Foldable and telescopic widened section trolley

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a foldable and telescopic widened section trolley which comprises a formwork assembly, a portal frame assembly and a bracket assembly. The portal frame assembly comprises a telescopic portal frame cross beam assembly, a portal frame longitudinal beam connected with the telescopic portal frame cross beam assembly and an additional beam arranged on the portal frame longitudinal beam; the bracket assembly is arranged on the portal frame assembly and is connected with the telescopic portal frame cross beam assembly and the additional beam; the telescopic portal cross beam assembly is connected with the formwork assembly, a telescopic mechanism is arranged between the portal longitudinal beam and the formwork assembly, and a folding mechanism is arranged between the bracket assembly and the formwork assembly. According to the foldable and telescopic trolley with the widened section, the formwork is retracted and folded through the telescopic portal beam assembly, the folding mechanism and the telescopic mechanism and then enters a main hole, the formwork is unfolded at the position of the widened section for lining, the deformation risk of an arch frame is avoided, repeated disassembly and assembly are avoided, the labor intensity is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a foldable and telescopic widened section trolley. Background Art

[0002] In the construction of the secondary lining of a highway tunnel, in addition to the main tunnel section, there is also an emergency escape strip section (i.e., a widened section) that is widened on one side of the main tunnel section. There is usually a escape strip section every 500 meters in a highway tunnel. There are two existing secondary lining construction methods. The first is to skip the main tunnel section. After all the main tunnel sections are constructed by the main tunnel secondary lining trolley, templates are added to the templates of the main tunnel secondary lining trolley, and then all the escape strip sections are lined by skipping. Since the size of the main tunnel section is smaller than that of the escape strip section, when the escape strip section is lined by skipping, it is necessary to remove the added template before it can pass through the main tunnel section. If the number of escape strip sections is too large, it needs to be disassembled and assembled repeatedly, which greatly increases the labor intensity and construction period. At the same time, the escape strip section is skipped and no lining is carried out, and the arch frame There will be a risk of deformation; the second is to separately make a shelter strip section trolley, which is specially used for lining the shelter strip section construction. After the main tunnel trolley has lined a section of the main tunnel section, the shelter strip trolley is assembled in the tunnel to line the adjacent shelter strip section (already lined with the main tunnel). Since the cross-section size of the main tunnel is smaller than the cross-section size of the shelter strip, the shelter strip trolley needs to be disassembled after each lining, and the cycle is repeated until the main tunnel and the shelter strip are lined. Although this method avoids the risk of arch deformation, the shelter strip trolley needs to be disassembled repeatedly, which increases labor intensity and labor costs.

[0003] In summary, there is an urgent need to provide a foldable and telescopic widened section trolley, which can avoid the risk of arch deformation and repeated disassembly, so as to reduce labor intensity and improve construction efficiency. Utility Model Content

[0004] The utility model aims to provide a foldable and telescopic widened section trolley, and the specific technical scheme is as follows:

[0005] A foldable and telescopic widened section trolley comprises a template assembly, a door frame assembly and a bracket assembly arranged between the template assembly and the door frame assembly;

[0006] The portal frame assembly includes a telescopic portal frame crossbeam assembly, a portal frame longitudinal beam connected to the telescopic portal frame crossbeam assembly, and an additional beam arranged on the portal frame longitudinal beam; the bracket assembly is arranged on the portal frame assembly and connected to the telescopic portal frame crossbeam assembly and the additional beam; the telescopic portal frame crossbeam assembly is connected to the template assembly, a telescopic mechanism is arranged between the portal frame longitudinal beam and the template assembly, and a folding mechanism is arranged between the bracket assembly and the template assembly.

[0007] Furthermore, the bracket assembly includes two groups of bracket bodies arranged on the left and right sides of the trolley, each group of the bracket bodies includes more than two bracket monomers, and the corresponding bracket monomers on the left and right are detachably connected with an intermediate connecting structure;

[0008] The bracket monomer includes a bracket crossbeam and a vertical support structure arranged on the bracket crossbeam, and the vertical support structure includes a cross brace, a vertical support 1 arranged on the cross brace, and a truss sheet; a box beam 1 is connected below the cross brace, and the box beam 1 is longitudinally arranged and connected to the bracket crossbeam and the telescopic gantry crossbeam assembly;

[0009] The intermediate connection structure comprises a connection block, the upper two ends of the connection block are connected to the left and right groups of cross braces, and the lower two ends of the connection block are connected to the left and right groups of bracket beams; a second vertical support is arranged above the connection block.

[0010] Furthermore, the truss piece can be foldably arranged on the cross brace.

[0011] Furthermore, a second box beam is connected below the cross brace, and a support is arranged between the second box beam and the bracket cross beam; the additional beam passes through the left and right supports and is fixed on the portal longitudinal beam.

[0012] Furthermore, the telescopic gantry beam assembly includes a fixed gantry beam and a gantry beam telescopic beam telescopically arranged inside the gantry beam, and a slider structure is provided between the gantry beams.

[0013] Furthermore, the telescopic mechanism includes at least one set of adjusting cylinder assemblies, and the adjusting cylinder assembly includes a telescopic cylinder and a cylinder pull rod arranged in series; the cylinder pull rod is adjustably connected to the portal longitudinal beam, and the telescopic cylinder is detachably connected to the template assembly.

[0014] Furthermore, the telescopic mechanism includes at least one group of adjusting cylinder assemblies, and the adjusting cylinder assemblies include two groups of telescopic cylinders arranged in series; one group of telescopic cylinders is connected to the portal longitudinal beam, and the other group of telescopic cylinders is detachably connected to the template assembly.

[0015] Furthermore, the template assembly includes a left side mold, a lower left top mold, a left top mold, a right top mold, a lower right top mold and a right side mold which are movably connected in sequence.

[0016] Furthermore, the folding mechanism includes at least one set of folding cylinders connecting the left top mold and the right top mold.

[0017] Furthermore, a pulley structure is provided at the bottom of the left mold and / or the right mold.

[0018] The application of the technical solution of the utility model has the following beneficial effects:

[0019] (1) The utility model provides a foldable and telescopic widened section trolley, comprising a template assembly, a portal assembly and a bracket assembly arranged between the template assembly and the portal assembly; the portal assembly comprises a telescopic portal beam assembly, a portal longitudinal beam connected to the telescopic portal beam assembly and an additional beam arranged on the portal longitudinal beam; the bracket assembly is arranged on the portal assembly and connected to the telescopic portal beam assembly and the additional beam; the telescopic portal beam assembly is connected to the template assembly, a telescopic mechanism is arranged between the portal longitudinal beam and the template assembly, and a folding mechanism is arranged between the bracket assembly and the template assembly. The foldable and telescopic widened section trolley provided by the utility model can be assembled outside the hole, and the template can be retracted and folded by the telescopic portal beam assembly, the folding mechanism and the telescopic mechanism to enter the main hole, and the template can be unfolded at the widened section for lining. In particular, the unique portal assembly (the portal assembly includes a telescopic portal beam assembly, a portal longitudinal beam and an additional beam arranged on the portal longitudinal beam), the telescopic mechanism arranged at a unique position (a telescopic mechanism is arranged between the portal longitudinal beam and the template assembly), the folding mechanism, the template assembly and the bracket assembly are adopted in combination, which can not only realize the rapid disassembly and assembly of the trolley, but also ensure the stability of the trolley during the deformation process, reduce labor intensity and improve construction efficiency.

[0020] (2) In the present invention, the telescopic mechanism connects the portal longitudinal beam and the formwork assembly, and the left and right movement of the formwork assembly is achieved through the telescopic mechanism. During the movement of the formwork assembly, the positions of the portal longitudinal beam and the portal column remain unchanged, that is, during the deformation of the foldable and telescopic widened section trolley, there is no need to move the track, thereby ensuring that the construction vehicles in the tunnel are not affected.

[0021] (3) In the present invention, the bracket assembly includes two groups of bracket bodies arranged on the left and right sides of the trolley, each group of the bracket bodies includes more than two bracket monomers, and the corresponding bracket monomers on the left and right are detachably connected with an intermediate connection structure; the bracket monomer includes a bracket crossbeam and a vertical support structure arranged on the bracket crossbeam, and the vertical support structure includes a cross brace, a vertical support 1 arranged on the cross brace, and a truss piece; the intermediate connection structure includes a connecting block, the upper two ends of the connecting block are connected to the left and right groups of cross braces, and the lower two ends of the connecting block are connected to the left and right groups of bracket crossbeams; a vertical support 2 is arranged above the connecting block; and the truss piece is foldably arranged on the cross brace. The bracket assembly structure provided by the present invention only requires the vertical support 1, the vertical support 2, the connecting block, and the truss piece to be folded when the foldable and telescopic widened section trolley is deformed, thereby reducing the difficulty of operation and labor intensity of workers.

[0022] (4) In the present invention, by providing a supporting structure and an additional beam, the supporting effect is strengthened to prevent the telescopic gantry crossbeam assembly from deforming during the deformation of the foldable and telescopic widened section trolley.

[0023] (5) In the utility model, a sliding block structure is provided between the portal crossbeam and the portal crossbeam telescopic beam to ensure that the portal crossbeam telescopic beam can smoothly telescope within the portal crossbeam.

[0024] (6) In the present invention, the telescopic mechanism includes at least one set of adjusting oil cylinder components, and the adjusting oil cylinder components include a telescopic oil cylinder and an oil cylinder tie rod arranged in series; the oil cylinder tie rod is adjustably connected to the longitudinal beam of the door frame, and the telescopic oil cylinder is detachably connected to the template assembly. By providing the oil cylinder tie rod, the telescopic stroke is increased, and the applicability of the foldable and telescopic widened section trolley is improved.

[0025] (7) In the utility model, a pulley structure is provided at the bottom of the left mold and / or the right mold, which can reduce the sliding resistance of the telescopic beam of the portal frame crossbeam.

[0026] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0028] Figure 1 It is a front structural schematic diagram of a foldable and telescopic widened cross-section trolley in an embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Side view of

[0030] Figure 3 yes Figure 1 A top view of

[0031] Figure 4 It is a structural schematic diagram of a telescopic door frame crossbeam assembly in an embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the mold-standing state of the foldable and telescopic widened section trolley in the embodiment of the utility model;

[0033] Figure 6 It is a schematic diagram of the demoulding and retracting state of the foldable and telescopic widened section trolley in the embodiment of the utility model;

[0034] Among them, 1. Formwork assembly, 1.1. Left side formwork, 1.2. Left lower top formwork, 1.3. Left top formwork, 1.4. Right top formwork, 1.5. Right lower top formwork, 1.6. Right side formwork, 2. Gantry assembly, 2.1. Telescopic gantry beam assembly, 2.1.1. Gantry beam, 2.1.2. Gantry beam telescopic beam, 2.1.3. Slider structure, 2.2. Gantry longitudinal beam, 2.3. Additional beam, 2.4. Gantry column, 3. Bracket assembly, 3.1. Middle connecting structure, 3.2. Bracket beam, 3.3. Cross brace, 3.4. Vertical support one, 3.5. Truss piece, 3.6. Box beam one, 3.7. Vertical support two, 3.8. Box beam two, 3.9. Support, 4. Telescopic mechanism, 4.1. Telescopic cylinder, 4.2. Cylinder pull rod, 5. Folding mechanism. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0036] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "front", "back", "lateral", "longitudinal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] Example

[0038] It should be noted that, in this embodiment, the horizontal direction refers to the width direction of the tunnel, and the vertical direction refers to the length direction of the tunnel.

[0039] See also Figure 1 The embodiment of the utility model provides a foldable and telescopic widened section trolley, which includes a template assembly 1, a door frame assembly 2, and a bracket assembly 3 arranged between the template assembly 1 and the door frame assembly 2;

[0040] The template assembly 1 comprises a left side template 1.1, a left lower top template 1.2, a left top template 1.3, a right top template 1.4, a right lower top template 1.5 and a right side template 1.6 which are movably connected in sequence. Preferably, each template is hinged.

[0041] In this embodiment, the gantry assembly 2 includes two longitudinal front and rear telescopic gantry beam assemblies 2.1, two transverse left and right gantry longitudinal beams 2.2 connected to the telescopic gantry beam assemblies 2.1, and two additional beams 2.3 arranged on the gantry longitudinal beams 2.2, and gantry columns 2.4 are vertically arranged below the two ends of the gantry longitudinal beams 2.2 along the length direction, and a walking mechanism is provided at the bottom of the gantry columns 2.4.

[0042] In this embodiment, see Figure 3 and Figure 4 The telescopic gantry beam assembly 2.1 includes a gantry beam 2.1.1 and a gantry beam telescopic beam 2.1.2. The gantry beam 2.1.1 is fixedly connected between the ends of two gantry longitudinal beams 2.2. The gantry beam telescopic beam 2.1.2 is telescopically arranged in the gantry beam 2.1.1. Pin holes are correspondingly arranged on the gantry beam 2.1.1 and the gantry beam telescopic beam 2.1.2 (in this embodiment, two pin holes are arranged). The gantry beam 2.1.1 and the gantry beam telescopic beam 2.1.2 are relatively fixed by a connecting pin shaft passing through the pin hole.

[0043] See also Figure 4 In (a) and (b), in order to ensure that the telescopic beam 2.1.2 of the portal frame crossbeam can be telescoped smoothly in the portal frame crossbeam 2.1.1, a slider structure 2.1.3 is provided between the portal frame crossbeam 2.1.1 and the telescopic beam 2.1.2. In this embodiment, the slider structure 2.1.3 is provided on the upper surface of the inner side of the right end of the portal frame crossbeam 2.1.1 and the upper surface of the left end of the portal frame crossbeam telescopic beam 2.1.2, and the slider structure 2.1.3 is provided on the lower surface of the inner side of the right end of the portal frame crossbeam 2.1.1 and the lower surface of the left end of the portal frame crossbeam telescopic beam 2.1.2.

[0044] As another preferred technical solution, a pulley structure is provided at the bottom of the left side mold 1.1 and / or the right side mold 1.6, so that the side molds can move smoothly when they are contracted, thereby reducing the sliding resistance of the portal crossbeam telescopic beam 2.1.2.

[0045] See also Figure 1-Figure 3The bracket assembly 3 includes two groups of bracket bodies arranged on the left and right sides of the trolley, each group of the bracket bodies includes more than two bracket monomers, and each pair of the corresponding bracket monomers on the left and right are detachably connected with an intermediate connecting structure 3.1; the bracket monomer includes a horizontally arranged bracket beam 3.2 and a vertical supporting structure arranged on the bracket beam 3.2, and the vertical supporting structure is detachably connected to the bracket beam 3.2 and the template assembly 1; the vertical supporting structure includes a horizontal support 3.3, a vertical support 3.4 arranged on the horizontal support 3.3, and a truss piece 3.5, the truss piece 3.5 is hinged to the horizontal support 3.3 through a hinge seat, and the truss piece 3.5 can be folded and laid flat on the horizontal support 3.3; a box beam 3.6 is connected below the horizontal support 3.3, and the box beam 3.6 is longitudinally arranged and connected to the bracket beam 3.2 and the telescopic portal beam assembly 2.1; in this embodiment, refer to Figure 1 The box beam 3.6 of the left bracket monomer connects the left bracket cross beam 3.2 and the portal frame cross beam 2.1.1, and the box beam 3.6 of the right bracket monomer connects the right bracket cross beam 3.2 and the portal frame cross beam telescopic beam 2.1.2.

[0046] The intermediate connection structure 3.1 includes a connection block, which is I-shaped, and its upper two ends are respectively connected to the left cross brace 3.3 and the right cross brace 3.3, and the lower two ends of the connection block are respectively connected to the left bracket beam 3.2 and the right bracket beam 3.2; a vertical support 2 3.7 is arranged above the connection block.

[0047] See also Figure 1-Figure 3 A box beam 2 3.8 is also connected below the cross brace 3.3, and a support 3.9 is provided between the box beam 2 3.8 and the bracket cross beam 3.2; the additional beam 2.3 passes through the supports 3.9 on the left and right sides and is fixed on the portal longitudinal beam 2.2.

[0048] In this embodiment, see Figure 1 and Figure 3A telescopic mechanism 4 is provided between the right side portal longitudinal beam 2.2 and the template assembly 1, the portal crossbeam telescopic beam 2.1.2 is connected to the right lower top mold 1.5, and a telescopic mechanism 4 is provided between the right side portal longitudinal beam 2.2 and the right lower top mold 1.5, and the telescopic mechanism 4 is used to drive the right lower top mold 1.5 to move left and right. The telescopic mechanism 4 includes at least one group of adjusting cylinder assemblies, and the adjusting cylinder assembly includes a telescopic cylinder 4.1 and a cylinder tie rod 4.2 arranged in series; the cylinder tie rod 4.2 is adjustably connected to the portal longitudinal beam 2.2 (in this embodiment, the cylinder tie rod 4.2 is provided with 3 pin holes, and the cylinder tie rod 4.2 is fixed to the ear plate arranged on the portal longitudinal beam 2.2 through a pin shaft), and the telescopic cylinder 4.1 is detachably connected to the template assembly 1; as another preferred technical solution, the adjusting cylinder assembly includes two groups of telescopic cylinders 4.1 arranged in series; one group of telescopic cylinders 4.1 is connected to the portal longitudinal beam 2.2, and the other group of telescopic cylinders 4.1 is detachably connected to the template assembly 1. This embodiment adopts the telescopic cylinder 4.1 and cylinder tie rod 4.2 structure.

[0049] A folding mechanism 5 is also provided between the bracket assembly 3 and the template assembly 1, and the folding mechanism 5 includes at least one set of folding cylinders connected to the left top mold 1.3 and / or the right top mold 1.4. In this embodiment, the folding mechanism 5 includes a folding cylinder connected to the left top mold 1.3 and a folding cylinder connected to the right top mold 1.4.

[0050] The foldable and retractable widened section trolley provided in this embodiment needs to be operated as follows when entering the main hole:

[0051] (1) Remove the left and right vertical supports 1 3.4, the middle vertical support 2 3.7 and the middle connecting structure 3.1. At this time, the bracket assembly 3 is disconnected from the middle. The left bracket body and the right bracket body are protected from overturning by the support 3.9 and the additional beam 2.3;

[0052] (2) Slowly lay down the truss pieces 3.5 on the left and right sides through the hinge seats;

[0053] (3) Control the contraction of the left top mold 1.3 and the right top mold 1.4 by means of a folding oil cylinder;

[0054] (4) The telescopic cylinder 4.1 is extended and retracted three times to realize the leftward movement of the right template. At the same time, the telescopic beam 2.1.2 of the portal frame is retracted into the portal frame beam 2.1.1, and the box beam 3.6 of the right bracket body connected to the telescopic beam 2.1.2 of the portal frame moves to the left until the left and right side cross braces 3.3 and the left and right side bracket beams 3.2 are respectively in contact and connected, and the retraction of the trolley is completed.

[0055] For details on the three extensions of the telescopic cylinder 4.1, see Figure 3and Figure 6 , 3 sets of telescopic cylinders 4.1 are arranged on the right side of the trolley, the right side of the telescopic cylinder 4.1 is fixed to the right lower top mold 1.5 through a pin shaft, and the left side of the cylinder tie rod 4.2 connected to the telescopic cylinder 4.1 is fixed to the ear plate seat arranged on the portal longitudinal beam 2.2 through a pin shaft, and the cylinder tie rod 4.2 is designed with 3 pin holes, which correspond to the three states in the demoulding process, such as Figure 6 As shown; after the lining of the car-avoidance strip section (i.e. the tunnel widening section) is completed, the trolley needs to pass through the main tunnel section to transfer to the next car-avoidance strip section. Due to the limited length of the telescopic cylinder 4.1, the cylinder stroke is limited, resulting in the template not being able to be retracted into place at one time, and it needs to be retracted in three times.

[0056] Control the telescopic cylinder 4.1 to fully retract. While the telescopic cylinder 4.1 is retracted, it drives the right template to retract to the left. Then remove the pin between the cylinder tie rod 4.2 and the ear plate seat of the portal longitudinal beam 2.2, and then control the telescopic cylinder 4.1 to extend. Since the right end of the telescopic cylinder 4.1 is fixed at this time, controlling the telescopic cylinder 4.1 to extend at this time is equivalent to controlling the cylinder tie rod 4.2 to move to the left, until the second (from left to right) pin hole position on the cylinder tie rod 4.2 is aligned with the hole position at the ear plate seat of the portal longitudinal beam 2.2, install the pin between the cylinder tie rod 4.2 and the ear plate seat of the portal longitudinal beam 2.2, and then control the telescopic cylinder 4.1 to fully retract. Repeat the above operation until the third (from left to right) pin hole position on the cylinder tie rod 4.2 is aligned with the hole position at the ear plate seat of the portal longitudinal beam 2.2, install the pin between the cylinder tie rod 4.2 and the ear plate seat of the portal longitudinal beam 2.2, and finally control the telescopic cylinder 4.1 to retract in place, see Figure 6 At this time, the outline of the trolley has been reduced and can pass smoothly in the main tunnel.

[0057] The foldable and telescopic widened section trolley provided by the utility model can be assembled outside the tunnel. The template is retracted and folded through the telescopic door frame crossbeam assembly, the folding mechanism and the telescopic mechanism and then enters the main tunnel. The template is unfolded at the widened section for lining, which avoids the risk of arch deformation and repeated disassembly and assembly, reduces labor intensity and improves construction efficiency.

[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A foldable and telescopic widened section trolley, characterized in that: It comprises a template assembly (1), a door frame assembly (2), and a bracket assembly (3) arranged between the template assembly (1) and the door frame assembly (2); The portal frame assembly (2) comprises a telescopic portal frame crossbeam assembly (2.1), a portal frame longitudinal beam (2.2) connected to the telescopic portal frame crossbeam assembly (2.1), and an additional beam (2.3) arranged on the portal frame longitudinal beam (2.2); the bracket assembly (3) is arranged on the portal frame assembly (2) and connected to the telescopic portal frame crossbeam assembly (2.1) and the additional beam (2.3); the telescopic portal frame crossbeam assembly (2.1) is connected to the template assembly (1), a telescopic mechanism (4) is arranged between the portal frame longitudinal beam (2.2) and the template assembly (1), and a folding mechanism (5) is arranged between the bracket assembly (3) and the template assembly (1).

2. The foldable and telescopic widened section trolley according to claim 1, characterized in that: The bracket assembly (3) comprises two groups of bracket bodies arranged on the left and right sides of the trolley, each group of the bracket bodies comprises more than two bracket monomers, and the corresponding bracket monomers on the left and right are detachably connected with an intermediate connection structure (3.1); The bracket monomer comprises a bracket crossbeam (3.2) and a vertical support structure arranged on the bracket crossbeam (3.2), wherein the vertical support structure comprises a crossbeam (3.3), a vertical support 1 (3.4) arranged on the crossbeam (3.3), and a truss plate (3.5); a box beam 1 (3.6) is connected below the crossbeam (3.3), and the box beam 1 (3.6) is arranged longitudinally and connected to the bracket crossbeam (3.2) and the telescopic portal crossbeam assembly (2.1); The intermediate connection structure (3.1) comprises a connection block, the upper two ends of the connection block are connected to the left and right groups of cross braces (3.3), and the lower two ends of the connection block are connected to the left and right groups of bracket cross beams (3.2); a second vertical support (3.7) is arranged above the connection block.

3. The foldable and telescopic widened section trolley according to claim 2, characterized in that: The truss piece (3.5) is foldably arranged on the cross brace (3.3).

4. The foldable and telescopic widened section trolley according to claim 2, characterized in that: A second box beam (3.8) is also connected below the cross brace (3.3), and a support (3.9) is arranged between the second box beam (3.8) and the bracket cross beam (3.2); the additional beam (2.3) passes through the two left and right supports (3.9) and is fixed on the portal longitudinal beam (2.2).

5. The foldable and telescopic widened section trolley according to claim 1, characterized in that: The telescopic portal crossbeam assembly (2.1) comprises a fixed portal crossbeam (2.1.1) and a portal crossbeam telescopic beam (2.1.2) telescopically arranged in the portal crossbeam (2.1.1), and a sliding block structure (2.1.3) is provided between the portal crossbeam (2.1.1) and the portal crossbeam telescopic beam (2.1.2).

6. The foldable and telescopic widened section trolley according to claim 1, characterized in that: The telescopic mechanism (4) comprises at least one set of adjusting cylinder assemblies, wherein the adjusting cylinder assembly comprises a telescopic cylinder (4.1) and a cylinder pull rod (4.2) arranged in series; the cylinder pull rod (4.2) is adjustably connected to the portal longitudinal beam (2.2), and the telescopic cylinder (4.1) is detachably connected to the template assembly (1).

7. The foldable and telescopic widened section trolley according to claim 1, characterized in that: The telescopic mechanism (4) comprises at least one group of adjusting cylinder assemblies, wherein the adjusting cylinder assemblies comprise two groups of telescopic cylinders (4.1) arranged in series; one group of telescopic cylinders (4.1) is connected to the portal longitudinal beam (2.2), and the other group of telescopic cylinders (4.1) is detachably connected to the template assembly (1).

8. The foldable and telescopic widened section trolley according to any one of claims 1 to 7, characterized in that: The template assembly (1) comprises a left side mold (1.1), a left lower top mold (1.2), a left top mold (1.3), a right top mold (1.4), a right lower top mold (1.5) and a right side mold (1.6) which are movably connected in sequence.

9. The foldable and telescopic widened section trolley according to claim 8, characterized in that: The folding mechanism (5) comprises at least one set of folding cylinders connecting the left top mold (1.3) and the right top mold (1.4).

10. The foldable and telescopic widened section trolley according to claim 8, characterized in that: A pulley structure is provided at the bottom of the left mold (1.1) and / or the right mold (1.6).

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