CN218267789U

CN218267789U - Sealing flange joint for R744 refrigerant high-pressure air conditioner pipeline

Info

Publication number: CN218267789U
Application number: CN202221698257.5U
Authority: CN
Inventors: 张建华; 周忠良; 壮晓峰; 葛磊; 汪叶云; 李祥云
Original assignee: Changzhou Tenglong Auto Parts Co ltd
Current assignee: Changzhou Tenglong Auto Parts Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-01-10
Anticipated expiration: 2032-07-04

Abstract

The utility model belongs to the technical field of the sealed tube connects technique and specifically relates to a R744 refrigerant high pressure air conditioner pipeline sealing flange connects, including the male joint, the female joint, gasket and sealing washer, male joint fixed mounting is at the tip of managing one, female joint fixed mounting is at the tip of managing two, the protrusion is equipped with first bulge loop on the terminal surface of male joint, be equipped with the first sharp tooth of at least round on the terminal surface of first bulge loop, be equipped with sealed counter bore on the terminal surface of female joint, be equipped with the sealing washer mounting groove on the pore wall of sealed counter bore, and be equipped with the sharp tooth of at least round second on its bottom surface, the gasket is the soft metal material, the sealing washer is installed in the sealing washer mounting groove, and the suit is on first bulge loop, the male joint is connected with female joint fastening, realize the soft or hard pair recombination simultaneously and close sealedly, the sealing performance and the security performance of air conditioner pipeline have been improved greatly, adapt to the sealing connection under the high vibration state, the gasket warp evenly, satisfy the operation requirement of convenient dismouting in the finite space, gasket or the sealing washer change is convenient.

Description

Sealing flange joint for R744 refrigerant high-pressure air conditioner pipeline

Technical Field

The utility model belongs to the technical field of sealed coupling technique and specifically relates to a R744 refrigerant high pressure air conditioner pipeline sealing flange connects.

Background

In an automobile air conditioning system of common refrigerants (HFC-134 a and HFO-1234 yf), a rubber O-shaped ring sealing mode is adopted, the structure is simple, the cost is low, the installation is convenient, the working pressure of the system is generally 1.5-3.5MPa, the system belongs to a medium-low pressure system, and the rubber O-shaped ring can completely meet the use requirements in the aspects of sealing reliability and durability. However, in the case of a system having an operating pressure exceeding 6MPa, the durability of the rubber seal is significantly reduced, and the rubber is highly likely to leak under high internal temperature and pressure and vehicle body vibration, thereby causing system failure.

With the continuous promotion of the global energy-saving and emission-reduction policy, refrigerants with severe HFC-134a isothermal chamber effect are definitely eliminated within a limited time, and meanwhile, new energy vehicles represented by pure electric vehicles are different military projections, so that a heat pump system is increasingly standard for automobile air conditioners, and R744 (CO 2) has good heating performance, safety, environmental protection and low price and is a second choice of an electric vehicle heat pump system, but compared with a common HFC-134a refrigerant, the R744 has higher working pressure and reaches 7-12MPa, and the existing sealing structure cannot be applied.

Due to the space requirement in the automobile part, the compact design of automobile functional parts also strengthens the requirement, a new problem is created in the arrangement, connection and installation of air-conditioning pipelines, and the excessively complex sealing connection structure cannot meet the requirements of dismounting and mounting the air-conditioning pipelines in a limited space.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of above-mentioned current problem, the utility model provides a R744 refrigerant high pressure air conditioner pipeline sealing flange connects.

The utility model provides a technical scheme that its technical problem adopted is: the R744 refrigerant high-pressure air conditioner pipeline sealing flange joint comprises a male joint, a female joint, a gasket and a sealing ring, wherein the male joint is fixedly installed at the end part of a first pipe, the female joint is fixedly installed at the end part of a second pipe, a first convex ring is convexly arranged on the end surface of the male joint, at least one circle of first sharp teeth is arranged on the end surface of the first convex ring, a sealing counter bore is arranged on the end surface of the female joint, a sealing ring installing groove is formed in the hole wall of the sealing counter bore, at least one circle of second sharp teeth is arranged on the bottom surface of the sealing counter bore, the gasket is made of soft metal materials and is clamped between the first sharp teeth and the second sharp teeth, the sealing ring is installed in the sealing ring installing groove and is sleeved on the first convex ring, and the male joint is tightly connected with the female joint.

Specifically, by arranging the sealing ring and the gasket, when the male joint is tightly connected with the female joint, the first sharp tooth and the second sharp tooth are pressed into the side faces of the two sides of the gasket simultaneously, so that the gasket is plastically deformed, the male joint, the gasket and the female joint form a hard seal which is tightly attached, a high-temperature and high-pressure refrigerant can be borne, meanwhile, the sealing ring is extruded to form a second seal, soft and hard combined sealing is realized, the sealing performance and the safety performance of an air conditioner pipeline are greatly improved, and the sealing ring is suitable for sealing connection in a high-vibration state. Meanwhile, the sealing ring and the gasket can be preassembled in advance, so that the pipeline can be conveniently butted in a compact space, and the use requirement of convenient disassembly and assembly in a limited space is met. The sealing ring also has a dustproof effect. The group and the sealing structure with the main mechanical seal and the auxiliary rubber sealing ring for soft metal extrusion are integrally formed.

According to the utility model discloses a further embodiment, further include, the bilateral symmetry of male joint is equipped with two first side ears, the corresponding symmetry in both sides of female joint is equipped with two second side ears, first side ear passes through fastener fixed connection with second side ear. Through both sides fastener fixed connection, the cohesion is big, intensity is high between male joint and the female joint, improves sealed effect of hard seal, guarantees the sealing performance under the high vibration state. Under the symmetrical packing force, the shaping deformation of the gasket is uniform, the phenomenon that the local part is crushed due to overlarge stress is avoided, and the sealing reliability and durability are better.

According to the utility model discloses a further embodiment, further include, the outside that lies in first bulge loop on the terminal surface of male joint is equipped with the second bulge loop, fixed mounting has the nylon holder on the second bulge loop, the inboard of nylon holder is equipped with the installation annular, the gasket clamps in the installation annular, and the first tine of one side butt of it, the nylon holder is located sealed counter bore, the root of sealed counter bore is equipped with the groove of dodging that is used for dodging the nylon holder. Through setting up the nylon retainer, make the gasket adorn in advance on the terminal surface of male joint, can pre-install the sealing washer simultaneously to first bulge loop on, the nylon retainer blocks that the sealing washer drops, makes things convenient for male joint and female joint sealing connection. The nylon retainer is in small clearance fit with the sealing counter bore, so that the central positioning effect is achieved when the male connector and the female connector are connected, and an additional positioning pin is not needed.

According to the utility model discloses a further embodiment, further include, the second bulge loop is equipped with the draw-in groove with the junction of first bulge loop, the both ends inboard of nylon holder is equipped with first snap ring and second snap ring, enclose synthetic installation annular between first snap ring and the second snap ring, first snap ring clamps in the draw-in groove. The nylon retainer and the male connector are convenient to disassemble and assemble.

According to the utility model discloses a further embodiment, further include, the hole of first snap ring is the great taper hole in the outside, the corresponding chamfer conical surface that is equipped with of tip of second bulge loop. The nylon retainer is convenient to mount on the male connector.

According to another embodiment of the present invention, further comprising, the seal ring mounting groove is formed by a stepped hole on the female joint end face. The length of the sealing flange joint can be effectively shortened, the use requirement of space limitation is met, and meanwhile, the sealing ring is convenient to replace. When the male joint is tightly connected with the female joint, the thickness direction of the sealing ring also receives extrusion force, so that the pressure buffering effect is achieved, and the sealing and the fastening of the gasket are more uniform.

The beneficial effects of the utility model are that, the male joint, the gasket forms the hard seal of closely laminating with the female joint, can bear the highly compressed refrigerant of high temperature, the sealing washer also receives the extrusion to form the second and says sealedly simultaneously, it closes sealedly to realize soft or hard doublet simultaneously, the sealing performance and the security performance of air conditioner pipeline have been improved greatly, adapt to the sealing connection under the high vibration state, the gasket warp evenly, sealing washer and gasket can be preassembled in advance simultaneously, the convenience is in compact space pipeline butt joint, satisfy the operation requirement of making things convenient for the dismouting in the finite space, gasket or sealing washer are convenient to be changed, the sealing washer still has dustproof effect.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged view at X in FIG. 1;

fig. 3 is a left side view schematically illustrating the present invention.

In the figure, a first pipe 1, a second pipe 2, a male connector 3, a first convex ring 31, a second convex ring 32, a clamping groove 33, a first sharp tooth 34, a first side lug 35, a female connector 4, a sealing ring installation groove 41, a sealing counter bore 42, an avoiding groove 43, a second sharp tooth 44, a second side lug 45, a gasket 5, a nylon retainer 6, a first snap ring 61, a second snap ring 62, an installation ring groove 63, a sealing ring 7 and a fastener 8.

Detailed Description

Fig. 1-3 are the utility model discloses a structural schematic diagram, a R744 refrigerant high pressure air conditioner pipeline sealing flange connects, including male joint 3, female joint 4, gasket 5 and

sealing washer

7, 3 fixed mounting of male joint is at the tip of managing one 1, 4 fixed mounting of female joint are at the tip of managing two 2, the protrusion is equipped with first bulge loop 31 on the terminal surface of male joint 3, be equipped with the first pointed tooth 34 of at least round on the terminal surface of first bulge loop 31, be equipped with sealed counter bore 42 on the terminal surface of female joint 4, be equipped with sealing washer mounting groove 41 on the pore wall of sealed counter bore 42, and be equipped with at least round second pointed tooth 44 on its bottom surface, gasket 5 is the soft metal material, and presss from both sides and press from both sides between first pointed tooth 34 and second pointed tooth 44, sealing washer 7 is installed in sealing washer mounting groove 41, and the suit is on first bulge loop 31, male joint 3 and female joint 4 fastening connection.

The first pipe 1 and the second pipe 2 are both high-strength aluminum alloy pipes. The male joint 3 and the female joint 4 can also be made of aluminum alloy materials with higher hardness and are respectively connected with the first pipe 1 and the second pipe 2 in a welding mode.

The hardness of the male joint 3 and the female joint 4 is more than or equal to HV100, and the hardness of the gasket 5 is less than or equal to HV20. The hardness of the male joint 3 and the female joint 4 is more than five times of that of the gasket 5, so that the first pointed teeth 34 and the second pointed teeth 44 are prevented from being damaged when being extruded into the surface of the gasket 5, and the male joint and the female joint are more easily pressed into the gasket 5, and the sealing is more reliable and stable.

The sealing ring 7 may be an O-ring rubber sealing ring. The outer circle of the gasket 5 is in small clearance fit with the sealing counterbore 42 and can be pre-installed in the sealing counterbore 42. The sealing ring mounting groove 41 is an inner ring groove, the sealing ring 7 can be pre-installed in the sealing ring mounting groove 41, and the sealing ring 7 can prevent the gasket 5 from being separated from the sealing counter bore 42.

The outer circle of the gasket 5 can be drum-shaped, and the maximum outer circle size of the gasket is in interference fit with the sealing counter bore 42.

The first tine 34 and the second tine 44 may be triangular or semicircular in cross-section, and when triangular, the top thereof is provided with an arc. The first tine 34 and the second tine 44 may be arranged in a concentric multi-turn configuration.

The male joint 3 and the female joint 4 may be fastened by bolts through a plurality of axial bolt holes. Or by being sleeved on the male connector 3 by using a ferrule nut which is in threaded connection with the female connector 4.

Preferably, two first side ears 35 are symmetrically arranged on two sides of the male connector 3, two second side ears 45 are correspondingly symmetrically arranged on two sides of the female connector 4, and the first side ears 35 and the second side ears 45 are fixedly connected through fasteners 8. When the fastener 8 is locked, the two sides are alternately screwed. The fastener 8 may be a bolt.

Preferably, the outside that lies in first bulge loop 31 on the terminal surface of male joint 3 is equipped with second bulge loop 32, fixed mounting has nylon holder 6 on the second bulge loop 32, the inboard of nylon holder 6 is equipped with installation annular 63, gasket 5 clamps in installation annular 63, and the first tine 34 of its one side butt, nylon holder 6 is located sealed counter bore 42, the root of sealed counter bore 42 is equipped with the groove 43 of dodging that is used for dodging nylon holder 6.

The nylon cage 6 may be threaded with the second male ring 32.

Preferably, a clamping groove 33 is formed at the joint of the second protruding ring 32 and the first protruding ring 31, a first clamping ring 61 and a second clamping ring 62 are arranged on the inner sides of the two ends of the nylon retainer 6, an installation ring groove 63 is formed between the first clamping ring 61 and the second clamping ring 62 in a surrounding mode, and the first clamping ring 61 is clamped in the clamping groove 33.

The nylon retainer 6 can be a straight groove opening structure, so that the gasket 5 can be conveniently arranged and can be conveniently sleeved on the second convex ring 32.

Preferably, the inner hole of the first snap ring 61 is a tapered hole with a larger outer side, and the end of the second protruding ring 32 is correspondingly provided with a chamfer tapered surface.

Preferably, the packing installation groove 41 is formed by a stepped hole on the end surface of the female connector 4.

The foregoing description is intended to be illustrative, rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations, or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a R744 refrigerant high pressure air conditioner pipeline sealing flange connects, characterized by, includes male joint (3), female joint (4), gasket (5) and sealing washer (7), male joint (3) fixed mounting is in the tip of pipe (1), female joint (4) fixed mounting is in the tip of pipe two (2), the protrusion is equipped with first bulge loop (31) on the terminal surface of male joint (3), be equipped with first pointed tooth (34) of at least round on the terminal surface of first bulge loop (31), be equipped with sealed counter bore (42) on the terminal surface of female joint (4), be equipped with sealing washer mounting groove (41) on the pore wall of sealed counter bore (42), and be equipped with second pointed tooth (44) of at least round on its bottom surface, gasket (5) are soft metal material, and press from both sides between first pointed tooth (34) and second pointed tooth (44), sealing washer (7) are installed in sealing washer mounting groove (41), and are the suit on first bulge loop (31), male joint (3) and female joint (4) fastening connection.

2. The R744 refrigerant high-pressure air conditioner pipeline sealing flange joint as claimed in claim 1, wherein two first side lugs (35) are symmetrically arranged on two sides of the male joint (3), two second side lugs (45) are correspondingly symmetrically arranged on two sides of the female joint (4), and the first side lugs (35) and the second side lugs (45) are fixedly connected through fasteners (8).

3. The R744 refrigerant high-pressure air conditioner pipeline sealing flange joint as claimed in claim 1, wherein a second convex ring (32) is arranged on the outer side of the first convex ring (31) on the end surface of the male joint (3), a nylon retainer (6) is fixedly mounted on the second convex ring (32), a mounting ring groove (63) is arranged on the inner side of the nylon retainer (6), the gasket (5) is clamped in the mounting ring groove (63), one side surface of the gasket abuts against the first sharp tooth (34), the nylon retainer (6) is arranged in the sealing counter bore (42), and an avoiding groove (43) for avoiding the nylon retainer (6) is arranged at the root of the sealing counter bore (42).

4. The R744 refrigerant high-pressure air conditioner pipeline sealing flange joint as claimed in claim 3, wherein a clamping groove (33) is formed at the joint of the second convex ring (32) and the first convex ring (31), a first clamping ring (61) and a second clamping ring (62) are arranged on the inner sides of the two ends of the nylon retainer (6), a mounting ring groove (63) is defined between the first clamping ring (61) and the second clamping ring (62), and the first clamping ring (61) is clamped in the clamping groove (33).

5. The R744 refrigerant high-pressure air conditioner pipeline sealing flange joint as claimed in claim 4, wherein the inner hole of the first snap ring (61) is a taper hole with a larger outer side, and the end part of the second convex ring (32) is correspondingly provided with a chamfer conical surface.

6. The R744 refrigerant high-pressure air conditioner pipeline sealing flange joint as claimed in claim 1, wherein the sealing ring mounting groove (41) is formed by a step hole on the end face of the female joint (4).