Temporary portal support device for tunnel construction channel

Abstract

The utility model discloses a tunnel construction channel temporary portal support device, which belongs to the technical field of tunnel support, and comprises a portal, the portal is formed by splicing two vertical rods and a cross rod fixedly connected between the tops of the two vertical rods, a plurality of chutes are arranged in the cross rod side by side, bidirectional screws are rotatably mounted in the chutes, and the two-way screws are connected with the two vertical rods through bolts. Sliding blocks are in threaded connection with opposite threads of the two-way screw rods, the sliding blocks are slidably connected into the sliding grooves, connecting rods are hinged to the sliding blocks, supporting cross rods are hinged to the ends, away from the sliding blocks, of the connecting rods, every two connecting rods in the same sliding groove are symmetrically arranged, and the ends, away from the sliding blocks, of the connecting rods are hinged to the same supporting cross rod; and the supporting cross rod and the cross rod are arranged in parallel. According to the utility model, the plurality of two-way screws are rotated at the same time, so that the supporting cross rod moves up and down through the connecting rod, the supporting height is adjusted, the application range is widened, and the construction period is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel support technical field, concretely relates to a tunnel construction passageway temporary door frame support device. BACKGROUND

[0002] In tunnel construction, due to the limitation of route and terrain, in order to reduce the deformation of surrounding rock caused by excavation and other adverse effects, and ensure the stability of surrounding rock during excavation, temporary support structure of tunnel is needed.

[0003] The prior art such as the Chinese patent with the announcement number CN 204492851 U discloses a subway tunneling tunnel horizontal passageway temporary support component, which forms a support door frame matched with the tunnel by erecting a steel frame, so as to play a supporting role on the tunnel. However, the support door frame in the above-mentioned technology is adapted to the preset passageway height and is difficult to adjust, and can only be used for single use for the preset construction height, which reduces the construction application range and wastes the construction period in the assembly process before construction.

[0004] Therefore, a tunnel construction passageway temporary door frame support device needs to be proposed to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a tunnel construction passageway temporary door frame support device to solve the problem that the support door frame in the prior art cannot adjust the height, which leads to low construction application range and wastes the construction period in the assembly process.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a tunnel construction passageway temporary door frame support device, including door frame, the door frame is spliced by two vertical rods and the cross bar fixedly connected between the top of two vertical rods, a plurality of sliding slots are arranged side by side in the cross bar, bidirectional screw rod is rotatably installed in the sliding slot, the sliding block is threadedly connected on the opposite thread of bidirectional screw rod, the sliding block is slidably connected in the sliding slot, the connecting rod is hinged on the sliding block, the support cross bar is hinged on the end away from the sliding block of connecting rod, two connecting rods in the same sliding slot are symmetrically arranged, a plurality of connecting rods are hinged on the same support cross bar away from the sliding block, and the support cross bar is arranged in parallel with the cross bar.

[0008] Further, the support cross bar is limitingly and slidably connected with the cross bar.

[0009] Further, the support cross bar is limitingly and slidably connected with the cross bar.

[0010] Further, the cross bar is rotatably connected with the rotating shaft penetrating through a plurality of sliding slots, and the bidirectional screw rod is fixedly connected with the rotating shaft.

[0011] Further, the length of the support cross bar is consistent with the length of the cross bar.

[0012] Further, the inclined support bar is fixedly connected between the cross bar and the vertical bar.

[0013] The utility model discloses the beneficial effect lies in:

[0014] The utility model discloses through the rotation of multiple bidirectional screw rods simultaneously, moves up and down with the support cross bar through the connecting rod to adjust the support height, improves the scope of application, saves the construction period.

[0015] The other advantages, objects and features of the utility model will be set forth in the subsequent specification, and are, to some extent, apparent to those skilled in the art and can be taught by the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the utility model's purpose, technical scheme and beneficial effect more clear, the utility model provides the following drawings for explanation:

[0017] Fig. 1 It is the sectional view of the whole structure of the utility model embodiment at the support cross bar;

[0018] Fig. 2 It is the whole structure installation schematic drawing of the utility model embodiment.

[0019] The drawings are marked as follows: portal frame 1, vertical bar 101, cross bar 102, sliding groove 103, bidirectional screw rod 104, inclined support bar 105, sliding block 2, connecting rod 201, support cross bar 3, recess 301, rotating shaft 4. DETAILED DESCRIPTION

[0020] As Figs. 1-2 The utility model provides a kind of temporary portal frame support device of tunnel construction passageway, comprising: portal frame 1, the portal frame 1 is spliced by two vertical bars 101 and one cross bar 102 being set between the top of two vertical bars 101, multiple sliding grooves 103 are arranged in the cross bar 102 side by side, bidirectional screw rod 104 is rotatably installed in the sliding groove 103, sliding block 2 is threadedly connected on the opposite thread of bidirectional screw rod 104, the sliding block 2 is slidably connected in sliding groove 103, connecting rod 201 is hinged on the sliding block 2, support cross bar 3 is hinged on the end of connecting rod 201 away from sliding block 2, the length of the support cross bar 3 is consistent with the length of the cross bar 102, two connecting rods 201 in same sliding groove 103 are symmetrically arranged, multiple connecting rods 201 are hinged on same support cross bar 3 on the end away from sliding block 2, and the support cross bar 3 is arranged in parallel with the cross bar 102.

[0021] In the scheme, when the height needs to be adjusted, the plurality of bidirectional screw rods 104 are rotated at the same time to move the support cross bar 3 up and down through the connecting rod 201 to adjust the support height.

[0022] In an embodiment of the utility model, the support cross bar 3 is provided with a groove 301, and the cross bar 102 is slidingly connected in the groove 301.

[0023] In the scheme, the sliding connection between the support cross bar 3 and the cross bar 102 is realized by setting the groove 301, so that the stability of the sliding of the support cross bar 3 is ensured.

[0024] In an embodiment of the utility model, the cross bar 102 is rotatably connected with a rotating shaft 4 penetrating through the plurality of sliding grooves 103, and the bidirectional screw rod 104 is fixedly connected with the rotating shaft 4.

[0025] In the scheme, the plurality of bidirectional screw rods 104 can be rotated at the same time by rotating the rotating shaft 4, so as to facilitate the operation.

[0026] In an embodiment of the utility model, the cross bar 102 and the vertical rod 101 are fixedly connected with a diagonal bracing rod 105, so as to improve the stability of the portal frame 1.

[0027] Finally, it is to be explained that the above preferred embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail through the above preferred embodiments, but those skilled in the art should understand that various changes can be made in the form and details without departing from the range defined by the utility model claim book.

Claims

1. A temporary gantry support arrangement for a tunnel construction access comprising a gantry characterised in that: The gate frame is spliced by two vertical rods and a cross rod fixedly connected between the top of the two vertical rods, multiple sliding grooves are arranged side by side in the cross rod, a bidirectional screw rod is rotatably installed in the sliding groove, a sliding block is threadedly connected on the opposite threads of the bidirectional screw rod, the sliding block is slidably connected in the sliding groove, a connecting rod is hinged on the sliding block, a support cross rod is hinged on the end of the connecting rod away from the sliding block, the two connecting rods in the same sliding groove are symmetrically arranged, and the multiple connecting rods are hinged on the same support cross rod away from the sliding block.

2. The temporary portal support for tunnel construction of claim 1, wherein: The support cross rod is limitingly and slidably connected with the cross rod.

3. A temporary portal support for a tunneling portal in accordance with claim 2, wherein: The support cross rod is provided with a groove, and the cross rod is limitingly and slidably connected in the groove.

4. The temporary portal support of claim 3, wherein: A rotating shaft penetrating through the multiple sliding grooves is rotatably connected in the cross rod, and the bidirectional screw rod is fixedly connected with the rotating shaft.

5. The temporary portal support arrangement for a tunneling portal according to claim 4, characterized in that: The length of the support cross rod is consistent with the length of the cross rod.

6. The temporary portal support arrangement for a tunneling portal according to claim 5, characterized in that: An inclined support rod is fixedly connected between the cross rod and the vertical rod.

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