A self-draining multi-functional drill box and anchor drilling rig

Abstract

This invention discloses a self-draining multifunctional drill box and anchor drilling rig in the field of drill boxes, including a drill box body and a front housing connected to each other; a rotating shaft is provided inside the drill box body and the front housing; an oil cavity is formed between the drill box body and the rotating shaft; one end of the oil cavity is sealed by an oil seal; a water supply cavity, a water discharge cavity, and at least two sets of water seal assemblies are provided between the front housing and the rotating shaft; at least one set of water seal assemblies is provided between the water supply cavity and the water discharge cavity; a first water discharge hole and a second water discharge hole are provided on the front housing; the first water discharge hole and the second water discharge hole are connected to the water discharge cavity; the water inlet, the water supply cavity, and the water outlet are connected in sequence through a water passage; a connecting sleeve is connected to the front housing; the water outlet is connected to the connecting sleeve; this invention allows the drill box to drain water self-draining after the water seal fails, making maintenance and repair convenient, easy to detect and replace, and protecting the system oil cavity from contamination.

Description

Technical Field

[0001] This invention belongs to the field of drilling box technology, specifically relating to a self-draining multi-functional drilling box and an anchor drilling machine. Background Technology

[0002] Currently, domestic coal mine anchoring construction equipment is gradually shifting from dedicated anchor bolt and cable drilling rigs to integrated equipment such as integrated tunneling and anchoring machines. The requirements for anchor bolt drilling rigs in coal mining equipment are becoming increasingly stringent. In most mine construction projects, anchor bolt drilling depths often need to reach over 4 meters, while anchor cable drilling depths need to reach over 10 meters. Therefore, during drilling operations, the drilling rig must use a hollow drill rod to circulate water to the drill bit tip for cooling and slag removal. Thus, the reliability of the drilling rig's water system directly affects the anchoring construction effect.

[0003] However, the applicant's research revealed the following problems during the current drilling rig's drilling box construction process:

[0004] 1. The water supply to the drilling rig is introduced from the side of the drill housing, enters the spindle through the lubrication oil chamber of the drill housing, and then flows into the front end of the drilling rig through the water inlet in the spindle, and finally into the drill rod. In this structure, the water supply is arranged in the oil chamber and the water inlet is pressurized. If the seal is damaged, pressurized water will enter the oil chamber and the drilling rig will not be able to work normally. In severe cases, there is a risk that pressurized water will enter the drilling rig motor and contaminate the main hydraulic system.

[0005] 2. The water supply to the drilling rig is introduced from the side of the drill housing. If the drilling rig seal is damaged, the lubricating grease in the drill housing's oil chamber must be removed, and the rotating shaft bearing must be disassembled before replacement. The drill housing disassembly and assembly process is difficult and complex, assembly accuracy and effectiveness cannot be guaranteed, and maintainability is poor.

[0006] 3. The water supply to the drilling rig is introduced from the side of the drilling box. When water leaks in the water supply to the drilling rig, it cannot be detected until pressurized water leaks from the oil chamber seal. By then, all the lubricating grease inside the drilling rig has been contaminated.

[0007] 4. Under different working conditions, drilling rigs need to be matched with different drill rods or drilling tools. Frequent disassembly and assembly of the drilling rig connecting sleeve can easily cause wear on the drill rod. At the same time, a single drill rod joint cannot meet the matching needs of various working conditions, resulting in poor versatility. Summary of the Invention

[0008] The purpose of this invention is to provide a self-draining multi-functional drill box and anchor drilling machine. After the water seal fails, the drill box will drain water automatically, making maintenance and repair convenient, easy to detect and replace, and protecting the system oil chamber from contamination.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A self-draining multi-functional drill box includes a drill box body and a front housing connected to each other; a rotating shaft is provided inside the drill box body and the front housing; the rotating shaft is rotatably mounted on the drill box body via bearings; an oil cavity is formed between the drill box body and the rotating shaft; an oil seal and a skeleton seal ring are provided between the drill box body and the rotating shaft, and the oil seal abuts against the end face of the front housing; one end of the oil cavity is sealed by the oil seal, and the other end of the oil cavity is sealed by the skeleton seal ring;

[0011] The front housing and the rotating shaft are provided with a water supply cavity, a water discharge cavity, and at least two sets of water sealing assemblies; the water discharge cavity is located on the side of the water supply cavity near the drill box body, and at least one set of water sealing assemblies is provided between the water supply cavity and the water discharge cavity; at least one set of oil sealing components is provided between the water discharge cavity and the oil cavity;

[0012] The front housing is provided with a first drain hole and a second drain hole; the first drain hole and the second drain hole are connected to the drain cavity; the first drain hole is provided with a one-way valve; the second drain hole is provided with a filter.

[0013] The front housing is provided with a water inlet; the water inlet is connected to the water delivery cavity through a first water delivery hole; the rotating shaft is provided with a water outlet; the water outlet is connected to the water delivery cavity through a second water delivery hole; a connecting sleeve for installing drilling tools is detachably connected to the front housing; the water outlet is connected to the connecting sleeve.

[0014] Preferably, the water delivery cavity is disposed between the two water-sealing assemblies.

[0015] Preferably, the water seal assembly is configured as a single water seal ring, multiple water seal rings of the same type, or multiple water seal rings of different types.

[0016] Preferably, the first drain hole, the second drain hole, and the drain cavity are pre-filled with grease through a one-way valve; the bearing is disposed in the oil cavity; and the side wall of the drill box is provided with a grease fitting for adding lubricating oil to the oil cavity.

[0017] Preferably, the rotating shaft and the connecting sleeve are connected by a thread.

[0018] Preferably, the connecting sleeves on the front housing are configured with various specifications; each specification of connecting sleeve is provided with mounting holes for the corresponding drilling tool.

[0019] Preferably, a fixed ring is provided on the rotating shaft; a pressure plate with a fixed connecting sleeve is bolted to the fixed ring; an annular protrusion is provided on the connecting sleeve; the annular protrusion is located between the fixed ring and the pressure plate.

[0020] Preferably, a dustproof ring is provided between the rotating shaft and the front housing; the dustproof ring is located on the side of the front housing near the pressure plate.

[0021] Preferably, the drain cavity and the water supply cavity are arranged in a ring shape, and the drain cavity and the water supply cavity are arranged around the rotation axis.

[0022] Preferably, the hole through which the rotating shaft and the connecting sleeve fit together is a quadrilateral, the outer surface of the connecting sleeve is an octagon, and the diagonal of the octagon is greater than the side length of the quadrilateral of the inner hole of the rotating shaft.

[0023] In a second aspect, the present invention provides an anchor drilling machine, including a mounting frame, a drive mechanism, a slide table, and a drill box; the slide table is slidably connected to the mounting frame; the drive mechanism drives the slide table to slide; the drill box is disposed on the slide table, and a motor is provided on the slide table, the motor driving a rotating shaft inside the drill box to rotate.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0025] In this invention, a water supply cavity, a water discharge cavity, and at least two sets of water sealing assemblies are provided between the front housing and the rotating shaft. The water discharge cavity is located on the side of the water supply cavity near the drill box body, and at least one set of water sealing assemblies is provided between the water supply cavity and the water discharge cavity. When the water sealing assembly between the water supply cavity and the water discharge cavity is damaged, water enters the water discharge cavity and is discharged from the drill box through the second drain hole and finally through the filter. After the water sealing assembly fails, the drill box performs self-drainage. The filter facilitates the detection of whether the water sealing assembly is damaged, while protecting the bearings and oil chambers inside the drill box from contamination. Attached Figure Description

[0026] Figure 1 This is a horizontal cross-sectional view of a self-draining multifunctional drill box provided by the present invention;

[0027] Figure 2 This invention provides Figure 1 A cross-sectional view along the AA direction;

[0028] Figure 3 This is a vertical sectional view of a modular anchor drilling rig provided by the present invention;

[0029] In the diagram: 1. Drill box body, 2. Front housing, 3. Rotating shaft, 31. Fixing ring, 32. Pressure plate, 4. Connecting sleeve, 41. Mounting hole, 42. Annular protrusion, 5. Bearing, 6. Water supply cavity, 61. Second water supply hole, 62. Water outlet, 63. First water supply hole, 7. Drain cavity, 71. One-way valve, 72. First drain hole, 73. Second drain hole, 74. Filter, 8. Water seal assembly, 81. First water seal ring, 82. Second water seal ring, 9. Dustproof ring, 10. Oil seal assembly, 11. Water inlet, 12. Oil cavity, 13. Grease nipple, 14. Skeleton seal. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0031] It should be noted that in the description of this invention, the terms "front," "rear," "left," "right," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "front," "rear," "left," "right," "upper," and "lower" used in the description of this invention refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] Example 1

[0033] like Figures 1 to 3 As shown, a self-draining multi-functional drill box includes a drill box body 1 and a front housing 2 connected to each other; a rotating shaft 3 is provided inside the drill box body 1 and the front housing 2; the rotating shaft 3 is rotatably mounted on the drill box body 1 via a bearing 5; an oil cavity 12 is formed between the drill box body 1 and the rotating shaft 3; the bearing 5 is disposed in the oil cavity 12; a grease nipple 13 for adding lubricating oil to the oil cavity 12 is provided on the side wall of the drill box body 1; an oil seal 10 and a skeleton sealing ring 14 are provided between the drill box body 1 and the rotating shaft 3, and the oil seal 10 abuts against the end face of the front housing 2; one end of the oil cavity 12 is sealed by the oil seal 10, and the other end of the oil cavity 12 is sealed by the skeleton sealing ring 14;

[0034] A water supply cavity 6, a water discharge cavity 7, and at least two sets of water sealing assemblies 8 are provided between the front housing 2 and the rotating shaft 3; the water discharge cavity 7 and the water supply cavity 6 are arranged in annular shape and surround the rotating shaft 3; the water discharge cavity 7 is located on the side of the water supply cavity 6 near the drill box 1, and at least one set of water sealing assemblies 8 is provided between the water supply cavity 6 and the water discharge cavity 7; at least one set of oil seals 10 is provided between the water discharge cavity 7 and the oil cavity 12 for isolation and sealing; the water supply cavity 6 is located between the two water sealing assemblies 8; the water sealing assembly 8 is configured as a single water sealing ring or multiple water sealing rings of the same type or multiple water sealing rings of different types. In this embodiment, the water sealing assembly 8 includes a first water sealing ring 81 and a second water sealing ring 82; the first water sealing ring 81 and the second water sealing ring 82 are sleeved on the rotating shaft 3.

[0035] The front housing 2 is provided with a first drain hole 72 and a second drain hole 73; the first drain hole 72 and the second drain hole 73 are connected to the drain cavity 7; the first drain hole 72 is provided with a one-way valve 71; the second drain hole 73 is provided with a filter 74, which can pass gas and fluid, but cannot pass solids; the first drain hole 72, the second drain hole 73 and the drain cavity 7 are pre-filled with grease through the one-way valve 71.

[0036] The front housing 2 is provided with a water inlet 11; the water inlet 11 is connected to the water delivery cavity 6 through a first water delivery hole 63, which is located on the front housing 2; the rotating shaft 3 is provided with a water outlet 62; the water outlet 62 is connected to the water delivery cavity 6 through a second water delivery hole 61, and is located on the rotating shaft 3; a connecting sleeve 4 for installing drilling tools is detachably connected to the front housing 2; the water outlet 62 is connected to the connecting sleeve 4.

[0037] When the water seal assembly 8 between the water supply cavity 6 and the drain cavity 7 is damaged, water enters the drain cavity 7 and is discharged from the drill box through the second drain hole 73 and finally through the filter 74. After the water seal assembly 8 fails, the drill box will drain water by itself. The filter 8 makes it easy to find out whether the water seal assembly is damaged, and at the same time protects the bearings in the drill box from being contaminated.

[0038] The hole through which the rotating shaft 3 and the connecting sleeve 4 fit together is quadrilateral, and the outer surface of the connecting sleeve 4 is octagonal, with the diagonal of the octagon being greater than the side length of the quadrilateral of the inner hole of the rotating shaft 3. The connecting sleeve 4 on the front housing 2 is available in various specifications; each specification of connecting sleeve 4 has a mounting hole 41 for the corresponding drilling tool, facilitating the installation of different specifications of drilling tools; the rotating shaft 3 is provided with a fixing ring 31; a pressure plate 32 for fixing the connecting sleeve is bolted to the fixing ring 31; an annular protrusion 42 is provided on the connecting sleeve; the annular protrusion 42 is located between the fixing ring 31 and the pressure plate 32; a dustproof ring 9 is provided between the rotating shaft 3 and the front housing 2; the dustproof ring 9 is located on the side of the front housing 2 closest to the pressure plate 32; the connecting sleeve 4 is disassembled and reconnected via the pressure plate, facilitating replacement and maintenance after wear.

[0039] Example 2

[0040] An anchor drilling rig includes a mounting frame, a drive mechanism, a slide table, and a drilling box as described in Embodiment 1; the slide table is slidably connected to the mounting frame; the drive mechanism drives the slide table to slide; the drilling box is mounted on the slide table, and a motor is provided on the slide table, the motor driving a rotating shaft inside the drilling box to rotate.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A self-draining, multi-functional drilling box, characterized in that, It includes a drill housing and a front housing that are connected to each other; a rotating shaft is disposed inside the drill housing and the front housing; the rotating shaft is rotatably mounted on the drill housing via a bearing; an oil cavity is formed between the drill housing and the rotating shaft; an oil seal is provided between the drill housing and the rotating shaft, and the oil seal abuts against the end face of the front housing; A water supply cavity, a water discharge cavity, and at least two sets of water sealing assemblies are provided between the front housing and the rotating shaft; the water discharge cavity and the water supply cavity are arranged in annular shape and surround the rotating shaft; the water discharge cavity is located on the side of the water supply cavity near the drill box body, and at least one set of water sealing assemblies is provided between the water discharge cavity and the water supply cavity; at least one set of oil sealing elements is provided between the water discharge cavity and the oil cavity; The front housing is provided with a first drain hole and a second drain hole; the first drain hole and the second drain hole are connected to the drain cavity; the first drain hole is provided with a one-way valve; the second drain hole is provided with a filter; the first drain hole, the second drain hole and the drain cavity are pre-filled with grease through the one-way valve. The front housing is provided with a water inlet; the water inlet is connected to the water delivery cavity through a first water delivery hole; the rotating shaft is provided with a water outlet; the water outlet is connected to the water delivery cavity through a second water delivery hole; a connecting sleeve for installing drilling tools is detachably connected to the front housing; the water outlet is connected to the connecting sleeve.

2. The self-draining multi-functional drill box according to claim 1, characterized in that, The water delivery cavity is located between the two water-sealing components.

3. The self-draining multi-functional drill box according to claim 1, characterized in that, The water seal assembly is configured as a single water seal ring, multiple water seal rings of the same type, or multiple water seal rings of different types.

4. The self-draining multi-functional drill box according to claim 1, characterized in that, The bearing is disposed inside the oil cavity; the side wall of the drill box is provided with a grease nipple for adding lubricating oil to the oil cavity.

5. A self-draining multi-functional drilling box according to claim 1, characterized in that, The connecting sleeves on the front housing are available in various sizes; each size of connecting sleeve has mounting holes for the corresponding drilling tool.

6. A self-draining multi-functional drill box according to claim 1 or claim 5, characterized in that, A fixed ring is provided on the rotating shaft; a pressure plate with a fixed connecting sleeve is bolted to the fixed ring; an annular protrusion is provided on the connecting sleeve; the annular protrusion is located between the fixed ring and the pressure plate.

7. A self-draining multi-functional drill box according to claim 6, characterized in that, The hole through which the rotating shaft and the connecting sleeve are fitted is a quadrilateral, and the outer surface of the connecting sleeve is an octagon, with the diagonal of the octagon being greater than the side length of the quadrilateral in the inner hole of the rotating shaft.

8. A self-draining multi-functional drill box according to claim 6, characterized in that, A dustproof ring is provided between the rotating shaft and the front housing; the dustproof ring is located on the side of the front housing near the pressure plate.

9. An anchor drilling machine, characterized in that, The device includes a mounting frame, a drive mechanism, a slide table, and a drill box as described in any one of claims 1 to 8; the slide table is slidably connected to the mounting frame; the drive mechanism drives the slide table to slide; the drill box is disposed on the slide table, and a motor is provided on the slide table, the motor driving the rotating shaft inside the drill box to rotate.

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