CN115159023B - Scraper conveyor head and tail cushion frame height adjusting system and adjusting method - Google Patents
Scraper conveyor head and tail cushion frame height adjusting system and adjusting method Download PDFInfo
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- CN115159023B CN115159023B CN202210908966.XA CN202210908966A CN115159023B CN 115159023 B CN115159023 B CN 115159023B CN 202210908966 A CN202210908966 A CN 202210908966A CN 115159023 B CN115159023 B CN 115159023B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G41/00—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames
- B65G41/001—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames with the conveyor adjustably mounted on the supporting frame or base
- B65G41/003—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames with the conveyor adjustably mounted on the supporting frame or base mounted for linear movement only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
- E21F13/066—Scraper chain conveyors
- E21F13/068—Special adaptations for use at the junction of the working face with the gallery, e.g. driving stations coupled to the driving station of the winning machine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a scraper conveyor head and tail cushion frame height adjusting system and method, comprising an underground centralized control center, a working face data detecting element, a cushion frame controller, a cushion frame data detecting element and a cushion frame hydraulic driving system, wherein the working face data detecting element is electrically connected with the underground centralized control center, the cushion frame data detecting element comprises a jack pressure sensor and a jack displacement sensor, the jack pressure sensor is used for detecting the pressure value of a rodless cavity of a telescopic jack, and the jack displacement sensor is used for detecting the extension stroke of the telescopic jack; the pad frame data detection element is electrically connected with the pad frame controller and is used for transmitting pad frame state data to the pad frame controller, the pad frame controller is electrically connected with the underground centralized control center and the pad frame hydraulic driving system respectively and is used for controlling the pad frame hydraulic driving system to adjust the height of the pad frame according to the underground centralized control center transmission data and the pad frame state data, and the pad frame data detection device has the characteristics of accurate height adjustment, high automation degree and good safety.
Description
Technical Field
The invention relates to the technical field of coal mine machinery, in particular to a system and a method for adjusting the height of a head and tail cushion frame of a scraper conveyor.
Background
At present, the cutting holes of the fully mechanized mining working face of the thin coal seam in China are generally arranged according to the thickness of the coal seam, the heights of two crossheads are higher, a mode of breaking the bottom along the top is adopted when the crossheads are excavated, namely, the top plate of the crossheads is flush with the top plate of the working face, the bottom plate of the crossheads is lower than the bottom plate of the working face, and steps exist between the bottom plate of the crossheads and the bottom plate of the working face, so that the head and tail parts of the scraper conveyor are suspended in the crossheads. In order to ensure the safety and reliability of the conveyor, a cushion frame is arranged below the head and the tail of the conveyor respectively so as to realize the support and pushing of the head and the tail of the conveyor. Due to fluctuation of the trend of the crossheading, mine pressure display, change of the coal seam thickness of the working face and the like, the step height between the working face and the two crossheads is changed continuously, and a set of equipment can be applied to a plurality of working faces sometimes, so that the heights of the pad frames arranged under the head and the tail of the conveyor can be adjusted in a large range to adapt to the continuously changed step height.
In the prior art, a plurality of layers of pull type cushion frames are used, a plurality of layers of cushion frames are arranged, and when the step height between a working surface and a crossheading is increased/decreased, the whole height of the cushion frames is adjusted by increasing/decreasing the layer number of the cushion frames, so that the head and tail of a conveyor are effectively supported. Because the pad rack is heavier, in a narrow underground operation space, the support adjusting mode has the problems of discontinuous adjusting height, inconvenient operation, low replacement efficiency, high labor intensity, high potential safety hazard and the like.
The invention patent application document of China with the application number of 201810118673.5 discloses a two-end cushion frame of a conveyor and mobile equipment, wherein the two-end cushion frame of the conveyor comprises a pushing bottom plate, a lifting platform and a lifting oil cylinder, the lifting platform is connected with a machine head and a machine tail of the conveyor by adopting pin shafts, two ends of the lifting oil cylinder are respectively connected with the pushing bottom plate and the lifting platform, a first inserting shaft and a second inserting shaft which are used for ensuring the lifting platform to vertically lift are arranged between the pushing bottom plate and the lifting platform, and the lifting platform moves up and down through the telescopic action of the lifting oil cylinder; the technical scheme can solve the problems of discontinuous height adjustment, low replacement efficiency, high labor intensity and high potential safety hazard of the multilayer pad frame, but because the lifting oil cylinder and the first and second plug-in shafts are vertically arranged and are limited by the height of the first and second plug-in shafts and the stroke of the lifting oil cylinder, the technical scheme has the problems of small height adjustable range and large minimum height, and the pad frame is easy to interfere with steps between the working face and the gate way when the working face of the conveyor is in upward and downward sliding, so that the underground use of the lifting oil cylinder is greatly limited.
Aiming at the problems, the Chinese invention application document with the application number of CN202110734630.1 discloses an adjustable pad frame for the head and tail of a coal mine thin coal seam fully-mechanized coal mining face conveyor, which comprises a bottom plate, a guide plate, a telescopic jack and a supporting platform, wherein the supporting platform with a groove shape is used for movably lapping with the head and the tail, so that the height of the pad frame can be greatly reduced, the height adjusting range can be effectively enlarged, the head and the tail of the conveyor can slide on the supporting platform of the pad frame, and the problem that the pad frame interferes with steps between the working face and a cis trough is effectively avoided. However, in the prior art, when the cushion frame is used for supporting the machine head and the machine tail of the conveyor, the height of the machine head and the machine tail of the conveyor is generally controlled manually, and the machine head and the machine tail are not regulated accurately enough, and the machine head and the machine tail have a certain survey and operation risk and are not beneficial to ensuring personal safety.
Disclosure of Invention
The invention aims to provide a scraper conveyor head and tail cushion frame height adjusting system, which can solve the technical problems of inaccurate adjustment and high personal safety risk of manual cushion frame height adjustment in the prior art;
the invention further aims to provide a method for adjusting the height of the head and tail cushion frame of the scraper conveyor, which can solve the technical problems of inaccurate adjustment and high personal safety risk of manual cushion frame adjustment in the prior art.
The invention provides a scraper conveyor head and tail cushion frame height adjusting system, which provides the following technical scheme: the utility model provides a scraper conveyor aircraft nose tail pad frame height adjustment system, including underground centralized control center, working face data detection element, pad frame controller, pad frame data detection element, pad frame hydraulic drive system, working face data detection element is connected with underground centralized control center electricity, be used for to the transmission real-time working data of underground centralized control center, pad frame data detection element includes jack pressure sensor and jack displacement sensor, flexible jack piston rod in the pad frame stretches out upwards and vertical lift, jack pressure sensor installs in flexible jack rodless chamber, be used for detecting flexible jack rodless chamber pressure value, jack displacement sensor installs in flexible jack rodless chamber bottom, be used for detecting flexible jack's extension stroke; the pad frame data detection element is electrically connected with the pad frame controller and used for transmitting pad frame state data to the pad frame controller, and the pad frame controller is electrically connected with the underground centralized control center and the pad frame hydraulic driving system respectively and used for controlling the pad frame hydraulic driving system to adjust the height of the pad frame according to the underground centralized control center transmission data and the pad frame state data.
Further, the working face data detection element mainly comprises a working face support detection element, an end support detection element and a coal cutter detection element, wherein the working face support detection element comprises a working face support top frame inclination sensor, a working face support connecting rod inclination sensor and a working face support base inclination sensor, the end support detection element comprises an end support top frame inclination sensor, an end support connecting rod inclination sensor and an end support base inclination sensor, the coal cutter detection element comprises a coal cutter body inclination sensor and a coal cutter rocker arm inclination sensor, and when the underground centralized control center is used, the working face support height, the end support height and the coal cutter cylinder bedding amount are respectively calculated according to collected data of the working face support detection element, the end support detection element and the coal cutter detection element.
The beneficial effects are that: in the scraper conveyor head and tail pad frame height adjusting system, the pad frame controller is connected with the underground centralized control center through signals, the underground centralized control center can respectively detect and calculate the working face support height, the end support height and the coal cutter roller bedding amount through the working face data detection element, the pad frame controller receives the data transmitted by the underground centralized control center signals and simultaneously receives the pad frame data detection element detection data, and the pad frame hydraulic driving system controls the telescopic jack to stretch and retract to enable the pad frame height to be matched with the working face and the roadway step height, so that the scraper conveyor head and tail pad frame height automatic adjusting function is realized, the working unmanned process of the thin coal seam working face is facilitated to be propelled, and the personal adjusting operation risk is greatly reduced or even eliminated. According to the invention, the detection element is used for comprehensively collecting working data, the pad frame controller continuously receives the pad frame state data in the height adjustment process and dynamically adjusts the height of the pad frame, so that a more accurate adjustment effect can be achieved, and the technical problems of inaccurate adjustment and high personal safety risk in the manual adjustment of the height of the pad frame in the prior art can be solved by the scraper conveyor head and tail pad frame height adjustment system.
The invention provides a method for adjusting the height of a scraper conveyor head and tail cushion frame, which comprises the following steps:
s1: the underground centralized control center calculates the working face support height, the end support height and the coal cutter roller bedding amount according to the data acquired by the working face data detection element, wherein the coal cutter roller bedding amount is positive when the lower edge of the coal cutter roller is positioned on the lower side of the working face bottom plate, and the coal cutter roller bedding amount is negative when the lower edge of the coal cutter roller is positioned on the upper side of the working face bottom plate;
s2: the underground centralized control center calculates the heights of the working face and the roadway steps at the placement position of the pad frame according to the heights of the working face brackets, the heights of the end brackets and the horizontal bottoms of the drums of the coal mining machine, and transmits the heights of the working face and the roadway steps at the placement position of the pad frame to the pad frame controller, wherein: working face and roadway step height at the pad frame placement position=end frame height-working face frame height-coal cutter drum bedding amount;
s3: the pad frame controller compares the height of the working surface of the pad frame placement position with the height of the roadway step with the maximum height and the minimum height of the pad frame, when the maximum height of the pad frame is larger than or equal to the minimum height of the working surface of the pad frame placement position and the height of the roadway step is larger than or equal to the minimum height of the pad frame, the pad frame controller controls the telescopic jack to stretch out and draw back through the pad frame hydraulic driving system so that the height of the pad frame is matched with the step between the working surface and the roadway, and when the height of the working surface of the pad frame placement position and the height of the roadway step are smaller than the minimum height of the pad frame or larger than the maximum height of the pad frame, the adjustment of the height of the pad frame is stopped and the warning is carried out.
Further, the detailed process of controlling the telescopic jack to stretch and retract and enabling the height of the pad frame and the steps between the working face and the roadway to be matched by the pad frame controller in the step S3 is as follows: the cushion frame controller receives the pressure value of the rodless cavity of the telescopic jack and the extending stroke of the telescopic jack, firstly controls the telescopic jack to stretch and retract to enable the cushion frame to be high to the working surface of the placement position of the cushion frame and the height of a roadway step, then adjusts the telescopic jack, and controls the cushion frame hydraulic driving system to lock liquid inlet and liquid return of the telescopic jack when the sum of the pressure values of the rodless cavity of the telescopic jack is equal to the weight of a headstock or a tailstock and the pressure values of the rodless cavity of the telescopic jack are equal.
The beneficial effects are that: according to the method for adjusting the height of the head and tail cushion frame of the scraper conveyor, an adjusting range judging step is arranged before actual adjustment, when the maximum height of the cushion frame is larger than or equal to the minimum height of a working surface of a cushion frame placement position and a roadway step height is larger than or equal to the minimum height of the cushion frame, the working surface of the cushion frame placement position and the roadway step height exceed the adjustable range of the cushion frame, warning is needed, and the head and tail of the conveyor are prevented from being lifted in a suspended mode to cause damage of the conveyor. When the working surface of the pad frame placement position and the height of the roadway steps are positioned in the adjustable range of the pad frame, a calculation formula is adopted to accurately calculate the theoretical value of the working surface of the pad frame placement position and the height of the roadway steps, the height of the pad frame is enabled to reach the theoretical value of the step height quickly by the telescopic jack, then the telescopic jack is finely adjusted, when the sum of the pressure values of rodless cavities of the telescopic jacks is equal to the weight of a headstock or a tailstock and the pressure values of rodless cavities of the telescopic jacks are equal, a hydraulic driving system of the pad frame is controlled to lock liquid inlet and liquid return of the telescopic jack, and at the moment, the pad frame can be enabled to ensure the level of a scraper conveyor on the basis of horizontal stable support; therefore, the invention can ensure accuracy and faster adjusting speed on the basis of realizing automatic adjustment according to the thought of firstly and quickly adjusting the height of the pad frame to a theoretical value and then dynamically and slightly adjusting according to the actual force balance condition, and can solve the technical problems of inaccurate adjustment and high personal safety risk in the manual adjustment of the height of the pad frame in the prior art.
Drawings
FIG. 1 is a control schematic diagram of a specific embodiment 1 of a scraper conveyor nose and tail pad height adjustment system of the present invention;
FIG. 2 is a schematic view of a partial structure of a roadway and a working surface in a height adjustment method of a head and tail pad frame of a scraper conveyor according to the present invention;
reference numerals: h1-end support height; h2-working face support height; h3-the height of the working surface of the placement position of the pad rack and the roadway step; a-the bottom lying amount of a roller of the coal mining machine; 1-end bracket; 2-working face support.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention relates to a concrete embodiment 1 of a scraper conveyor head and tail cushion frame height adjusting system, which comprises the following components:
the scraper conveyor head and tail cushion frame height adjusting system comprises an underground centralized control center, a working face data detection element, a cushion frame controller, a cushion frame data detection element and a cushion frame hydraulic driving system, wherein the working face data detection element is electrically connected with the underground centralized control center and used for collecting and transmitting real-time working data to the underground centralized control center and providing a data basis for the underground centralized control center to analyze and calculate the height of a working face and a roadway step at the placement position of the cushion frame.
The working face data detection element mainly comprises a working face support detection element, an end support detection element and a coal mining machine detection element, and is used for detecting the height of the working face support detection element, the height of the end support and the horizontal bottom quantity of a roller of the coal mining machine respectively. The working face support top frame inclination angle sensor, the working face support base inclination angle sensor and the working face support connecting rod inclination angle sensor are respectively arranged on the working face support top frame, the working face support base and the working face support connecting rod, and the underground centralized control center can analyze and calculate the working face support height according to the working face support detection element collected data. The end support is located in the roadway and generally comprises a top frame, a base and a connecting rod connected between the top frame and the base, wherein the end support detecting element comprises an end support top frame inclination sensor arranged on the end support top frame, an end support connecting rod inclination sensor arranged on the end support connecting rod, and an end support base inclination sensor arranged on the end support base, and the underground centralized control center can analyze and calculate the height of the top frame according to data acquired by the end support detecting element. The coal cutter detection element mainly comprises a coal cutter body inclination sensor and a coal cutter rocker arm inclination sensor, wherein the coal cutter body inclination sensor is positioned on the coal cutter body, the coal cutter rocker arm inclination sensor is positioned on the coal cutter rocker arm, and the underground centralized control center can calculate the horizontal bottom quantity of the coal cutter drum according to the data collected by the coal cutter detection element and the outer diameter value of the coal cutter drum. The method for calculating the height of the top frame support, the height of the working face support and the horizontal bottom quantity of the drum of the coal mining machine according to the data acquisition and the underground centralized control center is the prior art, and is already applied to the technical field of coal mines at present and will not be repeated.
The pad frame data detection element is electrically connected with the pad frame controller and is used for detecting and transmitting pad frame state data to the pad frame controller. The pad frame data detection element comprises a jack pressure sensor and a jack displacement sensor, and the adjustable pad frame is generally applied to a pad frame with a telescopic jack piston rod extending upwards and lifting vertically, such as an adjustable pad frame for the head and tail of a coal mine thin coal seam fully-mechanized coal face conveyor disclosed in Chinese patent application document with the application number of CN 202110734630.1. The jack pressure sensor is arranged in the rodless cavity of the telescopic jack and used for detecting the pressure value of the rodless cavity of the telescopic jack, and the jack displacement sensor is arranged at the bottom of the rodless cavity of the telescopic jack and used for detecting the extension stroke of the telescopic jack. The pad frame controller is respectively and electrically connected with the underground centralized control center, the pad frame hydraulic driving system and the alarm, and in the process of adjusting the height of the pad frame by using the pad frame controller, the pad frame controller controls the pad frame hydraulic driving system to adjust the height of the pad frame according to the transmission data of the underground centralized control center and the status data of the pad frame.
By integrating the structure, the scraper conveyor head and tail cushion frame height adjusting system provides a device foundation for realizing automatic cushion frame height adjustment, and the cushion frame height is dynamically adjusted by detecting the working face support height, the end support height, the horizontal bottom quantity of the roller of the coal mining machine, the rodless cavity pressure value of the telescopic jack and the extending stroke of the telescopic jack, so that the automatic degree is high, the personal safety risk is reduced or even eliminated, the adjusting effect is more accurate, and the technical problems of inaccurate adjustment and high personal safety risk existing in the manual cushion frame height adjustment in the prior art can be solved.
Based on the scraper conveyor head and tail pad frame height adjusting system, the invention provides a scraper conveyor head and tail pad frame height adjusting method, which is not limited to the scraper conveyor head and tail pad frame height adjusting system:
s1: the underground centralized control center calculates the working face support height H2, the end support height H1 and the coal cutter roller bedding amount A according to the data acquired by the working face data detection element, wherein the coal cutter roller bedding amount is positive when the lower edge of the coal cutter roller is positioned on the lower side of the working face bottom plate, and the coal cutter roller bedding amount is negative when the lower edge of the coal cutter roller is positioned on the upper side of the working face bottom plate;
s2: the underground centralized control center calculates the working face of the pad frame placement and the roadway step height H3 according to the working face support height H2, the end support height H1 and the coal cutter roller bedding amount A and transmits the working face of the pad frame placement and the roadway step height H3 to the pad frame controller, wherein: as shown in fig. 2, the end support 1 is placed at a roadway, the working face support 2 is placed at a working face, the working face and roadway step height h3=the end support height H1-the working face support height H2-the coal cutter drum bedding amount a;
s3: the pad frame controller compares the height of a working surface at the pad frame placement position with the maximum height and the minimum height of the pad frame, when the maximum height of the pad frame is larger than or equal to the maximum height of the pad frame placement position and the height H3 of the roadway is larger than or equal to the minimum height of the pad frame, the pad frame controller controls the telescopic jack to stretch out and draw back through the pad frame hydraulic driving system so as to enable the height of the pad frame to be matched with the step between the working surface and the roadway, the pad frame controller receives the stretching travel of the telescopic jack without rod cavity, firstly controls the telescopic jack to stretch out and draw back, enables the height of the pad frame to be quickly stretched to the height of the pad frame placement position with the maximum height of the roadway, then adjusts the telescopic jack in a small range, and locks liquid inlets and liquid returns of the telescopic jack when the sum of the pressure values of the telescopic jack without rod cavity is equal to the weight of a headstock or a tailstock; when the working surface of the placement position of the pad frame and the roadway step height H3 are smaller than the minimum height of the pad frame or larger than the maximum height of the pad frame, the adjustment of the height of the pad frame is stopped and the warning is carried out through the alarm.
It is worth mentioning that the weight of the head frame and the weight of the tail frame in the above steps are fixed values, and the weight of the coal falling on the head frame and the tail frame is ignored.
By combining the steps, the invention provides a method for adjusting the height of a head and tail cushion frame of a scraper conveyor, which comprises the following steps: the theoretical value of the working surface of the placement position of the cushion frame and the height of the roadway steps is calculated through a reasonable calculation method, an adjustment range comparison step is arranged before the step of adjusting the height, and when the step height is judged to exceed the adjustment range of the cushion frame, the adjustment is timely alarmed and stopped, the damage of the conveyor caused by the suspension lifting of the head/tail of the conveyor is prevented, the safety of equipment is fully ensured, and the operation safety is improved. When the step height is determined to be positioned in the adjusting range of the pad frame, the jack is quickly stretched according to the theoretical value of the step height, then the jack is finely adjusted according to the pressure value of the jack, the theoretical value error is eliminated by enabling the pressure value of the jack to be equal to the weight of the headstock or the tailstock, the force balance is realized, the adjusting speed is high, the adjusting accuracy is ensured, and the technical problems of inaccurate adjustment and high personal safety risk in the prior art of manual adjustment of the height of the pad frame can be solved.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (3)
1. The utility model provides a scraper conveyor aircraft nose tail pad frame height adjustment system, which is characterized by, including underground centralized control center, working face data detection element, the pad frame controller, pad frame data detection element, pad frame hydraulic drive system, working face data detection element is connected with underground centralized control center electricity, be used for to the transmission real-time working data of underground centralized control center, pad frame data detection element includes jack pressure sensor and jack displacement sensor, flexible jack piston rod stretches out upwards and vertical lift in the pad frame, jack pressure sensor installs in flexible jack rodless chamber, be used for detecting flexible jack rodless chamber pressure value, jack displacement sensor installs in flexible jack rodless chamber bottom, be used for detecting flexible jack's extension stroke; the pad frame data detection element is electrically connected with the pad frame controller and used for transmitting pad frame state data to the pad frame controller, and the pad frame controller is electrically connected with the underground centralized control center and the pad frame hydraulic driving system respectively and used for controlling the pad frame hydraulic driving system to adjust the height of the pad frame according to the data transmitted by the underground centralized control center and the pad frame state data;
the working face data detection element mainly comprises a working face support detection element, an end support detection element and a coal cutter detection element, wherein the working face support detection element comprises a working face support top frame inclination sensor, a working face support connecting rod inclination sensor and a working face support base inclination sensor, the end support detection element comprises an end support top frame inclination sensor, an end support connecting rod inclination sensor and an end support base inclination sensor, the coal cutter detection element comprises a coal cutter body inclination sensor and a coal cutter rocker arm inclination sensor, and when in use, an underground centralized control center respectively analyzes and calculates the working face support height, the end support height and the coal cutter roller horizontal bottom amount according to the acquired data of the working face support detection element, the end support detection element and the coal cutter detection element.
2. A scraper conveyor head and tail cushion height adjusting method based on the scraper conveyor head and tail cushion height adjusting system of claim 1, which is characterized by comprising the following steps:
s1: the underground centralized control center calculates the working face support height, the end support height and the coal cutter roller bedding amount according to the data acquired by the working face data detection element, wherein the coal cutter roller bedding amount is positive when the lower edge of the coal cutter roller is positioned on the lower side of the working face bottom plate, and the coal cutter roller bedding amount is negative when the lower edge of the coal cutter roller is positioned on the upper side of the working face bottom plate;
s2: the underground centralized control center calculates the heights of the working face and the roadway steps at the placement position of the pad frame according to the heights of the working face brackets, the heights of the end brackets and the horizontal bottoms of the drums of the coal mining machine, and transmits the heights of the working face and the roadway steps at the placement position of the pad frame to the pad frame controller, wherein: working face and roadway step height at the pad frame placement position=end frame height-working face frame height-coal cutter drum bedding amount;
s3: the pad frame controller compares the height of the working surface of the pad frame placement position with the height of the roadway step with the maximum height and the minimum height of the pad frame, when the maximum height of the pad frame is larger than or equal to the minimum height of the working surface of the pad frame placement position and the height of the roadway step is larger than or equal to the minimum height of the pad frame, the pad frame controller controls the telescopic jack to stretch out and draw back through the pad frame hydraulic driving system so that the height of the pad frame is matched with the step between the working surface and the roadway, and when the height of the working surface of the pad frame placement position and the height of the roadway step are smaller than the minimum height of the pad frame or larger than the maximum height of the pad frame, the adjustment of the height of the pad frame is stopped and the warning is carried out.
3. The method for adjusting the height of a head and tail cushion frame of a scraper conveyor according to claim 2, wherein the detailed process of controlling the telescopic jack to stretch and retract and enabling the cushion frame height and the step between a working surface and a roadway to be matched by the cushion frame controller in the step S3 is as follows: the cushion frame controller receives the pressure value of the rodless cavity of the telescopic jack and the extending stroke of the telescopic jack, firstly controls the telescopic jack to stretch and retract to enable the cushion frame to be high to the working surface of the placement position of the cushion frame and the height of a roadway step, then adjusts the telescopic jack, and controls the cushion frame hydraulic driving system to lock liquid inlet and liquid return of the telescopic jack when the sum of the pressure values of the rodless cavity of the telescopic jack is equal to the weight of a headstock or a tailstock and the pressure values of the rodless cavity of the telescopic jack are equal.
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| CN105221178A (en) * | 2015-08-28 | 2016-01-06 | 冀中能源股份有限公司邢东矿 | Electrichydraulic control waste filling mining hydraulic bracket and Research on Automatic Filling thereof |
| CN113217068A (en) * | 2021-04-28 | 2021-08-06 | 太原理工大学 | Working face detection device, method, terminal and storage medium |
| CN113389583A (en) * | 2021-06-30 | 2021-09-14 | 郑州煤矿机械集团股份有限公司 | Bottom-cleaning-free self-moving type roof protecting system of air return roadway of fully-mechanized mining working surface of coal mine thin seam |
| CN216888546U (en) * | 2021-08-31 | 2022-07-05 | 郑州煤矿机械集团股份有限公司 | Scraper tail adjustable cushion frame with supporting function |
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