Flexible joint for a railway vehicle

Abstract

The present application relates to a kind of joints, in particular to a kind of flexible joint for railway vehicle.The present application aims to solve the technical problem that existing pipe joint is difficult to fully meet the installation and use requirements of railway vehicle, and provide a kind of flexible joint for railway vehicle.The present application adopts thread sealing, clamp sealing combined with sealing groove sealing, and has good sealing effect, can adapt to high frequency vibration, solves the welding crack problem caused by vehicle vibration in the prior art, so it can be used for railway passenger cars and freight transport, especially suitable for railway freight transport.By sleeving the elastic sleeve into the joint body, the joint body is connected with the ring sleeve by thread connection, so as to press the clamp and the elastic sleeve, and the joint body is welded with the brake pipe, which has simple structure, reliable connection and good sealing;Flexible connection mode is adopted, which is light in weight, elastic, and has a certain amount of displacement in all directions, thereby solving the problem of strong assembly, and the assembly requirement and difficulty are lower, the process is simple, disassembly and assembly are convenient, and easy to overhaul.

Description

TECHNICAL FIELD

[0001] The present application relates to a joint, in particular to a flexible joint for railway vehicles. BACKGROUND

[0002] The brake device is one of the five basic parts of a railway vehicle, and is an essential device for ensuring accurate stopping and safe operation of a train. The brake device produces corresponding actions through changes in compressed air pressure in the train main pipe. The propagation of compressed air requires a brake pipe to be implemented. Due to differences in vehicle structure and brake device structure, the brake pipe needs to be connected by a plurality of brake pipes and their joints.

[0003] The existing brake pipe joints mainly have the following two types:

[0004] One is a threaded pipe joint, mainly used for railway passenger cars. This joint has the following problems:

[0005] 1. High assembly requirements and great difficulty, requiring winding of sealing materials, more processes, time-consuming and labor-intensive;

[0006] 2. Poor threaded sealing effect, especially after high-frequency vibration, the sealing effect of the threads will be worse, so that railway freight cars with strong vibration cannot use threaded sealed joints;

[0007] 3. Not easy to maintain, when the pipe system is maintained, it may be necessary to remove a plurality of brake pipes connected to the joint;

[0008] The other is a flange connected pipe joint, mainly used for railway freight cars. The flange connection is to weld the joint with the brake pipe and then connect it with bolts. Compared with threaded connection, the assembly requirements are reduced, and the sealing effect is also guaranteed to a certain extent, but new problems have appeared in use:

[0009] 1. The flange connection is a rigid connection, and the flange joint is much heavier than the threaded joint. Due to the vibration during vehicle operation, the weld at the joint may crack;

[0010] 2. The brake pipe needs to be fixed to the vehicle by a pipe hanger. When fixing this rigid structure, strong assembly is inevitable, which may exacerbate the possibility of weld cracking at the joint;

[0011] 3. The E-shaped sealing ring used in flange connection is easy to break during assembly, and the breakage is not easy to find, which may cause air leakage during vehicle operation, thereby affecting the safety of train operation. SUMMARY

[0012] The purpose of the present application is to solve the technical problem that the existing pipe joint cannot fully meet the installation and use requirements of railway vehicles, and to provide a flexible joint for railway vehicles.

[0013] To solve the above technical problems, the technical solutions provided by the present application are as follows:

[0014] A flexible joint for a railway vehicle, characterized in that:

[0015] The flexible joint comprises an elastic sleeve provided with N outlet ends, N joint bodies and N ring sleeves; N≥2;

[0016] One end of each of the N joint bodies is connected to the N outlet ends of the elastic sleeve, and the other end is connected to one end of N brake pipes of the railway vehicle; and the end of each of the N joint bodies is sleeved on the inside of the N outlet ends of the elastic sleeve;

[0017] Each of the N ring sleeves is simultaneously sleeved on the outside of a joint body and the outside of an outlet end of the elastic sleeve connected to the joint body, and presses the two.

[0018] Further, the N outlet ends of the elastic sleeve are each provided with an inflation groove;

[0019] The air inlet of each of the N inflation grooves is arranged on the inner wall of the elastic sleeve at a position not in contact with the outer wall of the joint body.

[0020] Further, the inflation groove is an annular groove arranged around the entire circumference of the outlet end of the elastic sleeve;

[0021] The air inlet is arranged along the circumference of the inner wall of the outlet end of the elastic sleeve.

[0022] Further, the two groove walls of the inflation groove close to and away from the joint body are parallel to each other in a free state without deformation.

[0023] Further, the outer wall of the end of the joint body away from the elastic sleeve is provided with external threads;

[0024] One end of each of the ring sleeves is provided with an inward flange;

[0025] The inner wall of the flange is provided with internal threads matched with the external threads of the joint body.

[0026] Further, the other end of each of the ring sleeves is provided with a hoop groove on the inside, and a hoop is arranged in the hoop groove.

[0027] Further, the middle section of the elastic sleeve is spherical or bellows-shaped.

[0028] Further, the outer wall of the end of the joint body close to the elastic sleeve is a first protruding structure expanded outward, used for cooperating with the outlet end of the elastic sleeve.

[0029] Further, the elastic sleeve is straight-through or is a bend with different angles;

[0030] Said N is equal to 2 or 3 or 4.

[0031] Further, the joint body is used for welding connection with the brake pipe.

[0032] The present application has the beneficial effects compared with the prior art:

[0033] 1. The flexible joint for railway vehicle provided by the present application, by sleeving the elastic sleeve into the joint body, the joint body is threadedly connected with the ring sleeve, thereby pressing the clamp and the elastic sleeve, and the joint body is welded with the brake pipe, so that the structure is simple, the connection is reliable, and the sealing is good.

[0034] 2. The flexible joint for railway vehicle provided by the present application, which adopts the combination of thread sealing, clamp sealing and sealing groove sealing, has good sealing effect and can adapt to high-frequency vibration, solves the welding crack problem caused by vehicle vibration in the prior art, and can be used for railway passenger cars and freight cars, especially for railway freight cars.

[0035] 3. The flexible joint for railway vehicle provided by the present application adopts a flexible connection mode, is light in weight, has elasticity, and allows a certain amount of displacement in each direction, thereby solving the problem of strong assembly.

[0036] 4. The flexible joint for railway vehicle provided by the present application has low assembly requirements and difficulty, simple process, and saves time and effort.

[0037] 5. The flexible joint for railway vehicle provided by the present application is convenient to disassemble and assemble, and easy to maintain, and when the pipe system is maintained, the corresponding joint body can be disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structure schematic view of the flexible joint for railway vehicle of the present application assembled with the brake pipe;

[0039] Figure 2 is a partial enlarged view of Figure 1 ;

[0040] Figure 3 is a structure schematic view of the joint body of the flexible joint for railway vehicle of the present application;

[0041] Figure 4 is a structure schematic view of the ring sleeve of the flexible joint for railway vehicle of the present application;

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 1-elastic sleeve, 2-joint body, 3-clamp, 4-ring sleeve, 5-brake pipe, 6-inflation groove. DETAILED DESCRIPTION

[0044] The application will be further described below in connection with the drawings and specific embodiments.

[0045] The flexible joint scheme of the application is proposed to improve the problems of strong assembly during assembly of the brake pipe and joint failure caused by vibration during operation of the vehicle by investigating and analyzing the structure of the existing railway vehicle brake pipe joint and comparing the advantages and disadvantages of various types of joints.

[0046] A flexible joint for a railway vehicle, as shown in the specific structure Figure 1 , comprises an elastic sleeve 1 provided with N outlet ends, N joint bodies 2 and N ring sleeves 4; N≥2; one end of the N joint bodies 2 is connected to the N outlet ends of the elastic sleeve 1 respectively, and the other end is connected to one end of N brake pipes 5 of the railway vehicle respectively; and the end part of the N joint bodies 2 is sleeved on the inside of the N outlet ends of the elastic sleeve 1; each of the N ring sleeves 4 is simultaneously sleeved on the outside of one joint body 2 and the outlet end of the elastic sleeve 1 connected to the joint body 2, and presses the two tightly; the N outlet ends of the elastic sleeve 1 are each provided with an inflation groove 6; the air inlet of the N inflation grooves 6 is arranged on the inner wall of the elastic sleeve 1 at a position not in contact with the outer wall of the joint body 2; the inflation groove 6 is a ring groove arranged around the entire circumference of the outlet end of the elastic sleeve 1; and the air inlet is arranged along the circumference of the inner wall of the outlet end of the elastic sleeve 1. The two groove walls of the inflation groove 6 close to and away from the joint body 2 are parallel to each other in the free state without deformation. The outer wall of the end of the joint body 2 away from the elastic sleeve is provided with external threads; one end of each ring sleeve 4 is provided with an inward flange; the inner wall of the flange is provided with internal threads matched with the external threads of the joint body 2. The other end of each ring sleeve 4 is provided with a hoop groove on the inside, and a ring-shaped clamp 3 is arranged in the hoop groove.

[0047] The flexible joint of this structure is not limited to a spherical elastic body, but can also achieve the purpose of flexible structure through various elastic structures, such as corrugated shape. The outer wall of the end of the joint body 2 close to the elastic sleeve is a first protruding structure expanded outward, which is used for cooperation with the outlet end of the elastic sleeve 1. The flexible joint of this structure is not limited to a straight-through joint, but can also be an elbow joint of various angles; and is not limited to a two-way joint, but can also be a three-way or multi-way joint.

[0048] The flexible joint for a railway vehicle is compressed tightly by the joint body 2 and the ring sleeve 4 to achieve sealing. The elastic body is a flexible material, which can not only play a sealing role, but also can be displaced in various directions.

[0049] The elastic sleeve 1 is sleeved into the joint body 2, the joint body 2 is threadedly connected with the ring sleeve 4, the clamp 3 is compressed tightly with the elastic sleeve 1 to achieve the sealing effect, and the joint body 2 is welded with the brake pipe 5.

[0050] The flexible joint of the structure is not limited to the sealing of the clamp 3 and the inflation groove 6, but can be replaced by various sealing forms.

[0051] Assembly process:

[0052] The ring sleeve 4 and the clamp 3 are pre-assembled on the brake pipe 5, then the brake pipe 5 is welded with the joint body 2, then the elastic sleeve 1 outlet end is sleeved into the joint body 2, finally the ring sleeve 4 is screwed to press the clamp 3 to realize sealing.

[0053] Because the inflation groove 6 is arranged at the necking portion of the elastic body, when the brake pipe 5 is inflated, the compressed air enters the inflation groove 6, and the sealing effect is improved.

[0054] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto. For ordinary skilled persons in the art, the specific technical solutions described in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents. These modifications or replacements do not change the essence of the corresponding technical solutions from the scope of the technical solutions protected by the present application.

Claims

1. A flexible joint for railway vehicles, characterized in that: It comprises an elastic sleeve (1) provided with N outlet ends, N joint bodies (2) and N ring sleeves (4); the N is greater than or equal to 2; One end of the N connector bodies (2) is respectively connected to the N outlet ends of the elastic sleeve (1), and the other end is respectively connected to one end of the N brake pipes (5) of the railway vehicle; and the end portions of the N connector bodies (2) are sleeved and connected to the inner sides of the N outlet ends of the elastic sleeve (1); Each of the N ring sleeves (4) is simultaneously sleeved on the outside of a joint body (2) and the outside of the outlet end of the elastic sleeve (1) connected to the joint body (2), and the two are pressed tightly; The N outlet ends of the elastic sleeve (1) are each provided with an air filling groove (6); The air inlets of the N inflation grooves (6) are all arranged at positions on the inner wall of the elastic sleeve (1) that are not in contact with the outer wall of the joint body (2).

2. The flexible joint for railway vehicles according to claim 1, characterized in that: The inflation groove (6) is an annular groove arranged around the entire circumference of the outlet end of the elastic sleeve (1); The air inlet is arranged along the circumference of the inner wall of the outlet end of the elastic sleeve (1).

3. The flexible joint for railway vehicles according to claim 2, characterized in that: The two groove walls of the inflation groove (6) in the circumferential direction, which are close to the joint body (2) and away from the joint body (2), are parallel to each other in a free state without deformation.

4. The flexible joint for railway vehicles according to any one of claims 1 to 3, characterized in that: An external thread is provided on the outer wall of the connector body (2) at one end away from the elastic sleeve (1); One end portion of each ring sleeve (4) is provided with an inward flange; An internal thread matching the external thread of the joint body (2) is provided on the inner wall of the flange.

5. The flexible joint for railway vehicles according to claim 4, characterized in that: A hoop groove is provided on the inner side of the other end of each ring sleeve (4), and an annular clamp (3) is provided in the hoop groove.

6. The flexible joint for railway vehicles according to claim 5, characterized in that: The middle section of the elastic sleeve (1) is spherical or bellows-shaped.

7. The flexible joint for railway vehicles according to claim 6, characterized in that: The outer wall of the connector body (2) close to one end of the elastic sleeve (1) is an outwardly expanded first protruding structure, which is used to cooperate with the outlet end of the elastic sleeve (1).

8. The flexible joint for railway vehicles according to claim 7, characterized in that: The elastic sleeve (1) is in a straight-through shape or an elbow shape with different angles; The N is equal to 2 or 3 or 4.

9. The flexible joint for railway vehicles according to claim 8, characterized in that: The joint body (2) is used for welding connection with the brake pipe (5).

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