A trolley for pouring tunnel center ditch cover plate

Abstract

The present application relates to a kind of trolley for tunnel center ditch cover plate pouring, including frame, pair of slide, pedestal respectively with each slide corresponding matching and platform plate corresponding with each pedestal matching.The lower part of frame is equipped with wheel, can drive trolley movement.Pair of slide is distributed and is equipped in the left and right sides of frame, can respectively relative frame along left and right direction reciprocating movement.Pedestal is fixedly installed in the upper portion of slide, can reciprocating movement relative slide along vertical direction.Platform plate includes inner side platform plate and outer side platform plate, and the inner, outer side platform plate is oppositely arranged on the top surface of pedestal.Left and right relative movement of inner, outer side platform plate can be respectively relative pedestal along left and right direction, so that the two inner side platform plates set on the pedestal of pair of slide can be mutually close and far away.The present application can be applicable to different width specifications ditch, can be adjusted according to the width size of ditch, can quickly realize the circulation pouring of ditch cover plate, help to improve the production efficiency of tunnel ditch cover plate pouring.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and in particular to a casting trolley capable of being used for cast-in-situ construction of a tunnel center ditch cover. Background Art

[0002] The drainage ditch within the tunnel serves to guide and drain water. Ditch construction methods include cast-in-place and prefabricated installation. The cast-in-place method, used for the bottom and sidewalls of central drainage ditches, is a relatively mature process. Drainage ditch cover construction requires setting up a scaffold within the ditch for pouring, which is then removed after the cover solidifies. However, due to the relatively narrow space within the central ditch, workers entering the ditch to install and remove the scaffolds are not only difficult but also time-consuming, placing a high level of labor intensity on the workers. Furthermore, the width of the central ditch varies, requiring the trusses used to set up scaffolds within the ditch to be configured in different lengths. This necessitates preparing trusses of multiple lengths, resulting in a relatively low replacement and utilization rate for the trusses. The large number of accessories makes storage and transportation time-consuming and labor-intensive, increasing manufacturing, storage, and transportation costs. Summary of the Invention

[0003] In order to address the problem that in the past process of pouring ditch covers, the efficiency of cover pouring was relatively low due to the need to repeatedly set up and dismantle supports in the ditch. The present invention provides a trolley for pouring tunnel center ditch covers. The pouring trolley can be placed in ditches of different widths and can be adjusted to a working state suitable for the ditch according to the size parameters of the ditch. It can quickly realize the cyclic pouring of ditch covers, which helps to improve the production efficiency of tunnel ditch cover pouring. At the same time, the pouring production no longer relies on workers entering the ditch to carry out assembly and disassembly, which can reduce the labor intensity of workers and improve working conditions.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a trolley for pouring tunnel center ditch covers, comprising a frame, a pair of slides, a pedestal corresponding to each slide, and a platform corresponding to each pedestal. The lower portion of the frame is provided with wheels capable of driving the trolley to move.

[0005] The paired slides are distributed on the left and right sides of the frame and can respectively move back and forth in the left and right directions relative to the frame.

[0006] The pedestal is fixedly mounted on the upper portion of the slide and can move back and forth in a vertical direction relative to the slide.

[0007] The platform includes an inner platform and an outer platform, the inner platform and the outer platform being disposed opposite each other on the top surface of the base. The outer platform and the inner platform can respectively reciprocate in the left-right direction relative to the base, so that the two inner platforms disposed on the bases of the paired slides can move closer to or further away from each other.

[0008] Furthermore, a connecting base is mounted below the slide, capable of reciprocating in sync with the slide. Support legs are mounted on the connecting base, capable of vertically ascending and descending. The lower end surfaces of the support legs extend downwardly and relative to the exterior of the vehicle frame, contacting the inner bottom surface of the gutter during descent to provide support.

[0009] The connecting seat is provided with a track extending in the left and right directions, and correspondingly, the frame is provided with a slide groove corresponding to the track. After the track and the slide groove are matched, the connecting seat can slide smoothly relative to the frame in the horizontal plane. A hydraulic cylinder is fixedly arranged in the connecting seat. The upper end of the support leg is connected to the free end of the cylinder rod of the hydraulic cylinder, so that as the cylinder rod of the hydraulic cylinder is extended and retracted, the support leg can be raised and lowered in the vertical direction. When the trolley needs to move along the ditch of the central tunnel, each support leg is synchronously retracted upward and separated from the inner bottom surface of the ditch, forming a certain vertical spacing. Conversely, when the trolley moves to the appropriate position, each support leg is synchronously moved downward and contacts the inner bottom surface of the ditch, thereby supporting the slide and the pedestal in the ditch.

[0010] To ensure the trolley can fit in narrow ditches, the left and right widths of the frame are generally minimized. At the same time, to ensure the platform can fully cover the upper end of the ditch, the slide is required to have a large outward travel. According to the above solution, by providing selectively raiseable legs on the connecting base to support the outwardly extending slide, the entire lower portion of the platform is provided with stable and reliable support without affecting the movement of the trolley.

[0011] Furthermore, a strip hole extending in the front-to-back direction is provided at the free end of the inner platform; side ears extending downward are provided on the front and rear end surfaces of the free end of the inner platform respectively; a roller is provided between the two side ears, and felt or mesh is wound around the roller;

[0012] At the free end of the outer platform, two side ears are provided on the front and rear end surfaces respectively;

[0013] The free end of the felt or mesh passes upward through the strip-shaped hole and covers the upper end surface of the table; the free end of the felt or mesh is fixed to the second side ear;

[0014] The shaft end of the rotating roller is sleeved with a torsion spring which can make the rotating roller rotate in the opposite direction to wind the felt or mesh cloth onto the roller surface.

[0015] As the outer platen and the inner platen move away from each other, the felt or mesh can be pulled off from the roller surface; conversely, as the outer platen and the inner platen move toward each other, the felt or mesh can be wound around the roller surface as the roller rotates in the opposite direction.

[0016] Furthermore, a strip-shaped hole a extending in the front-to-back direction is provided at the free end of the inner platform; side ears 1 extending downward are provided on the front and rear end surfaces of the free end of the inner platform; a roller a is provided between the two side ears 1, and felt or mesh is wound around the roller a;

[0017] A strip-shaped hole b extending in the front-to-back direction is provided at the free end of the outer platform; two side ears extending downward are provided on the front and rear end surfaces of the free end of the outer platform; a rotating roller b is provided between the two side ears;

[0018] The free end of the felt or mesh passes upward through the strip hole a, passes through the upper end surface of the platen, and then passes downward through the strip hole b to be fixed on the rotating roller b;

[0019] At least the shaft end of the roller a or the roller b is sleeved with a torsion spring to enable the corresponding roller to rotate in the opposite direction to wind the felt or mesh cloth onto the roller surface.

[0020] As the outer and inner plates move away from each other, the ends of the felt or mesh can be simultaneously pulled free from both roller surfaces. When the rollers are positioned on one side, the resistance to pulling the felt or mesh is reduced. Conversely, as the outer and inner plates move toward each other, the felt or mesh can be wound around the roller surfaces as the rollers rotate in opposite directions. When both rollers are equipped with torsion springs to provide reversal capabilities, the retraction of the felt or mesh can be smoother and faster than when only one roller has a torsion spring. This helps prevent wrinkles from forming on the felt or mesh due to a relatively slow retraction speed, or even the mesh becoming stuck between the opposing end surfaces of the outer and inner plates. When both rollers are equipped with torsion springs, the reversal of the two rollers ensures that the felt or mesh is fully taut.

[0021] Furthermore, the upper part of the frame is provided with a rail groove extending in the left and right directions. Correspondingly, the free ends of the inner platform plates provided on the upper parts of the paired slides are formed with linear rail structures corresponding to the rail grooves; during the reciprocating sliding process of the inner platform plates, their free ends can always maintain a matching relationship with the rail grooves.

[0022] Furthermore, a first clamping rail is provided on the lower end surface of the inner platform, and a second clamping rail is provided on the lower end surface of the outer platform; correspondingly, a first groove rail and a second groove rail are provided on the upper end surface of the base, which correspond to the first clamping rail and the second clamping rail respectively;

[0023] A strip groove extending in the left-right direction is provided at the bottom of the first groove rail and the bottom of the second groove rail; a convex column is provided on the first clamping rail and a convex column is provided on the second clamping rail; the convex column and the convex column extend downward and pass through the corresponding strip groove;

[0024] The end of the first boss is connected to a first L-shaped tie rod, and the end of the second boss is connected to a second L-shaped tie rod. The other end of the first tie rod is connected to the hydraulic cylinder rod fixed to the vehicle frame, and the other end of the second tie rod is connected to the hydraulic cylinder rod fixed to the vehicle frame. In this way, the extension and retraction of the hydraulic cylinder rod can drive the inner platform relative to the first groove rail and the outer platform relative to the second groove rail to reciprocate in the left and right directions.

[0025] Furthermore, a groove extending in the left-right direction is provided on the upper end surface of the inner table plate on the side close to the outer table plate; correspondingly, an insertion rod corresponding to the groove is provided on the end surface of the outer table plate facing the inner table plate; the upper end surface of the insertion rod, the upper end surface of the outer table plate and the upper end surface of the inner table plate are in the same plane.

[0026] This design ensures that the upper end surfaces of the inner and outer platens maintain a continuous, flat support surface during their reciprocating movement. In particular, when provided with felt (or mesh), this shields the entire upper end surface of the base, particularly where the inner and outer platens meet, preventing grit and other debris from entering the grooves, rails, and other mating surfaces, potentially affecting transmission.

[0027] Furthermore, a channel extending in the left-right direction is provided on the end surface of the inner table plate facing the outer table plate; correspondingly, an insert plate corresponding to the channel is provided on the end surface of the outer table plate facing the inner table plate; the upper end surface of the outer table plate and the upper end surface of the inner table plate are in the same plane.

[0028] Although the insert plate can block the matching surfaces such as the groove rail under such a design scheme, a recessed area will appear at the junction of the inner and outer plates during the left and right reciprocating movement of the inner and outer plates, and the upper end surface of the plate cannot always maintain a complete flat support surface. When encountering a situation where the width of the ditch is large, the defects caused by this recessed area will be very obvious.

[0029] The beneficial effects of the present invention are as follows: the trolley for casting the tunnel center ditch cover provided by the present invention can be suitable for ditches of different widths and specifications, can be adjusted to a state suitable for the ditch according to the width of the ditch, and forms a sufficient supporting surface at the upper port of the ditch, which can quickly realize the cyclic casting of the ditch cover, and help to improve the production efficiency of the tunnel ditch cover casting. At the same time, the casting production no longer relies on workers entering the ditch to implement assembly and disassembly, which can reduce the labor intensity of workers and improve working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a specific implementation plan under the transverse section of the ditch.

[0031] Figure 2 It is a structural schematic diagram of a specific implementation plan in the longitudinal section of the ditch.

[0032] Figure 3 This is a schematic structural diagram (top view) of a specific implementation scheme of the table involved in this patent.

[0033] Figure 4 For the Figure 3 Schematic diagram of the assembly structure cross-section between the platform and the base in the middle AA section.

[0034] Figure 5 It is a schematic cross-sectional view of the assembly structure between the table top and the base under another embodiment.

[0035] Figure 6 This is a schematic diagram of the mechanism related to the table in a specific embodiment of this patent (top view).

[0036] In the figure: 10 tunnel foundation, 20 ditch sidewall, 30 cover plate supporting surface, 40 tunnel center ditch;

[0037] 1 vehicle frame, 11 pressure plate, 12 wheel, 2 slide, 21 guide rod, 3 first hydraulic cylinder, 4 second hydraulic cylinder, 5 platform, 51 groove rail one, 52 groove rail two, 53 strip groove, 54 flange, 6 platform, 61 inner platform, 611 groove, 611' channel, 612 rail one, 613 boss one, 614 side ear one, 615 strip hole, 62 outer platform, 621 plug rod, 621' plug plate, 622 rail two, 623 boss two, 624 side ear two, 63 roller, 64 felt, 7 first pull rod, 71 third hydraulic cylinder, 8 second pull rod, 81 fourth hydraulic cylinder, 9 connecting seat, 91 support foot. DETAILED DESCRIPTION

[0038] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "front", "back", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0039] like Figures 1 to 2 The trolley shown is used for pouring the ditch cover in the center of the tunnel, and includes a frame 1, a pair of slides 2, a pedestal 5 corresponding to each slide 2, and a table 6 corresponding to each pedestal 5. In specific implementation, the slides 2 can be selected as one pair or multiple pairs. The paired slides 2 are basically symmetrically distributed on the left and right sides of the frame 1, and can move back and forth in the left and right directions relative to the frame 1. A first hydraulic cylinder 3 is fixedly mounted on the frame 1. The first hydraulic cylinder 3 is matched one-to-one with each slide 2. The end of the cylinder rod is connected to the slide 2. As the cylinder rod moves forward and backward, it drives the slide 2 to move back and forth in the left and right directions relative to the frame 1, so that the table 6 can adjust its position according to the width of the ditch, as shown in the figure. Figure 1 The embodiment shown. There are multiple pairs of slides 2 distributed alternately in the depth direction of the ditch, as shown in FIG. Figure 2 The embodiment shown.

[0040] The lower portion of the frame 1 is equipped with wheels 12, which can drive the trolley along the depth of the ditch. The motor and gear transmission box that drive the wheels 12 are fixed to the lower portion of the frame 1. The specific power of the motor and the number of motors and transmission boxes should be selected based on the number of slide pairs configured.

[0041] In order to ensure that the slide 2 can move smoothly when moving to the left or right relative to the frame 1, at least one guide rod 21 is provided in the middle and upper part of the slide 2, and a U-shaped pressure plate 11 is correspondingly provided on the frame 1. The free end of the guide rod 21 passes through and the end passes through the channel formed by the combination of the pressure plate 11 and the frame 1. In addition, in order to facilitate the control of the stroke of the slide 2 moving to the left and right, an external thread is provided on the portion near the free end of the guide rod 21, and a nut is matched on the external thread section. The movement stroke of the slide is constrained by adjusting the position of the nut. Furthermore, a sensor can be provided on the nut. When the left end face or the right end face of the pressure plate 11 contacts the nut, the sensor can be triggered to stop the first hydraulic cylinder 3.

[0042] During use, the position of the nut relative to the free end of the guide rod 21 is set in advance according to the width of the tunnel center ditch 40.

[0043] The base 5 is fixedly mounted on the upper portion of the slide 2 and can move back and forth in the vertical direction relative to the slide 2. Figure 1 As shown, a second hydraulic cylinder 4 is mounted on top of the slide 2. The rod of this second hydraulic cylinder 4 is capable of vertical telescopic movement, with each rod end connected to a corresponding pedestal 5 via a flange. As the rod of the second hydraulic cylinder retracts and retracts, the height of the pedestal 5 is adjusted to align the upper end surface of the platform 6 mounted thereon with the height of the cover plate support surface 30 on the ditch sidewalls 20. The ditch sidewalls 20 are positioned within the ditch foundation 10, forming a tunnel center ditch 40 between the other sidewalls.

[0044] At the same time, a connecting seat 9 is also installed at the lower part of the slide 2, and the connecting seat 9 can reciprocate synchronously with the slide 2. A support leg 91 is provided on the connecting seat 9, and the support leg 91 can move up and down in the vertical direction. The lower end surface of the support leg 91 extends downward relative to the outside of the frame 1, and can contact the inner bottom surface of the ditch when descending to play a supporting role. A disk is provided at the lower end of the support leg 91 to increase the contact area between the support leg and the inner bottom surface of the ditch. A rubber pad (ring) or elastic pad with a small elastic deformation ability can be embedded on the bottom surface of the disk. The lower end surface of the rubber pad (ring) protrudes downward relative to the bottom surface of the disk. When setting the specific protrusion size, the elastic deformation ability should be considered and then determined.

[0045] The connecting seat 9 is provided with a track extending in the left-right direction, and correspondingly, a slide groove matching the track is provided on the vehicle frame 1. After the track and the slide groove match, the connecting seat 9 can slide smoothly horizontally relative to the vehicle frame 1.

[0046] In a specific embodiment, a hydraulic cylinder can be fixedly arranged in the connecting seat 9. The upper end of the support leg 91 is connected to the free end of the cylinder rod of the hydraulic cylinder, so that the support leg can be raised and lowered in the vertical direction as the cylinder rod of the hydraulic cylinder is extended and retracted.

[0047] When the trolley needs to move along the central tunnel ditch, each leg is synchronously retracted upward and separated from the inner bottom surface of the ditch, forming a certain vertical spacing. Conversely, when the trolley moves to the appropriate position, each leg is synchronously moved downward and contacts the inner bottom surface of the ditch, thereby supporting the slide 2, the base 5, and the platform 6 in the central tunnel ditch 40.

[0048] To ensure the trolley can fit in narrow ditches, the left and right widths of the frame are generally minimized. At the same time, to ensure the platform can fully cover the upper end of the ditch, the slide is required to have a large outward travel. According to the above solution, by providing selectively raiseable legs on the connecting base to support the outwardly extending slide, the entire lower portion of the platform is provided with stable and reliable support without affecting the movement of the trolley.

[0049] like Figure 1 、 Figures 3 to 6 As shown, the platform 6 includes an inner platform 61 and an outer platform 62, which are arranged opposite to each other on the top surface of the base 5. The outer platform 62 and the inner platform 61 can respectively reciprocate in the left and right directions relative to the base 5, so that the two inner platforms 61 provided on the base 5 of the pair of slides 2 can move closer to and away from each other, and at the same time, the free end surfaces of the two outer platforms 61 can move closer to and away from the inner wall surface of the ditch side wall 20.

[0050] like Figure 3 、 Figure 4 In the illustrated embodiment, a groove 611 extending in the left-right direction is provided on the upper end surface of the inner platen 61, near the outer platen 62. Correspondingly, an insertion rod 621 is provided on the end surface of the outer platen 62 facing the inner platen 61, matching the groove 611 (at least the upper end of the rod is flat). The upper end surface of the insertion rod 621, the upper end surface of the outer platen 62, and the upper end surface of the inner platen 61 are all in the same plane.

[0051] The above-described design of the platform 6 ensures that the upper end surfaces of the inner and outer platform plates maintain a continuous flat support surface during their left-right reciprocating movement, providing sufficient support for the casting cover plate and preventing the formation of a localized recessed area at the junction of the inner and outer platform plates. In other embodiments, the groove 611 can be provided relatively close to the front and rear end surfaces of the inner platform plate 61 or directly on the front and rear end surfaces of the inner platform plate 61.

[0052] like Figure 5 In the illustrated embodiment, a hole 611' extending in the left-right direction is provided on the end surface of the inner platen 61 facing the outer platen 62. Correspondingly, an insert plate 621' is provided on the end surface of the outer platen 62 facing the inner platen 61 to mate with the hole 611'. The upper end surface of the outer platen 62 and the upper end surface of the inner platen 61 are coplanar.

[0053] While the inserts in the above-described platform 6 design can shield the groove rail and other mating surfaces, a recessed area forms at the junction of the inner and outer platforms during their reciprocating movement, preventing the upper end of the platform from maintaining a flat support surface. In situations where the central tunnel ditch 40 is relatively wide, this recessed area, unable to adequately support the cover plate, can lead to significant structural defects.

[0054] like Figure 6 In the illustrated embodiment, a strip-shaped hole 615 extending in the front-to-back direction is provided at the free end of the inner platform 61. Downward-extending side ears 614 are provided at the front and rear ends of the free end of the inner platform 61. A roller 63 is provided between the two side ears 614, with a felt 64 (or felt cloth) wrapped around it.

[0055] Two side ears 624 are respectively provided on the front and rear end surfaces of the free end of the outer platform 62 .

[0056] The free end of the felt 64 passes through the strip hole 615 upwards and covers the upper end surface of the table 6. The free end of the felt 64 is finally fixed to the second side ear 624, and in the embodiment shown in the figure, it is fixed by bolts or screws.

[0057] The end of the roller 63 is fitted with a torsion spring to allow the felt 64 to be wound around its surface when the roller 63 rotates in the reverse direction. As shown in the figure, when the free end of the felt 64 is pulled leftward toward the free end of the outer platen, the felt 64 drives the roller 63 in a counterclockwise rotation. The felt 64 wrapped around the roller surface continuously breaks away from the roller surface and moves above the upper end surface of the platen 6. At this time, the roller 63 rotates in the reverse direction clockwise, continuously exerting a rightward pulling force on the felt. When the free end of the felt breaks free from the restraint of the second side ear 624, this rightward pulling force pulls the felt back onto the roller surface. During manufacturing, the right side of the end of the strip hole 615 can be machined into an arcuate surface.

[0058] In short, as the outer platen 62 and the inner platen 61 move away from each other, the felt 64 can be pulled off from the roller surface; conversely, as the outer platen 62 and the inner platen 61 move toward each other, the felt can be wound around the roller surface as the roller rotates in the opposite direction.

[0059] In other embodiments, a strip-shaped hole a extending in the front-to-back direction may be provided at the free end of the inner platen. Side ears 1 extending downward are provided at the front and rear ends of the free end of the inner platen, respectively. A roller a is provided between the two side ears 1, and a felt is wound around the roller a. Correspondingly;

[0060] A strip hole b extending in the front-to-back direction is provided at the free end of the outer platform. Side ears two extending downward are provided at the front and rear end surfaces of the free end of the outer platform, and a rotating roller b is provided between the two side ears two.

[0061] The free end of the felt passes through the strip hole a upwards, passes above the upper end surface of the table, and then passes through the strip hole b downwards to be fixed on the rotating roller b.

[0062] At least the shaft end of the roller a or the roller b is sleeved with a torsion spring to enable the corresponding roller to rotate in the opposite direction to wind the felt around the roller surface.

[0063] As the outer and inner plates move away from each other, the ends of the felt can be simultaneously pulled free from both roller surfaces. When the rollers are positioned on one side, the resistance to pulling the felt is reduced. Conversely, as the outer and inner plates move toward each other, the felt can be wound around the roller surfaces as the rollers rotate in opposite directions. When both rollers are equipped with torsion springs to enable reversal, the retraction of the felt or mesh is smoother and faster than when only one roller is equipped with a torsion spring. This helps prevent wrinkles from forming on the felt or mesh due to relatively slow retraction, or even getting stuck between the opposing ends of the outer and inner plates. When both rollers are equipped with torsion springs, the opposite reversal directions of the rollers ensure that the felt is fully tensioned (or stretched), resulting in a smoother and more polished finish when laid on the upper end surface of platen 6.

[0064] like Figure 1 As shown, the upper portion of the vehicle frame 1 is provided with a track groove extending in the left-right direction. Correspondingly, the free ends of the inner platform plates 61, located on the upper portions of the paired slides 2, are each formed with a linear track structure that matches the track groove. During the reciprocating sliding motion of the inner platform plates, their free ends can always maintain a mating relationship with the track groove. This provides sufficient support for both the left and right ends, ensuring that the platform plates provide better support for the (ditch) cover. In the embodiment of this patent, the leftward or rightward movement of the free ends of the outer platform plates 62 is minimized. That is, the left-right width of the entire platform plate is primarily adjusted to match the width spacing between the two ditch sidewalls 20 of the tunnel's central ditch 40 by regulating the movement of the slides 2 and the inner platform plates 61. Movement of the outer platform plates merely serves to supplement the end spacing between the opposing surfaces of the platform plates and the ditch sidewalls.

[0065] like Figure 1 、 Figures 3 to 6As shown, a first rail 612 is provided on the lower end surface of the inner platform 61, and a second rail 622 is provided on the lower end surface of the outer platform 62; correspondingly, a first groove rail 51 and a second groove rail 52 are provided on the upper end surface of the base 5, which correspond to the first rail 612 and the second rail 622 respectively.

[0066] The bottoms of both the first and second groove rails 51 and 52 are provided with strip grooves 53 extending horizontally. Correspondingly, the first clamping rail 612 is provided with a first boss 613, and the second clamping rail 622 is provided with a second boss 623. Both bosses 613 and 623 extend downward and pass through the corresponding strip grooves 53. The lower end of the pedestal 5 is provided with a flange 54 for connection to the end of the cylinder rod of the second hydraulic cylinder.

[0067] The end of the first boss 613 is connected to the first L-shaped tie rod 7, and the end of the second boss 623 is connected to the second L-shaped tie rod 8. The other end of the first tie rod 7 is connected to the cylinder rod of the third hydraulic cylinder 71 fixed to the vehicle frame 1. The other end of the second tie rod 8 is connected to the cylinder rod of the fourth hydraulic cylinder 81 fixed to the vehicle frame. In this way, the extension and retraction of the cylinder rods of the third and fourth hydraulic cylinders can drive the inner platen to move back and forth relative to the first groove rail, and the outer platen to move back and forth relative to the second groove rail in the left and right directions.

[0068] When the felt (felt cloth) is set on the table 6, it can block the entire table 6 and the upper end surface of the base 5, especially the position where the inner and outer table are connected, to prevent sand and gravel from entering the groove, groove rail and other matching surfaces, and affecting the transmission action.

[0069] The first hydraulic cylinder can be a double-rod hydraulic cylinder, with its paired slides mated to the ends of its two rods, or a single-rod hydraulic cylinder, with its two paired slides mated to the ends of the rod of a single first hydraulic cylinder. Similarly, the third or fourth hydraulic cylinder can be constructed using either a double-rod hydraulic cylinder or two single-rod hydraulic cylinders.

[0070] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept. Those skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed by the present invention shall be covered by the claims of the present invention.

Claims

1. A trolley for pouring tunnel center ditch cover, characterized by: The trolley comprises a frame, a pair of slides, a pedestal corresponding to each slide, and a platform corresponding to each pedestal; wheels are provided at the lower part of the frame to drive the trolley to move; The pair of slides are distributed on the left and right sides of the frame and can respectively move back and forth in the left and right directions relative to the frame; The pedestal is fixedly mounted on the upper portion of the slide and is capable of reciprocating in the vertical direction relative to the slide; The platform includes an inner platform and an outer platform, and the inner platform and the outer platform are arranged on the top surface of the base opposite to each other. The outer platform and the inner platform can respectively move back and forth in the left and right directions relative to the platform, so that the two inner platforms provided on the platforms of the paired slides can move closer to and away from each other; A strip hole extending in the front-to-back direction is provided at the free end of the inner platform; side ears extending downward are provided on the front and rear end surfaces of the free end of the inner platform respectively; a roller wrapped with felt or mesh is provided between the two side ears; Two side ears are respectively provided on the front and rear end surfaces of the free end of the outer platform; The free end of the felt or mesh passes upward through the strip hole and passes over the upper end surface of the table and is fixed on the second side ear; The shaft end of the rotating roller is equipped with a torsion spring to enable the rotating roller to rotate in the opposite direction to wind the felt or mesh back onto the roller surface; The upper part of the frame is provided with a track groove extending in the left and right directions. Correspondingly, the free ends of the inner platform plates provided on the upper parts of the paired slides are formed with linear track structures corresponding to the track grooves. During the reciprocating sliding process of the inner platform plates, their free ends can always maintain a matching relationship with the track grooves.

2. The trolley for pouring the central ditch cover of a tunnel according to claim 1, characterized in that: A connecting seat is installed at the lower part of the slide, which is matched with the frame through a linear slide rail structure and can move back and forth synchronously with the slide; a support foot is provided on the connecting seat, which can be raised and lowered in the vertical direction; the lower end surface of the support foot extends downward to the outside of the frame.

3. A trolley for pouring tunnel center ditch cover according to claim 1 or 2, characterized in that: A strip hole a extending in the front-to-back direction is provided at the free end of the inner platen; a roller a wrapped with felt or mesh is provided between the two side ears; A strip hole b extending in the front-to-back direction is provided at the free end of the outer platform; a rotating roller b is provided between the two side ears; The free end of the felt or mesh passes upward through the strip hole a, passes through the upper end surface of the platen, and then passes downward through the strip hole b to be fixed on the rotating roller b; At least the shaft end of the rotating roller a or the rotating roller b is provided with a torsion spring so that the corresponding rotating roller can rotate in the opposite direction to wind the felt or mesh back onto the roller surface.

4. A trolley for pouring tunnel center ditch cover according to claim 1 or 2, characterized in that: A first clamping rail is provided on the lower end surface of the inner platform, and a second clamping rail is provided on the lower end surface of the outer platform; correspondingly, a first groove rail and a second groove rail are provided on the upper end surface of the base, which correspond to the first clamping rail and the second clamping rail respectively; A strip groove extending in the left-right direction is provided at the bottom of the first groove rail and the bottom of the second groove rail; a convex column is provided on the first clamping rail and a convex column is provided on the second clamping rail; the convex column and the convex column extend downward and pass through the corresponding strip groove; The end of the first boss is connected to a first pull rod, and the end of the second boss is connected to a second pull rod; the other end of the first pull rod is connected to the hydraulic cylinder rod fixed on the frame; the other end of the second pull rod is connected to the hydraulic cylinder rod fixed on the frame.

5. A trolley for pouring tunnel center ditch cover according to claim 1 or 2, characterized in that: A groove extending in the left-right direction is provided on the upper end surface of the inner platen on the side close to the outer platen; correspondingly, an insertion rod matching the groove is provided on the end surface of the outer platen facing the inner platen; The upper end surface of the insertion rod, the upper end surface of the outer platform and the upper end surface of the inner platform are in the same plane.

6. A trolley for pouring tunnel center ditch cover according to claim 1 or 2, characterized in that: A channel extending in the left-right direction is provided on the end surface of the inner platen facing the outer platen; correspondingly, an insert plate matching the channel is provided on the end surface of the outer platen facing the inner platen.

Images