CN110380360B - Subway tunnel construction railcar convenient to realize regular cable laying - Google Patents
Subway tunnel construction railcar convenient to realize regular cable laying Download PDFInfo
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- CN110380360B CN110380360B CN201910615342.7A CN201910615342A CN110380360B CN 110380360 B CN110380360 B CN 110380360B CN 201910615342 A CN201910615342 A CN 201910615342A CN 110380360 B CN110380360 B CN 110380360B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 230000000452 restraining effect Effects 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 16
- 230000007246 mechanism Effects 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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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
- B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
- B65H49/18—Methods or apparatus in which packages rotate
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
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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
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
The invention discloses a subway tunnel construction railcar convenient for realizing regular cable laying, which comprises a railcar body, wherein a pay-off arm is arranged on the railcar body, and the railcar body further comprises a cable restraining device arranged on the pay-off arm, wherein the cable restraining device comprises a support, a bracket, a cable guide and a wire binding machine, the support is fixed on the pay-off arm, the bracket is rotatably connected to the support, and the railcar further comprises a locking piece for realizing the fixation of the bracket relative to the support; the cable guide and the wire binding machine are fixedly arranged on the bracket, and the cable output end of the cable guide is connected with the cable input end of the wire binding machine. The structural design of the railway car not only can realize synchronous laying of multi-strand cables, but also can obtain regular cable wiring on the cable support.
Description
Technical Field
The invention relates to the technical field of cable wiring equipment, in particular to a subway tunnel construction railcar convenient for realizing regular cable laying.
Background
In order to ensure normal power supply in the subway, cabling is required in a tunnel in the subway section, and the cables generally extend along the extending direction of the tunnel. In order to improve the wiring efficiency of the cable and reduce the labor intensity of wiring, in the prior art, a rail car capable of moving along a track in a tunnel is generally adopted as a carrier of the cable laying equipment, namely, the rail car releases the cable to a cable bracket through a paying-off device on the rail car in the moving process along the track. A paying-off arm and a wire coil are installed on an existing railway car, a motor drives the wire coil to pay off, and then the paying-off arm is adjusted manually, so that a cable is placed on a cable support.
The existing railway vehicle for cable laying has the following problems in use:
(1) Since the number of the wire coils is generally 3, the weight can reach 8-9 tons. When the wire coil is not matched with the vehicle speed, the cable is too tight or too loose, particularly when the wire coil turns, the paying-off efficiency is very low, and the cable is easy to damage.
(2) The length of the pay-off arm is generally 3 meters, the weight is about 1.5 tons, and the labor intensity is high when the pay-off arm is manually adjusted to adapt to the turning curvature radius of the tunnel through the height and the gesture.
(3) In order to meet the driving requirement of the wire coil, the corresponding driving component is complex in structure and large in size, so that the whole weight of the rail car is large.
The structural design of the railcar for cable laying is further optimized, so that the railcar can be more conveniently applied to subway tunnel construction, and the railcar is a technical problem to be solved urgently by the technicians in the field.
Disclosure of Invention
Aiming at the technical problem that the structural design of the railway vehicle for cable laying is further optimized so that the railway vehicle can be more conveniently applied to subway tunnel construction, the invention provides the subway tunnel construction railway vehicle convenient for realizing regular cable laying. The structural design of the railway car not only can realize synchronous laying of multi-strand cables, but also can obtain regular cable wiring on the cable support.
Aiming at the problems, the subway tunnel construction railcar convenient for realizing regular cable laying solves the problems through the following technical points: the subway tunnel construction railcar convenient to realize regular cable laying comprises a railcar body, wherein a pay-off arm is arranged on the railcar body, and the railcar further comprises a cable restraining device arranged on the pay-off arm, wherein the cable restraining device comprises a support, a cable guide and a wire binding machine, the support is fixed on the pay-off arm, the support is rotatably connected to the support, and the railcar further comprises a locking piece for realizing the fixation of the support relative to the support;
the cable guide and the wire binding machine are fixedly arranged on the bracket, and the cable output end of the cable guide is connected with the cable input end of the wire binding machine.
In the prior art, aiming at subway tunnel construction, the number of cables laid on a cable bracket is generally multiple, at present, a single cable is generally laid on the cable bracket independently, so that the cable laying efficiency is not facilitated, and meanwhile, the cables cannot be regularly fixed on the cable bracket due to the tension difference between the cables.
In this scheme, through setting up to still including cable restraint device, cable restraint device is located the cable drum when specific application and is gone up with the cable transfer route of pay off arm output, and when specific application, stranded cable passes through the cable guide and passes through the mode of cable bundle to the wiring machine transmission, and the wiring machine accomplishes cable bundle bundling back, and the cable bundle exports to the cable support by the output of pay off arm on, accomplishes the laying of cable on the cable support.
By adopting the scheme, the multi-strand cable is transmitted to the wire binding machine in the form of a bundle through the cable guide device for inducing and converging the cable, and after the wire binding machine completes bundle restraint of the cable bundle, the cable can be laid on the cable support in the form of a bundle comprising a plurality of strands of cables, so that the laying efficiency of the cable is improved, and meanwhile, the regular laying of the cable is realized: if the cables are mutually restrained, the cable can be effectively prevented from floating.
Because the pay-off arm is in concrete during operation, there is the position adjustment for the railcar body according to cable support position in the output of pay-off arm, and the cable drum is generally fixed in the position on the railcar body, above cable restraint device because for the transmission route of cable provides the constraint station, in order to avoid the local excessive bending of cable and influence the normal transmission of cable, cause the cable damage, set up to support rotatable coupling on the support, like this, the support can rotate on the basis of the power that the cable applyed above that, after the support rotates to suitable position for the support, through locking piece realization both are locked, so, not only can make the cable atress be as little as possible do benefit to the cable and transmit smoothly in the transmission process, retrain the support through the retaining member and rock, do benefit to the tension control of cable simultaneously.
The further technical scheme is as follows:
the cable guide is a cylinder with one end facing the cable input end of the wire binding machine, the support comprises a column, a round hole is further formed in the lower end of the support, the column is in clearance fit with the round hole, and the locking piece is a locking bolt in threaded connection with the support. The present solution provides a specific cable guide form and a way of mating the support with the bracket. As a person skilled in the art, the locking bolt presses the support through the end portion, and the support can be fixed through friction force.
In order to enable the cable restraining device to have a cable movement track guiding function, and simultaneously the tension of the cable in the transmission process can be measured, the cable restraining device is provided with the following components: the device also comprises at least one fixed pulley arranged on the bracket, wherein the fixed pulley is distributed on a cable transmission path on the bracket;
the tension measuring device is a tension test disc, and the tension test disc obtains the tension on the cable by obtaining the extrusion force of the cable to the side surface of the tension test disc;
at least one fixed pulley is arranged on the side surface of the tension test disc, and a gap for clamping a cable is arranged between the pulley surface of the fixed pulley arranged on the side surface of the tension test disc and the tension test disc. In the scheme, through the gap, the action relation between the cable and the tension measuring device can be stabilized, so that an accurate tension value can be obtained.
Still including installing cable drum, drum actuating system, the pay off arm actuating system on the railcar body, drum actuating system is used for driving cable drum and rotates, the pay off arm actuating system is used for driving the pay off arm and goes up and down and rotate, drum actuating system and pay off arm actuating system share one set of electrohydraulic actuating system, and be provided with the energy storage ware in the electrohydraulic actuating system, the pipeline piping connection of hydraulic pump exit end in energy storage ware and the electrohydraulic actuating system: the accumulator may store pressure energy from the hydraulic pump when the hydraulic pump is operating, and the accumulator may release energy to an actuator in the electro-hydraulic drive system.
In the prior art, aiming at the railcar for subway cable laying, a corresponding wire coil driving system generally adopts a wire coil motor driving scheme, and because the cable wire coil is heavy and has a large number, the power of the required cable motor is larger, and a speed reducer is arranged at the output end of the wire coil motor for matching the driving torque required by the cable wire coil, but considering the volume of the wire coil motor, the power of the wire coil motor does not have more margin in general, namely, when the load is larger, the cable laying is generally completed by a mode of slowing down the paying-off speed. When the subway tunnel turns, the rotation speed of the cable drum is difficult to adjust by directly driving the cable drum through the drum motor, so that the cable is easily damaged or the laying quality is poor when the tunnel turns because the running speed of the railway car and the paying-off speed of the cable are matched to maintain the tension of the cable.
In the prior art, aiming at an electrohydraulic driving system, the electrohydraulic driving system is generally arranged to comprise an oil way, an oil tank, a motor, a hydraulic pump, an actuating mechanism which is a hydraulic motor or a hydraulic cylinder, a valve and the like, wherein the motor is used for driving the hydraulic pump to work so as to obtain pressurized hydraulic oil, the valve comprises an overflow valve, a one-way valve, a reversing valve, a switching valve and the like, and the oil tank is used for storing the hydraulic oil to be sucked into the oil way and storing the hydraulic oil discharged from the oil way.
In this scheme, set up to: the wire coil driving system and the pay-off arm driving system are both electrohydraulic driving systems, an energy accumulator is arranged in the electrohydraulic driving systems, and the energy accumulator is connected with a pipeline at the outlet end of a hydraulic pump in the electrohydraulic driving system: the accumulator may store pressure energy from the hydraulic pump when the hydraulic pump is operating, and the accumulator may release energy to an actuator in the electro-hydraulic drive system. When the hydraulic pump is particularly used, the hydraulic pump is driven to work by the motor in the smooth cable laying process or when no cable is laid, and the energy accumulator stores the pressure energy output by the hydraulic pump; when the cable drum needs to be changed in speed to adapt to the travelling speed of the rail car body, under the condition that the working state of a motor is unchanged, the working state of the electro-hydraulic driving system is adjusted by utilizing a corresponding valve in the electro-hydraulic driving system, for example, when the cable drum needs to rotate in a decelerating way, the pressure energy output by the hydraulic pump, the opening adjustment of an overflow valve in an oil way, the displacement change of a hydraulic motor serving as an actuating mechanism and the like are stored through an energy accumulator, so that the cable drum rotates in a decelerating way. When the cable drum needs to rotate in an accelerating way, hydraulic oil stored in the energy accumulator outputs energy to the actuating mechanism through the oil way so as to drive the cable drum to rotate in an accelerating way.
As described above, the scheme utilizes the electrohydraulic driving system to drive the corresponding paying-off arm and the cable spool on the railway vehicle to move, and utilizes the characteristic that the working parameters of the electrohydraulic driving system are easy to adjust, so that the paying-off arm and the cable spool can be controlled in a higher precision and with a faster response; meanwhile, the energy accumulator is arranged, and the energy output by the energy accumulator can be utilized to make up the deficiency of the power of the motor according to the drive power abrupt change requirement. Finally, the aim of conveniently matching the power required by the cable laying is fulfilled.
When the railway vehicle works, the cable drum rotates, and the paying-off arm needs to rotate and lift according to the paying-off arm, so that the driving mechanism serving as the paying-off arm preferably comprises a hydraulic cylinder and a hydraulic motor, and the driving mechanism of the cable drum comprises the hydraulic motor.
As another technical solution for indirectly obtaining the tension on the cable, it is provided that: the electrohydraulic driving system comprises a first hydraulic motor for driving the cable drum to rotate, and a torque sensor is connected in series on a transmission shaft between the first hydraulic motor and the cable drum. In the scheme, the torque of the first hydraulic motor is obtained through the torque sensor, and the measured value can be converted into the cable tension through calculation.
Because cable tension is one of the important control parameters of subway cable laying, for conveniently realizing automatic control of cable tension, set up to: the constant tension control module is used for realizing tension stability control on the cable and comprises a calculation module, and the calculation module is used for controlling actual working parameters of the electrohydraulic driving system according to actual tension values on the cable. Specifically, when the subway cable is laid, three strands of cables are generally arranged, for example, after the three strands of cables are automatically bound by a wire binding machine, the three strands of cables are output to a tension test disc, a measured tension signal is sent to a calculation module by the tension test disc, the calculation module converts, analyzes and processes the signal, then sends out a control signal, adjusts the opening of a proportional overflow valve used for controlling the first hydraulic motor to work in an electrohydraulic driving system, and controls the pressure at two ends of the quantitative motor aiming at the first hydraulic motor which is a quantitative motor, so that the output torque of the first hydraulic motor is adjusted. According to the scheme, the needed tension value is input into the constant tension control system before paying-off operation, the proportional overflow valve has an opening according to the preset tension value, the output torque of the first hydraulic motor is controlled, and tension paying-off is controlled. More specifically: the tension sensor is arranged on the tension test disc, the collected actual tension forms closed loop control through feedback, and the closed loop control is compared with the set tension, so that the opening degree of the proportional overflow valve is controlled to keep the output torque of the low speed and the large torque consistent with the set tension. Equivalently, the rotational speed of the cable drum can be controlled based on speed feedback: the speed sensor is used for collecting speed signals, the displacement of the variable motor is controlled through feedback, the rotating speed of the wire coil is automatically matched to be synchronous with the speed of the vehicle, and the first hydraulic motor is the variable motor under the condition.
As a specific implementation scheme of the pay-off arm driving system, the method comprises the following steps: the pay-off arm driving system comprises a hydraulic cylinder, a pay-off arm rotary table and a second hydraulic motor, the pay-off arm is rotatably connected with the railcar body through the pay-off arm rotary table, the hydraulic cylinder is used for driving the pay-off arm to lift, and the second hydraulic motor is used for driving the pay-off arm rotary table to rotate. As a person skilled in the art, when the hydraulic cylinder is specifically used, the hydraulic cylinder can be arranged to drive the paying-off end of the paying-off arm to ascend or descend, and can also be used to drive the paying-off arm to ascend and descend integrally.
As described above, since the existing pay-off arm for subway cable laying is very large in mass, such as 2-3 tons in general, in order to avoid a great waste of energy when the pay-off arm is lowered, it is set to: when the hydraulic cylinder acts to enable the pay-off arm to descend, the energy accumulator stores energy through an oil way connected with the hydraulic cylinder.
As a technical scheme for controlling rotation of the pay-off arm by controlling the displacement, the device is as follows: the second hydraulic motor is a variable displacement motor.
In order to simplify the railcar structure, set up to: the wire coil driving system and the pay-off arm driving system share the same set of electrohydraulic driving system; for realizing energy storage when energy storage ware needs and utilizing the entry to put liquid, reduce the impact of this system during operation, improve house grandpa proportion, improve the energy utilization rate, set up to: and a switching valve is also connected in series on a pipeline between the pipeline at the outlet end of the hydraulic pump and the energy accumulator.
The invention has the following beneficial effects:
in this scheme, through setting up to still including cable restraint device, cable restraint device is located the cable drum when specific application and is gone up with the cable transfer route of pay off arm output, and when specific application, stranded cable passes through the cable guide and passes through the mode of cable bundle to the wiring machine transmission, and the wiring machine accomplishes cable bundle bundling back, and the cable bundle exports to the cable support by the output of pay off arm on, accomplishes the laying of cable on the cable support.
By adopting the scheme, the multi-strand cable is transmitted to the wire binding machine in the form of a bundle through the cable guide device for inducing and converging the cable, and after the wire binding machine completes bundle restraint of the cable bundle, the cable can be laid on the cable support in the form of a bundle comprising a plurality of strands of cables, so that the laying efficiency of the cable is improved, and meanwhile, the regular laying of the cable is realized: if the cables are mutually restrained, the cable can be effectively prevented from floating.
Because the pay-off arm is in concrete during operation, there is the position adjustment for the railcar body according to cable support position in the output of pay-off arm, and the cable drum is generally fixed in the position on the railcar body, above cable restraint device because for the transmission route of cable provides the constraint station, in order to avoid the local excessive bending of cable and influence the normal transmission of cable, cause the cable damage, set up to support rotatable coupling on the support, like this, the support can rotate on the basis of the power that the cable applyed above that, after the support rotates to suitable position for the support, through locking piece realization both are locked, so, not only can make the cable atress be as little as possible do benefit to the cable and transmit smoothly in the transmission process, retrain the support through the retaining member and rock, do benefit to the tension control of cable simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of a specific embodiment of a subway tunnel construction railcar for facilitating regular cable laying according to the present invention;
FIG. 2 is a schematic structural diagram of an electro-hydraulic driving system in a specific embodiment of a subway tunnel construction railcar for facilitating regular cable laying according to the present invention;
FIG. 3 is a schematic diagram of constant tension control in a specific embodiment of a subway tunnel construction railcar for facilitating regular cable laying according to the present invention;
fig. 4 is a schematic structural diagram of a cable constraint device in a specific embodiment of a subway tunnel construction railcar for conveniently realizing regular cable laying according to the present invention.
The labels in the figure are respectively: 1. the motor, 2, hydraulic pump, 3, first check valve, 4, first relief valve, 5, second check valve, 6, first tank, 7, first hydraulic motor, 8, torque sensor, 9, first reduction gear, 10, cable, 11, fifth switching valve, 12, third check valve, 13, first switching valve, 14, second switching valve, 15, second relief valve, 16, second tank, 17, accumulator, 18, hydraulic cylinder, 19, throttle valve, 20, first reversing valve, 21, fourth check valve, 22, first proportional relief valve, 23, second proportional relief valve, 24, third switching valve, 25, fourth switching valve, 26, third tank, 27, fourth tank, 28, second reversing valve, 29, second hydraulic motor, 30, second reduction gear, 31, arm turntable, 32, tension measuring device, 33, pay-off arm pose controller, 34, drive system, 35, cable drum, 36, wire drum body, 37, 38, pay-off arm, 39, wire holder, 40, cable holder, 42, cable holder, 41, locking member, etc.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1, 2 and 4, the subway tunnel construction railcar convenient for realizing regular cable laying comprises a railcar body, wherein a paying-off arm 38 is arranged on the railcar body, the railcar body further comprises a cable restraining device arranged on the paying-off arm 38, the cable restraining device comprises a support 39, a bracket 40, a cable guide 42 and a wire binding machine 36, the support 39 is fixed on the paying-off arm 38, the bracket 40 is rotatably connected to the support 39, and the railcar further comprises a locking piece 41 for realizing the fixation of the bracket 40 relative to the support 39;
the cable guide 42 and the wire binding machine 36 are fixedly mounted on the bracket 40, and the cable output end of the cable guide 42 is connected with the cable input end of the wire binding machine 36.
In the prior art, aiming at subway tunnel construction, the number of cables laid on the cable bracket 40 is generally multiple, and at present, a single cable is generally laid on the cable bracket 40 independently, so that not only is the cable laying efficiency unfavorable, but also the cables cannot be regularly fixed on the cable bracket 40 due to the tension difference between the cables.
In this scheme, through setting up to still including cable restraint device, cable restraint device is located the cable drum 35 and is gone up with the cable transfer route of pay-off arm 38 output when specific application, and when specific application, stranded cable passes through cable guide 42 and passes through the mode of cable bundle to the wiring machine 36, and after the wiring machine 36 completed the cable bundle bundling, the cable bundle was exported to cable support 40 by the output of pay-off arm 38, accomplishes the laying of cable on cable support 40.
With the above scheme, the cables are induced and converged through the cable guide 42, so that the multi-strand cables are transmitted to the wire binding machine 36 in the form of bundles, and after the wire binding machine 36 completes the bundle binding of the cables, the cables can be laid on the cable support 40 in the form of bundles comprising the multi-strand cables, so that not only is the laying efficiency of the cables facilitated, but also the regular laying of the cables is facilitated: if the cables are mutually restrained, the cable can be effectively prevented from floating.
Because the pay-off arm 38 is in concrete work, there is the position adjustment relative to the railcar body according to cable support 40 position at the output of pay-off arm 38, and the cable drum 35 is generally fixed in position on the railcar body, above cable restraint device is because providing the constraint station for the transmission path of cable, in order to avoid the local excessive bending of cable to influence the normal transmission of cable, cause cable damage, set up support 40 rotatable coupling on support 39, so, support 40 can rotate on the basis of the power that the cable applyed on it, after support 40 rotates to suitable position relative to support 39, realizes through retaining member 41 that both lockings, so, not only can make the cable atress be as little as possible do benefit to the cable and transmit smoothly in the transmission process, retrain support 40 through retaining member 41 simultaneously and rock, do benefit to the tension control of cable.
Example 2:
this embodiment is further defined on the basis of embodiment 1, as shown in fig. 1, 2 and 4, the cable guide 42 is a cylinder with one end facing the cable input end of the wire binding machine 36, the support 39 includes a column, the lower end of the support 40 is further provided with a circular hole, the column is clearance fit in the circular hole, and the locking member 41 is a locking bolt screwed on the support 40. The present solution provides a specific form of cable guide 42 and the manner in which the abutment 39 engages the bracket 40. As a person skilled in the art, the locking bolt presses the support 39 by the end, and the support 39 and the bracket 40 are fixed by friction.
In order to enable the cable restraining device to have a cable movement track guiding function, and simultaneously the tension of the cable in the transmission process can be measured, the cable restraining device is provided with the following components: also comprises at least one fixed pulley 43 mounted on the bracket 40, wherein the fixed pulley 43 is distributed on a cable transmission path on the bracket 40;
the tension measuring device 32 is arranged on the bracket 40, the tension measuring device 32 is a tension test disc, and the tension test disc obtains the tension on the cable by obtaining the extrusion force of the cable to the side surface of the tension test disc;
at least one fixed pulley 43 is arranged on the side surface of the tension test disc, and a gap for clamping a cable is arranged between the pulley surface of the fixed pulley 43 arranged on the side surface of the tension test disc and the tension test disc. In this embodiment, the action relationship between the cable and the tension measuring device 32 can be stabilized by the gap, so as to obtain an accurate tension value.
Example 3:
the embodiment is further defined on the basis of embodiment 1, as shown in fig. 1 to 4, the device further comprises a cable drum 35, a drum driving system 34 and a pay-off arm 38 driving system which are installed on the rail car body, wherein the drum driving system 34 is used for driving the cable drum 35 to rotate, the pay-off arm 38 driving system is used for driving the pay-off arm 38 to lift and rotate, the drum driving system 34 and the pay-off arm 38 driving system share a set of electrohydraulic driving system, an energy accumulator 17 is arranged in the electrohydraulic driving system, and the energy accumulator 17 is connected with a pipeline at the outlet end of the hydraulic pump 2 in the electrohydraulic driving system: during operation of the hydraulic pump 2, the accumulator 17 may store pressure energy from the hydraulic pump 2, and the accumulator 17 may release energy to an actuator in the electro-hydraulic drive system.
In the prior art, for a railcar for subway cable laying, the corresponding wire coil driving system 34 generally adopts a wire coil motor driving scheme, because the cable coil 35 has large weight and a large number, the power of the cable motor is larger, and a speed reducer is arranged at the output end of the wire coil motor for matching the driving torque required by the cable coil 35, but considering the volume of the wire coil motor, the power of the wire coil motor does not have more margin in general, namely, when the load is larger, the cable laying is generally completed by slowing down the paying-off speed. When the subway tunnel turns, the rotation speed of the cable drum 35 is difficult to adjust by directly driving the cable drum 35 through the drum motor, so that the cable is easily damaged or the laying quality is poor when the tunnel turns because the running speed of the railway car and the paying-off speed of the cable are matched to maintain the tension of the cable.
In the prior art, for an electro-hydraulic driving system, the electro-hydraulic driving system is generally configured to include an oil path, an oil tank, a motor, a hydraulic pump 2, an actuating mechanism that is a hydraulic motor or a hydraulic cylinder 18, a valve, and the like, where the motor is used for driving the hydraulic pump 2 to work so as to obtain pressurized hydraulic oil, the valve includes an overflow valve, a one-way valve, a reversing valve, a switching valve, and the like, and the oil tank is used for storing the hydraulic oil to be sucked into the oil path and storing the hydraulic oil discharged from the oil path.
In this scheme, set up to: the wire coil driving system 34 and the pay-off arm 38 are both electrohydraulic driving systems, an energy accumulator 17 is arranged in the electrohydraulic driving systems, and the energy accumulator 17 is connected with a pipeline at the outlet end of the hydraulic pump 2 in the electrohydraulic driving systems: during operation of the hydraulic pump 2, the accumulator 17 may store pressure energy from the hydraulic pump 2, and the accumulator 17 may release energy to an actuator in the electro-hydraulic drive system. In specific application, the hydraulic pump 2 is driven to work by the motor during smooth cable laying or when no cable laying is performed, and the accumulator 17 stores pressure energy output by the hydraulic pump 2; when the cable drum 35 needs to be changed in speed to adapt to the travelling speed of the rail car body, under the condition that the working state of a motor is unchanged, the working state of the electro-hydraulic driving system is adjusted by utilizing a corresponding valve in the electro-hydraulic driving system, for example, when the cable drum 35 needs to rotate in a decelerating way, the pressure energy output by the hydraulic pump 2, the opening adjustment of an overflow valve in an oil way, the displacement change of a hydraulic motor serving as an actuating mechanism and the like are stored through the energy accumulator 17, so that the cable drum 35 rotates in a decelerating way. When the cable drum 35 needs to rotate in an accelerating way, the hydraulic oil stored in the energy accumulator 17 outputs energy to the actuating mechanism through the oil way to drive the cable drum 35 to rotate in an accelerating way.
As described above, the scheme utilizes the electrohydraulic driving system to drive the corresponding paying-off arm 38 and the cable drum 35 on the railway vehicle to move, and utilizes the characteristic that the working parameters of the electrohydraulic driving system are easy to adjust, so that the paying-off arm 38 and the cable drum 35 can be controlled in a higher precision and faster in response; meanwhile, the energy accumulator 17 is arranged, and the energy output by the energy accumulator 17 can be utilized to make up for the deficiency of the motor power according to the drive power abrupt change requirement. Finally, the aim of conveniently matching the power required by the cable laying is fulfilled.
As a person skilled in the art, when the present railcar works, the cable drum 35 may rotate, and the pay-off arm 38 needs to rotate and lift for the pay-off arm 38, so the driving mechanism of the pay-off arm 38 preferably includes the hydraulic cylinder 18 and the hydraulic motor, and the driving mechanism of the cable drum 35 includes the hydraulic motor.
As another technical solution for indirectly obtaining the tension on the cable, it is provided that: the electrohydraulic driving system comprises a first hydraulic motor for driving the cable drum 35 to rotate, and a torque sensor 8 is further connected in series on a transmission shaft between the first hydraulic motor and the cable drum 35. In this solution, the torque of the first hydraulic motor is obtained by the torque sensor 8, and the measured value can be converted into the cable tension by calculation.
Because cable tension is one of the important control parameters of subway cable laying, for conveniently realizing automatic control of cable tension, set up to: the constant tension control module is used for realizing tension stability control on the cable and comprises a calculation module, and the calculation module is used for controlling actual working parameters of the electrohydraulic driving system according to actual tension values on the cable. Specifically, because the subway cable is generally three-stranded when being laid, for example, after the three-stranded cable passes through the automatic wire binding of the wire binding machine 36, the three-stranded cable is output to the tension test disc, the tension test disc sends a measured tension signal to the calculation module, the calculation module sends a control signal after converting, analyzing and processing the signal, the opening of the proportional overflow valve used for controlling the operation of the first hydraulic motor in the electro-hydraulic driving system is adjusted, and the pressure at two ends of the quantitative motor is controlled for the first hydraulic motor which is the quantitative motor, so that the output torque of the first hydraulic motor is adjusted. According to the scheme, the needed tension value is input into the constant tension control system before paying-off operation, the proportional overflow valve has an opening according to the preset tension value, the output torque of the first hydraulic motor is controlled, and tension paying-off is controlled. More specifically: the tension sensor is arranged on the tension test disc, the collected actual tension forms closed loop control through feedback, and the closed loop control is compared with the set tension, so that the opening degree of the proportional overflow valve is controlled to keep the output torque of the low speed and the large torque consistent with the set tension. Equivalently, the rotational speed control of the cable drum 35, which may be based on speed feedback: the speed sensor is used for collecting speed signals, the displacement of the variable motor is controlled through feedback, the rotating speed of the wire coil is automatically matched to be synchronous with the speed of the vehicle, and the first hydraulic motor is the variable motor under the condition.
As a specific implementation of the pay-off arm 38 driving system, it is set to: the pay-off arm 38 driving system comprises a hydraulic cylinder 18, a pay-off arm 38 rotary table 31 and a second hydraulic motor, the pay-off arm 38 is rotatably connected with the railcar body through the pay-off arm 38 rotary table 31, the hydraulic cylinder 18 is used for driving the pay-off arm 38 to ascend and descend, and the second hydraulic motor is used for driving the pay-off arm 38 rotary table 31 to rotate. As a person skilled in the art, in the specific application, the hydraulic cylinder 18 may be configured to only drive the pay-off end of the pay-off arm 38 to rise or fall, or may be configured to drive the pay-off arm 38 to rise and fall as a whole.
As described above, since the existing pay-off arm 38 for subway cable laying is very large in mass, such as 2 to 3 tons in general, in order to avoid a large waste of energy when the pay-off arm 38 is lowered, it is set to: when the hydraulic cylinder 18 is actuated to lower the pay-off arm 38, the accumulator 17 stores energy through an oil passage connected to the hydraulic cylinder 18.
As a technical solution for controlling the rotation of the pay-off arm 38 by controlling the displacement, it is provided that: the second hydraulic motor is a variable displacement motor.
In order to simplify the railcar structure, set up to: the wire coil driving system 34 and the paying-off arm 38 share the same electrohydraulic driving system; in order to realize energy storage when the energy accumulator 17 is needed and liquid discharge by an inlet, the impact of the system in working is reduced, the house-to-house ratio is improved, the energy utilization rate is improved, and the system is set as follows: a switch valve is also connected in series on the pipeline between the pipeline at the outlet end of the hydraulic pump 2 and the accumulator 17.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and it is not intended that the invention be limited to these descriptions. Other embodiments of the invention, which are apparent to those skilled in the art to which the invention pertains without departing from its technical scope, shall be covered by the protection scope of the invention.
Claims (8)
1. The subway tunnel construction railcar convenient to realize regular cable laying comprises a railcar body (37), wherein a pay-off arm (38) is arranged on the railcar body (37), and is characterized by further comprising a cable restraining device arranged on the pay-off arm (38), wherein the cable restraining device comprises a support (39), a bracket (40), a cable guide (42) and a wire binding machine (36), the support (39) is fixed on the pay-off arm (38), the bracket (40) is rotatably connected onto the support (39), and the railcar further comprises a locking piece (41) for realizing the fixation of the bracket (40) relative to the support (39);
the cable guide (42) and the wire binding machine (36) are fixedly arranged on the bracket (40), and the cable output end of the cable guide (42) is connected with the cable input end of the wire binding machine (36);
the cable guide (42) is a cylinder with one end facing the cable input end of the wire binding machine (36), the support (39) comprises a column, a round hole is further formed in the lower end of the support (40), the column is in clearance fit in the round hole, and the locking piece (41) is a locking bolt in threaded connection with the support (40);
the cable drum is characterized by further comprising a cable drum (35), a drum driving system (34) and a pay-off arm driving system which are arranged on the rail car body (37), wherein the drum driving system (34) is used for driving the cable drum (35) to rotate, the pay-off arm driving system is used for driving the pay-off arm (38) to lift and rotate, the drum driving system (34) and the pay-off arm driving system share one set of electrohydraulic driving system, an energy accumulator (17) is arranged in the electrohydraulic driving system, and the energy accumulator (17) is connected with a pipeline at the outlet end of the hydraulic pump (2) in the electrohydraulic driving system: when the hydraulic pump (2) is in operation, the energy accumulator (17) can store pressure energy from the hydraulic pump (2), and the energy accumulator (17) can release energy to an actuator in the electrohydraulic drive system.
2. The subway tunnel construction railcar facilitating regular cabling according to claim 1, further comprising at least one fixed pulley (43) mounted on a bracket (40), said fixed pulley (43) being distributed on a cable transfer path on the bracket (40);
the tension measuring device (32) is arranged on the bracket (40), the tension measuring device (32) is a tension test disc, and the tension test disc obtains the tension on the cable by obtaining the extrusion force of the cable to the side surface of the tension test disc;
at least one fixed pulley (43) is arranged on the side surface of the tension test disc, and a gap for clamping the cable is arranged between the pulley surface of the fixed pulley (43) arranged on the side surface of the tension test disc and the tension test disc.
3. The subway tunnel construction railcar convenient to realize regular cable laying according to claim 1 is characterized in that the electrohydraulic driving system comprises a first hydraulic motor (7) for driving a cable drum (35) to rotate, and a torque sensor (8) is further connected in series on a transmission shaft between the first hydraulic motor (7) and the cable drum (35).
4. A subway tunnel construction railcar according to claim 3, characterized by further comprising a constant tension control module for implementing tension stability control on the cable (10), said constant tension control module comprising a calculation module for controlling the actual operating parameters of the electrohydraulic driving system according to the actual tension value on the cable (10).
5. The subway tunnel construction railcar convenient to implement regular cable laying according to claim 1, wherein the pay-off arm driving system comprises a hydraulic cylinder (18), a pay-off arm rotary table (31) and a second hydraulic motor (29), the pay-off arm (38) is rotatably connected with the railcar body (37) through the pay-off arm rotary table (31), the hydraulic cylinder (18) is used for driving the pay-off arm (38) to lift, and the second hydraulic motor (29) is used for driving the pay-off arm rotary table (31) to rotate.
6. The subway tunnel construction railcar facilitating regular cabling according to claim 5, wherein said accumulator (17) stores energy through an oil passage connected to the hydraulic cylinder (18) when the hydraulic cylinder (18) is actuated to lower the pay-off arm (38).
7. Subway tunnel construction railcar facilitating regular cabling according to claim 6 characterized in that said second hydraulic motor (29) is a variable motor.
8. The subway tunnel construction railcar convenient to realize regular cable laying according to claim 1 is characterized in that a switching valve is also connected in series on a pipeline between a pipeline at the outlet end of a hydraulic pump (2) and the accumulator (17).
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| CN114336426A (en) * | 2021-12-29 | 2022-04-12 | 中铁电气化局集团有限公司 | Looped network cable laying device |
| CN116417944B (en) * | 2023-06-02 | 2023-08-08 | 山西路桥第六工程有限公司 | Cable laying device for power tunnel construction |
| CN116799705B (en) * | 2023-08-29 | 2023-10-24 | 山西际安电气有限公司 | Fixed bolster of cable installation |
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