A drilling orientation device for improving the accuracy of blast holes
The drilling orientation device, which uses a support frame, orientation plate, and worm gear transmission, solves the problems of high physical strength and operational difficulty for drillers during blasting drilling, achieves control over drilling accuracy and deviation, reduces the labor intensity of drillers, and prevents drilling deviation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA HYDROPOWER ELEVENTH ENG BUREAU (ZHENGZHOU) CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-19
AI Technical Summary
In existing technologies, manual guidance is required during blasting drilling, which demands high physical strength and operational experience from the driller and is prone to phenomena such as drill rod jumping, bending of the blasting hole, or drill drift.
A drilling orientation device was designed, comprising a support frame, an orientation plate, a thrust bearing, and a worm gear drive. The accuracy of the drill rod's drilling angle and position is ensured by the cooperation of the thrust bearing and the limiting ribs, and the angle is fixed by utilizing the self-locking property of the worm gear.
Without restricting the turnover of the drill rod, the accuracy of blasting drilling was improved, the labor intensity of the driller was reduced, and drilling deviation and drift phenomena were effectively prevented.
Smart Images
Figure CN224379786U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of underground engineering construction technology, and in particular relates to a drilling orientation device for improving the accuracy of blasting drilling. Background Technology
[0002] The construction of underground powerhouses involves a large number of blasting operations. Among them, the drilling for smooth blasting is generally carried out using YT-28 pneumatic rock drills. The rock drills provide guidance and support and some jacking power through air legs. However, in actual application, manual guidance is still required to control the drilling speed and drilling pressure. Otherwise, the drill rod may jump up, causing the blasting hole to bend and the drill to drift. This places higher demands on the driller's physical strength and operating experience. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a drilling orientation device that improves the accuracy of blasting drilling. This utility model has a simple structure and can effectively ensure that the drilling angle and deviation of the blasting hole meet the design requirements without restricting the drill rod circumferential drilling and drilling action, thus greatly reducing the labor intensity of the driller.
[0004] To achieve the above objectives, the present invention provides the following technical solution:
[0005] A drilling orientation device for improving the accuracy of blasting drilling, the device includes a vertically arranged support frame and an orientation plate rotatably arranged on the top of the support frame, the orientation plate is provided with at least two positioning rings, and the inner ring surface of the positioning rings is fixed with a coating layer for interference fit drilling rods;
[0006] A limiting mechanism is also provided between the directional plate and the support frame to limit the included angle between them.
[0007] Preferably, the positioning ring includes a thrust bearing, the outer ring of which is slidably connected to the directional plate; the covering layer is a rubber ring and the outer wall of the rubber ring is integrally bonded to the inner wall of the inner ring of the thrust bearing.
[0008] Preferably, the directional plate is in the shape of an arc panel and its inner arc surface is disposed against the outer wall of the outer ring of the thrust bearing.
[0009] Preferably, the inner arc surface of the directional plate is also integrally provided with an axially extending limiting rib, and the outer ring of the thrust bearing cooperates with the limiting rib through a preset sliding groove.
[0010] Preferably, the limiting mechanism includes a connecting block that is fixedly connected to the directional plate, and both ends of the connecting block are fixedly connected to a rotating shaft that is rotatably mounted on the support frame.
[0011] Preferably, a worm gear is fixedly sleeved on the end of the shaft exposed outside the support frame, and a worm is also rotatably mounted on the support frame, the worm and the worm gear forming a worm gear transmission.
[0012] The working process of this utility model is as follows:
[0013] First, the support frame is fixed on the ground. Then, the drill rod of the rock drill is inserted into the rubber ring, thus fixing the thrust bearing and the drill rod relatively. Next, the worm gear is rotated, and the rotation of the shaft-connecting block-directional plate-thrust bearing-drill rod is achieved through the transmission of the worm gear, so that the drilling angle of the drill rod meets the design requirements. After the adjustment is completed, the self-locking property of the worm gear is used to fix the angle.
[0014] Then, the drill bit and rock drill are connected, and the rock drill is started. The drill bit drills in a straight line while rotating to remove rock dust generated during drilling. During this process, the straight drilling of the drill bit is ensured by the cooperation of the thrust bearing and the limiting ribs. Simultaneously, the rotation of the drill bit is compensated for by the relative rotation of the inner and outer rings of the thrust bearing, thus preventing interference with the straight drilling action. This overall process ensures that the drilling angle and deviation meet design requirements and effectively prevents drill drift and misalignment. At the same time, the directional plate can support the weight of the rock drill and drill bit, significantly reducing the driller's workload.
[0015] After drilling is completed, the drill rod is withdrawn from the blast hole, causing the thrust bearing to reset on the guide plate. Finally, the drill rod and rubber ring are separated. The rubber ring, utilizing its deformation effect, can be used with drill rods of various outer diameters, while reducing the vibration transmitted to the driller's hand during drilling.
[0016] Compared with the prior art, the present invention has the following advantages: The present invention has a simple structure and can effectively ensure that the drilling angle and deviation of the blasting hole meet the design requirements without restricting the drill rod circumferential drilling and drilling action, thus greatly reducing the labor intensity of the driller. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the drilling orientation device described in a specific embodiment;
[0018] Figure 2 This is a schematic diagram of the thrust bearing described in a specific embodiment. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0020] like Figure 1-2 As shown, a drilling orientation device for improving the accuracy of blasting drilling is disclosed. The device includes a vertically arranged support frame 1 and an orientation plate 2 in the shape of an arc panel. An axially extending limiting rib 21 is integrally provided on the inner arc surface of the orientation plate 2.
[0021] One end of the directional plate 2 is fixedly connected to the connecting block 11, and both ends of the connecting block 11 are fixedly connected to the rotating shaft 12 rotatably disposed at the top of the support frame 1. A worm gear 13 is fixedly sleeved on the end of the rotating shaft 12 exposed outside the support frame. A worm 14 is also rotatably mounted on the support frame 13. The worm 14 and the worm gear 13 form a worm gear transmission.
[0022] At least two thrust bearings 3 are also provided on the inner arc surface of the directional plate 2. The outer ring body 3 of the thrust bearing 3 is attached to the outer wall of the inner arc surface of the directional plate 2, and the outer ring body 31 of the thrust bearing 3 cooperates with the limiting rib 21 through the preset sliding groove 34.
[0023] A rubber ring 33 is integrally bonded to the inner wall of the inner ring body 32 of the thrust bearing 3, and the rubber ring 33 is interference-fitted with the chisel.
[0024] The working process of this utility model is as follows:
[0025] First, the support frame 1 is fixed on the ground. Then, the drill rod of the rock drill is inserted into the rubber ring 33, thus achieving relative fixation between the thrust bearing 3 and the drill rod. Next, the worm gear 14 is rotated, and the rotation of the shaft 12-connecting block 11-directional plate 2-thrust bearing 3-drill rod is achieved through the transmission of the worm gear, so that the drilling angle of the drill rod meets the design requirements. After adjustment, the self-locking property of the worm gear is used to fix the angle.
[0026] Then, the drill bit and rock drill are connected, and the rock drill is started. The drill bit drills in a straight line while rotating to remove rock dust generated during drilling. During this process, the straight drilling of the drill bit is ensured by the cooperation of the thrust bearing 3 and the limiting rib 21. Simultaneously, the rotation of the drill bit is compensated for by the relative rotation of the inner ring 32 and outer ring 31 of the thrust bearing, thus preventing interference with the straight drilling action. This overall process ensures that the drilling angle and deviation meet design requirements and effectively prevents drill drift and misalignment. At the same time, the directional plate 2 can support the weight of the rock drill and drill bit, significantly reducing the driller's workload.
[0027] After drilling is completed, the drill rod is withdrawn from the blast hole, causing the thrust bearing 3 to reset on the guide plate 2. Finally, the drill rod and rubber ring 33 are separated. The rubber ring 33 can be used with drill rods of various outer diameters due to its deformation effect, while reducing the vibration transmitted to the driller's hand during drilling.
Claims
1. A borehole orientation device for improving the accuracy of a blast hole, characterised in that, The device includes a vertically arranged support frame and a directional plate rotatably arranged on the top of the support frame. The directional plate is provided with at least two positioning rings, and the inner ring surface of the positioning rings is fixed with a covering layer for interference fit drilling rods. A limiting mechanism is also provided between the directional plate and the support frame to limit the included angle between them.
2. The drilling orientation device for improving the accuracy of blasting drilling as described in claim 1, characterized in that, The positioning ring includes a thrust bearing, and the outer ring of the thrust bearing is slidably connected to the directional plate. The covering layer is a rubber ring, and the outer wall of the rubber ring is integrally bonded to the inner wall of the inner ring of the thrust bearing.
3. The drilling orientation device for improving the accuracy of blasting drilling as described in claim 2, characterized in that, The directional plate is in the shape of an arc panel, and its inner arc surface is attached to the outer wall of the outer ring of the thrust bearing.
4. The drilling orientation device for improving the accuracy of blasting drilling as described in claim 3, characterized in that, The inner arc surface of the directional plate is also integrally provided with an axially extending limiting rib, and the outer ring of the thrust bearing cooperates with the limiting rib through a preset sliding groove.
5. The drilling orientation device for improving the accuracy of blasting drilling as described in claim 1, characterized in that, The limiting mechanism includes a connecting block that is fixedly connected to the directional plate, and both ends of the connecting block are fixedly connected to a rotating shaft that is rotatably mounted on the support frame.
6. The drilling orientation device for improving the accuracy of blasting drilling as described in claim 5, characterized in that, A worm gear is fixedly sleeved on the end of the shaft exposed outside the support frame, and a worm is also rotatably mounted on the support frame. The worm and the worm gear constitute a worm gear transmission.