Foldable anchor net and supporting device

Abstract

The utility model provides a foldable anchor net and a supporting device. The foldable anchor net comprises a lap joint part and a moving part. The moving part can rotate around the lap joint part; the supporting device further comprises trays and anchor rods, the multiple sets of foldable anchor nets are arranged, fixing holes are formed in the trays, and the anchor rods can penetrate through the fixing holes to conduct stubble pressing and fixing on the moving parts of the front set and the lap joint parts of the rear set. By means of mutual matching of the foldable anchor nets, the trays and the anchor rods, the anchor net stubble pressing and lap joint procedures can be completed at a time, the previous set of anchor nets and the next set of anchor nets can be fully and fixedly lapped, back-and-forth operation is not needed, and working efficiency is effectively improved; repeated pre-tightening construction of the anchor rod is avoided, repeated supporting of the anchor rod on shallow surrounding rock is reduced, the integrity of the surrounding rock is improved, and the supporting effect of the anchor rod is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine shaft and tunnel engineering, in particular to a foldable anchor net and a supporting device. Background Art

[0002] When excavating underground rock tunnels in coal mines, it is necessary to support the surrounding rock of the tunnel. The support range of anchor nets in rock tunnels is relatively wide. In order to further improve the effect of anchor net support, mesh overlap and anchor rod pressing are often used to fix them on site to improve the support effect of anchor nets on surrounding rocks and ensure that the anchor net support forms an effective control whole, that is, the integrity of the mesh connection is improved by anchor rod pressing at weak points; because rock tunnels often use anchor spraying, and anchor spraying mostly uses steel mesh. Because metal mesh, flexible mesh, etc. are easily damaged when the mine pressure is severe, and it is easy to cause a net bag effect. The steel mesh is not easy to be damaged when the rock tunnel is under pressure, and the roof support effect is better, but the steel mesh is rigid and cannot be folded.

[0003] During the construction of rock tunnels, the row of anchor rods near the head must be constructed in advance to avoid excavation in an empty roof state. However, since the steel mesh cannot be folded, after the construction of the head anchor rod is completed, before the construction of the next anchor rod, the excavation length does not match the anchor mesh length, and the anchor mesh overlap process between the two cycles cannot be carried out. The construction of the first row of anchor rods on site mostly adopts the "1-0-1" longitudinal arrangement, that is, one anchor rod is left empty and no pre-tightening is performed. At the same time, the pre-tightening force applied to the pre-tightened anchor rod does not reach the pre-tightening value designed in the regulations. After the construction of the next anchor rod is completed, the nut of the head anchor rod of the previous cycle is removed, and the steel mesh is overlapped and pre-tightened again. This working method not only causes back and forth operations with low work efficiency, but also leads to repeated support of the shallow part of the top plate by the anchor rod, affecting the overall performance of the surrounding rock and affecting the initial support effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to fold the anchor net.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A foldable anchor net comprises an overlapping portion (11) and a movable portion (12); the movable portion (12) can rotate around the overlapping portion (11).

[0007] Beneficial effect: By rotating the moving part and the overlapping part, the moving part can be folded relative to the overlapping part.

[0008] Furthermore, the overlapping portion (11) and the movable portion (12) are both anchor nets, and the anchor nets are made of 6 mm steel bars with a spacing of 100×100 mm.

[0009] Furthermore, the overlapping portion (11) is 300 mm in length.

[0010] Furthermore, the moving part (12) is 700 mm in length.

[0011] Furthermore, it also comprises a rotating ring (13) and a rotating shaft (14); the rotating ring (13) is fixed to the front and rear ends of the overlapping portion (11) close to the moving portion (12); the rotating shaft (14) is fixed to the side of the moving portion (12) close to the overlapping portion (11); the rotating ring (13) is sleeved on the rotating shaft (14) so ​​that the moving portion (12) can rotate.

[0012] Beneficial effect: Through the cooperation between the rotating ring and the rotating shaft, the moving part can rotate relative to the overlapping part.

[0013] Furthermore, the transverse ribs at the tail of the overlapping portion (11) are lengthened and bent into a rotating ring (13), and the longitudinal ribs at the head of the moving portion (12) are the rotating shaft (14).

[0014] Furthermore, it also includes a limiting portion (15), and the limiting portion (15) is fixed at the front and rear ends of the rotating shaft (14) close to the rotating ring (13), and the limiting portion (15) can limit the longitudinal movement distance of the rotating shaft (14).

[0015] Beneficial effect: By setting the limiting part, the longitudinal movement distance of the rotating shaft can be limited.

[0016] Furthermore, the limiting portion (15) is a circular steel ring welded on the rotating shaft (14).

[0017] The utility model also discloses a supporting device comprising the foldable anchor net described in any of the above technical solutions, and also comprising a tray (2) and an anchor rod (3). The foldable anchor net is provided in multiple groups, and a fixing hole (21) is provided on the tray (2). The anchor rod (3) can pass through the fixing hole (21) to press and fix the moving part (12) of the previous group and the overlapping part (11) of the latter group.

[0018] Beneficial effects: Through the mutual cooperation of the foldable anchor net, tray and anchor rod, the anchor net overlapping process can be completed at one time, so that the previous group of anchor nets and the next group of anchor nets can be fully overlapped and fixed without the need for back and forth operations, which effectively improves work efficiency; avoids repeated pre-tightening construction of anchor rods, reduces the repeated support of anchor rods on shallow surrounding rocks, improves the integrity of surrounding rocks, and ensures the support effect of anchor rods.

[0019] Furthermore, the tray (2) is in the form of a rectangular sheet, and the middle portion of the tray (2) is in the form of a convex surface and is provided with a fixing hole (21).

[0020] The advantages of the utility model are:

[0021] The utility model enables the moving part to be folded relative to the overlapping part through the rotation arrangement of the moving part and the overlapping part.

[0022] The utility model enables the moving part to rotate relative to the overlapping part through the mutual cooperation of the rotating ring and the rotating shaft.

[0023] The utility model can limit the longitudinal movement distance of the rotating shaft by setting the limiting part.

[0024] The utility model realizes the mutual cooperation of the foldable anchor net, the tray and the anchor rod, so that the overlapping process of the anchor net can be completed at one time, so that the previous group of anchor nets and the subsequent group of anchor nets can be fully overlapped and fixed without the need for reciprocating operations, thereby effectively improving the work efficiency; avoiding repeated pre-tightening construction of the anchor rod, reducing the repeated support of the anchor rod on the shallow surrounding rock, improving the integrity of the surrounding rock, and ensuring the support effect of the anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an assembly diagram of a support device according to an embodiment of the utility model;

[0026] Figure 2 for Figure 1 A magnified view of middle;

[0027] Figure 3 A top view of a tray in a support device according to an embodiment of the utility model;

[0028] Figure 4 It is a front view of a tray in a supporting device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1

[0031] like Figure 1 As shown, this embodiment provides a supporting device, including a foldable anchor net 1, a tray 2, and an anchor rod 3.

[0032] like Figure 1 , Figure 2As shown, the foldable anchor net 1 includes an overlap portion 11, a moving portion 12, a rotating ring 13, a rotating shaft 14, and a limiting portion 15; the rotating ring 13 is fixed to the front and rear ends of the overlap portion 11 near the moving portion 12, and the rotating shaft 14 is fixed to the side of the moving portion 12 near the overlap portion 11. The rotating ring 13 is sleeved on the rotating shaft 14 so that the moving portion 12 can rotate. The limiting portion 15 is fixed to the front and rear ends of the rotating shaft 14 near the rotating ring 13, and the rotating ring 13 is limited by the limiting portion 15 to move within a certain longitudinal distance;

[0033] In the example of this embodiment, the overlap part 11 and the movable part 12 are both anchor nets, and the anchor net material is 6mm steel bars with a spacing of 100×100mm; the length of the overlap part 11 is 300mm, and the length of the movable part 12 is 700mm. The lengths of the overlap part 11 and the movable part 12 can be adjusted according to the specific design; the transverse reinforcement at the tail of the overlap part 11 is lengthened and bent into a rotating ring 13, which is connected to the longitudinal reinforcement (rotating axis 14) at the head of the movable part 12. At this time, the movable part 12 can rotate around the rotating axis 14, which is convenient for the movable part 12 to fold outward when the empty top length of the tunnel is not enough; a limiting part 15 is set at the front and rear ends of the head of the movable part 12 to limit the longitudinal displacement of the overlap part 11 around the rotating axis 14 to improve the stubble pressing effect; the limiting part 15 is a circular steel ring welded on the rotating axis 14, which is used to limit the rotating ring 13 so that no longitudinal displacement occurs between the overlap part 11 and the movable part 12.

[0034] like Figure 3 , Figure 4 As shown, the pallet 2 is arranged as a rectangular sheet, the middle part of the pallet 2 is arranged as a convex surface and is provided with a fixing hole 21, and the anchor rod 3 can pass through the fixing hole 21 to press and fix the moving part 12 of the previous group and the overlapping part 11 of the latter group; when pressing, the anchor rod 3 and the pallet 2 are used for fixing, and the moving part 12 can rotate around the overlapping part 11 after pressing.

[0035] When in use, the moving part 12 of the previous group is fixed with the overlapping part 11 of the subsequent group. After the fixing, the moving part 12 can be turned over and folded outward. When the empty top length of the tunnel is greater than or equal to the length of the moving part 12, the moving part 12 can be unfolded to carry out the next cycle of anchor net overlapping. The device enables the anchor net overlapping process to be completed at one time, so that the previous group of anchor nets and the subsequent group of anchor nets can be fully overlapped and fixed without reciprocating operations, which effectively improves the work efficiency and the support effect of the anchor rod.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable anchor net, characterized in that: It comprises an overlapping portion (11), a moving portion (12), a rotating ring (13), and a rotating shaft (14); The movable part (12) is capable of rotating around the overlapping part (11); a rotating ring (13) is fixed to the front and rear ends of the overlapping part (11) close to the movable part (12); a rotating shaft (14) is fixed to the side of the movable part (12) close to the overlapping part (11); the rotating ring (13) is sleeved on the rotating shaft (14) so ​​that the movable part (12) can rotate.

2. A foldable anchor net according to claim 1, characterized in that: The overlapping part (11) and the moving part (12) are both anchor nets, and the material of the anchor nets is 6 mm steel bars with a spacing of 100×100 mm.

3. A foldable anchor net according to claim 1, characterized in that: The overlapping portion (11) is 300 mm long.

4. A foldable anchor net according to claim 3, characterized in that: The moving part (12) is 700 mm long.

5. The foldable anchor net according to claim 1, characterized in that: The transverse ribs at the tail of the overlapping portion (11) are lengthened and bent into a rotating ring (13), and the longitudinal ribs at the head of the moving portion (12) are the rotating shaft (14).

6. A foldable anchor net according to claim 1, characterized in that: It also comprises a limiting portion (15), wherein the limiting portion (15) is fixed at the front and rear ends of the rotating shaft (14) close to the rotating ring (13), and the limiting portion (15) can limit the longitudinal movement distance of the rotating shaft (14).

7. A foldable anchor net according to claim 6, characterized in that: The limiting portion (15) is a circular steel ring welded on the rotating shaft (14).

8. A support device comprising the foldable anchor net according to any one of claims 1 to 7, characterized in that: It also comprises a tray (2) and an anchor rod (3), wherein the foldable anchor net is provided in multiple groups, the tray (2) is provided with a fixing hole (21), and the anchor rod (3) can pass through the fixing hole (21) to press and fix the moving part (12) of the previous group and the overlapping part (11) of the next group.

9. A support device according to claim 8, characterized in that: The tray (2) is in the form of a rectangular sheet, and the middle portion of the tray (2) is in the form of a convex surface and is provided with a fixing hole (21).

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