A drilling bit for engineering geology

Abstract

The utility model discloses an engineering geological drilling drill bit, belonging to the field of geological drilling equipment; it includes a drill barrel seat, a quick-release barrel and a drill tooth, the drill barrel seat is installed on a drill rod for use, one end of the quick-release barrel is detachably connected to the drill barrel seat, and the other end is provided with a plurality of drill teeth in a circular array, and the drill teeth are detachably connected to the quick-release barrel; the drill barrel seat includes a threaded barrel, a transition barrel and a prism barrel, and the threaded barrel is provided with a threaded structure for threaded connection with the drill rod; one end of the quick-release barrel is provided with a prism groove matching the outer shape structure of the prism barrel end, and a first bolt is connected between the prism barrel and the groove wall of the prism groove, the quick-release barrel is provided with an opposite end of one end of the prism groove, and each side wall thereof is provided with a tooth groove, the drill teeth are inserted in the tooth groove, and a second bolt is connected between the drill teeth and the quick-release barrel. The utility model can flexibly and conveniently replace the drill teeth, make full use of the drill bit structure, save costs, and reduce the workload.

Description

Technical Field

[0001] The utility model relates to a drill bit, in particular to an engineering geological drilling drill bit, belonging to the field of geological drilling equipment. Background Art

[0002] Engineering geology is the science of investigating, studying, and solving geological problems related to human activities and various types of engineering construction. The purpose of engineering geology is to find out the geological conditions of various types of engineering sites, conduct a comprehensive evaluation of the sites and various geological problems related to them, analyze and predict the possible changes and effects of geological conditions under the action of engineering construction, select the best site, and propose engineering measures to solve unfavorable geological problems, so as to provide a reliable scientific basis for ensuring the reasonable design, smooth construction and normal use of the project. The process of engineering geological research often involves geological exploration and drilling. Drilling refers to the use of certain drilling machinery and equipment and processes to exploit underground natural resources, or to take the actual profile of the strata and extract physical samples to provide experiments to obtain relevant data and information. In drilling, a drilling rig is needed to drill from the surface to form a cylindrical borehole. When the drilling rig drills downward, a drill bit is needed, and the drill bit rotates at high speed to cut soil and rock.

[0003] There are many types of drill bits, which are divided into full-bore drill bits, coring drill bits and special process drill bits (such as reaming drill bits, directional beveling drill bits, etc.) according to their functions. Coring drill bits are divided into roller core drill bits, scraper core drill bits and cylindrical core drill bits. Cylindrical core drill bits are commonly used drill bits for engineering geological drilling. They are composed of a thin-walled cylindrical drill bit body, a blade fixed to the bottom of the body and a threaded hollow drill shank fixed to the top of the body. The thin-walled cylindrical drill bit body and the threaded hollow drill shank are both made of metal materials. The blade is usually a cutting tooth made of cemented carbide, diamond and other materials arranged at intervals in a circle. The coring drill bit is usually screwed to the drill rod of the drilling rig through a thread to drill and coring or drill holes in the formation.

[0004] In the application process of cylindrical core drill bits, since the drill teeth only have a circle at the bottom, after long-term use, the drill teeth of the drill bit will be severely worn, while the rear section of the drill bit is still intact. However, a new drill bit has to be replaced, and the long cylindrical structure of the drill bit will cause waste of the rear section material of the drill bit. Some drill bits have some teeth that are worn out first or even accidentally broken during use (such as when drilling harder rocks or dams with uneven hardness). At this time, there are generally two ways to deal with it: one is to continue to use the damaged drill bit; the other is to replace it with a new drill bit. Continuing to use the damaged drill bit will cause other drill teeth to wear quickly and reduce work efficiency, affecting the progress of the project. The cost of replacing a new drill bit is too high, which increases the cost of drilling. In addition, since the drill bit is usually bulky and difficult to replace, it increases the workload of the staff. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides an engineering geological drilling drill bit.

[0006] The technical solution adopted by the utility model is: to design an engineering geological drilling drill bit, which includes a drill barrel seat, a quick-release barrel and drill teeth. The drill barrel seat is installed on the drill rod of the drilling rig for use and is threadedly connected to the drill rod. One end of the quick-release barrel is detachably connected to the drill barrel seat, and a plurality of drill teeth are arranged in a circular array at the other end. The drill teeth are detachably connected to the quick-release barrel.

[0007] Furthermore, the drill tube seat described in this design includes a threaded tube, a transition tube and a prismatic tube, which are connected in sequence and formed as one piece. The threaded tube is provided with a threaded structure for threaded connection with the drill rod, and the outside of the prismatic tube is a prismatic structure.

[0008] Furthermore, in the present design, one end of the quick-release barrel is provided with a prism groove matching the external structure of the prism barrel end, the prism groove extends from one end of the quick-release barrel to the middle of the quick-release barrel, the prism barrel is completely immersed in the prism groove and abuts against the bottom of the prism groove, a first bolt is connected between the prism barrel and the groove wall of the prism groove, and the quick-release barrel is connected to the drill barrel seat by the first bolt.

[0009] Furthermore, in the present design, at least one opposite side of the prism tube and at least one opposite side wall of the prism groove are respectively provided with connecting holes, the connecting holes of the two are arranged in one-to-one correspondence, and at least one of the connecting holes of the prism tube and the prism groove wall is a threaded hole, and the prism tube and the quick-release tube are connected by inserting a first bolt through the connecting hole.

[0010] Furthermore, the quick-release barrel of the present design is a prismatic structure, and the quick-release barrel, the exterior of the prismatic barrel, and the prismatic groove are all octagonal prism structures.

[0011] Furthermore, the quick-release barrel of the present design is provided with a tooth groove on each side wall at the opposite end of one end of the prismatic groove, the drill teeth are inserted into the tooth grooves, a second bolt is connected between the drill teeth and the quick-release barrel, and the drill teeth and the quick-release barrel are locked by the second bolt.

[0012] Furthermore, the thickness of the drill tooth in the present design exceeds the thickness of the wall of the quick-release barrel, and the middle of the drill tooth is inserted into the tooth groove, and the front and rear sides of the drill tooth extend out of the wall of the quick-release barrel respectively.

[0013] Furthermore, the quick-release barrel of the present design is provided with auxiliary drilling teeth on the outside of each side wall of one end of the prismatic groove, and the auxiliary drilling teeth are arranged at an inclination of 10-30° relative to the barrel wall of the quick-release barrel. The thickness of the auxiliary drilling teeth does not exceed the outer surface of the drilling teeth, and the connecting hole on the quick-release barrel passes through the corresponding auxiliary drilling teeth to form a countersunk hole.

[0014] Furthermore, the tooth groove of the present design includes a through groove penetrating the wall of the quick-release barrel and a limiting groove with a groove depth not exceeding half the thickness of the barrel wall. The drill tooth includes a through portion inserted into the through groove and a limiting portion clamped in the limiting groove, and also includes a tooth portion for drilling. The through portion, the limiting portion and the tooth portion are integrally formed, and the limiting portion and the bottom of the limiting groove are respectively provided with corresponding limiting holes, and the second bolt is threadedly connected in the limiting hole to connect the drill tooth to the quick-release barrel, and the limiting hole on the limiting portion is arranged as a countersunk hole or a countersunk hole structure.

[0015] Furthermore, the tooth portion of the present design is provided with M-shaped teeth.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model connects the drill teeth and the quick-release barrel in a detachable manner. If some of the drill teeth are severely worn or accidentally broken during operation, which only occurs in a minority of cases, the drill teeth can be directly replaced, and the drill bit can continue to be used. The drill teeth are simply and efficiently replaced. The drill bit after the drill teeth are replaced can better ensure the drilling efficiency and effect, and can also reduce the waste of the drill bit. The drill barrel seat is detachably connected to the quick-release barrel. If more drill teeth are severely worn or broken during operation (such as after long-term operation), the quick-release barrel can be directly and quickly replaced. The old quick-release barrel is removed and then replaced with a new quick-release barrel with drill teeth installed. This is more efficient and the drill barrel seat part of the drill bit can continue to be used.

[0018] In addition, the drill bit structure provided by the utility model adopts a three-section structure of a drill barrel seat, a quick-release barrel and drill teeth. You can choose to replace damaged drill teeth or replace all drill teeth according to actual conditions. Since each split structure is relatively light, the replacement process is also faster and more convenient, and the labor intensity is reduced. In addition, a large part of the drill bit can continue to be used, saving resources and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of an exploded view of the utility model.

[0021] Figure 2 It is a schematic diagram of the axonometric drawing of the utility model.

[0022] Figure 3 It is a schematic cross-sectional view of the utility model.

[0023] Figure 4 It is a schematic diagram of the quick-release barrel of the utility model.

[0024] Figure 5 It is a schematic diagram of the drill tooth of the utility model.

[0025] In the figure: 1. drill barrel seat; 2. quick-release barrel; 3. drill teeth; 4. threaded barrel; 5. transition barrel; 6. prismatic barrel; 7. prismatic groove; 8. first bolt; 9. connecting hole; 10. second bolt; 11. auxiliary drilling teeth; 12. through groove; 13. limit groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1-Figure 5As shown: an engineering geological drilling drill bit, including a drill barrel seat 1, a quick-release barrel 2 and drill teeth 3. The drill barrel seat 1 is installed on the drill rod of the drilling rig for use. The drilling rig and its drill rod are equipment in the prior art and will not be described in detail. The drill barrel seat 1 is threadedly connected to the drill rod, and the connection structure of the drill bit and the drill rod in the prior art can be used. One end of the quick-release barrel 2 is detachably connected to the drill barrel seat 1, and it is a quick-release and quick-install connection structure. The other end is provided with a plurality of drill teeth 3 in a circular array, and the drill teeth 3 are detachably connected to the quick-release barrel 2. The drill teeth 3 are detachably connected to the quick-release barrel 2. If some of the drill teeth 3 are severely worn or accidentally broken during operation, and this only occurs in a minority of cases, it is convenient to directly replace the drill teeth 3, and then the drill bit can continue to be used. The replacement of the drill teeth 3 is simple and efficient. After the drill teeth 3 are replaced, the drill bit can better ensure the drilling efficiency and effect, and can also reduce the waste of the drill bit. If more of the drill teeth 3 are severely worn or broken during operation (such as after long-term operation), the quick-release barrel 2 is directly and quickly replaced. The old quick-release barrel 2 is removed and then replaced with a new quick-release barrel 2 with the drill teeth 3 installed. This is more efficient and the drill barrel seat 1 part of the drill bit can continue to be used. Usually, the existing drill bits are bulky and require two people to cooperate in replacement. During the replacement process, the drill bit needs to be manually screwed onto the end of the drill rod, and then tightened with the help of other tools. The replacement process is time-consuming, labor-intensive, and labor-intensive. The drill bit structure provided in this embodiment can choose to replace damaged drill teeth 3 or replace all drill teeth 3 according to actual conditions. Since each split structure is relatively light, the replacement process is faster and more convenient, and the labor intensity is reduced. In addition, a large part of the drill bit can continue to be used, saving resources and costs.

[0030] Example 2

[0031] This embodiment is based on the embodiment 1, and further optimizes and refines the structure of the drill pipe seat 1, specifically:

[0032] The drill barrel seat 1 includes a threaded barrel 4, a transition barrel 5 and a prismatic barrel 6, which are connected in sequence and formed as one piece. The threaded barrel 4 is provided with a threaded structure for threaded connection with a drill rod. The exterior of the prismatic barrel 6 is a prismatic structure. The drill bits in the prior art all have smooth cylindrical surfaces, which makes it inconvenient for workers to rotate the drill bits to be threadedly connected with the drill rod. The prismatic barrel 6 structure of this embodiment makes it easy for workers to hold and rotate the drill barrel seat 1 without slipping, and is more convenient for connection, moving and other operations.

[0033] Example 3

[0034] This embodiment is based on the embodiment 2, and further optimizes and refines the structure of the quick release tube 2, specifically:

[0035] One end of the quick-release barrel 2 is provided with a prism groove 7 that matches the external structure of the end of the prism barrel 6. The prism groove 7 runs through one end of the quick-release barrel 2 to the middle of the quick-release barrel 2. The bottom of the prism groove 7 forms a step structure. The prism barrel 6 is completely immersed in the prism groove 7 and abuts against the bottom of the prism groove 7, which is convenient for quickly inserting the prism barrel 6 into place. A first bolt 8 is connected between the prism barrel 6 and the groove wall of the prism groove 7. The quick-release barrel 2 is connected to the drill barrel seat 1 by the first bolt 8. The drill barrel seat 1 and the quick-release barrel 2 are connected by a prismatic structure, and the installation is fast. During the use of the drill bit, the relative rotation limiting effect of the drill barrel seat 1 and the quick-release barrel 2 is more reliable. The first bolt 8 only needs to prevent the drill barrel seat 1 from being separated from the quick-release barrel 2 during the process of withdrawing the drill bit or lowering the drill bit.

[0036] Example 4

[0037] This embodiment is based on the embodiment 3, and further optimizes and refines the connection structure between the quick release tube 2 and the drill tube seat 1, specifically:

[0038] An opposite side wall of the prism tube 6 and an opposite side wall of the prism groove 7 are respectively provided with connecting holes 9, and the connecting holes 9 of the two are arranged one by one, and the connecting hole 9 of at least one of the prism tube 6 and the groove wall of the prism groove 7 is a threaded hole. The prism tube 6 and the quick-release tube 2 are connected by inserting a first bolt 8 in the connecting hole 9, and the connection is simple and convenient.

[0039] In this embodiment, the quick-release barrel 2 is a prismatic structure, and the quick-release barrel 2, the exterior of the prismatic barrel 6, and the prismatic groove 7 are all octagonal prismatic structures.

[0040] Example 5

[0041] This embodiment is based on the embodiment 4, and further optimizes and refines the structure of the quick release tube 2, specifically:

[0042] The quick-release barrel 2 is provided with a tooth groove at the opposite end of one end of the prismatic groove 7, and each side wall thereof is provided with a tooth groove, and the drill tooth 3 is inserted into the tooth groove, that is, a total of eight drill teeth 3 are provided, and the length of the drill tooth 3 is not less than half of the width of the side wall of the quick-release barrel 2, to ensure that it has sufficient wear-resistant service life and good structural strength during normal use. A second bolt 10 is connected between the drill tooth 3 and the quick-release barrel 2, and the drill tooth 3 and the quick-release barrel 2 are locked by the second bolt 10, and the connection is reliable and convenient.

[0043] Example 6

[0044] This embodiment is based on the embodiment 5, and further optimizes and refines the structure of the drill tooth 3, specifically:

[0045] The thickness of the drill tooth 3 exceeds the thickness of the wall of the quick-release barrel 2, and the middle of the drill tooth 3 is inserted into the tooth groove, and the front and rear sides of the drill tooth 3 extend out of the wall of the quick-release barrel 2 respectively, and the drill tooth 3 has sufficient strength and cutting surface.

[0046] Example 7

[0047] This embodiment is based on the embodiment 6, and further optimizes and refines the structure of the quick release tube 2, specifically:

[0048] The outside of each side wall of one end of the quick-release barrel 2 where the prismatic groove 7 is provided is respectively provided with an auxiliary drilling tooth 11, and the auxiliary drilling tooth 11 is inclined 10-30 degrees relative to the barrel wall of the quick-release barrel 2, and the thickness of the auxiliary drilling tooth 11 does not exceed the outer surface of the drilling tooth 3. The auxiliary drilling tooth 11 provides assistance for the drilling of the drill bit, and the connecting hole 9 on the quick-release barrel 2 passes through the corresponding auxiliary drilling tooth 11 and forms a countersunk hole, so that the first bolt 8 does not protrude from the quick-release barrel 2 to avoid affecting the drilling operation.

[0049] Example 8

[0050] This embodiment is based on the embodiment 7, and further optimizes and refines the tooth groove structure, specifically:

[0051] The tooth groove includes a through groove 12 that penetrates the wall of the quick-release barrel 2 and a limiting groove 13 whose groove depth does not exceed half the thickness of the barrel wall, and the two are connected. The drill tooth 3 includes a through portion inserted into the through groove 12 and a limiting portion clamped in the limiting groove 13, and also includes a tooth portion for drilling. The through portion, the limiting portion and the tooth portion are integrally formed, and corresponding limiting holes are respectively provided at the bottom of the limiting portion and the limiting groove 13. The second bolt 10 is threadedly connected in the limiting hole to connect the drill tooth 3 with the quick-release barrel 2 (the threaded structure of the limiting hole is not drawn in the accompanying drawings). The connection between the entire drill tooth 3 and the tooth groove is stable, and the drill tooth 3 is more reliable to use. The limiting hole on the limiting portion is set to a countersunk hole or a countersunk hole structure, so that the second bolt 10 does not need to protrude from the drill tooth 3, thereby reducing interference.

[0052] In this embodiment, the tooth portion of the drill tooth 3 is provided with M-shaped teeth to ensure the long-term and stable cutting and drilling ability of the drill tooth 3.

[0053] It is understandable that different drill bits are sometimes needed depending on the stratum conditions of the construction site. For example, when drilling into a fractured stratum with a higher hardness, a diamond drill bit with a matrix hardness of HRC35-42, a particle size of 80-100 mesh, and a concentration of 120% should be used; when encountering a loose altered stratum, a welded composite drill bit with a matrix hardness of HRC25-38, a particle size of 40-60 mesh, and a concentration of 100% should be used; when drilling in a relatively intact and hard stratum, a diamond drill bit with a matrix hardness of HRC20-35, a particle size of 60-80, and a concentration of 100% should be used. Therefore, the drill bit needs to be replaced constantly during the drilling process, while with the drill bit structure of the present application, only different drill teeth 3 need to be replaced, the replacement time is faster, the labor intensity is lower, and the work efficiency can be improved.

[0054] When using the present application, the drill bit is installed on the drill rod for use. When some drill teeth 3 (generally no more than three) are severely worn or accidentally broken, the corresponding drill teeth 3 can be directly replaced. When (after long-term use) there are a large number of severely worn or broken drill teeth 3 (accounting for more than half of the total number of drill teeth 3), the quick-release barrel 2 is directly removed and then replaced with a new quick-release barrel 2 with drill teeth 3. It is flexible, simple and reliable to use, and can better ensure the efficient progress of drilling operations. In addition, if it is necessary to replace drill teeth 3 with different hardness, the drill teeth 3 can be directly replaced, or the quick-release barrel 2 with drill teeth 3 of another hardness can be directly replaced.

[0055] In addition, in the description of the present utility model, unless otherwise specified, if the terms "multiple", "multiple roots", "multiple groups" are used, they mean two or more than two, and "several", "several roots", "several groups" mean one or more than one. In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", "third" are used, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An engineering geological drilling drill bit, characterized in that: It includes a drill barrel seat, a quick-release barrel and drill teeth. The drill barrel seat is installed on the drill rod of the drilling rig and is threadedly connected to the drill rod. One end of the quick-release barrel is detachably connected to the drill barrel seat, and the other end is provided with a plurality of drill teeth in a circular array. The drill teeth are detachably connected to the quick-release barrel.

2. The drill bit according to claim 1, characterized in that: The drill tube seat comprises a threaded tube, a transition tube and a prismatic tube, which are connected in sequence and formed as one piece. The threaded tube is provided with a threaded structure for threaded connection with a drill rod, and the outside of the prismatic tube is a prismatic structure.

3. The drill bit according to claim 2, characterized in that: A prism groove matching the outer shape of the prism tube end is provided at one end of the quick-release tube, and the prism groove extends from one end of the quick-release tube to the middle of the quick-release tube, and the prism tube is completely immersed in the prism groove and abuts against the bottom of the prism groove, and a first bolt is connected between the prism tube and the groove wall of the prism groove, and the quick-release tube is connected to the drill tube seat by the first bolt.

4. The drill bit according to claim 3, characterized in that: At least one opposite side of the prism tube and at least one opposite side wall of the prism groove are respectively provided with connecting holes, and the connecting holes of the two are arranged one by one, and at least one of the connecting holes of the prism tube and the prism groove wall is a threaded hole, and the prism tube and the quick-release tube are connected by inserting a first bolt in the connecting hole.

5. The drill bit according to claim 4, characterized in that: The quick-release barrel is a prismatic structure, and the quick-release barrel, the exterior of the prismatic barrel and the prismatic groove are all octagonal prismatic structures.

6. The drill bit according to claim 5, characterized in that: The quick release tube is provided with a tooth groove at the opposite end of one end of the prism groove, and each side wall thereof is provided with a tooth groove, the drill tooth is inserted into the tooth groove, a second bolt is connected between the drill tooth and the quick release tube, and the drill tooth and the quick release tube are locked by the second bolt.

7. The drill bit according to claim 6, characterized in that: The thickness of the drill tooth exceeds the thickness of the wall of the quick-release barrel, and the middle part of the drill tooth is inserted into the tooth groove, and the front and rear sides of the drill tooth extend out of the wall of the quick-release barrel respectively.

8. The drill bit according to claim 7, characterized in that: The quick-release barrel is provided with auxiliary drilling teeth on the outside of each side wall of one end of the prismatic groove. The auxiliary drilling teeth are arranged at an inclination of 10-30 degrees relative to the barrel wall of the quick-release barrel. The thickness of the auxiliary drilling teeth does not exceed the outer surface of the drilling teeth. The connecting hole on the quick-release barrel passes through the corresponding auxiliary drilling teeth and forms a countersunk hole.

9. The drill bit according to claim 8, characterized in that: The tooth groove includes a through groove that penetrates the wall of the quick-release barrel and a limiting groove with a groove depth not exceeding half the thickness of the barrel wall. The drill tooth includes a through portion inserted into the through groove and a limiting portion clamped in the limiting groove, and also includes a tooth portion for drilling. The through portion, the limiting portion and the tooth portion are integrally formed, and the limiting portion and the bottom of the limiting groove are respectively provided with corresponding limiting holes, and the limiting hole is threadedly connected to a second bolt to connect the drill tooth to the quick-release barrel, and the limiting hole on the limiting portion is arranged as a countersunk hole or a countersunk hole structure.

10. The drill bit according to claim 9, characterized in that: The tooth portion is provided with M-shaped teeth.

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