Construction device for middle lifting and horizontal tensioning of large-span steel pipe arch

Abstract

The utility model discloses a construction device for middle lifting and horizontal tensioning of a large-span steel pipe arch. The construction device comprises two pairs of steel pipe supports, support caps, a first steel cable type hydraulic lifting machine, a lifting table, a first hydraulic cylinder, a clamping plate, a point location fixing device, an operation table and a horizontal tensioning device. The support cap is fixedly installed between the tops of the pair of steel pipe supports. The movable point location fixing device is connected between the steel pipe arch and the support cap; the operating platform is connected to the top of the lifting platform; the horizontal tensioning devices are connected to the two sides of the steel pipe arch. The steel pipe arch is guided and supported during lifting through the steel pipe support, the first steel cable type hydraulic hoister can provide power for lifting of the steel pipe arch and clamp and fix the steel pipe arch, in order to prevent the steel pipe arch from losing stability in the lifting process, the point location fixing device can assist in lifting of the steel pipe arch, and the stability of the steel pipe arch during lifting is improved; and dangerous phenomena are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of middle-part lifting of steel pipe arches, and particularly relates to a construction device for middle-part lifting and horizontal tensioning of a large-span steel pipe arch. Background Art

[0002] The long-span steel tube arch is a type of bridge structure, which mainly consists of arch ribs and bridge deck systems made of steel tubes and concrete.

[0003] The purpose of horizontal tensioning during the lifting process of the middle part of a large-span steel tube arch is to ensure the geometric shape and stress state of the arch truss and prevent the arch truss from deformation or instability during the lifting process.

[0004] During the lifting process of the steel pipe arch, due to the influence of wind factors, the steel pipe arch will shake during the lifting process, so there is an urgent need for a construction device that can keep the steel pipe arch stable during the lifting process. Utility Model Content

[0005] Based on the above technical problems, the utility model provides a construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch.

[0006] The specific technical solution is:

[0007] A construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch, comprising:

[0008] Two pairs of steel pipe supports, with a steel pipe arch arranged between the two pairs of steel pipe supports;

[0009] A bracket cap, the bracket cap being fixedly installed between the tops of a pair of steel pipe brackets;

[0010] first steel cable hydraulic hoists, two pairs of which are fixedly mounted on the top of the bracket cap;

[0011] A lifting platform, wherein the steel pipe bracket passes through the lifting platform;

[0012] a first hydraulic cylinder, wherein a pair of telescopic ends of the first hydraulic cylinder are respectively connected to two sides of the lifting platform;

[0013] A clamping plate connected to the telescopic ends of a pair of first hydraulic cylinders;

[0014] A point fixing device connected between the steel pipe arch and the bracket cap;

[0015] An operating platform connected to the top of the lifting platform;

[0016] A horizontal tensioning device is connected to both sides of the steel tube arch.

[0017] In the above technical solution, the point fixing device includes:

[0018] a second steel cable type hydraulic hoist, a pair of said second steel cable type hydraulic hoists being hinged to the top of the bracket cap;

[0019] A pair of side brackets, wherein a first electric push rod is fixedly mounted on one side of the side bracket, the telescopic ends of the electric push rods are both connected to electric motors, and the driving ends of the electric motors are connected to rollers;

[0020] an intermediate frame slidably connected between a pair of side frames;

[0021] An intermediate motor, the intermediate motor is fixedly mounted on one side of the intermediate frame, a first bevel gear is connected to the driving end of the intermediate motor, a bidirectional threaded rod is movably mounted in the intermediate frame, the bidirectional threaded rod is screwed to the side bracket, a second bevel gear is connected to the middle of the bidirectional threaded rod, and the first bevel gear is meshed with the second bevel gear;

[0022] The second electric push rod is fixedly mounted on both sides of the intermediate frame, and the telescopic end of the second electric push rod is connected with a push plate.

[0023] The above technical solution also includes:

[0024] Blind plates, a pair of said blind plates are fixedly connected to one side of the clamping plate, and said blind plates are connected to one end of the steel pipe arch.

[0025] The above technical solution also includes:

[0026] A buffer limit seat, the buffer limit seat is connected to the lower wall of the bracket cap, the adjusting threaded rod is screwed to the buffer limit seat, and the top of the adjusting threaded rod is movably connected to the bracket cap;

[0027] An adjusting motor, wherein the adjusting motor is fixedly mounted on the top of the bracket cap, and a driving end of the adjusting motor is connected to the top of the adjusting threaded rod;

[0028] A side plate, a side wall of the buffer limit seat slides on the side plate.

[0029] In the above technical solution, the horizontal tensioning device includes:

[0030] The third steel cable type hydraulic hoist, two pairs of the third steel cable type hydraulic hoists are respectively fixedly connected to both sides of the steel pipe arch.

[0031] The above technical solution also includes:

[0032] A climbing frame is fixedly connected to the inside of the steel pipe support.

[0033] Compared with the prior art, the utility model provides a construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch, which has the following beneficial effects:

[0034] The steel pipe arch is guided and supported during lifting by the steel pipe bracket. The first steel cable hydraulic hoist can provide power for the lifting of the steel pipe arch and lift the lifting platform. At the same time, since the lifting platform is connected to the steel pipe arch, the clamping plate can adapt to the width of the steel pipe arch and clamp it. In order to prevent the steel pipe arch from becoming unstable during the lifting process, the point fixing device can assist in lifting the steel pipe arch, improve the stability of the steel pipe arch during lifting, and prevent dangerous phenomena from occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of a construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to the present invention;

[0036] Figure 2 It is a side view schematic diagram of the utility model;

[0037] Figure 3 It is an enlarged schematic diagram of the local structure of the utility model;

[0038] Figure 4 This is a schematic diagram of the internal structure of the point fixing device of the utility model.

[0039] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0040] 1. Steel pipe support; 2. Support cap; 3. First steel rope hydraulic hoist; 4. Lifting platform; 5. First hydraulic cylinder; 6. Clamping plate; 7. Operating table; 8. Second steel rope hydraulic hoist; 9. Side support; 10. Intermediate frame; 11. Intermediate motor; 12. Second electric push rod; 13. Blind plate; 14. Buffer limit seat; 15. Adjustment motor; 16. Side plate; 17. Third steel rope hydraulic hoist; 18. Climbing frame. DETAILED DESCRIPTION

[0041] The following is a combination of specific implementation cases and attached Figure 1-4 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0042] like Figure 1-4As shown, the utility model discloses a construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch, comprising: two pairs of steel pipe supports 1, a support cap 2, a first steel cable type hydraulic hoist 3, a lifting platform 4, a first hydraulic cylinder 5, a clamping plate 6, a point fixing device, an operating table 7 and a horizontal tensioning device; a steel pipe arch is arranged between the two pairs of steel pipe supports 1, and the support cap 2 is fixedly installed between the tops of a pair of steel pipe supports 1; the two pairs of first steel cable type hydraulic hoists 3 are both fixedly installed on the tops of the support caps 2; the steel pipe supports 1 pass through the lifting platform 4; the telescopic ends of a pair of first hydraulic cylinders 5 are respectively connected to both sides of the lifting platform 4; the clamping plate 6 is connected to the telescopic ends of a pair of first hydraulic cylinders 5; the point fixing device is connected between the steel pipe arch and the support cap 2; the operating table 7 is connected to the top of the lifting platform 4; and the horizontal tensioning device is connected to both sides of the steel pipe arch.

[0043] In the embodiment of the present utility model, as Figure 1-4 As shown, the point fixing device includes: a second steel cable type hydraulic hoist 8, a pair of side brackets 9, an intermediate frame 10, an intermediate motor 11, a second electric push rod 12 and a cable ring; a pair of second steel cable type hydraulic hoists 8 are hinged to the top of the bracket cap 2; a first electric push rod is fixedly installed on one side of the side bracket 9, and the telescopic ends of the electric push rods are connected to electric motors, and the driving ends of the electric motors are connected to rollers; the intermediate frame 10 is slidably connected between the pair of side brackets 9; the intermediate motor 11 is fixedly installed on one side of the intermediate frame 10, and the driving end of the intermediate motor 11 is connected to the first bevel gear, and a two-way threaded rod is movably installed in the intermediate frame 10, and the two-way threaded rod is screwed to the side bracket 9, and the middle of the two-way threaded rod is connected to the second bevel gear, and the first bevel gear is engaged with the second bevel gear; the second electric push rod 12 is fixedly installed on both sides of the intermediate frame 10, and the telescopic ends of the second electric push rod 12 are connected to push plates; the cable ring is connected to the top of the side bracket 9 at the top.

[0044] In the embodiment of the present utility model, as Figure 1-4 As shown, it also includes: a blind plate 13; a pair of blind plates 13 are fixedly connected to one side of the clamping plate 6, and the blind plate 13 is connected to one end of the steel pipe arch.

[0045] In the embodiment of the present utility model, as Figure 1-4 As shown, it also includes: a buffer limit seat 14, an adjusting motor 15 and a side plate 16; the buffer limit seat 14 is connected to the lower wall of the bracket cap 2, the adjusting threaded rod is screwed to the buffer limit seat 14, and the top of the adjusting threaded rod is movably connected to the bracket cap 2; the adjusting motor 15 is fixedly installed on the top of the bracket cap 2, and the driving end of the adjusting motor 15 is connected to the top of the adjusting threaded rod; one side wall of the buffer limit seat 14 slides on the side plate 16.

[0046] In the embodiment of the present utility model, as Figure 1-4As shown, the horizontal tensioning device includes: a third steel cable type hydraulic hoist 17; two pairs of third steel cable type hydraulic hoists 17 are fixedly connected to both sides of the steel pipe arch respectively.

[0047] In the embodiment of the present utility model, as Figure 1-4 As shown, it also includes: a climbing frame 18; the climbing frame 18 is fixedly connected to the inside of the steel pipe support 1.

[0048] Implementation process: First, place the two ends of the steel pipe arch between a pair of steel pipe supports 1 and the clamping plate 6, control the extension of the telescopic end of the first hydraulic cylinder 5, and then weld one end of the steel pipe arch to the blind plate 13 to complete the installation. Control the first bevel gear at the driving end of the intermediate motor 11 to rotate. At this time, the second bevel gear rotates and the bidirectional threaded rod rotates. At this time, a pair of side supports 9 move toward each other until the final point fixing device is fixed to the steel pipe arch. Then control the driving end of the electric motor to rotate to rotate the roller and at the same time make the push plate squeeze the side wall of the steel pipe arch. Then the point fixing device moves along the specified point on the steel pipe arch. Control the speed of the electric motor so that the moving speed of the roller should not be too fast. The side wall of the roller should be equipped with a tire with high friction to prevent slipping. When moving, the cable at the driving end of the second steel cable hydraulic hoist 8 cooperates to retract until the cable is The rope is tightened, and then the push plate at the driving end of the second electric push rod 12 is controlled to fit the side wall of the steel pipe arch, and then the lifting begins. The cable at the driving end of the first steel cable type hydraulic hoist 3 is controlled to be retracted to lift the steel pipe arch. During the lifting, a pair of driving ends of the third steel cable type hydraulic hoist 17 are connected to each other by the same cable. Before the lifting begins, the horizontal cable is tensioned with pre-tensioning force. After the first steel cable type hydraulic hoist 3 is loaded step by step to 100%, the horizontal cable is also tensioned to 100% of the designed tensioning force, and the lifting force is slowly increased to lift the steel pipe arch into the air, so that the cable is in a taut state. While lifting, the cable at the driving end of the second steel cable type hydraulic hoist 8 is controlled to be gradually retracted, so that the cable at the driving end of the second steel cable type hydraulic hoist 8 is always in a taut state. At this time, the lifting process of the steel pipe arch always remains stable.

[0049] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can mean a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0050] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiments," etc., mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this utility model, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch, characterized in that: include: Two pairs of steel pipe supports, with a steel pipe arch arranged between the two pairs of steel pipe supports; A bracket cap, the bracket cap is fixedly installed between the tops of a pair of steel pipe brackets; A first steel cable type hydraulic hoist, two pairs of said first steel cable type hydraulic hoists are fixedly mounted on the top of the bracket cap; A lifting platform, wherein the steel pipe bracket runs through the lifting platform; A first hydraulic cylinder, wherein a pair of telescopic ends of the first hydraulic cylinder are respectively connected to two sides of the lifting platform; A clamping plate connected to a pair of telescopic ends of a first hydraulic cylinder; A point fixing device, the point fixing device is connected between the steel pipe arch and the bracket cap; An operating platform connected to the top of the lifting platform; A horizontal tensioning device is connected to both sides of the steel tube arch.

2. The construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to claim 1 is characterized in that: The point fixing device comprises: A second steel cable type hydraulic hoist, a pair of said second steel cable type hydraulic hoists are hingedly connected to the top of the bracket cap; A pair of side brackets, a first electric push rod is fixedly mounted on one side of the side bracket, the telescopic ends of the electric push rod are both connected to an electric motor, and the driving end of the electric motor is connected to a roller; An intermediate frame, the intermediate frame being slidably connected between a pair of side frames; An intermediate motor, the intermediate motor is fixedly installed on one side of the intermediate frame, a first bevel gear is connected to the driving end of the intermediate motor, a bidirectional threaded rod is movably installed in the intermediate frame, the bidirectional threaded rod is screwed to the side bracket, a second bevel gear is connected in the middle of the bidirectional threaded rod, and the first bevel gear is meshed with the second bevel gear; The second electric push rod is fixedly mounted on both sides of the intermediate frame, and the telescopic end of the second electric push rod is connected with a push plate.

3. The construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to claim 2 is characterized in that: Also includes: Blind plates, a pair of blind plates are fixedly connected to one side of the clamping plate, and the blind plates are connected to one end of the steel pipe arch.

4. The construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to claim 1 is characterized in that: Also includes: A buffer limit seat, wherein the buffer limit seat is connected to the lower wall of the bracket cap, the adjusting threaded rod is screwed to the buffer limit seat, and the top of the adjusting threaded rod is movably connected to the bracket cap; An adjusting motor, wherein the adjusting motor is fixedly mounted on the top of the bracket cap, and a driving end of the adjusting motor is connected to the top of the adjusting threaded rod; A side plate, a side wall surface of the buffer limit seat slides on the side plate.

5. The construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to claim 1 is characterized in that: The horizontal tensioning device comprises: The third steel cable type hydraulic hoist, two pairs of the third steel cable type hydraulic hoists are respectively fixedly connected to both sides of the steel pipe arch.

6. The construction device for lifting and horizontally tensioning the middle part of a large-span steel pipe arch according to claim 1 is characterized in that: Also includes: A climbing frame is fixedly connected to the inside of the steel pipe support.

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