Four-wing reaming device under complex conditions of coal mine

Abstract

The invention discloses a four-wing reaming device under complex conditions of a coal mine, and relates to the field of reaming auxiliary devices, in particular to the four-wing reaming device under the complex conditions of the coal mine. Comprising a main body, a carrying handle, an oil cylinder oil return end, an oil return pipeline, an oil cylinder oil inlet end, an oil inlet pipeline, a driving opening and closing shaft, an oil cylinder stand column, an opening and closing circular truncated cone, a driven opening and closing shaft, a tool bit piece, a limiting hole, an oil cylinder barrel, a first-layer oil cylinder, a second-layer oil cylinder and a piston. One side of the main body is provided with a carrying handle, an oil inlet end of the oil cylinder and an oil return end of the oil cylinder, and the main body is connected with a hydraulic system through an oil inlet pipeline and an oil return pipeline. A first-layer oil cylinder, a second-layer oil cylinder and a piston are arranged in the oil cylinder barrel, the piston drives the oil cylinder stand column to move upwards, thrust is transmitted through the opening and closing circular truncated cone, the driven opening and closing shaft is in linkage with the tool bit pieces to open outwards, and the reaming function is achieved. The tool bit piece is provided with a limiting hole to control the opening and closing angle, and operation safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of hole expansion auxiliary devices, in particular to a four-wing hole expansion device under complex conditions in coal mines. Background Art

[0002] With the increasing depth and complexity of coal mining, special working conditions such as gas mines, high-gas mines, coal and gas outburst mines, mines threatened by water damage and rock burst mines are increasing. In order to ensure the safety of underground coal mining, drilling construction is required to prevent and control gas, eliminate water damage, and control rock burst disasters. In the process of underground coal mine construction, hole expansion equipment is an important tool for drilling construction, and its performance directly affects the safety and efficiency of construction.

[0003] In the prior art, when drilling holes in coal mines, it is often necessary to perform destructive operations on the tunnel support, such as cutting the support net to obtain sufficient construction space. This operation not only destroys the original tunnel support structure and reduces the stability of the roof, but also easily causes safety accidents such as roof collapse, gas leakage, water intrusion and rock burst. In addition, frequent destruction of the support net also causes waste of construction materials, increases construction costs, and affects the overall economic benefits of the coal mine. Summary of the invention

[0004] The main purpose of the present invention is to provide a four-wing hole expanding device under complex conditions in coal mines, which can effectively solve the problems in the background technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a four-wing reaming device under complex conditions in coal mines, a carrying handle is installed on one side of the main body, an oil return end of the oil cylinder is installed on one side of the main body, an oil inlet end of the oil cylinder is installed on one side of the main body, an active opening and closing shaft is installed around the main body, an oil cylinder column is installed on the top of the main body, an opening and closing round table is welded to the top of the oil cylinder column, a driven opening and closing shaft is connected around the opening and closing round table, a cutter head piece is installed outside the active opening and closing shaft and the driven opening and closing shaft, a limiting hole is arranged inside the cutter head piece, and an oil cylinder barrel is installed inside the main body;

[0006] An oil return pipe is installed at one end of the oil return end of the oil cylinder, and an oil inlet pipe is installed at one end of the oil inlet end of the oil cylinder;

[0007] A first-layer oil cylinder is installed inside the oil cylinder barrel, a second-layer oil cylinder is installed inside the first-layer oil cylinder, and a piston is installed inside the second-layer oil cylinder.

[0008] Furthermore, the active opening and closing shaft is connected to both sides of the main body through a bearing seat, and the bearing seat is fixed to the main body by bolts.

[0009] Furthermore, the driven opening and closing shaft is connected to the opening and closing cone via a pin shaft, and locking pins are provided at both ends of the pin shaft.

[0010] Furthermore, the cutter head piece is fixed to the outside of the driven opening and closing shaft by welding, and the outer edge of the cutter head piece is an arc-shaped cutting structure.

[0011] Furthermore, a connecting column is provided on the top of the piston, and the connecting column is connected to the bottom of the cylinder column through a thread, and an oil return channel is provided between the piston and the second-layer cylinder.

[0012] Furthermore, a mounting flange is provided at the bottom of the main body, and the mounting flange is connected to the flange interface of the downhole drilling rig through bolts, and the diameter of the screw hole of the mounting flange is 10 mm.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This device uses a four-wing opening and closing structure driven by an oil cylinder, and does not need to destroy the original support net of the tunnel during the hole expansion operation in the coal mine. Compared with the existing technology, this device avoids the safety hazards such as roof collapse, gas leakage, water intrusion and impact ground pressure caused by the support structure being sheared off, greatly improving the safety of underground operations and ensuring the stability and reliability of the construction process.

[0015] This device adopts a hydraulic drive system, and realizes automatic hole expansion operation through the multi-stage extension and contraction of the oil cylinder and the mechanical opening and closing of the cutter head, avoiding the tedious manual cutting of the net and improving the construction efficiency. At the same time, since the support net does not need to be destroyed, it reduces material waste and reduces the cost of subsequent support structure repair or reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a closed schematic diagram of the overall structure of the present invention;

[0018] Figure 3 It is a cross-sectional characteristic diagram of the main structure of the present invention;

[0019] Figure 4 It is a closed cross-sectional characteristic diagram of the main structure of the present invention;

[0020] In the figure: 1. Main body; 2. Carrying handle; 3. Oil return end of the cylinder; 31. Oil return pipe; 4. Oil inlet end of the cylinder; 41. Oil inlet pipe; 5. Active opening and closing shaft; 6. Cylinder column; 7. Opening and closing table; 8. Driven opening and closing shaft; 9. Cutter head; 10. Limiting hole; 11. Cylinder barrel; 111. First-layer cylinder; 112. Second-layer cylinder; 113. Piston. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the contents of this specification. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in an order different from the described order, and various steps can be added, omitted or combined. In addition, the features described relative to some examples can also be combined in other examples.

[0022] As used herein, the term "including" and its variations represent open terms, meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0023] Example

[0024] See also Figure 1 , the present invention provides a technical solution:

[0025] A four-wing reaming device under complex conditions in a coal mine, wherein a carrying handle 2 is installed on one side of the main body 1, an oil cylinder return end 3 is installed on one side of the main body 1, an oil cylinder oil inlet end 4 is installed on one side of the main body 1, an active opening and closing shaft 5 is installed around the main body 1, an oil cylinder column 6 is installed on the top of the main body 1, an opening and closing round table 7 is welded to the top of the oil cylinder column 6, a driven opening and closing shaft 8 is connected around the opening and closing round table 7, a cutter head piece 9 is installed outside the active opening and closing shaft 5 and the driven opening and closing shaft 8, a limiting hole 10 is provided inside the cutter head piece 9, and an oil cylinder barrel 11 is installed inside the main body 1;

[0026] An oil return pipe 31 is installed at one end of the oil return end 3 of the oil cylinder, and an oil inlet pipe 41 is installed at one end of the oil inlet end 4 of the oil cylinder;

[0027] A first-layer oil cylinder 111 is installed inside the oil cylinder barrel 11 , a second-layer oil cylinder 112 is installed inside the first-layer oil cylinder 111 , and a piston 113 is installed inside the second-layer oil cylinder 112 .

[0028] exist Figure 1 and Figure 2In the figure, the main body 1 is the base of the device, which is used to carry various components. A carrying handle 2 is installed on one side, and the carrying handle is fixed to the main body by bolts, which is convenient for the operator to manually carry and adjust the position of the device. The oil return end 3 and the oil inlet end 4 of the cylinder are respectively located on both sides of the main body 1. The oil return end is connected to the oil return pipeline 31, and the oil inlet end is connected to the oil inlet pipeline 41, forming the oil inlet and outlet passages of the hydraulic system to provide hydraulic power for the device. The cylinder column 6 is installed on the top of the main body 1, and the top is connected to the opening and closing truncated table 7 by welding. The opening and closing truncated table is used to support and transmit the thrust of the cylinder column. The active opening and closing shaft 5 is located around the main body 1, and is connected to both sides of the main body through the bearing seat. The bearing seat is fixed to the main body by bolts to realize the stable rotation of the active opening and closing shaft. The driven opening and closing shaft 8 is connected to the opening and closing truncated table 7 through a pin shaft, and locking pins are provided at both ends of the pin shaft to prevent the pin shaft from loosening during operation. The cutter head piece 9 is welded and fixed to the outside of the driven opening and closing shaft 8. The outer edge of the cutter head piece has an arc-shaped cutting structure to form a stable hole expansion function. A limit hole 10 is provided on the inner side of the cutter head piece to limit the maximum opening and closing range of the cutter head piece to ensure safe operation.

[0029] exist Figure 3 and Figure 4 In the process, hydraulic oil is input into the cylinder barrel 11 through the oil inlet pipe 41, pushing the piston 113 of the first layer cylinder 111 and the second layer cylinder 112 to move upward. A connecting column is provided on the top of the piston, and the connecting column is connected to the bottom of the cylinder column 6 by a thread, so as to transmit the hydraulic thrust to the cylinder column 6. The upward movement of the piston drives the cylinder column 6 to move upward, and then transmits the thrust to the driven opening and closing shaft 8 through the opening and closing cone 7 welded on the top of the cylinder column. The driven opening and closing shaft 8 is linked with the cutter head piece 9 to realize the outward opening and closing of the cutter head piece, and the hole expansion operation is completed. The hydraulic system switches to the oil return state, and the hydraulic oil in the cylinder barrel 11 flows back through the oil return pipe 31. The piston 113 resets downward, driving the cylinder column 6 to move downward, and the driven opening and closing shaft 8 closes the cutter head piece 9, and the device returns to its initial state.

[0030] It should be noted that the blade piece 9 described in the above embodiment can be installed on the driven opening and closing shaft 8 through a detachable structure, which is convenient for replacing blades of different shapes and sizes to meet different hole expansion requirements. At the same time, the diameters of different limiting holes 10 can be adjusted according to the working environment to limit the angle range of the blade piece opening and closing, thereby improving the accuracy and safety of the operation.

[0031] Those skilled in the art should understand that the various embodiments disclosed above can be changed and modified in various ways without departing from the essence of the invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

[0032] It should be noted that not all steps and units in the above processes are necessary, and some steps or units can be ignored according to actual needs. The execution order of each step is not fixed and can be determined as needed. The device structure described in the above embodiments can be a physical structure or a logical structure, that is, some units may be implemented by the same physical entity, or some units may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0033] The specific embodiments set forth above describe exemplary embodiments, but do not represent all embodiments that may be implemented or fall within the scope of protection of the claims. The term "exemplary" used throughout this specification means "used as an example, instance, or illustration" and does not mean "preferred" or "having advantages" over other embodiments. For the purpose of providing an understanding of the described techniques, the specific embodiments include specific details. However, these techniques may be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0034] The above description of the present disclosure is provided to enable any person of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A four-wing hole expanding device for use under complex conditions in coal mines, comprising a main body (1), an opening and closing truncated table (7), and a cylinder barrel (11), wherein: A carrying handle (2) is installed on one side of the main body (1), an oil return end (3) of the oil cylinder is installed on one side of the main body (1), an oil inlet end (4) of the oil cylinder is installed on one side of the main body (1), an active opening and closing shaft (5) is installed around the main body (1), a cylinder column (6) is installed on the top of the main body (1), an opening and closing truncated table (7) is welded to the top of the cylinder column (6), a driven opening and closing shaft (8) is connected around the opening and closing truncated table (7), a cutter head piece (9) is installed outside the active opening and closing shaft (5) and the driven opening and closing shaft (8), a limiting hole (10) is provided inside the cutter head piece (9), and a cylinder barrel (11) is installed inside the main body (1); An oil return pipe (31) is installed at one end of the oil return end (3) of the oil cylinder, and an oil inlet pipe (41) is installed at one end of the oil inlet end (4) of the oil cylinder; A first-layer oil cylinder (111) is installed inside the oil cylinder barrel (11), a second-layer oil cylinder (112) is installed inside the first-layer oil cylinder (111), and a piston (113) is installed inside the second-layer oil cylinder (112).

2. The four-wing hole expanding device for coal mines under complex conditions according to claim 1 is characterized by: The active opening and closing shaft (5) is connected to both sides of the main body (1) via a bearing seat, and the bearing seat is fixed to the main body (1) via bolts.

3. The four-wing hole expanding device for coal mines under complex conditions according to claim 1 is characterized by: The driven opening and closing shaft (8) and the opening and closing truncated table (7) are connected via a pin shaft, and locking pins are provided at both ends of the pin shaft.

4. The four-wing hole expanding device for coal mines under complex conditions according to claim 1 is characterized by: The cutter head piece (9) is fixed to the outside of the driven opening and closing shaft (8) by welding, and the outer edge of the cutter head piece (9) is an arc-shaped cutting structure.

5. The four-wing hole expanding device for coal mines under complex conditions according to claim 1 is characterized by: A connecting column is provided on the top of the piston (113), and the connecting column is connected to the bottom of the oil cylinder column (6) through threads. An oil return channel is provided between the piston (113) and the second-layer oil cylinder (112).

6. The four-wing hole expanding device for coal mines under complex conditions according to claim 1 is characterized by: A mounting flange is provided at the bottom of the main body (1), and the mounting flange is connected to the flange interface of the downhole drilling rig via bolts, and the diameter of the screw hole of the mounting flange is 10 mm.

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