Foundation pit stone cubic meter blasting protection device

Abstract

The utility model discloses a foundation pit stone cubic blasting protection device, including top frame and the fixed beam of many of fixed in top frame bottom, each fixed beam is arranged in parallel along the length direction of top frame and extends along the width direction of top frame, and the adjacent fixed beam between all movably inserts the protection board that can float up and down, top frame is equipped with a plurality of elastic abutting mechanisms above each protection board, and the elastic abutting mechanism is abutting on the top surface of protection board.

Description

Technical Field

[0001] This utility model relates to the field of blasting construction technology, specifically to a protective device for rock blasting in foundation pits. Background Technology

[0002] In station foundation pits located near urban roads and buildings, rock blasting generates a large amount of flying rocks. To ensure the safety of surrounding vehicles, pedestrians, project personnel, and buildings, it is necessary to increase the requirements for foundation pit blasting protection. Traditional mobile protective sheds typically have long construction periods, high material and cost inputs, and affect the construction progress.

[0003] A Chinese patent document with application number 202022395704.7 discloses a movable protective cover for blasting deep foundation pits in subway stations in densely built-up areas. The protective cover covers the opening at the top of the foundation pit and is bolted to a supporting beam at the top of the pit. The protective cover includes a thick steel plate, I-beams, and reinforcing ribs. Multiple parallel I-beams are fixed to both sides and the middle of the top surface of the thick steel plate, and multiple reinforcing ribs are symmetrically fixed to the top surface of the thick steel plate. Multiple lifting rings are symmetrically fixed to the I-beams on both sides of the top surface of the thick steel plate. This movable protective cover has the following shortcomings:

[0004] 1) The thick steel plate is a single piece covering the foundation pit, which is heavy and inconvenient to move, install and replace;

[0005] 2) Thick steel plates need to be made very thick to withstand the rigid impact during blasting, which increases the cost. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a foundation pit rock blasting protection device that is easy to move, install and replace and can reduce manufacturing costs.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A protective device for rock blasting in a foundation pit includes a top frame and multiple fixed beams fixed to the bottom of the top frame. Each of the fixed beams is arranged parallel to each other along the length of the top frame and extends along the width of the top frame. A protective plate that can float up and down is movably inserted between adjacent fixed beams. The top frame is provided with multiple elastic clamping mechanisms above each protective plate, and the elastic clamping mechanisms clamp against the top surface of the protective plate.

[0009] As a further improvement to the above technical solution:

[0010] The elastic clamping mechanism includes a guide cylinder, a clamping rod, an elastic element, and an adjusting screw. The guide cylinder is located on the top frame. The clamping rod is movably sleeved with the guide cylinder. The adjusting screw is threadedly connected to the guide cylinder and can extend above the guide cylinder. The elastic element is located inside the guide cylinder and abuts against the adjusting screw and the clamping rod. The bottom end of the clamping rod abuts against the top surface of the protective plate.

[0011] The top end of the clamping rod is provided with an outer convex ring, and the bottom end of the guide cylinder is provided with an inner convex ring. The outer convex ring is slidably engaged with the inner wall of the guide cylinder, and the clamping rod is slidably engaged with the inner wall of the inner convex ring.

[0012] The top of the adjusting screw is provided with a screwing part.

[0013] The screwing part is smaller than the adjusting screw.

[0014] The guide cylinder is fixedly connected to the top frame or threadedly connected.

[0015] The elastic element is a spring.

[0016] A flexible pad is provided between the top frame and the protective plate.

[0017] Each of the fixed beams has a slot on its sidewall facing the protective plate, and the two sides of the protective plate are respectively inserted into the corresponding slots. Reinforcing ribs connect the bottoms of adjacent fixed beams.

[0018] The top frame is provided with lifting lugs, and among the multiple fixed beams, the outer sides of the fixed beams on both sides are respectively provided with fixed plates, and the fixed plates are provided with bolt holes.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] This utility model discloses a protective device for rock blasting in foundation pits. In use, the protective panels can be disassembled and moved to the foundation pit. First, the main body, consisting of the top frame and fixing beams, is placed over the pit. Then, each protective panel is inserted between the fixing beams, and adjustable elastic clamping mechanisms secure it to the top surface of the protective panel, positioning it at the pit. When rock blasting occurs, flying rocks impact the protective panels. Due to the elastic contraction of the clamping mechanisms, the protective panels float upwards, reducing the impact force. Firstly, each protective panel is a separate structure; compared to a monolithic structure, each panel is lighter and easier to install. The panels are also installed in an insert-type drawer, allowing for separate movement, on-site assembly, and convenient handling and replacement. Secondly, the flexible clamping action of the elastic clamping mechanisms buffers the impact of flying rocks, reducing the thickness of the protective panels and thus lowering manufacturing costs. Attached Figure Description

[0021] Figure 1This is a top view schematic diagram of the protective device for rock blasting in foundation pits according to this utility model.

[0022] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of AA.

[0023] Figure 3 yes Figure 2 An enlarged structural diagram at point B.

[0024] Figure 4 yes Figure 2 A magnified structural diagram at point C.

[0025] The labels in the diagram represent:

[0026] 1. Top frame; 2. Fixed beam; 21. Reinforcing rib; 3. Protective plate; 4. Elastic clamping mechanism; 41. Guide cylinder; 411. Inner convex ring; 42. Clamping rod; 421. Outer convex ring; 43. Elastic element; 44. Adjusting screw; 441. Tightening part; 5. Slot; 6. Flexible pad; 7. Lifting lug; 8. Fixed plate; 81. Bolt hole; 9. Support beam. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Figures 1 to 4 This invention illustrates one embodiment of the foundation pit rock blasting protection device. The foundation pit rock blasting protection device of this embodiment includes a top frame 1 and multiple fixed beams 2 fixed to the bottom of the top frame 1. Each fixed beam 2 is arranged parallel to each other along the length direction of the top frame 1 and extends along the width direction of the top frame 1. A protective plate 3 that can float up and down is movably inserted between adjacent fixed beams 2. Multiple elastic abutting mechanisms 4 are provided above each protective plate 3 on the top frame 1. The elastic abutting mechanisms 4 abut against the top surface of the protective plate 3.

[0032] In use, each protective plate 3 can be disassembled and moved to the foundation pit. First, the main body, consisting of the top frame 1 and the fixing beams 2, is placed over the foundation pit. Then, each protective plate 3 is inserted between the fixing beams 2, and then secured to the top surface of the protective plate 3 by the adjustable elastic clamping mechanisms 4, thus positioning the protective plate 3 at the foundation pit. When the foundation pit is blasted, the flying rocks impact the protective plates 3. Due to the elastic contraction of the elastic clamping mechanisms 4, the protective plates 3 float upwards, reducing the impact force. First, each protective plate 3 is a separate structure. Compared to the integral structure, each protective plate 3 is lighter and easier to install. Furthermore, the protective plates 3 are installed in an insert-type drawer, allowing for separate movement, on-site assembly, and convenient handling and replacement. Second, the flexible clamping action of the elastic clamping mechanisms 4 buffers the impact force of flying rocks, thus reducing the thickness of the protective plates 3 and lowering manufacturing costs.

[0033] Furthermore, in this embodiment, as Figure 3 As shown, the elastic clamping mechanism 4 includes a guide cylinder 41, a clamping rod 42, an elastic element 43, and an adjusting screw 44. The guide cylinder 41 is mounted on the top frame 1. The clamping rod 42 is movably sleeved with the guide cylinder 41. The adjusting screw 44 is threadedly connected to the guide cylinder 41 and can extend above the guide cylinder 41. The elastic element 43 is located inside the guide cylinder 41 and abuts against the adjusting screw 44 and the clamping rod 42. The bottom end of the clamping rod 42 abuts against the top surface of the protective plate 3. By rotating the adjusting screw 44, the amount of contraction of the elastic element 43 can be adjusted, thereby adjusting the clamping force of the clamping rod 42 on the protective plate 3.

[0034] Furthermore, in this embodiment, the top end of the clamping rod 42 is provided with an outer protruding ring 421, and the bottom end of the guide cylinder 41 is provided with an inner protruding ring 411. The outer protruding ring 421 is slidably engaged with the inner wall of the guide cylinder 41, and the clamping rod 42 is slidably engaged with the inner wall of the inner protruding ring 411. Under the limiting action of the outer protruding ring 421 and the inner protruding ring 411, the clamping rod 42 can be prevented from dislodging from the guide cylinder 41.

[0035] Furthermore, in this embodiment, the top end of the adjusting screw 44 is provided with a screwing part 441. An external screwing component can be used in conjunction with the screwing part 441 to rotate the adjusting screw 44.

[0036] Furthermore, in this embodiment, the screwing part 441 is smaller than the adjusting screw 44. Additionally, the screwing part 441 can extend into the guide cylinder 41, increasing the pressing depth of the adjusting screw 44. Of course, in other embodiments, the screwing part 441 may be larger than the adjusting screw 44.

[0037] Furthermore, in this embodiment, the guide cylinder 41 is threadedly connected to the top frame 1, thus allowing the guide cylinder 41 to be rotated to adjust the overall lifting and lowering of the elastic clamping mechanism 4. Of course, in other embodiments, the guide cylinder 41 and the top frame 1 can also be fixedly connected. Preferably, the guide cylinder 41 is perpendicular to the top frame 1.

[0038] Furthermore, in this embodiment, the elastic element 43 is a spring.

[0039] Furthermore, in this embodiment, a flexible pad 6, such as a rubber pad, foam pad, or air cushion, is provided between the top frame 1 and the protective plate 3. Specifically, the flexible pad 6 is inserted between the top frame 1 and the protective plate 3 after the elastic clamping mechanism 4 clamps the protective plate 3, thereby improving the overall impact resistance.

[0040] Furthermore, in this embodiment, slots 5 are provided on the side walls of the fixed beams 2 facing the protective plate 3, and the two sides of the protective plate 3 are respectively inserted into the corresponding slots 5. Reinforcing ribs 21 are connected between the bottoms of adjacent fixed beams 2. Specifically, the height of the slots 5 is greater than the thickness of the protective plate 3. The reinforcing ribs 21 connected between the bottoms of adjacent fixed beams 2 improve the overall strength.

[0041] Furthermore, in this embodiment, the top frame 1 is provided with lifting lugs 7 for easy hoisting. Among the multiple fixed beams 2, the outer sides of the fixed beams 2 on both sides are respectively provided with fixed plates 8, and the fixed plates 8 are provided with bolt holes 81. The fixed plates 8 are fixed to the support beams 9 on the side wall of the foundation pit by bolts passing through the bolt holes 81.

[0042] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A protective device for rock blasting in a foundation pit, characterized in that: Includes a top frame (1) and multiple fixed beams (2) fixed at the bottom of the top frame (1). Each fixed beam (2) is arranged parallel to each other along the length direction of the top frame (1) and extends along the width direction of the top frame (1). A protective plate (3) that can float up and down is movably inserted between adjacent fixed beams (2). The top frame (1) is provided with multiple elastic abutting mechanisms (4) above each protective plate (3). The elastic abutting mechanism (4) abuts against the top surface of the protective plate (3).

2. The foundation pit rock blasting protection device according to claim 1, characterized in that: The elastic clamping mechanism (4) includes a guide cylinder (41), a clamping rod (42), an elastic element (43), and an adjusting screw (44). The guide cylinder (41) is located on the top frame (1). The clamping rod (42) is movably sleeved with the guide cylinder (41). The adjusting screw (44) is threadedly connected to the guide cylinder (41) and can extend above the guide cylinder (41). The elastic element (43) is located inside the guide cylinder (41) and abuts against the adjusting screw (44) and the clamping rod (42). The bottom end of the clamping rod (42) abuts against the top surface of the protective plate (3).

3. The foundation pit rock blasting protection device according to claim 2, characterized in that: The top end of the clamping rod (42) is provided with an outer protruding ring (421), and the bottom end of the guide cylinder (41) is provided with an inner protruding ring (411). The outer protruding ring (421) is slidably engaged with the inner wall of the guide cylinder (41), and the clamping rod (42) is slidably engaged with the inner wall of the inner protruding ring (411).

4. The foundation pit rock blasting protection device according to claim 2, characterized in that: The top end of the adjusting screw (44) is provided with a screwing part (441).

5. The foundation pit rock blasting protection device according to claim 4, characterized in that: The screwing part (441) is smaller than the adjusting screw (44).

6. The foundation pit rock blasting protection device according to claim 2, characterized in that: The guide cylinder (41) is fixedly connected to the top frame (1) or threadedly connected.

7. The foundation pit rock blasting protection device according to claim 2, characterized in that: The elastic element (43) is a spring.

8. The foundation pit rock blasting protection device according to any one of claims 1 to 7, characterized in that: A flexible pad (6) is provided between the top frame (1) and the protective plate (3).

9. The foundation pit rock blasting protection device according to any one of claims 1 to 7, characterized in that: The fixed beam (2) has slots (5) on the side wall facing the protective plate (3). The two sides of the protective plate (3) are respectively inserted into the corresponding slots (5). The bottom of the adjacent fixed beams (2) are connected by reinforcing ribs (21).

10. The foundation pit rock blasting protection device according to any one of claims 1 to 7, characterized in that: The top frame (1) is provided with a lifting lug (7), and among the multiple fixed beams (2), the outer sides of the fixed beams (2) on both sides are provided with a fixing plate (8), and the fixing plate (8) is provided with a bolt hole (81).

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