Automatic guarantee system and method for safe ventilation distance between fully-mechanized excavation face air supply cylinder and head-on

Abstract

The invention relates to a system and a method for automatically guaranteeing the safe ventilation distance between an air supply cylinder and a head-on of a fully-mechanized excavation face. The system comprises a telescopic air cylinder, a positive pressure air cylinder, the air supply cylinder, a hydraulic prop, a sliding rail and a self-moving track platform. The sliding rail is supported by the hydraulic supporting column and arranged on one side of a head-on coal wall, the air supply barrel and the telescopic air barrel are sequentially connected in series and are hung on the sliding block, and the sliding block moves along the sliding rail to achieve position adjustment of the air barrels. A hydraulic oil cylinder is arranged on the crawler platform and fixedly connected with the connecting rod, the air supply barrel is driven by the crawler platform to move along the sliding rail, and the safe ventilation distance is guaranteed. The system is provided with a laser radar ranging device, a hydraulic pump station and a control system, the distance between the air duct and the head-on, the position of a crawler platform and the height of the air duct can be automatically measured, a crawler walking device, a hydraulic supporting column and an oil cylinder are controlled to be accurately adjusted according to data, and it is ensured that the distance between an air outlet of the air duct and the head-on is always kept within the range of 5-10 m. The ventilation dilution gas and dust removal efficiency is improved by more than or equal to 80% through an automatic adjustment mechanism, the labor intensity and the labor cost are reduced, the operation stability and adaptability of the system are enhanced, and remarkable safety benefits and economic values are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine ventilation and dust removal, and relates to a system and method for automatically ensuring the safe ventilation distance between an air supply duct and a front face of a fully mechanized excavation face. Background Art

[0002] In the process of development and excavation of coal mine face, air supply duct is a necessary facility for local ventilation and dilution of head gas and ventilation and dust removal of the face. Whether the distance between the air supply duct outlet and the head safety ventilation of the face can be kept within a reasonable range is the key to directly affect the effect of ventilation and dilution of head gas and ventilation and dust removal. Studies have shown that when the air supply duct outlet of the face safety ventilation is kept within the standard range of 5-10m, the needs of local ventilation and dilution of head gas and ventilation and dust removal of the face can be met, and the ventilation and dilution of gas and ventilation and dust removal efficiency are ≥80%. Compared with the traditional method of about 60%, the ventilation and dilution of gas and ventilation and dust removal efficiency is increased by more than 20%. At present, the control method of the distance L between the air supply duct outlet and the head safety ventilation of the face is generally carried out by 3-4 people regularly pulling, which has problems such as high labor cost, high labor intensity, difficulty in ensuring the standard range value L, and low ventilation and dilution of head gas and ventilation and dust removal efficiency. The ventilation and dilution of gas and ventilation and dust removal efficiency is generally ≤60%. Summary of the invention

[0003] In view of this, the purpose of the present invention is to solve the above-mentioned problems and to provide a system and method for automatically ensuring the safe ventilation distance between the air supply duct and the head of the comprehensive excavation face, which can monitor and automatically adjust the safe ventilation distance between the air supply duct and the head in real time, ensure that the efficiency of ventilation gas dilution and ventilation dust removal reaches the expected standards, reduce labor costs and improve operational safety.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] An automatic guarantee system for the safe ventilation distance between the air supply duct and the head of a fully mechanized excavation face, comprising a telescopic air duct, a positive pressure air duct, an air supply duct, a hydraulic support, a slide rail, and a self-moving crawler platform;

[0006] The two ends of the slide rail are supported by hydraulic struts and are arranged on one side of the head coal wall. A plurality of slide blocks are arranged on the slide rail. The positive pressure air cylinder, telescopic air cylinder and air supply cylinder are connected in series in sequence and hoisted on the slide block. The slide blocks hoisting the telescopic air cylinder are connected by a connecting chain, and the slide blocks hoisting the air supply cylinder are fixedly connected by a connecting rod.

[0007] The self-moving crawler platform is arranged below the air supply cylinder. Hydraulic cylinders are fixedly provided at both ends of the self-moving crawler platform. The hydraulic cylinders are fixedly connected to connecting rods. When the self-moving crawler platform moves along the length direction of the slide rail, the hydraulic cylinders drive the air supply cylinder to move along the slide rail through the connecting rod, thereby adjusting the safe ventilation distance of the air supply cylinder from the front.

[0008] Furthermore, the self-propelled crawler platform includes a crawler walking device, a control system, and a laser radar. The hydraulic cylinder is fixed at both ends of the crawler walking device; a plurality of laser radars are provided on the crawler walking device, which are respectively used to measure the distance between the air outlet of the air supply duct and the head-on safe ventilation, the distance between the crawler walking device and the two sides of the tunnel, and the height of the air supply duct; the control system controls the movement of the crawler walking device, the hydraulic support and the hydraulic cylinder according to the laser radar measurement data.

[0009] Furthermore, the crawler walking device is provided with a hydraulic pump station and a cable retracting device, and the hydraulic support, hydraulic cylinder and crawler walking device are all powered by the hydraulic pump station; the cable retracting device is used to retract and release the connecting cables during movement.

[0010] Furthermore, the hydraulic cylinder is equipped with a displacement sensor for real-time monitoring of the extension and retraction distance of the cylinder, and the control device controls each hydraulic cylinder independently or in linkage.

[0011] Furthermore, a hydraulic locking device is provided at the top end of the hydraulic cylinder, and the hydraulic cylinder and the slide rail are locked by the hydraulic locking device.

[0012] Furthermore, a wind tube storage device is provided below the slide rail; the telescopic wind tube is arranged in the wind tube storage device, and is extended and retracted in length when driven by the self-moving crawler platform.

[0013] A method for automatically ensuring the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face adopts the above-mentioned automatic system for ensuring the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face; a laser radar is used to monitor the distance between the air supply duct and the front in real time, and the control system adjusts the crawler walking device according to the data to drive the hydraulic cylinder to synchronously move the air supply duct to ensure that the distance between the air supply duct and the front is maintained within 5 to 10 meters.

[0014] Furthermore, when it is necessary to adjust the distance between the crawler walking device and the two sides of the tunnel, the control system controls the lower end of the hydraulic support to be retracted, and the air supply tube and the slide rail are supported on the self-moving crawler platform through the hydraulic cylinder. The laser radar detects the distance between the crawler device and the two sides of the tunnel. The control system automatically adjusts the position of the crawler walking device according to the measurement results, and then controls the hydraulic support to extend, and the fixed slide rail is supported by the hydraulic support.

[0015] Furthermore, when the height of the air supply duct needs to be adjusted, the control system adjusts the hydraulic support to achieve height adjustment based on the height data of the air supply duct measured by the laser radar.

[0016] The beneficial effects of the present invention are:

[0017] 1) The present invention uses a laser radar distance measurement and control system, and the system can monitor and control the ventilation distance between the wind tube and the front, the height of the air supply tube, and the distance between the crawler device and the two sides of the tunnel in real time. After the data is fed back to the control system, the crawler walking device and the hydraulic cylinder can quickly complete the adjustment to ensure that the safe ventilation distance is always stable within a reasonable range.

[0018] 2) The automation system effectively reduces the risk of human operational errors, reduces manpower input and frequent equipment losses, thereby reducing the operating costs of coal mining enterprises and improving overall economic benefits.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a schematic diagram of the automatic guarantee system for the safe ventilation distance between the air supply duct of the comprehensive excavation face and the head in the present invention.

[0022] Figure markings: 1-air supply duct; 2-slide rail; 3-slider; 4-connecting rod; 5-telescopic air duct; 6-positive pressure air duct; 7-hydraulic support; 8-hydraulic support; 9-connecting chain; 10-hydraulic cylinder; 11-hydraulic cylinder; 12-hydraulic locking device; 13-hydraulic pump station; 14-cable retracting device; 15-control system; 16-laser radar; 17-laser radar; 18-laser radar; 19-crawler walking device. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] See also Figure 1 , which is an automatic guarantee system for the safe ventilation distance between the air supply duct and the head of the comprehensive excavation face, comprising a telescopic air duct 5, a positive pressure air duct 6, an air supply duct 1, a hydraulic support 7, a hydraulic support 8, a slide rail 2, and a self-moving crawler platform;

[0027] The two ends of the slide rail 2 are supported by hydraulic struts 7 and 8 and are arranged on one side of the head coal wall. A plurality of slide blocks 3 are arranged on the slide rail 2; the positive pressure air cylinder 6, the telescopic air cylinder 5, and the air supply cylinder 1 are connected in series in sequence and hoisted on the slide blocks 3; the slide blocks 3 hoisting the telescopic air cylinder 5 are connected by a connecting chain 9, and the slide blocks 3 hoisting the air supply cylinder 1 are fixedly connected by a connecting rod 4;

[0028] The self-moving crawler platform is arranged below the air supply cylinder 1, and hydraulic cylinders 10 and hydraulic cylinders 11 are fixedly arranged at both ends of the self-moving crawler platform, and the hydraulic cylinders 10 and hydraulic cylinders 11 are respectively fixedly connected to the connecting rod 4. When the self-moving crawler platform moves along the length direction of the slide rail 2, the hydraulic cylinders 10 and hydraulic cylinders 11 drive the air supply cylinder 1 to move along the slide rail 2 through the connecting rod 4, thereby adjusting the safe ventilation distance of the air supply cylinder 1 from the head.

[0029] The self-propelled crawler platform includes a crawler walking device 19, a control system 15, and a laser radar. The hydraulic cylinders are fixedly arranged at both ends of the crawler walking device 19; the crawler walking device 19 is provided with a laser radar 16, a laser radar 17, and a laser radar 18. The laser radar can rotate 360°. The laser radar 16, the laser radar 17, and the laser radar 18 are respectively used to measure the safe ventilation distance L from the air outlet of the air supply duct 1 to the head, the distance from the crawler walking device 19 to the two sides of the tunnel, and the height of the air supply duct 1; the control system 15 adopts PLC programming to control the crawler walking device 19, the hydraulic support and the hydraulic cylinder to move respectively according to the laser radar measurement data.

[0030] The crawler travel device 19 is provided with a hydraulic pump station 13 and a cable retracting device 14. The hydraulic support, hydraulic cylinder and crawler travel device 19 are all powered by the hydraulic pump station 13. The cable retracting device 14 is used to retract and release the connecting cables when moving. The crawler travel device 19 is driven by hydraulic means, and is 2m long and 1.5m wide. The crawler travel device 19 drives the connecting rod 4 connected to it to move forward or backward, and then drives the telescopic air duct 5 and the air supply duct 1 suspended below to move forward or backward, thereby ensuring the safe ventilation distance between the air outlet of the air supply duct 1 and the front, and its automatic control range is 0 to 10m.

[0031] The hydraulic cylinder is equipped with a displacement sensor for real-time monitoring of the cylinder telescopic distance. The control device controls each hydraulic cylinder independently or in conjunction. The hydraulic cylinder is 1.5m long and has a telescopic range of 0 to 1.2m. It can adjust the horizontality of the telescopic air cylinder 5 and the air supply cylinder 1.

[0032] A hydraulic locking device 12 is provided at the top of the hydraulic cylinder, and the hydraulic cylinder and the slide rail 2 are locked by the hydraulic locking device 12. When the air supply cylinder 1 needs to be moved, the hydraulic locking device 12 is opened.

[0033] A wind tube storage device is provided below the slide rail 2; the telescopic wind tube 5 is provided in the wind tube storage device, and can be extended and retracted in length under the drive of the self-propelled crawler platform. The wind tube storage section can store telescopic wind tubes 5 with a length of 15m and a diameter of φ600mm to φ1000mm. The telescopic wind tube 5 is connected to a plurality of sliders 3 by a connecting chain 9, and each slider 3 is connected by a connecting chain 9 (the telescopic length is 1m).

[0034] The hydraulic strut is designed to be 1.3m long and 0.5m long, and its upper end is fixed on the slide rail 2. Under normal working conditions, the control device controls it to be fully extended, and the hydraulic strut supports the slide rail 2; the self-propelled crawler platform moves forward or backward along the slide rail 2 under the control of the control system 15. When moving as a whole, the control system 15 controls it to be fully retracted, and the hydraulic cylinder supports the slide rail 2; under the control of the control system 15, the hydraulic locking device 12 is locked to prevent the slider 3 from sliding, and the self-propelled crawler platform uses the hydraulic cylinder to support the slide rail 2, so that the device as a whole moves forward or backward along the lane direction.

[0035] A method for automatically ensuring the safe ventilation distance between the air supply duct of a comprehensive excavation face and the front face, adopting the above-mentioned automatic system for ensuring the safe ventilation distance between the air supply duct of a comprehensive excavation face and the front face; using laser radar 16, laser radar 17, and laser radar 18 to monitor the distance L between the air supply duct 1 and the front face in real time, and the control system 15 adjusts the crawler walking device 19 according to the data to drive the hydraulic cylinder to synchronously move the air supply duct 1 to ensure that the distance L between the air supply duct 1 and the front face is maintained within the range of 5 to 10 meters.

[0036] When it is necessary to adjust the distance between the crawler walking device 19 and the two sides of the tunnel, the control system 15 controls the lower ends of the hydraulic pillars 7 and 8 to be retracted, and the air supply tube 1 and the slide rail 2 are supported on the self-moving crawler platform through the hydraulic cylinders 10 and 11. The laser radar detects the distance between the crawler device and the two sides of the tunnel. The control system 15 automatically adjusts the position of the crawler walking device 19 according to the measurement results, and then controls the hydraulic pillars 7 and 8 to extend, and the fixed slide rail 2 is supported by the hydraulic pillars.

[0037] When the height of the air supply duct 1 needs to be adjusted, the control system 15 adjusts the hydraulic support to achieve height adjustment according to the height data of the air supply duct 1 measured by the laser radar.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An automatic guarantee system for the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face, characterized in that: It includes telescopic air cylinder, positive pressure air cylinder, air supply cylinder, hydraulic support, slide rail and self-moving crawler platform; The two ends of the slide rail are supported by hydraulic struts and are arranged on one side of the head coal wall. A plurality of slide blocks are arranged on the slide rail. The positive pressure air cylinder, telescopic air cylinder and air supply cylinder are connected in series in sequence and hoisted on the slide block. The slide blocks hoisting the telescopic air cylinder are connected by a connecting chain, and the slide blocks hoisting the air supply cylinder are fixedly connected by a connecting rod. The self-moving crawler platform is arranged below the air supply cylinder. Hydraulic cylinders are fixedly provided at both ends of the self-moving crawler platform. The hydraulic cylinders are fixedly connected to connecting rods. When the self-moving crawler platform moves along the length direction of the slide rail, the hydraulic cylinders drive the air supply cylinder to move along the slide rail through the connecting rod, thereby adjusting the safe ventilation distance of the air supply cylinder from the front.

2. The automatic guarantee system for the safe ventilation distance between the air supply duct and the front of the fully mechanized excavation face according to claim 1 is characterized by: The self-propelled crawler platform includes a crawler walking device, a control system, and a laser radar. The hydraulic cylinder is fixed at both ends of the crawler walking device. A plurality of laser radars are arranged on the crawler walking device, which are used to measure the safe ventilation distance between the air outlet of the air supply duct and the front, the distance between the crawler walking device and the two sides of the tunnel, and the height of the air supply duct. The control system controls the movement of the crawler walking device, the hydraulic support and the hydraulic cylinder according to the laser radar measurement data.

3. The automatic guarantee system for the safe ventilation distance between the air supply duct and the front of the fully mechanized excavation face according to claim 2 is characterized by: The crawler walking device is provided with a hydraulic pump station and a cable retracting device. The hydraulic support, hydraulic cylinder and crawler walking device are all powered by the hydraulic pump station. The cable retracting device is used for retracting and releasing connecting cables during movement.

4. The automatic guarantee system for the safe ventilation distance between the air supply duct and the front of the fully mechanized excavation face according to claim 2 is characterized by: The hydraulic cylinder is equipped with a displacement sensor for real-time monitoring of the extension and retraction distance of the cylinder. The control device controls each hydraulic cylinder independently or in linkage.

5. The automatic guarantee system for the safe ventilation distance between the air supply duct and the front of the fully mechanized excavation face according to claim 1 is characterized by: A hydraulic locking device is provided at the top of the hydraulic cylinder, and the hydraulic cylinder and the slide rail are locked by the hydraulic locking device.

6. The automatic guarantee system for the safe ventilation distance between the air supply duct and the front of the fully mechanized excavation face according to claim 1 is characterized by: A wind tube storage device is provided below the slide rail; the telescopic wind tube is arranged in the wind tube storage device, and is extended and retracted in length when driven by the self-moving crawler platform.

7. A method for automatically ensuring the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face, characterized in that: An automatic guarantee system for the safe ventilation distance between the air supply duct and the head of the comprehensive excavation face as described in any one of claims 1 to 6 is adopted; a laser radar is used to monitor the distance between the air supply duct and the head in real time, and the control system adjusts the crawler walking device according to the data to drive the hydraulic cylinder to synchronously move the air supply duct to ensure that the distance between the air supply duct and the head is maintained within 5 to 10 meters.

8. The method for automatically ensuring the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face according to claim 7 is characterized in that: When it is necessary to adjust the distance between the crawler device and the two sides of the tunnel, the control system controls the lower end of the hydraulic support to be retracted, and the air supply tube and the slide rail are supported on the self-moving crawler platform through the hydraulic cylinder. The laser radar detects the distance between the crawler device and the two sides of the tunnel. The control system automatically adjusts the position of the crawler device according to the measurement results, and then controls the hydraulic support to extend, and the fixed slide rail is supported by the hydraulic support.

9. The method for automatically ensuring the safe ventilation distance between the air supply duct and the front of a fully mechanized excavation face according to claim 7 is characterized in that: When the height of the air supply duct needs to be adjusted, the control system adjusts the hydraulic support to achieve height adjustment based on the air supply duct height data measured by the laser radar.

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