CN108394316B - Suspension type rigid contact net expansion joint - Google Patents

Abstract

The utility model discloses a suspension type expansion joint of a rigid contact net, which is arranged between two buses, wherein the expansion joint comprises a left end half bus and a right end half bus, the left end half bus and the right end half bus are connected through a suspension type guide piece, the suspension type guide piece comprises a telescopic guide rail and a suspension clamping groove, the telescopic guide rail provides a guide rail for the movement of the left end half bus and the right end half bus, and the suspension clamping groove is connected with a suspension device. According to the utility model, the mass of the expansion joint of the overhead contact system is transferred to the tunnel by the suspension device, so that the uniformity of the overall rigidity distribution of the rigid overhead contact system is improved, the smooth transition and continuous current taking of the pantograph during passing are realized, and the stability of the dynamic characteristics of the pantograph is ensured.

Description

A Suspended Rigid Catenary Expansion Joint

technical field

The invention belongs to the field of catenary technology, in particular to a suspended rigid catenary expansion joint.

Background technique

Rigid catenary is widely used in subway tunnels and electrification due to its characteristics of no tension in the contact line, no anchoring device, no disconnection accidents, few parts, large carrying capacity, safety and reliability, and small maintenance workload. In railway tunnels, the rigid catenary is composed of busbars made of aluminum alloy and contact wires made of copper alloy. Both materials will expand with heat and contract with temperature. Among them, the thermal expansion of aluminum alloy The coefficient is higher than the thermal expansion coefficient of copper alloy.

In the layout of the catenary, in order to meet the requirements of power supply and mechanical aspects, the catenary is divided into several sections with a certain length and independent of each other, called "anchor sections". The setting of the anchor section is conducive to improving the flexibility of catenary power supply, reducing the scope of accidents, and installing compensation devices. Due to the change of ambient temperature and the material characteristics of the busbar, it is necessary to reserve the space required for the expansion and contraction of the rigid catenary of each anchor section when thermal expansion and contraction occur. As the transmission line and mechanical slideway of the electric locomotive pantograph, the catenary needs to maintain mechanical and electrical continuity. Therefore, anchor joints or expansion joints (or joints) are set between two adjacent anchor sections of the rigid catenary. ). Although setting the anchor joint can satisfy the function of the catenary as a pantograph mechanical slideway and transmission line, there is a sudden change in elasticity at the anchor joint of the rigid catenary, which is prone to impact and severe wear, which has an adverse effect on the dynamic performance of the pantograph-catenary. By setting expansion joints or joints, not only can the thermal expansion and contraction of the rigid catenary bus bar of adjacent anchor sections be compensated, and the adjacent anchor sections can be connected, but also the smooth transition and continuous flow of the pantograph can be realized.

At present, through-type expansion joints are generally used. When installing the expansion joint, the fixed joint and the dynamic joint in the joint need to be fixedly connected to the busbar respectively. Through the expansion joint, the busbars of the adjacent anchor sections along the longitudinal direction of the line can be connected through the busbar. , the fixed joint in the expansion joint moves synchronously with the expansion joint body, and the movable joint moves relative to the expansion joint body. The cold shrinkage compensation gap is the sum of the thermal expansion and cold contraction compensation of the adjacent anchor sections, and the compensation efficiency is low. The through-type expansion joint requires the rigid catenary of the two adjacent anchor sections to be arranged in line, and the installation and adjustment are cumbersome. The expansion joint is fixed on the confluence On the row, its mass is transferred to the busbar, so that the busbar at the fixed expansion joint becomes a concentrated mass of the rigid catenary.

Chinese Utility Model Patent No. CN 203032413 U discloses a busbar expansion joint, which realizes thermal expansion and cold contraction of the rigid catenary through the connection between the busbar connection section and the expansion joint body and the relative sliding of the left and right expansion joint bodies. Compensation of the phenomenon, the expansion joint bodies at the left and right ends are connected together by setting the intermediate connecting plate and the guide sleeve, and the electrical connection of the bus bars at the left and right ends is realized through the electrical connection support plate set on the intermediate connecting plate. Many, complex structure, cumbersome installation and adjustment, high mass, relying on the busbars at the left and right ends to bear the load, forming a mass concentration point, reducing the uniformity of the overall rigidity distribution of the rigid catenary, and adversely affecting the dynamic performance of the pantograph-catenary system .

Contents of the invention

In order to solve the above-mentioned problems, the present invention proposes a suspension-type rigid catenary expansion joint, which can improve the rigid catenary expansion joint of the overall rigidity distribution of the rigid catenary; the quality of the catenary expansion joint is transmitted to the tunnel by the suspension device, It improves the uniformity of the overall rigidity distribution of the rigid catenary, realizes smooth transition and continuous flow when the pantograph passes, and ensures the stability of the pantograph-catenary dynamic characteristics.

In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a suspended rigid catenary expansion joint installed between two busbars arranged in parallel along the longitudinal direction of the line and at fixed intervals; the rigid catenary expansion joint It includes the left half-integrated bus bar, the right half-integrated bus bar and the hanging guide. The left half-integrated bus bar is connected to the right half-integrated bus bar through the hanging guide in the middle. The rows are connected into one body, the right half-integrated bus bar is integrated with the right end bus bar, the contact wire is fixedly clamped at the lower end of the left half-integrated bus bar, and the contact wire is fixedly clamped at the lower end of the right half-integrated bus bar. line; the suspension guide includes a telescopic guide rail and a suspension card slot, the left half-integrated bus bar extends into the guide rail I of the telescopic guide rail, and the right half-integrated bus bar extends into the telescopic guide In the guide rail II of the rail, the suspension card slot is connected to the suspension device of the rigid catenary; the rigid catenary expansion joint is installed between two sections of bus bars arranged in parallel along the longitudinal direction of the line and at fixed intervals.

Further, the telescopic guide rail further includes a height adjustment member, and the height adjustment member is installed in the bottom groove of the telescopic guide rail.

Further, bolts are installed at the bottom of the hanging guide, and the bolts are in contact with the bottom surface of the height adjusting member.

Adjust the position of the height adjusting member through the bolt installed at the bottom of the suspension guide to adjust the height of the left half-integrated bus bar and the right half-integrated bus bar, so that the left end half-integrated bus bar and the right end half-integrated bus bar The contact wires clamped at the bottom of the busbar are on the same contact surface, so that the pantograph transitions smoothly from the contact wire clamped at the bottom of the left half-integrated busbar to the contact wire clamped at the bottom of the right half-integrated busbar, thus ensuring power reception The smooth transition of the bow from one anchor segment to another.

Further, the telescopic guide rail also includes an elastic buffer, and the elastic buffer is installed on the top of the telescopic guide rail through fasteners, and the elastic buffer pad can improve the overall elasticity of the suspended rigid catenary expansion joint. , to improve its service life and safety factor.

Further, an electrical connection mounting base is provided on the left half-integrated bus bar, the right half-integrated bus bar, and the hanging guide, and a copper braid is installed on the electrical connection mounting base; to realize the left half-integrated The electrical connection between the bus bar and the half-integrated bus bar at the right end can maintain the electrical continuity of the bus bar and realize the continuous current taking when the pantograph passes.

Further, a hook-shaped contact wire splint I is fixedly installed on the left half-integrated bus bar through a fastener, and the hook-shaped contact wire splint I and the left half-integrated bus bar clamp the contact wire; The right half-integrated bus bar is fixed with a hook-shaped contact line splint II through fasteners, and the hook-shaped contact line splint II and the right-end half-integrated bus bar clamp the contact line; so that the contact line has a fixed length of spatial overlap along the line longitudinal direction , to ensure the continuity of the mechanical slideway and the transmission line when the pantograph slides through, to ensure the stability of the pantograph when it slides through, and to meet the requirements of continuous current taking during the operation of the pantograph.

Further, a fixed-length reinforcement I is provided at the connection between the left half-integrated bus bar and the left end bus bar, and the reinforcement I is connected to the left half-integrated bus bar through fasteners; at the right end The connection between the half-integrated busbar and the right-end busbar is provided with a fixed-length reinforcement II, and the reinforcement II is connected to the right-end half-integrated busbar through fasteners. The setting of the reinforcement can improve the rigidity of the half-integrated busbar , so that the stiffness of the semi-integrated busbar is consistent with the stiffness of the busbar to ensure the uniformity of the overall rigidity distribution of the rigid catenary.

The beneficial effect of adopting this technical solution:

The invention proposes that the suspended rigid catenary expansion joint is connected to the suspension device of the rigid catenary through the suspension slot at the top of the suspension guide to realize suspension and fixation, and transfer the mass of the expansion joint to the tunnel, avoiding the formation of mass concentration, and improving the rigidity The uniformity of the overall rigidity distribution of the catenary, the telescopic guide rail of the suspension guide provides guidance and ample moving space for the free telescopic movement of the busbars at the left and right ends, and the expansion and contraction between the rigid catenary of two adjacent anchor sections Carry out along two different guide rails respectively, without affecting each other;

The invention can improve the compensation efficiency of the rigid catenary expansion joint. The clearance required for the through-type expansion joint is the sum of the compensation clearances required by the busbars at both ends. The space is overlapped so that the compensation gap required to be reserved only needs to be the maximum value of the compensation gap required by the busbars at both ends; the elastic buffer fixed on the top of the telescopic guide rail can improve the overall performance of the rigid catenary expansion joint. Elasticity, to avoid impact when the pantograph passes through; the height adjustment member set in the bottom groove of the telescopic guide rail and the bolt installed at the bottom of the suspension guide are used to adjust the contact wires clamped by the half-integrated bus bars at the left and right ends, so that They are on the same contact surface; the left half-integrated bus bar is integrated with the left end bus bar, the right half-integrated bus bar is integrated with the right end bus bar, and the left and right half-integrated bus bars are in mechanical contact with the left and right ends of the bus bar. With electrical continuity, there is a fixed-length spatial overlap of the half-integrated busbars at the left and right ends along the longitudinal direction of the line to achieve a smooth transition when the pantograph passes;

The present invention installs the copper braid on the electrical connection installation base by setting the electrical connection installation base installed on the left half-integrated bus bar, the right end half-integrated bus bar and the hanging guide, and keeps the half-integrated bus bar at the left and right ends. Electrical continuity, realizing continuous current taking when the pantograph passes, the overall structure of the suspension rigid catenary expansion joint is simple, rich in functions, and easy to install and adjust.

Description of drawings

Fig. 1 is the structural representation of a kind of suspension type rigid catenary expansion joint of the present invention;

Fig. 2 is a side view of a kind of suspended rigid catenary expansion joint in the embodiment of the present invention;

Fig. 3 is a schematic diagram of the structure of the left-end semi-integrated busbar in the embodiment of the present invention;

Fig. 4 is a schematic structural view of the right-end semi-integrated bus bar in the embodiment of the present invention;

Fig. 5 is a schematic structural view of a suspension guide in an embodiment of the present invention;

Fig. 6 is a schematic structural view of an elastic buffer in an embodiment of the present invention;

Fig. 7 is a structural schematic diagram of the height adjusting member in the embodiment of the present invention;

Among them, 1 is the left-end half-integrated bus bar, 2 is the right-end half-integrated bus bar, 3 is the contact line, 41 is the guide rail I, 42 is the guide rail II, 5 is the suspension card slot, 6 is the height adjustment part, and 7 is the elastic Buffer, 81 is the hook-shaped contact line splint I, 82 is the hook-shaped contact line splint II, 9 is the suspension guide, 101 is the reinforcement I, 102 is the reinforcement II, 11 is the bus bar at the left end, and 12 is the bus bar at the right end , 13 is an electrical connection mounting base, 14 is a copper braid, 15 is a bolt, and 16 is a bottom groove.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

In this embodiment, as shown in Fig. 1-Fig. 7, the present invention proposes a suspension-type rigid catenary expansion joint. Between busbars arranged; the rigid catenary expansion joint includes a left-end half-integrated busbar 1, a right-end half-integrated busbar 2 and a suspension guide 9, and the left-end half-integrated busbar 1 and right-end half-integrated busbar 2 Connected by the suspended guide 9 in the middle, the left half-integrated bus bar 1 is integrated with the left end bus bar 11, the right half-integrated bus bar 2 is integrated with the right end bus bar 12, and the left half-integrated bus bar 12 is integrated. The lower end of the bus bar 1 is fixedly clamped to hold the contact wire 3, and the lower end of the right half bus bar 2 is fixedly clamped to hold the contact wire 3; the suspension guide 9 includes a telescopic guide rail and a suspension slot 5, and the left end The half-integrated busbar 1 extends into the guide rail I41 of the telescopic guide rail, the right-hand half-integrated busbar 2 extends into the guide rail II42 of the telescopic guide rail, and the suspension card slot 5 and the rigid contact net Suspension connection

In specific implementation:

As shown in Figures 1-7, the suspension type rigid catenary expansion joint connects the bus bars 11 and 12, the bus bar 11, the left half-integrated bus bar 1, the right half-integrated bus bar 2 and the bus bar 12 are composed of a 12m long The bus bar is obtained by cutting in a "Z" shape. The left half-integrated bus bar 1 is integrated with the bus bar 11, the right half-integrated bus bar 2 is integrated with the bus bar 12, and the left half-integrated bus bar 1 is connected with the right half-integrated bus bar. The length of busbar 2 is 2.5m, and the compensation length for the thermal expansion and contraction of busbars at the left and right ends due to temperature changes is both 500mm. The bottom of the half-integrated bus bar 1 is equipped with a hook-shaped contact wire splint I81 through fasteners, and the left half-integrated bus bar 1 and the hook-shaped contact wire splint I81 jointly complete the clamping of the contact wire 3, and the left end half-integrated bus bar 1 and the bus Row 11 maintains continuity mechanically and electrically, and the bottom of the half-integrated bus bar 2 at the right end is fixed with a hook-shaped contact line splint II 82 through fasteners, and the half-integrated bus bar 2 at the right end and the hook-shaped contact line splint II 82 complete the pairing contact together For the clamping of line 3, the right half-integrated bus bar 2 and bus bar 12 maintain mechanical and electrical continuity, and the "hook"-shaped contact line splint can be made of copper alloy; the left half-integrated bus bar 1 and the right The busbar 2 is connected by a 2m-long suspension guide 9, and the installation calculation is carried out according to the space overlap of the left half-integrated busbar 1 and the right-end half-integrated busbar 2 along the line longitudinally with a length of 2m at the lowest ambient temperature. The guide piece 9 can be made of aluminum alloy. The suspension guide piece 9 includes a telescopic guide rail. In another guide rail II42, the left half-integrated bus bar 1 and the right half-integrated bus bar 2 are arranged in parallel, keeping a fixed distance of 40mm. The telescopic movement of the semi-integrated busbar 2 does not interfere with each other; the suspension guide also includes a suspension card slot 5, which is connected to the rigid catenary suspension device, and transfers the mass of the rigid catenary expansion joint to the tunnel.

At the same time, in order to ensure the uniform distribution of the overall stiffness of the suspended rigid catenary expansion joint, a rigidity reinforcement I101 with a length of 600 mm is provided at the junction of the left-end half-integrated busbar 1 and the left-end busbar 11 through fasteners. A rigidity reinforcement II 102 with a length of 600mm is provided at the joint between the integral busbar 2 and the right busbar 12 through fasteners, and the rigidity reinforcement can be made of aluminum alloy.

In addition, in order to ensure the electrical continuity between the left-end half-integrated bus bar 1 and the right-end half-integrated bus bar 2, and realize the continuous current taking when the pantograph passes through, the hanging guide 9 and the left-end half-integrated bus bar 1 and the right end The half-integrated busbar 2 is equipped with an electrical connection mounting support 13, and a copper braid 14 with a length of 400mm is installed on the electrical connection mounting support 13. When the left and right half-integrated busbars move along the telescopic guide rail, copper The braided belt 14 changes its curved shape to adapt to the movement of the semi-integrated bus bar relative to the telescopic guide rail. The electrical connection support 13 installed on the left and right ends of the semi-integrated bus bar has a length of 230 mm and holds the copper braided belt 14 so that it will not fall. To affect the passage of the pantograph, the electrical connection mounting support can be made of copper alloy.

As shown in Figure 2, in order to facilitate the adjustment of the height of the left-end half-integrated bus bar 1 and the right-end half-integrated bus bar 2, the contact wires 3 clamped at the bottom of the left and right half-integrated bus bars are on the same contact plane. The height adjustment member 6 is installed in the bottom groove 16 of the bottom, and the height adjustment member 6 can be made of rubber, and the position of the height adjustment member 6 is adjusted by adjusting the bolt 15 installed at the bottom end of the suspension guide, thereby adjusting the left half of the busbar 1 The position of the half-integrated bus bar 2 at the right end is high or low, ensuring that the contact wire 3 clamped at the bottom of the half-integrated bus bar at the left and right ends is on the same contact plane, so as to realize a smooth transition when the pantograph passes; The overall elasticity of the net expansion joint itself avoids impact when the pantograph passes through. On the top of the telescopic guide rail, a "eight"-shaped elastic buffer 7 is fixed and installed by fasteners. The "eight"-shaped elastic buffer 7 is set as The up and down movement of the half-integrated busbar provides a margin for space change, and enhances the smoothness of the telescopic movement of the left-end half-integrated busbar 1 and the right-end half-integrated busbar 2 in the telescopic guide rail. The "eight"-shaped elastic buffer 7 can Made of 55Si2Mn spring steel.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (1)

1. a suspension-type rigid catenary expansion joint, characterized in that, the rigid catenary expansion joint is installed between two sections along the longitudinal direction of the line and between busbars arranged in parallel at fixed intervals; the rigid catenary expansion joint The joint includes a left-end half-integrated bus bar (1), a right-end half-integrated bus bar (2) and a hanging guide (9). The left-end half-integrated bus bar (1) and the right-end half-integrated bus bar (2) pass The hanging guide (9) is connected, the left half-integrated bus bar (1) is integrated with the left end bus bar (11), and the right half-integrated bus bar (2) is integrated with the right end bus bar (12) , the contact wire (3) is fixedly clamped at the lower end of the left half-integrated bus bar (1), and the contact wire (3) is fixedly clamped at the lower end of the right half-integrated bus bar (2); the suspension guide The piece (9) includes a telescopic guide rail and a hanging slot (5), the left half-integrated bus bar (1) extends into the guide rail I (41) of the telescopic guide rail, and the right half-integrated bus bar ( 2) Extending into the guide rail II (42) of the telescopic guide rail, the suspension card slot (5) is connected with the suspension device of the rigid catenary; The telescopic guide rail also includes a height adjustment part (6), and the height adjustment part (6) is installed in the bottom groove (16) of the telescopic guide rail; the telescopic guide rail also includes an elastic buffer part (7), so The above-mentioned elastic buffer (7) is installed on the top of the telescopic guide rail through fasteners; Bolts (15) are installed at the bottom of the suspension guide (9), and the bolts (15) are in contact with the bottom surface of the height adjustment piece (6); An electrical connection installation base (13) is provided on the left half-integrated bus bar (1), the right end half-integrated bus bar (2) and the suspension guide (9), and the electrical connection installation base (13) Copper braid (14) is installed on it; A hook-shaped contact line splint I (81) is fixedly installed on the left half-integrated bus bar (1) through fasteners, and the hook-shaped contact line splint I (81) and the left end half-integrated bus bar (1) Clamp the contact line (3); the hook-shaped contact line splint II (82) is fixedly installed on the right half-integrated bus bar (2) through fasteners, and the hook-shaped contact line splint II (82) and the right half The integrated busbar (2) clamps the contact wire (3); A fixed-length reinforcement I (101) is provided at the connection between the left half-integrated bus bar (1) and the left end bus bar (11), and the reinforcement I (101) is connected to the left half-integrated bus bar through fasteners. The bus bar (1) is connected; a fixed-length reinforcement II (102) is provided at the connection between the right half-integrated bus bar (2) and the right end bus bar (12), and the reinforcement II (102) is fastened The piece is connected with the right half-integrated busbar (2).

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