KR200344287Y1 - Pipe Flexible Connecting Structure for Cars - Google Patents

Abstract

The present invention relates to a flexible pipe joint of a vehicle for maintaining the pipes connected to various engines such as engine oil or coolant and air conditioner of the vehicle intact, the flexible pipe joint structure of the vehicle pipe of the present invention A tube 10 having a washer fitting groove 111 formed of a round ring groove bent toward the inner diameter side of the expansion pipe portion 11 having an enlarged diameter and the free end portion of the expansion pipe portion 11;

A joint pipe 20 having a packing groove 21 formed by a concave groove having an annular shape by projecting two rows in a ring shape with a diameter equal to the diameter of the pipe 10 to be connected and having a predetermined length at a predetermined height on the outer peripheral surface of both ends. )and,

The packing ring 30 is inserted into the packing groove 21 is made of a material having elasticity and elasticity and has a ring shape, the thickness of which is longer than the height of the packing groove 21;

The stop washer 40 is formed in a coin shape and has a through-hole formed in the center thereof, and is inserted into the washer fitting groove 111 of the expansion pipe 11 forming the end of the pipe 10 to be connected. ) And the fitting pipe 20 is composed of a stop washer 40 is inserted into each other so as not to be disassembled.

Description

Pipe Flexible Connecting Structure for Cars

The present invention relates to a flexible pipe joint of a vehicle for maintaining the pipes connected to various engines such as engine oil or coolant and air conditioner of the vehicle intact.

Vehicles, such as automobiles, are provided with a number of pipes connecting the engines.These pipes are connected to the pipes due to vibration caused by the running of the vehicle and changes in pressure and heat generated from fluids such as gas or oil flowing inside the pipes. This leads to detachment of the joints leading to the tubes or to deformation of the tubes leading to them. The joints of the pipes may be partially assembled and connected, but in order to completely prevent the leakage of fluid, it is common to weld the pipe to the flange of the engine. However, the joints of the pipes by such welding are brittle, and their physical properties are brittle, and even small vibrations of the car cause cracks in the welded parts, or they are broken or severely detached. When the expansion force and contraction force by pressure are applied, the welded joint is not elastic and brittle, so the pipe is deformed and defects are generated. . Therefore, the flexible pipe portion of the automobile pipe is required to absorb the shock in response to the vibration of the vehicle, and to easily absorb the repeated contraction or expansion force due to the heat change or pressure of the fluid.

FIG. 5 of the present invention shows a pipe joint by a conventional rubber tube replacing a pipe joint by welding in order to cope with detachment or deformation of the pipe due to the above-mentioned vibration, fluid pressure, or heat change.

The pipe joint part of the conventional rubber pipe of FIG. 5 pipes the rubber pipe 200 to the joint portion connecting the pipe 100 and the pipe 100 divided into two sides, and each pipe ( While the end of 100 is inserted and coupled, at this time to cover the metal cap 300 made by bending the plate-like metal of the flexible material on the outer periphery of both ends of the rubber tube 200 for a tight and tight coupling of the joint portion The outer circumferential surface is crimped. Therefore, the rubber pipe 200 is interposed between the outer metal cap 300 and the inner pipe 100 to maintain an extremely tight coupling state between each other.

Such a conventional structure is that the impact applied to the pipe installed by connecting the pipe 100 and the pipe 100 during the vibration of the vehicle is immediately transmitted to the rubber pipe 200 and at this time the rubber pipe 200 flows flexibly to the impact On the other hand, since the rubber tube 200 expands or contracts properly even when the pipe is expanded or contracted due to the pressure or heat change of the fluid, the metal tube 100 and the tube 100 welded to both flanges are greatly affected. Not crazy However, the structure in which the rubber pipe 200 is formed at the connection portion of the pipe as described above generally works well to prevent the deformation of the pipe due to the fixed state and the absorption of the shock to the vibration and the heat change of the fluid. Many problems are pointed out.

The rubber tube 200 is extremely difficult to mix the components to be molded in the form of a round pipe as a rubber material. Since the field of use is extremely limited, there is a remarkable difference in the quality of the product compared to the rubber ring packing that is currently used. In other words, it is difficult to form rubber in the form of a round pipe structure, and thus, it is difficult to mix additives such as styrene butadiene rubber and chloropurene rubber to improve the quality of the product during the molding process. It is not reaching the extremely desired level. Therefore, the conventional rubber tube is easily sintered by the toxicity or heat change of the fluid flowing through the pipe and leaks the fluid. In particular, the rubber tube 200 is easily sintered in contact with the connecting end of the tube 100 and the tube 100. As shown by the dotted arrows in the fluid is leaking to the outside through the gap between the rubber tube 200 and the tube 100. Therefore, the rubber tube of the above-described conventional structure maintains some safety at the beginning, but when used for a long time, fluid leakage gradually occurs, requiring frequent repair and replacement, and in particular, the rubber tube is press-bonded in a wave shape by the metal cap 300. Therefore, there is a problem that separate replacement is very cumbersome.

The present invention was devised to solve the problems of the pipe joint of the conventional rubber pipe, the pipe joint of the pipe connecting the pipe using a corrugated metal pipe instead of a conventional rubber pipe, The airtight means of the pipe is to use the rubber packing on the ring, and the pipe and tube inserted in the connected pipe connected to the pipe joint are deflected to a considerable angle range by adjusting the expansion capacity of the pipe which is connected to the joint. It is a feature to provide a flexible pipe joint structure that can absorb the expansion force and contraction force caused by the impact force on the surface or the pressure and temperature of the fluid flowing through the pipe.

1 is a cross-sectional view of a first embodiment according to the present invention

Figure 2a-c is an operating state of the first embodiment according to the present invention

3 is a cross-sectional view of a second embodiment according to the present invention

Figure 4a-b is an operating state of the second embodiment according to the present invention

Figure 5 is an enlarged cross-sectional configuration of the main portion of the conventional automobile pipe joints

<Description of Symbols for Major Parts of Drawings>

10: tube 11, 210: expansion tube

20: joint pipe 110, 21: packing groove

30: packing ring 40: stop washer

111, 211: washer fitting groove

The flexible pipe joint according to the present invention basically consists of a pipe 10 to be connected and a joint pipe 20 constituting the pipe joint, and an annular packing ring 30 and an annular stop washer 40. do.

Figure 1 shows a first embodiment constituting a flexible pipe joint according to the present invention, to expand the diameter to the end of the tube 10 to be connected to form an expansion pipe 11, expansion pipe ( 11, the free end is bent toward the inner diameter side is formed with a washer fitting groove 111 of a round ring groove.

The joint pipe 20 constituting the pipe joint of the pipe connecting the pipe 10 and the pipe 10 has a predetermined length smaller than the diameter of the expansion pipe 11 of the pipe 10 of the pipe. The packing grooves 21 are formed by forming a ring shape with two lines protruding in a ring shape at a predetermined height on the outer circumferential surface of both ends with a tube.

The packing ring 30 has a ring shape but has a thickness longer than that of the packing groove 21 and is inserted into the packing groove 21 of the joint pipe 20 to join the pipe and the pipe in the pipe fitting structure. This is to ensure confidentiality. The physical properties of the packing ring 30 require considerable heat resistance and durability, high elasticity and high elastic restoring force rather than flexibility, and should be easy to mold. Therefore, the material of the packing ring 30 should be adjusted to its physical properties as additives using natural rubber as the main raw material. Since the ring packing 30 has a strong original return force and is maintained for a long time, the ring packing 30 is press-fitted between the inner circumferential surface of the expansion pipe 11 of the pipe 10 which is inserted into and connected to the packing groove 21 of the joint pipe 20. Ensure the tightness of the joint.

The stop washer 40 is formed in a coin shape and has a through-hole formed in the center thereof, and is inserted into the washer fitting groove 111 of the expansion pipe 11 forming the end of the pipe 10 to be connected. ) And the fitting pipe 20 is inserted into each other so as not to be disassembled.

The operating state of the first embodiment for implementing a flexible pipe joint according to the present invention having such a configuration is shown in Figure 2 (a) to (c), which implements a flexible pipe joint according to the present invention In the first embodiment, when vibration occurs in the vehicle, one or both of the pipes 10 are bent in the direction of mitigating the impact at the connection portion of the pipe 20, absorbing the shocks. It is present.

1 and 2 is a structure in which a metal fitting pipe 20 is coupled to an expansion pipe portion 11, which is an end portion of a pipe 10 to be connected, which is a pipe 10. And the joint pipe 20 is not a structure directly connected to each other, the ring packing 30 of both ends of the joint pipe 20 is simply fitted into the inner circumferential surface of the expansion pipe portion 11 of the pipe 10 divided into two sides. Therefore, such a structure indicates that the expansion pipe part 11 of the pipe 10 may flow back, front, left, and right by an external impact with respect to the joint pipe 20 fixed to the vehicle body with the fixing bracket 50. . And even if the packing ring 30 of the connecting pipe 20 is simply fitted into the inner peripheral surface of the expansion pipe 11 of the pipe 20, the strong sealing force of the ring packing 30 is maintained, while maintaining a good sealing function at the close contact portion. Since the inner circumferential surface of the expansion pipe 11 is easily slid by the outer circumferential surface of the smooth ring packing 30, the pipe 20 can be easily bent in the impact direction to which the expansion pipe 11 is applied from the outside as described above. Therefore, the present invention, when the tube 20 is vibrated due to the driving of the car, the tube 20 slides up and down while the inner circumferential surface of the expansion pipe 11 slides on the outer circumferential surface of the packing ring 30 of the joint pipe 20. The elasticity of the refraction freely to the left and right to absorb the vibration. The car continuously generates vibrations while driving, and the degree and direction of the vibrations are very diverse and repetitive. When the vibration is applied in various directions and repeated in this way, the connection part with the joint pipe 20 is continuously refracted while being compliant in the direction in which the impact is applied, so that the shock is effectively absorbed in the pipe 10. On the other hand, the shock absorbing action while maintaining the welded portion of the pipe 10 connected to the device is intact and prevents detachment of the welded portion, thereby enabling long-term use of the pipe.

The pipe 10 of the pipe also varies in the degree of refraction of the expansion pipe 11 according to the degree of vibration, and as shown in FIG. 2 (a) according to various vibration conditions such as the direction in which the vibration is applied together with the degree of vibration. Only one end of the tube 10 may be refracted up and down or left and right, or as shown in FIG. 2 (b), both of the tubes 20 may be bent up, down, left, or right. Of course, the up, down, left, right free refraction of the expansion pipe 11, that is, the connection end of the pipe 10 is continuously operated while the vibration is applied to the vehicle body.

FIG. 2C shows that the tube 10 expands or contracts due to a change in pressure or heat of a fluid flowing inside the tube 10. When expansion and contraction of the tube 10 is required by the pressure or the heat change of the internal fluid, the tube 10 of the present invention is disconnected from each other only as the expansion part 11, the connecting end thereof, is connected to the joint pipe 20. Because of the divided state, the expansion or contraction of the longitudinal direction or expansion is made smoothly. At this time, the internal influence due to the fluid reaches the entire pipe 10 but is concentrated in a physically weak part, so in the case of the present invention, the expansion pipe part 11 having a large inlet and no direct connection part expands and contracts. Therefore, the pipe 10 of the first embodiment according to the present invention, when there is a pressure or heat change of the fluid, as shown in the drawing, the expansion pipe 11 shows the expansion and contraction of the longitudinal direction and the expansion or contraction thereof. Perform expansion and contraction functions without difficulty. And when the diameter of the expansion pipe 11 is expanded, the joint pipe 20 is also expanded, so that the ring packing 30 does not fall from the inner circumferential surface of the expansion pipe 11 of the pipe 10, and in some cases, the pipe 20 The expansion degree of may be somewhat smaller than the expansion part 11, in this case good and close close contact between the packing ring 30 and the inner peripheral surface of the expansion pipe 11 by the expansion of the ring packing 30 to be restored to its original state is continued Is maintained. On the contrary, when the diaphragm 11 is contracted and the diameter thereof is reduced, the diameter of the fitting tube 20 is also reduced, so that the state of close contact between the packing ring 30 and the diaphragm 11 remains unchanged. If 20) is made smaller than the expansion pipe 11, the inner circumferential surface of the expansion pipe 11 is further compressed to the outer ring of the packing ring 30, and there is no problem in maintaining the airtightness. In this way, the present invention, when a pressure change or heat change inside the tube 10 is caused by oil or gas flowing inside the tube 10, the tube 10, in particular, the expansion tube 11 at its end is expanded and unreasonably. Since the contraction does not cause deformation of the tube 10 and also performs good expansion and contraction as described above, good adhesion with the packing ring 30 is continued, so that the airtightness of the tube 10 is continuously maintained.

Figure 3 shows a second embodiment as another embodiment of the present invention, unlike the first embodiment described above, the end portion of the pipe 10 of the pipe to be formed and connected to the expansion pipe portion 210 in the joint pipe 20 The packing groove 110 is formed on the outer circumferential surface to insert the packing ring 30. The packing ring 30 is inserted into the packing groove 110 formed on the outer circumferential surface of the connection end of the pipe 10 to which the packing ring 30 is to be connected, While extending both ends of the (20) to configure the expansion pipe 210, while the connecting end of the pipe 10 is inserted into the expansion pipe 210 of the joint pipe 20, the packing ring 30 is expanded pipe ( It is a structure that is closely coupled to the inner peripheral surface of 210. The free end of the expansion pipe portion 210 is bent toward the inner diameter to form a washer fitting groove 211 into which the stop washer 40 is inserted, thereby coupling the stop washer 40 to the joint pipe 20 to the pipe 10. To prevent detachment.

The automatic state of the second embodiment of the present invention shown in Figure 3 is shown in Figures 4a and 4b, the second embodiment comprises an expansion pipe 210 at both ends of the joint pipe 20 and the ring The packing 30 is inserted into the packing groove 110 formed on the outer peripheral surface of the connection end of the tube 10 to be connected, and the connection end of the tube 10 is inserted into the expansion pipe portion 210, and at this time, the ring packing 30 is in close contact with the inner peripheral surface of the expansion portion 210 of the fitting pipe (20). Such a coupling structure of the pipe 20 and the joint pipe 20 is a structure generally opposed to the configuration of FIG. 1 which is the basis of the present invention, and optionally by the condition of the type of vehicle or the demand of the consumer. It is composed. In FIG. 3, when an impact is applied to the tube 20 by the vibration of the vehicle, one end of the tube 10, that is, a connection end connected to the joint tube 20, as shown in FIG. It acts to be refracted while acclimatizing in the applied direction. That is, even in FIG. 3, the free refraction of the up, down, left, and right according to various impact conditions is performed. However, in the case of FIG. 1, the pipe 10 of the pipe bends outside of the joint pipe 20. Only the point of refraction inside the difference is different, the effect is almost the same. In addition, the embodiment of FIG. 3 is only a difference in the basic structure and the connection structure of FIG. 1, the coupling structure using the coupling structure and packing ring 30 of the pipe 10 and metal joint pipe 20 divided into both sides, etc. As the structure of the very same category, the above-mentioned up and down, left and right refraction as well as the expansion and contraction of the tube 10 acts the same, so the description of the expansion and contraction of the tube 10 of FIG. 3 is omitted.

Reference numeral 50 denotes a fixing bracket for fixing the connector to the vehicle body.

Packing ring 30, which is commonly applied to the embodiment of the present invention, is made of natural rubber as a main raw material, and since it has been widely used in various industrial fields for a long time, considerable technology has been accumulated and the molding means is simple, so that additives such as styrene-butadiene Easy to mix Therefore, the packing ring 30 is provided as a high quality product having excellent heat resistance, durability and good elasticity compared to the rubber tube adopted in the above-described conventional configuration. This shows that although some of the components of the present invention use the rubber packing ring 30, there is no concern about thermal plasticity due to the excellent heat and durability as described above. Furthermore, the packing ring 30 is returned to its original state. Since the force is strong and maintained for a long time to ensure perfect and long-term airtightness in close contact with the inner peripheral surface of the expansion portion (11, 210) of each embodiment.

Unlike the conventional tube-type rubber tube as described above, the packing ring 30 is easy to be molded together with the accumulated technology, so that it is easy to mix the additive added to about 20% of the natural rubber during manufacture, and thus have excellent heat resistance and durability. Can be. Accordingly, the present invention provides the related configuration of the metal fitting pipe 20 by using the packing ring 30, and is not fired by the fluid, and expects a long term use of the pipe with excellent sealing effect.

Expansion stops (11, 210) inlet of each embodiment of the present invention is coupled to the stop washer (40). If the pipe 10 and the joint pipe 20 may be detached due to a car accident or severe vibration, in this case, the stop washer 40 is a packing groove 21 and 110 for fixing the ring packing 30. Since the control is caught on the protruding end of the), the connection between the pipe 10 and the joint pipe 20 is prevented from being detached. Therefore, such a mutual departure prevention structure to prevent the expected fire, such as when outflow of the fluid due to the detachment of the pipe (10) and the fitting pipe (20).

In constructing the flexible pipe joint structure of the present invention, by providing a related structure of metal joint pipe and ring packing, it effectively absorbs the impact force applied to the pipe due to the vibration of the vehicle with excellent airtightness effect. In addition, due to the good expansion and contraction function, the pipe is prevented from being deformed or detached, while the pipe is kept intact for a long time and the fluid is completely prevented from leaking. In addition to the effect, the driver's psychological stability can greatly help safe driving.

Claims (2)

Expansion pipe 11 and the free end of the expansion pipe portion 11 having an enlarged diameter at the end is bent toward the inner diameter side is connected to the tube 10 is formed with a washer fitting groove 111 formed of a round ring groove, A joint pipe 20 having a packing groove 21 formed by a concave groove having an annular shape by projecting two rows in a ring shape with a diameter equal to the diameter of the pipe 10 to be connected and having a predetermined length at a predetermined height on the outer peripheral surface of both ends. )and, The packing ring 30 is inserted into the packing groove 21 is made of a material having elasticity and elasticity and has a ring shape, the thickness of which is longer than the height of the packing groove 21; The stop washer 40 is formed in a coin shape and has a through-hole formed in the center thereof, and is inserted into the washer fitting groove 111 of the expansion pipe 11 forming the end of the pipe 10 to be connected. ) And the pipe fitting structure of the vehicle pipe consisting of the stop washer 40 is inserted into each other so as not to be disassembled 2. The washer fitting groove 211 according to claim 1, wherein expansion pipes 210 are formed at both ends of the fitting pipe 20, and free ends of the expansion pipes 210 are bent to the inner diameter side and the stop washers 40 are inserted therein. ) Is formed, the flexible pipe joint structure of the vehicle pipe formed with a packing groove (110) in which the packing ring 30 is inserted into the outer peripheral surface of the connecting end of the pipe (10) of the pipe