CN202449551U - Chain tensioning system of scraper conveyor - Google Patents
Chain tensioning system of scraper conveyor Download PDFInfo
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- CN202449551U CN202449551U CN 201220044172 CN201220044172U CN202449551U CN 202449551 U CN202449551 U CN 202449551U CN 201220044172 CN201220044172 CN 201220044172 CN 201220044172 U CN201220044172 U CN 201220044172U CN 202449551 U CN202449551 U CN 202449551U
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Abstract
A chain tensioning system of a scraper conveyor comprises a retractable jack, an electric-hydraulic-control selector valve, at least two pressure sensors, a stroke sensor, a start-stop sensor, a controller and a power source. A cylinder of the retractable jack is fixedly arranged on a body of the scraper conveyor, a cylinder rod of the retractable jack is fixedly connected to a head or a tail of the scraper conveyor, one end of the electric-hydraulic-control selector valve is connected with a liquid inlet cylinder of the retractable jack, the other end of the electric-hydraulic-control selector valve is connected to a hydraulic liquid supply system of a working face, the pressure sensors are disposed on the electric-hydraulic-control selector valve, the stroke sensor is arranged on the cylinder rod of the retractable jack, the start-stop sensor is connected with the scraper conveyor, the controller is connected with the pressure sensors, the stroke sensor, the start-stop sensor and the retractable jack, and the power source is connected with the controller.
Description
Technical field
The utility model relates to a kind of scraper conveyer chain clamping system, relates in particular to a kind of chain tension system with dual pressure sensor.
Background technology
Slat conveyer is a kind of transmit machine very commonly used in the Coal Production.In current coal-face, the effect of slat conveyer is not only and is transported coal and material, but also is the orbit of coalcutter, so it becomes indispensable major equipment in the modernized coal winning technology.Slat conveyer can be kept in continuous operation, and produces and just can normally carry out.Otherwise whole coal-face will present end-of-life state, and whole production is interrupted.
The keystone configuration of various types of slat conveyers is identical with the parts of composition basically, and it is made up of three parts such as head, pars intermedia and drive end unit.In use, scraper plate is fixed on the chain, forms scraper chain as driving component.After the head driving section starts, drive the sprocket wheel rotation on the head axle, scraper chain circular flow drive material is moved, until arriving the chain-drive section unloading along the chute of pars intermedia.Scraper chain is walked around the stepless closed cycle operation of chain crop rotation, accomplishes the conveying of material.
Owing to adopt the scraper chain chain gear, the problem of adjustment chain tension degree is just arranged in the use of slat conveyer, generally move tensioning or loosen chain through telescopic oil cylinder driving head or tail.When chain is too loose, fall chain easily, jump chain, when chain was too tight, therefore then easy chain rupture accident, must make scraper conveyer chain remain in certain degree of tension, has made its normal operation.
In the prior art; The chain tension of slat conveyer is generally through artificial adjustment; Adjustment opportunity and degree of tension need be confirmed through the experience of technical personnel usually; Inaccurate and the adjustment of tensioning has a very big hysteresis quality, simultaneously also can't be according to the degree of tension of the adjusting chain of change dynamics such as load.
Summary of the invention
For addressing the above problem; The utility model proposes a kind of scraper conveyer chain clamping system; Comprise flexible jack, electric-hydraulic control reversing valve, at least two pressure sensors, stroke sensor, start-stop sensor, controller and power supplys; The cylinder body of said flexible jack is fixedly installed on the fuselage of said slat conveyer; The cylinder rod captive joint head or the tail of said flexible jack, said electric-hydraulic control reversing valve one end connects the feed liquor cylinder of said flexible jack, and the other end connects the hydraulic pressure liquid-supplying system of driving surface; Said pressure sensor is arranged on the said electric-hydraulic control reversing valve, is used to monitor the pressure of said feed liquor cylinder, and the function of each said pressure sensor is identical, and each pressure sensor is redundant each other; Said stroke sensor is arranged on the cylinder rod of said flexible jack, is used to monitor the overhang of said cylinder rod; Said start-stop sensor connects said slat conveyer, is used to monitor the start and stop state of said slat conveyer; Said controller connects said pressure sensor, stroke sensor, start-stop sensor and flexible jack, and the monitoring data that is used to gather said pressure sensor, stroke sensor, start-stop sensor is also according to said monitoring data analysis is driven said flexible jack; Said power supply connects said controller, is used for to said controller power supply.
Said stroke sensor comprises rodmeter and magnet ring, and said rodmeter is arranged in the said cylinder rod, and said magnet ring is around said cylinder rod setting.
Said controller comprises programmable controller.
The chain tension method of above-mentioned scraper conveyer chain clamping system comprises that controller monitors the pressure value that each pressure sensor transmits in real time, and carries out a kind of in following four kinds of actions according to pressure condition:
1. when the numerical value of each pressure sensor all meets or exceeds the upper pressure limit value of setting; The cylinder rod of the flexible jack of controller drives stretches out; Thereby make chain tension, the feed liquor cylinder pressure that causes flexible jack that stretches out of cylinder rod reduces, and the detected pressures of each pressure sensor reduces simultaneously; When being reduced to the goal pressure higher limit when following, the flexible jack of controller control stops action;
2. when the numerical value of each pressure sensor all meets or exceeds the low pressure limit value of setting; The cylinder rod withdrawal of the flexible jack of controller drives; Thereby chain is loosened, and the withdrawal of cylinder rod causes the feed liquor cylinder pressure of flexible jack to raise, and the detected pressures of each pressure sensor raises simultaneously; When being elevated to the goal pressure lower limit when above, the flexible jack of controller control stops action;
3. when the numerical value of each sensor is between upper pressure limit value and the low pressure limit value, do not carry out any action;
4. when the numerical value of each sensor did not belong to above-mentioned three kinds of situation, controller control scraper conveyer chain clamping system was out of service automatically;
In the process of carrying out above-mentioned four kinds of actions, controller is monitored the measurement numerical value of stroke sensor at any time, in case the measurement numerical value of stroke sensor surpasses pre-set threshold value, then the flexible jack of controller control stops action.
The advantage of the utility model is: the inverse feedback through sensor and flexible jack is realized the auto-tensioning of chain, and the each slack-free dynamics of assurance is swift in response, reliable in action, the uncertainty of having avoided artificial tensioning to bring; Use the redundant each other design of dual pressure sensor, make the operation of system more reliable, prevent the maloperation that sensor fault brings, avoid oil cylinder frequently flexible, thereby prolong the electric-hydraulic control reversing valve life-span.
Description of drawings
Accompanying drawing 1 is the electrical system architecture sketch of the said scraper conveyer chain clamping system of the utility model;
Accompanying drawing 2 is the hydraulic system structure figure of the said scraper conveyer chain clamping system of the utility model.
Reference numeral is following:
The 1-jack that stretches; The 2-cylinder body; The 3-cylinder rod; The 4-admission chamber; The 5-electric-hydraulic control reversing valve; 6-hydraulic pressure liquid-supplying system.
The specific embodiment
Referring to accompanying drawing 1-2, a kind of scraper conveyer chain clamping system comprises flexible jack, electric-hydraulic control reversing valve, two pressure sensors, stroke sensor, start-stop sensor, controller and power supplys.
Wherein the cylinder body of flexible jack is fixedly installed on the fuselage of slat conveyer; Preferably directly be wholely set with slat conveyer; The cylinder rod captive joint head or the tail of flexible jack; Convenience for installing and keeping in repair normally is connected on the tail, and the feed liquor cylinder of flexible jack connects the hydraulic pressure liquid-supplying system of driving surface through electric-hydraulic control reversing valve.Pressure sensor is arranged on the electric-hydraulic control reversing valve; Be used to monitor the pressure of feed liquor cylinder; The model of two pressure sensors is identical, and the function of its realization is also identical, and is redundant each other in whole clamping system; Avoid the use of single pressure sensor and when its fault, be not easy the problem in time found, be particularly suitable for down-hole etc. and require strict especially occasion to use safety problem; Stroke sensor is arranged on the cylinder rod of flexible jack; Be used to monitor the overhang of cylinder rod, preferred stroke sensor is the magnet ring type stroke sensor, comprises rodmeter and magnet ring; Rodmeter is arranged on the inside of cylinder rod; Along the axial setting of cylinder rod, magnet ring is around said cylinder rod setting, and promptly cylinder rod moves in the annular space of magnet ring; The start-stop sensor connects the control system of slat conveyer, is used to monitor the start and stop state of slat conveyer; Controller is preferably programmable controller; It connects pressure sensor, stroke sensor, start-stop sensor and flexible jack; The monitoring data of gathering pressure sensor, stroke sensor, start-stop sensor on the one hand is on the other hand according to monitoring data analysis being driven flexible jack; Power supply is the mine intrinsic safety explosion-proof electrical source, and it connects controller and supplies power to controller.
In actual moving process; Upper pressure limit value and lower limit, goal pressure higher limit and the goal pressure lower limit of at first in controller, importing suitable flexible jack according to the parameter and the required chain tension degree of slat conveyer, the magnitude relationship of each value is upper pressure limit value >=goal pressure higher limit＞goal pressure lower limit >=low pressure limit value.Chain is tight more; The pressure of the admission chamber of flexible jack is more little, and chain is more loose, and the pressure of the admission chamber of flexible jack is big more; The ultimate limit state that the corresponding chain of upper pressure limit value can loosen; The corresponding chain of low pressure limit value can slack-free ultimate limit state, and the range of pressure between goal pressure higher limit and the goal pressure lower limit is the pairing telescopic oil cylinder admission chamber of a preferred chain tension degree range of pressure, according to the parameter of flexible jack the threshold values of stroke sensor is set simultaneously and records in the controller; Threshold values is used to prevent the over stretch or the flexible jack of retraction infringement of cylinder rod; Controller detects the start-stop sensor status automatically through behind the power supply electrifying, after detecting the scraping transporter startup; The chain tension system controller is monitored the pressure value that each pressure sensor transmits in real time, and carries out a kind of in following four kinds of actions according to pressure condition:
1. when the numerical value of each pressure sensor all meets or exceeds the upper pressure limit value of setting; Too pine of chain is described, the cylinder rod of controller drives telescopic oil cylinder stretches out, thereby makes chain tension; The feed liquor cylinder pressure that causes telescopic oil cylinder that stretches out of cylinder rod reduces; The detected pressures of each pressure sensor reduces simultaneously, continues above-mentioned action and is reduced to the goal pressure higher limit when following up to pressure, explain that the pressure of the feed liquor cylinder of telescopic oil cylinder gets between the dominant area of presetting; The degree of tension that is chain gets into reasonable interval, and controller is controlled telescopic oil cylinder at this moment and stopped action;
2. when the numerical value of each pressure sensor all meets or exceeds the low pressure limit value of setting; Explain that chain is too tight, the cylinder rod withdrawal of controller drives telescopic oil cylinder, thus chain is loosened; The withdrawal of cylinder rod causes the feed liquor cylinder pressure of telescopic oil cylinder to raise; The detected pressures of each pressure sensor raises simultaneously, continues above-mentioned action and is elevated to the goal pressure lower limit when above up to pressure, explain that the pressure of the feed liquor cylinder of telescopic oil cylinder gets between the dominant area of presetting; The degree of tension that is chain gets into reasonable interval, and controller is controlled telescopic oil cylinder at this moment and stopped action;
3. when the numerical value of each sensor is between upper pressure limit value and the low pressure limit value, in the pressure that the feed liquor cylinder of telescopic oil cylinder is described is between preset dominant area or deviation not need not adjustment very much, do not carry out any action this moment;
4. when the numerical value of each sensor does not belong to above-mentioned three kinds of situation; Be higher than the upper pressure limit value and the pressure of another sensor is lower than the low pressure limit value like the pressure of some sensors; Perhaps the pressure controller of some sensors is between upper pressure limit value and the low pressure limit value and the pressure of another sensor is lower than the low pressure limit value or be higher than the upper pressure limit value; Explain that problem has appearred in certain pressure sensor; For preventing maloperation infringement telescopic oil cylinder even break chain, controller control scraper conveyer chain clamping system is out of service automatically, keeps existing situation and gives the alarm;
In the process of carrying out above-mentioned four kinds of actions; Under the in running order situation of controller; Controller is monitored the measurement numerical value of stroke sensor at any time, in case the measurement numerical value of stroke sensor surpasses pre-set threshold value, the flexible scope that has exceeded flexible jack is described; Might damage flexible jack, then the flexible jack of controller control stops action.
The above; Be merely the preferable specific embodiment of the utility model patent; But the protection domain of the utility model patent is not limited thereto; Any technical personnel of being familiar with the present technique field is in the technical scope that the utility model patent discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model patent.
Claims (3)
1. scraper conveyer chain clamping system is characterized in that: comprise flexible jack, electric-hydraulic control reversing valve, at least two pressure sensors, stroke sensor, start-stop sensor, controller and power supplys,
The cylinder body of said flexible jack is fixedly installed on the fuselage of said slat conveyer; The cylinder rod captive joint head or the tail of said flexible jack; Said electric-hydraulic control reversing valve one end connects the feed liquor cylinder of said flexible jack, and the other end connects the hydraulic pressure liquid-supplying system of driving surface;
Said pressure sensor is arranged on the said electric-hydraulic control reversing valve, is used to monitor the pressure of said feed liquor cylinder, and the model of each said pressure sensor is identical with function, and each pressure sensor is redundant each other;
Said stroke sensor is arranged on the cylinder rod of said flexible jack, is used to monitor the overhang of said cylinder rod;
Said start-stop sensor connects said slat conveyer, is used to monitor the start and stop state of said slat conveyer;
Said controller connects said pressure sensor, stroke sensor, start-stop sensor and flexible jack, and the monitoring data that is used to gather said pressure sensor, stroke sensor, start-stop sensor is also according to said monitoring data analysis is driven said flexible jack;
Said power supply connects said controller, is used for to said controller power supply.
2. scraper conveyer chain clamping system as claimed in claim 1 is characterized in that: said stroke sensor comprises rodmeter and magnet ring, and said rodmeter is arranged in the said cylinder rod, and said magnet ring is around said cylinder rod setting.
3. scraper conveyer chain clamping system as claimed in claim 1 is characterized in that: said controller comprises programmable controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220044172 CN202449551U (en) | 2012-02-13 | 2012-02-13 | Chain tensioning system of scraper conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220044172 CN202449551U (en) | 2012-02-13 | 2012-02-13 | Chain tensioning system of scraper conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202449551U true CN202449551U (en) | 2012-09-26 |
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ID=46865435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220044172 Expired - Lifetime CN202449551U (en) | 2012-02-13 | 2012-02-13 | Chain tensioning system of scraper conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202449551U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556603A (en) * | 2012-02-13 | 2012-07-11 | 北京天地玛珂电液控制系统有限公司 | Chain tensioning system of scraper conveyer |
| CN105059835A (en) * | 2015-07-17 | 2015-11-18 | 天地科技股份有限公司 | Chain tension automatic adjusting device of scraper conveyer |
| CN111285029A (en) * | 2020-03-20 | 2020-06-16 | 青岛中加特电气股份有限公司 | Control method of tail tensioning electromagnetic valve of scraper conveyor |
-
2012
- 2012-02-13 CN CN 201220044172 patent/CN202449551U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556603A (en) * | 2012-02-13 | 2012-07-11 | 北京天地玛珂电液控制系统有限公司 | Chain tensioning system of scraper conveyer |
| CN102556603B (en) * | 2012-02-13 | 2014-07-30 | 北京天地玛珂电液控制系统有限公司 | Chain tensioning system of scraper conveyer |
| CN105059835A (en) * | 2015-07-17 | 2015-11-18 | 天地科技股份有限公司 | Chain tension automatic adjusting device of scraper conveyer |
| CN111285029A (en) * | 2020-03-20 | 2020-06-16 | 青岛中加特电气股份有限公司 | Control method of tail tensioning electromagnetic valve of scraper conveyor |
| CN111285029B (en) * | 2020-03-20 | 2021-11-30 | 青岛中加特电气股份有限公司 | Control method of tail tensioning electromagnetic valve of scraper conveyor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
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| CX01 | Expiry of patent term |