PU air duct for pantograph of locomotive

Abstract

The utility model relates to a locomotive pantograph PU air duct which comprises a connector base, a guide cylinder is integrally formed at the bottom of the connector base, an air duct through-arm rubber protective sleeve is inserted into the connector base and the guide cylinder, an anti-friction pipe is arranged in the air duct through-arm rubber protective sleeve, a flange plate is integrally formed on the air duct through-arm rubber protective sleeve, and the anti-friction pipe is connected with the flange plate. The bottom of the flange plate is attached to the connector base, the two sides of the bottom of the connector base are each provided with two sets of fixing bolts in an inserted mode, the air pipe penetrating arm rubber protection sleeve is arranged, under the condition that the overall trend of an originally-designed PU air pipe of a pantograph is not changed, the PU air pipe which is originally divided into three sections is changed into the overall PU air pipe, and therefore the overall PU air pipe is formed. Meanwhile, the pantograph lower arm PU air pipe penetrating arm rubber protecting sleeve optimizes and replaces an original pantograph lower arm inlet pipeline connector and an original pantograph lower arm outlet pipeline connector, due to the integrated design, pantograph PU air pipe connecting points are effectively reduced, the hidden danger of air leakage of the connectors is eliminated, pipeline pressure leakage can be effectively avoided, and overhauling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive pantographs, in particular to a PU air duct of a locomotive pantograph. Background Art

[0002] The locomotive pantograph, also known as the pantograph or collector, is a current collecting device used on electric locomotives or trams to contact overhead wires from above to obtain current. The main function of the pantograph is to provide a stable and reliable current supply for electric locomotives or trams. The pantograph PU air duct is part of the pantograph automatic pantograph lowering system. It connects the pantograph slide plate with the air path of the ADD device through the pantograph upper arm tensioning rope and the lower arm inner cavity, forming the roof part of the pantograph automatic pantograph lowering protection system. When the pantograph slide plate is hit by foreign objects or worn to the limit, causing the internal preset air duct pressure to leak, a pressure difference will appear in the template of the ADD device, realizing rapid exhaust. After being detected by the main breaker controller (automatic pantograph lowering control box) installed in the car, a main breaker signal is issued, and secondary exhaust is performed at the same time to realize automatic pantograph lowering protection.

[0003] Therefore, the airtightness of the pantograph slide pipe and PU air duct in front of the pantograph ADD device is particularly important during normal use. The original vehicle design PU air duct is divided into three sections when passing through the inner cavity of the lower arm of the pantograph: the PU air duct is installed on the lower arm air inlet joint, passes through the lower arm inner cavity and then installed on the air outlet joint, and is fixed on the upper arm tension rope after exiting the lower arm. Therefore, the PU air duct is divided into "three sections" by the lower arm inlet and outlet air duct joints. However, there are many problems in the use of the existing locomotive pantograph PU air duct. One is that the pantograph lower arm is First, the locking nut of the air duct joint inside the arm is easy to loosen, but the air duct and the root of the joint have not yet moved; second, the locking nut is well tightened, but the air duct has been separated from the root of the joint for a distance, which will cause the pipeline pressure to leak. Once the pipeline pressure leak occurs, the locomotive will automatically lower the pantograph; if the pipeline leakage is insufficient and the ADD device is activated, there will be insufficient contact pressure between the pantograph and the contact network, which will lead to a safety hazard of burning the contact network; third, since the pantograph PU air duct is installed in the lower arm cavity of the pantograph, it is not easy to detect and there is a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art: first, the locking nut of the air duct joint in the lower arm of the pantograph is easy to loosen, but the air duct and the root of the joint are not displaced for the time being; second, the locking nut is well tightened, but the air duct has been separated from the root of the joint for a distance, which will cause the pipeline pressure to leak. Once the pipeline pressure leaks, the locomotive will automatically lower the pantograph; if the pipeline leakage is insufficient to cause the ADD device to operate, there is a safety hazard of insufficient contact pressure between the pantograph and the contact network, which will cause the contact network to burn out; third, since the pantograph PU air duct is installed in the pantograph lower arm cavity, it is not easy to detect and there is a safety hazard, and the locomotive pantograph PU air duct is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The locomotive pantograph PU air duct comprises a joint base, the bottom of which is integrally formed with a guide tube, the joint base and the guide tube are inserted with an air duct arm rubber protective sleeve, the air duct arm rubber protective sleeve is provided with an anti-friction tube, the air duct arm rubber protective sleeve is integrally formed with a flange, the bottom of the flange is attached to the joint base, and two sets of fixing bolts are inserted on both sides of the bottom of the joint base.

[0007] Preferably, arc-shaped grooves for use with fixing bolts are provided on both sides of the flange.

[0008] Preferably, the air duct arm rubber protective sleeve has a conical structure at one end located at the bottom of the flange.

[0009] Preferably, the length of the rubber protective sleeve of the air duct arm located at the bottom end of the flange is greater than the length of the rubber protective sleeve of the air duct arm located at the top end of the flange.

[0010] Preferably, circular grooves for use with fixing bolts are provided on both sides of the bottom of the joint base.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The pantograph PU air duct of this locomotive is provided with a rubber protective sleeve for the air duct penetrating the arm. Therefore, the PU air duct originally divided into three sections can be changed into an integral PU air duct without changing the overall direction of the PU air duct originally designed for the pantograph. At the same time, the rubber protective sleeve for the PU air duct penetrating the arm of the pantograph lower arm optimizes and replaces the two pipe joints at the inlet and outlet of the original pantograph lower arm. The integrated design effectively reduces the connection points of the pantograph PU air duct and eliminates the hidden danger of air leakage at the joint, which can effectively avoid pipeline pressure leakage and facilitate maintenance. The flange is made of rubber material, so the rubber protective sleeve for the air duct penetrating the arm can be effectively fixed, which can effectively prevent water from entering the air duct of the pantograph lower arm. The flange is consistent in size with the original pipe joint and matches the size of the mounting hole of the pantograph lower arm. There is no need to improve the pantograph lower arm, which improves applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of the locomotive pantograph PU air duct proposed by the utility model;

[0014] Figure 2 This is a bottom view of the structure of the locomotive pantograph PU air duct proposed by the utility model;

[0015] Figure 3 This is a partial exploded view of the structure of the locomotive pantograph PU air duct proposed by the utility model.

[0016] In the figure: 1. joint base; 2. guide tube; 3. rubber protective sleeve for air duct arm; 4. flange; 5. anti-friction tube; 6. fixing bolt; 7. arc groove. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Example

[0019] Reference Figure 1-Figure 3 The locomotive pantograph PU air duct comprises a joint base 1, a guide tube 2 is integrally formed at the bottom of the joint base 1, an air duct penetrating arm rubber protective sleeve 3 is inserted in the joint base 1 and the guide tube 2, an anti-friction tube 5 is arranged in the air duct penetrating arm rubber protective sleeve 3, a flange 4 is integrally formed on the air duct penetrating arm rubber protective sleeve 3, one end of the air duct penetrating arm rubber protective sleeve 3 located at the bottom of the flange 4 is in a conical structure, and the air duct penetrating arm rubber protective sleeve 3 with a conical structure at one end is adapted to the shape of the guide tube 2 to improve the tightness during insertion;

[0020] Reference Figure 1 and Figure 3The length of the rubber protective sleeve 3 of the air duct penetrating arm at the bottom end of the flange 4 is greater than the length of the rubber protective sleeve 3 of the air duct penetrating arm at the top end of the flange 4. The difference in length values ​​can increase the contact area with the anti-friction tube 5 and improve the fastening effect. The bottom of the flange 4 fits on the joint base 1. The flange 4 is made of rubber material, so the rubber protective sleeve 3 of the air duct penetrating arm can be effectively fixed, which can effectively prevent water from entering the air duct of the lower arm of the pantograph; and the flange 4 is consistent with the size of the original pipeline joint and the size of the mounting hole of the lower arm of the pantograph. There is no need to improve the lower arm of the pantograph, which improves the applicability. Two sets of fixing bolts 6 are inserted on both sides of the bottom of the joint base 1, and both sides of the bottom of the joint base 1 are opened with fixing bolts 6 is used in conjunction with the circular groove for placement. The design of the circular groove for placement can place the bottom end of the fixing bolt 6 to avoid the bottom thereof protruding too much. By arranging the air duct through-arm rubber protective sleeve 3, the PU air duct originally divided into three sections can be changed into an integral PU air duct without changing the overall direction of the original PU air duct design of the pantograph. At the same time, the rubber protective sleeve 3 of the PU air duct through-arm of the pantograph lower arm optimizes and replaces the two inlet and outlet pipe joints of the original pantograph lower arm. The integrated design effectively reduces the pantograph PU air duct connection points, eliminates the hidden danger of air leakage at the joint, and can effectively avoid pipeline pressure leakage. Arc grooves 7 used in conjunction with the fixing bolts 6 are provided on both sides of the flange 4. The design of the arc grooves 7 avoids affecting the docking of the fixing bolts 6.

[0021] In the utility model, without changing the overall direction of the original PU air duct of the pantograph design, the PU air duct originally divided into three sections can be changed into an integral PU air duct by using the air duct through-arm rubber protective sleeve 3. At the same time, the PU air duct through-arm rubber protective sleeve 3 of the pantograph lower arm optimizes and replaces the two pipe joints of the original pantograph lower arm inlet and outlet, so that the joint base 1, the guide tube 2, the air duct through-arm rubber protective sleeve 3 and the anti-friction pipe 5 can quickly form an integral PU air duct structure. The integrated design effectively reduces the pantograph PU air duct joints and avoids the need for multiple The flange 4 is made of rubber material, which can effectively fix the rubber protective sleeve 3 of the air duct through the arm, and effectively prevent water from entering the air duct of the lower arm of the pantograph. At the same time, the flange 4 is consistent with the size of the original pipeline joint and coincides with the size of the mounting hole of the lower arm of the pantograph. There is no need to improve the lower arm of the pantograph, which improves the applicability. At the same time, the rubber protective sleeve 3 of the air duct through the arm is made of rubber material, which effectively prevents the hidden danger of air leakage caused by the contact and friction between the overall PU air duct and the cavity wall when passing through the lower arm of the pantograph.

[0022] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A locomotive pantograph PU air duct, comprising a joint base (1), characterized in that: The bottom of the joint base (1) is integrally formed with a guide tube (2); a duct-through-arm rubber protective sleeve (3) is inserted into the joint base (1) and the guide tube (2); an anti-friction tube (5) is arranged in the duct-through-arm rubber protective sleeve (3); a flange (4) is integrally formed on the duct-through-arm rubber protective sleeve (3); the bottom of the flange (4) is attached to the joint base (1); and two sets of fixing bolts (6) are inserted on both sides of the bottom of the joint base (1).

2. The locomotive pantograph PU air duct according to claim 1, characterized in that: Arc-shaped grooves (7) for use with fixing bolts (6) are provided on both sides of the flange (4).

3. The locomotive pantograph PU air duct according to claim 1, characterized in that: The end of the air duct arm-penetrating rubber protective sleeve (3) located at the bottom of the flange (4) is in a conical structure.

4. The locomotive pantograph PU air duct according to claim 1, characterized in that: The length of the rubber protective sleeve (3) for the air duct through the arm located at the bottom end of the flange (4) is greater than the length of the rubber protective sleeve (3) for the air duct through the arm located at the top end of the flange (4).

5. The locomotive pantograph PU air duct according to claim 1, characterized in that: Both sides of the bottom of the joint base (1) are provided with circular grooves for use with fixing bolts (6).

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