A safety protection device for tunnel blasting

Abstract

The present invention discloses a safety protection device for tunnel blasting in the field of tunnel blasting technology, comprising a blasting point guard plate and two side baffles fixed to each other to form a vertical protection enclosure with three sides closed and one side open, the two side baffles are mounted on the left and right sides of the blasting point guard plate, and a lifting mechanism, a water storage tank, a protective top plate, protective side plates and a supporting shell are also provided to perform structural protection for tunnel blasting. The height of the protective top plate can be adjusted for tunnels of different heights. The device can be applied to more tunnels of different heights for blasting protection, and is a blasting protection structure with wider adaptability. The device can reduce dust by sprinkling water, thereby removing tunnel dust after blasting as soon as possible, which is convenient for observing the tunnel blasting situation and has a better line of sight. The roller assembly of the device can make the device roll more conveniently, and the spacing between the rollers can be adjusted to suit different road conditions.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel blasting, in particular to a safety protection device for tunnel blasting. Background Art

[0002] Tunnels are the focus and key projects of highway and railway construction. With the development of railway construction and the advancement of science and technology, tunnel excavation methods have been rapidly developed. The more commonly used excavation methods are drilling and blasting, shield method and tunnel boring machine method. Due to the strong adaptability of drilling and blasting to geological conditions and low excavation cost, it is particularly suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels. Therefore, drilling and blasting is still the commonly used tunnel excavation method at home and abroad. There is a close relationship between tunnel excavation methods and tunnel blasting plans. Tunnel excavation methods are mainly based on tunnel geological conditions, mechanical equipment, technical level and engineering The period is determined, and there are generally the following commonly used methods: full-section excavation method, in tunnel construction with good geological conditions, uses a rock drilling rig and a drilling, charging, blocking, and detonating network to complete the excavation of the entire section at one time, and uses ballast loading and transportation machinery to complete the mucking operation; step excavation method is a method of first quickly penetrating the upper half section or arc-shaped pilot pit, or stopping when excavating to a certain mileage, and then using large machinery to expand it to the full section at one time; partial excavation method is a method of first excavating a pilot pit with a small section in the tunnel section, and then gradually expanding it to the designed section in multiple steps.

[0003] Some tunnel blasting protection devices build a frame and fix protection plates outside and on the top of the frame to protect the soil or rock supporting the top of the tunnel, and support the soil or rock on both sides of the tunnel through side plates. However, the width of the movable ground in the tunnel is different. Some of these protection devices are equipped with rollers at the bottom. If the width of the movable ground is not enough, the roller spacing is not wide enough, and it will be blocked and difficult to push, which is not convenient for the movement of the safety protection device. During blasting, the safety protection device only relies on the sliding wheel to contact the ground, resulting in a small contact area between the safety protection device and the ground, making the stability of the safety protection device poor. The supporting strength of the roller is insufficient, and it is easy to move when subjected to the impact of blasting, which is not convenient for protection. At the same time, a large amount of dust will be generated during blasting, which will affect the health of the workers, affect the workers' vision, and cause inconvenience.

[0004] Based on this, the present invention designs a safety protection device for tunnel blasting to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a safety protection device for tunnel blasting, which can adjust the height of the protective top plate for tunnels of different heights. The device can be used for blasting protection in tunnels of more different heights, and is a blasting protection structure with wider adaptability. The device can reduce dust by sprinkling water, thereby removing tunnel dust after blasting as soon as possible, making it easier to observe the tunnel blasting situation and providing better vision. The roller assembly of the device can make the device roll more conveniently, and can adjust the spacing between the rollers to adapt to different road conditions.

[0006] The present invention is implemented as follows: a safety protection device for tunnel blasting, comprising:

[0007] A burst point guard plate and two side baffles are fixed to each other to form a vertical protective enclosure with three sides closed and one side open, the two side baffles are mounted on the left and right sides of the burst point guard plate, and the tops of the burst point guard plate and the side baffles are also horizontally fixed with a supporting top plate, and the supporting top plate completely blocks the enclosure range of the burst point guard plate and the side baffles;

[0008] A lifting mechanism is stably mounted on the supporting top plate and is covered with a supporting shell on the outside;

[0009] A water storage tank is fixedly mounted above the supporting shell, and a circle of spray pipes is arranged outside. The inner cavity of the water storage tank is connected to the spray pipes through a water pipe and a sprinkler pump. A plurality of nozzles are evenly distributed on the outer ring of the spray pipe, and each of the nozzles is connected to the inner cavity of the spray pipe.

[0010] A protective top plate is installed on the top of the lifting mechanism and can be raised and lowered by the lifting mechanism to block the water tank;

[0011] The protective side plate is a vertically arranged protective plate, which is vertically shielded on the outside of the side baffle without contact, and a protective side plate is installed on the outside of each side baffle, and a protective spring elastic buffer is provided between the side baffles and the protective side plates;

[0012] A support shell is installed at the bottom of each inner wall of the two side baffles, a roller assembly is installed under each support shell, and at least two stabilizing blocks are installed inside each support shell so as to be able to be raised and lowered. The two stabilizing blocks are arranged on both sides of the roller assembly, and the stabilizing blocks and the roller assembly do not interfere with each other.

[0013] Furthermore, the lifting mechanism includes an adjusting screw, an adjusting motor, a transmission gear, a positioning column, a transmission chain, a lifting plate and a lifting column;

[0014] The four adjusting screws are vertically arranged parallel to each other, and the four adjusting screws are distributed in a rectangular shape on the same horizontal plane. The driving shaft of the adjusting motor is locked with an adjusting screw, and each adjusting screw is provided with a transmission gear. The four adjusting screws rotate synchronously through the transmission gear and the transmission chain.

[0015] Two adjusting screws are vertically mounted on each of the supporting shells, and the four adjusting screws are symmetrically arranged on the two supporting shells, and both ends of each adjusting screw are rotatably arranged between the top of the inner cavity of the supporting shell and the top of the supporting shell through bearings;

[0016] The adjusting screw is a straight rod with a continuous one-way thread on the rod body;

[0017] Three positioning columns are also fixed on each of the support shells, and each of the positioning columns is vertically fixed between the support shell and the support top plate;

[0018] A lifting plate is also arranged above each of the supporting shells, and the lifting plate is threadedly mounted on an adjusting screw on the same supporting shell, and the adjusting screw is inserted into a screw hole provided on the lifting plate, and two lifting columns are vertically fixed on each of the lifting plates, and each of the adjusting screws, positioning columns and lifting columns are parallel to each other.

[0019] Furthermore, a buffer assembly is provided between the protective top plate and the lifting mechanism, and the buffer assembly includes a buffer sleeve, a fixing plate, a fixing column and a buffer spring;

[0020] The fixed column, buffer spring and buffer sleeve form a shock absorber structure, the fixed plate is a horizontally arranged flat plate, the four fixed columns are vertically fixed on the top of the same fixed plate, a buffer sleeve is slidably sleeved on the top of each fixed column, a buffer spring is arranged between the top of each fixed column and the sleeved buffer sleeve, the top of each lifting column extends out of the top of the supporting shell, and each fixed plate is fixed on the tops of two lifting columns on the same lifting plate; the four buffer sleeves on each buffer assembly are fixedly connected to the lower bottom surface of the protective top plate;

[0021] A buffer component is installed on each of the left and right sides of the protective top plate, and each of the buffer components is arranged directly above the supporting shell.

[0022] Further, the bottom of the support shell is a support base plate, two limit columns are vertically fixed between the top of the inner cavity of the support shell and the top of the support base plate, a support plate is horizontally arranged inside the support shell, the support plate is slidably arranged on the limit columns, and a lifting cylinder is vertically fixed between the top of the inner cavity of the support shell and the top of the support plate;

[0023] A plurality of lifting struts are evenly fixed at the bottom of the support plate, and the lower ends of the lifting struts extend below the support bottom plate. Two stabilizing blocks and a roller assembly are arranged below each of the support bottom plates, and the two stabilizing blocks are not in contact with the roller assembly.

[0024] The lifting strut passes through the supporting bottom plate, and the lifting strut is clearance-matched with the through-hole of the supporting bottom plate, and the length of the lifting strut is greater than the height of the roller assembly.

[0025] Furthermore, the roller assembly includes a roller housing, a roller motor, a threaded adjustment column, a sliding plate, a limit plate and a roller;

[0026] The roller housing is a square frame structure with openings at the top and the bottom. The threaded adjustment column is rotatably installed horizontally inside the roller housing through a bearing. The two limit plates are parallelly installed horizontally inside the roller housing. The axes of the threaded adjustment column and the two limit plates are parallel to each other, and the two limit plates are symmetrically arranged on both sides of the threaded adjustment column. The two sliding plates are horizontally slidably arranged on the limit plates. The two sliding plates are movably connected to the threaded adjustment column through threads, and the threaded adjustment column is connected to the driving shaft of the roller motor.

[0027] A plurality of rollers are evenly installed on the bottom of the sliding plate.

[0028] Furthermore, a buffer frame is fixedly installed on the inner side of the two side baffles;

[0029] A plurality of side plate connecting columns are evenly fixed on the protective side plate in a rectangular shape, and the side plate connecting columns pass through the side baffle plate and are fixed to the buffer frame, and each of the side plate connecting columns is slidably arranged in a hole of the side baffle plate, and the buffer frame is a fence-like frame structure;

[0030] A plurality of protective springs are evenly arranged between the protective side plate and the side baffle plate, and both ends of the protective springs are locked with the side baffle plate and the protective side plate;

[0031] The side baffles, protective side panels, side panel connecting columns and buffer frames on both sides are of the same assembly structure;

[0032] The protective side plates, side baffles and buffer frames are all arranged vertically and parallel to each other.

[0033] Furthermore, the side baffles on both sides are parallel to each other, and the two side baffles are perpendicular to the explosion point guard plate;

[0034] The protective top plate is an arched protective plate, and the protective top plate, side baffles, protective side plates and explosion point protective plates are all steel plates.

[0035] The beneficial effects of the present invention are as follows: 1. The present invention connects the protective top plate and the lifting device so that the protective top plate of the device can be lifted and lowered in the tunnel, so that it can fit the tunnel better and play a protective role, so that the protective top plate is as close to the tunnel top as possible, shortening the distance between the top of the safety protection device and the tunnel top, reducing the impact force on the top of the safety protection device, and making the protection effect of the safety protection device better. In addition, the protective top plate of the device is connected to the buffer sleeve, so that the device can effectively buffer the impact and gravel on the top, reduce the hard impact force, and make the protection effect of the top better;

[0036] 2. The device is equipped with a water tank, a sprinkler pump and a nozzle, which can spray water around the device, so as to sprinkle water to reduce the dust generated by the blasting, avoid the dust from damaging the health of the staff, prevent the staff from affecting their work, and avoid dust from affecting their vision;

[0037] 3. The rollers at the bottom of the roller assembly of the device can be adjusted in spacing through the threaded adjustment column, so that the rollers at the bottom of the device that are easy to move can adapt to the ground of different widths, which is convenient for the movement of the safety protection device and expands the scope of application of the safety protection device. A lifting and lowering stabilizing block is also installed at the bottom, which supports the device alternately through lifting and lowering and the roller assembly, so that when the device is supporting and protecting, the stabilizing block is used for stable support, and when it needs to be moved, the stabilizing block is retracted to expose the rollers for supporting and rolling, which is convenient to move and has strong stability during protection;

[0038] 4. Protective side plates are installed on the sides of the device, and the protective side plates are elastically installed on the outside of the side baffles. They are buffered by protective springs, which can tightly buffer the impact of gravel on the sides and effectively reduce the impact force, thereby providing better blasting protection. It is not just a hard support, but absorbs the impact energy through the protective springs, and has a better anti-slip effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the front structure of the present invention;

[0042] Figure 3 It is a schematic diagram of the protective surface structure of the explosion point guard plate of the present invention;

[0043] Figure 4 It is a schematic diagram of the structure of the roller assembly of the present invention;

[0044] Figure 5 This is a schematic diagram of the internal structure of a support shell of the present invention;

[0045] Figure 6 This is a schematic diagram of the internal structure of the lifting mechanism of the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of the buffer frame of the present invention;

[0047] Figure 8 This is a schematic diagram of the external connection relationship of the lifting mechanism of the present invention;

[0048] Fig. 9 This is a schematic diagram of the connection relationship of the buffer sleeve of the present invention;

[0049] Fig.10 This is a schematic diagram of the internal structure of the buffer sleeve of the present invention;

[0050] Fig.11 It is a top view of the water storage tank of the present invention.

[0051] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0052] 1-protective top plate, 11-buffer sleeve, 12-fixed plate, 13-fixed column, 14-buffer spring, 2-lifting mechanism, 21-support shell, 22-adjusting screw, 23-adjusting motor, 24-transmission gear, 25-positioning column, 26-transmission chain, 27-lifting plate, 28-lifting column, 3-water tank, 31-spraying pipe, 32-nozzle, 33-support column, 34-water pipe, 35-sprinkler pump, 4-side baffle, 41-protective side plate , 42-support top plate, 43-protective spring, 44-side plate connecting column, 45-buffer frame, 451-cross plate, 452-vertical support rod, 5-support shell, 51-support plate, 52-lifting cylinder, 53-limiting column, 54-lifting support rod, 55-support bottom plate, 56-stabilizing block, 6-roller assembly, 61-roller shell, 62-roller motor, 63-threaded adjustment column, 64-sliding plate, 65-limiting plate, 66-roller, 7-explosion point guard plate. DETAILED DESCRIPTION

[0053] See also Figures 1 to 11 As shown, the present invention provides a technical solution: a safety protection device for tunnel blasting, comprising:

[0054] A burst point guard plate 7 and two side baffles 4 are fixed to each other to form a vertical protective enclosure with three sides closed and one side open. The two side baffles 4 are mounted on the left and right sides of the burst point guard plate 7. The tops of the burst point guard plate 7 and the side baffles 4 are also horizontally fixed with a support top plate 42, and the support top plate 42 completely blocks the enclosure range of the burst point guard plate 7 and the side baffles 4.

[0055] The lifting mechanism 2 is stably mounted on the supporting top plate 42 and is covered with a supporting shell 21;

[0056] The water tank 3 is fixedly mounted above the supporting shell 21, and a circle of spray pipes 31 are arranged outside. The inner cavity of the water tank 3 is connected to the spray pipe 31 through a water pipe 34 and a water pump 35. A plurality of nozzles 32 are evenly distributed on the outer ring of the spray pipe 31, and each of the nozzles 32 is connected to the inner cavity of the spray pipe 31;

[0057] A protective top plate 1 is installed on the top of the lifting mechanism 2 and can be raised and lowered by the lifting mechanism 2 to block the water tank 3;

[0058] The protective side plate 41 is a vertically arranged protective plate, which is vertically shielded on the outside of the side baffle 4 without contact, and a protective side plate 41 is installed on the outside of each side baffle 4, and a protective spring 43 is used for elastic buffering between the side baffle 4 and the protective side plate 41;

[0059] A support shell 5 is installed at the bottom of each inner wall of the two side baffles 4, a roller assembly 6 is installed under each support shell 5, and at least two stabilizing blocks 56 are installed inside each support shell 5 so as to be liftable. The two stabilizing blocks 56 are arranged on both sides of the roller assembly 6, and the stabilizing blocks 56 and the roller assembly 6 do not interfere with each other, and can adjust the height of the protective top plate 1 for tunnels of different heights. The device can be used for blasting protection in tunnels of more different heights, and is a blasting protection structure with wider adaptability. The device can reduce dust by sprinkling water, thereby removing tunnel dust after blasting as soon as possible, which is convenient for observing the tunnel blasting situation and has a better line of sight. The roller assembly 6 of the device can make the device more convenient to roll, and can adjust the spacing between the rollers 66 to adapt to different road conditions.

[0060] The lifting mechanism 2 includes an adjusting screw 22, an adjusting motor 23, a transmission gear 24, a positioning column 25, a transmission chain 26, a lifting plate 27 and a lifting column 28;

[0061] The four adjusting screws 22 are vertically arranged parallel to each other, and the four adjusting screws 22 are distributed in a rectangular shape on the same horizontal plane. The driving shaft of the adjusting motor 23 is locked and connected with an adjusting screw 22. A transmission gear 24 is arranged on each adjusting screw 22, and the four adjusting screws 22 rotate synchronously through the transmission gear 24 and the transmission chain 26.

[0062] Two adjusting screws 22 are vertically mounted on each of the supporting shells 5, and the four adjusting screws 22 are symmetrically arranged on the two supporting shells 5, and both ends of each adjusting screw 22 are rotatably arranged between the top of the inner cavity of the supporting shell 21 and the top of the supporting shell 5 through bearings;

[0063] The adjusting screw 22 is a straight rod with a continuous one-way thread on the rod body;

[0064] Three positioning columns 25 are also fixed on each of the support shells 5, and each of the positioning columns 25 is vertically fixed between the support shell 5 and the support top plate 42;

[0065] A lifting plate 27 is also provided above each of the support shells 5. The lifting plate 27 is threadedly mounted on the adjusting screw 22 on the same support shell 5. The adjusting screw 22 is inserted into a screw hole provided on the lifting plate 27. Two lifting columns 28 are also vertically fixed on each of the lifting plates 27. Each of the adjusting screw 22, the positioning column 25 and the lifting column 28 are parallel to each other. The device can be used to adjust the height of the entire protective top plate 1, and can adjust the gap with the tunnel top to reduce the impact distance.

[0066] A buffer assembly is also provided between the protective top plate 1 and the lifting mechanism 2, and the buffer assembly includes a buffer sleeve 11, a fixing plate 12, a fixing column 13 and a buffer spring 14;

[0067] The fixed column 13, the buffer spring 14 and the buffer sleeve 11 form a shock absorber structure, the fixed plate 12 is a horizontally arranged flat plate, the four fixed columns 13 are vertically fixed on the top of the same fixed plate 12, a buffer sleeve 11 is slidably mounted on the top of each fixed column 13, a buffer spring 14 is arranged between the top of each fixed column 13 and the mounted buffer sleeve 11, the top of each lifting column 28 extends out of the top of the support shell 21, and each fixed plate 12 is fixed to the top of two lifting columns 28 on the same lifting plate 27; the four buffer sleeves 11 on each buffer assembly are fixedly connected to the lower bottom surface of the protective top plate 1;

[0068] A buffer assembly is installed on each of the left and right sides of the protective top plate 1, and each of the buffer assemblies is arranged directly above the supporting shell 5. Through such a structure, the impact force on the top can be buffered and the impact force can be effectively absorbed;

[0069] The bottom of the support shell 5 is a support bottom plate 55, and two limit columns 53 are vertically fixed between the top of the inner cavity of the support shell 5 and the top of the support bottom plate 55. A support plate 51 is horizontally arranged inside the support shell 5, and the support plate 51 is slidably arranged on the limit columns 53. A lifting cylinder 52 is vertically fixed between the top of the inner cavity of the support shell 5 and the top of the support plate 51;

[0070] A plurality of lifting struts 54 are evenly fixed at the bottom of the support plate 51, and the lower ends of the lifting struts 54 extend below the support bottom plate 55. Two stabilizing blocks 56 and a roller assembly 6 are arranged below each of the support bottom plates 55, and the two stabilizing blocks 56 are not in contact with the roller assembly 6; the two stabilizing blocks 56 are symmetrically arranged on the left and right sides of the roller assembly 6.

[0071] The lifting strut 54 passes through the supporting bottom plate 55, and the lifting strut 54 and the through-holes of the supporting bottom plate 55 are clearance-matched, and the length of the lifting strut 54 is greater than the height of the roller assembly 6. By supporting the entire device in the supporting shell 5 or exposing the roller 66 for movement, the heavy-weight device can be switched between supporting and moving, and the adjustment is convenient;

[0072] The roller assembly 6 includes a roller housing 61, a roller motor 62, a threaded adjustment column 63, a sliding plate 64, a limit plate 65 and a roller 66;

[0073] The roller housing 61 is a square frame structure with upper and lower openings. The threaded adjustment column 63 is rotatably installed horizontally inside the roller housing 61 through a bearing. The two limit plates 65 are installed horizontally in parallel inside the roller housing 61. The axes of the threaded adjustment column 63 and the two limit plates 65 are parallel to each other, and the two limit plates 65 are symmetrically arranged on both sides of the threaded adjustment column 63. The two sliding plates 64 are horizontally slidably arranged on the limit plates 65. The two sliding plates 64 are movably connected to the threaded adjustment column 63 through threads, and the threaded adjustment column 63 is connected to the driving shaft of the roller motor 62.

[0074] The plurality of rollers 66 are evenly mounted on the bottom of the sliding plate 64. The roller assembly 6 allows the spacing between the rollers 66 of the device to be adjusted, so that the width can be easily adjusted and the device can be applied to roads of different widths, so that the device can reach the blasting point more conveniently.

[0075] A buffer frame 45 is fixedly installed on the inner side of the two side baffles 4;

[0076] A plurality of side plate connecting columns 44 are evenly fixed on the protective side plate 41 in a rectangular shape. The side plate connecting columns 44 pass through the side baffle plate 4 and are fixed to the buffer frame 45. Each of the side plate connecting columns 44 is slidably disposed in a hole of the side baffle plate 4. The buffer frame 45 is a fence-like frame structure.

[0077] A plurality of protective springs 43 are evenly arranged between the protective side plate 41 and the side baffle 4, and both ends of the protective spring 43 are locked with the side baffle 4 and the protective side plate 41;

[0078] The side baffles 4, protective side panels 41, side panel connecting columns 44 and buffer frames 45 on both sides are of the same assembly structure;

[0079] The protective side plate 41, the side baffle plate 4 and the buffer frame 45 are all arranged vertically and parallel to each other. Through the buffering of the protective side plate 41, the side protection effect of the device is better, and it can effectively buffer and absorb energy, and the gravel is not easy to splash;

[0080] The side baffles 4 on both sides are parallel to each other, and the two side baffles 4 are perpendicular to the explosion point guard plate 7;

[0081] The protective top plate 1 is an arched protective plate. The protective top plate 1, the side baffles 4, the protective side plates 41 and the explosion point protective plates 7 are all steel plates, which ensure good protective effect and high strength.

[0082] In a specific embodiment of the present invention:

[0083] The embodiment of the present invention provides a safety protection device for tunnel blasting, and the technical problems solved by the present invention are: 1. The existing protection device is difficult to move in the tunnel. When the tunnel is blasted, the road surface is complicated, the width is different, and it is difficult to repair. It is difficult to move the existing protection device because the protection device of the blasting tunnel is large and heavy, so that the entire tunnel can be supported, but it is too difficult to move such a protection device; 2. The existing protection devices are hard-connected and can only resist rigidly during protection. The gravel has no buffering and is easy to scatter and break, splashing and injuring people; 3. The current protection devices rely on flat plates and frames for protection, without lifting adjustment, no buffering protection, simple functions, and poor protection effect.

[0084] The technical effect achieved is: the present invention connects the protective top plate 1 and the lifting mechanism 2 so that the protective top plate 1 of the device can be lifted and lowered in the tunnel, so that it can fit the tunnel better and play a protective role, so that the protective top plate 1 is as close to the tunnel top as possible, shortening the distance between the top of the safety protection device and the tunnel top, reducing the impact force on the top of the safety protection device, and the protective top plate 1 of the device is connected to the buffer sleeve, so that the device can effectively buffer the impact and gravel on the top, reduce the hard impact force, and make the top protection effect better;

[0085] 2. The device is equipped with a water storage tank 3, a water pump 35 and a nozzle 32, which can spray water around the spray pipe 31 of the device, so as to spray water to reduce the dust generated by the blasting, avoid the dust from damaging the health of the workers, prevent the workers from affecting their work, and avoid the dust from affecting their sight;

[0086] 3. The roller 66 at the bottom of the roller assembly 6 of the device can be adjusted in spacing by means of a threaded adjustment column 63, so that the roller 66 at the bottom of the device can be adapted to different widths of the ground, which is convenient for the movement of the safety protection device and expands the applicable scope of the safety protection device. A lifting and lowering stabilizing block 56 is also installed at the bottom. The device is alternately supported by lifting and lowering the stabilizing block 56 and the roller assembly 6, so that when the device is supporting and protecting, the stabilizing block 56 is used for stable support, and when it needs to be moved, the stabilizing block 56 is retracted to expose the roller 66 for supporting and rolling, which is convenient to move and has strong stability during protection;

[0087] 4. A protective side plate 41 is installed on the side of the device, and the protective side plate 41 is elastically installed on the outside of the side baffle 4. It is buffered by a protective spring 43, which can tightly buffer the impact of gravel on the side and effectively reduce the impact force, thereby providing better blasting protection. It is not just a hard support, but the protective spring 43 absorbs the impact energy, and the anti-slip effect is better.

[0088] The technical solution in the embodiment of the present invention is to solve the above problems, and the overall idea is as follows:

[0089] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0090] When making the present invention, a frame is first made, and a bursting point guard plate 7 and two side baffles 4 are fixed to each other to form a vertical protective enclosure with three closed sides and one open side, and the bursting point guard plate 7 is fixed between the two side baffles 4, and the planes where the bursting point guard plate 7 and the side baffles 4 are located are perpendicular to each other to form a vertical enclosure, and then a support top plate 42 is fixed on the top of the three-sided enclosure to ensure that the support top plate 42 covers the empty space at the top of the three-sided enclosure composed of the bursting point guard plate 7 and the side baffles 4, and then a lifting mechanism 2 is installed on the top of the support top plate 42, and four adjusting screws 22 are installed inside the lifting mechanism 2. The four adjusting screws 22 are vertically arranged, and a supporting shell 5 is fixed to the inner side of the bottom of the side baffles 4 on both sides, and the left and right supporting shells 5 are symmetrically arranged, and then the tops of the four adjusting screws 22 are rotatably installed in the inner cavity of the supporting shell 21 through bearings, and the bottoms of the adjusting screws 22 are installed on the top of the supporting shell 5 through bearings to ensure that the adjusting screws 5 can rotate vertically. Two adjusting screws 22 are installed on the top of each supporting shell 5, and then a lifting plate 27 is installed on the two adjusting screws 22 on the same side, and three positioning columns 25 are also installed on the same side to guide the lifting of the lifting plate 27, and lifting columns 28 are vertically fixed at the front and rear ends of the same lifting plate 27, the lower end of the lifting column 28 is fixed on the lifting plate 27, the top end is fixed to the bottom of the fixed plate 12, and then the fixed column 13 is connected through the fixed plate 12, and is slid up and down through the fixed column 13 and the buffer spring 14. It is sleeved in the buffer sleeve 11 and fixedly connected to the protective top plate 1 through the buffer sleeve 11, and a group of buffer sleeves 11 is fixed on the left and right sides of a protective top plate 1, and a group of buffer sleeves 11 has four, and the four buffer sleeves 11 are assembled together on the same fixed plate 12 to form a larger contact area, so as to perform buffering, and the two fixed plates 12 on both sides of the protective top plate 1 are respectively connected to the four lifting columns 28 on both sides;

[0091] The above is the external connection relationship of the lifting mechanism 2, and the structure inside the lifting mechanism 2 is Figure 6 As shown, transmission gears 24 are fixed on the four adjusting screws 22, and the transmission gears 24 are synchronously driven through the transmission chain 26. The top of one of the adjusting screws 22 is driven by the adjusting motor 23, so that all the adjusting screws 22 can be driven to rotate synchronously together, and the transmission and driving devices inside the lifting mechanism 2 are enclosed by a supporting shell 21 for protection;

[0092] Then, a water storage tank 3 is installed on the top of the supporting shell 21. A water pump 35 is arranged inside the water storage tank 3. Then, the water pump 35 is connected to a water delivery pipe 34. The water delivery pipe 34 is connected to an external spray pipe 31. The spray pipe 31 surrounds the periphery of the water storage tank 3. A plurality of nozzles 32 are evenly distributed on the outer circle of the spray screen pipe 31. The number of nozzles 32 is not less than 20. The nozzles 32 are atomizing nozzles.

[0093] The spray pipe 31 is fixedly mounted on the top of the support top plate 42 through a plurality of support columns 33. The spray pipe 31 is located directly above the edge of the support top plate 42, and has the same shape and size as the edge of the support top plate 42, so as to facilitate spraying water mist.

[0094] Then, a buffer frame 45 is installed on the inner side of the two side baffles 4. The buffer frame 45 is a fence-like frame structure formed by interlacing and fixing multiple horizontal plates 451 and vertical support rods 452. The side plate connecting column 44 is horizontally inserted through the holes on the side baffles 4. The side plate connecting column 44 is fixedly connected to the horizontal plate 451.

[0095] Then, a protective side plate 41 is fixed on the outside of the side plate connecting column 44. The protective side plate 41 is a whole steel flat plate for effective protection. A plurality of protective springs 43 are evenly arranged between the protective side plate 41 and the side baffle 4 to buffer and absorb the impact of the protective side plate 41.

[0096] Then, a support shell 5 is manufactured. The bottom of the support shell 5 is a support base plate 55. Two limit columns 53 are vertically fixed between the top of the inner cavity of the support shell 5 and the top of the support base plate 55. A support plate 51 is horizontally arranged inside the support shell 5. The support plate 51 is slidably arranged on the limit columns 53. A lifting cylinder 52 is vertically fixed between the top of the inner cavity of the support shell 5 and the top of the support plate 51.

[0097] A plurality of lifting struts 54 are evenly fixed at the bottom of the support plate 51, and the lower ends of the lifting struts 54 extend below the support bottom plate 55. Two stabilizing blocks 56 are arranged below each of the support bottom plates 55, and the two stabilizing blocks 56 are not in contact with the roller assembly 6;

[0098] The lifting strut 54 passes through the supporting bottom plate 55 , and the lifting strut 54 and the through hole of the supporting bottom plate 55 are clearance-matched, and the length of the lifting strut 54 is greater than the height of the roller assembly 6 .

[0099] The roller assembly 6 includes a roller housing 61, a roller motor 62, a threaded adjustment column 63, a sliding plate 64, a limit plate 65 and a roller 66;

[0100] The roller housing 61 is a square frame structure with upper and lower openings. The threaded adjustment column 63 is rotatably installed horizontally inside the roller housing 61 through a bearing. The two limit plates 65 are installed horizontally in parallel inside the roller housing 61. The axes of the threaded adjustment column 63 and the two limit plates 65 are parallel to each other, and the two limit plates 65 are symmetrically arranged on both sides of the threaded adjustment column 63. The two sliding plates 64 are horizontally slidably arranged on the limit plates 65. The two sliding plates 64 are movably connected to the threaded adjustment column 63 through threads, and the threaded adjustment column 63 is connected to the driving shaft of the roller motor 62.

[0101] The plurality of rollers 66 are evenly mounted on the bottom of the sliding plate 64.

[0102] When the present invention is in use, the protective top plate 1 is adjusted and lowered by the lifting mechanism 2. The adjustment process is to rotate the adjustment motor 23, and then drive the transmission gear 24 and the transmission chain 26 to rotate together, ensuring that all the adjustment screws 22 rotate synchronously, so that the lifting plate 27 is forced by the thread to vertically descend along the positioning column 25, and then the entire lifting column 28 is also descended together, thereby driving the buffer assembly to descend together, and the protective top plate 1 is connected to the buffer assembly, and the height is lowered together with the buffer sleeve 11, so that the device can enter the lower tunnel cave for protection;

[0103] When blasting is required, the distance between the rollers 66 is adjusted according to the actual road conditions inside the tunnel to adapt to road conditions of different widths. When adjusting, the roller motor 62 needs to be started, and the roller motor 62 drives the threaded adjustment column 63 to rotate. The threaded adjustment column 63 rotates on the horizontal axis of the roller housing 61, and the thread thereon forces the sliding plate 64 to rotate with the thread, while the sliding plate 64 itself cannot rotate and can only rotate relative to the threaded adjustment column 63. Therefore, the rotation of the threaded adjustment column 63 will drive the two sliding plates 64 to slide on the limit plate 65 in the front and rear directions, and all the rollers 66 are locked and installed at the bottom of the sliding plate 64, so at the same time When the position of the two sliding plates 64 on a threaded adjustment column 63 changes relative to each other, the distance between the rollers 66 also changes. It should be noted that the thread directions of the two sliding plates 64 of the same threaded adjustment column 63 are opposite, so that when the threaded adjustment column 63 rotates in the same direction, the translation directions of the two sliding plates 64 thereon are opposite; therefore, when the threaded adjustment column 63 rotates clockwise, the distance between the two sliding plates 64 becomes larger, and conversely, when it rotates counterclockwise, the distance between the two sliding adjustment plates 64 becomes smaller; and the entire roller assembly 6 needs to be installed one on each inner side of the two side baffles 4 to stably support and roll the device;

[0104] The function of the support shell 5 is to provide stable support. The lifting cylinder 52 is activated to lift the entire support plate 51, thereby driving the lifting support rod 54 and the stabilizing block 56 to be lifted and retracted into the support shell 5, exposing the roller assembly 6, and allowing the device to rest against the wall where explosives are buried. The device can support the tunnel being blasted, protect the tunnel from gravel, and avoid unplanned collapse.

[0105] After the device is moved to the blasting site, the blasting point guard plate 7 is facing the blasting point, and the lifting cylinder 52 is started to extend the stabilizing block 56 of the device, so that the roller assembly 6 is suspended in the air, and the stabilizing block 56 is supported. The thickness and strength of the stabilizing block 56 need to be sufficient to support the overall weight of the device and the maximum blasting strength, so as to protect the blasting point;

[0106] The regulating motor 23 is a bidirectional motor. The regulating motor 23 rotates in the reverse direction to drive the lifting plate 27 to raise it, and the protective top plate 1 is raised through the lifting mechanism 2 to be as close to the top of the tunnel as possible, thereby reducing the impact distance and the impact force.

[0107] The exploded rubble is protected by the protective top plate 1, the explosion point guard plate 7, and the protective side plates 41 on the left and right sides. When the rubble hits the protective top plate 1, the impact force is buffered and absorbed by the buffer spring 14, and the impact on the side is buffered by the protective spring 43. The protective side plate 41 squeezes the protective spring 43, and then the side baffle 4 is stressed, so the buffering effect is better.

[0108] At the same time, the water pump 35 is started, and water is sprayed along the spray pipe 31 and the nozzle 32 to the surroundings of the device to perform dust reduction operations.

[0109] The inner and outer sides of the device are the protected center as the inner side, and the side that contacts the tunnel as the outer side, that is, the inside surrounded by the explosion point guard plate 7 and the two side baffles 4 is the inner side, and the outside is blocked as the outer side.

[0110] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A safety protection device for tunnel blasting, characterized in that: include: A burst point guard plate (7) and two side baffles (4) are fixed to each other to form a vertical protective enclosure with three closed sides and one open side, the two side baffles (4) are mounted on the left and right sides of the burst point guard plate (7), and the tops of the burst point guard plate (7) and the side baffles (4) are also horizontally fixed with a supporting top plate (42), and the supporting top plate (42) completely blocks the enclosure range of the burst point guard plate (7) and the side baffles (4); A lifting mechanism (2) is stably mounted on the supporting top plate (42) and is covered with a supporting shell (21); A water storage tank (3) is fixedly mounted above the supporting shell (21), and is surrounded by a circle of spray pipes (31). The inner cavity of the water storage tank (3) is connected to the spray pipe (31) through a water pipe (34) and a water pump (35). A plurality of nozzles (32) are evenly distributed on the outer ring of the spray pipe (31), and each of the nozzles (32) is connected to the inner cavity of the spray pipe (31); A protective top plate (1) is installed on the top of the lifting mechanism (2) and can be raised and lowered by the lifting mechanism (2) to block the water tank (3) directly above the water tank; The protective side plate (41) is a vertically arranged protective plate, which is vertically shielded on the outside of the side baffle (4) without contact, and a protective side plate (41) is installed on the outside of each side baffle (4), and a protective spring (43) is used to elastically buffer between the side baffle (4) and the protective side plate (41); A support shell (5), wherein a support shell (5) is installed at the bottom of each inner side wall of the two side baffles (4), a roller assembly (6) is installed below each support shell (5), and at least two stabilizing blocks (56) are installed inside each support shell (5) so as to be able to be lifted and lowered, and the two stabilizing blocks (56) are arranged on both sides of the roller assembly (6), and the stabilizing blocks (56) and the roller assembly (6) do not interfere with each other; The lifting mechanism (2) comprises an adjusting screw (22), an adjusting motor (23), a transmission gear (24), a positioning column (25), a transmission chain (26), a lifting plate (27) and a lifting column (28); The four adjusting screws (22) are vertically arranged in parallel with each other, and the four adjusting screws (22) are distributed in a rectangular shape on the same horizontal plane. The driving shaft of the adjusting motor (23) is locked and connected with an adjusting screw (22). A transmission gear (24) is arranged on each adjusting screw (22), and the four adjusting screws (22) rotate synchronously through the transmission gear (24) and the transmission chain (26); Two adjusting screws (22) are vertically mounted on each of the supporting shells (5), and the four adjusting screws (22) are symmetrically arranged on the two supporting shells (5), and both ends of each adjusting screw (22) are rotatably arranged between the top of the inner cavity of the supporting shell (21) and the top of the supporting shell (5) through bearings; The adjusting screw (22) is a straight rod with a shaft covered with continuous one-way threads; Three positioning columns (25) are also fixed on each of the support shells (5), and each of the positioning columns (25) is vertically fixed between the support shell (5) and the support top plate (42); A lifting plate (27) is also arranged above each of the supporting shells (5), and the lifting plate (27) is screwed onto an adjusting screw (22) on the same supporting shell (5), and the adjusting screw (22) is inserted into a screw hole provided on the lifting plate (27). Two lifting columns (28) are also vertically fixed on each of the lifting plates (27), and each of the adjusting screw (22), the positioning column (25) and the lifting column (28) are parallel to each other; The bottom of the support shell (5) is a support base plate (55), two limit columns (53) are vertically fixed between the top of the inner cavity of the support shell (5) and the top of the support base plate (55), a support plate (51) is horizontally arranged inside the support shell (5), the support plate (51) is slidably arranged on the limit columns (53), and a lifting cylinder (52) is vertically fixed between the top of the inner cavity of the support shell (5) and the top of the support plate (51); A plurality of lifting struts (54) are evenly fixed to the bottom of the support plate (51), the lower ends of the lifting struts (54) extend below the support bottom plate (55), two stabilizing blocks (56) and a roller assembly (6) are arranged below each of the support bottom plates (55), and the two stabilizing blocks (56) are not in contact with the roller assembly (6); The lifting support rod (54) passes through the supporting bottom plate (55), and the lifting support rod (54) and the through hole of the supporting bottom plate (55) are clearance-matched, and the length of the lifting support rod (54) is greater than the height of the roller assembly (6).

2. A safety protection device for tunnel blasting according to claim 1, characterized in that: A buffer assembly is also provided between the protective top plate (1) and the lifting mechanism (2), and the buffer assembly comprises a buffer sleeve (11), a fixing plate (12), a fixing column (13) and a buffer spring (14); The fixed column (13), the buffer spring (14) and the buffer sleeve (11) form a shock absorber structure. The fixed plate (12) is a horizontally arranged flat plate. The four fixed columns (13) are vertically fixed on the top of the same fixed plate (12). A buffer sleeve (11) is slidably mounted on the top of each fixed column (13). A buffer spring (14) is arranged between the top of each fixed column (13) and the mounted buffer sleeve (11). The top of each lifting column (28) extends out of the top of the supporting shell (21). Each fixed plate (12) is fixed to the top of two lifting columns (28) on the same lifting plate (27); the four buffer sleeves (11) on each buffer assembly are fixedly connected to the lower bottom surface of the protective top plate (1). A buffer component is installed on each of the left and right sides of the protective top plate (1), and each of the buffer components is arranged directly above the supporting shell (5).

3. A safety protection device for tunnel blasting according to claim 1, characterized in that: The roller assembly (6) comprises a roller housing (61), a roller motor (62), a threaded adjustment column (63), a sliding plate (64), a limiting plate (65) and a roller (66); The roller housing (61) is a square frame structure with upper and lower openings. The threaded adjustment column (63) is rotatably installed horizontally inside the roller housing (61) through a bearing. The two limit plates (65) are installed horizontally in parallel inside the roller housing (61). The axes of the threaded adjustment column (63) and the two limit plates (65) are parallel to each other, and the two limit plates (65) are symmetrically arranged on both sides of the threaded adjustment column (63). The two sliding plates (64) are horizontally slidably arranged on the limit plates (65). The two sliding plates (64) are movably connected to the threaded adjustment column (63) through threads. The threaded adjustment column (63) is connected to the driving shaft of the roller motor (62). The plurality of rollers (66) are evenly mounted on the bottom of the sliding plate (64).

4. A safety protection device for tunnel blasting according to claim 1, characterized in that: A buffer frame (45) is fixedly mounted on the inner side of each of the two side baffles (4); A plurality of side plate connecting columns (44) are evenly fixed on the protective side plate (41) in a rectangular shape, and the side plate connecting columns (44) pass through the side baffle plate (4) and are fixed to the buffer frame (45), and each of the side plate connecting columns (44) is slidably arranged in a hole of the side baffle plate (4), and the buffer frame (45) is a fence-like frame structure; A plurality of protective springs (43) are evenly arranged between the protective side plate (41) and the side baffle plate (4), and both ends of the protective springs (43) are locked with the side baffle plate (4) and the protective side plate (41); The side baffles (4), protective side plates (41), side plate connecting columns (44) and buffer frames (45) on both sides are of the same assembly structure; The protective side plates (41), the side baffles (4) and the buffer frame (45) are all arranged vertically and parallel to each other.

5. The safety protection device for tunnel blasting according to claim 1, characterized in that: The side baffles (4) on both sides are parallel to each other, and the two side baffles (4) are perpendicular to the explosion point guard plate (7); The protective top plate (1) is an arched protective plate, and the protective top plate (1), the side baffles (4), the protective side plates (41) and the explosion point protective plate (7) are all steel plates.

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