A telescopic steel arch frame and installation trolley device for tunnel

Abstract

The present invention discloses a telescopic steel arch frame and an installation trolley device for tunnels. The telescopic steel arch frame is a centrally symmetrical structure, comprising an outermost plane, an intermediate plane, and an innermost plane that are parallel and coaxially arranged. The outermost plane comprises four arcuate steel arch segments and four composite ball hinges. Each arcuate steel arch segment comprises a small-diameter arcuate steel pipe and a large-diameter arcuate steel pipe. One end of the small-diameter arcuate steel pipe is inserted into the interior of the large-diameter arcuate steel pipe, and the small-diameter arcuate steel pipe can be extended or retracted along the interior of the large-diameter arcuate steel pipe under the action of an external load. The two ends of each arcuate steel arch segment are respectively connected to a composite ball hinge in a rolling connection. The four arcuate steel arch segments and the four composite ball hinges form a closed circle. The present invention can realize integrated support for the tunnel arch frame structure, and the steel arch frame has good stability. Moreover, when the present invention is used for support operations, the entire installation process does not require human intervention, and the degree of mechanization and automation is high.

Description

Technical Field

[0001] The present invention relates to the field of tunnel engineering construction, in particular to a telescopic steel arch frame for a tunnel and an arch frame mounting trolley device. Background Art

[0002] In recent years, the demand for urban underground space development has been enormous. Traditional manual excavation or drilling and blasting methods can no longer meet the growing needs of underground engineering construction, and mechanized operations have become the main construction method. At present, tunnel support structures mainly include segment support, concrete support, and steel arch support. For the former two, corresponding mechanized equipment has been developed and applied in engineering, such as segment assembly machines and concrete pump trucks. However, existing steel arches are mostly connected by flanges and sleeves. Although there are robots for clamping steel arches, a large number of workers are still required on site to complete the welding and fixing processes at the steel arch connections, resulting in high labor intensity and low construction efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a telescopic steel arch frame and an arch frame installation trolley device for tunnels. The specific technical solutions are as follows:

[0004] A telescopic steel arch frame for a tunnel, the telescopic steel arch frame having a centrally symmetrical structure, comprising an outermost plane, an intermediate plane, and an innermost plane arranged parallel to each other and coaxially; the outermost plane comprising four arcuate steel arch segments and four composite ball hinges, each arcuate steel arch segment comprising a small-diameter arcuate steel pipe and a large-diameter arcuate steel pipe, one end of the small-diameter arcuate steel pipe being sleeved within the large-diameter arcuate steel pipe, the small-diameter arcuate steel pipe being capable of extending or retracting along the interior of the large-diameter arcuate steel pipe under the action of an external load; the two ends of each arcuate steel arch segment are respectively connected to one of the composite ball hinges in a rolling connection, and the four arcuate steel arch segments and the four composite ball hinges form a closed circle;

[0005] The structure of the innermost plane is the same as that of the outermost plane;

[0006] The intermediate layer plane includes four cylindrical steel arch segments and four composite ball hinges. Each cylindrical steel arch segment includes a large-diameter cylindrical steel tube and a small-diameter cylindrical steel tube, wherein one end of the small-diameter cylindrical steel tube is sleeved inside the large-diameter cylindrical steel tube, and the small-diameter cylindrical steel tube can extend or retract along the inside of the large-diameter cylindrical steel tube under the action of an external load. The two ends of each cylindrical steel arch segment are respectively connected to a composite ball hinge in a rolling connection. The four cylindrical steel arch segments and the four composite ball hinges form a closed square.

[0007] The four composite ball hinges located on the outermost plane correspond one-to-one with the four composite ball hinges located on the middle plane, and are rollingly connected by four connecting steel arch segments; each connecting steel arch segment comprises two sections of mutually nested cylindrical steel pipes of different diameters; the four composite ball hinges located on the middle plane also correspond one-to-one with the four composite ball hinges located on the innermost plane, and are rollingly connected by four connecting steel arch segments; each connecting steel arch segment comprises two sections of mutually nested cylindrical steel pipes of different diameters;

[0008] Clamping joints are installed on the two arc-shaped steel arch sections spaced apart from each other on the innermost plane and the outermost plane.

[0009] Furthermore, the clamping joint is a block, and a blind hole is opened in the central area of ​​the block.

[0010] A mounting trolley device for a telescopic steel arch frame comprises a supporting platform and a clamping mechanism;

[0011] The support platform is used to provide support for the telescopic steel arch frame to ensure the stability of the telescopic steel arch frame during transportation;

[0012] The clamping mechanism is used to clamp the telescopic steel arch and stretch it into a tunnel steel arch support structure with a specific cross-section;

[0013] The support platform includes a support frame, a first platform and a second platform, a first hydraulic cylinder and a second hydraulic cylinder, wheels, a motor, a first counterweight and a second counterweight, and a vertical slide; the first platform and the second platform are located in a horizontal plane, and the support frame is located in a vertical plane, which is a U-shaped frame. The upper crossbeam of the support frame is connected to the first platform through the first hydraulic cylinder, and the first hydraulic cylinder pushes the first platform to achieve up and down movement; the lower crossbeam of the support frame is connected to the second platform through the second hydraulic cylinder, and the second hydraulic cylinder pushes the second platform to achieve up and down movement; the first counterweight is fixedly connected to one end of the first platform, and the second counterweight is fixedly connected to one end of the second platform; the two side pillars of the support frame are two U-shaped columns, and vertical slides are provided in the U-shaped columns; the wheels are placed at the bottom of the support frame, and are driven by the motor installed on the wheels to achieve forward and backward movement of the support platform;

[0014] The first platform is a Japanese-shaped frame, wherein the outer frame is formed by connecting the crossbeam and the longitudinal beam end to end, and the middle beam is connected to the upper crossbeam of the support frame via the first hydraulic cylinder; a first slider is fixedly installed at the connection between the longitudinal beam and the middle beam, and the first slider can move up and down in the vertical slide groove of the U-shaped column; the first platform is equipped with an oblique slide groove and a radial slide groove parallel to the crossbeam; the oblique slide groove is composed of a pair of slide grooves arranged symmetrically along the longitudinal axis of the platform, and the symmetrically arranged slide grooves form a preset angle with the longitudinal beam;

[0015] The second platform has the same structure as the first platform;

[0016] The clamping mechanism includes a second slider, a top support block and a bottom support block, a connecting block, a robotic arm, and a clamping head; the two ends of the second slider are respectively fixedly connected to the top support block and the bottom support block, and the bottom support block is fixedly connected to the robotic arm through the connecting block; the second slider slides in the radial slide groove or the oblique slide groove; the end of the robotic arm is fixedly connected to the clamping head, and the clamping head is cylindrical and matches the clamping joint of the telescopic steel arch frame.

[0017] Furthermore, there are eight clamping mechanisms, two of which are located in the radial slide groove of the first platform, two in the oblique slide groove of the first platform, two in the radial slide groove of the second platform, and two in the oblique slide groove of the second platform; all two clamping mechanisms in the same radial slide groove or oblique slide groove are arranged symmetrically along the longitudinal axis of the platform.

[0018] Furthermore, the radial chute is formed by two flat plates placed parallel to each other and fixedly connected to the longitudinal beam of the platform, with a space gap provided between the two flat plates.

[0019] The beneficial effects of the present invention are:

[0020] (1) The telescopic steel arch structure of the present invention can realize the integrated forming support of the tunnel arch structure. The steel arch has good stability and does not require on-site splicing, thereby improving the construction efficiency of the tunnel project.

[0021] (2) The telescopic steel arch frame installation trolley proposed in the present invention can smoothly transport the telescopic steel arch frame to the interior of the tunnel, completing the efficient extension support operation of the arch frame structure. The entire installation process does not require human participation and has a high degree of mechanization and automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the telescopic steel arch frame and the arch frame mounting trolley device installed together in an embodiment of the present invention.

[0023] Figure 2 2 is a schematic structural diagram of a telescopic steel arch structure in an embodiment of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the telescopic steel arch frame installation trolley in an embodiment of the present invention.

[0025] Figure 4 It is a structural diagram of the first platform in an embodiment of the present invention.

[0026] Figure 5 2 is a schematic structural diagram of the clamping mechanism in an embodiment of the present invention.

[0027] In the figure, supporting platform 1, supporting frame 1-1, first platform 1-2, second platform 1-3, first hydraulic cylinder 1-4, second hydraulic cylinder 1-5, wheel 1-6, motor 1-7, first counterweight 1-8 and second counterweight 1-9, vertical slide 1-10, crossbeam 1-21, longitudinal beam 1-22, middle beam 1-23, first slider 1-24, radial slide 1-25, oblique slide 1-26, clamping mechanism 2, second slider 2-1, top support block 2-2, bottom support block 2-3, connecting block 2-4, robotic arm 2-5, clamping head 2-6, telescopic steel arch 3, small-diameter arc steel pipe 3-1, large-diameter arc steel pipe 3-2, clamping joint 3-3, composite ball hinge 3-4, small-diameter cylindrical steel pipe 3-5, large-diameter cylindrical steel pipe 3-6. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below based on the accompanying drawings and preferred embodiments. The purpose and effects of the present invention will become more apparent. The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0029] like Figure 1 As shown, a trolley device for installing a telescopic steel arch includes a support platform 1 and a clamping mechanism 2. The support platform 1 is used to provide support for the telescopic steel arch 3 to ensure its stability during transportation. The clamping mechanism 2 is used to clamp the telescopic steel arch 3 and extend it into a tunnel steel arch support structure with a specific cross-section.

[0030] like Figure 2As shown, the telescopic steel arch frame 3 has a centrally symmetrical structure, comprising an outermost plane, an intermediate plane, and an innermost plane. These three planes are parallel and coaxially arranged. The outermost plane includes four curved steel arch segments and four composite ball hinges 3-4. Each steel arch segment comprises two curved steel pipes of different diameters, with the smaller-diameter curved steel pipe 3-1 nested within the larger-diameter curved steel pipe 3-2. The smaller-diameter curved steel pipe 3-1 can extend or retract along the larger-diameter curved steel pipe 3-2 under external load. Each curved steel arch segment is connected to two composite ball hinges 3-4 at each end by a rolling connection. The four steel arch segments and the four composite ball hinges 3-4 form a closed circle. The innermost plane has the same structure as the outermost plane, namely, it also includes four steel arch segments and four composite ball hinges 3-4. Each steel arch segment also comprises two nested curved steel pipes of different diameters. The four steel arch segments and the four composite ball hinges 3-4 form a closed circle. The intermediate plane comprises four cylindrical steel arch segments and four composite ball hinges 3-4. Each cylindrical steel arch segment consists of two cylindrical steel tubes of different diameters. The smaller cylindrical steel tube 3-5 is nested within the larger cylindrical steel tube 3-6. Under external loads, the smaller cylindrical steel tube 3-5 can extend or retract along the larger cylindrical steel tube 3-6. Each cylindrical steel arch segment is connected to the composite ball hinge 3-4 at both ends via a rolling connection. The four cylindrical steel arch segments and the four composite ball hinges 3-4 form a closed square.

[0031] The four composite ball hinges 3-4 located on the outermost plane correspond one-to-one with the four composite ball hinges 3-4 located on the middle plane, and are rollingly connected by four connecting steel arch segments. Each connecting steel arch segment comprises two nested cylindrical steel tubes of different diameters. The four composite ball hinges 3-4 located on the middle plane also correspond one-to-one with the four composite ball hinges 3-4 located on the innermost plane, and are rollingly connected by four connecting steel arch segments. Each connecting steel arch segment comprises two nested cylindrical steel tubes of different diameters. In summary, the telescopic steel arch frame 3 includes a total of twenty steel arch segments and twelve composite ball hinges 3-4.

[0032] like Figure 3 As shown, the arch installation trolley device is primarily used for clamping, supporting, transporting, and extending the telescopic steel arch. It includes a support platform 1 and a clamping mechanism 2. The support platform 1 provides support for the telescopic steel arch 3 to ensure its stability during transportation. The clamping mechanism 2 is used to clamp the telescopic steel arch 3 and extend it into a tunnel steel arch support structure with a specific cross-section.

[0033] The support platform 1 includes a support frame 1-1, a first platform 1-2 and a second platform 1-3, a first hydraulic cylinder 1-4 and a second hydraulic cylinder 1-5, wheels 1-6, a motor 1-7, a first counterweight 1-8 and a second counterweight 1-9, and a vertical slide 1-10. The support frame 1-1 is located in a vertical plane, the first platform 1-2 and the second platform 1-3 are located in a horizontal plane, and the first platform 1-2 and the second platform 1-3 are connected by the first hydraulic cylinder 1-4 and the second hydraulic cylinder 1-5 located in the vertical plane, respectively. The support frame 1-1 is a U-shaped frame, in which the upper crossbeam is connected to the first platform 1-2 by the first hydraulic cylinder 1-4, and the first hydraulic cylinder 1-4 pushes the first platform 1-2 to achieve up and down movement. Similarly, the lower crossbeam of the support frame 1-1 is connected to the second platform 1-3 by the second hydraulic cylinder 1-5, and the second hydraulic cylinder 1-5 pushes the second platform 1-3 to achieve up and down movement. A first counterweight 1-8 is fixedly attached to one end of the first platform 1-2, and a second counterweight 1-9 is fixedly attached to one end of the second platform 1-3. The support frame 1-1 is flanked by U-shaped columns, each containing a vertical chute 1-10. Wheels 1-6 are mounted at the bottom of the support frame 1-1 and driven by motors 1-7 mounted on the wheels 1-6, enabling the support platform 1 to move forward and backward.

[0034] like Figure 4 As shown, the first platform 1-2 is a Japanese-shaped frame, with the outer frame formed by a crossbeam 1-21 and a longitudinal beam 1-22 connected end to end. The intermediate beam 1-23 is connected to the upper crossbeam of the support frame 1-1 via a first hydraulic cylinder 1-4. A first slider 1-24 is fixedly mounted at the junction of the longitudinal beam 1-22 and the intermediate beam 1-23. The slider 1-24 can move up and down within the vertical slot 1-10 of the U-shaped column. The first platform 1-2 is equipped with radial slots 1-25 and diagonal slots 1-26. The radial slots 1-25 consist of two parallel flat plates fixedly attached to the longitudinal beam 1-22 of the platform, with a certain space between them. The diagonal slots 1-26 consist of a pair of slots arranged symmetrically along the longitudinal axis of the platform, at a specific angle to the longitudinal beam 1-22. It is important to note that adjusting this angle allows for different extension ratios of the telescopic steel arch 3. The structure of the second platform 1-3 is identical to that of the first platform 1-2.

[0035] like Figure 5As shown, the clamping mechanism 2 includes a second slider 2-1 installed in the radial slide 1-25 or the oblique slide 1-26, a first support block 2-2 installed on the top of the second slider 2-1, and a second support block 2-3 installed on the bottom, to ensure the stable support of the second slider 2-1 in the radial slide 1-25 or the oblique slide 1-26. A robotic arm 2-5 is installed on one side of the first support block 2-2 and the second support block 2-3, and the two are connected by a connecting block 2-4. A clamping head 2-6 is installed at the end of the robotic arm 2-5, and the clamping head 2-6 is cylindrical. The clamping head 2-6 matches the special clamping joint 3-3 of the telescopic steel arch 3, and the clamping joint 3-3 is a square, in which the central area of ​​the square is dug out to a certain depth by a cylinder of a certain height to form a blind hole. It's important to note that a complete telescopic steel arch installation trolley has eight such clamping mechanisms 2: two in the radial slots 1-25 of the first platform 1-2, two in the diagonal slots 1-26 of the first platform 1-2, two in the radial slots 1-25 of the second platform 1-3, and two in the diagonal slots 1-26 of the second platform 1-3. All two clamping mechanisms 2 in the same radial slot 1-25 or diagonal slot 1-26 are symmetrically arranged along the longitudinal axis of the platform. This also means that a total of eight custom-made clamping joints 3-3 are prefabricated on the telescopic steel arch 3, corresponding to the positions of the clamping joints.

[0036] The tunnel support operation process using the telescopic steel arch and the arch installation trolley device of the present invention is as follows:

[0037] First, prefabricate in the factory Figure 1 The telescopic steel arch frame 3 shown in the figure is then extended into the clamping joint 3-3 at the corresponding position on the telescopic steel arch frame 3 by the clamping head 2-6 of the clamping mechanism 2, so as to clamp the telescopic steel arch frame 3 and place it on the supporting platform 1; the supporting platform 1 and the telescopic steel arch frame 3 on the supporting platform 1 are smoothly transported to the tunnel for installation by driving the wheel 1-6 through the motor 1-7; after arriving at the designated position, the telescopic steel arch frame 3 can be extended along the axial direction of the tunnel by controlling the movement direction and speed of the second slider 2-1 of the clamping mechanism 2 in the radial slide 1-25 and the oblique slide 1-26. At the same time, the first hydraulic cylinder 1-4 and the second hydraulic cylinder 1- 5, the first platform 1-2 and the second platform 1-3 are controlled to move in opposite directions toward the upper and lower beams of the support frame 1-1, so as to realize the extension movement of the telescopic steel arch frame 3 along the cross-sectional direction; when the telescopic steel arch frame 3 is extended to the predetermined tunnel face under the action of the clamping mechanism 2, the clamping mechanism 2 is driven by the second slider 2-1 to return to the initial position, and the first platform 1-2 and the second platform 1-3 are reset to the initial position under the action of the first hydraulic cylinder 1-4 and the second hydraulic cylinder 1-5; the telescopic steel arch frame installation trolley is remotely controlled to return to the outside of the tunnel, and the processes of clamping, transporting, extending, supporting and resetting the telescopic steel arch frame 3 of the next unit are started.

[0038] Those skilled in the art will understand that the foregoing descriptions are merely preferred embodiments of the invention and are not intended to limit the invention. Although the invention has been described in detail with reference to the foregoing examples, those skilled in the art will still be able to modify the technical solutions described in the foregoing examples or substitute equivalents for some of the technical features therein. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the invention shall be included within the scope of protection of the invention.

Claims

1. A telescopic steel arch frame for a tunnel, characterized in that: The telescopic steel arch frame (3) is a centrally symmetrical structure, comprising an outermost plane, a middle layer plane, and an innermost plane that are parallel to each other and coaxially arranged; the outermost plane comprises four arc-shaped steel arch segments and four composite ball hinges (3-4), each arc-shaped steel arch segment comprises a small-diameter arc-shaped steel pipe (3-1) and a large-diameter arc-shaped steel pipe (3-2), one end of the small-diameter arc-shaped steel pipe (3-1) is sleeved inside the large-diameter arc-shaped steel pipe (3-2), and the small-diameter arc-shaped steel pipe (3-1) can be extended or retracted along the inside of the large-diameter arc-shaped steel pipe (3-2) under the action of an external load; the two ends of each arc-shaped steel arch segment are respectively connected to one of the composite ball hinges (3-4) in a rolling connection manner, and the four arc-shaped steel arch segments and the four composite ball hinges (3-4) form a closed circle; The structure of the innermost plane is the same as that of the outermost plane; The intermediate layer plane includes four cylindrical steel arch sections and four composite ball hinges (3-4), each cylindrical steel arch section includes a large-diameter cylindrical steel pipe (3-6) and a small-diameter cylindrical steel pipe (3-5), wherein one end of the small-diameter cylindrical steel pipe (3-5) is sleeved inside the large-diameter cylindrical steel pipe (3-6), and the small-diameter cylindrical steel pipe (3-5) can extend or retract along the inside of the large-diameter cylindrical steel pipe (3-6) under the action of an external load; the two ends of each cylindrical steel arch section are respectively connected to a composite ball hinge (3-4) in a rolling connection manner, and the four cylindrical steel arch sections and the four composite ball hinges (3-4) form a closed square; The four composite ball hinges (3-4) located on the outermost plane correspond one-to-one with the four composite ball hinges (3-4) located on the middle plane, and are connected in a rolling manner via four connecting steel arch sections; each connecting steel arch section comprises two sections of mutually nested cylindrical steel pipes with different calibers; the four composite ball hinges (3-4) located on the middle plane also correspond one-to-one with the four composite ball hinges (3-4) located on the innermost plane, and are connected in a rolling manner via four connecting steel arch sections; each connecting steel arch section comprises two sections of mutually nested cylindrical steel pipes with different calibers; Clamping joints (3-3) are installed on the two arc-shaped steel arch sections spaced apart from each other on the innermost plane and the outermost plane.

2. The telescopic steel arch frame for tunnel according to claim 1, characterized in that: The clamping joint (3-3) is a block, and a blind hole is opened in the central area of ​​the block.

3. A telescopic steel arch mounting trolley device, characterized in that: It comprises a supporting platform (1) and a clamping mechanism (2); The support platform (1) is used to provide support for the telescopic steel arch frame (3) to ensure the stability of the telescopic steel arch frame (3) during transportation; The clamping mechanism (2) is used to clamp the telescopic steel arch (3) and stretch it into a tunnel steel arch support structure with a specific cross-section; The support platform (1) comprises a support frame (1-1), a first platform (1-2) and a second platform (1-3), a first hydraulic cylinder (1-4) and a second hydraulic cylinder (1-5), wheels (1-6), a motor (1-7), a first counterweight (1-8) and a second counterweight (1-9), and a vertical slide (1-10); the first platform (1-2) and the second platform (1-3) are located on a horizontal plane, the support frame (1-1) is located on a vertical plane, and is a U-shaped frame; the upper crossbeam of the support frame (1-1) is connected to the first platform (1-2) via the first hydraulic cylinder (1-4), and the first hydraulic cylinder (1-4) pushes the first platform (1-2) to achieve up and down movement; the support frame (1-1) is provided with a plurality of support members, each of which is provided with a plurality of support members, each of which is provided with a plurality of support members, and a plurality of support members, each of which is provided with a plurality of support members, and a plurality of support members, each of which is provided with a plurality of support members, and a plurality of support members, each of which is provided with a plurality of support members, and a plurality of support members, each of which is provided with a plurality of support members, The lower crossbeam of the support frame (1-1) is connected to the second platform (1-3) via the second hydraulic cylinder (1-5), and the second hydraulic cylinder (1-5) pushes the second platform (1-3) to achieve up and down movement; the first counterweight (1-8) is fixedly connected to one end of the first platform (1-2), and the second counterweight (1-9) is fixedly connected to one end of the second platform (1-3); the two side pillars of the support frame (1-1) are two U-shaped columns, and vertical slide grooves (1-10) are provided in the U-shaped columns; the wheels (1-6) are arranged at the bottom of the support frame (1-1), and are driven by the motor (1-7) installed on the wheels (1-6) to achieve the forward and backward movement of the support platform (1); The first platform (1-2) is a Japanese-shaped frame, wherein the outer frame is formed by connecting a crossbeam (1-21) and a longitudinal beam (1-22) end to end, and the middle beam (1-23) is connected to the upper crossbeam of the support frame (1-1) via the first hydraulic cylinder (1-4); a first slider (1-24) is fixedly installed at the connection between the longitudinal beam (1-22) and the middle beam (1-23), and the first slider (1-24) can move up and down in the vertical slide groove (1-10) of the U-shaped column; an oblique slide groove (1-26) and a radial slide groove (1-25) parallel to the crossbeam are installed on the first platform (1-2); the oblique slide groove (1-26) is composed of a pair of slide grooves symmetrically arranged along the longitudinal axis of the platform, and the symmetrically arranged slide grooves are at a preset angle to the longitudinal beam (1-22); The second platform (1-3) has the same structure as the first platform (1-2); The clamping mechanism (2) comprises a second slider (2-1), a top support block (2-2), a bottom support block (2-3), a connecting block (2-4), a mechanical arm (2-5), and a clamping head (2-6); the two ends of the second slider (2-1) are respectively fixedly connected to the top support block (2-2) and the bottom support block (2-3), and the bottom support block (2-3) is fixedly connected to the mechanical arm (2-5) through the connecting block (2-4); the second slider (2-1) slides in the radial slide groove (1-25) or the oblique slide groove (1-26); the end of the mechanical arm (2-5) is fixedly connected to the clamping head (2-6), and the clamping head (2-6) is cylindrical and matches the clamping joint (3-3) of the telescopic steel arch frame (3).

4. The installation trolley device for the telescopic steel arch according to claim 3, characterized in that: There are eight clamping mechanisms (2), two of which are located in the radial slide groove (1-25) of the first platform (1-2), two in the oblique slide groove (1-26) of the first platform (1-2), two in the radial slide groove (1-25) of the second platform (1-3), and two in the oblique slide groove (1-26) of the second platform (1-3); all two clamping mechanisms (2) in the same radial slide groove (1-25) or oblique slide groove (1-26) are symmetrically arranged along the longitudinal axis of the platform.

5. The installation trolley device for the telescopic steel arch according to claim 3, characterized in that: The radial chute (1-25) is formed by two flat plates placed parallel to each other and fixedly connected to the longitudinal beam (1-22) of the platform, with a space gap being provided between the two flat plates.

Images