A contact rail height difference adjustable connection joint

Abstract

A contact rail height difference adjustable connection joint, comprising a base plate, wherein the left side of the upper end surface of the base plate is provided with a first holder and a second holder for fixing a low contact rail along the line direction; the right side of the upper end surface of the base plate is provided with a third holder and a fourth holder for fixing a high contact rail along the line direction; an adjusting bolt is threadedly connected at the lower left side of the base plate, a cushion block is provided between the first and second holders, and the adjusting bolt is located below the cushion block, and the cushion block is pushed upward by rotating the adjusting bolt to make the current receiving surface height of the low contact rail and the high contact rail consistent; connecting plates are arranged on the rail waists on both sides of the joint of the low contact rail and the high contact rail, and the two ends of the connecting plates are fixedly connected to the rail waists of the low contact rail and the high contact rail respectively through a first bolt pair. The present invention solves the problem of docking two contact rails with different cross-sections and different heights.

Description

Technical Field

[0001] The invention relates to the technical field of power supply contact rails for urban rail transit, and in particular to a contact rail height difference adjustable connection joint. Background Art

[0002] Contact rail power supply is an important power supply mode for urban rail transit. Before the 1990s, the contact rail was made of low-carbon steel. For example, Beijing Subway Line 1 and Line 13, Tianjin Subway Line 1 and other early subway lines all used low-carbon steel contact rails. Since the 20th century, the contact rail has adopted steel-aluminum composite contact rails with good conductivity, light weight, easy installation, and convenient operation and maintenance. Wuhan Light Rail was the first to use steel-aluminum composite contact rails in China, and then steel-aluminum composite contact rails were widely used in subways in Beijing, Tianjin, Guangzhou, Wuhan, Qingdao and other cities.

[0003] Since low-carbon steel contact rails have high energy consumption, heavy weight and inconvenient maintenance, the existing low-carbon steel contact rail lines need to be upgraded to steel-aluminum composite contact rail lines. Due to the particularity of rail transit, the upgrade and renovation of the lines requires non-stop construction. The cross-section and height dimensions of low-carbon steel contact rails and steel-aluminum composite contact rails are different, and the existing splint-type contact rail connection joints cannot connect contact rails with different cross-sections and heights, which will hinder the upgrade and replacement of the contact rails. Summary of the invention

[0004] The invention provides a contact rail height difference adjustable connecting joint to solve the problem of butt joint of two contact rails with different cross sections and different heights.

[0005] The technical solution adopted by the present invention is: a contact rail height difference adjustable connection joint, comprising a base plate, a first clamping seat and a second clamping seat for fixing a low contact rail are arranged on the left side of the upper end surface of the base plate along the line direction; a third clamping seat and a fourth clamping seat for fixing a high contact rail are arranged on the right side of the upper end surface of the base plate along the line direction; an adjusting bolt is threadedly connected at the lower left side of the base plate, a cushion block is arranged between the first clamping seat and the second clamping seat, and the adjusting bolt is located below the cushion block, and the cushion block is pushed upward by rotating the adjusting bolt to make the current receiving surface heights of the low contact rail and the high contact rail consistent; connecting plates are arranged on the rail waists on both sides of the joint between the low contact rail and the high contact rail, and the two ends of the connecting plate are fixedly connected to the rail waists of the low contact rail and the high contact rail through a first bolt pair respectively.

[0006] The positions where the first, second and third card holders are arranged on the substrate have strip holes perpendicular to the line direction, the first, second and third card holders have through holes on the outside, the first, second, third and fourth card holders have buckling slopes on the inside, the first and second card holders are respectively fixed to the left side of the upper end surface of the substrate by passing through the through holes and the strip holes in sequence through the second bolt pair, and the buckling slopes are respectively buckled on the rail limbs on both sides of the low contact rail; the third card holder is fixed to the right side of the upper end surface of the substrate by passing through the through holes and the strip holes in sequence through the third bolt pair, the fourth card holder is directly welded to the right side of the upper end surface of the substrate, and the buckling slopes are buckled on the rail limbs on both sides of the high contact rail.

[0007] The outer sides of the first clamping seat, the second clamping seat and the third clamping seat are all horizontally provided with tightening bolts, and the tightening bolts are threadedly connected to the base plate.

[0008] A tightening seat is respectively provided on the base plates outside the first clamping seat, the second clamping seat and the third clamping seat, and the tightening bolt is threadedly connected to the tightening seat.

[0009] Two adjusting bolts are arranged along the line direction. The cushion block is a circular cushion block, and a blind hole is arranged at the center of the lower end of the circular cushion block. The upper end of the adjusting bolt is inserted into the blind hole.

[0010] There are four adjusting bolts arranged in two rows along the line direction, there are two pads and both are inverted U-shaped pads, and the upper surfaces of the base plates on both sides of the adjusting bolts are symmetrically provided with limiting grooves perpendicular to the line direction, the two limbs of the inverted U-shaped pads are inserted in the limiting grooves, and the upper end of the adjusting bolt extends into the inverted U-shaped pad.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention combines the buckling connection method with the connecting plate connection method, and can connect two contact rails with different cross-sections. The connection is reliable and easy to use, and it has the function of conducting current, ensuring that the train can receive current reliably.

[0013] 2. The present invention can adjust the height difference between two contact rails of different heights to ensure that the current receiving surfaces of the two contact rails are at the same height, so that the train can draw electricity smoothly.

[0014] 3. The present invention solves the problem of docking two contact rails with different cross-sections and heights during contact rail line reconstruction and track replacement, improves the efficiency of line reconstruction and track replacement construction, and ensures the safe operation of trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural front view of the present invention;

[0016] Figure 2 is a top view of the structure of the first embodiment of the present invention without connecting the contact rail;

[0017] Figure 3 is a top view of the structure of the second embodiment of the present invention without connecting the contact rail;

[0018] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional view of the structure at AA (first embodiment);

[0019] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional view of the structure at AA (second embodiment);

[0020] Figure 6 yes Figure 1 Schematic diagram of the cross-section of the structure at the middle BB;

[0021] Figure 7 yes Figure 5 Schematic diagram of the cross-section of the structure at CC in the middle;

[0022] Figure 8 It is a structural schematic diagram of the connecting plate of the present invention. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-8 The present invention is described in detail with specific embodiments.

[0024] Example 1, see Figure 1 , 2 , 4, 6, 8.

[0025] A contact rail height difference adjustable connection joint, comprising a base plate 1, wherein a first clamping seat 2 and a second clamping seat 3 for fixing a low contact rail 6 are arranged on the left side of the upper end surface of the base plate 1 along the line direction; a third clamping seat 8 and a fourth clamping seat 9 for fixing a high contact rail 7 are arranged on the right side of the upper end surface of the base plate 1 along the line direction; the positions where the first clamping seat 2, the second clamping seat 3 and the third clamping seat 8 are arranged on the base plate 1 have strip holes 11 perpendicular to the line direction, the outer sides of the first clamping seat 2, the second clamping seat 3 and the third clamping seat 8 (away from the contact rail) are all provided with through holes 12, and the first clamping seat 2, the second clamping seat 3, the third clamping seat 8 are provided with a through hole 12, and the first clamping seat 2, the second clamping seat 3, the third clamping seat 8 are provided with a through hole 12. The inner side of the first and second clamping seats 9 (the side close to the contact rail) are provided with a pressing bevel 13. The first clamping seat 2 and the second clamping seat 3 are respectively fixed to the left side of the upper end surface of the substrate 1 through the second bolt pair 14 through the through hole 12 and the strip hole 11 in sequence, and the pressing bevel 13 is respectively pressed on the rail limbs on both sides of the low contact rail 6; the third clamping seat 8 is fixed to the right side of the upper end surface of the substrate 1 through the third bolt pair 15 through the through hole 12 and the strip hole 11 in sequence, and the fourth clamping seat 9 is directly welded to the right side of the upper end surface of the substrate 1, and the pressing bevel 13 is pressed on the rail limbs on both sides of the high contact rail 7.

[0026] During specific assembly, firstly, the fourth card holder 9 is directly welded to the right side of the upper end surface of the substrate 1 according to design requirements as an assembly reference for the first card holder 2, the second card holder 3 and the third card holder 8, and then the first card holder 2, the second card holder 3 and the third card holder 8 are installed in sequence.

[0027] Since the first card holder 2, the second card holder 3 and the third card holder 8 are connected to the base plate 1 through the strip hole 11, the installation positions of the first card holder 2, the second card holder 3 and the third card holder 8 can be conveniently adjusted. However, due to the vibration of the contact rail and other reasons during the operation of the line, the first card holder 2, the second card holder 3 and the third card holder 8 all have the hidden danger of retreating. In order to eliminate this hidden danger, the outer sides of the first card holder 2, the second card holder 3 and the third card holder 8 are horizontally provided with a tightening bolt 18, and the tightening bolt 18 is threadedly connected to the base plate 1. The tightening bolt 18 tightens the first card holder 2, the second card holder 3 and the third card holder 8 to prevent them from retreating.

[0028] Preferably, a tightening seat 19 is respectively provided on the base plate 1 outside the first clamping seat 2 , the second clamping seat 3 and the third clamping seat 8 , and the tightening bolt 18 is threadedly connected to the tightening seat 19 .

[0029] Furthermore, an adjusting bolt 4 is threadedly connected at the lower left side of the base plate 1, a cushion block 5 is provided between the first clamping seat 2 and the second clamping seat 3, and the adjusting bolt 4 is located below the cushion block 5, and the cushion block 5 is pushed upward by rotating the adjusting bolt 4 to make the current receiving surface heights of the low contact rail 6 and the high contact rail 7 consistent;

[0030] In order to ensure the stability of the low contact rail 6 after the height is adjusted, two adjusting bolts 4 are arranged along the line direction, and the pad 5 is a circular pad, and a blind hole is arranged at the center of the lower end of the circular pad, and the upper end of the adjusting bolt 4 is inserted into the blind hole to prevent the circular pad from moving. The adjusting bolts 4 are all equipped with anti-loosening nuts 20, and the anti-loosening nuts 20 are located below the base plate 1. After the adjusting bolts 4 are adjusted, the anti-loosening nuts 20 are tightly pressed against the lower end surface of the base plate 1.

[0031] Furthermore, connecting plates 10 are arranged on the rail waists on both sides of the joint between the lower contact rail 6 and the upper contact rail 7 to control the gap between the two contact rails and conduct current. The two ends of the connecting plate 10 are fixedly connected to the rail waists of the lower contact rail 6 and the upper contact rail 7 through first bolt pairs 17, respectively.

[0032] In order to prevent the connecting plate 10 from interfering with the first bolt pair 17 when connecting two contact rails of different heights, a through hole 21 is provided at one end of the connecting plate 10 connected to the high contact rail 7, and a waist-shaped hole 22 is vertically provided at one end connected to the low contact rail 6. The first bolt pair 17 passes through the through hole 21 and is fixedly connected to the waist of the high contact rail 7, and the first bolt pair 17 passes through the waist-shaped hole 22 and is fixedly connected to the waist of the low contact rail 6; the interference between the low contact rail 6 and the first bolt pair 17 is eliminated by the up and down adjustment function of the waist-shaped hole 22.

[0033] Example 2, see Figure 1 , 3 , 5, 6, 7, 8.

[0034] The basic structure is the same as that of Example 1, except that: there are four adjusting bolts 4 arranged in two rows along the line direction, there are two pads 5 and both are inverted U-shaped pads, and the upper surface of the base plate 1 on both sides of the adjusting bolt 4 is symmetrically provided with limiting grooves 16 perpendicular to the line direction, and the two limbs of the inverted U-shaped pad are inserted into the limiting grooves 16, and the upper end of the adjusting bolt 4 extends into the inverted U-shaped pad. The limiting grooves 16 are used to ensure that after the adjustment of the adjusting bolt 4 is completed, the two limbs of the inverted U-shaped pad are still located in the limiting grooves 16, so as to prevent the inverted U-shaped pad from moving along the line direction after the height difference of the contact rail is adjusted, and ensure the stability of the low contact rail 6 after the height adjustment.

[0035] In the above embodiment, the base plate 1, the first card seat 2, the second card seat 3, the third card seat 8 and the fourth card seat 9 are all made of aluminum alloy, which is light, has suitable mechanical strength and good electrical conductivity; the connecting plate 8 is a copper plate, which has high mechanical strength and electrical conductivity; the pad 5 is a nylon pad, which effectively prevents the adjusting bolt 4 from scratching the low contact rail 6; the low contact rail 6 is a steel-aluminum composite contact rail, and the high contact rail 7 is a low-carbon steel contact rail.

[0036] The installation method of the present invention is as follows: first, the connecting plate 10 is connected to the reserved holes on the rail waist on both sides of the joint of the two contact rails (the low contact rail 6 and the high contact rail 7) through the first bolt pair 17, and then the fourth clamping seat 9 on the base plate 1 is clamped into one side rail limb of the high contact rail 7, and then the first clamping seat 2, the second clamping seat 3, and the third clamping seat 8 are assembled on the base plate 1 and buckled onto the corresponding rail limbs, and the adjustment bolt 4 is rotated to make the current receiving surfaces of the two contact rails flush, and the positions of the first clamping seat 2, the second clamping seat 3, and the third clamping seat 8 are adjusted, and the second bolt pair 14, the third bolt pair 15 and the tightening bolt 18 are tightened in sequence.

[0037] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A contact rail height difference adjustable connection joint, characterized in that: The invention comprises a base plate (1), wherein a first clamping seat (2) and a second clamping seat (3) for fixing a low contact rail (6) are arranged on the left side of the upper end surface of the base plate (1) along the line direction; a third clamping seat (8) and a fourth clamping seat (9) for fixing a high contact rail (7) are arranged on the right side of the upper end surface of the base plate (1) along the line direction; an adjusting bolt (4) is threadedly connected at the lower left side of the base plate (1); a cushion block (5) is arranged between the first clamping seat (2) and the second clamping seat (3), and the adjusting bolt (4) is located below the cushion block (5); the adjusting bolt (4) is rotated to push the cushion block (5) upward so that the low contact rail (6) and the high contact rail (7) are aligned with each other. The current receiving surfaces of the lower contact rail (6) and the upper contact rail (7) are of the same height; connecting plates (10) are arranged on the rail waists on both sides of the joint between the lower contact rail (6) and the upper contact rail (7); the two ends of the connecting plate (10) are respectively fixedly connected to the rail waists of the lower contact rail (6) and the upper contact rail (7) by means of first bolt pairs (17); the first clamping seat (2), the second clamping seat (3), the third clamping seat (8) and the fourth clamping seat (9) all have buckling surfaces on their inner sides; the buckling surfaces of the first clamping seat (2) and the second clamping seat (3) are respectively buckled on the rail limbs on both sides of the lower contact rail (6), and the buckling surfaces of the third clamping seat (8) and the fourth clamping seat (9) are respectively buckled on the rail limbs on both sides of the upper contact rail (7).

2. The contact rail height difference adjustable connection joint according to claim 1, characterized in that: The positions where the first card seat (2), the second card seat (3) and the third card seat (8) are arranged on the base plate (1) have strip holes (11) perpendicular to the line direction; the first card seat (2), the second card seat (3) and the third card seat (8) have through holes (12) on the outside; the buckling surfaces on the insides of the first card seat (2), the second card seat (3), the third card seat (8) and the fourth card seat (9) are all buckling inclined surfaces (13); the first card seat (2) and the second card seat (3) are respectively penetrated in sequence by second bolt pairs (14) The through hole (12) and the strip hole (11) are fixed on the left side of the upper end surface of the base plate (1), and the buckling inclined surface (13) is buckled on the rail limbs on both sides of the low contact rail (6) respectively; the third clamping seat (8) is fixed on the right side of the upper end surface of the base plate (1) by passing through the through hole (12) and the strip hole (11) in sequence through a third bolt pair (15); the fourth clamping seat (9) is directly welded to the right side of the upper end surface of the base plate (1), and the buckling inclined surface (13) is buckled on the rail limbs on both sides of the high contact rail (7).

3. The contact rail height difference adjustable connection joint according to claim 2, characterized in that: The outer sides of the first clamping seat (2), the second clamping seat (3) and the third clamping seat (8) are all horizontally provided with tightening bolts (18), and the tightening bolts (18) are threadedly connected to the base plate (1).

4. The contact rail height difference adjustable connection joint according to claim 3, characterized in that: A tightening seat (19) is respectively provided on the base plate (1) outside the first clamping seat (2), the second clamping seat (3) and the third clamping seat (8), and the tightening bolt (18) is threadedly connected to the tightening seat (19).

5. A contact rail height difference adjustable connection joint according to claim 1, 2, 3 or 4, characterized in that: Two adjusting bolts (4) are arranged along the line direction. The cushion block (5) is a circular cushion block, and a blind hole is arranged at the center of the lower end of the circular cushion block. The upper end of the adjusting bolt (4) is inserted into the blind hole.

6. A contact rail height difference adjustable connection joint according to claim 1 or 2 or 3 or 4, characterized in that: There are four adjusting bolts (4) arranged in two rows along the line direction, there are two cushion blocks (5) and both are inverted U-shaped cushion blocks, the upper surface of the base plate (1) on both sides of the adjusting bolt (4) is symmetrically provided with limiting grooves (16) perpendicular to the line direction, two limbs of the inverted U-shaped cushion block are inserted into the limiting grooves (16), and the upper end of the adjusting bolt (4) extends into the inverted U-shaped cushion block.

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