CN113062156A - Rail elastic strip fastener gap control system and control method thereof - Google Patents
Rail elastic strip fastener gap control system and control method thereof Download PDFInfo
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- CN113062156A CN113062156A CN202110318179.5A CN202110318179A CN113062156A CN 113062156 A CN113062156 A CN 113062156A CN 202110318179 A CN202110318179 A CN 202110318179A CN 113062156 A CN113062156 A CN 113062156A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/24—Fixing or removing detachable fastening means or accessories thereof; Pre-assembling track components by detachable fastening means
- E01B29/28—Fixing or removing detachable fastening means or accessories thereof; Pre-assembling track components by detachable fastening means the fastening means being of screw-and-nut type; Apparatus therefor, adapted to additionally drilling holes
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- Engineering & Computer Science (AREA)
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention relates to a control system and a control method for a gap of a rail elastic strip fastener, wherein the method comprises the steps of obtaining the torque change of a bolt or a screw of the rail elastic strip fastener; judging whether the torque of the track elastic strip fastener bolt or screw changes suddenly; if the torque of the track elastic strip fastener bolt or screw changes suddenly, the controller controls the main shaft of the motor to stop rotating and controls the main shaft of the motor to rotate reversely. The control method can effectively adjust the gap between the rail elastic strip fastener and the steel rail, and the adjusted gap of the rail elastic strip fastener meets the requirements of passenger special lines and high-speed rail ballastless track lines on fastener bolt installation.
Description
Technical Field
The invention relates to the technical field of rail transit equipment, in particular to a system and a method for controlling a gap between a rail elastic strip fastener and a gap.
Background
The rail fastening system is an important component of a rail foundation component, and not only has certain fastening pressure and can bear the action of vertical force, transverse force and longitudinal force from a steel rail, but also plays an important role in ensuring the elasticity of the rail. In particular in ballastless tracks, the elasticity of the track comes almost entirely from the track fastener system, and the geometric accuracy of the ballastless track is also maintained and adjusted by means of the fastener system. The appropriate elasticity of the ballastless track is maintained, so that the interference factors which endanger the safe running of the train, such as wheel load change, rail corrugation, high-frequency vibration, environmental influence and the like of the high-speed train, can be effectively reduced. Therefore, the correct installation of the rail clip is important for the safety and comfort of the high-speed train operation.
The spring bar fasteners with bolts are used in a large number in China railway track lines, after the tracks are laid and the trains are communicated, the fastening force of the steel rail fasteners can change due to the influence of vibration of the trains, the screwing torque of the fastener bolts needs to be frequently checked and adjusted, the fastener bolts of each km line have more 6150 and 6660 groups, and the checking and maintaining workload is very large.
The fastening pressure of the elastic strip fastener on the steel rail is generated by compressing the elastic strip by a bolt to deform, and the qualified fastening pressure of the elastic strip installation is based on the design that the gap between the front end of the elastic strip and the steel rail is 0-0.5 mm. Therefore, the ' standard for judging whether the elastic strip is installed in place ' specified in the technical manual for installing the fastener system of the passenger special railway is based on the condition that the lower jaw at the front end of the middle part of the elastic strip is just contacted with the steel rail, and the gap between the lower jaw and the steel rail is not more than 0.5mm '. In article 3.5.3, the rule for repairing railway lines states that "the lower jaw of the middle front end of the spring bar fastener should abut against the gage plate (no more than 1mm from the seam) or the torque should be kept at 80-150 Nm. "
Although the installation requirement of railway technical rules on the 'gap between the open seams' of the elastic strip fastener is already released, the professional installation equipment and method are not in place, so that the railway construction site basically takes the control of the accuracy of the tightening torque of the bolt as a main management method. Because the track maintenance construction site is influenced by the bolt lubrication condition of the fastener (a certain number of bolts are lack of oil coating, even threads are rusted), the gap between the elastic strip and the gap when the torque is in place is greatly different, and the actual fastening pressure of the elastic strip fastener is not balanced and consistent. In terms of the actual state of the fastener bolt on the line site, the tightening torque of the fastener bolt and the gap between the elastic strips and the seam cannot be stably corresponding to each other. This is also an old and difficult problem for fastener system designers and job site managers to have not been able to agree for many years. For this reason, the inventors of the present application have proposed an effective solution by the present application to the drawbacks of the conventional techniques described above.
The Chinese patent application with the application number of 201810136056.8 previously applied by the applicant discloses a track fastener bolt adjusting device and a bolt adjusting method thereof, and the track fastener bolt adjusting device comprises a roller wheel and a rail clamping wheel which are arranged on a frame, and a motor, a lithium battery, a speed reducer, a torque sensor and a bolt sleeve which are arranged on a support frame, wherein a rotating shaft of the motor and the speed reducer are coaxially connected to drive the bolt sleeve to rotate, the torque sensor is arranged between the speed reducer and the bolt sleeve, and transmits measured data to a controller through a circuit and controls the action of the motor according to a characteristic value of transmitted torque change. Although the track fastener bolt adjusting device is simple in structure, the control precision is high. However, in the track fastener bolt adjusting method, the real-time torque value of the bolt sleeve sleeved on the bolt currently detected by the torque sensor on the bolt adjusting device is obtained and compared with the threshold value of the preset torque. When the real-time torque value is smaller than a preset torque threshold value, adjusting a bolt sleeve corresponding to the current track fastener bolt to rotate rightwards; and when the real-time torque value is equal to a preset torque threshold value, controlling the bolt sleeve corresponding to the current track fastener bolt to stop rotating. By this method, a specific torque value of the torque threshold needs to be determined in advance. However, the actual environment and working conditions of each rail fastener bolt or screw to be adjusted are different, and it is obviously not accurate enough to use a single preset torque threshold value as a basis for adjusting different rail fastener bolts or screws as a judgment standard.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a system and a method for controlling the gap between a rail elastic strip fastener and a gap. The control method can effectively adjust the gap between the rail elastic strip fastener and the steel rail, and meets the requirement of the passenger special line and the high-speed rail ballastless track line on fastener bolt installation.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for controlling gap between elastic fastener and gap of track includes
Acquiring the torque change of a bolt or a screw of the rail elastic strip fastener;
judging whether the torque of the track elastic strip fastener bolt or screw changes suddenly;
if the torque of the track elastic strip fastener bolt or screw suddenly changes, the controller controls the main shaft of the motor to stop rotating and controls the main shaft of the motor to reversely rotate;
if the torque of the rail elastic strip fastener bolt or screw does not change suddenly, the controller controls the main shaft of the motor to continue rotating.
Preferably, the controller controls the main shaft of the motor to rotate reversely, so that the gap distance between the rail elastic strip fastener and the rail is 0-0.5 mm.
Preferably, the torque sensor collects the current torque value of the motor spindle in real time and transmits the current torque value to the controller.
Preferably, the controller receives the torque value change rate measured by the torque sensor in real time and judges whether the currently measured torque value change rate changes suddenly.
A second object of the present invention is to provide a system for controlling gap between a rail elastic strip fastener and a seam, comprising:
a controller, a torque sensor and a motor;
the torque sensor and the motor are respectively connected with the controller;
the torque sensor is used for acquiring the current torque value of the main shaft of the motor;
the controller is used for executing the gap control method of the rail elastic strip fastener of claim 1.
The third objective of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium has computer-executable instructions, and when a controller executes the computer-executable instructions, the method for controlling the gap between the track spring strip fastener and the gap is implemented.
Preferably, a display is further included; the display is electrically connected with the controller through a circuit and used for displaying the torque value of the track elastic strip fastener bolt or screw measured by the torque sensor.
Preferably, the torque sensor acquires the current torque value of the motor in real time.
The invention discloses a method for controlling gap between a rail elastic strip fastener and a gap, which is characterized in that the instantaneous change value of the front end of the elastic strip contacting a steel rail is searched according to the characteristic that the elastic rigidity of the rail elastic strip fastener before and after contacting the steel rail has inflection point change. The principle is as follows: before the front end of the rail elastic strip fastener contacts a steel rail, a mechanical model that a bolt or a screw extrudes the elastic strip fastener to deform is in a cantilever beam mode, the rigidity of the elastic strip fastener is K1, and the torque coefficient of a corresponding screwed bolt or screw is T1; when the front end of the elastic strip fastener contacts the steel rail, the mechanical model of deformation of the elastic strip fastener extruded by the bolt or the screw is in a simple beam mode, the rigidity of the elastic strip fastener is K2, and the torque coefficient of the corresponding screwed bolt or screw is T2; the turning point of T1 and T2 is the inflection point of the change in the torque coefficient, which occurs at the moment the front end of the spring clip contacts the rail. Therefore, the inflection point is found at the moment when the front end of the spring fastener contacts the rail. The action of screwing the bolt or the screw is rapidly stopped at the moment of contacting the steel rail, so that the bolt or the screw is stopped at the state that the front end of the elastic strip just contacts the steel rail, and then the bolt is automatically rotated reversely for a set angle, so that the compressed elastic strip is properly loosened, and the gap of 0-0.5mm is obtained.
Compared with the prior art, the system and the method for controlling the gap between the elastic strip fastener of the track can effectively adjust the gap between the elastic strip fastener of the track and the steel rail, and meet the requirement of a passenger special line and a high-speed railway ballastless track line on fastener bolt installation.
Drawings
Fig. 1 is a flow chart of a method for controlling a gap between a rail elastic strip fastener and a seam according to the invention.
Fig. 2 is a characteristic diagram showing inflection point changes in the elastic rigidity of the rail spring clip according to the present invention before and after it contacts a rail.
Fig. 3 is a schematic structural diagram of a rail fastener bolt adjusting device in the rail elastic strip fastener gap control method according to a preferred embodiment of the invention.
Fig. 4 is a schematic structural diagram of another preferred embodiment of a rail fastener bolt adjusting device in the rail elastic strip fastener gap control method according to the invention.
Fig. 5 is a left side view schematically illustrating the rail fastener bolt adjusting device of the method for controlling the gap between the rail spring strip fastener and the gap, according to the present invention, shown in fig. 3.
Detailed Description
The following is a schematic view of the overall configuration of a preferred embodiment of a track fastener gap-separating fastener machine according to the invention;
example 1:
as shown in figures 1-2, a method for controlling gap of a rail elastic strip fastener includes the following steps
S1: acquiring the torque change of a bolt or a screw of the rail elastic strip fastener;
s2: judging whether the torque of the track elastic strip fastener bolt or screw changes suddenly;
s3: if the torque of the track elastic strip fastener bolt or screw suddenly changes, the controller controls the main shaft of the motor to stop rotating and controls the main shaft of the motor to reversely rotate; in step S3, the controller controls the spindle of the motor to rotate in reverse so that the gap distance between the rail spring clip and the rail is 0-0.5 mm. If the torque of the rail elastic strip fastener bolt or screw does not change suddenly, the controller controls the main shaft of the motor to continue rotating.
The torque sensor 6 collects the current torque value of the motor spindle in real time and transmits the current torque value to the controller.
The controller receives the torque value change rate measured by the torque sensor 6 in real time and judges whether the current measured torque value change rate changes suddenly.
Example 2:
a track spring bar fastener gap control system, comprising:
a controller, a torque sensor 6, a motor 4;
the torque sensor 6 and the motor 4 are respectively connected with the controller;
the torque sensor 6 is used for acquiring the current torque value of the main shaft of the motor 4;
the controller is used for executing the method for controlling the gap of the rail elastic strip fastener in the embodiment 1. In this embodiment, a display 20 is also included; the display screen 22 is electrically connected to the controller through a line, and is used for displaying the torque value of the track elastic strip fastener bolt or screw measured by the torque sensor 6. The torque sensor 6 collects the current torque value of the motor 4 in real time.
Example 3:
a computer-readable storage medium, wherein the computer-readable storage medium has computer-executable instructions, and when the controller executes the computer-executable instructions, the method for controlling the gap between the gaps of the rail elastic strip fastener in embodiment 1 is implemented.
Example 4:
as shown in the figures 1-5 of the drawings,
as shown in fig. 1 to 5, a rail clip bolt adjusting apparatus includes a frame 11 and two rollers 10 mounted on the frame 11. Either roller 10 is mounted at the front end of the frame 11, and the other roller 10 is mounted at the rear end of the frame 11. The front and the rear rollers 10 are located on the same straight line. The roller 10 is provided with a radial clamping groove. The rails 13 may be positioned within the radial slots. The rail clip bolt adjustment mechanism in this embodiment is snapped onto the rail by means of rollers 10 mounted on the carriage 11. The roller 10 can roll on the rail. The roller 10 is made of a metal material. Rail clamping wheels 14 are also provided on either side of the frame 11. The rail clamping wheels 14 are fixedly mounted on the side walls of the middle position of the frame 11 through the connecting bracket 20. The rail clamping wheel 14 can movably contact with the lower jaw of the rail head of the steel rail 13 in a rolling way. The rail clip bolt adjusting device in the present embodiment is fixed by the roller 10 and the rail clamping wheel 14 on the frame 11. The rail fastener in this embodiment is a spring-strip fastener. A support frame 15 with a T-shaped structure is rotatably arranged at the middle section of the frame 11. The front end of the support frame 15 is provided with a motor 4, a speed reducer 5, a torque sensor 6 and a bolt sleeve 8. The motor 4 is a direct current motor. The rotating shaft of the motor 4 and the speed reducer 5 are coaxially connected with a movable bolt sleeve 8 to rotate, and a torque sensor 6 is arranged between the speed reducer 5 and the bolt sleeve 8. The torque sensor 6 is connected with the torque measurement and control system 3 arranged on the support frame 15 through a line. A support 16 made of metal material is fixedly arranged at the tail part of the support frame 15, a battery bin 17 is fixedly arranged on the support 16, and the lithium battery 9 is detachably arranged in the battery bin 17. A cover 20 is hinged to the battery compartment 17 in an openable and closable manner. The battery compartment 17 in this embodiment is made of a metal material. In this embodiment, the torque measurement and control unit 3 includes a controller 4, a display screen 22 and a memory, and the display screen 22 is an LED display screen. The display screen 22 is used for displaying the torque value of the track fastener bolt measured by the torque sensor 6 in real time. The memory is used for storing the real-time torque value measured by the torque sensor 6. The torque sensor 6 transmits the measured data to the controller 4 through a line. The controller 4 controls the rotation shaft of the motor 4 to rotate so as to drive the bolt sleeve 8 to rotate. And the torque sensor 6 controls the rotation shaft of the motor 4 to rotate to drive the bolt sleeve to rotate through the controller after the measured torque change of the bolt sleeve 8 is subjected to a mutation point. The catastrophe point is a change point of the elastic strip mechanical model. The change points are: when the jaw of the middle front end of the elastic strip fastener just contacts with a steel rail or a base plate, the stress state of the elastic strip fastener is changed from a cantilever beam model to a simply supported beam model, and the rigidity of the elastic strip just changes at the initial point. The torque sensor 6 collects the change point of the rigidity of the elastic strip in real time.
The operating lever 2 is respectively hinged on two sides of the support frame 15 in a rotatable manner. A connecting rod 18 is movably hinged at the front end of each operating rod 2, a damping spring 19 is sleeved on the connecting rod 18, and the other end of the connecting rod 18 movably penetrates through wing plates at two sides of the support frame 15. The end of the connecting rod 18 is provided with a threaded structure and a nut is arranged on the threaded structure. One end of the damping spring 19 is movably contacted with a barrel cap 21 on the connecting rod 18, and the other end is movably contacted with a wing plate of the supporting frame 15. In the present embodiment, an illumination lamp 7 is further provided on the wing panel. The lighting lamp 7 is connected with a control button 1 through a circuit, and the control button 1 is electrically connected with a lithium battery 9 through a circuit.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
After reading this specification, it will be apparent to those skilled in the art that the present invention is comprised of a combination of prior art, some of which are described in detail herein and some of which are not discussed in any great detail for the sake of brevity of this specification, but will be known to those skilled in the art after reading this specification. Moreover, it will be appreciated by those skilled in the art that the incorporation of these prior art techniques to form the present invention is highly creative, and is a crystallization of the inventors through many years of theoretical analysis and extensive experimentation. It will also be apparent to those skilled in the art from this disclosure that each of the embodiments disclosed herein, and any combination of features, can be incorporated into the present invention.
Claims (8)
1. A method for controlling gap between a rail elastic strip fastener and a seam is characterized in that: comprises that
Acquiring the torque change of a bolt or a screw of the rail elastic strip fastener;
judging whether the torque of the track elastic strip fastener bolt or screw changes suddenly;
if the torque of the track elastic strip fastener bolt or screw suddenly changes, the controller controls the main shaft of the motor to stop rotating and controls the main shaft of the motor to reversely rotate;
if the torque of the rail elastic strip fastener bolt or screw does not change suddenly, the controller controls the main shaft of the motor to continue rotating.
2. The method for controlling gap between the rail elastic strip fastener and the gap between the rail elastic strip fasteners as claimed in claim 1, wherein: the controller controls the main shaft of the motor to rotate reversely, so that the gap distance between the track elastic strip fastener and the track steel rail is 0-0.5 mm.
3. The method for controlling gap between the rail elastic strip fastener and the gap between the rail elastic strip fasteners as claimed in claim 1, wherein: the torque sensor collects the current torque value of the motor spindle in real time and transmits the current torque value to the controller.
4. The method for controlling gap between the rail elastic strip fastener and the gap between the rail elastic strip fasteners as claimed in claim 1, wherein: and the controller receives the torque value change rate measured by the torque sensor in real time and judges whether the currently measured torque value change rate changes suddenly.
5. The utility model provides a track bullet strip fastener gap control system that leaves which characterized in that includes:
a controller, a torque sensor and a motor;
the torque sensor and the motor are respectively connected with the controller;
the torque sensor is used for acquiring the current torque value of the main shaft of the motor;
the controller is used for executing the gap control method of the rail elastic strip fastener of claim 1.
6. The track spring bar fastener gap control system of claim 5, wherein: also includes a display; the display is electrically connected with the controller through a circuit and used for displaying the torque value of the track elastic strip fastener bolt or screw measured by the torque sensor.
7. The track spring bar fastener gap control system of claim 5, wherein: the torque sensor collects the current torque value of the motor in real time.
8. A computer readable storage medium having computer executable instructions embodied therein, which when executed by a controller, implement the method of controlling a gap between a track spring and a fastener gap according to claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318179.5A CN113062156A (en) | 2021-03-25 | 2021-03-25 | Rail elastic strip fastener gap control system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318179.5A CN113062156A (en) | 2021-03-25 | 2021-03-25 | Rail elastic strip fastener gap control system and control method thereof |
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| CN113062156A true CN113062156A (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110318179.5A Pending CN113062156A (en) | 2021-03-25 | 2021-03-25 | Rail elastic strip fastener gap control system and control method thereof |
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| CN (1) | CN113062156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117418425A (en) * | 2023-12-14 | 2024-01-19 | 河北铁达科技有限公司 | Intelligent rail fastener bolt operation robot and operation method thereof |
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| CN112025281A (en) * | 2020-08-31 | 2020-12-04 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Automatic robot tightening system and method for rail fastener |
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2021
- 2021-03-25 CN CN202110318179.5A patent/CN113062156A/en active Pending
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| GB1476441A (en) * | 1973-11-28 | 1977-06-16 | Plasser Bahnbaumasch Franz | Impact drive screw wrenches |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117418425A (en) * | 2023-12-14 | 2024-01-19 | 河北铁达科技有限公司 | Intelligent rail fastener bolt operation robot and operation method thereof |
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Application publication date: 20210702 |