Gantry crane for installation of pipes in limited spaces

Abstract

The utility model discloses a portal crane for pipeline installation in limited space, including base, support leg, running gear and crossbeam, the running gear is installed below base, the support leg is installed in the middle part of base upper surface, the crossbeam both ends corresponding installation is formed portal structure on both sides' support leg, its characterized in that, the base includes ground beam, stand and directional damping mechanism, the stand is vertically installed on the middle part of ground beam upper surface, the support leg is installed on the stand, the directional damping mechanism is installed on the both ends of ground beam, and directional damping mechanism is directional damping trundle with spring damping function, and the limiting wheel of the front end of ground beam is more protruding to the outside and the front of crane whole, and the limiting wheel of the rear end of ground beam is more protruding to the outside and the rear of crane whole. The utility model improves crane for pipeline installation in limited space's applicability and crane's safety stability.

Description

Technical Field

[0001] This utility model belongs to pipeline installation technology, and in particular relates to a gantry crane for pipeline installation in confined spaces. Background Technology

[0002] Gantry cranes, also known as portal cranes, traditionally require fixed tracks, restricting their movement during operation. However, existing trackless gantry cranes significantly alter this structure, allowing for free movement without tracks. Traditional pipe installation involves manual labor combined with cranes. However, conventional gantry cranes are often unsuitable for installations in confined spaces such as underground utility tunnels and corridors. Furthermore, conventional trackless gantry cranes, based on tires, suffer from unstable movement, especially under load, making them prone to tilting or collisions, severely impacting construction safety and progress. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gantry crane for pipe installation in confined spaces, so as to solve the problem of poor safety and stability of crane movement when existing gantry cranes are used for pipe installation in confined spaces.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0005] A gantry crane for pipe installation in confined spaces includes a base, outriggers, a traveling mechanism, and a crossbeam. The traveling mechanism is installed below the base, the outriggers are installed in the middle of the upper surface of the base, and the two ends of the crossbeam are correspondingly installed on the outriggers on both sides to form a gantry structure. The base includes a ground beam, a column, and a directional damping mechanism. The column is vertically installed in the middle of the upper surface of the ground beam, and the outriggers are installed on the column. The directional damping mechanism is installed at both ends of the ground beam and consists of directional damping casters with spring damping function. The damping caster at the front end of the ground beam protrudes outward and forward relative to the crane as a whole, and the damping caster at the rear end of the ground beam protrudes outward and backward relative to the crane as a whole.

[0006] Furthermore, the directional damping mechanism is provided with a mounting base, a spring, and a roller frame. The mounting base is installed at the end of the ground beam and has two horizontally outward support plates. The wheel is rotatably mounted on the front end of the roller frame via a roller shaft. The middle part of the roller frame is rotatably mounted on the two support plates via a rotating pin. One end of the spring is fixedly connected to the mounting base, and the other end is connected to the rear end of the roller frame.

[0007] Furthermore, the mounting base includes a base plate, an adjusting plate, a positioning plate, and a seat plate. The base plate is welded and fixed to the end face of the ground beam. The base plate has a horizontal oblong hole above and below the ground beam. The adjusting plate is fixed to the outer surface of the base plate by bolts passing through the oblong holes. The positioning plate is an angle plate, and two positioning plates are vertically fixed to the upper and lower ends of the adjusting plate. The two ends of the seat plate are respectively overlapped and fixed to the two positioning plates. The support plate is welded and fixed to the seat plate, and one end of the spring is fixed to the seat plate.

[0008] Furthermore, the column is a hollow tubular structure, and the support legs are movably inserted into the inner cavity of the column. The support legs and the column are movably connected through a lifting mechanism.

[0009] Furthermore, the outrigger is composed of multiple telescopically connected segments, each segment being connected by high-strength bolts and positioning pins, and the bottommost segment being movably connected to the column via a lifting mechanism.

[0010] Furthermore, the base also includes two diagonal braces, which are symmetrically arranged on both sides of the column. The lower ends of the two diagonal braces are fixed to the two ends of the ground beam near the walking mechanism, and the upper ends of the two diagonal braces are fixedly connected to the upper end of the column.

[0011] Furthermore, the lifting mechanism includes a hand-cranked winch with a two-way self-locking function, a steel wire rope, a fixed pulley, and a rope clamp. The hand-cranked winch is installed on the outer side of one of the two diagonal supports, the fixed pulley is fixedly installed on the top of the diagonal support, and the rope clamp is fixedly installed on the upper end of the column and located above the other diagonal support. Guide shafts are installed at both ends of the bottom of the outriggers. One end of the steel wire rope is fixed to the hand-cranked winch, and the other end is fixed to the rope clamp after passing through the fixed pulley and the two guide shafts. The rope clamp is a bolt assembly.

[0012] Furthermore, the walking mechanism includes a drive motor installed at one end of the ground beam, an active caster that is connected to the motor and whose rotating shaft is perpendicular to the length direction of the ground beam, and a driven caster installed at the other end of the ground beam. The driven caster is a swivel wheel with a braking function.

[0013] Furthermore, the driving caster is a polyurethane steel wheel, and the driven caster is provided with a lead screw at the top. The driven caster is fixedly connected to the ground beam by the lead screw passing through nuts above and below the ground beam.

[0014] Furthermore, an electric hoist is slidably mounted on the crossbeam, and travel limit switches are installed at both ends of the crossbeam; a control box is installed on one side of the column, and the control box is connected to the electric hoist and the drive motor respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features directional shock-absorbing casters with spring damping function installed at both ends of the ground beam. The caster at the front end of the ground beam protrudes outward and forward relative to the crane as a whole, while the caster at the rear end of the ground beam protrudes outward and backward relative to the crane as a whole. Therefore, when the crane is loaded and moving forward or backward, in the event of a lateral or front-to-back collision, the directional shock-absorbing casters with spring damping function will always be the first to make contact, effectively avoiding or reducing safety accidents caused by hard collisions and improving the safety and stability of the crane.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Attached Figure Description

[0018] Figure 1 This is a front view of the crane during construction.

[0019] Figure 2 This is a side view of the crane of this utility model;

[0020] Figure 3 This is a top view of the crane of this utility model;

[0021] Figure 4 for Figure 1 Enlarged view of part A;

[0022] Figure 5 for Figure 2 Enlarged view of part B;

[0023] Figure 6 for Figure 2 Enlarged view of part C;

[0024] Figure 7 for Figure 3 A magnified view of part D.

[0025] The labels and their corresponding names in the diagram are as follows:

[0026] 1. Base, 11. Ground beam, 12. Column,

[0027] 13. Directional damping mechanism; 131. Mounting base; 1311. Base plate.

[0028] 1312. Adjusting plate, 1313. Positioning plate, 1314. Seat plate,

[0029] 1315. Support plate, 132. Spring, 133. Roller frame,

[0030] 134. Wheel, 14. Diagonal brace, 2. Support leg,

[0031] 3. Crossbeam; 31. Limit switch; 4. Electric trolley;

[0032] 5. Electric hoist, 6. Traveling mechanism, 61. Drive motor,

[0033] 62. Driven caster; 63. Driven caster; 64. Lead screw;

[0034] 7. Control box, 8. Lifting mechanism, 81. Hand-cranked winch,

[0035] 82. Steel wire rope; 83. Fixed pulley; 84. Rope clamp;

[0036] 85. Guide shaft. Detailed Implementation

[0037] like Figure 1-3As shown, a gantry crane for pipe installation in confined spaces includes a base 1, outriggers 2, a crossbeam 3, a control box 7, and a traveling mechanism 6. The outriggers 2 are mounted on the middle of the upper surface of the base 1. The two ends of the crossbeam 3 are correspondingly mounted on the outriggers 2 on both sides, forming a gantry structure. The traveling mechanism 6 is mounted below the base 1 and is used to move the base 1 and its entire structure. An electric trolley 4 is mounted on the crossbeam 3 and connected to an electric hoist 5, driving the electric hoist 5 to move horizontally along the crossbeam 3. Limit switches 31 are installed at both ends of the crossbeam 3 to limit the travel of the electric trolley 4. The control box 7 is mounted on the base 1 and is connected to the electric trolley 4, the electric hoist 5, and the traveling mechanism 6, respectively, for driving the operation of the electric trolley 4, the electric hoist 5, and the traveling mechanism 6. The crossbeam 3 is made of I-beam steel, and the electric trolley 4 and electric hoist 5 used for lifting pipes are 1t electric trolley single-chain single-speed 3m 380V electric hoists. The base 1 mainly includes a ground beam 11, a column 12, a directional damping mechanism 13, and two diagonal braces 14. The column 12 is a hollow tubular structure, vertically fixed to the middle of the upper surface of the ground beam 11. The outriggers 2 are movably inserted into the inner cavity of the column 12, and the outriggers 2 are movably connected to the column 12 through a lifting mechanism 8. The two diagonal braces 14 are symmetrically arranged on both sides of the column 12, and the lower ends of the two diagonal braces 14 are fixed to the two ends of the ground beam 11 near the position of the traveling mechanism 6, and the upper ends of the two diagonal braces 14 are fixedly connected to the upper end of the column 12. The directional damping mechanism 13 is installed at both ends of the ground beam 11. The directional damping mechanism 13 is a directional damping caster with a spring 132 for damping. The damping caster wheel body 134 located at the front end of the ground beam 11 protrudes outward and forward from the crane as a whole, and the damping caster wheel body 134 located at the rear end of the ground beam 11 protrudes outward and backward from the crane as a whole.

[0038] This invention utilizes directional shock-absorbing casters with spring damping function installed at both ends of the ground beam. The casters at the front end of the ground beam protrude outward and forward relative to the crane as a whole, while the casters at the rear end protrude outward and backward relative to the crane as a whole. Therefore, when the crane is loaded and moving forward or backward, in the event of a lateral or frontal collision, the directional shock-absorbing casters with spring damping function will always be the first to make contact, effectively avoiding or reducing safety accidents caused by hard collisions and improving the safety and stability of the crane. Furthermore, by movably inserting outriggers into the inner cavity of the column, and connecting the outriggers and the column via a lifting mechanism, the height of the crossbeam can be adjusted via the lifting mechanism. This allows for adaptive adjustments when installing pipelines in underground spaces at different heights.

[0039] As a preferred option, such as Figure 4 , 5As shown in Figure 7, the directional damping mechanism 13 includes a mounting base 131, a spring 132, a roller frame 133, and a damping caster wheel 134. The mounting base 131 is installed at the end of the ground beam 11 and has two horizontally outward support plates 1315. The wheel 134 is rotatably mounted on the front end of the roller frame 133 via a roller shaft. The middle part of the roller frame 133 is rotatably mounted on the two support plates 1315 via a rotating pin. One end of the spring 132 is fixedly connected to the mounting base 131, and the other end is connected to the rear end of the roller frame 133. Specifically, the mounting base 131 is provided with a base plate 1311, an adjusting plate 1312, a positioning plate 1313, and a seat plate 1314. The base plate 1311 is welded and fixed to the end face of the ground beam 11. The base plate 1311 has a horizontal waist-shaped hole at the top and bottom of the ground beam 11. The adjusting plate 1312 is fixed to the outer surface of the base plate 1311 by bolts passing through the waist-shaped holes. The positioning plate 1313 consists of two corner plates, which are vertically fixed to the upper and lower ends of the adjusting plate 1312. The two ends of the seat plate 1314 are respectively overlapped and welded to the two positioning plates 1313. The support plate 1315 is welded and fixed to the seat plate 1314. One end of the spring 132 is fixed to the seat plate 1314.

[0040] This utility model's directional shock absorption mechanism adjusts the lateral protrusion distance of the wheel body by setting a waist-shaped hole on the base plate and adjusting the position of the adjustment plate on the base plate by bolts inserted through the waist-shaped hole, thereby adapting to the safety and stability of the crane when moving under load under different road widths.

[0041] As a preferred option, such as Figure 2 , 6 As shown, the lifting mechanism 8 includes a hand-cranked winch 81 with a two-way self-locking function, a steel wire rope 82, a fixed pulley 83, and a rope clamp 84. The hand-cranked winch 81 is installed on the outer side of one of the two diagonal supports 14. The fixed pulley 83 is fixedly installed on the top of the diagonal support 14. The rope clamp 84 is fixedly installed on the upper end of the column 12 and is located above the other diagonal support 14. Guide shafts 85 are installed at both ends of the bottom of the outrigger 2. One end of the steel wire rope 82 is fixed to the hand-cranked winch 81, and the other end is fixed to the rope clamp 84 after passing through the fixed pulley 83 and the two guide shafts 85. The rope clamp 84 is a bolt assembly. More preferably, the outrigger 2 is composed of multiple telescopically connected segments. Each segment is connected to the other by high-strength bolts and positioning pins. The bottommost segment is movably connected to the column 12 through the lifting mechanism 8.

[0042] This invention utilizes a hand-cranked winch with a two-way self-locking function to control the raising and lowering of the outriggers. The outriggers are composed of multiple telescopically connected segments, each connected by high-strength bolts and locating pins. This allows for the addition or reduction of the number of beam segments as needed, and independent control of the outrigger height on each side. This ensures the horizontality of the crossbeam remains stable even when the road surfaces on both sides are at different heights, guaranteeing the safety and stability of pipeline transportation.

[0043] As a preferred option, such as Figure 2 , 5 As shown, the traveling mechanism 6 includes a drive motor 61 mounted at one end of the ground beam 11, an active caster 62 connected to the motor with its shaft perpendicular to the length of the ground beam 11, and a driven caster 63 mounted at the other end of the ground beam 11. Specifically, the active caster 62 is a φ250mm wide, 50mm axle hole, 40mm heavy-duty polyurethane steel wheel with a rubber tire mounted on the outside. The active caster 62 is driven by a reducer connected to the drive motor 61. The driven caster 63 is a φ150mm lead screw 64 with brake, swivel heavy-duty polyurethane caster. The lead screw 64 is located at the top of the caster, and the driven caster 63 is fixedly connected to the ground beam 11 by nuts passing through the lead screw 64 above and below the ground beam 11. This invention increases the friction with the ground by using large-diameter, wide-tread rubber tires, thus improving the stability of the crane's travel.

[0044] This utility model is not limited to the specific embodiments described above. For those skilled in the art, all modifications made based on the above concept without creative effort fall within the protection scope of this utility model.

Claims

1. A gantry crane for pipe installation in a confined space, comprising a base, outriggers, a traveling mechanism, and a crossbeam, wherein the traveling mechanism is installed below the base, the outriggers are installed on the middle of the upper surface of the base, and the two ends of the crossbeam are respectively installed on the outriggers on both sides to form a gantry structure; characterized in that, The base includes a ground beam, a column, and a directional damping mechanism. The column is vertically installed in the middle of the upper surface of the ground beam, and the support legs are installed on the column. The directional damping mechanism is installed at both ends of the ground beam. The directional damping mechanism is a directional damping caster with spring damping function. The damping caster at the front end of the ground beam protrudes outward and forward relative to the crane as a whole, and the damping caster at the rear end of the ground beam protrudes outward and backward relative to the crane as a whole.

2. A gantry crane for pipe installation in a confined space according to claim 1, characterized in that, The directional damping mechanism is provided with a mounting base, a spring and a roller frame. The mounting base is installed at the end of the ground beam and has two horizontally outward support plates. The wheel is rotatably mounted on the front end of the roller frame via a roller shaft. The middle part of the roller frame is rotatably mounted on the two support plates via a rotating pin. One end of the spring is fixedly connected to the mounting base and the other end is connected to the rear end of the roller frame.

3. A gantry crane for pipe installation in a confined space according to claim 2, characterized in that, The mounting base includes a base plate, an adjusting plate, a positioning plate, and a seat plate. The base plate is welded and fixed to the end face of the ground beam. The base plate has a horizontal waist-shaped hole above and below the ground beam. The adjusting plate is fixed to the outer surface of the base plate by bolts passing through the waist-shaped holes. The positioning plate is an angle plate, and two positioning plates are vertically fixed to the upper and lower ends of the adjusting plate. The two ends of the seat plate are respectively overlapped and fixed to the two positioning plates. The support plate is welded and fixed to the seat plate, and one end of the spring is fixed to the seat plate.

4. A gantry crane for pipe installation in a confined space according to claim 1, characterized in that, The column is a hollow tubular structure, and the support legs are movably inserted into the inner cavity of the column. The support legs and the column are movably connected through a lifting mechanism.

5. A gantry crane for pipe installation in a confined space according to claim 4, characterized in that, The outrigger is composed of multiple telescopically connected segments, each segment being connected by high-strength bolts and positioning pins, and the bottom segment being movably connected to the column via a lifting mechanism.

6. A gantry crane for pipe installation in a confined space according to claim 4, characterized in that, The base also includes two diagonal braces, which are symmetrically arranged on both sides of the column. The lower ends of the two diagonal braces are fixed to the two ends of the ground beam near the walking mechanism, and the upper ends of the two diagonal braces are fixedly connected to the upper end of the column.

7. A gantry crane for pipe installation in a confined space according to claim 6, characterized in that, The lifting mechanism includes a hand-cranked winch with a two-way self-locking function, a steel wire rope, a fixed pulley, and a rope clamp. The hand-cranked winch is installed on the outer side of one of the two diagonal supports, the fixed pulley is fixedly installed on the top of the diagonal support, and the rope clamp is fixedly installed on the upper end of the column and located above the other diagonal support. Guide shafts are installed at both ends of the bottom of the outriggers. One end of the steel wire rope is fixed to the hand-cranked winch, and the other end is fixed to the rope clamp after passing through the fixed pulley and the two guide shafts. The rope clamp is a bolt assembly.

8. A gantry crane for pipe installation in a confined space according to claim 1, characterized in that, The walking mechanism includes a drive motor installed at one end of the ground beam, an active caster connected to the motor and whose rotating shaft is perpendicular to the length direction of the ground beam, and a driven caster installed at the other end of the ground beam. The driven caster is a swivel wheel with a braking function.

9. A gantry crane for pipe installation in a confined space according to claim 8, characterized in that, The active caster is a polyurethane steel wheel, and the driven caster is equipped with a lead screw at the top. The driven caster is fixedly connected to the ground beam by the lead screw passing through nuts above and below the ground beam.

10. A gantry crane for pipe installation in a confined space according to claim 8, characterized in that, An electric hoist is slidably mounted on the crossbeam, and travel limit switches are installed at both ends of the crossbeam; a control box is installed on one side of the column, and the control box is connected to the electric hoist and the drive motor respectively.

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