Reamer bit convenient to replace

Abstract

A reamer bit convenient to replace solves the problem that an existing reamer is high in replacement and maintenance cost and comprises a connecting part, a middle part is detachably connected to the connecting part, a coring bit is detachably connected to the middle part, a coreless bit is detachably connected to the upper end of the connecting part, and the coring bit and the coreless bit are coaxial. Compared with the prior art, the utility model has the following beneficial effects: (1) the drill bit is formed by connecting and combining the conventional standard coring drill bit and the coreless drill bit through the reamer, and can meet the construction requirements of various specifications of hole diameters in drilling construction, so that the reaming diameter can be freely changed, the drill bit can be used as a reaming drill bit, special customization is not needed, the time is saved, and the construction efficiency is improved; cost is reduced, and replacement and maintenance are convenient; (2) the coreless drill bit is used as a guide unit, so that the accuracy of the reaming direction can be ensured; and (3) the units are in threaded connection and are more convenient to disassemble and maintain, and the coring drill bit and the coreless drill bit are both conventional standard parts and are more convenient to take and use.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling and reaming, in particular to a reaming bit that is convenient to replace. Background Art

[0002] When using a drilling rig to form a hole, generally a standard drill bit is used for drilling, and then a reaming drill is used for reaming. The reaming drill needs to be specially customized, and once the reaming drill is damaged and cannot be repaired, the cost is extremely high.

[0003] The application number is 202121417385.3, a rotary drilling reaming bit, which includes a bit body. The bit body is cylindrical, and several drill teeth are provided on the bit body. Several groups of reaming mechanisms are provided on the bit body. The reaming mechanism is composed of a fixed part and a reaming part. The reaming part is inserted into the fixed part. Reaming teeth are provided on the reaming part. The distance between the reaming teeth and the central axis of the bit body is greater than the cross-sectional radius of the bit body. A reaming mechanism composed of a fixed part and a reaming part is added to the traditional bit body. First, the fixed part is fixed on the bit body, and then the reaming part is inserted into the fixed part. Reaming teeth are provided on the reaming part. By adopting the above design, during the construction of a rotary drilling pile hole, reaming can be achieved by installing the reaming mechanism.

[0004] However, it also has deficiencies: (1) Adding a reaming mechanism to the bit body will undoubtedly increase the cost of the equipment; (2) Plug-in fixation requires a tight fit. When replacing it later, there will be problems such as loose fit, affecting subsequent normal use. Content of the Utility Model

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a reaming bit that is convenient to replace, and solves the problem of the high replacement and repair cost of the current reamer.

[0006] The utility model solves the technical problem through the following technical means. A reaming bit that is convenient to replace includes a connecting part. A middle part is detachably connected to the connecting part. A core bit is detachably connected to the middle part. An empty-core bit is detachably connected to the upper end of the connecting part. The core bit and the empty-core bit are coaxial.

[0007] Preferably, the connecting part is a hollow connecting rod, and the lower end of the connecting rod is detachably connected to the drill pipe of the drilling rig.

[0008] Preferably, an internal thread is provided at the lower end of the connecting part, and the connecting part is threadedly connected to the drilling rig through the internal thread.

[0009] Preferably, the lower part of the connecting part is threadedly connected to the middle part.

[0010] Preferably, the middle part is a hollow sleeve. The lower end of the sleeve is provided with internal threads, and the lower part of the connecting part is provided with external threads. The sleeve is threadedly connected to the connecting part.

[0011] Preferably, the middle part is threadedly connected to the core drill bit.

[0012] Preferably, the upper end of the middle part is provided with internal threads, and the lower end of the core drill bit is provided with external threads.

[0013] Preferably, the upper end of the connecting part is threadedly connected to the coreless drill bit.

[0014] Preferably, a tapered table is fixed to the upper end of the connecting part. External threads are provided on the tapered table, a tapered hole is provided inside the coreless drill bit, and internal threads are provided in the tapered hole.

[0015] Preferably, the upper end of the connecting part is provided with a water spraying hole, and the water spraying hole communicates with the inside of the connecting part.

[0016] Compared with the prior art, the present utility model has the following advantages: (1) Using a conventional standard core drill bit for reaming, there is no need for special customization, thus saving time and reducing costs, and it is convenient for replacement and maintenance; (2) The coreless drill bit is used as a guiding unit, so as to ensure the accuracy of the reaming direction; (3) The threaded connection between each unit makes disassembly and maintenance more convenient, and both the core drill bit and the coreless drill bit are conventional standard parts, which are more convenient to obtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is an exploded schematic diagram of the present utility model;

[0020] Figure 3 is a schematic diagram of the structure of the connecting part of the present utility model;

[0021] In the figure: 1, connecting part; 2, middle part; 3, core drill bit; 4, coreless drill bit; 5, water spraying hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes in detail the specific embodiments of the present utility model in conjunction with the attached Figures 1 - 3 Drawings.

[0023] Such as Figures 1 - 3As shown in the figure, a reaming bit that is convenient to replace includes a connecting part 1. A middle part 2 is detachably connected to the connecting part 1. A core drill bit 3 is detachably connected to the middle part 2. A coreless drill bit 4 is detachably connected to the upper end of the connecting part 1. The core drill bit 3 and the coreless drill bit 4 are coaxial.

[0024] In this device, there is no need to specifically customize a reaming bit. The reaming function can be achieved by using a conventional standard core drill bit 3. Connect the connecting part 1 of this device to the drill rig. The coreless drill bit 4 plays a guiding role and travels along the already drilled hole. The core drill bit 3 performs corresponding reaming. Since the core drill bit 3 and the coreless drill bit 4 are both conventional standard parts and their sizes can be adjusted, this device has great versatility. In addition, when the core drill bit 3 is damaged, it can be directly replaced, which is convenient and fast, and the maintenance cost is quickly reduced.

[0025] The connecting part 1 is a hollow connecting rod, and the lower end of the connecting rod is detachably connected to the drill pipe of the drill rig.

[0026] There are holes in the lower part of the connecting rod, and the upper part of the connecting rod is a closed structure. The part of the drill pipe of the drill rig connected to the coreless drill bit 4 can be directly connected to the connecting rod.

[0027] The lower end of the connecting part 1 is provided with internal threads, and the connecting part 1 is threadedly connected to the drill rig through the internal threads.

[0028] The hole inside the lower end of the connecting part 1 is a tapered hole, so as to cooperate with the tapered connecting platform of the drill rig itself for connection. The two are connected by threads, so that rapid disassembly and replacement can be carried out.

[0029] The lower part of the connecting part 1 is threadedly connected to the middle part 2.

[0030] In this device, the middle part 2 serves as a connecting unit. The core drill bit 3 and the connecting part 1 are connected together through the middle part 2, and the axes of the two can be ensured to coincide, so as to ensure the reaming accuracy.

[0031] The middle part 2 is a hollow sleeve. The lower end of the sleeve is provided with internal threads, and the lower part of the connecting part 1 is provided with external threads. The sleeve is threadedly connected to the connecting part 1.

[0032] The sleeve is hollow, and through the cooperation of internal and external threads, the sleeve is connected to the connecting part 1 together.

[0033] The middle part 2 is threadedly connected to the core drill bit 3.

[0034] The upper end of the middle part 2 is provided with internal threads, and the lower end of the core drill bit 3 is provided with external threads.

[0035] The upper end of the casing is provided with an internal thread that mates with the core bit 3, and the core bit 3 is connected to the casing through the thread, facilitating subsequent disassembly.

[0036] The upper end of the connecting portion 1 is threadedly connected to the coreless bit 4.

[0037] A tapered table is fixed to the upper end of the connecting portion 1. The tapered table is provided with an external thread, and the coreless bit 4 is internally provided with a tapered hole, and the tapered hole is provided with an internal thread.

[0038] The coreless bit 4 is a conventional standard part. Through the tapered table, the threaded connection with the coreless bit 4 is realized, facilitating subsequent disassembly.

[0039] The upper end of the connecting portion 1 is provided with a water spray hole 5, and the water spray hole 5 communicates with the inside of the connecting portion 1.

[0040] A plurality of water spray holes 5 are provided, and the water spray holes 5 are evenly distributed along the circumference of the connecting portion 1.

[0041] In this device, through the connection and cooperation relationship among the connecting portion 1, the intermediate portion 2, the core bit 3, and the coreless bit 4, the function of quick-disassembly maintenance is realized. The core bit 3 is used for reaming, so that there is no need to specially customize a reaming bit, and different-diameter core bits can be selected for combination according to the construction requirements, realizing free transformation of the bit diameter, thereby saving the maintenance cost.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A conveniently replaceable reaming drill bit, characterized in that: The invention comprises a connecting portion (1), the connecting portion (1) is detachably connected to an intermediate portion (2), the intermediate portion (2) is detachably connected to a coring drill bit (3), the upper end of the connecting portion (1) is detachably connected to a coreless drill bit (4), and the coreless drill bit (3) and the coreless drill bit (4) are coaxial.

2. The easily replaceable reaming drill bit according to claim 1, characterized in that: The connecting portion (1) is a hollow connecting rod, the lower end of which is detachably connected to a drill rod of a drilling rig.

3. A conveniently replaceable reaming drill bit according to claim 1 or 2, characterized in that: The lower end of the connecting portion (1) is provided with an internal thread, and the connecting portion (1) is threadably connected to the drilling rig via the internal thread.

4. The easily replaceable reaming drill bit according to claim 1, characterized in that: The lower part of the connecting portion (1) is threadedly connected to the middle portion (2).

5. A conveniently replaceable reaming drill bit according to claim 1 or 4, characterized in that: The middle part (2) is a hollow sleeve, the lower end of the sleeve is provided with an internal thread, the lower part of the connecting part (1) is provided with an external thread, and the sleeve is threadedly connected to the connecting part (1).

6. The easily replaceable reaming drill bit according to claim 1, characterized in that: The middle part (2) is threadedly connected to the coring drill bit (3).

7. The easily replaceable reaming drill bit according to claim 6, characterized in that: The upper end of the middle part (2) is provided with an internal thread, and the lower end of the core drill bit (3) is provided with an external thread.

8. The easily replaceable reaming drill bit according to claim 1, characterized in that: The upper end of the connecting portion (1) is threadedly connected to the coreless drill bit (4).

9. The easily replaceable reaming drill bit according to claim 8, characterized in that: A conical platform is fixed at the upper end of the connecting portion (1), and an external thread is provided on the conical platform. A conical hole is provided inside the coreless drill bit (4), and the conical hole is provided with an internal thread.

10. The easily replaceable reaming drill bit according to claim 1, characterized in that: A water spray hole (5) is provided at the upper end of the connecting portion (1), and the water spray hole (5) is communicated with the interior of the connecting portion (1).

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