Movable crane track device based on suspension bridge main cable

Abstract

The utility model relates to the field of mobile cranes, and discloses a mobile crane rail device based on a suspension bridge main cable, which comprises a main cable, a plurality of connecting pieces and a plurality of sections of rails, the plurality of sections of rails are arranged on the main cable in an end-to-end hinged manner, and the rails are connected with the main cable through the connecting pieces. The track is used as an auxiliary structure to be installed on the main cable, and durability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of mobile cranes, in particular to a mobile crane track device based on a main cable of a suspension bridge. Background Art

[0002] In the construction of suspension bridges, it is usually necessary to construct two main cables first, so that the main cables serve as the main upper load-bearing components, and then set up a mobile crane on the two main cables. The two sides of the mobile crane move on the main cables through a traveling mechanism respectively, and the traction device provides the traveling mechanism with moving power, so that the main cables are used as the main load-bearing structure, and the components and materials are transported to the set position by the mobile crane to facilitate construction and transportation.

[0003] However, the prior art usually sets the traveling mechanism directly on the main cable without any auxiliary structure to facilitate the movement of the traveling mechanism. The main cable is arc-shaped and is subjected to wind load shaking. If the auxiliary structure is installed on the main cable and shakes with the main cable, the auxiliary structure is prone to generate large internal stress, thereby reducing its durability. Utility Model Content

[0004] The utility model aims to provide a mobile crane track device based on the main cable of a suspension bridge, wherein the track is installed on the main cable as an auxiliary structure and its durability is guaranteed.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mobile crane track device based on the main cable of a suspension bridge, comprising a main cable, a plurality of connectors and a plurality of track sections, wherein the plurality of track sections are hingedly arranged on the main cable at the ends, and the track and the main cable are connected by connectors.

[0006] The beneficial effects of this program are:

[0007] Tracks are arranged on the main cable to facilitate the movement of the traveling device of the mobile crane on the main cable. The tracks are fixed on the main cable through connectors, making full use of the permanent main cable as a load-bearing structure for laying the tracks. Since the tracks are made of rigid materials with high hardness and small deformation, they can effectively support the traveling mechanism. Compared with not arranging tracks, this solution optimizes the moving surface of the traveling mechanism (the contact surface between the traveling mechanism and the tracks), making the moving surface of the traveling mechanism flatter and more durable. Since each section of the track is a straight line, the moving trajectory of the traveling mechanism is less affected by the deformation of the main cable, and can also increase the moving speed of the traveling mechanism. Since the main cable is usually a parabola, and the track with the same parabola as the main cable is difficult to manufacture, each section of the track needs to be bent. If the same set of bending equipment is used, the curvature of each section of the track is the same, while the curvature of the parabola of the main cable is constantly changing, so the track is still impossible to completely fit the shape of the main cable. In addition, under the action of wind load, the main cable will also undergo lateral deformation, making it even more difficult for the track to fit the shape of the main cable, which in turn causes the internal stress generated by the curvature of the main cable and its deformation under wind load to be transmitted to the track; in this scheme, the idea is changed, and the track is no longer pursued to fit the shape of the track and the main cable to increase the stability of the walking mechanism when moving. Instead, the track is divided into multiple sections. The standard length of the track is determined according to the span of the suspension bridge cable, and the length of the special track is appropriately adjusted according to the main cable and the position of the cable clamp. The sections of the track are hinged, and the specific shape of the main cable is no longer considered. The internal stress transmitted to the track by the main cable is released through the hinged position, thereby ensuring the durability of the track.

[0008] Furthermore, the track is a box-shaped section, and an upper flange and a lower flange are respectively provided on the upper and lower sides of the box-shaped section.

[0009] Furthermore, the connecting part includes a clamp and a track clamp. The clamp is locked on the main cable. The clamp is arranged at the end of each track section. A plurality of track clamps are arranged on the upper side of the clamp. The track clamp includes a fixing part and an elastic part connected to each other. The fixing part is connected to the upper surface of the clamp. The elastic part uses its own elasticity to press on the lower flange of the track.

[0010] Furthermore, the elastic member is a strip-shaped member that has been bent multiple times, and the two ends of the elastic member are respectively a straight rail-pressing section and a fixed section. The portion of the spring member located between the rail-pressing section and the fixed section is a bent section. The fixed section is connected to the fixing member, and the rail-pressing section is pressed on the lower flange of the track.

[0011] Furthermore, the fixing member includes an arc-shaped portion, a horizontal cylindrical groove with a fan-shaped cross-section is provided on the lower side of the arc-shaped portion, the space between the cylindrical groove and the upper side of the clamp forms a slot, the fixed section of the spring member is inserted into the slot, there is friction between the fixed section and the slot, when the external force is greater than the friction force, the fixed section can slide relative to the slot.

[0012] Furthermore, a cable clamp is provided on the main cable, and the upper surface of the clamp is higher than the upper surface of the cable clamp.

[0013] Furthermore, a convex portion is provided at one end of the track, and a concave portion is provided at the other end of the track, the shapes of the convex portion and the concave portion match each other, and pin holes are provided on the convex portion and the concave portion, and connecting pins are provided in the pin holes; at the hinged position of the two tracks, the convex portion of one track is inserted into the concave portion of the other track, and the connecting pin passes through the pin holes of the convex portion and the concave portion at the same time and is rotatably connected to the two pin holes.

[0014] Furthermore, the pin hole is in the shape of an elongated strip.

[0015] This solution also has the following effects:

[0016] 1. Use the clamp as a track laying platform, and the upper surface of the laying platform is higher than the cable clamp to avoid interference between the track and the cable clamp.

[0017] 2. The clamp is fastened to the main cable by high-strength bolts, and the track is fixed to the clamp by the rail clamp. The rail clamp allows the track to move longitudinally relative to the clamp and allows the track to overcome the elastic vertical movement of the elastic part. Since the main cable is a flexible structure and is parabolic, when the track is subjected to force, the elastic rail clamp can be deformed appropriately to avoid damage to the track and the clamp.

[0018] 3. If the design allows, the cable clamps of the permanent structure can be simply modified to serve as the track support and fixing structure.

[0019] 4. The track is a box-type structure welded from steel plates, with concave and convex joint hinges at both ends, which can be connected in series through connecting pins to form a walking track that changes with the deflection of the main cable.

[0020] 5. In order to make the track adapt to the length deformation of the main cable, on the one hand, the connecting pin hole of the track is designed to be a long slot, leaving enough gap to offset the influence of the deformation of the main cable on the track; on the other hand, the track clamp adopts elastic parts of suitable tonnage, which does not completely constrain the track, so that the track can slide along the length direction of the main cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional axonometric diagram of a mobile crane including the present embodiment;

[0022] Figure 2 for Figure 1 A magnified image of point A;

[0023] Figure 3 for Figure 2 A magnified view of point B;

[0024] Figure 4 is a cross-sectional front view of an embodiment;

[0025] Figure 5 It is a left side view of the embodiment;

[0026] Figure 6 A cross-sectional view of a track according to an embodiment. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The figure marks in the drawings of the specification include: truss frame 11, lifting winch 12, lifting cable 13, walking mechanism 2, track 3, upper flange 31, lower flange 32, convex portion 33, concave portion 34, connecting pin 35, hoop 4, cable clamp 5, fixing part 6, arc-shaped portion 61, elastic part 7, rail pressing section 71, bending section 72, fixing section 73, main cable 8.

[0029] Example

[0030] The embodiment is basically as follows Figure 1-4 As shown: a mobile crane track device based on the main cable of a suspension bridge includes a main cable 8, a plurality of connectors and a plurality of track sections 3. The plurality of track sections 3 are hingedly arranged on the main cable 8 at the ends, and the track sections 3 and the main cable 8 are connected by connectors.

[0031] like Figure 6 As shown, the track 3 is a box-shaped section, and an upper flange 31 and a lower flange 32 are respectively provided on the upper and lower sides of the box-shaped section; Figure 4 As shown, a convex portion 33 is provided at one end of the track 3, and a concave portion 34 is provided at the other end of the track 3. The shapes of the convex portion 33 and the concave portion 34 match each other. Long strip-shaped pin holes are opened on the convex portion 33 and the concave portion 34, and connecting pins 35 are provided in the pin holes; at the hinged position of the two tracks 3, the convex portion 33 of one track 3 is inserted into the concave portion 34 of the other track 3, and the connecting pin 35 passes through the pin holes of the convex portion 33 and the concave portion 34 at the same time and is rotatably connected with the two pin holes.

[0032] The connecting piece includes a clamp 4 and a rail clamp, and the clamp 4 is clamped on the main cable 8. Figure 4 As shown, a bolt hole is opened at the lower end of the hoop 4, and the lower end of the hoop 4 is tightened by bolts. In this embodiment, high-strength bolts are used to tighten the hoop 4, so as to fix the hoop 4 on the main cable 8; the hoop 4 is arranged at the end of each track section 3, and a plurality of rail clamps are arranged on the upper side of the hoop 4;

[0033] like Figure 2 , Figure 3 , Figure 4As shown, the rail clamp includes a fixing member 6 and an elastic member 7 connected to each other. The fixing member 6 and the upper surface of the clamp 4 are welded. The fixing member 6 includes an arc portion 61. A horizontal cylindrical groove with a fan-shaped cross section is opened on the lower side of the arc portion 61. The space between the cylindrical groove and the upper side of the clamp 4 forms a slot; the elastic member 7 is a strip member that has been bent multiple times. The two ends of the elastic member 7 are respectively a straight rail clamping section 71 and a fixing section 73. The part of the spring member located between the rail clamping section 71 and the fixing section 73 is a bending section 72. In this embodiment, the bending section 72 is bent four times; the fixing section 73 is inserted into the slot, and there is friction between the fixing section 73 and the slot. When the external force is greater than the friction, the fixing section 73 can slide longitudinally relative to the slot. In this embodiment, the longitudinal direction is the length direction of the track 3; the rail clamping section 71 uses the elasticity of the bending section to press on the lower flange 32 of the track 3, and the bending section 72 uses its own elasticity to partially press on the fixing member 6, providing a reaction force for the rail clamping section 71 to press on the track 3.

[0034] like Figure 5 As shown, a cable clamp 5 is provided on the main cable 8 . The cable clamp 5 is a prior art and is used to connect the sling. The upper surface of the hoop 4 is higher than the upper surface of the cable clamp 5 .

[0035] This embodiment needs to be used in conjunction with a lifting mechanism to transport materials.

[0036] like Figure 1 As shown, the lifting mechanism includes a truss frame 11, a lifting winch 12 is bolted inside the truss frame 11, a lifting cable 13 is connected to the lifting winch 12, and the lower end of the lifting cable 13 can be connected to the material to be transported; a plurality of walking rollers are respectively provided on both sides of the lifting mechanism, and the walking rollers can roll on the track 3. A conventional limiting structure is set on the walking roller to prevent the walking roller from derailing, which will not be repeated here.

[0037] A method of using a mobile crane track 3 device based on a suspension bridge main cable 8 is as follows:

[0038] 1. A clamp 4 is provided on the main cable 8, and the clamp 4 is used as a laying platform for the track 3. The upper surface of the laying platform is higher than the cable clamp 5, so as to avoid interference between the track 3 and the cable clamp 5.

[0039] 2. The track 3 is fixed to the clamp 4 by a rail clamp, which allows the track 3 to move longitudinally relative to the clamp 4 and allows the track 3 to overcome the elastic vertical movement of the elastic member 7; since the main cable 8 is a flexible structure and is parabolic, when the track 3 is subjected to force, the elastic rail clamp can be deformed appropriately to avoid damage to the track 3 and the clamp 4.

[0040] 3. In order to make the track 3 adapt to the length deformation of the main cable 8, on the one hand, the hole of the connecting pin 35 of the track 3 is designed to be a long slot, leaving enough gap to offset the influence of the deformation of the main cable 8 on the track 3; on the other hand, the track clamp of the track 3 adopts an elastic member 7 of appropriate tonnage, which does not completely constrain the track 3, so that the track 3 can slide along the length direction of the main cable 8, forming a walking track 3 that changes with the deflection of the main cable 8.

[0041] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A mobile crane track device based on the main cable of a suspension bridge, characterized in that: It comprises a main cable, a plurality of connectors and a plurality of track sections, wherein the plurality of track sections are hingedly arranged on the main cable at the ends, and the track and the main cable are connected by the connectors.

2. The mobile crane track device based on the main cable of a suspension bridge according to claim 1, characterized in that: The track is a box section, and an upper flange and a lower flange are respectively arranged on the upper and lower sides of the box section.

3. The mobile crane track device based on the main cable of a suspension bridge according to claim 2, characterized in that: The connecting part includes a clamp and a track clamp. The clamp is locked on the main cable. The clamp is arranged at the end of each track section. A plurality of track clamps are arranged on the upper side of the clamp. The track clamp includes a fixing part and an elastic part connected to each other. The fixing part is connected to the upper surface of the clamp. The elastic part is pressed on the lower flange of the track by its own elasticity.

4. The mobile crane track device based on the main cable of a suspension bridge according to claim 3, characterized in that: The elastic member is a strip-shaped member that has been bent multiple times. The two ends of the elastic member are a straight rail-pressing section and a fixed section respectively. The portion of the spring member located between the rail-pressing section and the fixed section is a bent section. The fixed section is connected to the fixed member, and the rail-pressing section is pressed on the lower flange of the track.

5. The mobile crane track device based on the main cable of a suspension bridge according to claim 4, characterized in that: The fixing piece includes an arc-shaped portion, a horizontal cylindrical groove with a fan-shaped cross-section is provided on the lower side of the arc-shaped portion, a slot is formed between the cylindrical groove and the upper side of the clamp, a fixing section of the spring piece is inserted into the slot, and there is friction between the fixing section and the slot. When the external force is greater than the friction force, the fixing section can slide relative to the slot.

6. The mobile crane track device based on the main cable of a suspension bridge according to claim 5, characterized in that: A cable clamp is provided on the main cable, and the upper surface of the clamp is higher than the upper surface of the cable clamp.

7. The mobile crane track device based on the main cable of a suspension bridge according to claim 6, characterized in that: A convex portion is provided at one end of the track, and a concave portion is provided at the other end of the track. The shapes of the convex portion and the concave portion match each other. Pin holes are provided on the convex portion and the concave portion, and connecting pins are provided in the pin holes. At the hinged position of the two tracks, the convex portion of one track is inserted into the concave portion of the other track, and the connecting pin passes through the pin holes of the convex portion and the concave portion at the same time and is rotatably connected to the two pin holes.

8. The mobile crane track device based on the main cable of a suspension bridge according to claim 7, characterized in that: The pin hole is long and strip-shaped.

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