Rotary excavating drill bit convenient for unloading soil

Abstract

A rotary excavating drill bit facilitating soil unloading comprises a rotary excavating drill bit body, the rotary excavating drill bit body comprises a drilling barrel, a horizontally-arranged partition plate is fixed to the upper side of the interior of the drilling barrel, an inner cavity of the drilling barrel is divided into an upper equipment cavity and a lower working cavity through the partition plate, a rotating part is installed in the equipment cavity, and a soil scraping assembly is installed in the working cavity; the rotating part comprises a transmission column and a lower circular plate which are coaxially arranged with the drilling barrel, the transmission column is rotationally connected with the drilling barrel, the top of the transmission column extends out of the drilling barrel, a connecting base connected with a drilling rod of the rotary drilling rig is fixed to the top of the transmission column, the lower circular plate is fixed to the bottom of the transmission column, and a through hole matched with the lower circular plate in size is formed in the middle of the partition plate. The lower circular plate is mounted in the through hole, and the lower circular plate is in sliding connection with the inner wall of the through hole; according to the utility model, scraping cleaning and vibration cleaning can be carried out on a soil layer in the drill cylinder, the residual quantity and adhesion phenomena of soil in the drill cylinder are greatly reduced, and the soil unloading efficiency is obviously improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction equipment, in particular to a rotary drilling bit which is convenient for unloading soil. Background Art

[0002] The rotary drilling rig has the problem of difficulty in unloading slag during construction, especially in the construction process of clay layer. The clay is very sticky and will adhere to the wall of the drill tube. At present, the rotary drilling bucket unloads soil by swinging the drill tube to throw the soil layer out of the bucket. However, if it encounters a strong sticky soil layer such as clay soil, it is difficult to unload the soil cleanly. Often, there will be a layer of soil left on the wall of the drill bucket, which needs to be cleaned manually. On the one hand, the attached soil layer will increase the resistance of the drill bit to drill, and on the other hand, manual cleaning will greatly reduce the construction efficiency. Utility Model Content

[0003] The utility model solves the shortcomings of the prior art and provides a rotary drilling bit which can scrape the soil layer in a drill tube so that the inner wall of the drill tube can be cleaned and is convenient for unloading soil.

[0004] In order to achieve the above-mentioned purpose, the utility model firstly proposes a rotary drilling bit which is convenient for unloading soil, comprising a rotary drilling bit body, the rotary drilling bit body comprising a drill barrel, a horizontally arranged partition is fixed on the upper side of the inside of the drill barrel, the partition divides the inner cavity of the drill barrel into an upper equipment cavity and a lower working cavity, a rotating part is installed in the equipment cavity, and a soil scraping assembly is installed in the working cavity;

[0005] The rotating member includes a transmission column and a lower circular plate arranged coaxially with the drill tube, the transmission column is rotatably connected to the drill tube, the top of the transmission column extends out of the drill tube, a connecting base connected to the drill rod of the rotary drilling rig is fixed on it, and the bottom of the transmission column is fixed with the lower circular plate, and a through hole matching the size of the lower circular plate is provided in the middle of the partition, and in the initial state, the lower circular plate is installed in the through hole, and the lower circular plate is slidably connected to the inner wall of the through hole;

[0006] The scraper assembly includes two scrapers symmetrically distributed around the transmission column. The scrapers are arranged vertically and match the height of the working chamber. The upper side of the scraper is fixed to the lower circular plate through a connecting rod, and the blade side of the scraper is close to the inner wall of the drill tube. A synchronization assembly for opening and closing the transmission column and rotating synchronously with the drill tube is also installed in the equipment chamber of the drill tube.

[0007] In the drilling state, the synchronization component controls the transmission column and the drill barrel to rotate synchronously. At this time, the scraper and the drill barrel are relatively stationary, and the scraping component does not work; in the cleaning state, the synchronization component releases the synchronization between the transmission column and the drill barrel, and the circular plate rotates relative to the drill barrel under the drive of the transmission column. At this time, the scraper moves along the inner wall of the drill barrel to scrape off the soil layer attached to the inner wall of the drill barrel.

[0008] By adopting the above structure, the synchronization component can control whether the drill barrel rotates synchronously with the transmission column; after connecting the connecting base with the drill rod of the rotary drilling rig, the synchronization component controls the transmission column and the drill barrel to rotate synchronously. At this time, the rotation of the drill rod of the rotary drilling rig drives the drill barrel and the working head to dig. When a certain working time is reached, the soil will adhere to the wall of the drill barrel. When the drill barrel needs to be cleaned, the rotary drilling rig controls the drill rod to rotate left and right to throw out the soil layer in the drill barrel, and the synchronization component releases the synchronization between the transmission column and the drill barrel, and the transmission column drives the lower circular plate to rotate relative to the drill barrel. At this time, the scraper moves along the inner wall of the drill barrel, and the soil layer attached to the inner wall of the drill barrel is scraped off by the scraper to clean the inner wall of the drill barrel.

[0009] In this embodiment, the synchronization component includes a push rod, a gear installed in the equipment cavity, and a gear ring matching the gear. The top of the drill barrel and the two sides of the transmission column are symmetrically and slidably installed with push rods arranged parallel to the transmission column. The bottom of the push rod passes through the drill barrel and is arranged in the equipment cavity. The top of the push rod extends out of the drill barrel and a push block is installed on it. The push rod is provided with a tensioning spring on one side outside the drill barrel, one end of the tensioning spring is fixed to the bottom of the top block, and the other end is fixed to the drill barrel. The gear and the gear ring are coaxially mounted on the transmission column, the gear ring is fixed to the bottom ends of the two push rods, and the gear is fixed to the transmission column; in the drilling state, under the action of the tensioning spring, the bottom of the push rod drives the gear ring to engage with the gear, so as to realize the synchronous rotation of the transmission column and the drill barrel; in the cleaning state, the push rod is pressed down, the push rod drives the gear ring to separate from the gear, and the transmission column and the drill barrel are desynchronized.

[0010] By adopting the above structure, when it is necessary to clean the drill barrel, the rotary drilling rig controls the drill rod to move upward so that the top block abuts against the lower side of the power head of the rotary drilling rig, the top rod moves downward to compress the tensioning spring, and the top rod moves downward relative to the drill barrel. At this time, the ring gear is separated from the gear, the drill barrel stops rotating, and the transmission column drives the scraper assembly to rotate; when the cleaning is completed, the rotary drilling rig controls the drill rod to move downward, the top block does not abut against the power head of the rotary drilling rig, the tensioning spring returns the top rod, and the ring gear meshes with the gear. At this time, the drill barrel and the transmission column are relatively fixed and run synchronously; in the process of separation and re-engagement of the ring gear and the gear, the ring gear may not align with the teeth of the gear. When the working head of the drill barrel abuts against the ground and the rotating part rotates, the gear and the ring gear can be automatically aligned under the action of the tensioning spring.

[0011] The coordination of the gear and the gear ring enables the opening and closing of the synchronous component to be controlled by simply contracting the drill rod of the rotary drilling rig. At the same time, the structure of the synchronous component is simple, which reduces maintenance costs and improves the reliability and production efficiency of the equipment. The synchronous component can automatically control the vibration component to vibrate and loosen the drill barrel when the drill rod is contracted, thereby reducing the drilling resistance of the drill bit. The scraper component removes the soil layer inside the drill barrel when the rotating part and the drill barrel move relative to each other, reducing the work intensity of the staff while improving the construction efficiency.

[0012] In this embodiment, a rubber anti-skid pad is installed on the upper side of the top block. The rubber anti-skid pad can increase the friction between the top block and the power head of the rotary drilling rig, prevent the drill tube from rotating with the rotating parts during cleaning, and improve stability.

[0013] In the present embodiment, a vibration component is also installed in the equipment cavity on the upper side of the partition, and the vibration component includes a plurality of vertically arranged arc-shaped triangular plates, and the plurality of arc-shaped triangular plates are evenly fixed on the upper side of the lower circular plate with the transmission column as the center, and the plurality of arc-shaped triangular plates are arranged in sequence along the circumferential direction head to tail, and the top surfaces of all the arc-shaped triangular plates are on the same circular path with the transmission column as the center to form a vibration channel, and two vertically arranged elastic telescopic rods are symmetrically fixed on the top inner wall of the drill tube with the transmission column as the center, and a guide wheel is installed on the bottom end of the elastic telescopic rod through a fixed bracket, and the guide wheel is on the vibration channel.

[0014] In this embodiment, hard springs arranged radially are fixed on the two side surfaces of the fixed bracket respectively, the end of one hard spring extends above the partition to form a knocking end, and the end of the other hard spring is arranged above the lower circular plate to form a knocking end, and knocking hammers are fixed on the knocking ends of the two hard springs.

[0015] In the cleaning state, the transmission column drives the lower circular plate to rotate, so that the vibration channel formed by the arc-shaped triangular plate moves. At this time, due to the ups and downs of the arc-shaped triangular plate, the guide wheel of the elastic telescopic rod moves up and down along the vibration channel along the ups and downs of the arc-shaped triangular plate. When the guide wheel falls from a high place, the hard spring will drive the percussion hammer to knock on the partition and the lower circular plate, thereby causing the drill barrel to vibrate. In this way, the rotary drilling rig knocks on the drill barrel to generate vibration while the scraping assembly cleans the soil in the drill barrel, which can loosen the soil adhering to the drill barrel, greatly reducing the residual amount and adhesion of soil in the drill barrel, and significantly improving the efficiency of soil unloading.

[0016] In this embodiment, the arc-shaped triangular plate is arranged vertically with the lower circular plate, the top surface of the arc-shaped triangular plate is an inclined surface, the side with a lower height of the top surface of the arc-shaped triangular plate is connected with the top surface of the lower circular plate to form the inlet end of the guide wheel, and the side with a higher height of the top surface of the arc-shaped triangular plate is the outlet end of the guide wheel. When the transmission column and the drill tube move relative to each other, the inlet end of the arc-shaped triangular plate first contacts the guide wheel, and as the arc-shaped triangular plate continues to rotate, the guide wheel is lifted by the top surface of the arc-shaped triangular plate, causing the elastic telescopic rod to compress, and when the guide wheel leaves the top surface from the outlet end of the arc-shaped triangular plate, the guide wheel is quickly smashed downward under the elastic force of the elastic telescopic rod, and the percussion hammer driven by the hard spring due to inertia strikes the partition and the lower circular plate, achieving vibration caused by the percussion of the drill tube, and then the cycle is repeated to achieve continuous vibration.

[0017] In this embodiment, the upper side of the elastic telescopic rod is hinged to the inner wall of the drill tube, and a limit rod is fixed on the leeward side of the elastic telescopic rod. When the elastic telescopic rod is in a vertical state, the top of the limit rod abuts against the top of the drill tube.

[0018] With the above structure, the utility model has the following advantages:

[0019] 1. The device has a soil scraping component, and the synchronous component can control whether the drill barrel rotates synchronously with the transmission column; after the connection base is connected to the drill rod of the rotary drilling rig, the synchronous component controls the transmission column and the drill barrel to rotate synchronously. At this time, the rotation of the drill rod of the rotary drilling rig drives the drill barrel and the working head to dig. When a certain working time is reached, the soil will adhere to the wall of the drill barrel. When the drill barrel needs to be cleaned, the rotary drilling rig controls the drill rod to rotate left and right to throw out the soil layer in the drill barrel. The synchronous component releases the synchronization of the transmission column and the drill barrel, and the transmission column drives the lower circular plate to rotate relative to the drill barrel. At this time, the scraper moves along the inner wall of the drill barrel, and the soil layer attached to the inner wall of the drill barrel is scraped off by the scraper to clean the inner wall of the drill barrel;

[0020] 2. The device is provided with a vibration component. The transmission column drives the lower circular plate to rotate, so that the vibration channel formed by the arc-shaped triangular plate moves. At this time, due to the ups and downs of the arc-shaped triangular plate, the guide wheel of the elastic telescopic rod moves up and down along the vibration channel along the ups and downs of the arc-shaped triangular plate. When the guide wheel falls from a high place, the hard spring will drive the percussion hammer to knock the partition and the lower circular plate, thereby causing the drill barrel to vibrate. In this way, when the scraping component of the rotary drilling rig cleans the soil in the drill barrel, the drill barrel is knocked to generate vibration, which can loosen the soil adhering to the drill barrel, greatly reducing the residual amount and adhesion of soil in the drill barrel, and significantly improving the efficiency of soil unloading.

[0021] In summary, the utility model can scrape and clean the soil layer in the drill tube and vibrate and clean it, which greatly reduces the residual amount and adhesion of soil in the drill tube and significantly improves the efficiency of unloading soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 3 It is a schematic diagram of the bottom structure of the utility model.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0026] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0027] Figure 6 It is a schematic cross-sectional structure diagram of the utility model from another angle.

[0028] Figure 7for Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0029] In the attached figure: 1. drill barrel; 2. working head; 3. partition; 4. transmission column; 5. lower circular plate; 6. push rod; 7. push block; 8. tension spring; 9. connecting base; 10. arc-shaped triangular plate; 11. elastic telescopic rod; 12. guide wheel; 13. hard spring; 14. percussion hammer; 15. gear; 16. gear ring; 17. scraper; 18. rubber anti-skid pad; 19. limit rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Embodiment 1:

[0033] like Figure 1-7As shown, a rotary drilling bit convenient for unloading soil comprises a rotary drilling bit body, the rotary drilling bit body comprises a drill barrel 1, a plurality of working heads 2 are evenly arranged on the bottom end of the wall of the drill barrel 1, a horizontally arranged partition 3 is fixed on the upper side of the inside of the drill barrel 1, the partition 3 divides the inner cavity of the drill barrel 1 into an upper equipment cavity and a lower working cavity, a rotating member is installed in the equipment cavity; the rotating member comprises a transmission column 4 and a lower circular plate 5 coaxially arranged with the drill barrel 1, the transmission column 4 is rotatably connected to the drill barrel 1, the top of the transmission column 4 extends out of the drill barrel 1, a connecting base 9 connected to the drill rod of the rotary drilling rig is fixed on it, a lower circular plate 5 is fixed to the bottom of the transmission column 4, a through hole matching the size of the lower circular plate 5 is provided in the middle of the partition 3, in the initial state, the lower circular plate 5 is installed in the through hole, and the lower circular plate 5 is slidably connected to the inner wall of the through hole; a soil scraping assembly is fixed on the lower side of the lower circular plate 5, the soil scraping assembly It includes two scrapers 17 arranged in the working chamber of the drill barrel 1 and symmetrically distributed with the transmission column as the center. The scrapers 17 are arranged vertically and match the height of the working chamber. The upper side of the scraper 17 is fixed to the lower circular plate 5 through a connecting rod, and the blade side of the scraper 17 is close to the inner wall of the drill barrel 1; a synchronization component for opening and closing the transmission column 4 and the drill barrel 1 to rotate synchronously is also installed in the equipment chamber of the drill barrel 1; in the drilling state, the synchronization component controls the transmission column 4 and the drill barrel 1 to rotate synchronously. At this time, the scraper 17 and the drill barrel 1 are relatively stationary, the scraping component does not work, and will not interfere with the operation of the drill barrel 1; in the cleaning state, the synchronization component releases the synchronization of the transmission column 4 and the drill barrel 1, and the transmission column 4 drives the lower circular plate 5 to rotate relative to the drill barrel 1. At this time, the scraper 17 moves along the inner wall of the drill barrel 1, and the soil layer attached to the inner wall of the drill barrel 1 is scraped off by the scraper 17, so that the inner wall of the drill barrel 1 is cleaned.

[0034] When the utility model is in use, the synchronization component can control whether the drill barrel 1 rotates synchronously with the transmission column 4. After the connecting base 9 is connected to the drill rod of the rotary drilling rig, the synchronization component controls the transmission column 4 to rotate synchronously with the drill barrel 1. At this time, the rotation of the drill rod of the rotary drilling rig drives the drill barrel 1 and the working head 2 to dig. When a certain working time is reached, the soil will adhere to the wall of the drill barrel 1. When the drill barrel 1 needs to be cleaned, the rotary drilling rig controls the drill rod to rotate left and right to throw out the soil layer in the drill barrel 1. In case of a soil layer with strong viscosity, the synchronization component releases the synchronization of the transmission column 4 and the drill barrel 1, and the transmission column 4 drives the lower circular plate 5 to rotate relative to the drill barrel 1. At this time, the scraper 17 moves along the inner wall of the drill barrel 1, and the soil layer attached to the inner wall of the drill barrel 1 is scraped off by the scraper 17, so that the inner wall of the drill barrel 1 is cleaned.

[0035] The synchronization assembly includes a mandrel 6, a gear 15 installed in the equipment cavity, and a gear ring 16 matched with the gear 15. The mandrel 6 arranged parallel to the transmission column 4 is symmetrically slidably installed on the top of the drill tube 1 and on both sides of the transmission column 4. The bottom of the mandrel 6 passes through the drill tube 1 and is arranged in the equipment cavity. The top of the mandrel 6 extends out of the drill tube 1 and a top block 7 is installed thereon. Furthermore, a rubber anti-skid pad 18 is installed on the upper side of the top block 7. The rubber anti-skid pad 18 can increase the friction between the top block 7 and the power head of the rotary drilling rig, prevent the drill tube 1 from rotating with any rotating parts during cleaning, and improve stability.

[0036] A tensioning spring 8 is provided on one side of the outer side of the drill tube 1 of the push rod 6, one end of the tensioning spring 8 is fixed to the bottom of the push block 7, and the other end is fixed to the drill tube 1. One end of the two push rods 6 is fixed to the ring gear 16 in the equipment cavity, and the gear 15 is installed in the equipment cavity and coaxially fixed to the transmission column 4. In the drilling state, under the action of the tensioning spring 8, the bottom of the push rod 6 drives the ring gear 16 to connect with the gear 15, so as to realize the synchronous rotation of the transmission column 4 and the drill tube 1; in the cleaning state, the push rod 6 is pressed down, and the push rod 6 drives the ring gear 16 to separate from the gear 15, so that the transmission column 4 and the drill tube 1 are desynchronized; specifically, when the drill tube 1 needs to be cleaned, the rotary drilling rig controls the drill rod to move upward, so that the power of the push block 7 and the rotary drilling rig The lower side of the head abuts, compressing the tensioning spring 8, and the push rod 6 moves downward relative to the drill tube 1. At this time, the ring gear 16 is separated from the gear 15, the drill tube 1 stops rotating, and the transmission column 4 drives the scraper assembly to rotate; when the cleaning is completed, the rotary drilling rig controls the drill rod to move downward, and the top block 7 does not abut against the power head of the rotary drilling rig. The tensioning spring returns the push rod 6 to make the ring gear 16 mesh with the gear 15. At this time, the drill tube 1 and the transmission column 4 are relatively fixed and run synchronously; in the process of the ring gear 16 separating and then meshing with the gear 15, the ring gear 16 may not align with the teeth of the gear 15. When the working head 2 of the drill tube 1 abuts against the ground and the rotating part rotates, the gear 15 and the ring gear 16 can be automatically aligned under the action of the tensioning spring 8.

[0037] The cooperation between the gear 15 and the gear ring 16 enables the opening and closing of the synchronous assembly to be controlled by simply contracting the drill rod of the rotary drilling rig. At the same time, the synchronous assembly has a simple structure, which reduces maintenance costs and improves the reliability and production efficiency of the equipment. The synchronous assembly can automatically control the vibration assembly to vibrate and loosen the drill tube 1 when the drill rod is contracted, thereby reducing the drilling resistance of the drill bit. The scraper assembly removes the soil layer inside the drill tube 1 when the rotating part and the drill tube 1 move relative to each other, thereby reducing the work intensity of the staff and improving the construction efficiency.

[0038] like Figure 4 , 5As shown in , 7, a vibration component for vibrating and unloading soil is also installed in the equipment cavity on the upper side of the partition 3, and the vibration component includes a vertically arranged arc-shaped triangular plate 10, and a plurality of arc-shaped triangular plates 10 are evenly fixed on the upper side of the lower circular plate 5 with the transmission column 4 as the center, and the plurality of arc-shaped triangular plates 10 are arranged in sequence along the circumferential direction head to tail, and the top surfaces of all the arc-shaped triangular plates 10 are on the same circumferential path with the transmission column 4 as the center to form a vibration channel, and two vertically arranged elastic telescopic rods 11 are symmetrically fixed on the top inner wall of the drill tube 1 with the transmission column 4 as the center, and a guide wheel 12 is installed at the bottom end of the elastic telescopic rod 11 through a fixed bracket, and the guide wheel 12 is on the vibration channel, and hard springs 13 arranged in the radial direction are respectively fixed on the two side surfaces of the fixed bracket, and the end of one hard spring 13 extends into the upper side of the partition 3 to form a knocking end, and the end of the other hard spring 13 is arranged above the lower circular plate 5 to form a knocking end, and a knocking hammer 14 is fixed on the knocking end of the two hard springs 13;

[0039] When in the cleaning state, the transmission column 4 drives the lower circular plate 5 to rotate, so that the vibration channel formed by the arc-shaped triangular plate 10 moves. At this time, due to the ups and downs of the arc-shaped triangular plate 10, the guide wheel 12 of the elastic telescopic rod 11 moves up and down along the vibration channel along the ups and downs of the arc-shaped triangular plate 10. When the guide wheel 12 falls from a high place, the hard spring 13 will drive the percussion hammer 14 to knock the partition 3 and the lower circular plate 5, thereby causing the drill barrel 1 to vibrate. In this way, the rotary drilling rig knocks the drill barrel 1 to generate vibration while the scraping assembly cleans the soil in the drill barrel 1, which can loosen the soil adhering to the drill barrel 1, greatly reducing the residual amount and adhesion of soil in the drill barrel 1, and significantly improving the efficiency of unloading soil.

[0040] Specifically, the arc-shaped triangular plate 10 is arranged perpendicular to the lower circular plate 5, and the top surface of the arc-shaped triangular plate 10 is an inclined surface. The side with a lower top surface height of the arc-shaped triangular plate 10 is connected to the top surface of the lower circular plate 5 to form the inlet end of the guide wheel 12, and the side with a higher top surface height of the arc-shaped triangular plate 10 is the outlet end of the guide wheel 12. When the transmission column 4 and the drill tube 1 move relative to each other, the inlet end of the arc-shaped triangular plate 10 first contacts the guide wheel 12. As the arc-shaped triangular plate 10 continues to rotate, the guide wheel 12 is lifted by the top surface of the arc-shaped triangular plate 10, so that the elastic telescopic rod 11 is compressed. When the guide wheel 12 leaves the top surface from the outlet end of the arc-shaped triangular plate 10, the guide wheel 12 is quickly smashed downward under the elastic force of the elastic telescopic rod 11. Due to the action of inertia, the percussion hammer 14 driven by the hard spring 13 strikes the partition 3 and the lower circular plate 5, thereby achieving vibration caused by the percussion of the drill tube 1, and then cycles in sequence to achieve continuous vibration.

[0041] Embodiment 2:

[0042] like Figure 4-7As shown, further improvements are made on the basis of Example 1, the upper side of the elastic telescopic rod 11 is hinged to the inner wall of the drill barrel, and a limit rod 19 is fixed on the leeward side of the elastic telescopic rod. When the rotating member 4 rotates forward, the limit rod 19 abuts against the inner wall of the top of the drill barrel 1.

[0043] With the above structure, when the rotating part 4 rotates in the forward direction, the limit rod 19 abuts against the top of the drill tube 1, thereby preventing the elastic telescopic rod 11 from rotating around the hinge axis. At this time, the elastic telescopic rod 11 can move from the inlet end to the outlet end of the arc-shaped triangular plate 10, and the extension and contraction of the elastic telescopic rod 11 is realized through the arc-shaped triangular plate 10; when the rotating part 4 rotates in the reverse direction, the outlet end of the arc-shaped triangular plate 10 will first touch the elastic telescopic rod 11. At this time, the limit rod 19 fails, and the arc-shaped triangular plate 10 will cause the elastic telescopic rod 11 to rotate around the hinge axis. The elastic telescopic rod 11 avoids the arc-shaped triangular plate 10 by rotating around the hinge axis, thereby avoiding the rotating part 4 from rotating in the reverse direction due to an accident, preventing equipment damage, and improving the reliability of the equipment.

[0044] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotary drilling bit for easy soil unloading, characterized in that: The rotary drilling bit body includes a drill barrel, a horizontally arranged partition is fixed on the upper side of the drill barrel, and the partition divides the inner cavity of the drill barrel into an upper equipment cavity and a lower working cavity, a rotating part is installed in the equipment cavity, and a scraping assembly is installed in the working cavity; The rotating member includes a transmission column and a lower circular plate arranged coaxially with the drill tube, the transmission column is rotatably connected to the drill tube, the top of the transmission column extends out of the drill tube, a connecting base connected to the drill rod of the rotary drilling rig is fixed on it, and the bottom of the transmission column is fixed with the lower circular plate, and a through hole matching the size of the lower circular plate is provided in the middle of the partition, and in the initial state, the lower circular plate is installed in the through hole, and the lower circular plate is slidably connected to the inner wall of the through hole; The scraper assembly includes two scrapers symmetrically distributed around the transmission column. The scrapers are arranged vertically and match the height of the working chamber. The upper side of the scraper is fixed to the lower circular plate through a connecting rod, and the blade side of the scraper is close to the inner wall of the drill tube. A synchronization assembly for opening and closing the transmission column and rotating synchronously with the drill tube is also installed in the equipment chamber of the drill tube. In the drilling state, the synchronization component controls the transmission column and the drill barrel to rotate synchronously. At this time, the scraper and the drill barrel are relatively stationary, and the scraping component does not work; in the cleaning state, the synchronization component releases the synchronization between the transmission column and the drill barrel, and the circular plate rotates relative to the drill barrel under the drive of the transmission column. At this time, the scraper moves along the inner wall of the drill barrel to scrape off the soil layer attached to the inner wall of the drill barrel.

2. The rotary drilling drill bit for easy soil unloading according to claim 1, characterized in that: The synchronization component includes a push rod, a gear installed in the equipment cavity, and a gear ring matching the gear. Push rods arranged parallel to the transmission column are symmetrically and slidably installed on the top of the drill barrel and on both sides of the transmission column. The bottom of the push rod passes through the drill barrel and is arranged in the equipment cavity. The top of the push rod extends out of the drill barrel and a push block is installed on it. The push rod is provided with a tensioning spring on one side outside the drill barrel, one end of the tensioning spring is fixed to the bottom of the top block, and the other end is fixed to the drill barrel. The gear and the gear ring are coaxially mounted on the transmission column, the gear ring is fixed to the bottom ends of the two push rods, and the gear is fixed to the transmission column; in the drilling state, under the action of the tensioning spring, the bottom of the push rod drives the gear ring to mesh with the gear, so that the transmission column and the drill barrel rotate synchronously; in the cleaning state, the push rod is pressed down, the push rod drives the gear ring to separate from the gear, and the transmission column and the drill barrel are desynchronized.

3. The rotary drilling drill bit for easy soil unloading according to claim 2, characterized in that: A rubber anti-skid pad is installed on the upper side of the top block.

4. The rotary drilling drill bit for easy soil unloading according to claim 2, characterized in that: A vibration component is also installed in the equipment cavity on the upper side of the partition, and the vibration component includes a plurality of vertically arranged arc-shaped triangular plates, and the plurality of arc-shaped triangular plates are evenly fixed on the upper side of the lower circular plate with the transmission column as the center, and the plurality of arc-shaped triangular plates are arranged in sequence along the circumferential direction from head to tail, and the top surfaces of all the arc-shaped triangular plates are on the same circular path with the transmission column as the center to form a vibration channel, and two vertically arranged elastic telescopic rods are symmetrically fixed on the top inner wall of the drill tube with the transmission column as the center, and a guide wheel is installed on the bottom end of the elastic telescopic rod through a fixed bracket, and the guide wheel is on the vibration channel.

5. The rotary drilling drill bit for easy soil unloading according to claim 4, characterized in that: Hard springs arranged radially are fixed on the two side surfaces of the fixed bracket respectively, the end of one hard spring extends above the partition to form a knocking end, the end of the other hard spring is arranged above the lower circular plate to form a knocking end, and knocking hammers are fixed on the knocking ends of the two hard springs.

6. The rotary drilling drill bit for easy soil unloading according to claim 4, characterized in that: The arc-shaped triangular plate is arranged perpendicularly to the lower circular plate, the top surface of the arc-shaped triangular plate is an inclined surface, the lower side of the top surface of the arc-shaped triangular plate is connected with the top surface of the lower circular plate to form the inlet end of the guide wheel, and the higher side of the top surface of the arc-shaped triangular plate is the outlet end of the guide wheel.

7. The rotary drilling drill bit for easy soil unloading according to claim 4, characterized in that: The upper side of the elastic telescopic rod is hinged to the inner wall of the drill tube. A limit rod is fixed on the leeward side of the elastic telescopic rod. When the elastic telescopic rod is in a vertical state, the top of the limit rod abuts against the top of the drill tube.

Images