Broken drill rod repairing device for drill jumbo

Abstract

The broken drill rod repairing device of the drill jumbo comprises a base, and a rear support and a front support are arranged on the base. A positioning device is arranged at the rear part of the base, the positioning device is tubular and is provided with an internal thread, and the internal thread is matched with an external thread at a spiral joint at the tail part of the finished drill rod; a connecting device is in threaded connection with the interior of the positioning device, the rear section of the connecting device is rod-shaped and is provided with an external thread identical to a spiral joint of the tail part of the finished drill rod, and the front end of the connecting device is provided with a prismatic groove identical to the finished drill rod in shape and size; a front seat is fixedly connected to the front end of the base, a cutting machine is arranged on the front seat, and an included angle between a cutting blade of the cutting machine and a vertical plane of a thread axis of a scrapped drill rod is equal to a lead angle of an external thread at a spiral joint of the tail of a finished drill rod; the broken part at the tail spiral joint can be repaired and put into use again, so that the material cost of the drill rod is prevented from being too high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mine equipment, and particularly relates to a broken drill rod repairing device for a rock drilling jumbo. BACKGROUND

[0002] The rock drilling jumbo is also called a drilling jumbo, and is a rock drilling equipment used for drilling and blasting in coal mines and underground engineering, and can move and support multiple rock drills to simultaneously perform drilling operations. The rock drilling jumbo is mainly used for underground mine roadway excavation, mine room drilling and blasting, coal mine roadway excavation and drilling, and other engineering such as water diversion tunnels of hydropower stations, anchor holes of reservoir dam foundations, and city underground pipe gallery support holes.

[0003] In the process of coal mine roadway excavation, some rocks are relatively hard, and the tail end of the drill rod often appears to be broken at the spiral connection, which leads to the whole drill rod being scrapped and unable to be used, causing the material cost to be over budget, affecting normal operation, and directly restricting the construction progress. SUMMARY

[0004] The purpose of the present application is to provide a broken drill rod repairing device for a rock drilling jumbo, which can repair the broken part at the tail end of the spiral connection and put it back into use, so as to avoid the over budget of the drill rod material cost.

[0005] The present application adopts the following technical scheme: a broken drill rod repairing device for a rock drilling jumbo, comprising a base, a rear support and a front support are arranged on the base respectively, and the rear support and the front support are used for placing the scrapped drill rod to be repaired; A positioning device is arranged at the rear part of the base, the positioning device is tubular and has an internal thread, and the internal thread is matched with the external thread of the tail end of the spiral connection of the finished drill rod; The connecting device is connected with the internal thread of the positioning device, the rear section of the connecting device is rod-shaped and has the same external thread as the tail end of the spiral connection of the finished drill rod, and the front end of the connecting device has a prismatic recess which is the same in shape and size as the finished drill rod. The front end of the base is fixedly connected with a front seat, a cutting machine is arranged on the front seat, and the included angle between the cutting blade of the cutting machine and the perpendicular plane of the thread axis of the scrapped drill rod is equal to the thread rise angle of the external thread of the tail end of the spiral connection of the finished drill rod.

[0006] The present application has the following beneficial effects: the present application can place the scrapped drill rod through the front support and the rear support, connect the front end of the scrapped drill rod with the positioning device through the connecting device, place the end to be repaired of the scrapped drill rod at the cutting blade, cut the same external thread as the finished drill rod on the outer periphery of the end to be repaired when the scrapped drill rod is rotated, thereby realizing the repair and reuse of the scrapped drill rod, and avoiding the over budget of the drill rod material cost. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is a structure schematic view of the broken drill rod repairing device for the rock drilling jumbo according to the present application. Figure 2 It is another view of the structure of the broken drill rod repairing device of the rock drilling jumbo; Figure 3 It is a use state reference diagram of the broken drill rod repairing device of the rock drilling jumbo.

[0008] Wherein: 10. Base; 20. Rear support; 30. Front support; 40. Positioning device; 50. Front seat; 60. Cutting machine; 61. Cutting blade; 70. Connecting device; 80. Scrap drill rod; 81. Connecting section. DETAILED DESCRIPTION

[0009] The application will be described in detail below in combination with the drawings and specific embodiments.

[0010] The application discloses a broken drill rod repairing device of a rock drilling jumbo, as shown in Figure 1 and Figure 2 The broken drill rod repairing device of the rock drilling jumbo comprises a base 10, the base 10 is provided with a rear support 20 and a front support 30, respectively, and the rear support 20 and the front support 30 are used for placing a scrap drill rod 80 to be repaired; the rear part of the base 10 is provided with a positioning device 40, the positioning device 40 is tubular and has an internal thread, the internal thread is matched with an external thread at a tail part of a finished drill rod; the positioning device 40 is connected with a connecting device 70 in a threaded manner, the rear section of the connecting device 70 is rod-shaped and has the same external thread as the tail part of the finished drill rod, and the front end of the connecting device 70 has a prismatic recess which is the same in shape and size as the finished drill rod; the front end of the base 10 is fixedly connected with a front seat 50, the front seat 50 is provided with a cutting machine 60, and the included angle between the cutting blade 61 of the cutting machine 60 and the perpendicular plane of the thread axis of the scrap drill rod 80 is equal to the thread rise angle of the external thread at the tail part of the finished drill rod.

[0011] The broken drill rod repairing device of the rock drilling jumbo can place the scrap drill rod 80 through the front support 30 and the rear support 20, connect the front end of the scrap drill rod 80 with the positioning device 40 through the connecting device, place the end to be repaired of the scrap drill rod 80 at the cutting blade 61, cut the same external thread as the finished drill rod on the outer periphery of the end to be repaired when the scrap drill rod 80 is rotated, thereby realizing the repair and reuse of the scrap drill rod 80 and avoiding the cost overrun of the drill rod material.

[0012] In one embodiment, the base 10 is a telescopic base, and the rear support 20 and the front support 30 are respectively located on different telescopic segments of the base 10. By designing the telescopic base, the device can be applied to different lengths of the scrapped drill rod 80, and the length of the base 10 is adjusted according to the length of the scrapped drill rod 80. In addition, the rear support 20 and the front support 30 are respectively located on different telescopic segments of the base 10, which can realize stable support of the scrapped drill rod 80, so that the front part and the rear part of the scrapped drill rod 80 are supported, thereby making the rod body more firm during machining of the threaded connection.

[0013] During machining of the scrapped drill rod 80, the front part is supported by the front support 30, and the rear part is supported by the rear support 20. However, this support method still belongs to point support. In order to support more stably, the top of the base 10 has an arc-shaped groove for accommodating the bottom of the scrapped drill rod 80. In this way, the bottom of the scrapped drill rod 80 is always supported by the arc-shaped groove.

[0014] As a specific implementation manner, as shown in Figure 3 The front support 30 includes two rollers which are symmetrically and spaced apart, and the two rollers form an accommodation space for accommodating the scrapped drill rod 80. Specifically, the rollers can be realized by bearings, the middle part of the bearing is sleeved on a fixed shaft, the fixed shaft has the same direction as the scrapped drill rod 80, that is, the axis is parallel, and the front and rear ends of the fixed shaft are fixed on the base 10 through connecting pieces. More specifically, the rear support 20 and the front support 30 have the same structure, so that they bear the same force.

[0015] In one embodiment, the rear part of the base 10 is provided with a front-rear strip-shaped groove, and the bottom of the positioning device 40 has a fixing hole; the strip-shaped groove and the fixing hole are fixed by bolts. Through such a fixing mode, the relative position of the positioning device 40 and the base 10 can be finely adjusted.

[0016] Since the cutting machine 60 machines the scrapped drill rod 80, and the threaded connection to be machined has different depths, the cutting machine 60 is connected with the front seat 50 through the lifting device. When fine machining is needed, the operator can adjust the height of the cutting machine 60 according to the need, so that the threaded connection machined on the scrapped drill rod 80 has higher consistency with the finished drill rod.

[0017] In the present application, a polishing device is also included, which can polish the to-be-machined part of the scrapped drill rod 80, so that the surface of the to-be-machined part of the scrapped drill rod 80 is smooth and flat. In addition, the threaded connection machined by the cutting machine 60 can also be locally polished to remove burrs.

[0018] The use method of the present repairing device is as follows: Firstly, the positioning device 40 is installed on the base 10; the length of the base 10 is adjusted according to the length of the scrapped drill rod 80; one end of the scrapped drill rod 80 is inserted into the prismatic groove at the front end of the connecting device 70, and then the outer thread of the connecting device 70 is screwed onto the positioning device 40; the scrapped drill rod 80 is placed on the front support 30 and the rear support 20, so that the to-be-processed part of the scrapped drill rod 80 is located at the cutting blade 61; then the cutting machine 60 is started, and the scrapped drill rod 80 is rotated to advance from back to front, in the process, the to-be-processed part of the scrapped drill rod 80 is processed into an external thread by the cutting blade 61, and the external thread matches the internal thread of the positioning device 40.

Claims

1. A device for repairing broken drill bits on a rock drilling rig, characterized in that, Includes a base (10), on which a rear bracket (20) and a front bracket (30) are respectively provided, the rear bracket (20) and the front bracket (30) are used to place the scrapped drill rod (80) to be repaired. The base (10) is provided with a positioning device (40) at the rear. The positioning device (40) is tubular and has an internal thread. The internal thread matches the external thread at the helical connection of the tail of the finished drill rod. The positioning device (40) is internally threaded with a connecting device (70). The rear section of the connecting device (70) is rod-shaped and has the same external thread as the spiral connection at the tail of the finished drill rod. The front end of the connecting device (70) has a prismatic groove with the same shape and size as the finished drill rod. The front end of the base (10) is fixedly connected to a front seat (50), and a cutting machine (60) is provided on the front seat (50). The angle between the cutting blade (61) of the cutting machine (60) and the vertical plane of the thread axis of the scrapped drill rod (80) is equal to the thread helix angle of the external thread at the helical connection of the tail of the finished drill rod.

2. The rock drilling rig broken chisel repair device as described in claim 1, characterized in that, The base (10) is a telescopic base, and the rear bracket (20) and the front bracket (30) are located on different telescopic sections of the base (10).

3. The rock drilling rig broken chisel repair device as described in claim 2, characterized in that, The base (10) has an arc-shaped groove at the bottom for accommodating the bottom of the scrapped drill rod (80).

4. The rock drilling rig broken chisel repair device as described in claim 3, characterized in that, The front support (30) includes two rollers that are symmetrically arranged on the left and right and spaced apart, and a receiving space is formed between the two rollers for accommodating the scrapped drill rod (80); wherein the axis of the rollers is parallel to the axis of the scrapped drill rod (80).

5. A rock drilling rig broken drill bit repair device as described in claim 4, characterized in that, The rear support (20) has the same structure as the front support (30).

6. A rock drilling rig broken drill bit repair device as described in claim 3 or 4, characterized in that, The base (10) has a front-to-back oriented strip groove at the rear, and the positioning device (40) has a fixing hole at the bottom; the strip groove and the fixing hole are fixed by bolts.

7. A rock drilling rig broken drill bit repair device as described in claim 6, characterized in that, The cutting machine (60) is connected to the front seat (50) via a lifting device.

8. A rock drilling rig broken drill bit repair device as described in claim 7, characterized in that, It also includes a polishing device.

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