Portable dismountable telescopic roof support device with arched tunnel

Abstract

This utility model relates to an arched tunnel advance support for a conveniently disassembled and retractable roof protection device, comprising a telescopic front beam roof protection device, a top beam roof protection device, and a tunnel advance support body. The telescopic front beam roof protection device includes a left front beam roof protection device, a left front telescopic beam roof protection device, a right front beam roof protection device, and a right front telescopic beam roof protection device. The base plates of the left and right front beam roof protection devices are fixedly connected to the top plate of the front beam by bolts. The left and right front telescopic beam roof protection devices are fixed to the telescopic beam of the front beam telescopic beam of the tunnel advance support body by U-shaped pins. The left and right front telescopic beam roof protection devices extend and retract synchronously with the extension and retraction of the front beam telescopic beam. This utility model has a reasonable design, ingenious structure, is easy to operate, provides high support strength, greatly improves work efficiency, effectively ensures the safety of transshipment equipment and pedestrian passages, and has a good market prospect and development space.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support auxiliary equipment technology, and in particular to an arched tunnel advance support for a conveniently disassembled and retractable roof protection device. Background Technology

[0002] In the process of safe coal mine production, underground mining is the most important method, requiring the excavation of numerous roadways. Roadway support is crucial for maintaining roadway access and the stability of the surrounding rock, and is of great significance to mine construction and production. The basic purpose of roadway support is to buffer and reduce the movement of the surrounding rock, preventing excessive reduction in the roadway cross-section, and preventing the collapse of loosened and damaged surrounding rock.

[0003] Currently, advanced support supports are used as support equipment to support the roof of roadways. In traditional longwall mining faces, the advanced support for both roadways uses single hydraulic props in conjunction with metal articulated roof beams. The support parameters are determined based on the roadway cross-section and roof pressure to ensure the safety of the two exits. However, under high mine pressure, this type of support has drawbacks such as low support strength, slow support speed, high labor intensity, high cost, high consumption, and poor safety.

[0004] The development and use of pre-supports for roadways have compensated for the shortcomings of traditional pre-support systems, addressed the impact of traditional support methods on safe production, and achieved the goal of high coal production and efficiency. Pre-supports are being used more and more frequently. However, the top beams of traditional pre-supports are horizontal, and some coal mines require pre-supports for arched roadways. Therefore, pre-supports for arched roadways have emerged. When supporting an arched roadway roof, the top beams of commonly used pre-supports do not provide sufficient stability for the arched roadway roof. The top beams and top plates of the pre-supports cannot fully fit into the roadway, resulting in the roof not being able to evenly bear the weight of the roadway top. This uneven stress on the roof top can lead to damage in areas with heavier stress, or even damage to the pre-supports themselves, potentially causing significant safety hazards.

[0005] Designing a convenient, retractable, and easily disassembled arched tunnel support system that is rationally designed, ingeniously structured, easy to operate, provides high support strength, greatly improves work efficiency, and effectively ensures the safety of transshipment and transportation equipment and pedestrian passages is a problem that needs to be solved. Utility Model Content

[0006] To address the technical problems of poor stability of existing pre-support beams in supporting the roof of arched roadways, the inability of the pre-support beams and roofs to fully conform to the roadway, resulting in uneven load distribution on the roof and increased risk of damage to heavily stressed areas or even the pre-support itself, thus posing significant safety hazards, this invention provides a conveniently disassembled and retractable pre-support device for arched roadways. This design achieves a rational and ingenious structure, ease of operation, high support strength, and significantly improved work efficiency, effectively ensuring the safety of transshipment equipment and pedestrian passages.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an arched roadway advance support for a conveniently disassembled and retractable roof protection device, comprising a telescopic front beam roof protection device, a top beam roof protection device, and a roadway advance support body. The telescopic front beam roof protection device includes a left front beam roof protection device, a left front telescopic beam roof protection device, a right front beam roof protection device, and a right front telescopic beam roof protection device. The main body of the left front telescopic beam roof protection device is located inside the left front beam roof protection device, and the main body of the right front telescopic beam roof protection device is located inside the right front beam roof protection device. The edges of the left front beam roof protection device and the right front beam roof protection device... The edge bends downward to form a wing plate. The inner side of the wing plate is provided with a protruding limiting strip that matches the top plate of the front beam of the main body of the roadway advance support. The two limiting strips on the left and right sides together form a slot for engaging the top plate of the front beam. The bottom plates of the left and right front beam protection devices are fixedly connected to the top plate of the front beam by bolts. The left and right front telescopic beam protection devices are fixed to the telescopic beam of the front beam of the main body of the roadway advance support by U-shaped pins. The left and right front telescopic beam protection devices extend and retract synchronously with the extension and retraction of the front beam telescopic beam.

[0008] As a further optimization of the aforementioned convenient disassembly and retractable roof support device, the main body of the roadway advance support includes two support units stacked symmetrically on the left and right. Each support unit also includes a base body, a front connecting rod, a rear connecting rod, an inclined beam, a top beam, a front beam, and two columns. The upper and lower ends of the two columns are fixed to the top beam and the base body, respectively, to support and fix the top beam. The front connecting rod, the rear connecting rod, and the inclined beam form a crank-connecting rod mechanism to support and fix the top beam after the positions of the two columns are fixed. The front beam is located at the front end of the top beam, and the front beam top plate is located at the top of the front beam.

[0009] As a further optimization of the aforementioned convenient disassembly and retractable roof support device for arched roadways, the roof support device includes a left front roof support device and a right front roof support device. The left and right front roof support devices are bent downwards on both sides to form wing plates. The wing plates are provided with connection holes and U-shaped brackets for fixing tie rod assemblies. The upper part and side of the roof beam are provided with reserved holes with internal threads corresponding to the positions of the connection holes. The left and right front roof support devices are fixed to the roof beam body by the tie rod assembly.

[0010] As a further optimization of the aforementioned convenient disassembly and retractable roof support device for arched roadway advance support, the tie rod assembly includes a short tie rod and a long tie rod. The bottom of the short tie rod and the long tie rod are provided with external threads. The short tie rod and the long tie rod are respectively fixed to the roof support device and the roof body through threaded connection.

[0011] Compared with the prior art, the beneficial effects of this utility model are: I. This utility model includes a telescopic front beam roof protection device, a top beam roof protection device, and a main body of the tunnel advance support. This utility model has an ingenious structure and a high degree of conformity with the roof. The arc-shaped roof protection device can better adapt to the cross-sectional shape of the arched tunnel, and can extend and retract simultaneously with the telescopic beam to increase support for the roof, thus increasing the support strength of the support structure. The arc-shaped roof protection device also has excellent structural strength, facilitating the optimized design of the beam structure and improving material utilization.

[0012] Second, this utility model has strong applicability. In rectangular roadways, the roof protection device can be removed to ensure the normal use of the roadway ahead of schedule. It can be perfectly used in both arched and rectangular roadway environments, making it highly applicable and ensuring efficient and safe production at the working face. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main three-dimensional structure of the tunnel's advanced support system; Figure 3 This is a three-dimensional structural diagram of the telescopic front beam roof protection device viewed from below; Figure 4 This is a schematic diagram showing the connection between the telescopic front beam top protection device and the front beam body; Figure 5 This is a three-dimensional structural diagram of the top beam roof protection device viewed from below; Figure 6 This is a schematic diagram showing the connection between the roof support device and the roof beam body; Figure 7 These are schematic diagrams of the short tie rod and the long tie rod. Figure 8 This is a schematic diagram of the working state of this utility model; Figure 9 This is a schematic diagram of the main structure of this utility model; The markings in the diagram are as follows: 1. Telescopic front beam roof protection device; 101. Left front beam roof protection device; 102. Left front telescopic beam roof protection device; 103. Right front beam roof protection device; 104. Right front telescopic beam roof protection device; 105. Limiting clip; 2. Top beam roof protection device; 201. Left front top beam roof protection device; 202. Right front top beam roof protection device; 203. Connecting hole; 3. Main body of the tunnel advance support; 301. Base body; 302. Front connecting rod; 303. Rear connecting rod; 304. Inclined beam body; 305. Top beam body; 306. Front beam body; 307. Column; 308. Front beam top plate; 309. Front beam telescopic beam; 4. Short tie rod; 5. Long tie rod; 6. Adjustment jack. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] like Figure 1 , 3 As shown in Figure 4, the conveniently disassembled and retractable roof support device for arched roadways includes a telescopic front beam roof support device 1, a top beam roof support device 2, and a roadway advance support body 3. The telescopic front beam roof support device 1 includes a left front beam roof support device 101, a left front telescopic beam roof support device 102, a right front beam roof support device 103, and a right front telescopic beam roof support device 104. The main body of the left front telescopic beam roof support device 102 is located inside the left front beam roof support device 101, and the main body of the right front telescopic beam roof support device 104 is located inside the right front beam roof support device 103. The edges of the left front beam roof support device 101 and the right front beam roof support device 103 are bent downward to form wing plates. The side is provided with a protruding limiting strip 105 that matches the front beam top plate 308 of the roadway advance support body 3. The two limiting strips 105 on the left and right together form a slot for engaging the front beam top plate 308. The base plates of the left front beam top protection device 101 and the right front beam top protection device 103 are fixedly connected to the front beam top plate 308 by bolts. The left front telescopic beam top protection device 102 and the right front telescopic beam top protection device 104 are fixed to the telescopic beam of the front beam telescopic beam 309 of the roadway advance support body 3 by U-shaped locking pins. The left front telescopic beam top protection device 102 and the right front telescopic beam top protection device 104 extend and retract synchronously with the extension and retraction of the front beam telescopic beam 309.

[0016] like Figure 2As shown, the main body 3 of the tunnel advance support includes two support units stacked symmetrically on the left and right. Each support unit also includes a base body 301, a front connecting rod 302, a rear connecting rod 303, an inclined beam body 304, a top beam body 305, a front beam body 306, and two columns 307. The upper and lower ends of the two columns 307 are fixed to the top beam body 305 and the base body 301 respectively to support and fix the top beam body 305. The front connecting rod 302, the rear connecting rod 303, and the inclined beam body 304 form a crank-connecting rod mechanism to support and fix the top beam body 305 after the positions of the two columns 307 are fixed. The front beam body 306 is located at the front end of the top beam body 305, and the front beam top plate 308 is located on the top of the front beam body 306.

[0017] like Figure 5 , 6 As shown, the top beam protection device 2 includes a left front top beam protection device 201 and a right front top beam protection device 202. The left front top beam protection device 201 and the right front top beam protection device 202 are bent downwards on both sides to form wing plates. The wing plates are provided with connection holes 203 and U-shaped brackets for fixing the tie rod assembly. The upper part and the side of the top beam body 305 are provided with reserved holes with internal threads corresponding to the positions of the connection holes. The left front top beam protection device 201 and the right front top beam protection device 202 are fixed on the top beam body 305 by the tie rod assembly.

[0018] like Figure 6 , 7 As shown, the tie rod assembly includes a short tie rod 4 and a long tie rod 5. The bottom of the short tie rod 4 and the long tie rod 5 are provided with external threads. The short tie rod 4 and the long tie rod 5 are fixed to the top beam protection device 2 and the top beam body 305 respectively by threaded connection.

[0019] The installation process of this utility model is as follows: As shown in the figure, the telescopic front beam top protection device 1 mainly consists of a left front beam top protection device 101, a left front telescopic beam top protection device 102, a right front beam top protection device 103, and a right front telescopic beam top protection device 104. The main body of the left front telescopic beam top protection device 102 is inside the left front beam top protection device 101, and the main body of the right front telescopic beam top protection device 104 is inside the right front telescopic beam top protection device 103. The edges of the left front beam top protection device 101 and the right front beam top protection device 103 are bent downward to form wing plates. The inner side of the wing plates is provided with a protruding front beam top plate 30 that is connected to the main body 3 of the tunnel advance support. The 8 matching limit strips 105, the left and right limit strips 105 together form a slot for engaging the front beam top plate 308; the base plates of the left front beam top protection device 101 and the right front beam top protection device 103 are fixedly connected to the front beam top plate 308 by bolts; the left front telescopic beam top protection device 102 and the right front telescopic beam top protection device 104 are fixed to the telescopic beam of the front beam telescopic beam 309 of the roadway advance support body 3 by U-shaped pins, and the left front telescopic beam top protection device 102 and the right front telescopic beam top protection device 104 extend and retract synchronously with the extension and retraction of the front beam telescopic beam 309.

[0020] In practical applications, such as Figure 8 , 9 As shown, when the upper and lower roadways of the fully mechanized mining face are arched interfaces, this utility model makes complete contact with the roof of the arched roadway, forming a complete arc-shaped support surface, ensuring the safety of the transfer and transportation equipment and pedestrian passage below. When the advance support is lowered and moved, in order to prevent the eccentric overturning of the arc-shaped roof beam, the left and right supports are connected by adjusting jacks and connectors. The adjusting jacks play a role in stabilizing the structure.

[0021] This utility model features a reasonable design, ingenious structure, ease of operation, high support strength, and significantly improved work efficiency. It effectively ensures the safety of transshipment and transportation equipment and pedestrian passages. It solves the technical problems of existing advanced support brackets, such as poor stability of the top beam supporting the arched roadway roof, inability of the top beam and roof of the advanced support bracket to fully fit the roadway, resulting in the roof not being able to evenly bear the weight of the roadway top. Uneven stress on the roof top can lead to damage in areas with heavier stress or damage to the advanced support bracket of the roadway, which can easily cause significant safety hazards. It has a promising market prospect and development space.

[0022] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the concept of the present invention.

Claims

1. An arched tunnel advance support for a conveniently disassembled and retractable roof protection device, characterized in that: The system includes a telescopic front beam roof protection device (1), a top beam roof protection device (2), and a roadway advance support body (3). The telescopic front beam roof protection device (1) includes a left front beam roof protection device (101), a left front telescopic beam roof protection device (102), a right front beam roof protection device (103), and a right front telescopic beam roof protection device (104). The main body of the left front telescopic beam roof protection device (102) is located inside the left front beam roof protection device (101), and the main body of the right front telescopic beam roof protection device (104) is located inside the right front beam roof protection device (103). The edges of the left front beam roof protection device (101) and the right front beam roof protection device (103) are bent downward to form wing plates. The inner side of the wing plates is provided with protruding parts that interact with the main body of the roadway advance support. The limiting strip (105) used to match the front beam top plate (308) of the body (3) forms a slot for locking the front beam top plate (308) together with the left and right limiting strips (105); the bottom plates of the left front beam top protection device (101) and the right front beam top protection device (103) are fixedly connected to the front beam top plate (308) by bolts; the left front telescopic beam top protection device (102) and the right front telescopic beam top protection device (104) are fixed to the telescopic beam of the front beam telescopic beam (309) of the roadway advance support body (3) by U-shaped pin shafts, and the left front telescopic beam top protection device (102) and the right front telescopic beam top protection device (104) extend and retract synchronously with the extension and retraction of the front beam telescopic beam (309).

2. The arched tunnel advance support for the convenient disassembly and retractable roof protection device as described in claim 1, characterized in that: The main body (3) of the tunnel advance support includes two support units stacked symmetrically on the left and right. Each support unit also includes a base body (301), a front connecting rod (302), a rear connecting rod (303), an inclined beam body (304), a top beam body (305), a front beam body (306), and two columns (307). The upper and lower ends of the two columns (307) are fixed on the top beam body (305) and the base body (301) respectively to support and fix the top beam body (305). The front connecting rod (302), the rear connecting rod (303), and the inclined beam body (304) form a crank-connecting rod mechanism to support and fix the top beam body (305) after the positions of the two columns (307) are fixed. The front beam body (306) is set at the front end of the top beam body (305), and the front beam top plate (308) is set at the top of the front beam body (306).

3. The arched tunnel advance support for the convenient disassembly and retractable roof protection device as described in claim 2, characterized in that: The top beam protection device (2) includes a left front top beam protection device (201) and a right front top beam protection device (202). The left front top beam protection device (201) and the right front top beam protection device (202) are bent downward on both sides to form wing plates. The wing plates are provided with connection holes (203) and U-shaped brackets for fixing the tie rod assembly. The top beam body (305) is provided with reserved holes with internal threads corresponding to the position of the connection holes (203). The left front top beam protection device (201) and the right front top beam protection device (202) are fixed on the top beam body (305) by the tie rod assembly.

4. The conveniently disassembled and retractable roof support device for arched tunnels as described in claim 3, characterized in that: The tie rod assembly includes a short tie rod (4) and a long tie rod (5). The bottom of the short tie rod (4) and the long tie rod (5) are provided with external threads. The short tie rod (4) and the long tie rod (5) are fixed to the top beam protection device (2) and the top beam body (305) respectively by threaded connection.

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