Through type reverse circulation impactor
By introducing an anti-fall structure and limit flange into the through-type reverse circulation impactor, the threaded connection of the connection part is used to solve the problem of drill bit falling off, and the stability and reliability of the drill bit are improved.
Patent Information
- Application Number
- CN202420644518.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The drill bit of the existing through-type reverse cycle impactor is prone to fall off from the outer casing and front joints during the working process, resulting in the failure of the equipment.
A through-type reverse circulating impactor including an anti-fall structure, a limit flange and a connecting part is designed, by providing an anti-fall structure and a limit flange on the drill bit, and using a threaded connection of the first and second connecting parts. , make sure the drill bit does not fall off during work.
Effectively prevent the drill bit from falling off from the outer casing and front joints, improve the stability and reliability of the equipment, and ensure the continuous and effective operation of the drill bit during impact operation.
Smart Images
Figure CN222162514U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of drilling machinery, and more specifically relates to a through-type reverse circulation impactor. Background Art
[0002] The through-type reverse circulation impactor is also called a hollow impactor. It has a through circular hole in the center, which can obtain complete cores or large rock samples. It is mainly used for mineral exploration and rescue construction. It is also widely used in large-scale infrastructure projects, hydropower, roads, railways, urban construction, mining and other fields. It has high efficiency, stability and reliability. At present, the drill bit of the through-type reverse circulation impactor is installed at the end of the outer casing, and the installation is completed with the help of the front joint and the retaining ring; however, the drill bit of this structure still has the risk of failure in connection with the retaining ring during operation, causing the drill bit to fall off the front joint and the outer casing. Utility Model Content
[0003] The utility model aims to provide a through-type reverse circulation impactor to solve the technical problem in the prior art that the drill bit has the risk of falling off from the front joint and the outer sleeve.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a through-type reverse circulation impactor, including an outer sleeve and a rear joint installed in the outer sleeve, a one-way valve, a spring, a cylinder, a piston, a sampling tube, a retaining ring, a front joint and a drill bit; also including an anti-drop structure installed at the lower end of the outer sleeve, the anti-drop structure is provided with a penetrating accommodating cavity, a limiting flange installed on the inner wall of the accommodating cavity and a first connecting part, the limiting flange is located at one end of the accommodating cavity close to the outer sleeve, and the first connecting part is located at one end of the accommodating cavity away from the outer sleeve; the front joint and the drill bit are penetrated in the accommodating cavity, the front joint is provided with an extrusion end located in the accommodating cavity and connected to the limiting flange, and the outer surface of the drill bit is provided with a second connecting part corresponding to the first connecting part, the second connecting part is located between the limiting flange and the first connecting part, and the second connecting part is used to limit the position of the drill bit.
[0005] In one possible implementation, the anti-fall structure is a sleeve, the limiting flange is formed by extending inward from the inner wall of the sleeve, the end face of the limiting flange is flush with the end face of the anti-fall structure, and the limiting flange and the end face of the sleeve are connected to the lower end face of the outer sleeve.
[0006] In a possible implementation, the limiting flange and the extrusion end are both annular structures.
[0007] In a possible implementation, the sleeve is a conical structure that is larger at the top and smaller at the bottom.
[0008] In a possible implementation, a mating mounting surface and a mounting groove located between the limiting flange and the first connecting portion are provided on the inner wall of the accommodating cavity, and the mating mounting surface and the mounting groove are arranged in sequence from the limiting flange and the first connecting portion; the extrusion end is adapted to the mating mounting surface, and the second connecting portion is located in the mounting groove.
[0009] In a possible implementation, a plurality of mounting holes are provided on the inner wall of the accommodating cavity, and the plurality of mounting holes are arranged at intervals along the axial direction of the accommodating cavity; a connecting hole corresponding to the mounting hole is provided on the first connecting portion; and the first connecting portion is detachably connected to the anti-fall structure.
[0010] In a possible implementation manner, the limiting flange, the first connecting portion and the anti-fall structure are integrally formed.
[0011] In a possible implementation, a plurality of disassembly holes are provided on the rear joint.
[0012] The beneficial effect of the through-type reverse circulation impactor provided by the utility model is that: compared with the prior art, the through-type reverse circulation impactor of the utility model first installs the front joint and the anti-drop structure on the drill bit in sequence from the smaller end of the drill bit, and screws the anti-drop structure to make the first connection part and the second connection part threadedly connected, and continues to screw the anti-drop structure to make the first connection part and the second connection part alternately arranged, and the second connection part is located between the limiting flange and the first connection part. Since the drill bit makes axial movement when working, the first connection part and the second connection part are no longer threadedly connected. With the help of the interaction between the first connection part and the second connection part, when the drill bit reciprocates and performs an impact operation, it can effectively prevent the drill bit from falling off the outer sleeve and the front joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 A schematic diagram of the structure of a through-type reverse circulation impactor provided in an embodiment of the utility model;
[0015] Figure 2 A schematic structural diagram of an anti-fall structure provided in an embodiment of the utility model.
[0016] Among them, the reference numerals in the figure are:
[0017] 10. Outer sleeve; 11. Rear joint; 12. One-way valve; 13. Spring; 14. Cylinder; 15. Piston; 16. Sampling tube; 17. Retaining ring; 18. Front joint; 19. Drill bit; 20. Anti-fall structure; 21. Accommodating cavity; 22. Limiting flange; 23. First connecting part; 24. Extrusion end; 25. Second connecting part; 26. Matching mounting surface; 27. Mounting groove; 28. Disassembly hole. DETAILED DESCRIPTION
[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0022] See also Figure 1 and Figure 2The through-type reverse circulation impactor provided by the utility model is now described. A through-type reverse circulation impactor comprises an outer sleeve 10 and a rear joint 11, a one-way valve 12, a spring 13, a cylinder 14, a piston 15, a sampling tube 16, a retaining ring 17, a front joint 18 and a drill bit 19 installed in the outer sleeve 10; it also comprises an anti-drop structure 20 installed at the lower end of the outer sleeve 10, the anti-drop structure 20 is provided with a through accommodating cavity 21, a limiting flange 22 installed on the inner wall of the accommodating cavity 21 and a first connecting portion 23, the limiting flange 22 is located at the accommodating cavity 21 near the outer sleeve 10, and the first connecting portion 23 is provided on the anti-drop structure 20. At one end of the sleeve 10, the first connecting portion 23 is located at the end of the accommodating cavity 21 away from the outer sleeve 10; the front joint 18 and the drill bit 19 are inserted into the accommodating cavity 21, and the front joint 18 is provided with an extrusion end 24 located in the accommodating cavity 21 and connected to the limiting flange 22. The outer surface of the drill bit 19 is provided with a second connecting portion 25 corresponding to the first connecting portion 23, and the second connecting portion 25 is located between the limiting flange 22 and the first connecting portion 23. The second connecting portion 25 is used to limit the position of the drill bit 19.
[0023] Compared with the prior art, the through-type reverse circulation impactor provided by the utility model is firstly provided with the front joint 18 and the anti-drop structure 20 in sequence on the drill bit 19 from the smaller end thereof, and the anti-drop structure 20 is screwed to make the first connection part 23 and the second connection part 25 threadedly connected, and the anti-drop structure 20 is continuously screwed to make the first connection part 23 and the second connection part 25 alternately arranged, and the second connection part 25 is located between the limiting flange 22 and the first connection part 23. Since the drill bit 19 makes axial movement during operation, the first connection part 23 and the second connection part 25 are no longer threadedly connected. With the help of the interaction between the first connection part 23 and the second connection part 25, when the drill bit 19 reciprocates to perform an impact operation, the drill bit 19 can be effectively prevented from falling off from the outer sleeve 10 and the front joint 18.
[0024] See also Figure 1 and Figure 2 As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, the anti-drop structure 20 is a sleeve, and the limiting flange 22 is formed by extending inward from the inner wall of the sleeve. The end face of the limiting flange 22 is flush with the end face of the anti-drop structure 20, and the limiting flange 22 and the end face of the sleeve are connected to the lower end face of the outer sleeve 10; that is, the anti-drop structure 20 is a sleeve structure, and the interior is a through accommodating cavity 21, and the limiting flange 22 and the first connecting portion 23 are located on the inner wall of the sleeve. The end face of the limiting flange 22 is coplanar with the end face of the sleeve, so that the size and weight of the entire anti-drop structure 20 are small. During installation, the end face of the limiting flange 22 and the end face of the sleeve are both butted against the end face of the outer sleeve 10.
[0025] See also Figure 1 and Figure 2As a specific implementation of the through-type reverse circulation impactor provided by the utility model, the limiting flange 22 and the extrusion end 24 are both annular structures, which increases the contact area between the extrusion end 24 and the limiting flange 22, thereby making the installation of the entire anti-fall structure 20 more firm and reliable.
[0026] See also Figure 1 and Figure 2 As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, the sleeve is a conical structure with a larger upper part and a smaller lower part, so that the sleeve is installed between the rod and the head of the drill bit 19 and forms a relatively smooth transition.
[0027] See also Figure 1 and Figure 2 As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, a matching installation surface 26 and a mounting groove 27 located between the limiting flange 22 and the first connecting portion 23 are provided on the inner wall of the accommodating chamber 21, and the matching installation surface 26 and the mounting groove 27 are arranged in sequence from the limiting flange 22 and the first connecting portion 23; the extrusion end 24 is adapted to the matching installation surface 26, and the second connecting portion 25 is located in the mounting groove 27; before installing the front joint 18, the anti-drop structure 20, the front joint 18 and the drill bit 19 are assembled and installed, wherein the extrusion end 24 is installed on the matching installation surface 26, and the limiting flange 22 is located between the outer sleeve 10 and the extrusion end 24, so as to realize the fixed installation of the anti-drop structure 20. The second connecting portion 25 is matched and installed in the mounting groove 27, so that the second connecting portion 25 corresponds to the first connecting portion 23, thereby achieving the purpose of limiting the drill bit 19. The overall structure of the anti-drop structure 20 in this way is compact and has high functionality.
[0028] See also Figure 1 and Figure 2 As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, a plurality of mounting holes are provided on the inner wall of the accommodating chamber 21, and the plurality of mounting holes are arranged at intervals along the axial direction of the accommodating chamber 21; a connecting hole corresponding to the mounting hole is provided on the first connecting portion 23; the first connecting portion 23 is detachably connected to the anti-drop structure 20; the plurality of mounting holes are linearly arranged on the inner wall of the accommodating chamber 21, so the first connecting portion 23 can be installed at different positions, thereby changing the distance between the first connecting portion 23 and the second connecting portion 25, thereby achieving the purpose of adjusting the moving distance range of the drill bit 19. Specifically, the connecting hole on the first connecting portion 23 is coaxially aligned with the mounting hole at the corresponding mounting position, and then the first connecting portion 23 is installed on the anti-drop structure 20 using a fastener, and the first connecting portion 23 is detachably connected to the anti-drop structure. The mounting hole is a screw hole, and the fastener is a bolt.
[0029] See also Figure 1 and Figure 2As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, the limiting flange 22, the first connecting part 23 and the anti-drop structure 20 are integrally formed; the connection strength and reliability between the limiting flange 22, the first connecting part 23 and the anti-drop structure 20 are improved, so that the limiting flange 22 and the first connecting part 23 can work stably and reliably, and then the anti-drop structure 20 can be used safely and efficiently to ensure that the drill bit 19 will not fall.
[0030] See also Figure 1 As a specific embodiment of the through-type reverse circulation impactor provided by the utility model, a plurality of disassembly holes 28 are provided on the rear joint 11; the disassembly holes 28 enable the rear joint 11 to be conveniently and labor-savingly disassembled and installed. A plurality of disassembly holes 28 are provided, and all are opened on the outer side of the rear joint 11, and the plurality of disassembly holes 28 are arranged along the circumference of the rear joint 11.
[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A through-type reverse circulation impactor, comprising an outer sleeve and a rear joint installed in the outer sleeve, a one-way valve, a spring, a cylinder, a piston, a sampling tube, a retaining ring, a front joint and a drill bit; characterized in that: It also includes an anti-fall structure installed at the lower end of the outer sleeve, the anti-fall structure is provided with a penetrating accommodating cavity, a limiting flange installed on the inner wall of the accommodating cavity and a first connecting part, the limiting flange is located at one end of the accommodating cavity close to the outer sleeve, and the first connecting part is located at one end of the accommodating cavity away from the outer sleeve; the front joint and the drill bit are passed through the accommodating cavity, the front joint is provided with an extrusion end located in the accommodating cavity and connected to the limiting flange, the outer side surface of the drill bit is provided with a second connecting part corresponding to the first connecting part, the second connecting part is located between the limiting flange and the first connecting part, and the second connecting part is used to limit the position of the drill bit; the first connecting part and the second connecting part are both provided with threaded sections for threaded connection.
2. The through-type reverse circulation impactor according to claim 1, characterized in that: The anti-drop structure is a sleeve, the limiting flange is formed by extending inward from the inner wall of the sleeve, the end face of the limiting flange is flush with the end face of the anti-drop structure, and the limiting flange and the sleeve end face are connected to the lower end face of the outer sleeve.
3. The through-type reverse circulation impactor according to claim 2, characterized in that: The limiting flange and the extrusion end are both annular structures.
4. The through-type reverse circulation impactor according to claim 2, characterized in that: The sleeve is a tapered structure that is larger at the top and smaller at the bottom.
5. The through-type reverse circulation impactor according to claim 1, characterized in that: The inner wall of the accommodating cavity is provided with a matching mounting surface and a mounting groove located between the limiting flange and the first connecting portion, and the matching mounting surface and the mounting groove are arranged in sequence from the limiting flange and the first connecting portion; the extrusion end is adapted to the matching mounting surface, and the second connecting portion is located in the mounting groove.
6. The through-type reverse circulation impactor according to claim 1, characterized in that: A plurality of mounting holes are provided on the inner wall of the accommodating cavity, and the plurality of mounting holes are arranged at intervals along the axial direction of the accommodating cavity; a connecting hole corresponding to the mounting hole is provided on the first connecting portion; and the first connecting portion is detachably connected to the anti-fall structure.
7. The through-type reverse circulation impactor according to claim 1, characterized in that: The limiting flange, the first connecting portion and the anti-fall structure are integrally formed.
8. The through-type reverse circulation impactor according to claim 1, characterized in that: The rear joint is provided with a plurality of disassembly holes.