Suction drill tool and sleeper suction drill device

Abstract

The suction drilling tool comprises a tool body, first tool bits and second tool bits, the tool body is through in the axial direction, the first tool bits are located at one end of the tool body in the axial direction, the multiple first tool bits are arranged in a surrounding mode in the circumferential direction, a first dust suction opening is formed between every two adjacent first tool bits, and a second dust suction opening is formed between every two adjacent second tool bits. The second tool bits protrude outwards on the outer wall of the tool body in the radial direction, the multiple second tool bits are arranged in a surrounding mode in the circumferential direction, and second dust suction openings are formed in the side wall of the tool body and located between the adjacent second tool bits. The distance between the outer wall face of the cutter body and the annular hole is increased through the widening effect of the second cutter head, so that more external air can enter the annular hole more smoothly and then enter the cutter body with dust, and therefore the suction effect of the dust can be improved through the suction drill tool. The utility model relates to the field of bolt heavy anchoring.

Description

Technical Field

[0001] This application relates to the field of bolt anchoring, and in particular to a drill bit and a sleeper drill bit suction device. Background Technology

[0002] The anchor bolts of railway sleepers need to be replaced when they fail. In early related technologies, a vertical hollow drill bit was used to drill through the sulfur anchoring mortar around the bolt to separate the bolt from the sleeper. Since the bolt was anchored with sulfur, the sulfur dust generated during drilling would form a paste under the friction of the high-speed rotating hollow drill bit, which could easily cause the electric drill to seize up and get stuck.

[0003] To address this, some related technologies (such as Chinese Patent 201520010602.5) have designed a suction drill with a suction function. By suctioning the hollow drill bit during drilling, the generated sulfur dust can be discharged in a timely manner, reducing the risk of sulfur accumulating and forming a paste. This helps to increase the rotation speed of the drill bit and improve the efficiency of sleeper operations.

[0004] However, the suction drill bit used in the relevant technology still has certain defects. Specifically, because the gap between the drill bit and the drilled annular hole is relatively narrow, it is difficult to efficiently and fully remove the generated dust, resulting in the risk of the drill getting stuck or seizing. Utility Model Content

[0005] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a suction drill bit and a sleeper suction drill device, which helps to improve the dust suction effect.

[0006] The suction drill bit provided in this application includes a cutter body, a first cutter head, and a second cutter head. The cutter body extends through the axial direction. The first cutter head is located at one end of the cutter body in the axial direction. A plurality of first cutter heads are arranged circumferentially. A first dust suction port is formed between adjacent first cutter heads. The second cutter head protrudes outward in the radial direction from the outer wall of the cutter body. A plurality of second cutter heads are arranged circumferentially. A second dust suction port is provided on the side wall of the cutter body. The second dust suction port is located between adjacent second cutter heads.

[0007] The suction drill bit provided in this application has at least the following technical effects: the suction drill bit drills sulfur anchoring mortar through a first cutting head and then sucks it in through a channel inside the drill body. Some of the dust generated by the first cutting head can be sucked away through the first dust suction port; the second cutting head can further widen the drilled annular hole, and the remaining dust generated by the first cutting head and the dust generated by the second cutting head can be sucked away through the second dust suction port; the widening effect of the second cutting head increases the distance between the outer wall of the drill body and the annular hole, allowing more and smoother external air to enter the annular hole and then carry the dust into the interior of the drill body. Therefore, the suction drill bit helps to improve the dust suction effect.

[0008] According to some embodiments of this application, the suction drill bit further includes a third cutting head, which protrudes radially inward from the inner wall of the drill body, and a plurality of the third cutting heads are arranged circumferentially.

[0009] According to some embodiments of this application, the suction drill bit includes a first insert, which is welded to the end of the drill body, and the first insert forms the first drill head.

[0010] According to some embodiments of this application, the suction drill bit includes a second insert, which is inserted through and welded to the side wall of the drill body, and the second insert forms the second cutting head and the third cutting head.

[0011] According to some embodiments of this application, the first insert and the second insert use diamond impregnated inserts.

[0012] According to some embodiments of this application, the height of the second blade protrusion is between 3mm and 5mm, and the height of the third blade protrusion is between 3mm and 5mm.

[0013] According to some embodiments of this application, the suction drill bit includes a plurality of second suction ports, and the size of each second suction port gradually decreases along the direction away from the first drill head.

[0014] According to some embodiments of this application, in the axial direction, the minimum distance from the second suction port to the first cutter head is less than the minimum distance from the second cutter head to the first cutter head.

[0015] According to some embodiments of this application, the suction drill bit is provided with a thread at the other end in the axial direction, and the thread is used to connect to a hollow spindle.

[0016] The sleeper suction drill device provided in this application includes the suction drill bit of this application.

[0017] The sleeper suction drill device provided in this application includes the suction drill bit of this application, and therefore has the beneficial effects produced by the suction drill bit, which will not be described in detail here. Attached Figure Description

[0018] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and form part of the specification. They are used together with the embodiments disclosed in this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0019] Figure 1 This is an isometric structural diagram of the suction drill bit according to an embodiment of this application;

[0020] Figure 2 This is a front view schematic diagram of the drill bit according to an embodiment of this application;

[0021] Figure 3 This is a top view of the drill bit of the present application embodiment.

[0022] Figure label:

[0023] Blade body 110, first blade head 120, second blade head 130, first dust suction port 140, second dust suction port 150, third blade head 160. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Dust generated during the drilling of sleeper bolts can easily cause problems such as stuck drill bits and seizing, leading to damage to the drill bit and a decrease in drilling efficiency. To address this, some related technologies have designed sleeper suction drill devices that can extract dust while drilling. Under negative pressure, external gas carries dust into the interior of the hollow drill bit and is then sucked away along the axis of the drill bit.

[0030] However, the suction drill bit in the relevant technology suffers from poor gas flow, making it difficult to smoothly and promptly remove newly generated dust. Part of the reason for this is that the distance between the wall of the drilled annular hole and the suction drill bit is too close, resulting in limited gas flow.

[0031] To address this issue, some related technologies (such as Chinese Patent 201520010602.5) involve slightly misaligning the tip of the suction drill bit in the radial direction, thereby creating a larger gap between the drilled wall and the drill body, so that external airflow can be drawn into the suction drill bit along the gap.

[0032] However, since the larger the cutter head, the greater the load during drilling, the size of the cutter head is limited. The gap width drilled in this way is limited and cannot fully meet the air intake requirements during suction. Therefore, further optimization and improvement are still needed.

[0033] Reference Figure 1 and Figure 2 According to an embodiment of this application, a suction drill bit includes a cutter body 110, a first cutter head 120, and a second cutter head 130. The cutter body 110 extends axially, and the first cutter head 120 is located at one end of the cutter body 110 in the axial direction. A plurality of first cutter heads 120 are arranged circumferentially, and a first dust suction port 140 is formed between adjacent first cutter heads 120. The second cutter head 130 protrudes radially outward from the outer wall of the cutter body 110, and a plurality of second cutter heads 130 are arranged circumferentially. A second dust suction port 150 is provided on the side wall of the cutter body 110, and the second dust suction port 150 is located between adjacent second cutter heads 130.

[0034] The suction drill bit drills sulfur anchoring mortar through the first cutter head 120 and is sucked away through the channel inside the cutter body 110. Some of the dust generated by the first cutter head 120 can be sucked away through the first dust suction port 140. The second cutter head 130 can further widen the drilled annular hole. The remaining dust generated by the first cutter head 120 and the dust generated by the second cutter head 130 can be sucked away through the second dust suction port 150.

[0035] First, the widening effect of the second cutting head 130 increases the distance between the outer wall of the cutting body 110 and the annular hole, allowing more and smoother external air to enter the annular hole and then carry the dust into the interior of the cutting body 110. Therefore, the suction drill bit helps to improve the dust suction effect.

[0036] Secondly, since the wall surface is widened by a second cutting head 130, compared with a larger first cutting head 120, the heat is more dispersed and the load is relatively smaller during drilling, making it less prone to failure. It is also suitable for obtaining higher drilling speeds at the same power.

[0037] Optionally, to facilitate smoother gas flow, in some embodiments, reference is made to... Figure 3 The drill bit also includes a third cutting head 160, which protrudes radially inward from the inner wall of the cutter body 110, and multiple third cutting heads 160 are arranged circumferentially.

[0038] The widening effect of the third cutter head 160 increases the distance between the inner wall surface of the cutter body 110 and the annular hole, allowing the airflow entering the cutter body 110 to be discharged more smoothly along the cutter body 110, thus avoiding blockage.

[0039] The first cutting head 120, the second cutting head 130, and the third cutting head 160 can be set on the cutting body 110 in different ways.

[0040] For example, in some embodiments, the suction drill bit includes a first insert welded to the end of the cutter body 110, the first insert forming a first cutter head 120.

[0041] Similarly, in some embodiments, the drill bit includes a second insert that passes through and is welded to the sidewall of the cutter body 110, forming a second cutter head 130 and a third cutter head 160.

[0042] Understandably, if the second cutting head 130 and the third cutting head 160 are independent of each other, it would be difficult to set the third cutting head 160 on the inner wall. By integrating the second cutting head 130 and the third cutting head 160 onto the second insert, it is easier to process and helps to simplify the structural design of the guzzler drill bit.

[0043] To ensure the drilling capability of the drill bit, in some embodiments, the first and second inserts are diamond-impregnated inserts. The diamond-impregnated inserts contain diamond encapsulated within a metal matrix. The first and second inserts expose the diamond through wear, and drilling can be efficiently completed by the diamond scratching and breaking up the solidified slurry.

[0044] To improve durability, alternatively, multiple second cutting heads 130 and multiple third cutting heads 160 can be provided, that is, multiple second inserts can be provided circumferentially, thereby reducing the wear of individual second inserts and improving the service life of the drill bit.

[0045] It is understandable that increasing the height of the protrusion can create a wider gap, which is beneficial to the flow of air. However, it will also increase the load on the drill bit during drilling. In order to balance the performance requirements of both aspects, in some embodiments, the height of the second cutting head 130 protrusion is between 3mm and 5mm, and the height of the third cutting head 160 protrusion is between 3mm and 5mm.

[0046] To ensure that dust can be fully discharged, in some embodiments, the suction drill bit includes a plurality of second suction ports 150, and, in particular, the second suction ports 150 can be designed such that the size of each second suction port 150 gradually decreases along the direction away from the first drill bit 120.

[0047] Furthermore, in order to ensure that the dust generated during the reaming process of the second cutter head 130 can enter the second dust suction port 150 as quickly as possible, in some embodiments, refer to Figure 2 In the axial direction, the minimum distance L1 between the second suction port 150 and the first cutter head 120 is less than the minimum distance L2 between the second cutter head 130 and the first cutter head 120.

[0048] In some embodiments, the drill bit has a thread at the other end in the axial direction, the thread being used to connect to a hollow spindle.

[0049] This application also provides a sleeper suction drill device, which includes the suction drill bit of this application.

[0050] The sleeper suction drill device has the same beneficial effects as the suction drill bit, which will not be elaborated here.

[0051] Understandably, the sleeper suction drill device has a rotatable spindle, on which the suction drill bit is directly or indirectly mounted and rotates for drilling under the drive of the spindle. The spindle has a hollow structure, and its interior is connected to the interior of the suction drill bit. The spindle is also connected to a negative pressure generating device, so dust passes through the suction drill bit and the spindle before being discharged.

[0052] The sleeper suction drill device can be a flexible handheld type or a more stable base type; this application makes no limitation on this.

[0053] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order shown in the operation diagrams. For example, depending on the functions / operations involved, two consecutively shown blocks may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order. Furthermore, the embodiments presented and described in the flowcharts of this application are provided by way of example to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and sub-operations described as part of a larger operation are executed independently.

[0054] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A drill bit with suction function, characterized in that, include: The blade body extends axially; The first cutter head is located at one end of the cutter body in the axial direction, and a plurality of first cutters head are arranged circumferentially, with a first dust suction port formed between adjacent first cutters head; The second cutter head protrudes radially outward from the outer wall of the cutter body. Multiple second cutters are arranged circumferentially. A second dust suction port is provided on the side wall of the cutter body, and the second dust suction port is located between adjacent second cutters.

2. The drill bit according to claim 1, characterized in that, The drill bit also includes a third cutting head, which protrudes radially inward from the inner wall of the tool body, and a plurality of the third cutting heads are arranged circumferentially.

3. The drill bit according to claim 2, characterized in that, The drill bit includes a first insert, which is welded to the end of the cutter body and forms the first cutter head.

4. The drill bit according to claim 3, characterized in that, The suction drill bit includes a second insert, which is inserted through and welded to the side wall of the drill body, and forms the second cutting head and the third cutting head.

5. The drill bit according to claim 4, characterized in that, The first and second inserts are made of diamond impregnated inserts.

6. The drill bit according to claim 2, characterized in that, The height of the second cutting head protrusion is between 3mm and 5mm, and the height of the third cutting head protrusion is between 3mm and 5mm.

7. The drill bit according to claim 1, characterized in that, The suction drill bit includes multiple second suction ports, and the size of each second suction port gradually decreases along the direction away from the first drill head.

8. The drill bit according to claim 1, characterized in that, In the axial direction, the minimum distance from the second suction port to the first cutter head is less than the minimum distance from the second cutter head to the first cutter head.

9. The suction drill bit according to claim 1, characterized in that, The drill bit has a thread at the other end in the axial direction, and the thread is used to connect to the hollow spindle.

10. A sleeper suction drill device, characterized in that, The sleeper suction drill device includes the suction drill bit as described in any one of claims 1 to 9.

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