A combined telescopic adjustment ejector device for mining and its use method

Abstract

The present invention relates to a combined telescopic adjustment ejector device for mining, comprising a hard bearing tube, a front flexible adjustment tube, a rear flexible adjustment tube, a bearing frame, a drainage tube, a telescopic drainage tube, and a telescopic sheath plate. The drainage tube is connected to the inner side surface of the hard bearing tube through the bearing frame. The front end of the hard bearing tube is connected to the front flexible adjustment tube, and the rear end surface is connected to the rear flexible adjustment tube. The two ends of the telescopic drainage tube are respectively connected to the connecting pipe head and the drainage tube. The telescopic sheath plate is embedded in the rear flexible adjustment tube and forms a high-pressure guide chamber with the inner side surface of the rear flexible adjustment tube. The method of use thereof includes two steps, namely, equipment assembly and ventilation operation. The present invention can effectively meet the needs of supporting use of a variety of different tunnel space structures, has high air delivery efficiency, strong damage resistance and fault repair and troubleshooting capabilities, and effectively reduces the labor intensity and cost of equipment operation and maintenance management.

Description

Technical Field

[0001] The invention relates to a combined telescopic adjustment ejector device for mining, belonging to the technical field of mine ventilation equipment. Background Art

[0002] At present, in the treatment of low oxygen environment in the upper corner, the ventilation system is mainly used to perform forced ventilation on the upper corner. However, in actual work, when performing forced ventilation on the upper corner environment, traditional ventilation fans, jet fans and other equipment are often used for ventilation. Although they can meet the needs of use, in actual operation, on the one hand, the ventilation system structure is relatively fixed, and the overall structure of the equipment cannot be flexibly adjusted according to the needs of the use environment. Therefore, the environmental adaptability is poor, and the equipment also needs to occupy a large space during transportation, which increases the difficulty of equipment transportation and further reduces the flexibility and environmental adaptability of the equipment. On the other hand, the current When ventilation equipment is in operation, it is often necessary to use electric motors and other equipment at the ventilation equipment work site to provide driving power. While increasing the energy consumption of the equipment operation, it also increases the risk of safety accidents caused by leakage. At the same time, it also requires the equipment to be effectively explosion-proof, further increasing the complexity of the equipment structure. The equipment structure is often made of metal, which has poor elastic deformation ability and heavy weight. When a failure occurs due to external forces or other factors, it is easy for the external force to cause permanent deformation of the equipment structure, thereby causing equipment failure. After the equipment failure occurs and when the equipment failure is repaired and eliminated, staff are required to dismantle and replace the faulty part. The labor intensity and construction difficulty are relatively large, and the equipment failure repair rate is also relatively poor.

[0003] Therefore, based on the defects in the above-mentioned prior art, the existing problems are studied and improved, and a combined telescopic adjustable ejector device for mining is provided, aiming to solve some existing equipment problems through the gas collection equipment. Summary of the Invention

[0004] In order to address the deficiencies in the prior art, the present invention provides a combined telescopic adjustable ejector device for mining. The invention has a simple structure, a high degree of integration and modularization, and can effectively meet the needs of supporting use in a variety of different tunnel space structures. It has high air conveying efficiency, strong damage resistance and fault repair and elimination capabilities, low energy consumption during operation, and effectively eliminates the involvement of the electrical system, further improving the safety of the system during operation, and effectively reducing the labor intensity and cost of equipment operation and maintenance management.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0006] A combined telescopic adjustment ejector device for mining, comprising a hard bearing tube, a front flexible adjustment tube, a rear flexible adjustment tube, a connecting pipe head, a guide tube, a bearing frame, a main jet port, an auxiliary jet port, a high-pressure drainage port, a drainage tube, a telescopic drainage tube, and a telescopic sheath plate. The hard bearing tube is a cylindrical tubular structure. Two bearing frames are arranged inside the hard bearing tube. The bearing frames are plate-shaped structures coaxially distributed with the hard bearing tube. The bearing frames are symmetrically distributed on both sides of the midpoint of the hard bearing tube. The drainage tube is embedded in the hard bearing tube, coaxially distributed with the hard bearing tube and connected to the inner side surface of the hard bearing tube through the bearing frames. The two ends of the drainage tube are respectively located in the hard bearing tube and the distance between the end face of the hard bearing tube is not less than 10 mm. The front end of the hard bearing tube is connected to the front flexible adjustment tube, and the rear end face is connected to the rear flexible adjustment tube. The hard bearing tube, the front flexible adjustment tube, and the rear flexible adjustment tube are coaxially distributed. The front flexible adjustment tube and the rear flexible adjustment tube are respectively connected to the connecting pipe head through the guide tube. The telescopic drainage tube is embedded in the front flexible adjustment tube, and its two ends are connected with the connecting pipe head and the drainage tube respectively. There are at least three telescopic sheath plates, which are embedded in the rear flexible adjustment tube, and the rear end face is connected with the front end face of the carrier frame, and the front end face is connected with the outer side face of the guide tube, and a high-pressure guide cavity with a width of not less than 5 mm is formed between the inner side face of the rear flexible adjustment tube. At the same time, each high-pressure guide cavity is connected with at least one main jet port, and there are several main jet ports, which are respectively connected with the front end faces of the two carrier frames and are evenly distributed around the axis of the carrier frame, among which the main jet port located on the carrier frame at the rear end face of the hard carrier tube is connected with the front flexible adjustment tube, and the main jet port located on the carrier frame at the front end face of the hard carrier tube is connected with the high-pressure guide cavity. There are several auxiliary jet ports, which are embedded in the side wall of the telescopic sheath plate and distributed along the axis direction of the telescopic sheath plate. At the same time, the high-pressure guide cavity is connected with the rear flexible adjustment tube through the auxiliary jet port, and the high-pressure drainage port is embedded in the side wall of the hard carrier tube and is connected with each main jet port through a diversion pipe.

[0007] Furthermore, the front flexible adjustment tube and the rear flexible adjustment tube are both tubular structures with a rectangular axial cross-section, and the front flexible adjustment tube and the rear flexible adjustment tube are both accordion cover structures. The length of the front flexible adjustment tube is not more than 60% of the length of the rear flexible adjustment tube, and 1%-5% of the effective length of the front flexible adjustment tube and the rear flexible adjustment tube are embedded in the hard load-bearing tube and connected to the wall of the hard load-bearing tube.

[0008] Furthermore, the telescopic drainage tube is a truncated cone-shaped tubular structure, and the diameter of the tube connected to the guide tube is at least twice that of the tube connected to the drainage tube. The telescopic drainage tube is an elastic telescopic tube structure coaxially distributed with the front flexible adjustment tube.

[0009] Furthermore, the drainage pipe includes a straight pipe and a Venturi tube. The straight pipe is a tubular structure with a rectangular axial cross-section, and is connected to the inner side of the rigid bearing cylinder through a bearing frame. One end of the straight pipe is connected to the telescopic drainage pipe, and the other end is connected to the Venturi tube through an elastic connecting pipe and is coaxially distributed. The Venturi tube is connected to the inner side of the rigid bearing cylinder through a bearing frame, and at the same time, the Venturi tube is connected to the后置 flexible adjustment cylinder. Moreover, the length of the Venturi tube is 50% - 80% of the length of the rigid bearing cylinder, the diameter of the connecting end of the Venturi tube and the后置 flexible adjustment cylinder is 50% - 80% of the average diameter of the flexible adjustment cylinder, and at the same time, the diameter at this position is 1.5 - 5 times the diameter of its minimum position.

[0010] Furthermore, the straight pipe and the Venturi tube are connected through a pressurization mechanism. The pressurization mechanism is connected to the bearing frame and is connected to the high-pressure drainage port through a shunt pipe. The pressurization mechanism can be any one of a pneumatic booster pump and an air amplifier; at the same time, the main jet ports and between the main jet port and the pressurization mechanism operate independently.

[0011] Furthermore, the telescopic sheath plate is a groove-shaped structure with a cross-section in any one of the shapes of "凵" and "U", and its axial cross-section is a right trapezoidal structure. Its depth decreases from the rigid bearing cylinder towards the后置 flexible adjustment cylinder. The telescopic sheath plate adopts any one of the distribution structures of being parallel to the axis of the后置 flexible adjustment cylinder and being helically distributed around the axis of the后置 flexible adjustment cylinder.

[0012] Furthermore, the axis of the auxiliary jet port forms an angle of 0° - 10° with the plate surface of the telescopic sheath plate and the inner side of the后置 flexible adjustment cylinder, and at the same time forms an angle of 0° - 60° with the axis of the后置 flexible adjustment cylinder. And when the angle between the axis of the auxiliary jet port and the axis of the后置 flexible adjustment cylinder is greater than 0°, the axes of each auxiliary jet port are helically distributed around the axis of the后置 flexible adjustment cylinder, and at the same time, the axes of each auxiliary jet port are all in the tangential direction of the same virtual cylinder coaxially distributed with the后置 flexible adjustment cylinder.

[0013] A method for using a mine-used combined telescopic adjustable ejector device includes the following steps:

[0014] S1, equipment assembly. First, assemble the rigid bearing cylinder, the前置 flexible adjustment cylinder, the后置 flexible adjustment cylinder, the connecting pipe head, the diversion pipe, the bearing frame, the main jet port, the auxiliary jet port, the high-pressure drainage port, the drainage pipe, the telescopic drainage pipe, and the telescopic sheath plate to obtain a finished telescopic adjustable ejector. Then, install the rigid bearing cylinder of the telescopic adjustable ejector at the top position of the roadway through a positioning mechanism and make its axis parallel to the axis of the roadway. Finally, connect the后置 flexible adjustment cylinder to the exhaust duct through the connecting pipe head, and connect the high-pressure drainage port to the mine high-pressure gas source to complete the system assembly;

[0015] S2, ventilation operation, after completing the system assembly through step S1, first, the high-pressure air source of the mine is introduced into the main jet port through the high-pressure inlet, and a part of the high-pressure airflow is delivered to the front flexible regulating cylinder by the main jet port; the other part is distributed and delivered to the high-pressure guide cavity of the rear flexible regulating cylinder, and the high-pressure airflow is used to drive the front flexible regulating cylinder and the rear flexible regulating cylinder to extend, so that the equipment is in working state; at the same time, the high-pressure airflow delivered to the high-pressure guide cavity is delivered to the rear flexible regulating cylinder through the auxiliary jet port, and forms a high-pressure and high-speed airflow close to the inner side of the cylinder wall of the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the cylinder wall of the rear flexible regulating cylinder is discharged from the connecting pipe head and delivered to the exhaust duct, and the high-pressure and high-speed airflow at the cylinder wall ... During the flow, a pressure difference occurs between the airflow at the wall of the rear flexible regulating cylinder and its center position, and under the action of the pressure difference, the airflow in the middle part of the rear flexible regulating cylinder is driven to be synchronously transported to the exhaust duct at high speed with the high-pressure and high-speed airflow at the cylinder wall. While completing the airflow discharge, the air pressure in the rear flexible regulating cylinder is further reduced, and the pressure difference between the telescopic drainage tube in the rear flexible regulating cylinder and the front flexible regulating cylinder is increased. Therefore, driven by the pressure difference, the telescopic drainage tube in the front flexible regulating cylinder transports the air in the external alley through the drainage tube to the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the wall of the rear flexible regulating cylinder is driven to realize high-speed jet discharge of the airflow into the exhaust duct.

[0016] The present invention has a simple structure, a high degree of integration and modularity, and can effectively meet the needs of supporting use in a variety of different tunnel space structures. It has high air transportation efficiency, strong damage resistance and fault repair and troubleshooting capabilities, low energy consumption during operation, and effectively eliminates the involvement of the electrical system, further improving the safety of the system during operation and effectively reducing the labor intensity and cost of equipment operation and maintenance management. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0018] Figure 1 This is a schematic diagram of a state structure of the present invention;

[0019] Figure 2 This is a schematic diagram of another state structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the local structure when the telescopic sheath plate is distributed parallel to the axis of the rear flexible adjustment cylinder;

[0021] Figure 4 It is a schematic diagram of the local structure when the telescopic sheath plate is distributed parallel to the axis of the rear flexible adjustment cylinder;

[0022] Figure 5 The figure is a flow chart of the method for using the present invention. DETAILED DESCRIPTION

[0023] In order to facilitate the construction of the technical means, creative features, objectives and effects achieved by the present invention, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-4 As shown, a combined telescopic adjustment ejector device for mining includes a hard bearing tube 1, a front flexible adjustment tube 2, a rear flexible adjustment tube 3, a connecting pipe head 4, a guide tube 5, a bearing frame 6, a main jet port 7, an auxiliary jet port 8, a high-pressure drainage port 9, a drainage pipe 10, a telescopic drainage pipe 12, and a telescopic sheath plate 13. The hard bearing tube 1 is a cylindrical tubular structure. Two bearing frames 6 are arranged in the hard bearing tube 1. The bearing frames 6 are plate-like structures coaxially distributed with the hard bearing tube 1. The bearing frames 6 are symmetrically distributed on both sides of the midpoint of the hard bearing tube 1. The flow tube 10 is embedded in the hard bearing tube 1, coaxially distributed with the hard bearing tube 1 and connected to the inner side of the hard bearing tube 1 through the bearing frame 6, and the two ends of the drainage tube 10 are respectively located in the hard bearing tube 1 and the distance between the end face of the hard bearing tube 1 is not less than 10 mm. The front end of the hard bearing tube 1 is connected to the front flexible adjustment tube 2, and the rear end face is connected to the rear flexible adjustment tube 3. The hard bearing tube 1, the front flexible adjustment tube 2, and the rear flexible adjustment tube 3 are coaxially distributed. The front flexible adjustment tube 2 and the rear flexible adjustment tube 3 are respectively connected to the connecting tube through the guide tube 5. Head 4 is connected, the telescopic drainage tube 12 is embedded in the front flexible adjustment cylinder 2, and its two ends are respectively connected to the connecting pipe head 4 and the drainage tube 10, and at least three telescopic sheath plates 13 are embedded in the rear flexible adjustment cylinder 3, and its rear end face is connected to the front end face of the carrier 6, and the front end face is connected to the outer side of the guide tube 5, and a high-pressure guide cavity 14 with a width of not less than 5 mm is formed between the inner side of the rear flexible adjustment cylinder 3, and each high-pressure guide cavity 14 is connected to at least one main jet port 7, and the main jet port 7 is several, respectively connected to the front end face of the two carriers 6, and They are evenly distributed around the axis of the carrier frame 6, wherein the main jet port 7 located on the rear end face of the rigid carrier tube 1 is connected to the front flexible adjustment tube 2, and the main jet port located on the front end face of the carrier frame 6 is connected to the high-pressure guide cavity 14. There are several auxiliary jet ports 8, which are embedded in the side wall of the telescopic sheath plate 13 and distributed along the axial direction of the telescopic sheath plate 13. At the same time, the high-pressure guide cavity 14 is connected to the rear flexible adjustment tube 3 through the auxiliary jet ports 8. The high-pressure drainage port 9 is embedded in the side wall of the rigid carrier tube 1 and is connected to each main jet port 7 through the diversion pipe 11.

[0025] In this embodiment, the front flexible adjustment tube 2 and the rear flexible adjustment tube 3 are both tubular structures with a rectangular axial cross-section, and the front flexible adjustment tube 2 and the rear flexible adjustment tube 3 are both accordion cover structures. The length of the front flexible adjustment tube 2 is not more than 60% of the length of the rear flexible adjustment tube 3, and 1%-5% of the effective length of the front flexible adjustment tube 2 and the rear flexible adjustment tube 3 are embedded in the hard supporting tube 1 and connected to the tube wall of the hard supporting tube 1.

[0026] By making the length of the front flexible regulating cylinder shorter than that of the rear flexible regulating cylinder, the purpose of the gas volume of the rear flexible regulating cylinder being larger than that of the front flexible regulating cylinder is achieved, thereby achieving, on the one hand, that under the same pressure gas drive, the front flexible regulating cylinder is limitedly expanded to meet the needs of equipment operation; on the other hand, during the airflow conveying process, when the telescopic drainage tube is blocked, resulting in insufficient airflow entering the rear flexible regulating cylinder, causing the overall air pressure in the rear flexible regulating cylinder to be slightly lower than the air pressure of the rear flexible regulating cylinder, the front flexible regulating cylinder is driven by air pressure to adjust its length to ensure the stability of pressure and flow during airflow conveying. When the overall air pressure in the rear flexible regulating cylinder is seriously lower than the air pressure of the rear flexible regulating cylinder, it indicates that the current equipment is in a fault state. At the same time, the overall length of the gas in the rear flexible regulating cylinder is contracted under the drive of negative pressure, disconnecting the connection with the exhaust duct to prevent the equipment from further structural damage due to excessive pressure difference, and also effectively reducing the workload and difficulty of subsequent equipment maintenance.

[0027] At the same time, the telescopic drainage tube 12 is a truncated cone-shaped tubular structure, and the diameter of the tube connected to the guide tube 5 is at least twice that of the tube connected to the drainage tube 10. The telescopic drainage tube 4 is an elastic telescopic tube structure coaxially distributed with the front flexible adjustment tube 2.

[0028] By setting the diameter difference of the telescopic drainage tube and utilizing the diameter change of the telescopic drainage tube, the pressure and flow rate of the transported airflow can be increased by reducing the cross-sectional area of the pipeline, thereby improving the basic conditions for subsequent airflow transportation.

[0029] It is emphasized that the drainage tube 10 includes a straight tube 101 and a venturi tube 102. The straight tube 101 is a tubular structure with a rectangular axial cross-section, which is connected to the inner side of the hard supporting tube 1 through the supporting frame 6. One end of the straight tube 101 is connected to the telescopic drainage tube 12, and the other end is connected to the venturi tube 102 through an elastic connecting tube 103 and is coaxially distributed. The venturi tube 102 is connected to the inner side of the hard supporting tube 1 through the supporting frame 6. At the same time, the venturi tube 102 is also connected to the rear flexible adjustment tube 3, and the length of the venturi tube 102 is 50%-80% of the length of the hard supporting tube 1. The diameter of the end where the venturi tube 102 is connected to the rear flexible adjustment tube 3 is 50%-80% of the average diameter of the flexible adjustment tube 3, and the diameter at this point is 1.5-5 times the diameter of its minimum position.

[0030] By setting a Venturi tube in the drainage tube, the airflow transported by the telescopic drainage tube is first pressurized and then depressurized, further reducing the pressure and flow rate of the airflow when it is transported into the后置 flexible adjustment cylinder, thereby further increasing the pressure difference and flow rate difference between the airflow at the center of the后置 flexible adjustment cylinder and the airflow at its pipe wall, so as to improve the driving efficiency of the airflow at the pipe wall on the airflow at the center and improve the efficiency of airflow transportation.

[0031] Further optimized, the straight pipe 101 and the Venturi tube 102 are connected through a pressurization mechanism 104. The pressurization mechanism 104 is connected to the carrier 6 and is connected to the high-pressure drainage port 9 through a shunt tube 11. The pressurization mechanism 104 is any one of a pneumatic booster pump and an air amplifier; at the same time, the main jet ports 7 operate independently of each other and the main jet ports 7 and the pressurization mechanism 104 operate independently.

[0032] By using the set pressurization mechanism, while further increasing the pressure difference between the input end and the output end of the Venturi tube, increasing the airflow pressure difference in the后置 flexible adjustment cylinder, and improving the airflow transportation efficiency, it can also assist in improving the working efficiency of the telescopic drainage tube using negative pressure to drain the airflow in the roadway and improve the stability of airflow transportation.

[0033] Specifically noted, the telescopic sheath plate 13 has a groove-shaped structure with a cross-section in any one of the shapes of "凵" or "U", and its axial section is a right trapezoidal structure. Its depth decreases from the rigid carrier cylinder 1 towards the后置 flexible adjustment cylinder 3. The telescopic sheath plate 13 adopts any one of the distribution structures parallel to the axis of the后置 flexible adjustment cylinder 3 and distributed in a spiral structure around the axis of the后置 flexible adjustment cylinder 3.

[0034] At the same time, the axis of the auxiliary jet port 8 forms an angle of 0° - 10° with the plate surface of the telescopic sheath plate 13 and the inner side surface of the后置 flexible adjustment cylinder 3, and forms an angle of 0° - 60° with the axis of the后置 flexible adjustment cylinder 3. And when the angle between the axis of the auxiliary jet port 8 and the axis of the后置 flexible adjustment cylinder 3 is greater than 0°, the axes of the auxiliary jet ports 8 are distributed in a spiral direction around the axis of the后置 flexible adjustment cylinder 2, and at the same time, the axes of the auxiliary jet ports 8 are all in the tangential direction of a virtual cylinder coaxially distributed with the后置 flexible adjustment cylinder 3.

[0035] By setting the depth change of the telescopic sheath plate and the axis direction of the auxiliary jet port, on the one hand, it can improve the flow direction of the high-speed and high-pressure airflow in the后置 flexible adjustment cylinder and improve the transportation efficiency of the high-speed and high-pressure airflow to the airflow at the center of the后置 flexible adjustment cylinder; on the other hand, the gaps between adjacent telescopic sheath plates form several pairs of airflow diversion channels during operation, improving the directivity during airflow transportation, further improving the airflow transportation efficiency, and reducing the energy loss and airflow vibration caused by the chaotic direction of the airflow.

[0036] like Figure 5 As shown, a method for using a combined telescopic adjustment ejector device for mining includes the following steps:

[0037] S1, equipment assembly, first assemble the hard bearing cylinder, front flexible adjustment cylinder, rear flexible adjustment cylinder, connecting pipe head, guide pipe, bearing frame, main jet port, auxiliary jet port, high-pressure drainage port, drainage pipe, telescopic drainage pipe, and telescopic sheath plate to obtain the finished telescopic adjustment ejector, then install the hard bearing cylinder of the telescopic adjustment ejector at the top of the tunnel through the positioning mechanism, and make its axis parallel to the tunnel axis, finally connect the rear flexible adjustment cylinder to the exhaust duct through the connecting pipe head, and connect the high-pressure drainage port to the mine high-pressure gas source, and the system assembly is completed;

[0038] S2, ventilation operation, after completing the system assembly through step S1, first, the high-pressure air source of the mine is introduced into the main jet port through the high-pressure inlet, and a part of the high-pressure airflow is delivered to the front flexible regulating cylinder by the main jet port; the other part is distributed and delivered to the high-pressure guide cavity of the rear flexible regulating cylinder, and the high-pressure airflow is used to drive the front flexible regulating cylinder and the rear flexible regulating cylinder to extend, so that the equipment is in working state; at the same time, the high-pressure airflow delivered to the high-pressure guide cavity is delivered to the rear flexible regulating cylinder through the auxiliary jet port, and forms a high-pressure and high-speed airflow close to the inner side of the cylinder wall of the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the cylinder wall of the rear flexible regulating cylinder is discharged from the connecting pipe head and delivered to the exhaust duct, and the high-pressure and high-speed airflow at the cylinder wall ... During the flow, a pressure difference occurs between the airflow at the wall of the rear flexible regulating cylinder and its center position, and under the action of the pressure difference, the airflow in the middle part of the rear flexible regulating cylinder is driven to be synchronously transported to the exhaust duct at high speed with the high-pressure and high-speed airflow at the cylinder wall. While completing the airflow discharge, the air pressure in the rear flexible regulating cylinder is further reduced, and the pressure difference between the telescopic drainage tube in the rear flexible regulating cylinder and the front flexible regulating cylinder is increased. Therefore, driven by the pressure difference, the telescopic drainage tube in the front flexible regulating cylinder transports the air in the external alley through the drainage tube to the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the wall of the rear flexible regulating cylinder is driven to realize high-speed jet discharge of the airflow into the exhaust duct.

[0039] The present invention has a simple structure, a high degree of integration and modularity, and can effectively meet the needs of supporting use in a variety of different tunnel space structures. It has high air transportation efficiency, strong damage resistance and fault repair and troubleshooting capabilities, low energy consumption during operation, and effectively eliminates the involvement of the electrical system, further improving the safety of the system during operation and effectively reducing the labor intensity and cost of equipment operation and maintenance management.

[0040] In addition, since the equipment adopts a large number of flexible structures such as the front flexible adjustment cylinder and the rear flexible adjustment cylinder, the structural strength of the equipment is effectively improved by air pressure during use, and the equipment has good elastic deformation ability. At the same time, it also effectively reduces the dead weight of the flexible adjustment cylinder and the rear flexible adjustment cylinder. On the one hand, it can effectively adjust the equipment structure and flexibly meet the needs of equipment transportation and installation operations in different use environments; on the other hand, it also effectively reduces the labor intensity and construction difficulty during equipment maintenance and replacement.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined telescopic adjustment ejector device for mining, characterized by: The combined telescopic adjustment ejector device for mining includes a hard bearing tube, a front flexible adjustment tube, a rear flexible adjustment tube, a connecting pipe head, a guide tube, a bearing frame, a main jet port, an auxiliary jet port, a high-pressure drainage port, a drainage pipe, a telescopic drainage pipe, and a telescopic sheath plate. The hard bearing tube is a cylindrical tubular structure. Two bearing frames are arranged inside the hard bearing tube. The bearing frames are plate-shaped structures coaxially distributed with the hard bearing tube. The bearing frames are symmetrically distributed on both sides of the midpoint of the hard bearing tube. The drainage pipe is embedded in the hard bearing tube. In the hard bearing tube, it is coaxially distributed with the hard bearing tube and connected to the inner side of the hard bearing tube through the bearing frame, and the two ends of the drainage tube are respectively located in the hard bearing tube and the distance between them and the end face of the hard bearing tube is not less than 10 mm. The front end of the hard bearing tube is connected to the front flexible adjustment tube, and the rear end face is connected to the rear flexible adjustment tube. The hard bearing tube, the front flexible adjustment tube, and the rear flexible adjustment tube are coaxially distributed. The front flexible adjustment tube and the rear flexible adjustment tube are respectively connected to the connecting pipe head through the guide tube. The telescopic drainage tube is embedded in the front flexible adjustment tube, and its two ends are respectively connected with the connecting pipe head and the drainage tube. The telescopic sheath plate is provided with at least three, which are embedded in the rear flexible adjustment tube, and the rear end face thereof is connected with the front end face of the carrier frame, and the front end face is connected with the outer side face of the guide tube, and a high-pressure guide cavity with a width of not less than 5 mm is formed between the inner side face of the rear flexible adjustment tube. At the same time, each high-pressure guide cavity is connected with at least one main jet port. The main jet ports are provided with a plurality of them, which are respectively connected with the front end faces of the two carrier frames and are evenly distributed around the axis of the carrier frame. The main jet port located on the carrier frame at the rear end face of the hard carrier tube is connected with the front flexible adjustment tube, and the main jet port located on the carrier frame at the front end face of the hard carrier tube is connected with the high-pressure guide cavity. The auxiliary jet ports are provided with a plurality of them, which are embedded in the side wall of the telescopic sheath plate and distributed along the axis direction of the telescopic sheath plate. At the same time, the high-pressure guide cavity is connected with the rear flexible adjustment tube through the auxiliary jet port. The high-pressure drainage port is embedded in the side wall of the hard carrier tube and is connected with each main jet port through a shunt pipe. The front flexibility adjustment tube and the rear flexibility adjustment tube are both tubular structures with rectangular axial cross-sections, and both the front flexibility adjustment tube and the rear flexibility adjustment tube are accordion cover structures; The drainage tube includes a straight tube and a Venturi tube. The straight tube is a tubular structure with a rectangular axial cross section.

2. A combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The length of the front flexible adjustment tube is not greater than 60% of the length of the rear flexible adjustment tube, and 1%-5% of the effective length of the front flexible adjustment tube and the rear flexible adjustment tube is embedded in the hard bearing tube and connected to the wall of the hard bearing tube.

3. The combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The telescopic drainage tube is a truncated cone-shaped tubular structure, and its diameter connected to the guide tube is at least twice that of the tube connected to the drainage tube. The telescopic drainage tube is an elastic telescopic tube structure coaxially distributed with the front flexible adjustment tube.

4. The combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The straight pipe is connected to the inner side of the rigid bearing cylinder through a bearing frame. One end of the straight pipe is connected to the telescopic drainage pipe, and the other end is connected to a Venturi tube through an elastic connecting tube and is coaxially distributed. The Venturi tube is connected to the inner side of the rigid bearing cylinder through a bearing frame. At the same time, the Venturi tube is also connected to a rear flexible adjustment cylinder. The length of the Venturi tube is 50%-80% of the length of the rigid bearing cylinder. The diameter of the connecting end of the Venturi tube and the rear flexible adjustment cylinder is 50%-80% of the average diameter of the flexible adjustment cylinder. At the same time, the diameter at the connecting end is 1.5-5 times the diameter at its minimum position.

5. The combined telescopic and adjustable ejector device for mining according to claim 4, characterized in that: The straight pipe and the Venturi tube are connected through a pressurization mechanism. The pressurization mechanism is connected to the bearing frame and is connected to the high-pressure drainage port through a shunt pipe. The pressurization mechanism can be any one of a pneumatic booster pump and an air amplifier. At the same time, the main jet ports and between the main jet port and the pressurization mechanism operate independently.

6. The combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The telescopic sheath plate has a trough-shaped structure with a cross-section in any one of the shapes of "凵" and "U", and its axial section has a right trapezoidal structure. Its depth decreases from the rigid bearing cylinder towards the rear flexible adjustment cylinder. The telescopic sheath plate adopts any one of the distribution structures of being parallel to the axis of the rear flexible adjustment cylinder and being helically distributed around the axis of the rear flexible adjustment cylinder.

7. The combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The axis of the auxiliary jet port forms an angle of 0°-10° with the plate surface of the telescopic sheath plate and the inner side of the rear flexible adjustment cylinder, and at the same time forms an angle of 0°-60° with the axis of the rear flexible adjustment cylinder. When the angle between the axis of the auxiliary jet port and the axis of the rear flexible adjustment cylinder is greater than 0°, the axes of each auxiliary jet port are distributed in a helical direction around the axis of the rear flexible adjustment cylinder. At the same time, the axes of each auxiliary jet port are all in the tangential direction of a virtual cylinder coaxially distributed with the rear flexible adjustment cylinder.

8. The method for using a combined telescopic and adjustable ejector device for mining according to claim 1, characterized in that: The usage method of the mine combined telescopic adjustment ejector device includes the following steps: S1. Equipment assembly. First, assemble the rigid bearing cylinder, the front flexible adjustment cylinder, the rear flexible adjustment cylinder, the connecting pipe head, the diversion pipe, the bearing frame, the main jet port, the auxiliary jet port, the high-pressure drainage port, the drainage pipe, the telescopic drainage pipe, and the telescopic sheath plate to obtain a finished telescopic adjustment ejector. Then, install the rigid bearing cylinder of the telescopic adjustment ejector at the top position of the roadway through a positioning mechanism and make its axis parallel to the axis of the roadway. Finally, connect the rear flexible adjustment cylinder to the exhaust duct through the connecting pipe head and connect the high-pressure drainage port to the mine high-pressure gas source to complete the system assembly. S2, ventilation operation, after completing the system assembly through step S1, first, the high-pressure air source of the mine is introduced into the main jet port through the high-pressure inlet, and a part of the high-pressure airflow is delivered to the front flexible regulating cylinder by the main jet port; the other part is distributed and delivered to the high-pressure guide cavity of the rear flexible regulating cylinder, and the high-pressure airflow is used to drive the front flexible regulating cylinder and the rear flexible regulating cylinder to extend, so that the equipment is in working state; at the same time, the high-pressure airflow delivered to the high-pressure guide cavity is delivered to the rear flexible regulating cylinder through the auxiliary jet port, and forms a high-pressure and high-speed airflow close to the inner side of the wall of the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the wall of the rear flexible regulating cylinder is discharged from the connecting pipe head and delivered to the exhaust duct, and the high-pressure and high-speed airflow at the wall of the cylinder is discharged from the connecting pipe head and delivered to the exhaust duct. During the air flow, there is a pressure difference between the air flow at the wall position of the rear flexible regulating cylinder and its center position, and under the action of the pressure difference, the air flow in the middle part of the rear flexible regulating cylinder is driven to be synchronously transported to the exhaust duct at high speed with the high-pressure and high-speed air flow at the cylinder wall. While completing the air flow discharge, the air pressure in the rear flexible regulating cylinder is further reduced, and the pressure difference between the telescopic drainage tube in the rear flexible regulating cylinder and the front flexible regulating cylinder is increased. Therefore, driven by the pressure difference, the telescopic drainage tube in the front flexible regulating cylinder transports the air in the external alley through the drainage tube to the rear flexible regulating cylinder, and the high-pressure and high-speed airflow at the wall of the rear flexible regulating cylinder is driven to realize high-speed jet discharge of the airflow into the exhaust duct.

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