A pick barrel drill capable of automatically adjusting pick height

Abstract

The present invention provides a pick barrel drill capable of automatically adjusting the height of a pick, comprising a cylindrical barrel, a pick disc, a control and disassembly assembly, and a control and adjustment pick assembly, wherein the cylindrical barrel and the pick disc are connected in a vertically cooperative manner, the cylindrical barrel is located at the upper part of the pick disc, the cylindrical barrel is a hollow cylinder, the lower inner wall of the cylindrical barrel is provided with strip-shaped protrusions, the upper outer wall of the pick disc is provided with strip-shaped grooves, the strip-shaped grooves and the strip-shaped protrusions of the cylindrical barrel are correspondingly matched, and pick grooves are evenly distributed on the upper and lower transition sections of the pick disc. On the one hand, the present invention reduces the damage to the pick caused by uneven load through structural design, shortens the time and frequency of replacing the pick, and on the other hand, through the design of the pick mounting structure, realizes convenient and quick replacement of the pick, avoids frequent repair welding of the pick fixing sleeve, and thus improves work efficiency and service life.

Description

Technical Field

[0001] The invention relates to a tunneling machine, and more particularly to a pick barrel drill capable of automatically adjusting the height of the pick. Background Art

[0002] In recent years, with the large-scale construction of bridges, railways, tunnels and other projects in the country, the requirements for the stability of equipment in tunneling projects have become increasingly higher. The most important equipment in tunneling projects is the tunnel boring machine. In the actual working process, the tunnel boring machine mainly performs tunneling work by rotating the pick at the front end of the barrel drill. Therefore, the pick plays a very critical role in the entire equipment. However, due to the harsh working environment of tunneling, the pick often wears out and fails and is frequently replaced, which directly affects the working efficiency, service life and energy consumption of the tunnel boring machine. At present, the main failure forms of picks are tooth body bending, cutter head wear, tooth body wear, cutter head falling off, and cutter head breakage. Among them, tooth body bending, cutter head wear and tooth body wear are the main forms of pick failure. Through dynamic analysis, it can be known that in the actual working environment, the main reason for the failure of the pick is that the uneven force causes individual picks to be subjected to excessive force and then excessive wear in advance. Therefore, we should try to avoid the situation where only a few picks are in working state, which leads to uneven force, which will increase the load of individual picks and accelerate wear, greatly shorten the service life, further increase the replacement frequency of picks, and reduce work efficiency. On the other hand, the existing tunnel boring machine barrel drill structure is not conducive to the replacement of picks. The pick sleeve at the bottom of the barrel drill is mostly a one-end open hole structure. The pick needs to be hit at the open end to achieve the installation and replacement of the pick. The one-way hitting is very easy to cause the damage of the pick sleeve, especially when replacing and disassembling. This requires the pick sleeve to be repaired by welding, and the precision limitation of on-site repair welding will have an adverse effect on the position of the pick. This not only poses the risk of the pick falling off easily, but also causes the pick to fail prematurely during the tunneling process, thereby shortening the service life of the equipment. Therefore, it is very urgent to develop a pick barrel drill that can automatically adjust the height of the pick and facilitate the replacement of the pick. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a pick barrel drill which can automatically adjust the height of the pick. On the one hand, the structural design reduces the damage to the pick caused by uneven load and shortens the time and frequency of replacing the pick. On the other hand, the design of the pick mounting structure makes the replacement of the pick quick and convenient, avoids the frequent repair welding of the pick fixing sleeve, and thus improves the work efficiency and service life.

[0004] According to the present invention, a tooth barrel drill capable of automatically adjusting the height of the tooth is provided, and its main technical scheme is as follows: the barrel drill comprises a cylindrical barrel, a tooth disc, a control splitting assembly, and a control and adjustment tooth assembly, the cylindrical barrel and the tooth disc are connected in a vertical manner, the cylindrical barrel is located on the upper part of the tooth disc, the cylindrical barrel is a hollow cylinder, the radius of the lower inner wall of the cylindrical barrel is larger than the radius of the upper inner wall of the cylindrical barrel, strip-shaped protrusions are distributed on the lower inner wall of the cylindrical barrel, the tooth disc is a hollow stepped disc, the radius of the upper outer wall of the tooth disc is smaller than the radius of the lower outer wall of the tooth disc, strip-shaped grooves are distributed on the upper outer wall of the tooth disc, the strip-shaped grooves and the strip-shaped protrusions of the cylindrical barrel correspond to each other, and the tooth grooves are evenly distributed on the upper and lower transition sections of the tooth disc.

[0005] The invention provides a pick barrel drill capable of automatically adjusting the pick height, and also adopts the following auxiliary technical solutions:

[0006] The strip-shaped protrusions distributed on the inner wall of the lower part of the cylindrical barrel extend all the way to the lower end surface of the cylindrical barrel. The outer wall surface of the lower part of the cylindrical barrel is distributed with circular holes, which penetrate the inner and outer wall of the cylindrical barrel. The control splitting component is located in the circular hole.

[0007] The strip-shaped grooves distributed on the upper outer wall of the pick disc extend downward from the upper part of the pick disc, and the strip-shaped grooves have the same shape and length as the strip-shaped protrusions. The radius of the upper outer wall of the pick disc is equal to the radius of the lower inner wall of the cylindrical barrel, the radius of the lower outer wall of the pick disc is equal to the radius of the outer wall of the cylindrical barrel, and the radius of the inner wall of the pick disc is equal to the radius of the upper inner wall of the cylindrical barrel.

[0008] The control disassembly component mainly includes a cylindrical pin, a pin tongue, an elastic element and a spring tongue. The cylindrical pin is a cylinder. There is a circular pit at each end of the cylindrical pin. There is a groove on the inner wall of the circular pit at the outer end. The groove has a certain length and depth. The cylindrical pin passes through the cylindrical wall and is inserted into the upper outer wall of the pick disc. The cylindrical pin can reciprocate along its axis. The pin tongue is located in the cylindrical pin and the two are coaxial. The outer end of the pin tongue is cylindrical, and the top of the pin tongue is semi-spherical. Rectangular convexities are distributed on the cylinder at the outer end of the pin tongue. The rectangular convex Located in the groove of the cylindrical pin, the pin tongue can reciprocate along the groove, the elastic element is located in the groove and contacts the rectangular convexity, the spring tongue is respectively located at the upper part, the lower part and the top of the cylindrical pin, the spring tongue is composed of a spring and a tongue, the tongues of the upper and lower spring tongues are in contact with the top of the pin tongue, the tongues of the upper and lower spring tongues can move up and down, the top spring tongue is located in the circular pit at the top of the cylindrical pin, the top spring tongue contacts the pick disc, the tongue of the top spring tongue is coaxial with the cylindrical pin, and the top spring tongue can move left and right along its axis.

[0009] At least three control splitting components are evenly distributed on the cylindrical barrel.

[0010] The center line of the pick groove is an arc line with different radii, and the center line of the pick groove is concentric with the pick disc.

[0011] The inner wall of the pick groove is an arc surface, and upper teeth and lower teeth are distributed on the inner wall surface of the pick groove at different depths. The upper teeth are evenly distributed on the inner wall surface of the pick groove outside the center line of the pick groove, and the lower teeth are evenly distributed on the inner wall surface of the pick groove within the center line of the pick groove. The upper teeth and lower teeth are both straight teeth.

[0012] The control and adjustment pick assembly is located in the pick groove, and the control and adjustment pick assembly mainly includes a cylindrical spur gear, a main power device, an auxiliary power device, a control circuit board, a rolling gear bearing, a vertical pressure sensor, a horizontal pressure sensor, a pick and a base.

[0013] The base is a cavity stepped shaft, the cylindrical spur gear is located at the upper part of the base, the cylindrical spur gear is meshed with the teeth on the pick groove, the cylindrical spur gear is connected to the auxiliary power device through a key, the auxiliary power device is located at the upper part of the base cavity, the auxiliary power device is connected to the control circuit board through a line, the control circuit board is located at the lower part of the auxiliary power device, the control circuit board is also connected to the main power device through a line, the main power device is located below the control circuit board, the main power device is connected to the pick, the pick Located at the lowermost end of the base, the shank of the pick is in contact with the vertical pressure sensor and the horizontal pressure sensor respectively, and the vertical pressure sensor and the horizontal pressure sensor are respectively connected to the control circuit board through lines, the rolling gear bearing is located in the middle of the base, the rolling gear bearing is interference fit with the base, the outer ring surface of the rolling gear bearing is distributed with latching teeth, the rolling gear bearing is meshed with the outer teeth under the pick groove, and the tooth top circle radius of the cylindrical spur gear is larger than the tooth top circle radius of the outer ring latching teeth of the rolling gear bearing.

[0014] The main power device includes a driving motor, a coupling, a rolling bearing, a transmission shaft, a slide groove and a transmission plate.

[0015] The auxiliary power device comprises a driving motor, a coupling, a transmission shaft, a rolling bearing and a key.

[0016] The control circuit board mainly includes two input ports, three output ports and a chip. The two input ports are respectively connected to the horizontal pressure sensor and the vertical pressure sensor, and the three output ports are respectively connected to the main power unit, the auxiliary power unit and the main control console.

[0017] The rolling gear bearing has a circle of teeth distributed on the outer ring surface of the rolling bearing.

[0018] The control and adjustment pick assembly is installed into the pick of the pick disc from the top.

[0019] At least twelve control and adjustment pick assemblies are evenly distributed on the pick disc.

[0020] The pick barrel drill with automatic adjustment of the pick height provided by the present invention has the following advantages over the prior art: firstly, the entire device of the present invention can be separated into a cylindrical barrel and two parts, the upper and lower parts of the pick disc, by controlling the split assembly, so that the control and adjustment pick assembly can be taken out from the pick groove on the pick disc, which is convenient for the replacement of the pick. Compared with the existing equipment, the present invention can not only complete the replacement of the pick in a short time when the pick fails, but also effectively avoid the damage to the mechanical equipment caused by welding; secondly, the present invention adopts a real-time monitoring structural design to improve the excavation efficiency and the service life of the pick. In fact, although the positions of different picks may only differ by a few millimeters in many cases, the position difference of a few millimeters can completely cause one pick to be severely worn, while the other picks have no substantial excavation at all. This requires ensuring that each pick can be in the same working plane at all times and effectively excavate together, which can be achieved by adjusting the pressure on different picks. The load on each pick is detected in real time by the pressure sensor in the technical solution of the present invention, and the detection data can be comprehensively analyzed. The height of the pick is controlled and adjusted within the centimeter range to balance the load by using the design of the threaded transmission structure based on the comprehensive analysis results, so that all picks can maintain the same level of contact with the excavated ground at any time, avoiding the phenomenon that only a few picks work inefficiently while most of the other picks are not in contact with the excavated ground at all; finally, the present invention is also specially designed to reduce the damage caused by the sudden collision of the pick with hard stones during work, and the control and adjustment of the pick assembly and the pick groove, when the impact of hard stones suddenly reaches the set value, the control and adjustment of the pick assembly reduces the damage to the pick by retreating along the pick groove, and at the same time adjusts the pick height to reduce the torque to reduce the risk of bending and failure of the tooth body, thereby extending the working time of the pick and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the cylindrical structure viewed from above.

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of a cylindrical tube along the axis.

[0024] Figure 4It is a schematic diagram of the top view of the structure of the pick disc.

[0025] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the pick disc.

[0026] Figure 6 It is a schematic diagram of the local structural cross-section that controls the split components.

[0027] Figure 7 It is a structural schematic diagram of the control and adjustment pick assembly.

[0028] Figure 8 It is a schematic diagram of the structure inside the matrix cavity.

[0029] Fig. 9 This is a schematic diagram of the structure of the meshing of the pick groove and the cylindrical spur gear.

[0030] Fig.10 It is a schematic diagram of the structure of the meshing of the pick groove and the rolling gear bearing. DETAILED DESCRIPTION

[0031] See also Figures 1 to 5 , a pick barrel drill with automatically adjustable pick height is mainly composed of a cylindrical barrel 1 and a pick disc 2, and its main technical scheme is: it includes a cylindrical barrel 1, a pick disc 2, a control splitting component 3, and a control and adjustment pick assembly 4, characterized in that the cylindrical barrel 1 and the pick disc 2 are matched and connected up and down, the cylindrical barrel 1 is located at the upper part of the pick disc 2, the cylindrical barrel 1 is a hollow cylinder, the radius of the lower inner wall of the cylindrical barrel 1 is greater than the radius of the upper inner wall of the cylindrical barrel 1, the lower inner wall of the cylindrical barrel 1 is distributed with strip-shaped protrusions 11, the strip-shaped protrusions 11 distributed on the lower inner wall of the cylindrical barrel 1 extend all the way to the lower end surface of the cylindrical barrel 1, the lower outer wall surface of the cylindrical barrel 1 is distributed with circular holes 12, the circular holes 12 penetrate the inner and outer wall of the cylindrical barrel 1, the control splitting component 3 is located in the circular hole 12, and the pick disc 2 is A hollow stepped disc, wherein the radius of the upper outer wall of the pick disc 2 is smaller than the radius of the lower outer wall of the pick disc 2, and strip grooves 22 are distributed on the upper outer wall of the pick disc 2, and the strip grooves 22 extend downward from the upper part of the pick disc 2, and the strip grooves 22 are the same shape and length as the strip protrusions 11, and the strip grooves 22 and the strip protrusions 11 correspond to each other, and the radius of the upper outer wall of the pick disc 2 is equal to the radius of the lower inner wall of the cylindrical barrel 2, the radius of the lower outer wall of the pick disc 2 is equal to the radius of the outer wall of the cylindrical barrel 1, and the radius of the inner wall of the pick disc 2 is equal to the radius of the upper inner wall of the cylindrical barrel 1, and the pick grooves 21 are evenly distributed on the upper and lower transition sections of the pick disc 2, and the control and adjustment pick assembly 4 is located in the pick grooves 21, and the cylindrical barrel 1 and the pick disc 2 are controlled and split by the control splitting device 3.

[0032] See also Figure 6The control splitting component 3 includes a cylindrical pin 31, a pin tongue 32, an elastic element 33, a middle spring tongue 34, and a top spring tongue 35. The middle spring tongue 34 and the top spring tongue 35 are both composed of a spring and a tongue. The middle spring tongue 34 includes a spring tongue located at the upper part of the cylindrical pin 31 and a spring tongue located at the lower part. When the cylindrical barrel 1 is installed in cooperation with the pick disc 2, first, the strip-shaped protrusion 11 on the lower inner wall of the cylindrical barrel 1 is completely matched with the strip-shaped groove 22 on the upper outer wall of the pick disc 2. Under the action of gravity, the cylindrical barrel 1 is tightly nested on the pick disc 2, and then the cylindrical pin 31 is pressed to move in the direction of force. When the top of the cylindrical pin 31 contacts the outer wall of the upper end of the pick disc 2, the middle spring tongue 34, under the action of the elastic force, respectively bounces the tongue into the cylindrical pin 31 from the upper and lower parts of the cylindrical pin 31, and the pin tongue 32 The spring tongue 35 is in contact with the tooth disc 2 and is in a compressed state; when the cylindrical cylinder 1 is separated from the tooth disc 2, the pin tongue 32 is first pressed to make it move in the direction of force, and the pin tongue 32 continues to move after contacting the middle spring tongue 34 at the top, until the pin tongue 32 moves against the middle spring tongue 34 for a distance, and then the tongue of the middle spring tongue 34 leaves the cylindrical pin 31. At this time, the cylindrical pin 31 moves outward under the elastic force of the top spring tongue 35, and then the cylindrical cylinder 1 and the tooth disc 2 are separated up and down along the meshing direction of the strip groove and the strip protrusion through the action of external force, thereby completing the separation of the cylindrical cylinder 1 and the tooth disc 2, and the middle spring tongue 34 is in a compressed state.

[0033] See also Fig. 9 and Fig.10 The center line of the pick groove 21 is an arc line with different radii, and the center line of the pick groove 21 is concentric with the pick disc 2.

[0034] The inner wall of the pick groove 21 is an arc surface, and upper teeth 211 and lower teeth 212 are distributed on the inner wall surface of the pick groove 21 at different depths. The upper teeth 211 are evenly distributed on the inner wall surface outside the center line of the pick groove, and the lower teeth 212 are evenly distributed on the inner wall surface within the center line of the pick groove. The upper teeth 211 and the lower teeth 212 are both straight teeth.

[0035] See also Figure 7 The control and adjustment pick assembly includes a cylindrical spur gear 42, an auxiliary power device 43, a control circuit board 44, a rolling gear bearing 45, a main power device 46, a pressure sensor 47, a pick 48 and a base 41.

[0036] The outer ring surface of the rolling gear bearing 45 is distributed with latching teeth. The rolling gear bearing 45 is externally meshed with the lower teeth 212 of the pick groove 21, and the cylindrical spur gear 42 is internally meshed with the upper teeth 211 of the pick groove 21. The tooth top circle radius of the cylindrical spur gear 42 is larger than the tooth top circle radius of the outer ring latching teeth of the rolling gear bearing 45.

[0037] The base 41 is a hollow stepped shaft, the cylindrical spur gear 42 is connected to the auxiliary power device 43, the auxiliary power device 43 is fixed on the top of the inner cavity of the base 41, the control circuit board 44 is located at the lower part of the auxiliary power device 43 and connected to the auxiliary power device 43, the main power device 46 is located at the lower part of the control circuit board 44 and connected to the control circuit board 44, the pressure sensor 47 is distributed in the lower cavity of the base 41, the cutting tooth 48 is located at the bottom of the base 41, and the shank of the cutting tooth 48 is in contact with the pressure sensor 47.

[0038] The rolling gear bearing 45 is located in the middle of the base body 41 and is interference fit therewith.

[0039] See also Figure 8 The main power device 46 includes a driving motor 461, a coupling 462, a rolling bearing 463, a transmission shaft 464, a slide groove 465 and a transmission plate 466. The driving motor 461 is connected to the transmission shaft 464 through the coupling 462. The rolling bearing 463 fixes the transmission shaft 464 for stable transmission. The transmission shaft 464 and the transmission plate 466 are threadedly connected, and the transmission plate 466 can only slide up and down along the slide groove 465.

[0040] The auxiliary power device includes a driving motor 431, a coupling 432, a rolling bearing 433, a transmission shaft 434 and a key 435. The driving motor 431 is connected to the transmission shaft 434 through the coupling 432. The rolling bearing 433 fixes the transmission shaft 434 for stable transmission. The transmission shaft 434 is connected to the cylindrical spur gear 432 through the key 435. The cylindrical spur gear 432 can rotate clockwise and counterclockwise with the transmission shaft 434.

[0041] The control circuit board 44 is a micro circuit board, which may be equipped with a battery or connected to a ground power source via a wire along the outer wall of the drill tube.

[0042] The pressure sensor 47 is divided into a horizontal pressure sensor 471 and a vertical pressure sensor 472. The horizontal pressure sensor 471 is distributed on the side surface of the inner cavity of the base 41, and the vertical pressure sensor 472 is distributed on the lower end surface of the transmission disk 466. The pick 48 is located in the lower inner cavity of the base 41, and the handle of the pick 48 is in contact with the horizontal pressure sensor 471, and the top of the pick 48 is in contact with the vertical pressure sensor 472.

[0043] The horizontal pressure sensor 471 detects the load borne by the pick 48 in the horizontal direction, and the vertical pressure sensor 472 detects the load borne by the pick 48 in the vertical direction.

[0044] The recognition time of the control circuit board 44 is 5 seconds, that is, the detection data must meet the load condition for more than 5 seconds before the control circuit board 44 can send out a status signal.

[0045] Before the drill starts construction, all the pick 48 heads will be adjusted to the same horizontal plane under the action of gravity. The protruding length of the pick 48 heads is determined according to the strength of the pick 48 selected and the working environment, thereby ensuring that all the picks 48 can work stably for a long time.

[0046] When the barrel drill starts construction, the control and adjustment pick assembly 4 can collect data through the pressure sensor 47 and transmit it to the control circuit board 44. The control circuit board 44 transmits the load data to the main control console. The main control console analyzes the working condition of the pick 48 according to the load data, determines the difficulty of the construction environment, and selects the pick of the corresponding strength grade according to the difficulty of the construction environment for more effective excavation work.

[0047] During the construction of the barrel drill, the control and adjustment pick assembly 4 can collect the force conditions of each pick 48 through the vertical pressure sensor 472 and transmit them to the control circuit board 44 respectively. The control circuit board 44 transmits the load data to the main control console. The main control console comprehensively calculates the mean square error value of the load on each pick 48 and compares it with the minimum mean square error limit (the mean square error value is a vector, and the adjustment direction and height of the pick 48 can be determined by the direction and size of the mean square error value. The minimum mean square error limit is a parameter and can be adjusted according to the specific construction environment.) To determine whether each pick 48 is Whether to adjust and the height of the adjustment are finally transmitted to the control circuit board 44 by the main control console in the form of electrical signals. After processing by the control circuit board 44, two state signals of rising and falling are sent to the main power device 46. The adjustment height of the pick 48 is further determined by the strength of the signal, so as to ensure that all the picks 48 are evenly stressed and located on the same horizontal plane to participate in the excavation work as much as possible, reduce the preferential wear of a few picks 48, and avoid inefficient excavation of individual picks 48, ultimately extending the service life of the picks 48, reducing the replacement frequency of the picks 48, and improving work efficiency.

[0048] The main power device 46 starts to operate immediately after receiving the signal from the control circuit board 44. When a signal is received for adjusting the pick 48 to rise, the drive motor 461 provides power to rotate the transmission shaft 464 counterclockwise, and the transmission plate 466 slides upward along the slide groove 465 through the threaded transmission structure. When the pick 48 moves up to the position specified by the signal under the squeezing of mud and stone, the drive motor 461 stops providing power and self-locks, and the transmission shaft 464 stops rotating, so that all the picks 48 are fixed on the same horizontal plane and participate in the excavation work together; when a signal is received for adjusting the pick 48 to fall, the drive motor 461 provides power to rotate the transmission shaft 464 clockwise, and the transmission plate 466 slides downward along the slide groove 465 through the threaded transmission structure. When the pick 48 moves down to the position specified by the signal under the squeezing of the transmission plate 466, the drive motor 461 stops providing power and self-locks, and the transmission shaft 464 stops rotating, so that all the picks 48 are fixed on the same horizontal plane and participate in the excavation work together.

[0049] During the barrel drilling construction process, the control circuit board 44 can send out three state signals of normal, overload and overload according to the load data detected by the horizontal pressure sensor 471. The normal signal indicates that the horizontal load borne by the detected pick 48 is lower than 80% of the load sufficient to destroy the pick 48. At this time, the main control console will indicate it by displaying a green signal light. The overload signal indicates that the horizontal load borne by the detected pick 48 reaches 80%~100% of the load sufficient to destroy the pick 48. At this time, the main control console will indicate it by displaying a yellow signal light. The overload signal indicates that the horizontal load borne by the detected pick 48 exceeds the load sufficient to destroy the pick 48. At this time, the main control console will indicate it by displaying a red signal light.

[0050] The control circuit board 44 can also trigger the emergency response of retreating and buffering along the pick groove 21 to reduce the damage of the pick 48 according to the three state signals of normal, overload and overload. The main purpose is to reduce the damage of the pick 48 when it suddenly encounters hard stones and the impact load reaches overload and overload during the working process. During the construction of the barrel drill, the motor 431 is first driven to provide pre-load power, and a pre-load is given to the cylindrical spur gear 42 through the transmission shaft 434 to ensure that the control and adjustment of the pick assembly 4 is fixed at the initial position at the right end of the pick groove 21. The pre-load is a parameter. The size of the preload can be set according to the strength of the pick 48 used. Under normal circumstances, the preload is set to 80% of the load sufficient to destroy the corresponding pick 48. When the pick 48 is suddenly impacted by a hard stone during operation and the impact load reaches an overload, the control and adjustment pick assembly 4 will retreat counterclockwise along the pick groove 21, and the horizontal pressure sensor 471 will transmit the detected overload data to the control circuit board 44. The chip in the control circuit board 44 will compare the received overload data with the overload range in the loaded program. After the overload is determined, the control circuit board 44 will generate an overload electrical signal and transmit it to the auxiliary power device 43 and the main power device 46. After receiving the electrical signal, the main power device 46 will adjust the height of the pick so as to reduce the torque on the corresponding pick 48. After the auxiliary power device 43 receives the overload electrical signal, the preload will increase as the control and adjustment pick assembly 4 rolls to the left along the pick groove 21. Although the wear of the pick 48 due to overload is more serious than that due to normal load, the buffering of the control and adjustment pick assembly 4 can effectively reduce the bending of the tooth body and the failure of the pick 48 risk, when the control adjustment pick assembly 4 rolls from the right end of the pick groove 21 to the left end, the horizontal load on the corresponding pick 48 is about to reach an overload state, and at the same time, the horizontal pressure sensor 471 transmits the detected data to the control circuit board 44. The chip in the control circuit board 44 will determine whether the received data reaches the overload lower limit. After determining that all the picks 48 continue to be overloaded in the next 5 cycles, the control circuit board 44 will send an emergency stop signal to the main control console, and the equipment will stop working immediately, thereby avoiding the bending of the tooth body of the pick 48 and failure.

[0051] During the barrel drilling construction process, the main control console controls the pick assembly 4 to make multiple adjustments to the pick 48 that is subjected to abnormal load. If the detection data of the pick 48 is still abnormal, it indicates that the pick 48 at the corresponding position has failed. At this time, the main control console will prompt that the pick 48 at the corresponding position has failed.

[0052] When the main control console determines that a certain pick 48 has failed and replaces the pick 48, the corresponding control and adjustment pick assembly 4 is first removed from the pick groove 21. At this time, the pre-clamping load of the pressure sensor 47 on the pick 48 is almost zero. Therefore, it is very convenient to remove the failed pick 48 from the lower part of the control and adjustment pick assembly 4, and then replace it with a non-failed pick 48 from the lower part. Finally, the control and adjustment pick assembly 4 is re-installed into the pick groove 21. At this time, the pressure sensor 47 will apply a pre-clamping load to the pick 48 to prevent the pick 48 from falling off, thereby completing the replacement of the pick 48.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pick drill with automatically adjustable pick height, characterized in that: The barrel drill comprises a cylindrical barrel, a toothed disc, a control splitting assembly, and a control and adjustment toothed disc assembly, wherein the cylindrical barrel is connected to the toothed disc in a cooperative manner up and down, and the cylindrical barrel and the toothed disc are controlled and split by the control splitting assembly; the cylindrical barrel is located at the upper part of the toothed disc, the cylindrical barrel is a hollow cylinder, the radius of the inner wall of the lower part of the cylindrical barrel is larger than the radius of the inner wall of the upper part of the cylindrical barrel, and strip-shaped protrusions are distributed on the lower inner wall of the cylindrical barrel, and the toothed disc is a hollow stepped disc, the radius of the upper outer wall of the toothed disc is smaller than the radius of the lower outer wall of the toothed disc, and strip grooves are distributed on the upper outer wall of the toothed disc, and the strip grooves and the strip protrusions of the cylindrical barrel are correspondingly matched, and tooth grooves are evenly distributed on the upper and lower transition sections of the toothed disc; the control splitting assembly is located in the cylindrical barrel; the control and adjustment toothed disc assembly is located in the toothed disc groove; the control and adjustment toothed disc assembly is mainly It includes a cylindrical spur gear, a main power unit, an auxiliary power unit, a control circuit board, a rolling gear bearing, a pressure sensor, a pick and a base; the base is a cavity stepped shaft, the cylindrical spur gear is connected to the auxiliary power unit, the auxiliary power unit is fixed on the top of the inner cavity of the base, the control circuit board is located at the lower part of the auxiliary power unit and connected to the auxiliary power unit, the main power unit is located at the lower part of the control circuit board and connected to the control circuit board, the pressure sensor is distributed in the lower cavity of the base, and the pick is located at the bottom of the base; the pressure sensor is divided into a horizontal pressure sensor and a vertical pressure sensor, the pick handle is in contact with the horizontal pressure sensor, and the top of the pick is in contact with the vertical pressure sensor, and the load on each pick is detected in real time by the pressure sensor to control and adjust the height of the pick.

2. A pick drill with automatically adjustable pick height as claimed in claim 1, characterized in that: The control splitting component mainly comprises a cylindrical pin, a pin tongue, an elastic element and a spring tongue.

3. A pick drill with automatically adjustable pick height as claimed in claim 1, characterized in that: The center line of the pick groove is an arc line with different radii, and the center line of the pick groove is concentric with the pick disc.

4. A pick drill with automatically adjustable pick height as claimed in claim 3, characterized in that: The inner wall of the pick groove is an arc surface, and upper teeth and lower teeth are distributed on the inner wall surface of the pick groove at different depths. The upper teeth are evenly distributed on the inner wall surface of the pick groove outside the center line of the pick groove, and the lower teeth are evenly distributed on the inner wall surface of the pick groove within the center line of the pick groove. The upper teeth and lower teeth are both straight teeth.

5. A pick drill with automatically adjustable pick height as claimed in claim 4, characterized in that: The outer ring surface of the rolling gear bearing is distributed with latching teeth, the rolling gear bearing is meshed with the lower teeth of the pick groove, the meshing of the rolling gear bearing and the lower teeth of the pick groove is external meshing, the cylindrical spur gear is meshed with the upper teeth of the pick groove, the meshing of the cylindrical spur gear and the upper teeth of the pick groove is internal meshing, and the tooth top circle radius of the cylindrical spur gear is larger than the tooth top circle radius of the latching teeth of the outer ring of the rolling gear bearing.

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