A tunnel safety support device

Abstract

The present invention is applicable to the technical field of tunnel construction auxiliary equipment, and provides a tunnel safety support device, including a support part. The support part includes a support rod, and further includes: a support assembly, the support assembly includes two first support blocks connected by an adjustment assembly, and a plurality of second support blocks are distributed between the two first support blocks. A protective chain net is connected between the first support block and the second support block, and between two adjacent second support blocks; one end of the protective chain net is connected with a first winding assembly, the first winding assembly includes a first winding roller for installing the protective chain net, and a first motor is further installed in the first installation cavity. The connecting shaft of the first winding roller is connected with the output end of the first motor through a transmission assembly. This device can be automatically adjusted according to different tunnel widths, so as to effectively support the arc top of the tunnel adaptively, with strong adaptability, simple operation and convenient installation.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction auxiliary equipment, and particularly relates to a tunnel safety support device. Background Art

[0002] A tunnel is an engineering structure buried in the stratum, which is a form of human utilization of underground space. The excavation and construction of a tunnel will cause large deformations of the surrounding rock, so it is necessary to support the tunnel during the construction process.

[0003] At present, most of the existing tunnel support devices support the tunnel by setting a top baffle and multiple support rods below. In such a structure, the top plate mostly has a fixed size, so there is a problem of poor applicability. If the top plate assembled by multiple module designs is used for support, there will be problems of cumbersome installation and disassembly processes. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a tunnel safety support device, aiming to solve the problems proposed in the above background art.

[0005] The embodiments of the present invention are implemented as follows. A tunnel safety support device includes a support part, and the support part includes telescopic support rods. It also includes:

[0006] A support assembly, the support assembly includes two symmetrically arranged first support blocks, an adjustment assembly is connected between the two first support blocks, at least two support rods are installed at the bottom of each first support block, several second support blocks are equidistantly distributed between the two first support blocks, and each second support block is connected to the adjustment assembly. The adjustment assembly is used to drive each second support block to move synchronously according to the distance change between the two first support blocks, and make each first support block and second support block evenly distributed on the same semi-circle. A protective chain net is connected between the first support block and the second support block, and between adjacent two second support blocks;

[0007] One end of the protective chain net is connected to a first winding assembly, and the protective chain net is only connected to the first winding assembly at one end. The first winding assembly includes a first installation cavity opened in the second support block or the first support block. A first winding roller is installed in the first installation cavity. One end of the protective chain net is wound on the first winding roller, and both ends of the first winding roller are installed on two opposite side walls of the first installation cavity through first installation rings. A first motor is also installed in the first installation cavity. An avoidance cavity matching the first motor is opened at one end of the first winding roller. A connecting shaft is arranged at one end of the first winding roller close to the first motor, and the connecting shaft is connected to the output end of the first motor through a transmission component;

[0008] The transmission assembly includes a torsion spring sleeved on the connecting shaft, and the torsion spring is connected to the first winding roller through an auxiliary connecting rod. A plurality of insertion rods are annularly installed on the connecting shaft, and the insertion rods are slidably installed in the connecting shaft. The insertion rods are connected to the inside of the connecting shaft through return springs. A positioning slot matching the insertion rod is provided on the output end of the first motor. An extrusion plate is arranged at one end of the insertion rod close to the torsion spring, and the extrusion plate abuts against the torsion spring. A limiting groove matching the extrusion plate is provided on the side wall of the connecting shaft.

[0009] In a further technical solution, the support rod includes a support cylinder, a sliding support rod is slidably installed in the support cylinder, and the top of the sliding support rod is connected to the first support block. A fixing component for fixing the sliding support rod is also provided on the support cylinder. A connecting cross bar is connected between two support rods installed at the bottom of the same first support block, and both ends of the connecting cross bar are connected to the support cylinder or the sliding support rod in the support rod through fixing rings.

[0010] In a further technical solution, the fixing component includes a positioning bolt installed on the support cylinder, and a plurality of positioning holes matching the positioning bolt are vertically distributed on the sliding support rod.

[0011] In a further technical solution, the adjusting component includes a mounting plate, an auxiliary mounting plate is installed on the mounting plate, a plurality of telescopic support rods are annularly installed on the auxiliary mounting plate within the range of 0° to 180°. The number of the telescopic support rods is the same as the sum of the numbers of the first support block and the second support block, and each telescopic support rod is correspondingly connected to a first support block or a second support block. A rotating block is rotatably installed on the auxiliary mounting plate, a plurality of first connecting rods are annularly installed on the rotating block within the range of 0° to 180°. The number of the first connecting rods is the same as the number of the telescopic support rods. An L-shaped connecting rod is rotatably installed on the first connecting rod, and one end of the L-shaped connecting rod far from the first connecting rod is connected to the movable end of the telescopic support rod through a second connecting rod.

[0012] In a further technical solution, five telescopic support rods are provided.

[0013] In a further technical solution, one end of the protective chain net far from the first winding component is connected to the second winding component, and the second winding component is used to keep the protective chain net always in a tensioned state.

[0014] Further technical solution: The second winding assembly includes a second installation cavity formed in the first support block or the second support block. A second winding roller is installed in the second installation cavity, and both ends of the second winding roller are installed on two opposite side walls of the second installation cavity through second installation rings. A second motor is installed in the second installation cavity, and an avoidance cavity matching the second motor is formed at one end of the second winding roller. The output end of the second motor is connected to the second winding roller.

[0015] When the tunnel safety support device provided by the embodiment of the present invention is in use, first adjust the distance between the two first support blocks according to the width of the tunnel, so that the support rod is as close as possible to the edge of the tunnel, and then fix it. At the same time, make the first support block installed on the top of the support rod flush with the lower edge of the tunnel arch. At this time, under the action of the adjustment assembly, the first support block and the second support block will support the arch of the tunnel, and the first support block and the second support block will be evenly distributed, making the support more stable. At the same time, the tensioned protective chain net will also play a protective role to prevent gravel and the like from falling from the top of the tunnel. When a larger piece of gravel falls on the protective chain net or there is a large amount of gravel accumulated on the protective chain net, the protective chain net will elongate, thereby driving the first winding roller to rotate. The first winding roller drives the coil spring to move through the auxiliary connecting rod, so that the coil spring contracts. The coil spring makes the insertion rod insert into the positioning slot by squeezing the pressing plate. At this time, the output end of the first motor can drive the connecting shaft to rotate, thereby driving the first winding roller to rewind the protective chain net onto the first winding roller. At this time, the protective chain net will tighten, thereby holding the gravel and preventing it from falling. Since the contact between the protective chain net and the gravel is flexible, the impact force of the gravel will not cause great damage to the protective chain net, thus effectively avoiding the situation of component damage caused by gravel impact. The device can be automatically adjusted according to different tunnel widths, so as to adaptively and effectively support the arch of the tunnel. It has strong adaptability, simple operation and convenient installation. Brief Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of a tunnel safety support device provided by an embodiment of the present invention;

[0017] Figure 2 It is a side view of a tunnel safety support device provided by an embodiment of the present invention;

[0018] Figure 3 It is a structural schematic diagram of an adjustment assembly in a tunnel safety support device provided by an embodiment of the present invention;

[0019] Figure 4 It is an internal structural schematic diagram of a second support block in a tunnel safety support device provided by an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the lateral internal structure of the second support block in a tunnel safety support device provided by an embodiment of the present invention;

[0021] Figure 6 In a tunnel safety support device provided by an embodiment of the present invention Figure 4 Enlarged view at position A in;

[0022] Figure 7 Schematic diagram of the structure of the transmission component in a tunnel safety support device provided by an embodiment of the present invention.

[0023] In the drawings: support part 1; support cylinder 11; sliding support rod 12; connecting cross bar 13; fixing ring 14; fixing component 2; positioning bolt 21; positioning hole 22; support component 3; first support block 31; second support block 32; protective chain net 33; first winding component 4; first installation cavity 41; first winding roller 42; first motor 43; connecting shaft 44; first installation ring 45; adjusting component 5; installation plate 51; auxiliary installation plate 52; telescopic support rod 53; rotating block 54; first connecting rod 55; L-shaped connecting rod 56; second connecting rod 57; second winding component 6; second installation cavity 61; second winding roller 62; second motor 63; second installation ring 64; transmission component 7; coil spring 71; inserting rod 72; reset spring 73; positioning slot 74; limiting slot 75; pressing plate 76; auxiliary connecting rod 77. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0026] As Figure 1 、 2 、4, 5, 6 and 7 show, a tunnel safety support device provided by an embodiment of the present invention includes a support part 1, and the support part 1 includes a telescopic support rod, and further includes:

[0027] Support component 3, the support component 3 includes two symmetrically arranged first support blocks 31, an adjustment component 5 is connected between the two first support blocks 31, at least two support rods are installed at the bottom of each first support block 31, and a number of second support blocks 32 are equidistantly distributed between the two first support blocks 31, and each second support block 32 is connected to the adjustment component 5. The adjustment component 5 is used to drive each second support block 32 to move synchronously according to the change in the distance between the two first support blocks 31, and make each first support block 31 and second support block 32 evenly distributed on the same semi-circle. A protective chain net 33 is connected between the first support block 31 and the second support block 32, and between two adjacent second support blocks 32;

[0028] One end of the protective chain net 33 is connected to a first winding component 4, and the protective chain net 33 is only connected to the first winding component 4 at one end. The first winding component 4 includes a first installation cavity 41 opened in the second support block 32 or the first support block 31. A first winding roller 42 is installed in the first installation cavity 41. One end of the protective chain net 33 is wound on the first winding roller 42, and both ends of the first winding roller 42 are installed on two opposite side walls of the first installation cavity 41 through first installation rings 45. A first motor 43 is also installed in the first installation cavity 41, and an avoidance cavity matching the first motor 43 is opened at one end of the first winding roller 42. A connecting shaft 44 is arranged at one end of the first winding roller 42 close to the first motor 43, and the connecting shaft 44 is connected to the output end of the first motor 43 through a transmission component 7;

[0029] The transmission component 7 includes a coil spring 71 sleeved on the connecting shaft 44, and the coil spring 71 is connected to the first winding roller 42 through an auxiliary connecting rod 77. A number of insertion rods 72 are annularly installed on the connecting shaft 44, and the insertion rods 72 are slidably installed in the connecting shaft 44. The insertion rods 72 are connected to the inside of the connecting shaft 44 through return springs 73. A positioning slot 74 matching the insertion rods 72 is opened on the output end of the first motor 43. An extrusion plate 76 is arranged at one end of the insertion rod 72 close to the coil spring 71, and the extrusion plate 76 abuts against the coil spring 71. A limiting groove 75 matching the extrusion plate 76 is arranged on the side wall of the connecting shaft 44.

[0030] In the embodiment of the present invention, during use, first adjust the distance between the two first support blocks 31 according to the width of the tunnel, so that the support rod is as close as possible to the edge of the tunnel, and then fix it. At the same time, make the first support block 31 installed on the top of the support rod flush with the lower edge of the tunnel crown. At this time, under the action of the adjustment assembly 5, the first support block 31 and the second support block 32 will support the crown of the tunnel, and the first support block 31 and the second support block 32 will be evenly distributed, making the support more stable. At the same time, the tensioned protective chain net 33 will also play a protective role to prevent gravel and the like from falling from the top of the tunnel. When a relatively large piece of gravel falls on the protective chain net 33, or when there is a large accumulation of gravel on the protective chain net 33, the protective chain net 33 will elongate, thereby driving the first winding roller 42 to rotate. The first winding roller 42 drives the coil spring 71 to move through the auxiliary connecting rod 77, so that the coil spring 71 contracts. The coil spring 71 makes the insertion rod 72 insert into the positioning slot 74 by squeezing the extrusion plate 76. At this time, the output end of the first motor 43 can drive the connecting shaft 44 to rotate, thereby driving the first winding roller 42 to rewind the protective chain net 33 onto the first winding roller 42. At this time, the protective chain net 33 will be tightened, so as to hold the gravel and prevent it from falling. Since the contact between the protective chain net 33 and the gravel is flexible, the impact force of the gravel will not cause great damage to the protective chain net 33, thereby effectively avoiding the occurrence of component damage caused by gravel impact.

[0031] As Figure 1 and 2 shown, as a preferred embodiment of the present invention, the support rod includes a support cylinder 11. A sliding support rod 12 is slidably installed in the support cylinder 11, and the top of the sliding support rod 12 is connected to the first support block 31. The support cylinder 11 is also provided with a fixing assembly 2 for fixing the sliding support rod 12. A connecting cross bar 13 is connected between the two support rods installed at the bottom of the same first support block 31, and both ends of the connecting cross bar 13 are connected to the support cylinder 11 or the sliding support rod 12 in the support rod through fixing rings 14, thereby effectively increasing the stability between the two support rods and enhancing the support capacity of the device.

[0032] In the embodiment of the present invention, during use, the installation height of the first support block 31 can be adjusted by sliding the sliding support rod 12 up and down, so that the first support block 31 remains flush with the lower edge of the tunnel crown. Then the fixing assembly 2 stably fixes the sliding support rod 12 in the support cylinder 11, and the height of the support rod can be fixed.

[0033] As Figure 1 and 2As shown in the figure, as a preferred embodiment of the present invention, the fixing component 2 includes a positioning bolt 21 installed on the support cylinder 11, and a plurality of positioning holes 22 matching the positioning bolt 21 are vertically distributed on the sliding support rod 12.

[0034] In the embodiment of the present invention, after the sliding support rod 12 is adjusted to the specified height, the positioning bolt 21 is inserted into the positioning hole 22 at the corresponding position, and then the positioning bolt 21 is locked, so as to fix the sliding support rod 12. The operation is convenient and the disassembly and assembly are flexible.

[0035] As Figure 2 and 3 As shown in the figure, as a preferred embodiment of the present invention, the adjusting component 5 includes a mounting plate 51, an auxiliary mounting plate 52 is installed on the mounting plate 51, a plurality of telescopic support rods 53 are annularly installed on the auxiliary mounting plate 52 within the range of 0° to 180°, the number of the telescopic support rods 53 is the same as the sum of the numbers of the first support block 31 and the second support block 32, and each telescopic support rod 53 is correspondingly connected to a first support block 31 or a second support block 32. A rotating block 54 is rotatably installed on the auxiliary mounting plate 52, and a plurality of first connecting rods 55 are annularly installed on the rotating block 54 within the range of 0° to 180°. The number of the first connecting rods 55 is the same as the number of the telescopic support rods 53. An L-shaped connecting rod 56 is rotatably installed on the first connecting rod 55, and the end of the L-shaped connecting rod 56 far from the first connecting rod 55 is connected to the movable end of the telescopic support rod 53 through a second connecting rod 57.

[0036] In the embodiment of the present invention, five telescopic support rods 53 are provided, and the number of the corresponding second support blocks 32 is three, and the included angle between two adjacent telescopic support rods 53 is 45°. During use, while adjusting the distance between the two first support blocks 31, the first support block 31 will synchronously drive the telescopic support rod 53 connected thereto to expand and contract. The telescopic support rod 53 drives the L-shaped connecting rod 56 to swing through the second connecting rod 57. The L-shaped connecting rod 56 drives the rotating block 54 to rotate through the first connecting rod 55, and the rotating block 54 further drives the remaining first connecting rods 55 to rotate, so as to realize the synchronous adjustment of the expansion and contraction amounts of the respective telescopic support rods 53, so that the respective first support blocks 31 and second support blocks 32 are evenly distributed on the same semi-circle, so that the first support blocks 31 and second support blocks 32 are evenly distributed along the inner wall of the arc top of the tunnel, and the arc top of the tunnel can be effectively supported.

[0037] As Figures 4 - 6 As shown in the figure, as a preferred embodiment of the present invention, one end of the protective chain net 33 far from the first winding component 4 is connected to the second winding component 6, and the second winding component 6 is used to keep the protective chain net 33 always in a tensioned state.

[0038] In an embodiment of the present invention, the second winding assembly 6 includes a second installation cavity 61 formed in the first support block 31 or the second support block 32. A second winding roller 62 is installed in the second installation cavity 61. Both ends of the second winding roller 62 are installed on two opposite side walls of the second installation cavity 61 through second installation rings 64. A second motor 63 is installed in the second installation cavity 61. An avoidance cavity matching the second motor 63 is formed at one end of the second winding roller 62. The output end of the second motor 63 is connected to the second winding roller 62. During the telescopic process of the telescopic support rod 53, the distance between the first support block 31 and the second support block 32, or between two adjacent second support blocks 32, will change in real time. Then the length of the protective chain net 33 between the two will also change in real time. In order to always keep the tension of the protective chain net 33 consistent and make the winding degree of the coil spring 71 consistent. During this process, the second motor 63 will drive the second winding roller 62 to rotate in real time, so as to wind and unwind the protective chain net 33, so that the length of the protective chain net 33 can adapt to the position change of the first support block 31 and the second support block 32 in real time.

[0039] Working principle: During use, first adjust the distance between the two first support blocks 31 according to the width of the tunnel, so that the support rods are as close as possible to the edge of the tunnel, and then fix them. At the same time, make the first support block 31 installed on the top of the support rod flush with the lower edge of the tunnel crown. At this time, under the action of the adjustment assembly 5, the first support block 31 and the second support block 32 will support the crown of the tunnel, and the first support block 31 and the second support block 32 will be evenly distributed, making the support more stable. At the same time, the protective chain net 33 in a tensioned state will also play a protective role to prevent gravel and the like from falling from the top of the tunnel. When a relatively large piece of gravel falls on the protective chain net 33, or when there is a lot of gravel accumulated on the protective chain net 33, the protective chain net 33 will elongate, thereby driving the first winding roller 42 to rotate. The first winding roller 42 drives the coil spring 71 to move through the auxiliary connecting rod 77, so that the coil spring 71 contracts. The coil spring 71 makes the insertion rod 72 insert into the positioning slot 74 by squeezing the extrusion plate 76. At this time, the output end of the first motor 43 can drive the connecting shaft 44 to rotate, so as to drive the first winding roller 42 to wind the protective chain net 33 back onto the first winding roller 42. At this time, the protective chain net 33 will tighten, so as to hold the gravel and prevent it from falling. Since the contact between the protective chain net 33 and the gravel is flexible, the impact force of the gravel will not cause great damage to the protective chain net 33, thus effectively avoiding the situation of component damage caused by gravel impact.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel safety support device, including a support part, the support part includes a telescopic support rod, and is characterized in that, Further included are: a support assembly, the support assembly includes two symmetrically arranged first support blocks, an adjustment assembly is connected between the two first support blocks, at least two support rods are installed at the bottom of each first support block, a plurality of second support blocks are equidistantly distributed between the two first support blocks, and each second support block is connected to the adjustment assembly. The adjustment assembly is used to drive each second support block to move synchronously according to the change in the distance between the two first support blocks, and make each first support block and second support block evenly distributed on the same semi-circle. A protective chain net is connected between the first support block and the second support block, and between two adjacent second support blocks; one end of the protective chain net is connected to a first winding assembly, and the protective chain net is only connected to the first winding assembly at one end. The first winding assembly includes a first installation cavity opened in the second support block or the first support block. A first winding roller is installed in the first installation cavity. One end of the protective chain net is wound on the first winding roller, and both ends of the first winding roller are installed on two opposite side walls of the first installation cavity through first installation rings. A first motor is also installed in the first installation cavity, and an avoidance cavity matching the first motor is opened at one end of the first winding roller. A connecting shaft is arranged at one end of the first winding roller close to the first motor, and the connecting shaft is connected to the output end of the first motor through a transmission assembly; the transmission assembly includes a torsion spring sleeved on the connecting shaft, and the torsion spring is connected to the first winding roller through an auxiliary connecting rod. A plurality of insertion rods are annularly installed on the connecting shaft, and the insertion rods are slidably installed in the connecting shaft. The insertion rods are connected to the inside of the connecting shaft through return springs. A positioning slot matching the insertion rod is opened on the output end of the first motor. An extrusion plate is arranged at one end of the insertion rod close to the torsion spring, and the extrusion plate abuts against the torsion spring. A limiting groove matching the extrusion plate is arranged on the side wall of the connecting shaft.

2. The tunnel safety support device according to claim 1, wherein, The support rod includes a support cylinder, a sliding support rod is slidably installed in the support cylinder, and the top of the sliding support rod is connected to the first support block. A fixing assembly for fixing the sliding support rod is also arranged on the support cylinder. A connecting cross bar is connected between two support rods installed at the bottom of the same first support block, and both ends of the connecting cross bar are connected to the support cylinder or the sliding support rod in the support rod through fixing rings.

3. The tunnel safety support device according to claim 2, characterized in that, The fixing assembly includes a positioning bolt installed on the support cylinder, and a plurality of positioning holes matching the positioning bolt are vertically distributed on the sliding support rod.

4. The tunnel safety support device according to claim 1, wherein The adjusting assembly includes a mounting plate, an auxiliary mounting plate is mounted on the mounting plate, a plurality of telescopic support rods are annularly mounted on the auxiliary mounting plate within the range of 0° to 180°, the number of the telescopic support rods is the same as the sum of the number of the first support blocks and the second support blocks, and each telescopic support rod is correspondingly connected to a first support block or a second support block. A rotating block is rotatably mounted on the auxiliary mounting plate, a plurality of first connecting rods are annularly mounted on the rotating block within the range of 0° to 180°, the number of the first connecting rods is the same as the number of the telescopic support rods, an L-shaped connecting rod is rotatably mounted on the first connecting rod, and one end of the L-shaped connecting rod away from the first connecting rod is connected to the movable end of the telescopic support rod through a second connecting rod.

5. The tunnel safety support device according to claim 4, wherein, There are five telescopic support rods.

6. The tunnel safety support device according to claim 1, wherein It further includes a second winding assembly, the second winding assembly is connected to one end of the protective chain net for keeping the protective chain net always in a tensioned state.

7. The tunnel safety support device according to claim 6, characterized in that, The second winding assembly includes a second installation cavity opened in the first support block or the second support block, a second winding roller is installed in the second installation cavity, and both ends of the second winding roller are installed on two opposite side walls of the second installation cavity through second installation rings. A second motor is installed in the second installation cavity, and an avoidance cavity matching the second motor is opened at one end of the second winding roller, and the output end of the second motor is connected to the second winding roller.

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