CN217003555U - Flexible joint for railway vehicle - Google Patents
Flexible joint for railway vehicle Download PDFInfo
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- CN217003555U CN217003555U CN202122671436.1U CN202122671436U CN217003555U CN 217003555 U CN217003555 U CN 217003555U CN 202122671436 U CN202122671436 U CN 202122671436U CN 217003555 U CN217003555 U CN 217003555U
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Abstract
The utility model relates to a joint, in particular to a flexible joint for a railway vehicle. The utility model aims to solve the technical problem that the existing pipe joint is difficult to completely meet the installation and use requirements of railway vehicles, and provides a flexible joint for the railway vehicles. The utility model adopts the combination of the thread sealing and the hoop sealing with the sealing groove for sealing, has good sealing effect, can adapt to high-frequency vibration, solves the problem of welding cracks caused by vehicle vibration in the prior art, can be used for railway passenger car and truck transportation, and is particularly suitable for railway truck transportation. The elastic sleeve is sleeved into the joint body, and the joint body is in matched threaded connection with the sleeve, so that the clamp and the elastic sleeve are pressed tightly, and the joint body and the brake pipe are welded, and the brake pipe is simple in structure, reliable in connection and good in sealing; adopt flexible connection, light in weight, it is flexible, all have a certain amount of displacements in all directions to solved the powerful equipment problem, equipment requirement and the degree of difficulty are lower, and the process is simple, easy dismounting, easily maintenance.
Description
Technical Field
The utility model relates to a joint, in particular to a flexible joint for a railway vehicle.
Background
The brake device is one of five basic parts of a railway vehicle, is an indispensable device for ensuring the accurate stop and the safe operation of the train, and has the function of enabling the brake device to generate corresponding action through the change of compressed air pressure in a main pipe of the train. The transmission of compressed air needs a brake pipeline, and the brake pipeline needs to be formed by connecting a plurality of brake pipes and joints thereof due to different structures of the vehicle and the brake device.
The existing brake pipe joints mainly comprise the following two types:
one is a pipe joint in threaded connection, which is mainly used for railway passenger cars. The problems with this type of joint are:
1. the assembly requirement is high, the difficulty is high, the winding of sealing materials is needed, the working procedures are more, and time and labor are wasted;
2. the thread sealing effect is poor, particularly after high-frequency vibration, the sealing effect of the thread is poor, so that the thread sealing joint cannot be used basically for railway freight cars with strong vibration;
3. the maintenance is not easy, when the pipe system maintenance is carried out, the removal of one joint is likely to need to remove a plurality of connected brake pipes;
the other is a flange-connected pipe joint which is mainly used for railway freight cars. The flange connection is formed by welding a connector with a brake pipe and then connecting the connector with a bolt. Compare in threaded connection, reduced the equipment requirement, sealed effect has also obtained certain assurance, but in use has appeared new problem again:
1. the flange connection belongs to rigid connection, the flange joint has much heavier weight than a threaded joint, and a welding seam at the joint has the risk of cracking due to vibration in the running process of a vehicle;
2. the brake pipeline needs to be fixed on a vehicle through a pipe crane, and when the rigid structure is fixed, a condition of strong assembly is inevitably generated, which aggravates the possibility of weld joint cracking at the joint;
3. the E-shaped sealing ring used for flange connection is easy to break during assembly, the breakage is not easy to find, and the possibility of air leakage exists during vehicle operation, so that the driving safety is influenced.
Disclosure of Invention
The utility model aims to solve the technical problem that the existing pipe joint is difficult to completely meet the installation and use requirements of railway vehicles, and provides a flexible joint for the railway vehicles.
In order to solve the technical problems, the technical solution provided by the utility model is as follows:
a flexible joint for railway vehicles, characterized in that:
the device comprises an elastic sleeve provided with N outlet ends, N connector bodies and N ring sleeves; n is more than or equal to 2;
one end of each of the N joint bodies is connected with one end of each of the N outlet ends of the elastic sleeve, and the other end of each of the N joint bodies is connected with one end of each of N brake pipes of the railway vehicle; the end parts of the N joint bodies are sleeved and connected with the inner sides of the N outlet ends of the elastic sleeve;
and each of the N ring sleeves is sleeved on the outer side of one joint body and the outer side of the outlet end of the elastic sleeve connected with the joint body at the same time and tightly presses the joint body and the elastic sleeve.
Furthermore, N outlet ends of the elastic sleeve are provided with inflation grooves;
the air inlets of the N air inflation grooves are arranged on the inner wall of the elastic sleeve at positions which are not in contact with the outer wall of the connector body.
Furthermore, the inflation groove is an annular groove arranged around the whole circumference of the outlet end of the elastic sleeve;
the air inlet is arranged along the circumference of the inner wall of the outlet end of the elastic sleeve.
Further, the two groove walls of the gas-filled groove which are adjacent to the joint body in the circumferential direction and are far away from the joint body are parallel to each other in an undeformed free state.
Furthermore, an external thread is arranged on the outer wall of one end of the joint body, which is far away from the elastic sleeve;
one end of each ring sleeve is provided with an inward flange;
the inner wall of the flange is provided with an internal thread matched with the external thread of the joint body.
Furthermore, a hoop groove is formed in the inner side of the other end of each ring sleeve, and an annular hoop is arranged in the hoop groove.
Further, the middle section of the elastic sleeve is in a spherical shape or a corrugated pipe shape.
Furthermore, the outer wall of the joint body close to one end of the elastic sleeve is of an outward-expanding first bulge structure and is used for being matched with the outlet end of the elastic sleeve.
Further, the elastic sleeve is straight or elbow-shaped with different angles;
said N is equal to 2 or 3 or 4.
Further, the joint body is used for being connected with the brake pipe in a welding mode.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the flexible joint for the railway vehicle, the elastic sleeve is sleeved into the joint body, and the joint body is in matched threaded connection with the sleeve, so that the hoop and the elastic sleeve are pressed tightly, the joint body and the brake pipe are welded, and the flexible joint for the railway vehicle is simple in structure, reliable in connection and good in sealing.
2. The flexible joint for the railway vehicle is sealed by combining the thread sealing and the hoop sealing with the sealing groove, has good sealing effect, can adapt to high-frequency vibration, solves the problem of welding cracks caused by vehicle vibration in the prior art, and can be used for railway passenger car and truck transportation, particularly railway truck transportation.
3. The flexible joint for the railway vehicle provided by the utility model adopts a flexible connection mode, is light in weight and elastic, and allows a certain amount of displacement in all directions, thereby solving the problem of strong assembly.
4. The flexible joint for the railway vehicle provided by the utility model has the advantages of low assembly requirement and difficulty, simple process and time and labor saving.
5. The flexible joint for the railway vehicle is convenient to disassemble and assemble and easy to overhaul, and the corresponding joint body can be disassembled when the piping system is overhauled.
Drawings
FIG. 1 is a schematic view of the construction of the railway vehicle with the flexible joint and the brake pipe assembled;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of the construction of the joint body of the flexible joint for railway vehicles according to the present invention;
FIG. 4 is a schematic view showing the structure of a loop of a flexible joint for railway vehicles according to the present invention;
description of the reference numerals:
1-elastic sleeve, 2-joint body, 3-hoop, 4-loop sleeve, 5-brake pipe and 6-inflation groove.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
By researching and analyzing the joint structure form of the brake pipeline of the existing railway vehicle and comparing the advantages and the disadvantages of various joint forms, the flexible joint scheme provided by the utility model is used for improving the joint failure problems caused by strong assembly during brake pipeline assembly and vibration during vehicle operation.
The specific structure of the flexible joint for the railway vehicle is shown in figure 1, and the flexible joint comprises an elastic sleeve 1 provided with N outlet ends, N joint bodies 2 and N ring sleeves 4; n is more than or equal to 2; one end of each of the N joint bodies 2 is connected with N outlet ends of the elastic sleeve 1, and the other end of each of the N joint bodies is connected with one end of N brake pipes 5 of the railway vehicle; the end parts of the N joint bodies 2 are sleeved and connected with the inner sides of the N outlet ends of the elastic sleeve 1; each ring sleeve 4 in the N ring sleeves 4 is sleeved on the outer side of one joint body 2 and the outer side of the outlet end of the elastic sleeve 1 connected with the joint body 2 at the same time and tightly presses the joint body 2 and the elastic sleeve; n outlet ends of the elastic sleeve 1 are provided with inflation grooves 6; air inlets of the N air inflation grooves 6 are all arranged at positions on the inner wall of the elastic sleeve 1, which are not in contact with the outer wall of the joint body 2; the inflation groove 6 is an annular groove arranged around the whole 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. The two groove walls of the gas-filled groove 6 which are close to the joint body 2 in the circumferential direction and are far away from the joint body 2 are parallel to each other in an undeformed free state. The outer wall of one end of the joint body 2, which is far away from the elastic sleeve, is provided with an external thread; one end of each ring sleeve 4 is provided with an inward flange; the inner wall of the flange is provided with an internal thread matched with the external thread of the joint body 2. The inner side of the other end part of each ring sleeve 4 is provided with a hoop groove, and an annular hoop 3 is arranged in the hoop groove.
The flexible joint in the structural form is not limited to a spherical elastomer, and the purpose of the flexible structure can be achieved through various elastic structures, such as a corrugated shape. The outer wall of the joint body 2 close to one end of the elastic sleeve is of an outward-expanding first protruding structure and is used for being matched with the outlet end of the elastic sleeve 1. The flexible joint in the structural form is not limited to a straight joint, and can be an elbow at each angle; the device is not limited to two-way, and can also be three-way or multi-way.
The utility model relates to a flexible joint for railway vehicles, which compresses an elastic body through a joint body 2 and a ring sleeve 4 to achieve sealing. The elastic body is made of flexible materials, can play a sealing role and can move in all directions.
The elastic sleeve 1 is sleeved into the joint body 2, the joint body 2 is in matched threaded connection with the ring sleeve 4, the clamp 3 and the elastic sleeve 1 are pressed tightly to achieve a sealing effect, and the joint body 2 is welded with the brake pipe 5.
The flexible joint with the structure form is not limited to be sealed by the clamp 3 and the inflation groove 6, and can be replaced by various sealing forms.
The assembling process comprises the following steps:
the ring sleeve 4 and the hoop 3 are sleeved on the brake pipe 5 in advance, then the brake pipe 5 is welded with the connector body 2, the outlet end of the elastic sleeve 1 is sleeved into the connector body 2, and finally the ring sleeve 4 is screwed into the hoop 3 to realize sealing.
Because the elastic body is provided with the inflation groove 6 at the position of the contraction opening, when the brake pipe 5 is inflated, compressed air enters the inflation groove 6, and the sealing effect is improved.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (10)
1. A flexible joint for railway vehicles, characterized in that:
comprises an elastic sleeve (1) provided with N outlet ends, N joint bodies (2) and N ring sleeves (4); n is more than or equal to 2;
one end of each of the N joint bodies (2) is connected with the N outlet ends of the elastic sleeve (1), and the other end of each of the N joint bodies is connected with one end of each of N brake pipes (5) of the railway vehicle; the end parts of the N joint bodies (2) are sleeved and connected with the inner sides of the N outlet ends of the elastic sleeve (1);
each ring sleeve (4) in the N ring sleeves (4) is sleeved on the outer side of one joint body (2) and the outer side of the outlet end of the elastic sleeve (1) connected with the joint body (2) at the same time, and the two are tightly pressed.
2. The flexible joint for railway vehicle according to claim 1, wherein:
n outlet ends of the elastic sleeve (1) are provided with inflation grooves (6);
air inlets of the N air inflation grooves (6) are arranged on the inner wall of the elastic sleeve (1) at positions which are not in contact with the outer wall of the joint body (2).
3. The flexible joint for railway vehicle according to claim 2, wherein:
the inflation groove (6) is an annular groove which is arranged around the whole 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).
4. A flexible joint for railway vehicles according to claim 3, wherein:
the two groove walls of the inflation groove (6) close to the joint body (2) in the circumferential direction and far away from the joint body (2) are parallel to each other in an undeformed free state.
5. The flexible joint for railway vehicle according to any one of claims 1 to 4, wherein:
the outer wall of one end of the joint body (2) far away from the elastic sleeve (1) is provided with an external thread;
one end of each ring sleeve (4) is provided with an inward flange;
the inner wall of the flange is provided with an internal thread matched with the external thread of the joint body (2).
6. The flexible joint for railway vehicle according to claim 5, wherein:
the inner side of the other end part of each ring sleeve (4) is provided with a hoop groove, and an annular hoop (3) is arranged in the hoop groove.
7. The flexible joint for railway vehicle according to claim 6, wherein:
the middle section of the elastic sleeve (1) is in a spherical or corrugated pipe shape.
8. The flexible joint for railway vehicle according to claim 7, wherein:
the outer wall of the joint body (2) close to one end of the elastic sleeve (1) is of an outward-expanding first protruding structure and is used for being matched with the outlet end of the elastic sleeve (1).
9. A flexible joint for railway vehicles according to claim 8, wherein:
the elastic sleeve (1) is straight or elbow-shaped with different angles;
said N is equal to 2 or 3 or 4.
10. The flexible joint for railway vehicle according to claim 9, wherein:
the joint body (2) is used for being connected with the brake pipe (5) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122671436.1U CN217003555U (en) | 2021-11-03 | 2021-11-03 | Flexible joint for railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122671436.1U CN217003555U (en) | 2021-11-03 | 2021-11-03 | Flexible joint for railway vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217003555U true CN217003555U (en) | 2022-07-19 |
Family
ID=82379683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122671436.1U Active CN217003555U (en) | 2021-11-03 | 2021-11-03 | Flexible joint for railway vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217003555U (en) |
-
2021
- 2021-11-03 CN CN202122671436.1U patent/CN217003555U/en active Active
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