Tunnel inverted arch center ditch reserved core mold bottoming device

Abstract

The utility model relates to the field of tunnel construction, in particular to a tunnel inverted arch center ditch reserved core mold bottom lifting device which comprises a mold box, the vertical section of the mold box is of a trapezoidal structure, two sets of fixing transverse plates are sequentially installed in the mold box in the vertical direction, and a plurality of sets of containing grooves are formed in the bottom of the mold box. A placing groove is formed in the top plate, a corresponding bottom lifting plate is installed in the placing groove, a pull rod and a plurality of sets of guide columns are fixedly installed at the upper end of the bottom lifting plate, the pull rod and the multiple sets of guide columns are slidably connected into guide holes formed in the bottom plate, and the pull rod is in transmission connection with a first movable part installed on the top plate through a connecting rope; according to the reserved core mold, the problems that three faces of an existing reserved core mold are clamped in the middle of concrete, meanwhile, the weight of the core mold is too large, the perpendicularity is not easy to control when the core mold is lifted by a hook machine, and the difficulty of detaching the reserved core mold by constructors is greatly improved are solved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a bottoming device for a reserved core mold of a central water ditch of a tunnel invert. Background Art

[0002] At present, the central ditch of the tunnel is designed above the invert, sandwiched in the middle of the filling. When pouring the invert filling, it is necessary to reserve the position of the central ditch and set up a core mold for reservation. The reserved core mold is sandwiched in the middle of the concrete on three sides. At the same time, the core mold is too heavy and the verticality is not easy to control when the crane lifts the core mold, which greatly increases the difficulty for construction workers to dismantle the reserved core mold. Utility Model Content

[0003] The utility model aims to provide a device for lifting the bottom of a reserved core mold for a central ditch of a tunnel invert arch, which solves the problem that the existing reserved core mold is sandwiched between concrete on three sides, the core mold is too heavy and the verticality is not easy to control when the core mold is lifted by a hook machine, which greatly increases the difficulty for construction workers to dismantle the reserved core mold.

[0004] To achieve the above-mentioned purpose, the utility model provides a bottom lifting device for a reserved core mold of a central ditch of a tunnel invert arch, comprising a mold box, which comprises a trapezoidal structure with a vertical cross-section, including two groups of side plates, a top plate, a bottom plate and two groups of end plates, wherein the top plate is provided with a plurality of lifting rings, wherein the width specification of the top plate is greater than the width specification of the bottom plate, and two groups of fixed transverse plates are sequentially installed in the mold box along the vertical direction, and the two ends of the two groups of fixed transverse plates are fixedly connected to the corresponding side plates, and the bottom of the mold box is provided with a plurality of placement grooves, and the placement grooves are used to install the corresponding bottom lifting plates, and the upper end of the bottom lifting plate is fixedly installed with a pull rod and a plurality of guide columns, and the pull rod and the plurality of guide columns are slidably connected to the guide holes provided in the bottom plate, wherein the pull rod is transmission-connected to the first movable member installed on the top plate through a connecting rope, and the two groups of guide columns are transmission-connected to the corresponding second movable member through an elastic member.

[0005] As a further solution of the utility model, the guide columns are provided in two groups, which are respectively fixedly mounted on the two ends of the base plate.

[0006] As a further solution of the utility model, the first movable part is a first driving screw, the upper end of the first driving screw extends out of the top plate of the mold box, and a first fixing nut for threadedly connecting the first driving screw is provided on the upper fixed horizontal plate, and the bottom of the first driving screw is fixedly connected to one end of the connecting rope.

[0007] As a further solution of the utility model, the second movable part is a second driving screw, the upper end of the second driving screw extends out of the top plate of the mold box, and the two groups of fixed cross plates are correspondingly provided with second fixing nuts for threadedly connecting the second driving screw, and the bottom of the second driving screw is transmission-connected to the corresponding guide column through an elastic member.

[0008] As a further solution of the utility model, the elastic member is a coil spring.

[0009] Compared with the existing technology, BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model provides a schematic structural diagram of a device for raising the bottom of a reserved core mold for a central water ditch of a tunnel invert.

[0011] Figure 2 This is a schematic diagram of the interior of the mold box provided by the utility model.

[0012] In the attached drawings: 1. mold box; 101. top plate; 102. side plate; 103. bottom plate; 104. end plate; 2. lifting ring; 3. first driving screw; 4. second driving screw; 5. bottom plate; 6. guide column; 7. coil spring; 8. connecting rope; 9. pull rod. DETAILED DESCRIPTION

[0013] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0014] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, a device for lifting the bottom of a reserved core mold for a central ditch of a tunnel invert arch comprises a mold box 1, which comprises a trapezoidal structure with a vertical cross section, including two groups of side plates 102, a top plate 101, a bottom plate 103 and two groups of end plates 104, wherein the top plate 101 is provided with a plurality of lifting rings 2, wherein the width specification of the top plate 101 is greater than the width specification of the bottom plate 103, two groups of fixed transverse plates are sequentially installed in the mold box 1 along the vertical direction, and the two ends of the two groups of fixed transverse plates are fixedly connected to the corresponding side plates 102, and the bottom of the mold box 1 is provided with a plurality of placement grooves, wherein the placement grooves are used to install corresponding bottom plates 5, and the upper end of the bottom plates 5 is fixedly installed with a pull rod 9 and a plurality of guide columns 6, and the pull rod 9 and the plurality of guide columns 6 are slidably connected to the guide holes provided on the bottom plate 103, wherein the pull rod 9 is transmission-connected to the first movable member installed on the top plate 101 through a connecting rope 8, and the two groups of guide columns 6 are transmission-connected to the corresponding second movable member through an elastic member;

[0015] When the utility model is used, the mold box 1 is lifted to the reserved position for pouring the inverted arch by a lifting device such as an excavator. At this time, the first movable member drives the bottom plate 5 to move up and be tightly buckled in the bottom of the mold box 1 to pour the inverted arch and fill the concrete. When the concrete reaches the final setting state, workers are arranged to lift the bottom.

[0016] First, move the first movable part downward to make the connecting rope 8 in a relaxed state. The relaxation height is sufficient for the bottoming of the mold box 1. Then move the second movable part downward, and the downward force of the elastic part is transmitted to the bottoming plate 5. The elastic part converts the upward force into a lifting force of the mold box 1, so that the mold box 1 slowly rises and breaks away from the clamping force of the concrete. At the same time, since the mold box 1 is an inverted trapezoidal structure, the clamping force of the concrete is reduced.

[0017] like Figure 2 As shown, in the embodiment of the utility model, the number of the guide columns 6 is two groups, which are fixedly installed at the two ends of the base plate 5 respectively. While the two groups of guide columns 6 guide the lifting and lowering of the base plate 5, they are connected to the corresponding second movable part in a transmission manner. Of course, the actual number of the guide columns 6 can also be selected according to the actual situation.

[0018] like Figure 2 As shown, in the embodiment of the utility model, the first movable part is a first driving screw 3, the upper end of the first driving screw 3 extends out of the top plate 101 of the mold box 1, and a first fixing nut for threadedly connecting the first driving screw 3 is provided on the upper fixed transverse plate, and the bottom of the first driving screw 3 is fixedly connected to one end of the connecting rope 8. In the utility model, the first driving screw 3 is rotated and the first fixing nut is driven to realize its lifting and lowering movement, thereby realizing the loosening or tightening of the connecting rope 8.

[0019] like Figure 2 As shown, in the embodiment of the utility model, the second movable member is a second driving screw 4, the upper end of the second driving screw 4 extends out of the top plate 101 of the mold box 1, and the two groups of the fixed transverse plates are correspondingly provided with second fixed nuts for threaded connection with the second driving screw 4, and the bottom of the second driving screw 4 is transmission-connected with the corresponding guide column 6 through an elastic member. The utility model realizes the downward movement of the second driving screw 4 by rotating the second driving screw 4, and realizes the downward pressure transmission of the bottom plate 5. At the same time, the first driving screw 3 and the second driving screw 4 are both manually driven to rotate, and the tops of the first driving screw 3 and the second driving screw 4 are correspondingly provided with a group of holding rings;

[0020] Furthermore, the elastic member is a coil spring 7 , and the coil spring 7 can elastically absorb the downward pressure of the second driving screw 4 and transmit it to the corresponding guide column 6 .

[0021] To sum up the above, the overall mold box 1 of the utility model can be automatically lifted by manual operation, which reduces the use of equipment deployment. At the same time, the bottom lifting and top support structure is simple, the components are fixed, the recycling is strong, and it is not easy to be damaged when used in the internal space. The overall core mold of the mold box 1 is wide at the top and narrow at the bottom, which reduces the clamping force of the concrete. The manual operation is simple, saves labor and machine hours, and reduces costs. It solves the problem that the existing reserved core mold is sandwiched in the middle of the concrete on three sides, and the core mold is too heavy and the verticality is not easy to control when the hook machine lifts the core mold, which greatly increases the difficulty for construction personnel to disassemble the reserved core mold.

[0022] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A device for raising the bottom of a reserved core mold for a central ditch of a tunnel invert arch, characterized in that: It includes a mold box, which includes a trapezoidal structure with a vertical cross-section, including two groups of side plates, a top plate, a bottom plate and two groups of end plates, wherein a plurality of lifting rings are installed on the top plate, wherein the width specification of the top plate is greater than the width specification of the bottom plate, and two groups of fixed cross plates are installed in sequence along the vertical direction in the mold box, and both ends of the two groups of fixed cross plates are fixedly connected to the corresponding side plates, and a plurality of placement grooves are provided at the bottom of the mold box, and the placement grooves are used to install corresponding bottom plates, and a pull rod and a plurality of guide columns are fixedly installed on the upper end of the bottom plate, and the pull rod and the plurality of guide columns are slidably connected to the guide holes provided in the bottom plate, wherein the pull rod is transmission connected to the first movable member installed on the top plate through a connecting rope, and the two groups of guide columns are transmission connected to the corresponding second movable members through elastic members.

2. The device for preparing the bottom of a reserved core mold for a central ditch of a tunnel invert according to claim 1, characterized in that: The guide posts are in two groups, which are respectively fixedly mounted on the two ends of the base plate.

3. The device for preparing the bottom of a reserved core mold for a central ditch of a tunnel invert according to claim 1, characterized in that: The first movable part is a first driving screw, the upper end of which extends out of the top plate of the mold box, and a first fixing nut for threadedly connecting the first driving screw is provided on the upper fixed horizontal plate, and the bottom of the first driving screw is fixedly connected to one end of the connecting rope.

4. The device for preparing the bottom of a reserved core mold for a central ditch of a tunnel invert according to claim 1, characterized in that: The second movable part is a second driving screw, the upper end of which extends out of the top plate of the mold box, and the two groups of fixed cross plates are correspondingly provided with second fixing nuts for threadedly connecting the second driving screw, and the bottom of the second driving screw is transmission-connected to the corresponding guide column through an elastic member.

5. The device for raising the bottom of a reserved core mold for a central ditch of a tunnel invert according to claim 1, characterized in that: The elastic member is a coil spring.

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