Double-oil-cylinder traction device of underground drill rig

Abstract

The utility model provides a double-oil-cylinder traction device of an underground drill rig. A hydraulic loop system is composed of two oil cylinders, an oil inlet pipe, an oil return pipe, a feeding oil pipe and a main oil return pipe, a control system is composed of two reversing valves and an oil return reversing valve, and a traction fixing system is composed of two pressing columns and a chain. The pressing column is fixedly arranged at a traction fixing point, the two ends of the chain are connected with the pressing column and the front ends of the oil cylinders respectively, and the two oil cylinders are fixedly connected with the drilling machine front support and the drilling machine rear support respectively. An oil inlet of the oil cylinder is connected with a feeding oil pipe of the drilling machine through a reversing valve and an oil inlet pipe; an oil outlet of the oil cylinder is connected to an oil return reversing valve through a three-way valve, and the other end of the oil return reversing valve is connected to a main oil return pipe of the drilling machine. The double-traction-point balanced traction drilling machine is adopted, and stable and efficient transportation of the drilling machine can be kept; and when the slope of a construction roadway is larger than 18 degrees, the drilling machine can still be safely transported.

Description

Technical Field

[0001] The utility model relates to the field of tunnel drilling rig transportation, in particular to a double-cylinder traction device for a tunnel drilling rig. Background Art

[0002] In coal mine gas control, gas extraction is widely used as a common method. Pre-extraction of coal seam gas requires extraction drilling construction before the construction of the mining face. During the extraction drilling construction process, hydraulic drilling rigs are used for drilling construction. During the construction, it is necessary to consider the problem of frequent replacement of drilling rigs in the drilling site and frequent relocation and transportation. Since electromechanical transportation equipment such as belt conveyors and scraper conveyors occupy the tunnel space, the space for transporting drilling rigs is even smaller. In the extraction tunnel, it is particularly important to be able to safely transport the drilling rigs over long distances.

[0003] During the transportation of hydraulic tunnel drilling rigs in the construction tunnel, it is necessary to ensure that the traction distance of the drilling rig is moderate, and the drilling rig can be balanced and towed at two towing points to ensure smooth and efficient transportation of the drilling rig; when the slope of the construction tunnel is greater than 18 degrees, the drilling rig can still be safely transported. The existing drilling rig transportation is manually dragged and transported through a fall chain traction device, and the fall chain is hung on the tunnel roof to tow the drilling rig to move and complete the drilling rig transportation task.

[0004] However, the chain traction device has the following defects:

[0005] 1. The transport distance of chain traction is short, and the suspension point needs to be changed frequently, which leads to low work efficiency and increases the construction difficulty and labor intensity of on-site personnel. At the same time, the risk factor of on-site traction is also increasing;

[0006] 2. During the chain traction process, one traction point is likely to cause traction imbalance, and the drilling rig will deviate during the traction process, which is likely to damage the electromechanical transportation equipment in the tunnel;

[0007] 3. Crawler drilling rigs are generally large in size and heavy in weight. Due to the effect of gravity, it is difficult for them to operate normally and safely in tunnels with a slope greater than 18 degrees. In addition, the crawler configuration cost is high and the maintenance cost is high. Utility Model Content

[0008] Based on the above technical problems, the utility model proposes a double-cylinder traction device for a tunnel drilling rig, which can improve the transportation efficiency of the tunnel hydraulic drilling rig, reduce damage to other equipment during transportation, and at the same time reduce the labor intensity of employees and improve the construction safety factor.

[0009] A double-cylinder traction device for a tunnel drilling rig comprises: a hydraulic circuit system, a traction fixing system, and a control system. The hydraulic circuit system consists of two cylinders, a cylinder oil inlet pipe, a cylinder oil return pipe, an oil feed pipe, and a total oil return pipe. The control system consists of two reversing valves and an oil return reversing valve. The traction fixing system consists of two pressure columns and a chain. The pressure column is fixedly arranged at a traction fixing point, and the two ends of the chain are respectively connected to the pressure column and the front end of the cylinder. The two cylinders are respectively connected and fixed to the front support and the rear support of the drilling rig. The oil inlet of the cylinder is connected to the oil feed pipe of the drilling rig through the reversing valve and the oil inlet pipe. The oil outlet of the cylinder is connected to one of the oil return reversing valves through a three-way valve, and the other end of the oil return reversing valve is connected to the total oil return pipe of the drilling rig.

[0010] In a possible implementation, the oil feed pipe is connected to the two reversing valves through the three-way valve.

[0011] In a possible implementation, the oil feed pipe includes a drilling rig feed hydraulic system oil inlet pipeline and a drilling rig rotation hydraulic system oil inlet pipeline, and the drilling rig feed hydraulic system oil inlet pipeline and the drilling rig rotation hydraulic system oil inlet pipeline are respectively connected to one of the reversing valves.

[0012] Beneficial effects:

[0013] 1. This device uses the inherent system of the hydraulic drilling rig and forms a "two-in and two-out" passage by adding hydraulic oil pipes. After the hydraulic circuit of the traction device is formed, it can form a parallel relationship with the hydraulic circuit of the drilling rig. During the conversion process of the two sets of hydraulic circuits, the disadvantage of hydraulic oil loss caused by disassembling the oil pipes is avoided, and the drilling rig can be transported forward across the equipment in a balanced manner;

[0014] 2. This device uses a pressure column to fix the traction fixing point, which can reduce the inefficiency caused by frequent replacement of traction points; the length of the traction chain can be increased or decreased as needed, which can increase the single traction length and improve the transportation efficiency of the drilling rig;

[0015] 3. The device is easy to operate. The two operating handles can control the extension and retraction of the two oil cylinders at the same time, realizing the normal operation of the hydraulic circuit system and the balanced transportation of the drilling rig, ensuring that the drilling rig can be mechanized during the traction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the utility model is shown Figure 1 ;

[0017] Figure 2 The structure of the utility model is shown Figure 2 . DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] Embodiment 1

[0020] like Figure 1~Figure 2 A double-cylinder traction device for a tunnel drilling rig shown in the figure includes: a hydraulic circuit system 2, a traction and fixing system 1, and a control system 3. The hydraulic circuit system 2 is composed of two cylinders 4, an oil inlet pipe 5, an oil return pipe 6, an oil feed pipe 9, and a total oil return pipe 10. The control system 3 is composed of two reversing valves 7 and an oil return reversing valve 8. The traction and fixing system 1 is composed of two pressure columns 11 and a chain 12; the pressure column 11 is fixedly arranged at a traction fixing point, and the two ends of the chain 12 are respectively connected to the pressure column 11 and the front end of the cylinder 4, and the two cylinders 4 are respectively connected and fixed to the front support 13 and the rear support 14 of the drilling rig.

[0021] The oil inlet of the oil cylinder 4 is connected to an oil inlet pipe 5, and the other end of the oil inlet pipe 5 is connected to one of the reversing valves 7. The other oil cylinder 4 is connected to the other reversing valve 7. The other ends of the two reversing valves 7 are connected to the oil feed pipe 9 of the drilling rig through oil pipes. The connection method is to use a three-way valve 15 to connect the oil pipe of the reversing valve 7 with the oil feed pipe 9 of the drilling rig. The oil outlets of the two oil cylinders 4 are connected to an oil return reversing valve 8 through a three-way valve 15, and the other end of the oil return reversing valve 8 is connected to the main oil return pipe 10 of the drilling rig.

[0022] like Figure 2 As shown, the oil feed pipe 9 includes a drilling rig feed hydraulic system oil feed pipeline 17 and a drilling rig rotation hydraulic system oil feed pipeline 16, and the drilling rig feed hydraulic system oil feed pipeline 17 and the drilling rig rotation hydraulic system oil feed pipeline 16 are respectively connected to a reversing valve 7.

[0023] The working process of this device is:

[0024] Power on the drilling rig and check whether the hydraulic circuit of the drilling rig is in normal state. When all the hydraulic circuits are normal, operate one of the reversing valves 7 to the "reverse" gear and the return oil reversing valve 8 to the "reverse" gear at the same time. At this time, the oil cylinder 4 extends; operate the other oil cylinder 4 to extend in the same way, and return all the reversing valves 7 to the "zero" gear after the operation is completed; then operate the two reversing valves 7 to the "forward" gear and the return oil reversing valve 8 to the "reverse" gear at the same time. At this time, the double oil cylinders 4 retract at the same time, driving the drilling rig forward. When the drilling rig is pulled to the construction position, the reversing valve 7 and the return oil reversing valve 8 are returned to the "zero" gear, and the pulling operation of the drilling rig is completed.

[0025] If the front support 13 and the rear support 14 of the drilling rig move forward asynchronously, the drilling rig will tilt forward and backward. Therefore, one of the reversing valves 7 can be operated to the "forward" gear and the return oil reversing valve 8 can be operated to the "reverse" gear until the front and rear supports 13 of the drilling rig are synchronized.

[0026] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double cylinder traction device for a tunnel drilling rig, characterized in that: include: A hydraulic circuit system, a traction and fixing system, and a control system. The hydraulic circuit system consists of two oil cylinders, an oil inlet pipe, an oil return pipe, an oil feed pipe, and a total oil return pipe. The control system consists of two reversing valves and an oil return reversing valve. The traction and fixing system consists of two pressure columns and a chain. The pressure column is fixedly arranged at a traction and fixing point, and the two ends of the chain are respectively connected to the pressure column and the front end of the oil cylinder. The two oil cylinders are respectively connected and fixed to the front support and the rear support of the drilling rig. The oil inlet of the oil cylinder is connected to the oil feed pipe of the drilling rig through the reversing valve and the oil inlet pipe. The oil outlet of the oil cylinder is connected to one of the oil return reversing valves through a three-way valve, and the other end of the oil return reversing valve is connected to the total oil return pipe of the drilling rig.

2. The double cylinder traction device for tunnel drilling rig according to claim 1, characterized in that: The oil feed pipe is connected to the two reversing valves through the three-way valve.

3. The double cylinder traction device for tunnel drilling rig according to claim 1, characterized in that: The oil feed pipe includes an oil feed pipeline of a drilling rig hydraulic system and an oil feed pipeline of a drilling rig rotation hydraulic system. The oil feed pipeline of the drilling rig hydraulic system and the oil feed pipeline of the drilling rig rotation hydraulic system are respectively connected to one of the reversing valves.

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