Protective device for tunnel portal

Abstract

The utility model relates to the technical field of engineering equipment, and discloses a protective device for a tunnel portal, which comprises an arched ceiling and a support, the ceiling is erected above the portal through the support, a moving part is mounted at the bottom of the support, the support comprises a barrel, a reinforcing rod and a connecting rod, the moving part is mounted at the bottom of the barrel, and the connecting rod is connected with the reinforcing rod. The barrel bodies are divided into two sets, the reinforcing rods are in an X shape, every two adjacent barrel bodies in each set are connected through one reinforcing rod, one connecting rod is inserted into each barrel body, the ceiling is fixed to the connecting rods, buffer springs are further arranged in the barrel bodies, and the buffer springs are compressed and installed in the barrel bodies through the connecting rods. The beneficial effects of the utility model are that the arched ceiling enables small stones to sputter towards the periphery of the road surface and the direction of the mountain at any time, the ceiling is prevented from being crushed by accumulation, and the springs are used for damping, so that the connecting pieces of the device are not easy to loosen, the maintenance frequency of the device is reduced, and the use cost of the device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering equipment technical field, especially a protection device for tunnel portal. BACKGROUND

[0002] Tunneling is a very important link in tunnel construction, and tunnel portal excavation is a key and difficult point of tunneling. The common tunnel construction sequence is to excavate the portal side slope first, support the slope in time, excavate to the design elevation of the advanced support, immediately perform advanced support construction, use a hydraulic breaking hammer to excavate the portal when the support strength meets the design requirements, complete the support at the bright-dark junction before portal construction, meet the blasting excavation conditions, and then use the blasting method to perform tunneling. There are risks such as rockfall and collapse in the portal and portal construction side slope, in order to avoid the damage to the tunnel portal running vehicles and personnel caused by the slope dangerous rockfall, engineering measures are usually taken to protect it.

[0003] Chinese utility model (authorized announcement number: CN212714608U name: a protection shed for mountain ridge tunnel portal) includes protection shed framework and detachable installation on the upper part of protection shed framework for intercepting the intercepting device of stone, the intercepting device includes a plurality of layers of first intercepting nets in large grid shape and a plurality of layers of second intercepting nets in small grid shape from top to bottom in turn, the four side surfaces of protection shed framework are all welded with cross-shaped reinforcing framework, solve the inconvenient use and maintenance problem existing in the prior art tunnel portal protection shed, but its top intercepting net is used to intercept the stone, first, the stone accumulation is easy to cause the damage of intercepting net, and it needs to be replaced frequently; second, when the stone collides with the intercepting net, the bottom support frame will produce violent vibration, which is easy to cause the loosening of device connecting piece, and further increase the maintenance frequency of the device. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a protection device for tunnel portal to overcome the shortcomings of the prior art.

[0005] The utility model discloses a protection device for tunnel portal, including the arched roof and support, the roof is set up the above the portal through support, the bottom of support is installed with mobile piece, its characterized in that: support includes cylinder, reinforcing rod and connecting rod, mobile piece installs the bottom of cylinder, the cylinder is several roots and divides into two groups, two cylinder groups are located the both sides of tunnel respectively, every group cylinder is arranged along the extension direction of tunnel, the reinforcing rod is X -shaped, and the adjacent two cylinder in every group are connected through a reinforcing rod, and one connecting rod is inserted in every cylinder, and the roof is fixed on the connecting rod, and buffer spring is also arranged in the cylinder, and buffer spring is installed in the cylinder through the compression of connecting rod.

[0006] Preferably, the side wall of the cylinder is provided with an oblong through hole extending along the axis of the cylinder, and the insertion end of the connecting rod is provided with a limiting pin slidingly installed in the oblong through hole.

[0007] Preferably, the mobile piece comprises a base, a roller and a brake pad, the base is fixed to the bottom of the cylinder, the roller and the brake pad are rotatably installed on the base, the rotation shaft of the roller is away from the rotation shaft of the brake pad, the brake pad is provided with a U-shaped groove away from the rotation shaft, and the roller is fixed with a positioning column, and the roller is locked by clamping the U-shaped groove on the positioning column.

[0008] Preferably, the roller is circumferentially provided with at least three positioning columns.

[0009] Preferably, the base is further provided with a limiting spring for resetting the brake pad after unlocking.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The arched roof allows the small stone to splash in all directions around the road surface and the mountain body at any time, avoids the accumulation and damages the roof, simultaneously reduces the maintenance frequency of the device through the spring shock absorption, and reduces the use cost of the device. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structure of the utility model is shown in the figure;

[0013] Figure 2 The structure of the mobile piece is shown in the figure;

[0014] Figure 3 The structure of the mobile piece is shown in the figure; Figure 1 The local enlarged schematic view of A in the figure;

[0015] In the figure, 1 - roof, 2 - moving piece, 3 - cylinder, 4 - reinforcing rod, 5 - connecting rod, 6 - buffer spring, 7 - long circular hole, 8 - limit pin, 9 - base, 10 - roller, 11 - brake pad, 12 - U-shaped groove, 13 - positioning column, 14 - limit spring. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0018] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0019] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term '' set '', '' install '', '' link '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two elements inside the intercommunication. For ordinary skilled person in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0022] As Figure 1 And 3 The utility model discloses a protective device for tunnel portal, including arched roof 1 and support, roof 1 is set up in the upper portion of portal through support, the bottom of support is installed with moving part 2, support includes cylinder 3, reinforcing rod 4 and connecting rod 5, moving part 2 is installed at the bottom of cylinder 3, and cylinder 3 is several and is divided into two groups, and two groups of cylinder 3 are located at the both sides of tunnel respectively, and each group of cylinder 3 is arranged along the extension direction of tunnel, and reinforcing rod 4 is X-shaped, and the adjacent two cylinders 3 in each group are connected by a reinforcing rod 4, and a connecting rod 5 is inserted in each cylinder 3, and the roof 1 is fixed on the connecting rod 5, and buffer spring 6 is also arranged in the cylinder 3, and the buffer spring 6 is compressed and installed in the cylinder 3 through the connecting rod 5, and the arched roof 1 makes the small stone that hits splash to the surrounding road surface and mountain direction at any time, avoids the accumulation and presses down roof 1, simultaneously, and the spring 14 is used for shock absorption, and the device connecting piece is not easy to cause loosening, and the maintenance frequency of the device is reduced, thereby reducing the use cost of the device.

[0023] In the embodiment, as Figure 1 And 3 The utility model discloses a protective device for tunnel portal, including arched roof 1 and support, roof 1 is set up in the upper portion of portal through support, the bottom of support is installed with moving part 2, support includes cylinder 3, reinforcing rod 4 and connecting rod 5, moving part 2 is installed at the bottom of cylinder 3, and cylinder 3 is several and is divided into two groups, and two groups of cylinder 3 are located at the both sides of tunnel respectively, and each group of cylinder 3 is arranged along the extension direction of tunnel, and reinforcing rod 4 is X-shaped, and the adjacent two cylinders 3 in each group are connected by a reinforcing rod 4, and a connecting rod 5 is inserted in each cylinder 3, and the roof 1 is fixed on the connecting rod 5, and buffer spring 6 is also arranged in the cylinder 3, and the buffer spring 6 is compressed and installed in the cylinder 3 through the connecting rod 5, and the arched roof 1 makes the small stone that hits splash to the surrounding road surface and mountain direction at any time, avoids the accumulation and presses down roof 1, simultaneously, and the spring 14 is used for shock absorption, and the device connecting piece is not easy to cause loosening, and the maintenance frequency of the device is reduced, thereby reducing the use cost of the device.

[0024] In the embodiment, as Figure 2 The utility model discloses a protective device for tunnel portal, including arched roof 1 and support, roof 1 is set up in the upper portion of portal through support, the bottom of support is installed with moving part 2, support includes cylinder 3, reinforcing rod 4 and connecting rod 5, moving part 2 is installed at the bottom of cylinder 3, and cylinder 3 is several and is divided into two groups, and two groups of cylinder 3 are located at the both sides of tunnel respectively, and each group of cylinder 3 is arranged along the extension direction of tunnel, and reinforcing rod 4 is X-shaped, and the adjacent two cylinders 3 in each group are connected by a reinforcing rod 4, and a connecting rod 5 is inserted in each cylinder 3, and the roof 1 is fixed on the connecting rod 5, and buffer spring 6 is also arranged in the cylinder 3, and the buffer spring 6 is compressed and installed in the cylinder 3 through the connecting rod 5, and the arched roof 1 makes the small stone that hits splash to the surrounding road surface and mountain direction at any time, avoids the accumulation and presses down roof 1, simultaneously, and the spring 14 is used for shock absorption, and the device connecting piece is not easy to cause loosening, and the maintenance frequency of the device is reduced, thereby reducing the use cost of the device.

[0025] In the embodiment, as shown in Figure 2 A limit spring 14 is also installed on the base 9, which is used for resetting the brake pad 11 after unlocking, avoiding the locked roller 10 due to the rotation of the brake pad 11 after unlocking caused by vibration.

[0026] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and 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 protective device for a tunnel portal, comprising an arched roof (1) and a support, the roof (1) being erected above the portal by means of the support, a mobile element (2) being mounted at the bottom of the support, characterized in that: The support comprises a cylinder (3), a reinforcing rod (4) and a connecting rod (5), the moving part (2) is installed at the bottom of the cylinder (3), the cylinder (3) is several and is divided into two groups, two groups of the cylinder (3) are respectively located at two sides of the tunnel, each group of the cylinder (3) is arranged along the extension direction of the tunnel, the reinforcing rod (4) is X-shaped, two adjacent cylinders (3) in each group are connected by one reinforcing rod (4), one connecting rod (5) is inserted into each cylinder (3), the ceiling (1) is fixed on the connecting rod (5), the cylinder (3) is further provided with a buffer spring (6), the buffer spring (6) is compressed and installed in the cylinder (3) through the connecting rod (5), a long circular through hole (7) is formed in the side wall of the cylinder (3) and extends along the axis direction of the cylinder (3), the insertion end of the connecting rod (5) is installed with a limiting pin (8), the limiting pin (8) is slidingly installed in the long circular through hole (7), the moving part (2) comprises a base (9), a roller (10) and a brake pad (11), the base (9) is fixed at the bottom of the cylinder (3), the roller (10) and the brake pad (11) are both rotationally installed on the base (9), the rotation shaft of the roller (10) is away from the rotation shaft of the brake pad (11), a U-shaped groove (12) is formed at the position away from the rotation shaft of the brake pad (11), the roller (10) is fixed with a positioning column (13), the roller (10) is locked by clamping the U-shaped groove (12) on the positioning column (13), at least three positioning columns (13) are uniformly distributed on the roller (10), and a limiting spring (14) is further installed on the base (9), and the limiting spring (14) is used for resetting the brake pad (11) after unlocking.

Images