CN113148779A - External cable follow-up device of power utilization equipment for tunnel excavation - Google Patents
External cable follow-up device of power utilization equipment for tunnel excavation Download PDFInfo
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- CN113148779A CN113148779A CN202110438128.6A CN202110438128A CN113148779A CN 113148779 A CN113148779 A CN 113148779A CN 202110438128 A CN202110438128 A CN 202110438128A CN 113148779 A CN113148779 A CN 113148779A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4481—Arrangements or adaptations for driving the reel or the material
- B65H75/4486—Electric motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
- B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H57/00—Guides for filamentary materials; Supports therefor
- B65H57/14—Pulleys, rollers, or rotary bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H61/00—Applications of devices for metering predetermined lengths of running material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4402—Guiding arrangements to control paying-out and re-storing of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/34—Handled filamentary material electric cords or electric power cables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
Abstract
The invention discloses an external cable follow-up device of an electric power transformation device for excavating tunnels, which relates to the technical field of power supply of the electric power transformation device and comprises a winding and unwinding device and a weight measuring device, wherein the winding and unwinding device comprises a winding drum, a motor and a counter, the motor is used for driving the winding drum to rotate, the winding drum is provided with counting holes, and the counter is used for counting when the counting holes rotate over the position of the counter; the force measuring device comprises a weighing device and a bearing roller, and the bearing roller is rotatably arranged at the top of the weighing device; a cable is wound on the winding drum, and one end of the cable, which is close to the end connected with the electric power transformation equipment, is erected on the bearing roller; the weighing device is used for detecting the downward pressure applied to the weighing device by the bearing roller and the power transmission section; the weighing device, the counter and the motor are all electrically connected with the controller. The device is mainly used for automatically winding and unwinding the external cable of the electric power conversion equipment along with the reciprocating movement of the equipment when a drilling and blasting method is used for excavating a tunnel to generate slag, so that the electric shock accident caused by the fact that the cable is dragged to be damaged or the cable is wound into a chassis is avoided.
Description
Technical Field
The invention relates to the field of power supply of electric power transformation equipment, in particular to an external cable follow-up device of electric power transformation equipment for tunnel excavation.
Background
The construction method is influenced by complex terrain conditions and severe natural environments, a large number of tunnels are inevitably required to be constructed when high-altitude railways and highways are constructed, and the construction difficulty is extremely high because the high-altitude railways and the highways are influenced by special construction conditions such as high ground stress, obvious terrain altitude difference, rapid climate difference, complex geological conditions, fragile ecological environments and the like. In the prior art, a tunnel is usually excavated by adopting a drilling and blasting construction mode, and in a high-altitude environment, internal combustion engine equipment is easy to cause rapid reduction of equipment power and increase of oil consumption due to insufficient fuel combustion, and toxic and harmful substances in tail gas discharged by the equipment are greatly increased, so that the whole construction operation efficiency, quality and operation safety of the tunnel are greatly influenced.
Based on the technical scheme, a feasible scheme is that equipment such as an internal combustion excavator, a loader and the like which are commonly used in the traditional drilling and blasting method construction is electrically modified, and the problems encountered in the internal combustion engine equipment construction can be effectively solved by utilizing full-electric equipment construction, so that the overall construction efficiency is improved, the construction energy consumption is reduced, and the quality of the operation environment in the tunnel is improved.
When the internal combustion excavator, the loader and the like are electrically modified, the internal combustion excavator, the loader and the like are affected by serious reduction of the charge and discharge performance of a battery in a severe cold area, and modification is mostly carried out by adopting a mode of externally connecting a cable. Because the equipment such as loader in the tunnel and dig machine is usually frequent reciprocating motion when the operation, when carrying out the electric power ization repacking to it, how to realize the reliable follow-up of cable conductor to avoid the cable conductor to drag wearing and tearing or be drawn into the emergence of leading to the accident in the equipment chassis on ground then is very important.
Disclosure of Invention
The invention aims to provide an external cable follow-up device of electric modification equipment for tunnel excavation, which is mainly used for automatically winding and unwinding external cables of equipment such as an electric modification loader or an excavator along with the reciprocating movement of the equipment when a drilling and blasting method is used for tunnel excavation and mucking, so that the occurrence of electric shock accidents caused by the fact that the cable is dragged on the tunnel pavement to cause the damage of a cable insulating layer or the cable is wound into a loader or an excavator chassis is avoided.
The purpose of the invention is realized by the following technical scheme:
an external cable follow-up device of electric power-to-power equipment for tunnel excavation comprises a coiling and uncoiling device, a weight measuring device and a cable,
the winding and unwinding device comprises a winding drum, a motor and a counter, wherein the motor is used for driving the winding drum to rotate, a counting hole is formed in one end of the winding drum, which deviates from the circle center of the winding drum, the counter is matched with the counting hole, and the counter is used for counting when the counting hole rotates past the position of the counter;
the force measuring device comprises a weighing device and a bearing roller, and the bearing roller is rotatably arranged at the top of the weighing device;
the cable comprises a power transmission section, a spiral section and a power receiving section which are sequentially connected, the spiral section is wound on the winding drum, one end of the power receiving section, which is far away from the spiral section, is used for being connected with an external power supply, one end of the power transmission section, which is far away from the spiral section, is used for being connected with power transformation equipment, and the power transmission section is erected on the bearing roller; the weighing device is used for detecting the downward pressure exerted on the weighing device by the bearing roller and the power transmission section;
still include the controller, weighing device, counter and motor all with the controller electricity is connected.
The winding and unwinding device further comprises a wire storage box, wherein a plurality of pulleys A arranged in a linear shape are fixedly arranged in the wire storage box, a sliding plate is slidably arranged in the wire storage box, a plurality of pulleys B arranged in a linear shape are fixedly arranged on one side of the sliding plate, the pulleys A and the pulleys B are arranged oppositely, and the sliding plate can drive the pulleys B to move close to or far away from the pulleys A;
store up the line case and be close to through wires hole A has been seted up to one side of reel, through wires hole B has been seted up to the opposite side of storing up the line case, the electrified section is kept away from the one end of reel passes through wires hole A and pass around in turn by behind pulley A and the pulley B through wires hole B wears out, the electrified section can freely slide in the through wires hole A, the electrified section in through wires hole B department with store up line case fixed connection, the electrified section is kept away from the one end connection of reel has the plug.
Furthermore, the winding and unwinding device also comprises a drive plate, a rack, a belt wheel A, a belt wheel B and a belt,
the rack is slidably arranged in the wire storage box, the rack is fixedly connected with the sliding plate, the circumference of the drive plate is provided with a shift tooth, the shift tooth is matched with the rack, the belt wheel A is fixedly connected with the drive plate in a coaxial mode, the belt wheel B is fixedly connected with the winding drum in a coaxial mode, and the belt wheel A and the belt wheel B are connected in a belt transmission mode.
Further, still include the second counter, the second counter is used for counting the gliding number of teeth of rack, the second counter with the controller electricity is connected.
Furthermore, the weighing device comprises a cylinder barrel, a piston rod and a pressure gauge, wherein the piston is arranged in the cylinder barrel in a vertically sliding manner, one end of the piston rod is fixedly connected with the piston, the other end of the piston rod extends out of the top end of the cylinder barrel and is rotatably connected with the bearing roller, a pressure cavity is formed between one side of the piston, which is far away from the piston rod, and the bottom of the cylinder barrel, and the pressure gauge is communicated with the pressure cavity.
Further, still include the guide roll, the guide roll set up in between coiling and uncoiling device and the weight-measuring device, the guide roll is used for right the received section direction makes the received section is set up on bearing roller.
The cable access device comprises a mounting seat, a spring, a fixed frame and a sliding frame, wherein the fixed frame is fixedly connected with the mounting seat, the sliding frame is slidably arranged on the mounting seat, one end of the spring is fixedly connected with the fixed frame, and the other end of the spring is fixedly connected with the sliding frame;
the one end of spiral section is kept away from to the section of sending electricity with mount fixed connection, the carriage set up in the mount is close to one side of rolling up and down the coiling mechanism, the section of sending electricity with carriage fixed connection, the cable between carriage and the mount is lax form.
Furthermore, the cable access device also comprises a guide wheel, a wheel seat and an installation column, wherein one end of the installation column is fixedly connected with the installation seat, the other end of the installation column is rotatably connected with the wheel seat, the wheel seat is rotatably provided with the guide wheel, and the rotation axis of the wheel seat is perpendicular to the rotation axis of the guide wheel;
the guide wheel set up in the carriage is kept away from one side of mount, the power transmission section set up in on the wheel face of guide wheel.
The invention has the beneficial effects that:
this dig tunnel power consumption changes equipment external cable follow-up device sets up the length that the counter real-time detection reel received and releases the line, set up the weight of the cable on the weighing device real-time measurement, set up the controller and receive above-mentioned length and weight information and carry out automatic control and realize the cable follow-up, can ensure that the cable part between the electric change equipment such as the excavator loader that bears the weight of roller and the electric power ization transformation keeps the unsettled state in specific range all the time, avoid on the one hand the cable to be pulled out by the tension, on the other hand avoid the cable excessively lax to cause and pull wearing and tearing or be drawn into the chassis damage of electric change equipment on ground.
The weighing device with the cylinder piston structure is used for measuring the weight of the cable on the weighing device in real time, so that the situation that the accurate measurement of the pressure value is influenced due to different positions of the cable erected on the weighing device is avoided; the end part of the bearing roller and the end part of the piston rod can be rotatably connected, so that the bearing roller can be timely rotated when the electric power transformation equipment needs to turn to walk, the stress direction is adjusted, and the pressure value is prevented from being influenced by the pulling of a cable.
The follow-up device adopts a form that the whole cable with good insulation property directly supplies power, so that the power supply safety is ensured. Cable spiral winding sets up the line case and can adjust its length of accomodating the cable in good time according to the action of reel on the reel, keeps the position of external power end unchangeable on the one hand, and on the other hand can effectively avoid appearing cable winding or cable dragging phenomenon at the receipts in-process of unreeling. The belt transmission mechanism, the rack and the shifting wheel are arranged to realize synchronous transmission of the rotation action of the winding drum and the translation action of the sliding plate, power parts are reduced, and the control process is relatively simple and reliable. Set up the second counter and detect the displacement of rack, can receive and release the length of line with the reel with the storage line case that detects and roll up and put the roll length and carry out the contrast inspection, guarantee equipment moving security and stability.
The cable access device with the sliding buffer structure is arranged, so that a cable entering the electric modification equipment can be effectively buffered, and the situation that the cable is damaged or broken due to impact in the cable winding and unwinding process is prevented. The wheel seat with the guide wheel is arranged at the access end, and the force bearing direction of the wheel seat can be adjusted in time along with the steering of electrical transformation equipment such as an excavator or a loader and the like so as to protect a cable insulation layer at the fixed joint of the access equipment and prevent the situation that the cable is broken or the insulation layer is damaged after being repeatedly twisted and pulled for many times.
Drawings
FIG. 1 is a schematic view of an overall structure of an external cable follow-up device of an electric power transformation device for tunnel excavation according to the present invention;
FIG. 2 is a schematic structural diagram of a coiling and uncoiling device and a weight measuring device in an external cable follow-up device of the electrical transformation equipment for excavating tunnels, which is disclosed by the invention;
FIG. 3 is a schematic structural diagram of a winding and unwinding device in an external cable follow-up device of the electrical transformation equipment for tunnel excavation and a schematic structural diagram of the interior of a wire storage box;
FIG. 4 is a schematic diagram of the backside structure of FIG. 3;
FIG. 5 is a schematic sectional view of a weighing device of the weighing apparatus;
FIG. 6 is a schematic structural view of a cable access device;
FIG. 7 is a schematic view of the stress analysis of the external cable follow-up device of the electrical transformation equipment for tunnel excavation at the position of a bearing roller when in use;
fig. 8 is a schematic overall structure diagram of an external cable follow-up device of an electric power transforming apparatus for tunnel excavation according to another embodiment of the present invention;
fig. 9 is a schematic structural view of the winding and unwinding device and the weight measuring device in the embodiment shown in fig. 8.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 to 7, an external cable following device of an electrical transformation apparatus for tunnel excavation includes a winding and unwinding device 100, a weight measuring device 200, and a cable. The winding and unwinding device 100 includes a winding drum 110, a motor 111 and a counter 113. The motor 111 is used for driving the winding drum 110 to rotate. A counting hole 112 is formed in one end of the winding drum 110 in a position deviating from the circle center of the winding drum, a counter 113 is matched with the counting hole 112, and the counter 113 is used for counting when the counting hole 112 rotates to the position of the counter 113. The force measuring device 200 comprises a weighing device 210 and a bearing roller 220, wherein the bearing roller 220 is rotatably arranged on the top of the weighing device 210. A controller is also provided, and the weighing device 210, the counter 113 and the motor 111 are all electrically connected with the controller.
The device is provided with a counter 113 which can detect and record the rotation number or the rotation angle of the winding drum 110 in real time (a plurality of counting holes 112 are uniformly distributed in the circumference when the angle is detected), and the length of the winding and unwinding line of the winding drum 110 can be calculated by combining the diameter of the winding drum 110; the weighing device 210 may be configured to measure the downward pressure exerted by the carrier roller 220 and the cable above the carrier roller 220 on the weighing device 210 in real time, and the downward pressure exerted by the carrier roller 220 due to its own weight is subtracted from the measured downward pressure to obtain the downward pressure exerted by the cable above the carrier roller 220 on the weighing device 210 alone. The length of the wire wound and unwound by the winding drum 110 and the independent downward pressure value of the cable detected by the weighing device 210 are fed back to the controller, and the controller can control the motor 111 to rotate forward or backward or stop rotating in real time according to the setting, so that the winding or unwinding action is completed, and the automatic follow-up process of the cable is realized.
The automatic control realizes the cable follow-up, can ensure that the cable power transmission section 510 between the bearing roller 220 and the electric reforming machine loader and other equipment is always kept in a suspended state within a specific range, on one hand, the situation that the cable is not unreeled in a stretched state and is not timely dragged by the electric reforming machine or is too fast to be reeled and is damaged by the winding drum 110 is avoided, and on the other hand, the situation that the cable is excessively loosened to cause the ground dragging abrasion or the chassis involved in the electric reforming machine is damaged is avoided.
The middle part of the cable is spirally wound on the winding drum 110, one end of the cable is connected with an external fixed power supply, and the other end of the cable is connected with electrical equipment such as an electrical excavator loader and the like. For convenience of description, the cable is divided into three parts, i.e., a power transmission section 510, a spiral section 520 and a power receiving section 530, which are connected in sequence. Wherein the spiral section 520 refers to a portion of the cable wound on the drum 110, the power receiving section 530 refers to a portion of the cable connected to an external power source, and the power transmitting section 510 refers to a portion of the cable connected to the electrical converter.
When the device is used, the initial positions of the device and the electric power conversion machine or the loader are fixed, the length of the cable is adjusted, the end part of the power receiving section 530 of the cable is connected to an external power supply, the end part of the power transmission section 510 of the cable is connected to the electric power conversion equipment, and the power transmission section 510 is arranged on the bearing roller 220 in an overlapping mode. The initial extension of the powered section 530 of the cable at that time and the initial pressure value detected by the weighing device 210 are recorded.
In use, the downward force exerted by the weight of the cable on carrier roller 220 is shown in FIG. 7, where cable feed section 510 can be broken down into two parts: the gravity of the cable feeding section 510 between the carrier roller 220 and the winding drum 110 is G2, and the gravity of the cable feeding section 510 between the carrier roller 220 and the electrical transformation device is G1. The weighing device 210 detects the downward force F exerted by the load roller 220 and the cable above the load roller on the weighing device 210 in real time.
This detected downforce value F can be decomposed into two parts F1, F2:
F=F1+F2；
wherein F1 is generated by the gravity G1 of a cable feeding section 510 between the carrier roller 220 and the electrical modification apparatus, and according to the force balance analysis,
F1=1/2*G1*cosθ；
where θ is an angle inclined to the vertical direction when the cable power transmission segment 510 hangs down in the air at the carrier roller 220, and θ =90 degrees when the power transmission segment 510 is straightened.
Assuming that the gravity of the cable per unit length is mg, the length of the cable power transmission section 510 between the carrier roller 220 and the electrical transformation device is L1, and the length of the cable power transmission section 510 between the carrier roller 220 and the winding drum 110 is L2, there are
G1=mgL1 ；
G2=mgL2 ；
F2 results from the weight G2 of the length of cable feed segment 510 between the load roller 220 and the drum 110 and the load roller's own weight. Because the relative position between the carrier roller 220 and the winding drum 110 is fixed, when the winding drum 110 is wound or unwound, the length L2 of the power transmission section 510 between the carrier roller 220 and the winding drum 110 is constant, and the downward pressure generated by the power transmission section acting on the carrier roller 220 is constant; meanwhile, the weight of the carrier roller 220 itself is not changed, so that the above-mentioned F2 is constant.
When the winding drum 110 winds and unwinds, the length of a cable power transmission section 510 between the bearing roller 220 and the electrical transformation device changes, the changed length is the same as the length of the cable wound and unwound by the winding drum 110, and is set to be delta L, so that the cable wound and unwound by the winding drum 110 has the length delta L
G1=mg（L1+ΔL）；
Thereby: the detected pressure value F =1/2 mg (L1 + Δ L) cos θ + F2 may be inferred.
Further, can be pushed out
θ=arccos[2（F-F2）/* mg（L1+ΔL）]
In the above formula:
f is the pressure value detected by the weighing device 210;
f2 is a fixed value and can be obtained from an initial state;
mg is a unit length cable gravity value, is determined by the type of the used cable, and is a fixed value;
l1 is obtained from the initial state and is a fixed value;
the Δ L is the same as the length of the cable wound on the drum 110, and can be obtained by detecting and recording the number of turns or the angle of rotation of the drum 110 by the counter 113 and converting the number of turns or the angle of rotation in combination with the diameter of the drum 110.
Therefore, the length Δ L of the cable wound and unwound from the winding drum 110 is adjusted according to the pressure value F detected by the weighing device 210, so that the dynamic regulation and control of the angle θ value inclined to the vertical direction when the cable power transmission section 510 at the bearing roller 220 hangs down in the air can be realized, and the cable power transmission section 510 between the bearing roller 220 and the electrical transformation device is ensured to be always kept in the suspension state within a specific range.
The control range of the above-mentioned theta value may be determined according to the actual excavated tunnel length (or the maximum distance of the reciprocation of the electric modification apparatus), and the height of the carrier roller 220 and the terminals of the electric modification apparatus from the ground.
During control, the set angle range is 60-80 degrees as an example: when the electric modification equipment moves forwards to enable the cable to deviate from the vertical direction by an angle close to 80 degrees (the angle during straightening is 90 degrees), the lower limit value calculated by the controller is reached (the lower limit value of the pressure value of the force detected by the weighing device 210 under the condition of the length of the released cable) at the moment, and the motor 111 drives the winding drum 110 to rotate and pay off, so that the cable is prevented from being stretched and pulled; when the electric modification equipment moves the cable backwards to loosen, the angle of the cable deviated from the vertical direction is reduced, when the lower limit value is 60 degrees, the upper limit value calculated by the controller is reached (the upper limit value of the pressure value of the force detected by the weighing device 210 under the condition of the length of the released cable), and the motor 111 drives the winding drum 110 to rotate reversely to wind up, so that the cable is prevented from being excessively loosened and dragged on the ground. When the cable deviates from the vertical direction and the angle is changed between 60 and 80, the winding drum 110 is not moved at the moment, so that the pressure feedback control is facilitated, and meanwhile, enough buffering allowance is reserved, and the cable is prevented from being pulled apart.
In the prior art, when the cable on the winding drum is used for external power supply, a current-receiving slip ring which is conducted with an external power supply is usually installed on the winding drum, one end of the cable wound on the winding drum is conducted on the current-receiving slip ring in a sliding manner, and the other end of the cable is connected with the electric equipment to be conducted so as to realize power supply. However, such a type of power distribution has a very high requirement for insulation safety, and the slip ring is susceptible to wear of sliding parts and contact failure due to long-term use in a power receiving type. When being used for carrying out the electric power transformation to tunnel excavation equipment, need insert high voltage power supply usually, and the topography condition is complicated, the operational environment is abominable, for guaranteeing operation safety, should not select for use the form of above-mentioned sliding ring power supply.
Therefore, in the present embodiment, the whole cable with good insulation performance is selected to directly supply power. However, since the cable is integrally and spirally wound on the winding drum 110, when the winding drum 110 rotates to unwind the power transmission section 510, the power receiving section 530 is actually a winding process; conversely, when the power transmission section 510 is wound, the power receiving section 530 is actually an unwinding process. This causes the length of the power receiving section 530 between the reel 110 and the external power source to change with the rotation of the reel 110, and when the end of the power receiving section 530 is connected to the external power source, the power receiving section 530 is easily wound or the cable is easily pulled during the length change.
Therefore, as shown in fig. 3 and 4, the winding and unwinding device 100 further includes a storage box 120. A plurality of pulleys A131 arranged in a straight line are fixedly arranged in the wire storage box 120, a sliding plate 130 is slidably arranged in the wire storage box 120, a plurality of pulleys B132 arranged in a straight line are fixedly arranged on one side of the sliding plate 130, the pulleys A131 and the pulleys B132 are arranged oppositely, and the sliding plate 130 can drive the pulleys B132 to move close to or far away from the pulleys A131. One side of the wire storage box 120 close to the winding drum 110 is provided with a wire threading hole A, the other side of the wire storage box 120 is provided with a wire threading hole B, and one end of the current receiving section 530 far away from the winding drum 110 penetrates through the wire threading hole A and penetrates out of the wire threading hole B after alternately bypassing the pulley A131 and the pulley B132. The power receiving section 530 can slide freely in the threading hole a, the power receiving section 530 is fixedly connected with the outlet box 120 at the threading hole B, and the end of the power receiving section 530 far away from the winding drum 110 is connected with a plug 540.
Set up storage box 120 and can accomodate the section 530 that receives in, when unreeling to power transmission section 510, can drive slide 130 through drive arrangement and drive pulley B132 and move to being close to pulley A131 direction, because the distance between pulley B132 and the pulley A131 reduces, the cable section length that storage box 120 was accomodate shortens, storage box 120 unwrapping wire, the cable of giving out can satisfy the rolling needs of the section 530 that receives power. On the contrary, when the power transmission section 510 is wound, the driving device can drive the sliding plate 130 to drive the pulley B132 to move in the direction away from the pulley a131, the distance between the pulley B132 and the pulley a131 is increased, the length of the cable section accommodated in the cable storage box 120 is increased, the cable storage box 120 takes up the cable, and the cable unwound from the power receiving section 530 can be accommodated in the cable storage box 120. The cable storage box 120 is arranged, so that the extra cables in the power receiving section 530 can be stored in the cable storage box under the requirement of keeping the position of the plug 540 fixed, meanwhile, the cable storage box 120 can timely adjust the length of the stored cables according to the action of the winding drum 110, and the phenomenon of cable winding or cable dragging in the winding and unwinding process can be effectively avoided.
The sliding motion of the sliding plate 130 can be driven by various driving devices, and in this embodiment, the winding and unwinding device 100 further includes a dial 140, a rack 150, a pulley a160, a pulley B161, and a belt 163. The rack 150 is slidably arranged in the wire storage box 120, the rack 150 is fixedly connected with the sliding plate 130, the dial teeth 141 are arranged on the circumference of the dial 140, the dial teeth 141 are matched with the rack 150, the belt wheel A160 is coaxially and fixedly connected with the dial 140, the belt wheel B161 is coaxially and fixedly connected with the winding drum 110, and the belt wheel A160 and the belt wheel B161 are in transmission connection through a belt 163.
When the reel 110 is unwound or unwound, it drives the pulley B161 to rotate, and under the action of the belt 163, the pulley a160 rotates together with it, further enabling the dial 140 to rotate, and in the process of continuous rotation of the dial 140, when the dial tooth 141 passes through the rack 150, the rack 150 can be toggled to translate by a pitch. The length of the cable wound and unwound in one circle of rotation of the winding drum 110 can be determined by the diameter of the winding drum, and the length of the wound and unwound cable of the cable storage box 120 can be measured according to the actual measurement when the rack 150 translates by one pitch, so that the pulley A160, the pulley B161 and the dial 140 with proper sizes can be selected, and the automatic wire winding and unwinding process of the cable storage box 120 along with the movement of the winding drum 110 can be realized. In practical implementation, the pulleys a160 and B161 are synchronous pulleys with the same size, and the belt 163 is a synchronous belt, so as to ensure that the speed ratio of the belt transmission mechanism is constant, and when the drum 110 rotates once, the dial 140 rotates once synchronously. Therefore, the number of the dialing teeth 141 on the dial plate 140 (the dialing teeth 141 are circumferentially and uniformly distributed) can be directly determined according to the diameter of the winding drum 110 and the length of the winding and unwinding line of the line storage box 120 when the rack 150 translates by one pitch, so that the line storage box 120 and the winding drum 110 can synchronously follow up, and the dragging abrasion of a cable or the winding condition of the cable is avoided.
Further, a second counter is arranged and installed on the wire storage box 120, the second counter is used for counting the number of teeth of the rack 150, and the second counter is electrically connected with the controller. The number of teeth of the rack 150 can be detected in real time by arranging the second counter, so that the sliding distance of the rack 150 can be calculated, and the length of the wire winding and unwinding of the wire storage box 120 can be further obtained. The second counter is connected with the controller, so that the detected length of the winding and unwinding line of the wire storage box 120 and the detected length of the unwinding line of the winding drum 110 can be compared and checked, and the running safety of the equipment is ensured.
The weighing device 210 may be a pressure sensor, an electronic scale, or other devices, and in this embodiment, as shown in fig. 5, the weighing device 210 includes a cylinder 211, a piston 212, a piston rod 213, and a pressure gauge 214. The piston 212 is slidably disposed in the cylinder 211, one end of the piston rod 213 is fixedly connected to the piston 212, the other end of the piston rod 213 extends out of the top end of the cylinder 211 and is rotatably connected to the carrier roller 220, a pressure chamber is formed between one side of the piston 212 away from the piston rod 213 and the inner wall of the bottom of the cylinder 211, and the pressure gauge 214 is communicated with the pressure chamber. When the cable is laid on the bearing roller 220, the gravity of the cable and the gravity of the bearing roller 220 apply a downward pressure to the piston rod 213, so as to compress the gas in the pressure chamber of the cylinder 211, and the pressure value F can be detected by the pressure gauge 214. The weighing device 210 with the cylinder piston structure can detect the pressure value F in the right-down direction even if the cable is obliquely lapped on the bearing roller 220, and the situation that the accurate measurement of the pressure value F is influenced due to different positions of the cable lapped on the weighing device 210 can be avoided; the end parts of the bearing roller 220 and the piston rod 213 can be rotatably connected, so that the bearing roller 220 can be timely rotated to adjust the stress direction when the electric power transformation equipment needs to turn to walk, and the pressure value F is prevented from being influenced by the pulling of a cable.
In specific implementation, as shown in fig. 8 and 9, the cable spiral section 520 is wound on the winding drum 110 only by one turn, at this time, the winding drum 110 plays a role of a traction disc and a length measuring and counting function, and the cable winding and unwinding is realized by the synchronous movement of the rack 150 driven by the winding drum 110. Through the arrangement, the situation that the cables are wound on the winding drum 110 in multiple layers and the cable storage box 120 cannot achieve equal-length cable winding and unwinding under the driving of the winding drum 110 due to the fact that the lengths of the wound cables in the layers are different can be avoided.
Further, as shown in fig. 2 and 5, in implementation, the external cable follow-up device of the electrical reforming equipment for tunnel excavation further includes a guide roller 400, and the guide roller 400 is disposed between the winding and unwinding device 100 and the weight measuring device 200. In implementation, the lower side of the roller surface of the guide roller 400 is lower than the upper side of the roller surface of the winding drum 110, when the winding drum 110 is wound and unwound, the guide roller 400 can slightly press and guide the cable, and the cable can be orderly wound onto the winding drum 110 in the winding and unwinding process by combining the cable groove on the roller surface of the winding drum 110. The width of the guide roller 400 is smaller than that of the carrying roller 220, and when the winding drum 110 is wound or unwound, the guide roller 400 can guide and limit the cable power receiving section 530, so that the power receiving section 530 is erected within the width range of the carrying roller 220. The height of the upper side of the roller surface of the guide roller 400 is higher than that of the roller surface of the carrier roller 220, so that the cable can be effectively guided by the dead weight of the cable in the unwinding process of the winding drum 110, and the length L2 of the power transmission section 510 between the carrier roller 220 and the winding drum 110 is almost unchanged.
In addition, as shown in fig. 6, the electrical transformation equipment for tunnel excavation is externally connected with a cable follow-up device, and further comprises a cable access device 300. The cable access device 300 includes a mounting seat 310, a spring 340, a fixing frame 320 and a sliding frame 330, wherein the fixing frame 320 is fixedly connected with the mounting seat 310, the sliding frame 330 is slidably disposed on the mounting seat 310, one end of the spring 340 is fixedly connected with the fixing frame 320, and the other end of the spring 340 is fixedly connected with the sliding frame 330. One end of the power transmission section 510, which is far away from the spiral section 520, is fixedly connected with the fixing frame 320, the carriage 330 is disposed on one side of the fixing frame 320, which is close to the winding and unwinding device 100, the power transmission section 510 is fixedly connected with the carriage 330, and a cable between the carriage 330 and the fixing frame 320 is loose. When in use, the cable access device 300 is fixedly installed on electrical equipment such as an electrical engineering excavator, a loader and the like, and the end of the power transmission section 510 is connected with a fixed joint on the electrical engineering equipment to supply power to the electrical engineering equipment. When the electrical transformation equipment reciprocates, the spring 340 and the sliding frame 330 can effectively buffer a cable entering the electrical transformation equipment, so that the situation that the cable is damaged or broken due to impact in the cable winding and unwinding process is prevented.
Further, the cable access device 300 further includes a guiding wheel 350, a wheel seat 352 and a mounting column 351, one end of the mounting column 351 is fixedly connected with the mounting seat 310, the other end of the mounting column 351 is rotatably connected with the wheel seat 352, the guiding wheel 350 is rotatably mounted on the wheel seat 352, and the rotation axis of the wheel seat 352 is perpendicular to the rotation axis of the guiding wheel 350; the guide wheel 350 is disposed on a side of the sliding frame 330 away from the fixed frame 320, and the power transmission segment 510 is disposed on a wheel surface of the guide wheel 350. Through the arrangement, the wheel seat 352 can timely adjust the stress direction along with the steering of electrical equipment such as an excavator or a loader and the like so as to protect the cable insulation layer at the fixed joint of the access equipment and prevent the situation that the cable is broken or the insulation layer is damaged after being repeatedly twisted for many times to receive tensile force.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An external cable follow-up device of an electric power transformation device for tunnel excavation is characterized by comprising a coiling and uncoiling device (100), a weight measuring device (200) and a cable,
the winding and unwinding device (100) comprises a winding drum (110), a motor (111) and a counter (113), wherein the motor (111) is used for driving the winding drum (110) to rotate, a counting hole (112) is formed in one end of the winding drum (110) in a position deviating from the circle center of the winding drum, the counter (113) is matched with the counting hole (112), and the counter (113) is used for counting when the counting hole (112) rotates past the position of the counter (113);
the force measuring device (200) comprises a weighing device (210) and a bearing roller (220), wherein the bearing roller (220) is rotatably arranged at the top of the weighing device (210);
the cable comprises a power transmission section (510), a spiral section (520) and a power receiving section (530) which are sequentially connected, wherein the spiral section (520) is wound on the winding drum (110), one end, far away from the spiral section (520), of the power receiving section (530) is used for being connected with an external power supply, one end, far away from the spiral section (520), of the power transmission section (510) is used for being connected with electrical transformation equipment, and the power transmission section (510) is erected on the bearing roller (220); the weighing device (210) is used for detecting the downward pressure exerted on the weighing device (210) by the bearing roller (220) and the power transmission section (510);
the weighing device further comprises a controller, and the weighing device (210), the counter (113) and the motor (111) are all electrically connected with the controller.
2. The external cable follow-up device of the electric power reforming equipment for excavating tunnels according to claim 1, wherein the winding and unwinding device (100) further comprises a wire storage box (120), a plurality of pulleys A (131) arranged in a straight line are fixedly arranged in the wire storage box (120), a sliding plate (130) is slidably arranged in the wire storage box (120), a plurality of pulleys B (132) arranged in a straight line are fixedly arranged on one side of the sliding plate (130), the pulleys A (131) and the pulleys B (132) are oppositely arranged, and the sliding plate (130) can drive the pulleys B (132) to move close to or far away from the pulleys A (131);
store up line case (120) and be close to one side of reel (110) has seted up through wires hole A, store up the opposite side of line case (120) and seted up through wires hole B, electrified section (530) are kept away from the one end of reel (110) is passed through wires hole A and is walked around in turn by behind pulley A (131) and pulley B (132) through wires hole B wears out, electrified section (530) can freely slide in the through wires hole A, electrified section (530) in through wires hole B department with store up line case (120) fixed connection, the one end connection that electrified section (530) kept away from reel (110) has plug (540).
3. The external cable follow-up device of the electric reforming equipment for excavating tunnels according to claim 2, wherein the winding and unwinding device (100) further comprises a drive plate (140), a rack (150), a pulley A (160), a pulley B (161) and a belt (163),
rack (150) slidable set up in store up in line case (120), rack (150) with slide (130) fixed connection, be provided with on the circumference of driver plate (140) and dial tooth (141), dial tooth (141) with rack (150) looks adaptation, band pulley A (160) with the coaxial fixed connection of driver plate (140), band pulley B (161) with the coaxial fixed connection of reel (110), band pulley A (160) and band pulley B (161) pass through belt (163) transmission connection.
4. The external cable follow-up device of the electrical modification equipment for excavating the tunnel according to claim 3, further comprising a second counter, wherein the second counter is used for counting the number of teeth sliding on the rack (150), and the second counter is electrically connected with the controller.
5. The external cable follow-up device of the electrical modification equipment for excavating tunnels according to claim 1, wherein the weighing device (210) comprises a cylinder (211), a piston (212), a piston rod (213) and a pressure gauge (214), the piston (212) is arranged in the cylinder (211) in a vertically sliding manner, one end of the piston rod (213) is fixedly connected with the piston (212), the other end of the piston rod (213) extends out of the top end of the cylinder (211) and is rotatably connected with the bearing roller (220), a pressure cavity is formed between one side of the piston (212) far away from the piston rod (213) and the bottom of the cylinder (211), and the pressure gauge (214) is communicated with the pressure cavity.
6. The external cable follow-up device of the electric reformation equipment for excavating the tunnel according to claim 1, characterized by further comprising a guide roller (400), wherein the guide roller (400) is arranged between the coiling and uncoiling device (100) and the weight measuring device (200), and the guide roller (400) is used for guiding the power receiving section (530) so that the power receiving section (530) is erected on the bearing roller (220).
7. The external cable follow-up device of the electrical modification equipment for excavating the tunnel according to claim 1, further comprising a cable access device (300), wherein the cable access device (300) comprises a mounting base (310), a spring (340), a fixing frame (320) and a sliding frame (330), the fixing frame (320) is fixedly connected with the mounting base (310), the sliding frame (330) is slidably arranged on the mounting base (310), one end of the spring (340) is fixedly connected with the fixing frame (320), and the other end of the spring (340) is fixedly connected with the sliding frame (330);
the one end of spiral section (520) is kept away from in power transmission section (510) with mount (320) fixed connection, carriage (330) set up in mount (320) are close to one side of rolling up and down device (100), power transmission section (510) with carriage (330) fixed connection, the cable between carriage (330) and mount (320) is lax form.
8. The external cable follow-up device of the electrical modification equipment for excavating the tunnel according to claim 7, wherein the cable access device (300) further comprises a guide wheel (350), a wheel seat (352) and a mounting column (351), one end of the mounting column (351) is fixedly connected with the mounting seat (310), the other end of the mounting column (351) is rotatably connected with the wheel seat (352), the guide wheel (350) is rotatably mounted on the wheel seat (352), and the rotation axis of the wheel seat (352) is perpendicular to the rotation axis of the guide wheel (350);
the guide wheel (350) is arranged on one side, away from the fixed frame (320), of the sliding frame (330), and the power transmission section (510) is erected on the wheel surface of the guide wheel (350).
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| CN202110438128.6A CN113148779B (en) | 2021-04-22 | 2021-04-22 | External cable follow-up device of power utilization of excavation tunnel changes equipment |
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| CN202110438128.6A CN113148779B (en) | 2021-04-22 | 2021-04-22 | External cable follow-up device of power utilization of excavation tunnel changes equipment |
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