Telescopic steel arch for tunnel and installation trolley device

Abstract

The invention discloses a telescopic steel arch for a tunnel and a mounting trolley device, and the telescopic steel arch is of a central symmetry structure and comprises an outermost side plane, a middle layer plane and an innermost side plane which are parallel to one another and are coaxially arranged; the outermost plane comprises four arc-shaped steel arch sections and four composite spherical hinges, each arc-shaped steel arch section comprises a small-caliber arc-shaped steel pipe and a large-caliber arc-shaped steel pipe, and one end of each small-caliber arc-shaped steel pipe is sleeved with the corresponding large-caliber arc-shaped steel pipe. The small-caliber arc-shaped steel pipe can stretch out or retract along the interior of the large-caliber arc-shaped steel pipe under the action of an external load; the two ends of each arc-shaped steel arch section are connected with one composite spherical hinge in a rolling connection mode, and the four arc-shaped steel arch sections and the four composite spherical hinges form a closed circle. Integrally-formed supporting of the tunnel arch frame structure can be achieved, and the stability of the steel arch frame is good; and when the device is used for supporting operation, the whole mounting process does not need manual participation, and the mechanization and automation degree is high.

Description

Technical Field

[0001] The invention relates to the field of tunnel engineering construction, and 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 is huge. The traditional manual excavation method or drilling and blasting method can no longer meet the growing needs of underground engineering construction. Mechanized operation has become the main construction method. At present, tunnel support structures mainly include segment support, concrete support, and steel arch support. The former two have developed and applied corresponding mechanized equipment in engineering, such as segment assembly machines and concrete pump trucks, but the existing steel arches are mostly connected by flanges and sleeves. Although there are robots for steel arch clamping, a large number of workers are still needed on site to complete the welding and fixing process of the steel arch connection, which has the problems of high labor intensity and low construction efficiency. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a telescopic steel arch frame for a tunnel and an arch frame installation trolley device, and the specific technical scheme is as follows:

[0004] A telescopic steel arch frame for a tunnel, the telescopic steel arch frame is a centrally symmetrical structure, comprising an outermost plane, a middle layer plane, and an innermost plane which are parallel to each other and coaxially arranged; the outermost plane comprises four arc-shaped steel arch segments and four composite ball hinges, each arc-shaped steel arch segment comprises a small-diameter arc-shaped steel pipe and a large-diameter arc-shaped steel pipe, one end of the small-diameter arc-shaped steel pipe is sleeved inside the large-diameter arc-shaped steel pipe, and the small-diameter arc-shaped steel pipe can be extended or retracted along the inside of the large-diameter arc-shaped steel pipe 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 in a rolling connection manner, and the four arc-shaped 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 pipe and a small-diameter cylindrical steel pipe, wherein one end of the small-diameter cylindrical steel pipe is sleeved inside the large-diameter cylindrical steel pipe, and the small-diameter cylindrical steel pipe can extend or retract along the inside of the large-diameter cylindrical steel pipe 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 manner, and 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 through four connecting steel arch sections; each connecting steel arch section includes two sections of mutually nested cylindrical steel pipes with different calibers; 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 through four connecting steel arch sections, and each connecting steel arch section includes two sections of mutually nested cylindrical steel pipes with different calibers;

[0008] The two arc-shaped steel arch sections spaced apart from each other on the innermost plane and the outermost plane are both provided with clamping joints.

[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 frame and stretch it into a tunnel steel arch frame supporting 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 arranged in the U-shaped columns; the wheels are placed at the bottom of the support frame, and the motor installed on the wheels drives the support platform to move forward and backward;

[0014] The first platform is a Japanese-shaped frame, wherein the outer frame is formed by connecting the cross beam and the longitudinal beam end to end, and the middle beam is connected to the upper cross beam of the support frame through the first hydraulic cylinder; the 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 cross beam; the oblique slide groove 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 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 mechanical 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 mechanical arm through the connecting block; the second slider slides in the radial slide groove or the oblique slide groove; the end of the mechanical 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 symmetrically arranged along the longitudinal axis of the platform.

[0018] Furthermore, the radial slide groove is formed by two flat plates placed parallel to each other and fixedly connected to the longitudinal beam of the platform, and a space gap is arranged 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 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 a telescopic steel arch frame and an arch frame mounting trolley device installed together in an embodiment of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the 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 schematic diagram of the first platform in an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the structure 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, cross beam 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, mechanical arm 2-5, clamping head 2-6, telescopic steel arch frame 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 according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become more clear. 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 used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1 As shown, a telescopic steel arch installation trolley device 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 the stability of the telescopic steel arch 3 during transportation, and 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.

[0030] like Figure 2As shown, the telescopic steel arch frame 3 is a centrally symmetrical structure, including: an outermost plane, an intermediate plane, and an innermost plane, and these three planes are parallel to each other and arranged coaxially. The outermost plane includes four arc-shaped steel arch segments and four composite ball hinges 3-4, each of which includes two arc-shaped steel pipes with different calibers, wherein the small-caliber arc-shaped steel pipe 3-1 is sleeved inside the large-caliber arc-shaped steel pipe 3-2, and the small-caliber arc-shaped steel pipe 3-1 can extend or retract along the inside of the large-caliber arc-shaped steel pipe 3-2 under the action of external load. The two ends of each arc-shaped steel arch segment are respectively connected to the two composite ball hinges 3-4 in a rolling connection, and the four 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, that is, it also includes four steel arch segments and four composite ball hinges 3-4, and each steel arch segment also includes two arc-shaped steel pipes with different calibers that are nested with each other, and the four steel arch segments and the four composite ball hinges 3-4 form a closed circle. The middle layer plane includes four cylindrical steel arch sections and four composite ball hinges 3-4, each cylindrical steel arch section includes two cylindrical steel pipes of different diameters, wherein 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 external load. The two ends of each cylindrical steel arch section are respectively connected to the 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.

[0031] The four composite ball hinges 3-4 located on the outermost plane correspond to the four composite ball hinges 3-4 located on the middle plane in a one-to-one manner, and are connected by rolling through four connecting steel arch sections, each of which contains two sections of cylindrical steel pipes with different diameters that are nested in each other; the four composite ball hinges 3-4 located on the middle plane also correspond to the four composite ball hinges 3-4 located on the innermost plane in a one-to-one manner, and are connected by rolling through four connecting steel arch sections, each of which contains two sections of cylindrical steel pipes with different diameters that are nested in each other. In summary, the telescopic steel arch frame 3 includes a total of twenty steel arch sections and twelve composite ball hinges 3-4.

[0032] like Figure 3 As shown, the arch frame installation trolley device is mainly used for clamping, supporting, transporting and extending the telescopic steel arch frame, and includes: a support 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 steel arch frame during transportation, and the clamping mechanism 2 is used to clamp the telescopic steel arch frame 3 and extend it into a tunnel steel arch frame 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 through 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 through 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 sides of the support frame 1-1 are U-shaped columns, and vertical slide grooves 1-10 are arranged in the U-shaped columns. The wheels 1-6 are arranged at the bottom of the support frame 1-1, and the motor 1-7 installed on the wheels 1-6 drives 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, wherein the outer frame is formed by connecting the cross beam 1-21 and the longitudinal beam 1-22 end to end, and the middle beam 1-23 is connected to the upper cross beam of the support frame 1-1 through the first hydraulic cylinder 1-4. The 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. The first platform 1-2 is installed with a radial slide groove 1-25 and an oblique slide groove 1-26. The radial slide groove 1-25 is fixedly connected to the longitudinal beam 1-22 of the platform by two plates placed parallel to each other, and a certain space gap is set between the two plates; the oblique slide groove 1-26 is composed of a pair of slide grooves arranged symmetrically along the longitudinal axis of the platform, and the symmetrically arranged slide grooves are at a certain angle to the longitudinal beam 1-22 of the platform. It should be noted that by adjusting the angle, different extension ratios of the telescopic steel arch frame 3 can be achieved. The structure of the second platform 1-3 is the same as 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 groove 1-25 or the oblique slide groove 1-26, a first support block 2-2 is installed on the top of the second slider 2-1, and a second support block 2-3 is installed on the bottom to ensure the stable support of the second slider 2-1 in the radial slide groove 1-25 or the oblique slide groove 1-26. A mechanical 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 mechanical 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 frame 3, and the clamping joint 3-3 is a square, in which the central area of ​​the square is dug out by a cylinder with a certain height to a certain depth to form a blind hole. It should be noted that a complete telescopic steel arch installation trolley has a total of 8 such clamping mechanisms 2, of which 2 are in the radial slot 1-25 of the first platform 1-2, 2 are in the oblique slot 1-26 of the first platform 1-2, 2 are in the radial slot 1-25 of the second platform 1-3, and 2 are in the oblique slot 1-26 of the second platform 1-3; all the 2 clamping mechanisms 2 in the same radial slot 1-25 or oblique slot 1-26 are symmetrically arranged along the longitudinal axis of the platform. This also means that a total of 8 special clamping joints 3-3 at corresponding positions are prefabricated on the telescopic steel arch 3.

[0036] The tunnel support operation process using the telescopic steel arch frame and the arch frame 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 groove 1-25 and the oblique slide groove 1-26, and 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 can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention shall be included in the protection scope 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 through four connecting steel arch sections; each connecting steel arch section comprises two sections of cylindrical steel pipes with different calibers that are nested in each other; the four composite ball hinges (3-4) located on the middle plane correspond one-to-one with the four composite ball hinges (3-4) located on the innermost plane, and are connected in a rolling manner through four connecting steel arch sections; each connecting steel arch section comprises two sections of cylindrical steel pipes with different calibers that are nested in each other; The two arc-shaped steel arch sections spaced apart from each other on the innermost plane and the outermost plane are both equipped with clamping joints (3-3).

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 frame (3) and stretch it into a tunnel steel arch frame supporting 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 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 arranged 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 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 with 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) and 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 is 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 are located in the oblique slide groove (1-26) of the first platform (1-2), two are located in the radial slide groove (1-25) of the second platform (1-3), and two are located 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 is characterized in that: The radial slide groove (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, and a space gap is provided between the two flat plates.

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