CN219864869U

CN219864869U - Milling head of double-wheel stirring drilling machine

Info

Publication number: CN219864869U
Application number: CN202222674970.2U
Authority: CN
Inventors: 龚秀刚; 邓彬; 王汉宝; 段国平; 郁文博; 刘永吉
Original assignee: Shanghai Engineering Machinery Co Ltd
Current assignee: Shanghai Engineering Machinery Co Ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-10-20
Anticipated expiration: 2032-10-11

Abstract

A milling head of a double-wheel stirring drilling machine comprises a milling head upper box, two motors, two reduction boxes, two guniting pipes, an air jet pipe, a motor cooling unit, a variable-frequency driving control system and a monitoring system, wherein the reduction boxes are respectively provided with a group of milling wheels; the motor is fixedly arranged in the left empty bin and the right empty bin of the milling head upper box, and the annular cooling cabins of the motor are communicated with each other; the liquid inlet pipe and the liquid outlet pipe of the motor cooling unit are respectively communicated with two annular cooling cabins to form a circulating cooling loop; the reduction gearbox is fixedly arranged below the milling head upper box, and the output end of the reduction gearbox is fixedly provided with a group of milling discs; the guniting pipe and the air jet pipe penetrate through the upper body of the milling head upper box stirring head; the leading-out cables of the variable frequency drive control system are respectively connected with two motors; and a control cable led out by the monitoring system is respectively connected with the pressure sensor, the rotating speed sensor and the temperature sensor. The utility model adopts the direct drive transmission of the motor, has simple and convenient power transmission path and control mode, ensures the stable and reliable operation of the motor, and brings convenience to maintenance.

Description

Milling head of double-wheel stirring drilling machine

Technical Field

The utility model belongs to the technical field of underground foundation construction, and particularly relates to a milling head of a double-wheel stirring drilling machine.

Background

Along with the rapid development of urban high-rise buildings, bridge construction, rail transit and water conservancy construction, the cement-soil stirring wall technology of the double-wheel milling deep stirring process is used as a novel, efficient and environment-friendly construction technology, is fixedly arranged at the bottom of a multi-section rectangular drill rod and is provided with a construction device, milling discs driven by two waterproof gear boxes are used for milling and cutting surrounding in-situ soil, stirring and mixing in-situ soil and cement paste are promoted, and the cement-soil stirring wall can be widely applied to the fields of building foundation reinforcement, water-stopping building envelope, water conservancy and underground engineering seepage prevention and the like. In the prior art, a double-wheel stirring drilling machine adopts a hydraulically driven milling head, the power transmission path of the double-wheel stirring drilling machine is relatively complex, and the double-wheel stirring drilling machine needs to be provided with a hydraulic pump, hydraulic oil, a plurality of paths of ultra-long hydraulic pipelines and a hydraulic motor. In the hydraulic system with a plurality of hydraulic elements such as a control valve group and the like, as the multi-section unit rectangular drill rod is fixedly arranged above the milling head, the arrangement, the fixation and the pipeline butt joint of the excessive hydraulic pipelines in the inner cavity of the rectangular drill rod are more troublesome, so that the double-wheel stirring drilling machine is difficult to mount, dismount, repair and maintain, and the manufacturing cost of equipment is increased by configuring the hydraulic system. And a plurality of difficulties are caused to the installation, the disassembly and the maintenance of the double-wheel stirring drilling machine. Therefore, the milling head of the existing double-wheel stirring drilling machine needs to be improved in design, the power supply type of the milling head is improved, the assembly, the disassembly and the maintenance are convenient, and the manufacturing cost of the double-wheel stirring drilling machine is reduced.

Disclosure of Invention

The utility model mainly aims to overcome the defects in the prior art, and provides the milling head of the double-wheel stirring drilling machine with direct motor driving and circulating cooling, the larger motor overload capacity ensures the continuous milling capacity of a milling disc, the energy loss in the transmission process is effectively reduced, and the stable and reliable operation of a driving motor is ensured through a circulating cooling system; the reduction of pipelines/cables for power driving is more beneficial to the reasonable arrangement of all parts in the milling head, facilitates the installation, the disassembly and the maintenance of equipment, and effectively reduces the manufacturing cost of the equipment.

The utility model is realized by the following technical scheme:

the milling head of milling mixer includes upper box with two cavities, upper box with upper box cover board, two motors with annular cooling cabins, two speed reducing boxes with milling wheels, two slurry spraying pipes, air spraying pipes, two cooling pipes communicated with the annular cooling cabins of the motors, water pump, liquid inlet pipe, radiator, liquid outlet pipe, motor cooling unit with water storage tank, variable frequency driving control system and monitoring system,

the method is characterized in that:

the milling head upper box is fixedly arranged below the external drill rod assembly, and two reduction boxes are arranged at the lower end part of the milling head upper box in a bilateral symmetry mode; the upper box body of the milling head upper box is a cavity member formed by welding an upper box back plate and an upper box outer contour plate, and the upper box outer contour plate is provided with a box body upper end cover, two side bevel edges, two lower bevel edges and a lower bottom edge; the inner cavity of the upper box body is provided with two cavities which are bilaterally symmetrical and mutually independent; two side inclined edges of the upper box body are respectively provided with a through hole communicated with the left cavity and the right cavity; the upper box cover plate is fixedly arranged on the front surface of the upper box;

the motor is fixedly arranged in the left cavity and the right cavity of the milling head upper box respectively, the annular cooling cabin of the motor is arranged in a mode of covering the shell of the motor, and a cooling cabin communicating pipe is arranged between the two annular cooling cabins; the annular cooling cabin of the left motor is connected with a cooling liquid inlet pipe arranged in the external drill rod assembly above the annular cooling cabin of the right motor through a pipeline, and the annular cooling cabin of the right motor is connected with a cooling liquid outlet pipe arranged in the external drill rod assembly above the annular cooling cabin of the right motor through a pipeline;

the input end of the reduction gearbox respectively penetrates through the through holes of the lower end face of the upper box body and then is connected with the output shaft of the motor, and the upper end face of the reduction gearbox is fixedly arranged with the lower end face of the upper box body; the front end and the rear end of the reduction gearbox are provided with two output ends, each group of milling wheels is provided with two milling wheels, and the two milling wheels are respectively fixedly arranged on the two output ends of each reduction gearbox; the reduction gearbox is provided with an air pressure maintaining channel and a lubricating channel; the air pressure maintaining channel of the reduction gearbox is communicated with the inner cavity of the reduction gearbox through an inner air channel of the reduction gearbox, and the inlet end of the air pressure maintaining channel is connected with an air pressure maintaining pipe; the lubrication channel of the reduction gearbox passes through an oil duct in the reduction gearbox to reach each lubrication part of the two output ends of the reduction gearbox and each group of milling wheels which move relatively, and the inlet end of the lubrication channel is connected to a diversion block arranged at the lower end of the lubrication pipe through a pipeline;

the two slurry spraying pipes and the gas spraying pipe penetrate through the upper box body of the milling head upper box in a straight line arrangement mode, and the nozzle of the two slurry spraying pipes and the gas spraying pipe is arranged in the middle of the lower end face of the upper box body; the upper ends of the guniting pipe and the air jet pipe are connected with a slurry supply pipe and an air supply pipe from the inner cavity of the external drill rod assembly;

the water pump of the motor cooling unit is started and then sucks cooling water from the water storage tank, and then sends the cooling water into the annular cooling tanks of the two motors, and hot water generated by the operation of the two motors is brought back to the radiator from the annular cooling tanks to be cooled and then flows back to the water storage tank;

the variable frequency drive control system is characterized in that two frequency converters respectively lead out cables to pass through an inner cavity of an external drill rod assembly and two cavities of a milling head upper box and then are connected to two motors;

the control cable led out by the monitoring system is a multi-core wire harness, passes through the inner cavity of the external drill rod assembly and enters the milling head upper box to be respectively connected with the pressure sensor, the rotating speed sensor and the temperature sensor.

Compared with the prior art, the utility model has the following beneficial effects:

1. the driving system of the milling head adopts a mode of combining direct driving of a permanent magnet synchronous motor with variable frequency control, a power transmission path and a control mode are simpler and more convenient, meanwhile, the continuous milling capability of the milling disc is ensured by larger motor overload capability, the energy loss in the power transmission process is reduced, and the maximum amplitude reduction exceeds 50%;

2. the motor cooling unit adopts a circulating cooling mode, and is connected with the annular cooling cabins arranged on the two motor shells in series through a cooling system pipeline to carry out circulating cooling on the two driving motors, so that the driving motors are always at normal working temperature;

3. the milling head is directly driven by the motor, so that the number of driving cables and control cables is reduced, the setting and the fixation of an inner cavity pipeline of an external drill rod combination are facilitated, the arrangement and the connection of relevant parts of the milling head are facilitated, greater convenience is brought to the installation, the disassembly and the maintenance of the double-wheel stirring drilling machine, and the equipment purchasing cost is effectively reduced.

Drawings

FIG. 1 is a schematic view of the milling head of the dual wheel drilling machine of the present utility model;

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

fig. 4 is a schematic view of the structure of the milling head of the double-wheel stirring drilling machine with the upper box cover plate removed.

Detailed Description

The milling head of the milling mixer according to the utility model is further described below with reference to fig. 1-4.

The milling head of the milling mixer comprises an upper milling head box 401 comprising an upper box body 4010 with two cavities 4011 and 4011', an upper box body cover plate 4018, two motors 408 with annular cooling cabins, two reduction boxes 409 respectively provided with a group of milling wheels 4092, two slurry spraying pipes 402, an air spraying pipe 403, two cooling liquid pipelines respectively communicated with the annular cooling cabins of the motors, a water-containing pump, a liquid inlet pipeline, a radiator, a liquid outlet pipeline, a motor cooling unit of a water storage tank, a variable-frequency driving control system and a monitoring system, wherein:

the milling head upper box 401 is fixedly arranged below the external drill rod assembly, and the lower end part of the milling head upper box is provided with two reduction boxes 409 in a bilateral symmetry mode; the upper box 4010 of the milling head upper box 401 is a cavity component formed by welding an upper box backboard 4016 and an upper box outer contour plate, wherein the upper box outer contour plate is provided with a box upper end cover 4012, two side inclined edges 4013, two lower inclined bottom edges 4014 and a lower bottom edge 4015; the upper box body outer contour plate is formed by bending and welding after being cut by a steel plate, the bottom edge of the upper box body outer contour plate is welded with an upper box body backboard 4016 to form a milling head upper box 401, and a plurality of geometrically symmetrical fastening screw holes are formed in the upper box body outer contour plate; the inner cavity of the upper box 4010 is provided with two cavities 4011 and 4011' which are bilaterally symmetrical and mutually independent, and the inner cavity of the upper box 4010 is realized by arranging a separation plate; the left and right cavities 4011, 4011' are internally provided with mounting seats of two motors 408, and the mounting seats are arranged on the back plate 4016 of the upper box body in an out-splayed manner; two side inclined edges 4013 of the upper box body 4010 are respectively provided with through holes communicated with a left cavity 4011 and a right cavity 4011'; the upper case cover 4018 is fixedly installed on the front surface of the upper case 4010. The upper case cover plate 4018 is cut and formed according to the shape of the upper case outer contour plate, a through hole corresponding to a fastening screw hole of the upper case 4010 is arranged at the edge of the upper case cover plate 4018, a sealing gasket is erected on the joint surface of the upper case cover plate, the upper case cover plate 4018 is covered on the upper case outer contour plate of the upper case 4010, and the upper case is fastened into the milling head upper case 401 through screws.

The motor 408 adopts a permanent magnet synchronous motor, which is respectively and fixedly arranged in the left cavity 4011 and the right cavity 4011' of the milling head upper box 401, the annular cooling cabin of the motor is arranged in a mode of covering the shell of the motor, and a cooling cabin communicating pipe is arranged between the two annular cooling cabins; the annular cooling cabin of each motor 408 is provided with an inlet end and an outlet end, one end of the cooling cabin communicating pipe is connected with the outlet end of the annular cooling cabin of the motor 408 arranged in the left cavity 4011, and the other end of the cooling cabin passes through a partition plate between the two cavities 4011 and 4011' and then is connected with the inlet end of the annular cooling cabin of the motor 408 in the right cavity 4011; the inlet end of the annular cooling cabin 4082 of the left motor 408 is connected with a cooling liquid inlet pipe arranged in the external drill pipe combination above the annular cooling cabin 4082 through a pipeline, and the outlet end of the annular cooling cabin 4082 of the right motor 408 is connected with a cooling liquid outlet pipe arranged in the external drill pipe combination above the annular cooling cabin 4082 through a pipeline, so that the serial connection between the annular cooling cabins of the two motors 408 is realized.

The input end of the reduction gearbox 409 passes through the through holes of the lower end face of the upper box 4010 and then is connected with the output shaft of the motor 408, and the upper end face of the reduction gearbox 409 is fixedly arranged with the lower end face of the upper box 4010; the reduction gearbox 409 is provided with two output ends at the front and rear ends thereof, each group of milling wheels 4092 is provided with two milling wheels, and the two milling wheels are respectively fixedly arranged on the two output ends of each reduction gearbox 409; the milling wheels 4092 of each group mounted at the output shaft of each reduction gearbox 409 rotate in the same direction or in opposite directions, and simultaneously realize low-speed and high-torque milling cutting on the in-situ soil. The air pressure maintaining channel of the speed reducing box 409 is communicated with the inner cavity of the speed reducing box 409 through an inner air channel of the speed reducing box 409, the inlet end of the air pressure maintaining channel is connected with an air pressure maintaining pipe, and the upper end of the air pressure maintaining pipe is connected with a corresponding air pipe from an external air pressure maintaining system and passing through the inner cavity of the external drill rod assembly; thus, the external high-pressure pumping system injects high-pressure gas into the inner cavities of the two reduction boxes through the air pipe, so that the balance between the inner cavities and the external pressure is ensured, and the invasion of external slurry is avoided. The lubrication channel 4097 of the reduction gearbox 409 passes through an internal oil duct of the reduction gearbox 409 to reach each lubrication part of the two output ends of the reduction gearbox and each group of milling wheels 4092 with relative motion, the inlet end of the lubrication channel is connected to a flow dividing block arranged at the lower end of a lubrication pipe through a pipeline, and the upper end of the lubrication pipe is connected with a lubrication pipe which is from an external lubrication system and passes through an external drill rod combined inner cavity; therefore, the external lubricating pump can regularly pump lubricating grease through the lubricating pipeline, ensure that each kinematic pair of the two reduction boxes is effectively and forcedly lubricated, and prolong the service life of parts.

The two slurry spraying pipes 402 and the gas spraying pipe 403 penetrate through the upper box body 4010 of the milling head upper box 401 in a straight line arrangement mode, and the nozzles of the two slurry spraying pipes are arranged in the middle of the lower end face of the upper box body 4010; the upper ends of the guniting pipe 402 and the air jet pipe 403 are respectively connected with a slurry supply pipe and an air supply pipe from the inner cavity of the external drill rod combination. In the construction process of the double-wheel stirring drilling machine, the milling head continuously cuts the soil body deep underground. And when the two groups of milling wheels reversely rotate to damage soil, the external slurry supply system pumps cement slurry to the bottom of the milling head through the slurry injection pipeline and fully stirs the cement slurry with loose surrounding soil. When the milling wheel is downwards stirred, compressed air is added into the external air supply system through the air injection pipeline, so that the crushing and stirring effects are improved, the original stirred soil body is more uniform, and the reinforcing effect is more optimized.

The liquid inlet pipeline and the liquid outlet pipeline of the motor cooling unit are respectively communicated with a cooling liquid inlet pipe and a cooling liquid outlet pipe which are arranged in an external drill rod combination and then form a series loop with the annular cooling cabins of the two motors 408, after the water pump of the motor cooling unit is started, cooling water is sucked from the water storage tank and then is sent into the annular cooling cabins of the two motors 408, and hot water generated by the operation of the two motors 408 is brought back to the radiator from the annular cooling cabins thereof and flows back to the water storage tank after being cooled; like this, the water pump of motor cooling unit is through the inlet tube in feed liquor pipeline, the outside drilling rod combination and is sent into the cooling water of the annular cooling cabin of two motors 408 and increase, can flow back the heat that the motor operation produced through flowing water fast to the radiator cooling, effectively guarantees motor operation normal, ensures that milling head cuts the soil layer smoothly, further improves the life of double round stirring rig. When the water temperature in the annular cooling compartment of the motor 408 is greater than or equal to 90 ℃, a warning of excessive water temperature is indicated on the display screen. At this time, the flow rate of the cooling water can be increased by manipulating the water amount adjusting valve.

The cables led out by the two frequency converters of the electric drive control system sequentially pass through the inner cavity of the external drill rod assembly and the two cavities 4011 and 4011' of the milling head upper box 401 and are respectively connected to the two motors 408; the control of the variable frequency drive control system can realize the same-direction rotation of the two motors or the independent rotation of one motor, so that the milling wheel can cut soil layers in the same-direction rotation, reversely rotate and cut the soil layers or independently rotate and cut the soil layers, and the variable frequency drive control system is suitable for different strata. To cope with the operation demands of different strata.

The control cable led out by the monitoring system is a multi-core wire harness, passes through the inner cavity of the external drill rod assembly and enters the milling head upper box to be respectively connected with the pressure sensor, the rotating speed sensor and the temperature sensor; the temperature sensor transmits the temperature of the driving motor and the temperature of the gear box, the pressure sensor transmits the pressure of the inner cavity of the gear box, and the rotating speed sensor transmits the rotating speed of the driving motor. The numerical values transmitted by the sensors are displayed on a control panel of the monitoring system, so that operators can pay attention in time, and corresponding control methods and adjustment means are adopted.

The milling head of the double-wheel stirring drilling machine adopts a mode of combining direct drive of the permanent magnet synchronous motor with variable frequency control, so that a power transmission path and a control mode are simpler and more convenient, and the continuous milling capability of a milling disc is ensured by larger motor overload capability; the motor cooling unit adopts a circulating cooling mode, so that the motor is ensured to work stably and reliably, and the milling capacity of the milling disc is effectively improved; the milling head adopting the direct-drive motor mode is convenient for arranging all parts in the milling head parts, brings convenience for the maintenance of equipment, and effectively reduces the manufacturing cost of the equipment.

Various changes and modifications may be made to the utility model without departing from the general inventive concept, and, if the same or equivalent thereto is made, the utility model is also within the scope of the utility model.

Claims

1. The milling head of the double-wheel stirring drilling machine comprises an upper box body (4010) with two cavities (4011, 4011'), an upper box body upper box (401) with an upper box body cover plate (4018), two motors (408) with annular cooling cabins, two reduction boxes (409) with a group of milling wheels (4092), an air pressure maintaining channel and a lubrication channel respectively, two slurry spraying pipes (402), one gas spraying pipe (403), two air pressure maintaining pipes, one lubrication pipe, a water-containing pump, a liquid inlet pipeline, a radiator, a liquid outlet pipeline, a motor cooling unit of a water storage tank, a variable-frequency driving control system and a monitoring system,

the method is characterized in that:

the milling head upper box (401) is fixedly arranged below the external drill rod assembly, and two reduction boxes (409) are arranged at the lower end part of the milling head upper box in a bilateral symmetry mode; the upper box body (4010) of the milling head upper box (401) is a cavity component formed by welding an upper box body backboard (4016) and an upper box body outer contour plate, wherein the upper box body outer contour plate is provided with a box body upper end cover (4012), two side bevel edges (4013), two lower bevel edges (4014) and a lower bottom edge (4015); the two cavities (4011, 4011') of the upper box body (4010) are arranged in a bilateral symmetry and mutually independent manner; two side bevel edges (4013) of the upper box body (4010) are respectively provided with through holes communicated with the left cavity (4011) and the right cavity (4011'); the upper box cover plate (4018) is fixedly arranged on the front surface of the upper box (4010);

the motor (408) is respectively fixedly arranged in the left cavity (4011) and the right cavity (4011') of the milling head upper box (401), the annular cooling cabin of the motor is arranged in a mode of covering the shell of the motor, and a cooling cabin communicating pipe is arranged between the two annular cooling cabins; the annular cooling cabin (4082) of the motor (408) positioned in the left cavity (4011) is connected with a cooling liquid inlet pipe arranged in the external drill rod combination above the annular cooling cabin through a pipeline, and the annular cooling cabin (4082) of the motor (408) positioned in the right cavity (4011') is connected with a cooling liquid outlet pipe arranged in the external drill rod combination above the annular cooling cabin through a pipeline;

the input end of the reduction gearbox (409) respectively penetrates through the through holes of the lower end face of the upper box body (4010) and then is connected with the output shaft of the motor (408), and the upper end face of the reduction gearbox is fixedly arranged with the lower end face of the upper box body (4010); the front end and the rear end of the speed reduction box (409) are provided with two output ends, each group of milling wheels (4092) is provided with two milling wheels, and the two milling wheels are respectively fixedly arranged on the two output ends of each speed reduction box (409); the air pressure maintaining channel of the reduction gearbox (409) is communicated with the inner cavity of the reduction gearbox (409) through the inner air channel of the reduction gearbox, and the inlet end of the air pressure maintaining channel is connected with the air pressure maintaining pipe; the lubrication channel (4097) of the reduction gearbox (409) passes through an internal oil duct of the reduction gearbox (409) to reach each lubrication part of two output ends of the reduction gearbox and each group of milling wheels (4092) which move relatively, and the inlet end of the lubrication channel is connected to a diversion block arranged at the lower end of the lubrication pipe through a pipeline;

the two guniting pipes (402) and the air jet pipe (403) penetrate through an upper box body (4010) of the milling head upper box (401) in a straight line arrangement mode, and nozzles of the two guniting pipes are arranged in the middle of the lower end face of the upper box body (4010); the upper ends of the guniting pipe (402) and the air jet pipe (403) are connected with a slurry supply pipe and an air supply pipe from the inner cavity of the external drill rod assembly;

the liquid inlet pipeline and the liquid outlet pipeline of the motor cooling unit are respectively communicated with a cooling liquid inlet pipe and a cooling liquid outlet pipe in an external drill rod combination and then form a series loop with annular cooling cabins of the two motors (408), after the water pump of the motor cooling unit is started, cooling water is sucked from the water storage tank and then is sent into the annular cooling cabins of the two motors (408), and hot water generated by the operation of the two motors (408) is brought back to the radiator from the annular cooling cabins and flows back to the water storage tank after being cooled;

the variable frequency drive control system is characterized in that two frequency converters respectively lead out cables to pass through an inner cavity of an external drill rod assembly and two cavities (4011, 4011') of a milling head upper box (401) and then are connected to two motors (408);