Broken line braking collapse prevention pulley compensation device

Abstract

The utility model relates to a broken line braking collapse prevention pulley compensation device which is provided with a fixing frame, a long connecting plate and a short connecting plate, the left end of the long connecting plate is fixed to the fixing frame, a left pulley is rotationally installed in the middle of the long connecting plate, a transition pulley is rotationally installed at the right end of the long connecting plate, a right pulley is rotationally installed in the middle of the short connecting plate, and a limiting rod is fixedly connected to the right end of the long connecting plate. A first anti-falling connecting rod and a second anti-falling connecting rod are arranged above the long connecting plate, the right end of the first anti-falling connecting rod is hinged to the left end of the short connecting plate, the left end of the second anti-falling connecting rod is hinged to the fixing frame, and the left end of the first anti-falling connecting rod is hinged to the right end of the second anti-falling connecting rod. The limiting blocks on the limiting rods interact with the limiting plates, the braking effect can be achieved, collision between pulleys is prevented, the first anti-falling connecting rod and the second anti-falling connecting rod achieve the anti-falling effect, and overall collapse and overturning of the pulley block are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of catenary of electrified railways, in particular to a broken wire braking and anti-collapse pulley compensation device. Background Art

[0002] The pulley compensation device is installed at a high altitude and is used to connect the catenary wire with a counterweight string. When the temperature changes, the catenary wire expands and contracts due to the influence of temperature change, resulting in elongation or shortening. The pulley compensation device is installed at the wire anchoring points at both ends of the anchor section. Under the action of the gravity of its counterweight string, it can automatically adjust the tension of the wire and keep the wire sag meet the technical requirements, thereby improving the stability and elasticity of the contact suspension and enhancing the operation quality of the catenary.

[0003] If any end wire of the conventional pulley compensation device breaks, due to the action of a large tension, the pulley block will quickly displace, which may lead to accidents such as collision between pulleys, disassembly of the pulley block, and overall collapse, seriously affecting the safe operation of the railway system.

[0004] CN111086417A discloses a pulley compensation device. By moving the movable pulley block to the left along the anti-falling connecting rod, the retaining seat is driven to move to the left together and contact and stop with the middle retaining block on the anti-falling connecting rod, so that the movable pulley block stops moving. Although it has a braking mechanism, it does not have an anti-collapse function, and there is still a risk of overall overturning and collapse when the wire breaks. Summary of the Invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a broken wire braking and anti-collapse pulley compensation device, which can effectively prevent the overall collapse and overturning of the pulley block after the catenary wire end breaks.

[0006] The technical solution adopted by the utility model to solve its technical problem is: a broken wire braking and anti-collapse pulley compensation device, which has a fixed frame, a long connecting plate and a short connecting plate. The left end of the long connecting plate is fixed to the fixed frame. A left pulley is rotatably installed in the middle of the long connecting plate. A transition pulley is rotatably installed at the right end of the long connecting plate. A right pulley is rotatably installed in the middle of the short connecting plate. A limiting rod is fixedly connected to the right end of the long connecting plate. A limiting plate which is fixedly connected to the middle of the short connecting plate and plays a braking role is slidably arranged on the limiting rod. A first anti-falling connecting rod and a second anti-falling connecting rod are arranged above the long connecting plate. The right end of the first anti-falling connecting rod is hinged to the left end of the short connecting plate. The left end of the second anti-falling connecting rod is hinged to the fixed frame. The left end of the first anti-falling connecting rod is hinged to the right end of the second anti-falling connecting rod. The right end of the short connecting plate is connected with a first wire, and the left end of the short connecting plate is connected with a second wire. The second wire sequentially bypasses the transition pulley, the right pulley and the left pulley.

[0007] Furthermore, limiting blocks for controlling the movement of the limiting plate are respectively arranged on the limiting rods on both sides of the limiting plate.

[0008] Preferably, the limiting block is in the structure of a right trapezoid, and the right-angled side of the right trapezoid faces the limiting plate, so that the thickening direction of the limiting block is consistent with the impact force direction generated after wire breaking, improving the strength and impact resistance of the limiting block.

[0009] Specifically, an upper convex block is fixed on the fixing frame, a lower convex block is fixed on the fixing frame below the upper convex block, the left end of the long connecting plate is fixed to the lower convex block, and the left end of the second anti-falling connecting rod is hinged to the upper convex block.

[0010] Further, the hinge center between the second anti-falling connecting rod and the upper convex block protrudes from the fixing center between the long connecting plate and the lower convex block to prevent interference between the second anti-falling connecting rod and the fixing frame when the second anti-falling connecting rod rotates.

[0011] Further, a first wire clamp for clamping the end of the first wire is fixed to the right end of the short connecting plate.

[0012] Further, a second wire clamp for clamping the end of the second wire is fixed at the hinge point between the right end of the first anti-falling connecting rod and the left end of the short connecting plate.

[0013] Furthermore, the left end of the limiting rod and the transition pulley are coaxially installed at the right end of the long connecting plate; the limiting plate and the right pulley are coaxially installed in the middle of the short connecting plate.

[0014] The beneficial effects of the present utility model are as follows: through the interaction between the limiting block on the limiting rod and the limiting plate, the present utility model can play a braking role to prevent collision between pulleys; the first anti-falling connecting rod and the second anti-falling connecting rod play an anti-falling role, effectively preventing the overall collapse and overturning of the pulley block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0017] Figure 2 is a front view structural schematic diagram of the present utility model.

[0018] In the figure: 1. Fixing frame, 2. Long connecting plate, 3. Short connecting plate, 4. Left pulley, 5. Transition pulley, 6. Right pulley, 7. Limiting rod, 7-1. Limiting block, 8. Limiting plate, 9. First anti-falling connecting rod, 10. Second anti-falling connecting rod, 11. Upper convex block, 12. Lower convex block, 13. First wire clamp, 14. First wire, 15. Second wire, 16. Second wire clamp. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only schematically showing the basic structure of the present utility model, so they only show the components related to the present utility model.

[0020] As Figure 1 , Figure 2 shown, a wire-breaking braking and anti-collapse pulley compensation device includes a fixed frame 1, two long connecting plates 2, two short connecting plates 3 and a pulley group. An upper convex block 11 is fixed on the fixed frame 1, and a lower convex block 12 is fixed on the fixed frame 1 below the upper convex block 11. The left ends of the two spaced long connecting plates 2 are fixed to the lower convex block 12. The pulley group includes a right pulley 6, a left pulley 4 and a transition pulley 5. The left pulley 4 is rotatably installed between the middle parts of the two long connecting plates 2, the right pulley 6 is rotatably installed between the middle parts of the two short connecting plates 3, and the transition pulley 5 is rotatably installed between the right ends of the two long connecting plates 2. A first wire clamp 13 is fixed between the right ends of the two short connecting plates 3, and a horizontally extending first wire 14 is clamped on the first wire clamp 13.

[0021] The pulley compensation device also has two limiting rods 7, two limiting plates 8, two first anti-falling connecting rods 9 and two second anti-falling connecting rods 10. The left end of the limiting rod 7 and the transition pulley 5 are coaxially installed at the right end of the long connecting plate 2, and the limiting plate 8 and the right pulley 6 are coaxially installed at the middle part of the short connecting plate 3.

[0022] The limiting rod 7 and the limiting plate 8 are in sliding fit. Limiting blocks 7-1 are respectively provided on the limiting rod 7 on the left and right sides of the limiting plate 8. The limiting block 7-1 is of a right-angled trapezoid structure. Preferably, the right-angled side of the limiting block 7-1 faces the limiting plate 8 to improve the impact strength of the limiting block 7.

[0023] The two first anti-falling connecting rods 9 and the two second anti-falling connecting rods 10 are located above the long connecting plate 2. The right ends of the two first anti-falling connecting rods 9 are hinged to the left ends of the two short connecting plates 3, the left end of the second anti-falling connecting rod 10 is hinged to the upper convex block 11, and the left end of the first anti-falling connecting rod 9 is hinged to the right end of the second anti-falling connecting rod 10.

[0024] A second wire clamp 16 is fixed at the hinge point between the right end of the first anti-falling connecting rod 9 and the left end of the short connecting plate 3. A second wire 15 is clamped on the second wire clamp 16. The second wire 15 sequentially bypasses the transition pulley 5, the right pulley 6 and the left pulley 4 and then vertically downward and is connected in series with a weight string.

[0025] Particularly, the hinge center between the second anti-falling connecting rod 10 and the upper convex block 11 protrudes from the fixed center between the long connecting plate 2 and the lower convex block 12 to prevent interference between the second anti-falling connecting rod 10 and the fixed frame 1 when the second anti-falling connecting rod 10 rotates.

[0026] If the right end of the first wire 14 breaks, the right pulley 6 will move leftward as a whole under the action of the gravity of the weight string at the lower end of the second wire 15 and will tend to collapse. At this time, the limiting plate 8 will contact the limiting block 7-1 on the left side of the limiting rod 7 during the leftward movement following the right pulley 6, preventing the right pulley 6 from continuing to move leftward, which can play a braking role to prevent the pulleys from colliding with each other. The first anti-falling connecting rod 9 and the second anti-falling connecting rod 10 play an anti-falling role to prevent the entire pulley block from collapsing and overturning.

[0027] Similarly, if the second wire 15 breaks, the pulley block will move rightward as a whole under the tension of the first wire 14 at the right end and will tend to fall apart. At this time, the limiting block 7-1 on the right side of the limiting rod 7 and the limiting plate 8 can play a braking role to prevent the pulleys from colliding with each other. The first anti-falling connecting rod 9 and the second anti-falling connecting rod 10 play an anti-falling role to prevent the entire pulley block from collapsing and overturning.

[0028] When the utility model is installed in a tunnel, the height of the steel column of the fixing frame 1 with the upper convex block 11 and the lower convex block 12 will be limited. If a single connecting rod method is used to prevent the entire pulley block from collapsing, it is necessary to ensure that the connecting rod has enough length to ensure the normal horizontal movement of the right pulley 6. Therefore, the convex block 11 needs to be placed at a higher position. This device adopts a four-section connecting rod hinged method with two first anti-falling connecting rods 9 and two second anti-falling connecting rods 10. Using the crank-slider principle, it will not affect the normal horizontal movement of the entire pulley block, and the movement range is wider; the lengths of the first anti-falling connecting rod 9 and the second anti-falling connecting rod 10 are both 600m, and they can rotate between an angle of 70° and 150°. Through calculation, the right pulley 6 can move horizontally within a 485mm space, meeting the on-site use requirements. Compared with a single connecting rod, it can improve the overall strength and reliability of the device.

[0029] In addition, if a traditional telescopic support rod is used to prevent collapse, in a harsh environment, the sleeve will inevitably expand and contract due to heat, and sand and dust will enter, affecting the lubrication effect, etc. There is a high possibility of jamming between the sleeve and the support rod, thus affecting the normal horizontal movement of the right pulley 6; while using the four-section connecting rod method can distribute the overall gravity during wire breakage, avoiding the connecting rod being pulled off due to instantaneous gravity after wire breakage and failing to play the role of preventing collapse.

[0030] The limiting plate 8 adopts a fully enclosed design. While playing a limiting role, it also plays a supporting role for the limiting rod 7, preventing the limiting rod 7 from rotating due to gravity; the limiting rod 7 and the limiting plate 8 can be directly fixed to the long connecting plate 2 and the short connecting plate 3 through nuts, without the need for additional welding or other connection methods, which is convenient for installation.

[0031] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A wire breaking brake anti-collapse pulley compensation device, comprising a fixed frame (1), a long connecting plate (2) and a short connecting plate (3), wherein the left end of the long connecting plate (2) is fixed to the fixed frame (1), a left pulley (4) is rotatably mounted in the middle of the long connecting plate (2), a transition pulley (5) is rotatably mounted on the right end of the long connecting plate (2), a right pulley (6) is rotatably mounted in the middle of the short connecting plate (3), a limit rod (7) is fixedly connected to the right end of the long connecting plate (2), a limit plate (8) is slidably provided on the limit rod (7) and is fixedly connected to the middle of the short connecting plate (3) for braking, and the characteristics are: A first anti-falling connecting rod (9) and a second anti-falling connecting rod (10) are arranged above the long connecting plate (2); the right end of the first anti-falling connecting rod (9) is hinged to the left end of the short connecting plate (3); the left end of the second anti-falling connecting rod (10) is hinged to the fixing frame (1); the left end of the first anti-falling connecting rod (9) is hinged to the right end of the second anti-falling connecting rod (10); the right end of the short connecting plate (3) is connected to the first cable (14); the left end of the short connecting plate (3) is connected to the second cable (15); the second cable (15) passes around the transition pulley (5), the right pulley (6) and the left pulley (4) in sequence.

2. The wire-break brake anti-collapse pulley compensation device according to claim 1, characterized in that: The limiting rods (7) on both sides of the limiting plate (8) are respectively provided with limiting blocks (7-1) for controlling the movement of the limiting plate (8).

3. The wire-break brake anti-collapse pulley compensation device according to claim 2, characterized in that: The limiting block (7-1) is a right-angled trapezoidal structure, with the right-angled side of the right-angled trapezoid facing the limiting plate (8).

4. The wire-break brake anti-collapse pulley compensation device according to claim 3, characterized in that: An upper protrusion (11) is fixed on the fixing frame (1), a lower protrusion (12) is fixed on the fixing frame (1) below the upper protrusion (11), the left end of the long connecting plate (2) is fixed to the lower protrusion (12), and the left end of the second anti-fall connecting rod (10) is hinged to the upper protrusion (11).

5. The wire-break brake anti-collapse pulley compensation device according to claim 4, characterized in that: The hinge center between the second anti-fall connecting rod (10) and the upper protrusion (11) protrudes from the fixing center between the long connecting plate (2) and the lower protrusion (12).

6. The wire-break brake anti-collapse pulley compensation device according to claim 1, characterized in that: A first wire clamp (13) for clamping the end of a first wire (14) is fixed to the right end of the short connecting plate (3).

7. The wire-break brake anti-collapse pulley compensation device according to claim 6, characterized in that: A second wire clamp (16) for clamping the end of the second wire (15) is fixed at the hinge point between the right end of the first anti-fall connecting rod (9) and the left end of the short connecting plate (3).

8. The wire-break brake anti-collapse pulley compensation device according to claim 1, characterized in that: The left end of the limiting rod (7) and the transition pulley (5) are coaxially mounted on the right end of the long connecting plate (2).

9. The wire-break brake anti-collapse pulley compensation device according to claim 1, characterized in that: The limit plate (8) is coaxially installed with the right pulley (6) in the middle of the short connecting plate (3).

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