A structure for preventing drill bit failure of geological exploration pneumatic drilling rig

Abstract

The present invention discloses a structure for preventing drill bit failure in a geological exploration pneumatic drill. The structure comprises a pneumatic drill body, a guide lift seat fixed to the back of the pneumatic drill body, a guide connecting rod slidably sleeved in the guide lift seat, an adjustable base connected to the bottom of the guide connecting rod, and positioning conical feet provided at multiple end corners of the bottom of the adjustable base. The existing pneumatic drill is improved by adding a support structure and a guide lift component, and the angle of the pneumatic drill is fixed, so that the pneumatic drill can always move in a set direction during drilling operations. At the same time, an adjustment structure is designed to improve the stability of the pneumatic drill.

Description

Technical Field

[0001] The present invention relates to a structure for preventing drill bit failure in a geological exploration pneumatic drill, belonging to the technical field of geological exploration equipment. Background Art

[0002] The primary task of geological surveys for water conservancy and hydropower projects is to identify and evaluate the geological conditions relevant to project construction, predict potential engineering geological problems, propose necessary preventive measures and recommendations, and provide the necessary geological data for planning, design, and construction (Discussion on Geological Surveys for Water Conservancy Projects, Li Sheng et al., Theoretical Research on Urban Construction). Geological exploration techniques used in water conservancy project construction differ significantly from those used in coal mining, with two key differences being most significant. First, geological exploration techniques for water conservancy projects are more complex and tedious to implement; second, they require more advanced exploration skills and techniques. Determining whether the geology of a water conservancy project is suitable for mining often requires detailed and rigorous hydrogeological experiments.

[0003] The main challenges facing geological exploration during water conservancy project construction are environmental issues surrounding the project, which impact geological exploration work, and hydrological issues, which can also affect geological exploration during water conservancy project construction. Therefore, mastering scientific geological exploration methods is crucial. Currently, geological exploration methods primarily include geological surveying and design, engineering drilling, and engineering geophysical exploration. Engineering drilling is primarily conducted using specially designed drilling equipment. With years of technological advancement, drilling equipment can now utilize drill bits of varying materials to increase drilling speed and core recovery efficiency. In the past, drill bits in my country commonly used carbide or cemented carbide, but now many equipment are switching to diamond drill bits. This use of diamond has significantly advanced drilling technology (Technical Analysis of Geological Exploration for Water Conservancy Projects, Liang Chao, China New Technologies and New Products, 2016).

[0004] Pneumatic drills are a common drilling machine in geological exploration. However, the frequent failure modes of their drill bits have sounded alarms, drawing attention to the specific causes and mechanisms of failure. Drill bits, used to explore underground geological structures and rock formations, are inherently extremely durable and designed for exceptional strength. Their failure modes are not only due to metal fatigue from prolonged operation, but also to the auxiliary equipment attached to the drill bit. The drill bit's high-speed rotation during excavation requires it to be equipped with critical components such as hard alloy teeth and splines to ensure rapid exploration. Failures are often caused by malfunctions in these key components. To avoid the range of technical issues caused by drill bit failure, it's important to understand the mechanisms of drill bit failure. Some scholars believe that geological exploration drill bit failures are primarily caused by failures in the spline area, failure of the impact end face, wear of the carbide teeth, and breakage and loss of the carbide teeth.

[0005] To address the wear, breakage, and fallout of alloy teeth in drill bits, those skilled in the art have proposed solutions. For example, patent document CN103850652A discloses a process for inserting alloy teeth in rock drill bits. The process includes the following steps: 1. Processing a bushing from high-quality high-manganese steel round bar; 2. Vacuum quenching, tempering, and heat-insulating the processed bushing, followed by air cooling; 3. Fine-machining the inner bore of the bushing; 4. Heat-treating the bushing with the processed inner bore and pressing the alloy teeth into the bushing under appropriate conditions; 5. High-speed shot peening of the insert bushing; 6. Fine grinding of the outer surface of the insert bushing; and 7. Interference fit of the insert bushing into the tooth hole. This solution adds a bushing to the alloy teeth, which increases the length and enlarges the effective engagement surface to improve the holding force. It can appropriately reduce the interference without increasing the alloy cost, thereby making the teeth secure and protecting the drill bit body and alloy teeth from damage. At the same time, due to the protective effect of the bushing and the fact that the stress is basically eliminated during the bushing tooth setting process, the phenomenon of alloy tooth breakage and steel body collapse is significantly reduced, thereby extending the service life of the drill bit. For example, the invention patent jointly applied for by Southwest Petroleum University and Chengdu Weiyi Petroleum Technology Co., Ltd. (publication number: patent document CN106320989A) discloses a diamond drill bit, comprising a drill bit body and a plurality of blades extending from the drill bit body, on which cutting elements are arranged, and the drill bit has at least one annular blank band surrounding the center of the drill bit, and the blades at the position of the annular blank band are concave inward to form a circumferential through groove. This solution can reduce the cutting energy consumption of the drill bit and improve the rock breaking efficiency. At the same time, it can suppress the lateral vibration of the drill bit, effectively reduce the impact failure of the drill bit cutting teeth, enhance the anti-drift ability of the drill bit in directional drilling, and produce large-sized rock cuttings, improve the quality of geological logging, and improve the accuracy of downhole formation information analysis and judgment under actual drilling conditions (such as Figure 10 shown).

[0006] In addition, some technicians believe that the inability to regulate the strength of the drill bit's main cutters by region may also lead to drill bit failure. For example, a solution to this problem is disclosed in Chinese patent document CN113821894A, which is a drill bit design method based on the principle of local variable strength rock breaking. The method includes first dividing the drill bit into local crushing characteristic zones; then calculating the strength pattern factors of the local crushing characteristic zones; secondly, obtaining the difference between the strength pattern factors of the local crushing characteristic zones, and obtaining the sum of the horizontal cutting force vectors of the drill teeth corresponding to the same group of cutters on the drill bit; finally, using the difference between the strength pattern factors of the local crushing characteristic zones as the target control condition for drill bit design. Based on the principle of local variable strength rock breaking, this method divides the symmetrical cutters into groups and then adjusts the strength change factors at the symmetrical positions to balance them. The strength at different symmetrical positions on the drill bit can be adjusted to different levels, which can specifically change the rock breaking strength of different local crushing characteristic zones, eliminating drill bit failure caused by the inability to regulate the strength of each main cutter of a traditional drill bit by region, thereby improving the rock breaking efficiency of the drill bit and extending its service life.

[0007] However, some technicians have discovered that failure of the drill bit's impact end face is a major contributing factor to drill bit failure. During drilling operations, the impact end face can fail during high-speed rotation. The key to this failure is that the piston mechanism, constantly impacting and pounding, gradually generates excessive impact forces on the metal surface of the end face, which over-consumes the metal's fatigue resistance and easily leads to failure of the impact end face (Research on Failure Mechanisms of Geological Exploration Drill Bits, Li Dedong, Economic and Technical Cooperation Information, 2017). Scholars believe that during the impact process, the piston and the drill bit's impact mechanism cannot always maintain the same orientation. When the piston first impacts the end face, it is found that the piston never fully contacts the end face, and its position during impact is not fixed, remaining within a certain range. As a result, the direction and position of the impact force on the end face are constantly changing, failing to meet the requirements of the impact core. Over time, this condition causes fatigue and deformation of the metal on the end face. After repeated impacts and deformation, the end face will first show signs of cracking inside, which will then spread and extend to the surface of the end face, becoming increasingly severe, forming pits. As large-scale cracks appear, they gradually connect to form pits. The pits gradually grow larger and expand outward, causing some shallow parts of the end face to loosen and fall off. This part of the fallen material is continuously impacted by the piston, and the end face gradually fails. Therefore, the fundamental solution to this problem lies in how to ensure that the drilling direction of the drill bit does not deviate, which is essentially to solve the problem of supporting and positioning the drilling rig. Summary of the Invention

[0008] The purpose of the present invention is to address some problems of failure of the impact end face of geological exploration equipment in traditional technology, especially small hand-held pneumatic drills, and propose a structure to prevent the drill bit of geological exploration pneumatic drills from failing, so as to overcome the shortcomings of the existing technology.

[0009] The technical solution of the present invention is a structure for preventing the drill bit of a geological exploration pneumatic drill rig from failing, comprising a pneumatic drill rig main body, a guide lifting seat fixed to the back of the pneumatic drill rig main body, a guide connecting rod slidingly sleeved in the guide lifting seat, the bottom of the guide connecting rod is connected to an adjustment base frame, and positioning cone feet are provided at multiple end corners of the bottom of the adjustment base frame.

[0010] In the aforementioned structure for preventing the drill bit of a geological exploration pneumatic drill from failing, the adjusting base is hinged to the front lower end of the guide connecting rod, and two hinged ends are fixed on both sides of the top of the adjusting base, and a hinge column is rotatably inserted between the hinged ends, and the hinge column is fixed on the guide connecting rod. The upper end of the hinged end is a semicircular head structure, and a locking convex pattern is provided on the arc surface of the semicircular head structure. A lifting lock block is provided above the hinged end, and two guide lock columns are fixed on the upper surface of the lifting lock block. A locking top spring is sleeved on the guide lock column, and the guide lock column is fixed to the bottom surface of the assembly table at the lower end of the guide connecting rod. The lower surface of the lifting lock block is provided with an arc-shaped concave surface, and two groups of inner locking patterns are provided on the arc-shaped concave surface. The two groups of inner locking patterns correspond to the locking convex patterns on the hinged end respectively.

[0011] In the aforementioned structure for preventing the drill bit of a geological exploration pneumatic drill from failing, the assembly table is provided with two lifting slide holes for the guide lock columns to pass through, and the tops of the two guide lock columns after passing through the lifting slide holes are fixedly connected with an upward push connecting rod.

[0012] In the aforementioned structure for preventing the drill bit of a geological exploration pneumatic drill from failing, a trigger wedge surface is provided in the middle of the bottom surface of the upper push connecting rod, and a transverse sliding groove is provided on the guide connecting rod directly behind the upper push connecting rod, in which a propulsion adjustment rod is slidably connected, and a propulsion wedge surface is provided on the upper surface of the front end of the propulsion adjustment rod close to the upper push connecting rod, which cooperates with the trigger wedge surface, and a connecting plate is provided on the upper surface of the propulsion adjustment rod close to the side of the upper push connecting rod, and a reset spring is fixedly connected to the rear surface of the connecting plate, and the other end of the reset spring is fixedly connected to the guide connecting rod.

[0013] In the aforementioned structure for preventing drill bit failure of geological exploration pneumatic drill rigs, a lifting slot is provided in the middle of the rear surface of the guide lifting seat, a guide slot is provided on the guide connecting rod, and the lifting slot is slidably connected to the guide slot.

[0014] In the aforementioned structure for preventing drill bit failure of geological exploration pneumatic drill rigs, four lower legs are fixedly connected to the bottom of the adjustment chassis, and assembly holes are longitudinally opened on the lower legs, in which positioning cone legs are fixedly installed.

[0015] In the aforementioned structure for preventing the drill bit of a geological exploration pneumatic drill rig from failing, the positioning cone foot is a hollow structure, and the lower half of the positioning cone foot is a conical structure, an adjusting screw hole is provided in the middle of the upper surface of the positioning cone foot, and three side guide ports are evenly distributed on the conical surface of the positioning cone foot, an adjusting screw rod is threaded into the adjusting screw hole, and a lower locking block is slidably connected in each side guide port, and an adjusting thread is processed on the adjusting screw rod, and the lower end of the adjusting screw rod is fixedly connected to an inner conical top block of a frustum structure, and the conical end of the inner conical top block is set downward; a lower locking pattern is provided on the outer surface of the lower locking block, and an inner wedge groove is provided on the upper side of the inner edge of the lower locking block, and the inner wedge groove is an inclined groove body, and an inner reset frame is fixedly connected to the inner edge of the lower locking block, and a reset magnetic block is fixedly connected to the inside of the inner reset frame.

[0016] Beneficial effects of the present invention: Compared with the prior art, the present invention mainly includes the following three innovations:

[0017] 1. The pneumatic drill rig of the present invention is equipped with a support structure to fix the angle of the pneumatic drill rig, so that the pneumatic drill rig can always move in the set direction during drilling operations. The drilling feed distance and speed are controlled by the construction personnel, and the construction personnel are assisted by the bracket to control the direction of the pneumatic drill rig. In this way, the position of the drill bit during collision can be well fixed and maintained within a range. Therefore, the direction and position of the impact force on the end face can be limited to a narrow range, thereby effectively reducing the frequency of drill bit failure and increasing the service life. Correspondingly, it also reduces the labor intensity of the construction personnel and improves the efficiency of geological exploration. At the same time, the feed direction of the pneumatic drill rig is consistent, avoiding the problem of traditional handheld pneumatic drill rigs lacking a simple and stable support and positioning structure, which causes the drill rig to tilt due to vibration, resulting in the drill rig's drilling angle easily changing, thereby changing the drilling direction. Maintaining the same feed direction also helps to improve the accuracy of geological exploration.

[0018] When the adjusting screw rod is rotated, the adjusting screw rod and the adjusting screw hole form a spiral transmission, so that the adjusting screw rod moves downward, and the downward movement of the adjusting screw rod pushes the inner conical top block to move downward, and the inclined surface of the inner conical top block is tightly fitted with the inner wedge groove of the lower locking block to generate an extrusion force. Under the action of the downward movement of the inner conical top block, the lower locking block is pushed outward, so that the lower locking block squeezes the ground outside and is inserted into the ground through the lower locking pattern, thereby improving the firmness of the connection between the equipment positioning frame and the ground, and increasing the friction with the ground through the lower locking pattern, further locking the adjusting frame and the ground. This design also helps to limit the impact range of the drill bit during drilling, effectively avoiding metal fatigue and deformation caused by frequent deviation of the drill bit impact end face, and reducing the possibility of drill bit failure.

[0019] The cam is engaged with the locking cam and the lifting lock block, and the lifting lock block is pushed upward to release the locking cam from the inner locking groove, so that the angle between the guide link and the adjusting base is fixed. This function enables timely adjustment when the impact end face of the drill bit deviates, and also simplifies the adjustment steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the rear structure;

[0022] Figure 3 It is a structural diagram of the transverse chute;

[0023] Figure 4 It is a structural diagram of the guide link;

[0024] Figure 5 It is a structural diagram of the propulsion adjustment rod;

[0025] Figure 6 It is a structural diagram of the adjustable chassis;

[0026] Figure 7 1. It is a structural diagram of the adjusting rotary rod;

[0027] Figure 8 It is a structural diagram of the positioning cone foot;

[0028] Figure 9 It is a structural diagram of the lower locking block;

[0029] Figure 10 This is a schematic diagram of the structure of a diamond drill bit disclosed in the prior art.

[0030] Reference numerals: 1- pneumatic drill body; 2- handle; 3- guide lift seat; 301- lift slide; 4- guide connecting rod; 401- guide slide; 402- transverse slide; 403- hinged column; 404- assembly table; 4041- lift slide hole; 5- push adjustment rod; 501- connecting plate; 502- return spring; 503- push wedge surface; 6- lift lock block; 601- guide lock column; 6011- locking top spring; 6012- push-up connecting rod; 6013-trigger wedge surface; 602-inner locking groove; 7-adjustment base; 701-hinged end; 7011-locking convex groove; 702-lower support foot; 7021-assembly hole; 8-positioning cone foot; 801-adjustment screw hole; 802-side guide port; 9-adjustment rod; 901-adjustment thread; 902-inner conical top block; 10-lower locking block; 1001-lower locking groove; 1002-inner wedge groove; 1003-inner reset frame; 1004-reset magnetic block. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0032] Embodiments of the present invention: A structure for preventing the drill bit of a geological exploration pneumatic drill from failing, such as Figure 1-9 As shown, it includes a pneumatic drill body 1, a guide lifting seat 3 is fixed to the back of the pneumatic drill body 1, a guide link 4 is slidably sleeved in the guide lifting seat 3, the bottom of the guide link 4 is connected to an adjustment base 7, and positioning cone feet 8 are provided at multiple end corners of the bottom of the adjustment base 7.

[0033] When it is necessary to use the starting drill body 1 for drilling operations, the adjusting base 7 is placed on the ground and the positioning cone feet 8 are inserted into the soil, so that the adjusting base 7 is fixed, making the entire structure stable, and the pneumatic drill body 1 is guided by the guide connecting rod 4 to prevent the pneumatic drill body 1 from shaking during operation.

[0034] The adjusting base 7 is hinged to the front lower end of the guide link 4, and two hinged ends 701 are fixed on both sides of the top of the adjusting base 7, and a hinge column 403 is rotatably inserted between the hinged ends 701. The hinge column 403 is fixed on the guide link 4, and the upper end of the hinged end 701 is a semicircular head structure. The arc surface of the semicircular head structure is provided with a locking convex pattern 7011. A lifting lock block 6 is provided above the hinged end 701, and two guide lock columns 601 are fixed on the upper surface of the lifting lock block 6. A locking top spring 6011 is sleeved on the guide lock column 601, and the guide lock column 601 is fixed on the bottom surface of the assembly platform 404 at the lower end of the guide link 4. The lower surface of the lifting lock block 6 is provided with an arc-shaped concave surface, and two groups of inner locking patterns 602 are provided on the arc-shaped concave surface, and the two groups of inner locking patterns 602 correspond to the locking convex patterns 7011 on the hinged end 701 respectively.

[0035] The adjustment base 7 is hinged to the front lower end of the guide link 4, allowing adjustment and installation at any angle. During field operations, it is impossible to ensure that the installation surface of the adjustment base 7 is horizontal. If it is an inclined surface, the angle between the adjustment base 7 and the guide link 4 needs to be adjusted. In addition, when drilling an inclined hole, the angle between the adjustment base 7 and the guide link 4 also needs to be adjusted. During the drilling process, the angle between the adjustment base 7 and the guide link 4 should be ensured to remain unchanged, so the above-mentioned angle adjustment structure is designed. After the angle between the adjustment base 7 and the guide link 4 is confirmed, the lifting lock block 6, under the action of the elastic force of the locking top spring 6011, causes its inner locking pattern 602 to contact the locking convex pattern 7011 on the hinge end 701, achieving a locking limit, so that the hinge end 701 cannot rotate around the hinge column 403.

[0036] When the angle needs to be adjusted, the lifting lock block 6 is lifted upward to separate it from the hinged end 701, and the angle can be adjusted.

[0037] The assembly platform 404 is provided with two lifting slide holes 4041 for the guide lock column 601 to pass through. After passing through the lifting slide holes 4041, the tops of the two guide lock columns 601 are fixedly connected with an upward push connecting rod 6012. By pulling the push connecting rod 6012 upward, the lifting lock block 6 can be lifted upward, which facilitates the adjustment of the angle.

[0038] A trigger wedge surface 6013 is provided in the middle of the bottom surface of the push-up link 6012. A transverse slot 402 is provided on the guide link 4 directly behind the push-up link 6012. A push-adjustment rod 5 is slidably connected to the transverse slot 402. A push-adjustment rod 5 is provided on the upper surface of the front end of the push-up link 6012, which cooperates with the trigger wedge surface 6013. A connecting plate 501 is provided on the upper surface of the push-adjustment rod 5, which is close to the push-up link 6012. A return spring 502 is fixedly connected to the rear surface of the connecting plate 501. The other end of the return spring 502 is fixedly connected to the guide link 4. This structural design eliminates the need to manually lift the upgrade lock block 6 when the angle needs to be adjusted. Instead, the user can simply press the push-adjustment rod 5 with their foot to quickly lift the lift block 6 upward.

[0039] A lifting slot 301 is provided in the middle of the rear surface of the guide lifting seat 3 , and a guide slot 401 is provided on the guide connecting rod 4 . The lifting slot 301 is slidably connected to the guide slot 401 .

[0040] Four lower legs 702 are fixedly connected to the bottom of the adjustment base frame 7 . The lower legs 702 are provided with assembly holes 7021 running through them in the longitudinal direction. Positioning cone legs 8 are fixedly installed in the assembly holes 7021 .

[0041] The positioning cone foot 8 is a hollow structure, and the lower half of the positioning cone foot 8 is a conical structure. An adjusting screw hole 801 is provided in the middle of the upper surface of the positioning cone foot 8, and three side guide openings 802 are evenly distributed on the conical surface of the positioning cone foot 8. An adjusting screw rod 9 is screwed into the adjusting screw hole 801, and each side guide opening 802 is slidably connected with a lower locking block 10. The adjusting screw rod 9 is processed with an adjusting thread 901, and the lower end of the adjusting screw rod 9 is fixedly connected to an inner conical top block 902 of a frustum structure, and the cone end of the inner conical top block 902 is set downward; a lower locking pattern 1001 is provided on the outer surface of the lower locking block 10, and an inner wedge groove 1002 is provided on the upper side of the inner edge of the lower locking block 10, and the inner wedge groove 1002 is an inclined groove body, and an inner reset frame 1003 is fixedly connected to the inner edge of the lower locking block 10, and a reset magnetic suction block 1004 is fixedly connected to the inner reset frame 1003.

[0042] The technical solution of the present invention is further described below in conjunction with the specific structure of each component:

[0043] like Figure 1 As shown, the structure of the present invention for preventing the drill bit of a geological exploration pneumatic drill from failing mainly comprises:

[0044] 1) A pneumatic drill body 1, with a handle 2 fixedly connected to each side of the pneumatic drill body 1;

[0045] 2) A guide lifting seat 3, which is fixedly connected to the rear of the pneumatic drilling rig body 1 by bolts;

[0046] 3) Guide link 4, which is slidably connected to the guide lifting seat 3;

[0047] 4) Push the adjustment rod 5, which is slidably connected to the guide link 4;

[0048] 5) A lifting lock block 6, which is movably connected to the front of the guide link 4;

[0049] 6) Adjust the base frame 7, which is hinged to the front lower end of the guide link 4;

[0050] 7) Positioning cone foot 8, which is fixedly connected to the adjustment base frame 7, and has three lower locking blocks 10 slidably connected inside the positioning cone foot 8;

[0051] 8) Adjust the rotary rod 9, which is screwed onto the top of the positioning cone foot 8.

[0052] Among them, a lifting slot 301 is opened in the middle of the rear surface of the guide lifting seat 3, and a guide slot 401 is provided on the guide connecting rod 4; the lifting slot 301 is slidably connected with the guide slot 401, playing a guiding role, thereby realizing the guiding movement effect of the pneumatic drilling rig body 1.

[0053] like Figure 2 、 Figure 3 and Figure 4 As shown, a rectangular transverse slot 402 is formed transversely through the guide link 4. The propulsion adjustment rod 5 is slidably connected within the transverse slot 402, guiding the propulsion adjustment rod 5. A hinge post 403 is welded to the lower front surface of the guide link 4. The hinge post 403 is rotatably connected to the hinge end 701 on the adjustment base 7, achieving an articulated connection between the guide link 4 and the adjustment base 7. An assembly platform 404 is welded to the front surface of the guide link 4. Two lifting slide holes 4041 are formed longitudinally through the assembly platform 404, which are used to slide the guide lock column 601 through them.

[0054] like Figure 5 As shown, a connecting plate 501 is provided above the push-adjustment rod 5. A return spring 502 is fixedly connected to the rear surface of the connecting plate 501. The other end of the return spring 502 is fixedly connected to the front surface of the guide link 4. The return spring 502 serves to reset the push-adjustment rod 5. A push wedge surface 503 is formed on the upper front surface of the push-adjustment rod 5. When in operation, the push wedge surface 503 tightly contacts the trigger wedge surface 6013.

[0055] In addition, two guide lock posts 601 are welded to the upper surface of the lifting lock block 6. A locking spring 6011 is sleeved on the guide lock posts 601. The upper ends of the two guide lock posts 601 are fixedly connected by an upward push link 6012. A trigger wedge surface 6013 is provided in the middle of the lower surface of the guide lock posts 601. The lower surface of the lifting lock block 6 has an arc-shaped concave surface, which is provided with two sets of internal locking grooves 602.

[0056] like Figure 6 and Figure 7 As shown, a hinged end 701 is welded on both sides of the upper surface of the adjustment base 7, the upper end of the hinged end 701 is a semicircular head structure, and a locking convex pattern 7011 is provided on the arc surface of the hinged end 701. Four lower supporting feet 702 are fixedly connected to the bottom of the adjustment base 7, and an assembly hole 7021 is longitudinally opened on the lower supporting foot 702. The assembly hole 7021 is used to fix the positioning cone foot 8.

[0057] Under normal circumstances, under the tightening effect of the locking top spring 6011, the lower arc surface of the lifting lock block 6 fits tightly against the hinge end 701, and the hinge end 701 is locked through the cooperation between the inner locking pattern 602 and the locking convex pattern 7011, thereby fixing the angle between the guide link 4 and the adjustment base frame 7, thereby fixing the angle between the ground and the pneumatic drill rig body 1.

[0058] When adjusting the angle, the operator can push the propulsion adjustment rod 5 with his feet to move the propulsion adjustment rod 5 forward, and push the lifting lock block 6 upward by triggering the wedge surface 6013 to fit the propulsion wedge surface 503, so that the hinged end 701 is disengaged from the lock of the inner locking pattern 602, and the angle between the guide link 4 and the adjustment base 7 can be adjusted, thereby realizing the function of adjusting the drilling angle of the pneumatic drill body 1. The control is simple and no manual operation is required. The angle locking mechanism can be triggered by the foot to realize the adjustment function of the drilling direction of the pneumatic drill.

[0059] like Figure 7 and Figure 8 As shown, the positioning cone foot 8 is a hollow structure, and the lower half of the positioning cone foot 8 is a conical structure. An adjusting screw hole 801 is provided in the middle of the upper surface of the positioning cone foot 8. The adjusting screw hole 801 is used in conjunction with the adjusting thread 901 of the adjusting rod 9 to realize the up and down adjustment of the adjusting rod 9.

[0060] Three side guide openings 802 are formed on the conical surface of the positioning cone foot 8 , and the three side guide openings 802 are evenly distributed on the lower side of the outer surface of the positioning cone foot 8 , and a lower locking block 10 is installed in each side guide opening 802 .

[0061] like Figure 9As shown, an adjusting thread 901 is processed on the adjusting rotary rod 9, and the lower end of the adjusting rotary rod 9 is fixedly connected to an inner conical top block 902 of a truncated cone structure, and the tapered end of the inner conical top block 902 is set downward; a lower locking pattern 1001 is provided on the outer surface of the lower locking block 10, and an inner wedge groove 1002 is provided on the upper side of the inner edge of the lower locking block 10, and the inner wedge groove 1002 is an inclined groove body, and an inner reset frame 1003 is fixedly connected to the inner edge of the lower locking block 10, and a reset magnetic block 1004 is fixedly connected to the inside of the inner reset frame 1003.

[0062] In the above design, through the action of the reset magnetic block 1004, after the adjusting rotary rod 9 is reset, the three lower locking blocks 10 are moved toward the middle under the action of the reset magnetic block 1004 magnetic reset, thereby realizing the contraction and reset of the three lower locking blocks 10; when the pneumatic drilling rig is in use, the positioning cone foot 8 of the conical structure can be inserted into the ground of the explored area to improve the placement stability of the pneumatic drilling rig. In addition, a lower locking block 10 is also provided inside the positioning cone foot 8, and the lower locking block 10 cooperates with the adjusting rotary rod 9. When the adjusting rotary rod 9 is rotated, the adjustment The rotary rod 9 and the adjusting screw hole 801 form a spiral transmission, so that the adjusting rotary rod 9 moves downward, and the downward movement of the adjusting rotary rod 9 pushes the inner conical top block 902 to move downward. The inclined surface of the inner conical top block 902 fits tightly with the inner wedge groove 1002 of the lower locking block 10 and generates an extrusion force. Under the action of the downward movement of the inner conical top block 902, the lower locking block 10 is pushed outward, so that the lower locking block 10 squeezes the land on the outside, and the friction with the ground is increased through the lower locking pattern 1001, so that the lower locking block 10 is tightly plugged into the ground, further improving the stability of the equipment installation.

[0063] In actual use, it should be implemented according to the following steps:

[0064] First, place the equipment on the ground in the exploration area with the bottom of the adjustment base 7 facing downward, and then apply a certain pressure to the adjustment base 7 to insert the conical positioning cone foot 8 into the ground in the exploration area, and then rotate the adjustment rod 9 to move the adjustment rod 9 downward. The inclined surface of the inner conical top block 902 fits tightly with the inner wedge groove 1002 of the lower locking block 10 to generate an extrusion force. Under the action of the downward movement of the inner conical top block 902, the lower locking block 10 is pushed outward, so that the lower locking block 10 squeezes the land on the outside, and the friction with the ground is increased through the lower locking pattern 1001, so that the lower locking block 10 is tightly plugged into the ground.

[0065] When the operator presses the lever 5 downwards, the operator can push the lever 5 forward and the operator can adjust the angle of the guide link 4 and the adjusting base 7 by pressing the lever 5 downwards.

[0066] The design concept of this invention is as follows: by improving the existing pneumatic drill, adding a support structure and a guide lifting component, the pneumatic drill is fixed at an angle, so that the pneumatic drill can always move in a set direction during drilling operations. At the same time, an adjustment structure is designed to improve the stability of the pneumatic drill.

[0067] The adjustment structure adopts a uniquely designed adjustment base frame 1, and a four-way positioning cone foot 8 is designed under the adjustment base frame 1. When the pneumatic drill is in use, the positioning cone foot 8 of the cone structure can be inserted into the ground of the exploration area to improve the stability of the pneumatic drill. In addition, a locking block structure - a lower locking block 10 is designed inside the positioning cone foot 8, so that the lower locking block 10 cooperates with an adjustment rod 9. When the adjustment rod 9 is rotated, the adjustment rod 9 and the adjustment screw hole 801 form a spiral transmission, so that the adjustment rod 9 moves downward. The downward movement of the adjustment rod 9 pushes the inner conical top block 902 to move downward. The inclined surface of the inner conical top block 902 is tightly fitted with the inner wedge groove 1002 of the lower locking block 10 to generate an extrusion force. Under the action of the downward movement of the inner conical top block 902, the lower locking block 10 is pushed outward, so that the lower locking block 10 squeezes the ground outside, thereby improving the firmness of the connection between the equipment adjustment base frame 7 and the ground.

[0068] In addition, a lifting lock block 6 structure is designed to achieve angle adjustment. The principle of the method is that the lifting lock block 6 structure is pushed upward by the designed trigger wedge surface 6013 and the push wedge surface 503, so that the hinge end 701 is released from the locking of the lifting lock block 6 to achieve angle adjustment.

Claims

1. A structure for preventing a drill bit of a geological exploration pneumatic drill from failing, comprising a pneumatic drill body (1), characterized in that: A guide lifting seat (3) is fixed to the back of the pneumatic drilling rig body (1), a guide connecting rod (4) is slidably sleeved in the guide lifting seat (3), an adjustment base (7) is connected to the bottom of the guide connecting rod (4), and positioning cone feet (8) are provided at multiple end corners of the bottom of the adjustment base (7); The adjusting base (7) is hinged to the front lower end of the guide link (4), and two hinged ends (701) are fixed on both sides of the top of the adjusting base (7). A hinged column (403) is rotatably inserted between the hinged ends (701), and the hinged column (403) is fixed on the guide link (4). The upper end of the hinged end (701) is a semicircular head structure, and a locking convex pattern (7011) is provided on the arc surface of the semicircular head structure. A lifting lock block (6) is provided above the hinged end (701). Two guide lock posts (601) are fixed on the upper surface of the lifting lock block (6), a locking top spring (6011) is sleeved on the guide lock post (601), and the guide lock post (601) is fixed on the bottom surface of the assembly table (404) at the lower end of the guide link (4). The lower surface of the lifting lock block (6) is provided with an arc-shaped concave surface, and two groups of inner locking grooves (602) are provided on the arc-shaped concave surface. The two groups of inner locking grooves (602) respectively correspond to the locking convex grooves (7011) on the hinge end (701); The assembly platform (404) is provided with two lifting sliding holes (4041) for the guide lock columns (601) to pass through. After passing through the lifting sliding holes (4041), the tops of the two guide lock columns (601) are fixedly connected with an upward push connecting rod (6012).

2. The structure for preventing drill bit failure of a geological prospecting pneumatic drill according to claim 1, characterized in that: A trigger wedge surface (6013) is provided in the middle of the bottom surface of the push-up connecting rod (6012), a transverse sliding groove (402) is provided on the guide connecting rod (4) directly behind the push-up connecting rod (6012), a propulsion adjustment rod (5) is slidably connected in the transverse sliding groove (402), a propulsion adjustment rod (5) is provided with a propulsion wedge surface (503) matching the trigger wedge surface (6013) on the front upper surface of the propulsion adjustment rod (5) close to the push-up connecting rod (6012), a connecting plate (501) is provided on the upper surface of the side of the propulsion adjustment rod (5) close to the push-up connecting rod (6012), a return spring (502) is fixedly connected to the rear surface of the connecting plate (501), and the other end of the return spring (502) is fixedly connected to the guide connecting rod (4).

3. The structure for preventing drill bit failure of a geological prospecting pneumatic drill according to claim 1 is characterized in that: A lifting slot (301) is provided in the middle of the rear surface of the guide lifting seat (3), a guide slot (401) is provided on the guide connecting rod (4), and the lifting slot (301) is slidably connected to the guide slot (401).

4. The structure for preventing drill bit failure of a geological prospecting pneumatic drill according to claim 1 is characterized in that: Four lower supporting feet (702) are fixedly connected to the bottom of the adjustment base frame (7), and assembly holes (7021) are longitudinally penetrated on the lower supporting feet (702), and positioning cone feet (8) are fixedly installed in the assembly holes (7021).

5. The structure for preventing drill bit failure of a geological prospecting pneumatic drill according to claim 4 is characterized in that: The positioning cone foot (8) is a hollow structure, and the lower half of the positioning cone foot (8) is a conical structure. An adjusting screw hole (801) is provided in the middle of the upper surface of the positioning cone foot (8). Three side guide openings (802) are evenly distributed on the conical surface of the positioning cone foot (8). An adjusting rod (9) is screwed into the adjusting screw hole (801). A lower locking block (10) is slidably connected in each side guide opening (802). An adjusting thread (901) is processed on the adjusting rod (9). The lower end of the adjusting rod (9) is The end is fixedly connected to an inner conical top block (902) with a truncated cone structure, and the conical end of the inner conical top block (902) is arranged downward; a lower locking pattern (1001) is provided on the outer surface of the lower locking block (10), an inner wedge groove (1002) is provided on the upper side of the inner edge of the lower locking block (10), and the inner wedge groove (1002) is an inclined groove body; an inner reset frame (1003) is fixedly connected to the inner edge of the lower locking block (10), and a reset magnetic block (1004) is fixedly connected inside the inner reset frame (1003).

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