Opening and closing cutter for water pressure hole forming

Abstract

The opening and closing cutter comprises a cutter head and a cutter handle, the cutter head is fixedly installed on the outer surface of one end of the cutter handle, a through hole is formed in the end, close to the cutter head, of an inner cavity of the cutter handle, internal threads are formed in the inner wall of the cutter handle, and anti-loosening structures are fixedly installed on the two sides of the end, close to the cutter head, of the inner cavity of the cutter handle. The anti-loosening structure comprises a fixed column, a cylindrical groove, a movable column, an extension plate, a limiting groove, a mounting hole, a steel ball and a compression spring, and the outer surface of one end of the fixed column is fixedly connected with the end, close to the tool bit, of the inner cavity of the tool handle. According to the opening and closing cutter for hydraulic cavity forming, due to the arrangement of the anti-loosening structure and the arrangement of the compression spring, after threaded connection, loosening after threaded connection can be eliminated through the compression spring, stability is improved, and due to the arrangement of the mounting hole and the steel ball, when the cutter handle is connected with an external arm rod, the cutter handle is not prone to loosening. And the resistance during installation during rotation can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a water pressure hole-making opening and closing cutter. Background Art

[0002] The hydraulic cavitation opening and closing cutter is a tool that uses high-pressure water flow to form mining channels in coal seams.

[0003] Before mining, the hole-making water jet needs to be positioned at the location where mining is required. Then, high-pressure water is sprayed into the coal seam to form a water jet nozzle. The energy of the high-pressure water dissolves the coal seam, and at the same time, coal debris will be impacted around the hole, thus forming a mining hole.

[0004] In the prior art, the hydraulic cavitation opening and closing cutter is assembled by thread connection, which is easy to loosen and the connection is not stable enough.

[0005] For this reason, we propose a water pressure cavitation opening and closing cutter. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a water pressure cavitation opening and closing cutter, which can eliminate the looseness after the threaded connection, improve the stability of the connection, etc., and can effectively solve the problems in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a water pressure cavitation opening and closing cutting knife, including a knife head and a knife handle, the knife head is fixedly installed on the outer surface of one end of the knife handle, a through hole is provided at the end of the knife handle inner cavity close to the knife head, an inner wall of the knife handle is provided with an internal thread, and anti-loosening structures are fixedly installed on both sides of the knife handle inner cavity close to one end of the knife head, the anti-loosening structure includes a fixed column, a cylindrical groove, a movable column, an extension plate, a limit groove, an installation hole, a steel ball and a compression spring, and the outer surface of one end of the fixed column is fixedly connected to the end of the knife handle inner cavity close to the knife head.

[0010] Preferably, the cylindrical groove is formed on the outer surface of one end of the fixing column, the limiting groove is formed on one side of the outer surface of one end of the fixing column, and the limiting groove is communicated with the cylindrical groove.

[0011] Preferably, the compression spring is located in the cylindrical groove, an outer surface of one end of the compression spring is fixedly connected to one end of the cylindrical groove, and an outer surface of the other end of the compression spring is fixedly connected to an outer surface of one end of the movable column.

[0012] Preferably, one end of the outer surface of one side of the extension plate is fixedly connected to the outer surface of the other end of the movable column, the mounting hole is opened on the outer surface of one side of the extension plate away from the movable column, and the steel ball is rotatably installed in the mounting hole.

[0013] Preferably, the outer wall of the movable column and the cylindrical groove are slidably connected.

[0014] Preferably, the outer surface of one end of the movable column is elastically connected to one end of the cylindrical groove through a compression spring, and the end of the extension plate away from the movable column is snap-fitted to the limiting groove.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a water pressure cavitation opening and closing cutter, which has the following beneficial effects:

[0017] 1. The hydraulic cavitation opening and closing cutter is provided with an anti-loosening structure. Through the provided compression spring, after the threaded connection, the compression spring can eliminate the loosening after the threaded connection and improve the stability.

[0018] 2. The hydraulic cavitation opening and closing cutting knife can reduce the resistance of installation during rotation when connecting the knife handle and the external arm rod through the provided mounting holes and steel balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the overall structure of a water pressure hole-making opening and closing cutting knife.

[0020] Figure 2 The utility model is a schematic diagram of the structure of a knife handle in a water pressure hole-making opening and closing cutting knife.

[0021] Figure 3 The utility model is a schematic diagram of the structure of the anti-loosening structure of the water pressure hole making opening and closing cutting knife.

[0022] Figure 4 It is a side cross-sectional view of an anti-loosening structure in a water pressure cavitation opening and closing cutter of the utility model.

[0023] In the figure: 1. Cutter head; 2. Cutter handle; 3. Through hole; 4. Internal thread; 5. Anti-loosening structure; 6. Fixed column; 7. Cylindrical groove; 8. Movable column; 9. Extension plate; 10. Limiting groove; 11. Mounting hole; 12. Steel ball; 13. Compression spring. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] This embodiment is a water pressure cavitation opening and closing cutting knife.

[0026] like Figure 1-4 As shown, it includes a cutter head 1 and a handle 2, the cutter head 1 is fixedly installed on the outer surface of one end of the handle 2, a through hole 3 is opened at the end of the inner cavity of the handle 2 close to the cutter head 1, an inner wall of the handle 2 is opened with an internal thread 4, and anti-loosening structures 5 are fixedly installed on both sides of the inner cavity of the handle 2 close to the end of the cutter head 1, the anti-loosening structure 5 includes a fixed column 6, a cylindrical groove 7, a movable column 8, an extension plate 9, a limit groove 10, a mounting hole 11, a steel ball 12 and a compression spring 13, and the outer surface of one end of the fixed column 6 is fixedly connected to the end of the inner cavity of the handle 2 close to the cutter head 1.

[0027] The cylindrical groove 7 is opened on the outer surface of one end of the fixed column 6, and the limiting groove 10 is opened on one side of the outer surface of one end of the fixed column 6, and the limiting groove 10 is connected with the cylindrical groove 7; the compression spring 13 is located in the cylindrical groove 7, and the outer surface of one end of the compression spring 13 is fixedly connected to one end of the cylindrical groove 7, and the outer surface of the other end of the compression spring 13 is fixedly connected to the outer surface of one end of the movable column 8; one end of the outer surface of one side of the extension plate 9 is fixedly connected to the outer surface of the other end of the movable column 8, and the mounting hole 11 is opened on the outer surface of the side of the extension plate 9 away from the movable column 8, and the steel ball 12 is rotatably installed in the mounting hole 11; the outer wall of the movable column 8 and the cylindrical groove 7 are slidably connected; the outer surface of one end of the movable column 8 is elastically connected to one end of the cylindrical groove 7 through the compression spring 13, and the end of the extension plate 9 away from the movable column 8 and the limiting groove 10 are snap-fitted.

[0028] It should be noted that the utility model is a water pressure hole making opening and closing cutting knife. The cutter head 1, the handle 2, the through hole 3 and the internal thread 4 recorded in the text belong to the prior art, which can be effectively known to the technicians in the relevant technical field, and the details are not repeated here. When the handle 2 is threadedly connected with the external arm rod, the arm rod will squeeze the extension plate 9 inside the handle 2. One end of the extension plate 9 is close to the internal thread 4 to prevent the arm rod from being unable to apply pressure to the extension plate 9 due to the hollow structure inside the arm rod. When the arm rod is connected to the handle 2, the extension plate 9 is squeezed to drive the movable column 8 to slide along the cylindrical groove 7. The movable column 8 squeezes the compression spring 13 inside the cylindrical groove 7. When the handle 2 is threadedly connected with the external arm rod, one side of the extension plate 9 is squeezed into the limit groove 10 for limit. At this time, the compression spring 13 is in a compressed state, which can eliminate the looseness of the handle 2 after the threaded connection and improve stability. By setting the mounting hole 11 and the steel ball 12, when the handle 2 is connected with the external arm rod, the resistance during installation during rotation can be reduced.

[0029] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A hydraulic cavitation opening and closing cutting knife, comprising a knife head (1) and a knife handle (2), wherein the knife head (1) is fixedly mounted on the outer surface of one end of the knife handle (2), a through hole (3) is provided at one end of the inner cavity of the knife handle (2) close to the knife head (1), and an inner wall of the knife handle (2) is provided with an internal thread (4), characterized in that: Anti-loosening structures (5) are fixedly installed on both sides of the inner cavity of the knife handle (2) close to one end of the knife head (1), and the anti-loosening structure (5) comprises a fixed column (6), a cylindrical groove (7), a movable column (8), an extension plate (9), a limit groove (10), a mounting hole (11), a steel ball (12) and a compression spring (13), and the outer surface of one end of the fixed column (6) is fixedly connected to one end of the inner cavity of the knife handle (2) close to the knife head (1).

2. A hydraulic cavitation opening and closing cutter according to claim 1, characterized in that: The cylindrical groove (7) is formed on the outer surface of one end of the fixing column (6), the limiting groove (10) is formed on one side of the outer surface of one end of the fixing column (6), and the limiting groove (10) is connected to the cylindrical groove (7).

3. A hydraulic cavitation opening and closing cutter according to claim 2, characterized in that: The compression spring (13) is located in the cylindrical groove (7), the outer surface of one end of the compression spring (13) is fixedly connected to one end of the cylindrical groove (7), and the outer surface of the other end of the compression spring (13) is fixedly connected to the outer surface of one end of the movable column (8).

4. A hydraulic cavitation opening and closing cutter according to claim 3, characterized in that: One end of the outer surface of one side of the extension plate (9) is fixedly connected to the outer surface of the other end of the movable column (8), the mounting hole (11) is opened on the outer surface of the side of the extension plate (9) away from the movable column (8), and the steel ball (12) is rotatably mounted in the mounting hole (11).

5. A hydraulic cavitation opening and closing cutter according to claim 4, characterized in that: The outer wall of the movable column (8) is slidably connected to the cylindrical groove (7).

6. A hydraulic cavitation opening and closing cutter according to claim 5, characterized in that: The outer surface of one end of the movable column (8) is elastically connected to one end of the cylindrical groove (7) via a compression spring (13), and the end of the extension plate (9) away from the movable column (8) is snap-connected to the limiting groove (10).

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