Expansion joint capable of preventing deflection deformation for small-limit power supply rail

Abstract

The utility model discloses a deflection deformation prevention expansion joint for a small-limit power supply rail. The deflection deformation prevention expansion joint comprises a left sliding block, a middle sliding block, a right sliding block, a copper connector, a middle copper soft connector, a connector fixing block, an aluminum base plate, a fishtail guide plate, an L-shaped supporting plate, a supporting plate, a middle connecting block, a limiting sleeve, a partition plate, a fixing plate and the like. The two connector fixing blocks are firstly fixed on the left sliding block and the right sliding block through bolts; welding is carried out along the grooves in the periphery of the bottom of the connector fixing block; the supporting plate is installed on the fishtail guide plate and supports the copper connector and the fixing plate. The L-shaped supporting plate is mounted on the fishtail guide plate through a sunk screw; and the intersection parts of the upper and lower inclined surfaces and the end surfaces at the two ends of the fishtail guide plate are chamfered at acute angles. According to the technical scheme of the utility model, the requirement of insulation spacing under the small-limit condition can be met, and the problem that the existing side contact type expansion joint cannot be installed in a side contact type three-rail system under the small-limit condition is solved.

Description

Technical Field

[0001] The utility model belongs to the field of urban rail traction power supply, and particularly relates to an expansion joint for preventing deflection deformation of a small-clearance power supply rail. Background Technique

[0002] In recent years, with the continuous acceleration of the urban development process, "three-dimensional" and "aerial integration" are considered to be traffic planning concepts that meet the current and future needs. The monorail that runs on elevated viaducts, has low noise, and does not affect road traffic has been welcomed by more and more cities. The straddle-type monorail traffic also has the advantages of less investment, short construction period, strong applicability, low construction cost, and less pollution. The straddle-type monorail generally adopts a traction power supply method that uses a side-contact steel-aluminum composite contact rail to provide electric energy for the monorail locomotive.

[0003] Due to the influence of the vehicle and track beam clearances in some straddle-type monorail projects, the installation clearance of the contact rail is limited within a small clearance. At this time, a special contact rail for small clearances needs to be used, and at the same time, the core component, the contact rail expansion joint, needs to be redesigned. The function of the expansion joint is to enable the two-side contact rails to freely expand and contract along the line direction and keep the current unobstructed, so that the train current collector can pass smoothly.

[0004] However, the existing expansion joints currently have the following defects: (1) The existing expansion joint structure form cannot meet the need for insulation spacing under small-clearance conditions; (2) The components of the laterally installed expansion joint, especially the copper connector, will undergo deflection deformation under its own weight, which will greatly increase the sliding resistance of the expansion element and lead to sliding jamming, thus losing the function of thermal expansion and contraction, and will seriously affect the safe operation of the side-contact rail system; (3) In actual use, the two ends of the fish-tail guide plate of the existing side-contact type expansion joint are right angles. During the expansion and contraction process of the expansion joint, the fish-tail guide plate will generate burrs, scratches and aluminum nodules on the waist inclined surface of the composite rail, increasing the friction coefficient, resulting in too large starting sliding force of the expansion joint, and even sliding jamming, causing the risk that the entire line cannot work properly due to its influence. Content of the Utility Model

[0005] Purpose of the utility model: The purpose of the utility model is to provide an expansion joint for preventing deflection deformation of a small-clearance power supply rail, which can meet the need for insulation spacing under small-clearance conditions and solve the problem that the existing side-contact type expansion joint cannot be installed in the side-contact type three-rail system under small-clearance conditions.

[0006] Technical solution: The expansion joint for preventing deflection deformation of the small limit power supply rail of the present utility model includes a left slider, a right slider, an intermediate slider and a connector fixing block arranged coaxially; openings are provided on the top surfaces of the ends of the left slider and the right slider close to each other, and openings are also provided on the connector fixing block; a connector fixing block is fixedly installed on the top surfaces of the ends of the left slider and the right slider through bolts; welding grooves are machined around the bottom of the connector fixing block, and the left slider, the right slider and the corresponding connector fixing block are welded and fixed along the welding grooves.

[0007] Further, an aluminum backing plate, a copper connector and a fixing plate are sequentially fixedly installed on the outer side of the connector fixing block through bolts, wherein the copper connector is a long waist-shaped integral ring type.

[0008] Further, waist-shaped holes are provided on the left slider and the right slider, a limiting sleeve is arranged in the waist-shaped holes, and fish-tail guide plates are arranged on both sides of the left slider and the right slider; the fish-tail guide plates are fixed at the rail waists of the left slider and the right slider after bolts pass through the limiting sleeves in the waist-shaped holes, and the left slider and the right slider slide along the fish-tail guide plates to ensure that the left and right sliders slide along the direction of the fish-tail guide plates.

[0009] Further, a support plate installation groove is provided on the fish-tail guide plate, and the support plate is fixed at the support plate installation groove through bolts. During the opening and closing process of the expansion joint, the fixing plate and the support plate are in sliding contact, and the support plate can provide balanced support for the copper connector.

[0010] Further, the connector fixing block is arranged at one end of the single straight edge of the copper connector, and the support plate is arranged at the other end of the single straight edge of the copper connector. The support plate provides balanced support for the copper connector to prevent the copper strip from sagging and deforming under its own weight.

[0011] Further, an L-shaped support plate is fixedly connected to the outer side of the fish-tail guide plate through a plurality of bolts to prevent the expansion joint from deflecting and deforming under the influence of its own weight.

[0012] Further, chamfers are provided at both ends of the fish-tail guide plate, and an 8-15° angle is formed between the inclined surface of the chamfer and the length direction of the fish-tail guide plate, reducing the frequency of scratches, burrs and aluminum nodules during the telescopic sliding process of the expansion joint.

[0013] Further, a partition plate is arranged between the fish-tail guide plate and the rail waist of the intermediate slider. A gap of about 0.1 mm is formed between the fish-tail plate and the left and right sliders to reduce the sliding resistance.

[0014] Further, an intermediate connecting block is welded on the top surface of the intermediate slider, and the aluminum backing plate and the intermediate connecting block are connected through the intermediate copper flexible connector.

[0015] Furthermore, scale rulers are provided at both outer ends of the fish-tail guide plate, facilitating on-site installers and inspectors to check whether the reserved compensation amount of the expansion joint at a specific temperature meets the requirements.

[0016] Beneficial effects: Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0017] In this solution, under small-limit conditions, the fixing form of the connector fixing block and the left and right sliders adopts a connection method of bolt fixing plus small-bevel groove welding, ensuring the reliability of the fixed connection and preventing the problem of increased contact resistance caused by non-dense fitting between the fixing block and the left and right sliders due to component deformation during welding.

[0018] In this solution, support plates are installed on both sides of the fish-tail guide plate. Due to the side-contact working form and the copper connector fixing block being located at one end of the copper connector, the other end of the copper connector will sag. Therefore, support plates are installed at the positions of the fish-tail plate corresponding to the sagging of the copper connector to hold up the copper connector to prevent sagging.

[0019] In this solution, an L-shaped support plate is fixed on the fish-tail guide plate at the waist for support and strengthening, avoiding deflection deformation of the expansion joint under the influence of its own weight, enhancing the bending strength of the overall expansion joint, and improving the sliding resistance of the expansion joint during thermal expansion and contraction.

[0020] In this solution, chamfers are made at the intersection of the upper and lower inclined surfaces and the end surfaces at both ends of the fish-tail guide plate, so that when the expansion joint expands and contracts, the rail waist inclined surfaces of the left and right slide rails and the fish-tail guide plate are not prone to scratches and burrs, ensuring a constant friction coefficient and preventing sliding jamming. Description of the Drawings

[0021] Figure 1 is the axonometric schematic diagram of the present utility model;

[0022] Figure 2 is the front view of the present utility model

[0023] Figure 3 is the top view of the present utility model;

[0024] Figure 4 is Figure 2 the cross-sectional view along the A-A direction;

[0025] Figure 5 is Figure 3 the cross-sectional view along the B-B direction;

[0026] Figure 6 is the assembly drawing of the fish-tail guide plate and the L-shaped support plate;

[0027] Figure 7 is the chamfer view at both ends of the fish-tail guide plate;

[0028] Figure 8 is Figure 7 A cross-sectional view along the C-C direction. Specific embodiments

[0029] The technical solutions of the present utility model will be introduced in detail below in conjunction with the specific embodiments and the accompanying drawings of the specification.

[0030] As Figures 1 to 8 shown, the expansion joint for preventing deflection deformation of the small limit power supply rail of the present utility model involves the following components: left slider 1, right slider 2, intermediate slider 3, copper connector 4, intermediate copper flexible connector 5, connector fixing block 6, aluminum backing plate 7, fish-tail guide plate 8, support plate mounting groove 81, scale ruler 82, inclined surface 83, L-shaped support plate 9, support plate 10, intermediate connection block 11, limit sleeve 12, partition plate 13, bolt 14 and fixing plate 15. The specific connection method is as follows:

[0031] As Figures 1 to 3 shown, the left slider 1, right slider 2, and intermediate slider 3 are coaxially arranged, and the intermediate slider 3 is arranged at intervals between the left slider 1 and the right slider 2. In this embodiment, the left slider 1, right slider 2, and intermediate slider 3 are obtained by oblique cutting of the same composite rail. One or more holes are opened on the top surfaces of the mutually approaching ends of the left slider 1 and the right slider 2, and the same number of holes are also opened at the corresponding positions on the two connector fixing blocks 6. In this embodiment, three holes are opened on both the left slider 1 and the right slider 2, and a connector fixing block 6 is fixedly installed on the top surface of the end of each of the left slider 1 and the right slider 2 through three bolts 14. An aluminum backing plate 7, a copper connector 4, and a fixing plate 15 are sequentially fixedly installed on the outside of the connector fixing block 6 through bolts, wherein the copper connector 4 is a long waist-shaped integral ring type. The intermediate connection block 11 is welded to the top surface of the intermediate slider 3, and the aluminum backing plate 7 and the intermediate connection block 11 are connected through the intermediate copper flexible connector 5.

[0032] As Figure 1 and 4 shown, waist-shaped holes are opened on both the left slider 1 and the right slider 2, and limit sleeves 12 are arranged in the waist-shaped holes. Fish-tail guide plates 8 are arranged on both sides of the left slider 1 and the right slider 2. The fish-tail guide plates 8 are fixed to the rail waists of the left slider 1 and the right slider 2 through bolts passing through the limit sleeves 12 in the waist-shaped holes, ensuring that the left slider 1 and the right slider 2 slide along the fish-tail guide plates 8.

[0033] As Figure 4 and 5As shown, welding grooves are machined around the bottom of the connector fixing block 6. Along these welding grooves, the left slider 1, the right slider 2 and the corresponding connector fixing block 6 are welded and fixed. In this embodiment, welding grooves are machined around the bottom of the connector fixing block 6. Drill holes and tap threads at corresponding positions on the left slider 1, the right slider 2 and the connector fixing block 6. Use bolts 14 to fix the two connector fixing blocks 6 to the left slider 1 and the right slider 2 respectively, and then weld along the grooves at the bottom of the connector fixing block 6 to ensure the reliability of the fixed connection. At the same time, it prevents the problem of increased contact resistance caused by the non-dense fit between the fixing block and the left and right sliders due to component deformation during welding.

[0034] In this embodiment, a partition 13 is provided between the fish-tail guide plate 8 and the web of the intermediate slider 3.

[0035] As Figure 1 and Figure 6 shown, a support plate installation groove 81 is provided on the fish-tail guide plate 8. The support plate 10 is fixed at the support plate installation groove 81 by bolts. During the opening and closing processes of the expansion joint, the fixing plate 15 is in sliding contact with the support plate 10. The copper connector 4 is of a long-waisted integral type. The connector fixing block 6 is arranged at one end of the single straight side of the copper connector 4, and the support plate 10 is arranged at the other end of the single straight side of the copper connector 4. The support plate 10 provides a balanced support for the copper connector 4 to prevent the copper strip from sagging and deforming under its own weight.

[0036] In this embodiment, several bolts are used to fixedly connect an L-shaped support plate 9 to the outside of the fish-tail guide plate 8, avoiding deflection deformation of the expansion joint under the influence of its own weight, enhancing the bending strength of the overall expansion joint, and improving the sliding resistance of the expansion joint during thermal expansion and contraction. These bolts are countersunk bolts.

[0037] In this embodiment, scale rulers 82 are provided at both ends on the outside of the fish-tail guide plate 8, facilitating on-site installation and inspection personnel to check whether the reserved compensation amount of the expansion joint at a specific temperature meets the requirements.

[0038] As Figures 6 to 8 shown, chamfers are provided at both ends of the fish-tail guide plate 8, and an angle of 8 - 15° is formed between the inclined surface 83 of the chamfer and the length direction of the fish-tail guide plate 8. In this embodiment, the angle is set to 10°. By providing chamfers at both ends of the fish-tail guide plate 8 and setting the angle between the inclined surface of the chamfer and the length direction of the fish-tail guide plate to 10°, the frequency of scratches, burrs, and aluminum nodules during the telescopic sliding process of the expansion joint is reduced. Furthermore, the free telescopic property of the expansion joint during practical use is ensured, and the safety and reliability of the expansion joint during use are improved.

Claims

1. An expansion joint for preventing deflection deformation of a small-limit power rail, characterized in that: It comprises a left slider (1), a right slider (2), a middle slider (3) and a connector fixing block (6) which are coaxially arranged; holes are opened on the top surfaces of the ends of the left slider (1) and the right slider (2) which are close to each other, and a hole is also opened on the connector fixing block (6); the top surfaces of the ends of the left slider (1) and the right slider (2) are respectively fixed with a connector fixing block (6) by bolts (14); The bottom of the connector fixing block (6) is machined with welding grooves around its periphery, and the left sliding block (1), the right sliding block (2) and the corresponding connector fixing block (6) are fixed by welding along the welding grooves.

2. The anti-deformation expansion joint for a small-limit power rail according to claim 1, characterized in that: The outer side of the connector fixing block (6) is fixedly mounted with an aluminum backing plate (7), a copper connector (4) and a fixing plate (15) in sequence by means of bolts, wherein the copper connector (4) is a long waist full circle type.

3. The anti-deformation expansion joint for a small-limit power rail according to claim 2, characterized in that: The left slider (1) and the right slider (2) are provided with waist-shaped holes, and limiting sleeves (12) are arranged in the waist-shaped holes. Fishtail guide plates (8) are arranged on both sides of the left slider (1) and the right slider (2); The fishtail guide plate (8) is fixed to the rail waist of the left slider (1) and the right slider (2) by passing a bolt through a limiting sleeve (12) in a waist-shaped hole, and the left slider (1) and the right slider (2) slide along the fishtail guide plate (8).

4. The anti-deformation expansion joint for a small-limit power rail according to claim 3, characterized in that: The fishtail guide plate (8) is provided with a support plate installation groove (81), and the support plate (10) is fixed to the support plate installation groove (81) by means of bolts. During the process of opening and closing the expansion joint, the fixing plate (15) is in sliding contact with the support plate (10).

5. The anti-deformation expansion joint for a small-limit power rail according to claim 4, characterized in that: The connector fixing block (6) is arranged at one end of a single straight side of the copper connector (4), and the support plate (10) is arranged at the other end of the single straight side of the copper connector (4), and the support plate (10) provides a balanced support for the copper connector (4).

6. The anti-deformation expansion joint for a small-limit power rail according to claim 3, characterized in that: The outer side of the fishtail guide plate (8) is fixedly connected to an L-shaped support plate (9) via a plurality of bolts.

7. The anti-deformation expansion joint for a small-limit power rail according to claim 3, characterized in that: Chamfers are arranged at both ends of the fishtail guide plate (8), and an angle of 8 to 15° is formed between the chamfered inclined surface (83) and the length direction of the fishtail guide plate (8).

8. The anti-deformation expansion joint for a small-limit power rail according to claim 3, characterized in that: A partition plate (13) is arranged between the fishtail guide plate (8) and the rail waist of the middle slider (3).

9. The anti-deformation expansion joint for a small-limit power rail according to claim 2, characterized in that: An intermediate connecting block (11) is welded to the top surface of the intermediate sliding block (3), and the aluminum pad (7) and the intermediate connecting block (11) are connected via an intermediate copper flexible connector (5).

10. The anti-deformation expansion joint for a small-limit power rail according to claim 3, characterized in that: Scale rulers (82) are arranged at two ends of the outer side of the fishtail guide plate (8).

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