corrugated hose is connected with the joint in a welding mode.
Further, the joint is made of stainless steel, annular conical protrusions are arranged on the outer surface of the joint and are attached to the lining core under the riveting effect, and the pulling-out resistance of the soft and hard tube connecting structure is further improved.
Further, the outer surface of the joint is provided with a groove for assembling a sealing ring.
Further, the tail end of the connector, which is connected with the metal hose, is provided with an annular limiting boss, the outer diameter of the annular limiting boss is consistent with that of the metal hose, and the other end of the connector is internally provided with an internal thread.
Furthermore, the lining core is made of aluminum alloy, the hard tube is an aluminum tube, and the connection mode of the lining core and the aluminum tube is one of flame brazing, laser welding, furnace welding and argon arc welding or the lining core is directly formed by directly forming the end part of the aluminum tube in an extrusion and spinning mode.
Further, the outer surface of the lining core is provided with 2 or more annular protrusions, the annular protrusions are attached to the inner layer rubber layer after being assembled, the lining core is assembled between the inner layer rubber layer and the joint, interference fit is formed between the lining core and the inner layer rubber layer, and clearance fit is formed between the lining core and the joint.
The inner rubber layer, the reinforcing layer, the inner rubber layer, the lining core, the sealing ring and the joint are tightly attached to form a fastened combination, meanwhile, the riveting sleeve is matched with the annular bulge of the lining core, the inward bulge formed after the riveting of the riveting sleeve is staggered with the annular bulge of the lining core, and the pulling-out resistance of the soft and hard pipe connecting structure is greatly improved.
The preparation method for connecting the soft pipe and the hard pipe at the end part of the R744 air conditioner hose comprises the following steps:
Cutting a metal corrugated hose according to a required length, and welding and connecting the end part with a joint;
The method comprises the steps of connecting a sleeve and a core rod through threads, penetrating the core rod into a welded corrugated pipe, connecting one end of the joint with the adapter through threads to form a minimum corrugated pipe connecting unit, connecting a plurality of minimum connecting units with internal threads of a second adapter through external threads at the end part of the core rod of a previous connecting unit, and connecting welded metal corrugated hoses with 2 joints through connecting tools to form a unit to be extruded;
Step three, extruding or cladding a rubber layer on the outer side of a unit to be extruded to form an inner layer rubber layer, wherein in the manufacturing process of extrusion, the head of an extruder is connected with a vacuumizing device to enable the inner layer rubber layer to be attached to a metal corrugated hose;
step three, braiding or winding the reinforcing layer on the outer side of the inner layer rubber layer, wherein the inner layer rubber layer is further attached to the metal corrugated hose and the connecting tool through a certain tensile force of the reinforcing layer braided wire in the braiding or winding process, and at the moment, the rubber of the inner layer is filled into each trough and each groove;
Extruding an outer rubber layer outside the reinforcing layer, wherein the outer rubber layer is mutually adhered with the reinforcing layer under the action of a subsequent vulcanization process, and simultaneously the outer rubber layer is mutually adhered with the inner rubber layer through gaps among the weaving lines of the reinforcing layer to form a mutually adhered whole;
Step five, calculating and confirming cutting positions of the vulcanized hose according to the lengths of the metal corrugated hose and the connecting tool, cutting the inner layer rubber and the outer layer rubber and the reinforcing layer, and taking out the connecting tool to form a plurality of hoses to be assembled;
Step six, assembling a sealing ring on the joint (the step can be carried out before the step two);
Step seven, installing a riveting sleeve and a lining core connected with a hard pipe at the end part of the hose to be assembled until an annular inward boss at the head part of the riveting sleeve is opposite to an annular groove of the lining core;
And step eight, riveting by using a riveting machine, wherein under the riveting action of riveting claws, the annular boss at the head part of the riveting sleeve is tightly matched with the annular groove to form a whole through extrusion deformation, and meanwhile, after the riveting sleeve is subjected to the extrusion deformation, the outer rubber layer, the reinforcing layer, the inner rubber layer, the lining core and the joint of the hose are extruded to form a tight soft and hard pipe connecting structure.
Wherein, plug, adapter, sleeve pipe are as the connection frock of hose connection, wherein:
The outer diameter of the core rod is smaller than the inner diameter of the corrugated pipe and the end connector thereof, and the two ends of the core rod are provided with external threads which are matched with the adapter;
The adapter is of a multi-section cylindrical hollow structure, an external thread is arranged at the outer side of one small-diameter end of the adapter and is used for being matched with the internal thread of the sleeve and the internal thread of the connector, an internal thread is arranged at the inner side of one small-diameter end of the adapter and is used for being matched with the external thread of the core rod, one large-diameter end of the adapter is of a thin-wall structure, the inner diameter of the adapter is larger than the outer diameter of the connector and is consistent with the outer diameter of a metal corrugated hose, and after the adapter is connected with the connector at the end part of the metal corrugated hose, the connector forms clearance fit with the connector;
The sleeve is of a cylindrical hollow structure, one end of the sleeve is internally provided with internal threads for matching with external threads of the adapter head end, and the inner diameter of the other end of the sleeve is larger than the outer diameter of the connector and is consistent with the outer diameter of the metal corrugated hose.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The structure of the utility model can adopt a mode of firstly assembling and then riveting the compression sealing ring, thereby well solving the problems that the sealing ring needs a certain compression amount when the rubber sealing ring is used for sealing, and meanwhile, in order to meet the sealing requirement of CO2 at high temperature and high pressure, the rubber material is required to have higher hardness, but the higher material hardness makes the higher compression amount difficult in the assembling process.
(2) The manufacturing process of the integral structure is simple, the cost is low, the control is easy, the integral structure is suitable for mass production, only the welded corrugated pipes are connected, the outer side is coated or extruded with the inner layer glue, the outer layer glue is woven and extruded, the integral structure is cut after vulcanization, and the integral structure is riveted after the sealing ring, the lining core and the aluminum sleeve are assembled, so that the cost is not obviously increased compared with the traditional air conditioner pipe production process.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic illustration of a welded joint and bellows;
FIG. 3 is a schematic view of a vulcanized cut rubber hose;
FIG. 4 is a schematic diagram of a metal corrugated hose and a connecting tool connected into a minimum connecting unit;
FIG. 5 is a schematic diagram of two minimum connection units connected;
FIG. 6 is a schematic view of a mandrel of one of the connection tools according to the present utility model;
FIG. 7 is a schematic view of an adapter of one of the connection tools according to the present utility model;
fig. 8 is a schematic diagram of a sleeve of one of the connecting tools according to the present utility model.
The drawing is marked by a 1-barrier layer, a 2-inner rubber layer, a 3-reinforcing layer, a 4-outer rubber layer, a 5-joint, a 5 a-annular limiting boss, a 5 b-annular conical protrusion, a 5 c-groove, a 5 d-joint end internal thread, a 6-sealing ring, a 7-lining core, an 8-rivet bush, a 9-aluminum pipe, a 10-core rod, a 10 a-core rod end thread, a 10 b-milling plane, a 11 a-sleeve end external thread, a 11 b-sleeve end internal thread, a 12-adapter, a12 a-adapter external thread, a12 b-adapter internal thread and a12 c-adapter thin wall.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
Example 1
As shown in fig. 1, the soft and hard tube connecting structure of the end part of the R744 air-conditioning hose comprises an R744 air-conditioning hose and a soft and hard tube connecting component, wherein the R744 air-conditioning hose comprises a blocking layer 1, an inner layer rubber layer 2 positioned on the outer side of the blocking layer 1, a reinforcing layer 3 positioned on the outer side of the inner layer rubber layer 2 and an outer layer rubber layer 5 positioned on the outer side of the reinforcing layer 3, the blocking layer 1 is a metal corrugated hose capable of completely blocking high-temperature and high-pressure CO 2 in the pipe body from penetrating outwards, the soft and hard tube connecting component comprises a joint 5, a lining core 7 and a riveting sleeve 8, one end of the joint 5 is connected with the end part of the metal corrugated hose 1 in a welding mode, the other end of the joint 5 is inserted into a lining core 7 used for being connected with a hard tube 9, as shown in fig. 2, a groove 5c is arranged on the outer side of the joint 5 and is provided with a sealing ring 6 to be matched with the inner side of the lining core 7, and after the lining core 7 is assembled between the joint 5 and the inner layer rubber layer 2, the outer side wall of the lining core 7 is sequentially wrapped with the inner layer rubber layer 2, the reinforcing layer 3, the outer layer 4 and the riveting sleeve 8 from inside to outside and the lining core 7, and the lining core 7 is connected with the lining core 7 through the riveting sleeve 7 and the lining core 7. As shown in fig. 2, the joint 5 and the metal hose 1 are welded together to form a whole after welding, so as to ensure good sealing performance and provide internal strength support when being riveted with the rivet sleeve 8.
Example two
The structure of the embodiment is basically the same as that of the embodiment, and the difference is that in order to improve the sealing performance of the riveted joint, two sealing ring grooves are arranged on the joint 5, and two sealing rings 6 are used for sealing the joint structure of the soft and hard pipes, wherein the two sealing rings respectively have better high temperature resistance and low temperature resistance;
Example III
A preparation method of soft and hard pipe connection at the end part of an R744 air conditioner hose comprises the following steps:
Cutting a metal corrugated hose according to a required length, and welding and connecting the end part with a joint;
The method comprises the steps of connecting a sleeve and a core rod through threads, penetrating the core rod into a welded corrugated pipe, connecting one end of the joint with the adapter through threads to form a minimum corrugated pipe connecting unit, connecting a plurality of minimum connecting units with internal threads of a second adapter through external threads at the end part of the core rod of a previous connecting unit, and connecting welded metal corrugated hoses with 2 joints through connecting tools to form a unit to be extruded;
Step three, extruding or cladding a rubber layer on the outer side of a unit to be extruded to form an inner layer rubber layer, wherein in the manufacturing process of extrusion, the head of an extruder is connected with a vacuumizing device to enable the inner layer rubber layer to be attached to a metal corrugated hose;
step three, braiding or winding the reinforcing layer on the outer side of the inner layer rubber layer, wherein the inner layer rubber layer is further attached to the metal corrugated hose and the connecting tool through a certain tensile force of the reinforcing layer braided wire in the braiding or winding process, and at the moment, the rubber of the inner layer is filled into each trough and each groove;
Extruding an outer rubber layer outside the reinforcing layer, wherein the outer rubber layer is mutually adhered with the reinforcing layer under the action of a subsequent vulcanization process, and simultaneously the outer rubber layer is mutually adhered with the inner rubber layer through gaps among the weaving lines of the reinforcing layer to form a mutually adhered whole;
Step five, calculating and confirming cutting positions of the vulcanized hose according to the lengths of the metal corrugated hose and the connecting tool, cutting the inner layer rubber and the outer layer rubber and the reinforcing layer, and taking out the connecting tool to form a plurality of hoses to be assembled;
Step six, assembling a sealing ring on the joint (the step can be carried out before the step two);
Step seven, installing a riveting sleeve and a lining core connected with a hard pipe at the end part of the hose to be assembled until an annular inward boss at the head part of the riveting sleeve is opposite to an annular groove of the lining core;
And step eight, riveting by using a riveting machine, wherein under the riveting action of riveting claws, the annular boss at the head part of the riveting sleeve is tightly matched with the annular groove to form a whole through extrusion deformation, and meanwhile, after the riveting sleeve is subjected to the extrusion deformation, the outer rubber layer, the reinforcing layer, the inner rubber layer, the lining core and the joint of the hose are extruded to form a tight soft and hard pipe connecting structure.
In this embodiment, the core rod 10, the adapter 11, and the sleeve 12 are used as a connection tool for connecting a soft pipe and a hard pipe, wherein:
The external diameter of the core rod 10 is smaller than the internal diameter of the corrugated pipe and the end joint thereof, and the two ends of the core rod are provided with external threads which are matched with the adapter;
The adaptor 11 is of a multi-section cylindrical hollow structure, an external thread is arranged at the outer side of one small-diameter end of the adaptor and is used for being matched with the internal thread of the sleeve and the internal thread of the connector, an internal thread is arranged at the inner side of one small-diameter end of the adaptor and is used for being matched with the external thread of the core rod, one large-diameter end of the adaptor is of a thin-wall structure, the inner diameter of the adaptor is larger than the outer diameter of the connector and is consistent with the outer diameter of a metal corrugated hose, and after the adaptor is connected with the connector at the end part of the metal corrugated hose, the connector forms clearance fit with the connector;
The sleeve 12 is of a cylindrical hollow structure, one end of the sleeve is internally provided with internal threads for matching with external threads of the adapter head end, and the inner side diameter of the other end is larger than the outer diameter of the connector and is consistent with the outer diameter of a metal corrugated hose.
As shown in fig. 4 to 8, the mandrel 10 and the adapter 12 are connected in a matching manner through external threads 10a at the end of the mandrel 10 and internal threads 12d at the end of the adapter 12, milling planes are respectively arranged at the outer sides of the mandrel 10 and the adapter 12 to provide support for the threaded connection of the mandrel 10 and the adapter 12, internal threads 11b at the end of the sleeve 11 and external threads 12a at the end of the adapter 12 are connected in a matching manner, milling planes at the outer sides of the sleeve 11 are used for providing support for the threaded connection of the adapter 12, 3 connecting tools are connected, internal threads 5d at the end of the adapter 5 and external threads 12 at the end of the adapter 12 are matched and connected through threads, and the end of the thin wall of the sleeve 11 is connected with the welded annular limiting boss 5a related to the adapter 5, the outer diameter of the sleeve 11 is consistent or basically consistent with the outer diameter of the corrugated hose, so that the consistency of the outer diameter of the extruded or encapsulated inner layer of the subsequent inner layer is ensured, the length of the mandrel is matched with the total length of the metal corrugated hose 1 after the welded adapter 5, and the mandrel 10, the sleeve 11 and the adapter 12 are connected with the metal corrugated hose after the welded adapter 5 are mutually connected, so as to form a minimum extruding unit.
As shown in fig. 5, two minimum units to be extruded are connected in a matching way through the thread 10a at the end part of the front core rod 10 and the internal thread 12b of the rear adapter 12, the end part of the adapter 12 is provided with a thin wall 12c which is in interference fit with the end joint 5 at the other side of the corrugated pipe of the last minimum connecting unit, the outer diameter of the thin wall 12c at the end part of the adapter 12 is consistent or basically consistent with the outer diameter of the metal corrugated hose, a plurality of minimum connecting units are mutually connected through the method, the outer side is extruded with a rubber layer, in the extrusion process, the extruder head is connected with a vacuumizing device, so that the inner layer rubber layer 4 is attached to the metal corrugated hose 1, the adapter 12 and the sleeve 11, and meanwhile, the outer side of the inner layer rubber layer 2 is provided with a reinforcing layer 3, the reinforcing layer 3 is formed by braiding or winding a steel wire, the reinforcing layer 3 is formed by preferentially braiding steel wires, and further copper plating steel wires are adopted in the braiding process, and in the braiding process, the inner layer rubber layer 2 extruded by an extruding machine is further in agreement with the metal corrugated hose 1, the inner layer rubber layer is filled into each trough and the trough, the stability of the metal corrugated hose is improved, and meanwhile, the problem that the steel wire is directly contacted with the metal corrugated hose is prevented from being worn by the steel wire, and the steel wire is directly contacting the metal corrugated hose, and the thin wall is directly contacting the corrugated hose, and the metal corrugated hose is prevented from being worn. The outer side of the reinforcing layer 3 is an extruded outer layer rubber layer 4, the outer layer rubber layer 4 is mutually adhered with the reinforcing layer 3 under the action of a subsequent vulcanization process, and meanwhile, the outer layer rubber layer 4 is mutually adhered with the inner layer rubber layer 2 through gaps among knitting lines of the reinforcing layer 3, so that a mutually adhered whole is formed, and the reinforcing layer has good mechanical properties on the basis of certain softness.
Cutting the outer layer glue 4, the reinforcing layer 3 and the inner layer glue 2 along the joint of the adapter 12 and the sleeve 11 according to the lengths of the actual metal corrugated hose and each connecting tool, taking out the connecting tools, and forming a cavity between the adapter 5 and the middle part of the inner layer glue 2;
Example IV
The third difference between the present embodiment and the third embodiment is that three connecting tools (10, 11, 12) are combined into a whole or three connecting tools (10, 11, 12) are integrated.
Example five
The third difference between this embodiment and the third embodiment is that the sealing ring 6 is assembled before the assembly fixture (10, 11, 12) is connected to the joint 5.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present utility model in any way, and all technical solutions obtained by equivalent substitution and the like fall within the scope of the present utility model. The utility model is not related in part to the same as or can be practiced with the prior art.
Claims (8)
1. The soft and hard pipe connecting structure of the end part of the R744 air-conditioning hose comprises an R744 air-conditioning hose and a soft and hard pipe connecting component, wherein the R744 air-conditioning hose comprises an innermost barrier layer, an inner layer rubber layer positioned on the outer side of the barrier layer, a reinforcing layer positioned on the outer side of the inner layer rubber layer and an outer layer rubber layer positioned on the outer side of the reinforcing layer.
2. The hose-end hose-connecting structure for R744 air conditioner of claim 1, wherein the metal hose is a metal corrugated hose, and the metal corrugated hose is connected with the joint by welding.
3. The soft and hard pipe connection structure of the end part of the R744 air conditioner hose according to claim 1, wherein the joint is made of stainless steel, and annular conical protrusions are arranged on the outer surface of the joint and are attached to the lining core under the riveting effect, so that the pulling-out resistance of the soft and hard pipe connection structure is further improved.
4. The hose-end hose-connecting structure for R744 air conditioner of claim 1, wherein the joint outer surface is provided with grooves for fitting the sealing rings.
5. The flexible hose end part connecting structure for R744 air conditioner according to claim 1, wherein the tail end of the connector connected with the metal hose is provided with an annular limiting boss, the outer diameter of the annular limiting boss is consistent with the outer diameter of the metal hose, and the other end of the connector is internally provided with an internal thread.
6. The soft and hard tube connecting structure of the end part of the R744 air-conditioning hose according to claim 1, wherein the lining core is made of aluminum alloy, the hard tube is an aluminum tube, and the lining core and the aluminum tube are connected in one of flame brazing, laser welding, furnace welding and argon arc welding or the lining core is directly formed by directly forming the end part of the aluminum tube in an extrusion and spinning mode.
7. The soft and hard pipe connection structure of the end part of the R744 air-conditioning hose according to claim 1, wherein the outer surface of the lining core is provided with 2 or more annular protrusions, the annular protrusions are attached to the inner layer rubber layer after assembly, the lining core is assembled between the inner layer rubber layer and the joint, and forms interference fit with the inner layer rubber layer and clearance fit with the joint.
8. The soft and hard pipe connecting structure of the end part of the R744 air conditioner hose according to claim 1 is characterized in that annular grooves are formed in the outer surface of the end part of the connecting side of the lining core and the aluminum pipe, the riveting sleeve is an iron sleeve or an aluminum sleeve, an inward annular boss is arranged at the head part of the riveting sleeve and embedded in the annular grooves, after riveting under the action of riveting claws, the riveting sleeve is inwardly molded and deformed to form a plurality of grooves which are uniformly distributed in the circumferential direction, and an outer rubber layer, a reinforcing layer, an inner rubber layer, the lining core, a sealing ring and a joint are extruded, so that all parts in the riveting sleeve are tightly attached to form a fastened combination body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420484417.9U CN222142339U (en) | 2024-03-13 | 2024-03-13 | Soft and hard pipe connection structure of R744 air conditioner hose end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420484417.9U CN222142339U (en) | 2024-03-13 | 2024-03-13 | Soft and hard pipe connection structure of R744 air conditioner hose end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222142339U true CN222142339U (en) | 2024-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420484417.9U Active CN222142339U (en) | 2024-03-13 | 2024-03-13 | Soft and hard pipe connection structure of R744 air conditioner hose end |
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| Country | Link |
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| CN (1) | CN222142339U (en) |
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- 2024-03-13 CN CN202420484417.9U patent/CN222142339U/en active Active
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