An underground cave excavation and expansion device

Abstract

An underground cave excavation and reaming device comprises a drill rod, a reaming device is installed on the drill rod, a guide sleeve is installed inside the drill rod, a rectangular cavity is inside the guide sleeve, and one end of the cavity penetrates the outer wall of the drill rod; the reaming device comprises a tool, the tool comprises an extension rod and a tool body located at one end of the extension rod, and the extension rod is inserted and installed in the cavity. The diameter of the drill rod can be adjusted by replacing the tool or adjusting the extension length of the tool, the structure is simple, the tool stability is good, and the tool is not easy to deform when in use.

Description

Technical Field

[0001] The utility model relates to the technical field of drill rods, in particular to an underground cave excavation and expansion device. Background Art

[0002] In the process of underground cavern excavation, a large amount of drilling construction work is involved. Sometimes, according to the construction requirements, the holes need to be expanded. At present, when dealing with the expansion problem, it is necessary to prepare drill rods of different diameters to perform secondary processing of the holes. In this method, it is necessary to prepare multiple drill rods of different diameters. Therefore, an underground cavern excavation expansion device with variable diameter is proposed.

[0003] After searching, Chinese patent document CN218716552U, published (announcement) date: 2023.03.24, discloses a telescopic mechanical reaming drill bit, including a drill rod, one end of the drill rod is connected to a drill bit, the outer side of the drill rod is symmetrically provided with an embedding groove consistent with the length direction of the drill rod, and a telescopic reaming tool is arranged in each embedding groove. A high-pressure pipeline is also arranged in the drill rod, and the high-pressure pipeline is connected to the embedding groove and the drill bit respectively. A spring is arranged in the high-pressure pipeline, and the spring is connected to the telescopic reaming tool. Its characteristics are: the size of the reaming pressure relief drilling hole can be adjusted; its disadvantage is that the tool chain is only connected to the drill rod at both ends, the structural stability of the tool chain is poor, and the tool chain is more likely to deform during use. Utility Model Content

[0004] The utility model aims to provide an underground cave excavation and expansion device, which can adjust the diameter of a drill rod by replacing a tool or adjusting the extension length of the tool, has a simple structure, good tool stability, and is not easily deformed when in use.

[0005] To achieve the above-mentioned purpose, the utility model provides an underground cavern excavation and reaming device, comprising a drill rod, on which at least one reaming device is installed, a guide sleeve is installed inside the drill rod, the guide sleeve has a rectangular cavity inside, and one end of the cavity passes through the outer wall of the drill rod; the reaming device comprises a tool, which comprises an extension rod and a tool body located at one end of the extension rod, and the extension rod is inserted and installed in the cavity.

[0006] A threaded hole is provided in the extending rod, and the reaming device also includes an adjusting screw, one end of which is threadedly engaged with the threaded hole, and the other end is rotationally limitedly connected to the drill rod and extends out of the drill rod for a distance, and a twisting portion is provided at one end of the extending drill rod.

[0007] A threaded hole is provided in the extending rod, and the other end of the cavity also passes through the outer wall of the drill rod, and a mounting seat is installed at the penetration point, and a connecting hole is provided in the middle of the mounting seat. The reaming device also includes an adjusting screw, one end of the adjusting screw is threadedly engaged with the threaded hole, and the other end passes through the connecting hole. A limiting nut is installed at one end of the adjusting screw located on the mounting seat, and a screwing portion is provided at the end.

[0008] The mounting seat is provided with a groove on a side away from the tool, and the limiting nut and the screwing part are located in the groove.

[0009] A blind cover is installed on the mounting seat, and the blind cover seals the groove.

[0010] The knife body is provided with knife teeth.

[0011] A gear sleeve is installed on the knife teeth.

[0012] The drill rod is provided with a tool groove at one end corresponding to the guide sleeve, the cavity runs through the tool groove, and the tool groove is used to accommodate the tool body.

[0013] Compared with the prior art, the utility model has the following technical effects:

[0014] The utility model can adjust the diameter of the drill rod hole by replacing the tool, and can also rotate the screw part to rotate the adjusting screw, and the adjusting screw cooperates with the threaded hole of the extension rod, so that the extension length of the tool can be adjusted, thereby realizing the adjustment of the diameter of the drill rod hole. The utility model has the characteristics of simple structure, good tool stability, and the tool is not easy to deform when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the AA section structure.

[0018] Figure 3 for Figure 1 Schematic diagram of the BB section structure.

[0019] Figure 4 It is a structural schematic diagram of the utility model when the cutter is extended.

[0020] Figure 5 It is a schematic diagram of the top view of the structure of the tool of the utility model.

[0021] In the figure:

[0022] Drill rod 100, tool groove 101, rib plate 102; guide sleeve 110, cavity 111;

[0023] Hole expansion device 200, cutter 210, extension rod 211, cutter body 212, threaded hole 213, cutter teeth 214, gear sleeve 215; adjustment screw 220, twisting part 221; mounting seat 230, connecting hole 231, groove 232; limiting nut 240, cover 250;

[0024] Drill bit 300. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] Embodiment 1:

[0027] See also Figure 1-5 , an underground cavern excavation and reaming device, comprising a drill rod 100, one end of which can be mounted with a drill bit 300. A reaming device 200 is mounted on the drill rod 100, the drill rod 100 is internally mounted with a guide sleeve 110, the guide sleeve 110 has a rectangular cavity 111 inside, one end of the cavity 111 penetrates the outer wall of the drill rod 100; the reaming device 200 comprises a cutter 210, the cutter 210 comprises a protruding rod 211 and a cutter body 212 at one end of the protruding rod 211, the protruding rod 211 is inserted and mounted in the cavity 111. In this embodiment, by replacing the cutter 210 with different protruding rod 211 lengths, the hole diameter of the drill rod 100 can be adjusted.

[0028] Specifically, the cavity 111 is a rectangular cavity, and the extension rod 211 cooperates with the rectangular cavity 111, so that the cutter 210 will not rotate when in use, and the structure has good stability.

[0029] Preferably, two reaming devices 200 or three reaming devices are installed on the drill rod 100 at intervals and evenly distributed in an annular pattern.

[0030] In this embodiment, the cavity 111 has a certain depth. When installing the tool 210, a bolt mounting hole can be axially set on the tool. The long screw is inserted into the bolt mounting hole on the tool 210 and then screwed into the bottom thread of the cavity 111, thereby fixing the tool 210 and the guide sleeve 110.

[0031] Embodiment 2:

[0032] See also Figure 2 , 3A threaded hole 213 is provided in the extending rod 211, and the reaming device 200 also includes an adjusting screw 220, one end of which is threadedly engaged with the threaded hole 213, and the other end is rotationally limitedly connected to the drill rod 100 and extends out of the drill rod 100 for a certain distance, and a twisting portion 221 is provided at one end of the extending drill rod 100.

[0033] In this embodiment, the adjusting screw 220 is connected to the drill rod 100 in a rotationally limited manner, that is, the adjusting screw 220 can only rotate and cannot be axially positioned. For example, a limiting ring is welded on the inner and outer walls of the drill rod 100 on the adjusting screw 220, and the adjusting screw 220 can be axially limited by the limiting ring, and the adjusting screw 220 can also rotate.

[0034] By rotating the screwing part 221, the adjusting screw 220 is rotated. Since the adjusting screw 220 cooperates with the threaded hole 213 of the extension rod 211, the extension length of the tool 210 can be adjusted, thereby adjusting the hole diameter of the drill rod 100.

[0035] Preferably, the twisting portion 221 is an outer polygonal structure or an inner polygonal structure.

[0036] Embodiment three:

[0037] See also Figure 2-4 A threaded hole 213 is provided in the extending rod 211, and the other end of the cavity 111 also passes through the outer wall of the drill rod 100, and a mounting seat 230 is installed at the penetration point, and a connecting hole 231 is provided in the middle of the mounting seat 230. The reaming device 200 also includes an adjusting screw 220, one end of the adjusting screw 220 is threadedly engaged with the threaded hole 213, and the other end passes through the connecting hole 231. A limiting nut 240 is installed at one end of the adjusting screw 220 located at the mounting seat 230, and a screwing portion 221 is provided at the end.

[0038] With the above structure, after adjusting the extension length of the cutter 210 by the screwing portion 221, the limiting nut 240 is tightened, so that the adjusting screw 220 can be fixed to prevent the adjusting screw 220 from rotating during use.

[0039] When adjusting, the blade body 212 of the blade 210 faces upward, the limiting nut 240 is loosened first, and then the screwing part 221 is rotated by a wrench, so that the extension length of the blade 210 can be adjusted by rotating the adjusting screw 220. After the adjustment is completed, the limiting nut 240 is tightened.

[0040] Furthermore, the mounting seat 230 is provided with a groove 232 on a side away from the cutter 210 , and the limiting nut 240 and the screwing portion 221 are located in the groove 232 , so that the screwing portion 221 will not collide with the inner wall of the hole.

[0041] Furthermore, a cover 250 is installed on the mounting seat 230 , and the cover 250 seals the groove 232 to prevent the groove 232 from being filled with soil.

[0042] Based on the first, second and third embodiments, see Figure 5 The cutter 210 is T-shaped, and the cutter body 212 is provided with cutter teeth 214 to facilitate hole expansion.

[0043] Furthermore, a tooth sleeve 215 is installed on the blade teeth 214 to prevent the blade teeth 214 from being worn.

[0044] Specifically, the structures of the blade teeth 214 and the tooth sleeves 215 are similar to the structures of the blade teeth on the shovel of an excavator.

[0045] Embodiment 4:

[0046] On the basis of the first, second and third embodiments, the drill rod 100 is provided with a tool groove 101 at one end corresponding to the guide sleeve 110, the cavity 111 passes through the tool groove 101, and the tool groove 101 is used to accommodate the cutter body 212. In this way, the drill rod 100 can also be used as an ordinary drill rod.

[0047] In order to ensure the stability of the installation of the guide sleeve 110, see Figure 4 A plurality of ribs 102 are welded between the inner wall of the drill rod 100 and the outer wall of the guide sleeve 110 .

[0048] The working principle or action process of the utility model is as follows:

[0049] See also Figure 3 , 4 When the hole needs to be expanded, the cover 250 is removed, and then one end of the cutter body 212 of the cutter 210 is facing upward, the limit nut 240 is loosened first, and then the twisting part 221 is turned by a wrench, so that the extension length of the cutter 210 can be adjusted by turning the adjusting screw 220. After the adjustment is completed, the limit nut 240 is tightened, and then the cover 250 is reinstalled. In this way, the extension length of the cutter 210 can be adjusted by turning the adjusting screw 220.

Claims

1. An underground cavern excavation and reaming device, comprising a drill rod (100), wherein at least one reaming device (200) is mounted on the drill rod (100), characterized in that: A guide sleeve (110) is installed inside the drill rod (100), and a rectangular cavity (111) is provided inside the guide sleeve (110), and one end of the cavity (111) penetrates the outer wall of the drill rod (100); the reaming device (200) comprises a cutter (210), and the cutter (210) comprises a protruding rod (211) and a cutter body (212) located at one end of the protruding rod (211), and the protruding rod (211) is inserted and installed in the cavity (111).

2. The underground cave excavation and expansion device according to claim 1, characterized in that: A threaded hole (213) is provided in the extension rod (211). The reaming device (200) further comprises an adjusting screw (220). One end of the adjusting screw (220) is threadedly engaged with the threaded hole (213), and the other end is rotationally limitedly connected to the drill rod (100) and extends out of the drill rod (100) for a certain distance. A screwing portion (221) is provided at one end extending out of the drill rod (100).

3. The underground cave excavation and expansion device according to claim 1, characterized in that: A threaded hole (213) is provided in the extension rod (211), the other end of the cavity (111) also penetrates the outer wall of the drill rod (100), and a mounting seat (230) is installed at the penetration point, and a connecting hole (231) is provided in the middle of the mounting seat (230). The reaming device (200) further comprises an adjusting screw (220), one end of the adjusting screw (220) is threadedly engaged with the threaded hole (213), and the other end passes through the connecting hole (231). A limiting nut (240) is installed at one end of the adjusting screw (220) located on the mounting seat (230), and a screwing portion (221) is provided at the end.

4. The underground cavern excavation and expansion device according to claim 3, characterized in that: The mounting seat (230) is provided with a groove (232) on a side away from the cutter (210), and the limiting nut (240) and the screwing portion (221) are located in the groove (232).

5. The underground cave excavation and expansion device according to claim 4, characterized in that: A sealing cover (250) is installed on the mounting seat (230), and the sealing cover (250) seals the groove (232).

6. The underground cavern excavation and expansion device according to claim 1, characterized in that: The knife body (212) is provided with knife teeth (214).

7. The underground cave excavation and expansion device according to claim 6, characterized in that: A tooth sleeve (215) is mounted on the blade teeth (214).

8. An underground cavern excavation and expansion device according to any one of claims 1 to 3, characterized in that: The drill rod (100) is provided with a tool groove (101) at one end corresponding to the guide sleeve (110); the cavity (111) passes through the tool groove (101); and the tool groove (101) is used to accommodate a tool body (212).

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