Suspension fixing structure of coal mine ventilator and fixing method of suspension fixing structure

Abstract

The invention discloses a suspension fixing structure of a coal mine ventilator and a fixing method of the suspension fixing structure, and relates to the technical field of coal mine ventilation equipment. Comprising a U-shaped fixing frame, a pair of first U-shaped frames, a pair of second U-shaped frames and a pair of third U-shaped frames, and ventilation cylinders are placed in openings of the first U-shaped frames, the second U-shaped frames and the third U-shaped frames. A first arc-shaped clamping plate and a pair of second arc-shaped clamping plates are arranged in the middle in an opening of each of the first U-shaped frame, the second U-shaped frame and the third U-shaped frame, the first arc-shaped clamping plate and the pair of second arc-shaped clamping plates located on the same side are distributed in a circular mode, and the first arc-shaped clamping plates and the pair of second arc-shaped clamping plates abut against the outer wall of the ventilation barrel. In the suspended and fixed installation of the ventilator, the distance between the U-shaped frames is adjusted, so that the stability can be enhanced, the adaptability and the installation and maintenance convenience are improved, and the ventilation performance is optimized; the arc-shaped clamping plates can enhance the fixing effect, protect the cylinder wall and improve the sealing performance to a certain extent, and the measures comprehensively guarantee that the ventilation cylinder is firm in installation, good in operation and durable.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine ventilation equipment, and in particular to a suspension fixing structure of a coal mine ventilation tube and a fixing method thereof. Background Art

[0002] The existing coal mine ventilation duct suspension fixing structure mainly adopts press-fit, snap-on and welding types.

[0003] The press-fit structure is simple and easy to operate, but it is greatly affected by geological disturbances and wind loads, and is prone to safety accidents. The snap-on structure has strong resistance, but because the snap-on structure is complex and has many vulnerable parts, it is difficult to maintain, and it is easy to loosen, and its safety and reliability are insufficient. The welded structure has high strength, but the welding process is complicated, and the welding points are prone to corrosion and aging, which affects the service life of the ventilator and fixed structure.

[0004] In summary, in the complex environment of frequent coal mine disasters and large wind pressure fluctuations, the traditional suspended fixed structure is difficult to meet the requirements of safety and reliability, easy maintenance and wide application range. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a suspension fixing structure and a fixing method for a coal mine ventilation duct.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: The present invention provides a suspension fixing structure of a coal mine ventilation duct, comprising a U-shaped fixing frame, wherein a pair of symmetrically distributed first U-shaped frames are provided on the left and right sides of the U-shaped fixing frame, a second U-shaped frame is provided on the outer side of each of the first U-shaped frames, and a third U-shaped frame is provided on the outer side of each of the second U-shaped frames; ventilation ducts distributed transversely and penetratingly are placed in the openings of the U-shaped fixing frame, the pair of first U-shaped frames, the pair of second U-shaped frames, and the pair of third U-shaped frames; A first arc-shaped clamping plate with the opening facing downward is provided in the middle of the openings of the first U-shaped frame, the second U-shaped frame and the third U-shaped frame, and a pair of symmetrically distributed second arc-shaped clamping plates are provided on the front and rear sides of the openings of the first U-shaped frame, the second U-shaped frame and the third U-shaped frame. The first arc-shaped clamping plate and the pair of second arc-shaped clamping plates on the same side are distributed in a circle, and the first arc-shaped clamping plate and the pair of second arc-shaped clamping plates are both against the outer wall of the ventilator.

[0007] Preferably, fixed connecting plates are fixedly provided at four corners of the left and right sides of the U-shaped fixing frame, and the outer end of each of the fixed connecting plates is fixedly connected to the first U-shaped frame on the same side, and a pair of symmetrically distributed T-shaped fixing plates are fixedly provided on the front and rear sides of the top surface of the U-shaped fixing frame; A square groove is formed on the inner side of each T-shaped fixing plate, a first hydraulic telescopic cylinder with the telescopic end facing outward is installed inside each square groove, and an elliptical cross plate is fixed on the end of the hydraulic telescopic rod of each first hydraulic telescopic cylinder.

[0008] Preferably, two pairs of linkage shafts are rotatably inserted on the front and rear sides of the top surface of the second U-shaped frame, the top end of each linkage shaft is sleeved with a concentrically fixed linkage gear, and adjacent pairs of linkage gears are meshed and connected, and a second swing arm is fixed in the middle of each linkage shaft.

[0009] Preferably, a pair of symmetrically distributed first swing arms are hinged on the front and rear sides of the top surface of the first U-shaped frame, and the outer end of the first swing arm is movably hinged to the outer end of the second swing arm on the same side; and a pair of symmetrically distributed third swing arms are hinged on the front and rear sides of the top surface of the third U-shaped frame, and the outer end of the third swing arm is movably hinged to the outer end of the second swing arm on the same side.

[0010] Preferably, both ends of each of the elliptical cross plates are provided with elliptical pin holes, the inner section of each of the first swing arms is fixed with a vertically distributed limit swing arm, the outer end of each of the limit swing arms is fixed with a limit pin shaft, and the top end of each of the limit pin shafts is slidably engaged in the elliptical pin hole on the same side.

[0011] Preferably, the second U-shaped frame is hinged on the front and rear sides with four pairs of second connecting rods symmetrically distributed in an "eight" shape, the first U-shaped frame is hinged on the front and rear sides with four symmetrically distributed first connecting rods, the outer end of each of the first connecting rods is movably hinged to the outer end of the second connecting rod on the same side, and the third U-shaped frame is hinged on the front and rear sides with four symmetrically distributed third connecting rods, the outer end of each of the third connecting rods is movably hinged to the outer end of the second connecting rod on the same side.

[0012] Preferably, a pair of side plates are fixedly provided on the inner top walls of the first U-shaped frame, the second U-shaped frame and the third U-shaped frame, a pair of fixed shafts are rotatably inserted between the bottoms of each pair of the side plates, and a concentrically fixed widened gear is sleeved on the middle part of each fixed shaft.

[0013] Preferably, a square through hole is opened in the middle of the inner top wall of the first U-shaped frame, the second U-shaped frame and the third U-shaped frame, and a second hydraulic telescopic cylinder with the telescopic end facing downward is installed inside each of the square through holes, and a "Zhong"-shaped double-sided rack is fixed at the end of the hydraulic telescopic rod of each of the second hydraulic telescopic cylinders, and each of the "Zhong"-shaped double-sided racks is meshed and connected with a pair of widened gears on the same side, and the bottom end of each of the "Zhong"-shaped double-sided racks is fixed to the middle of the top surface of the first arc-shaped clamping plate on the same side.

[0014] Preferably, a pair of staggered bending connecting plates are fixedly arranged on the inner top walls of the first U-shaped frame, the second U-shaped frame, and the third U-shaped frame. A rectangular sliding hole is formed at the bottom end of each bending connecting plate. An L-shaped inclined sliding rod is slidably inserted into each rectangular sliding hole. The bottom end of each L-shaped inclined sliding rod is fixedly connected to the second arc-shaped clamping plate on the same side. A driven rack is fixedly arranged in the middle and upper part of each L-shaped inclined sliding rod. Each driven rack is meshed and connected with the widened gear on the same side.

[0015] The present invention also provides a fixing method for the suspension and fixing structure of the coal mine ventilation duct. By using the above-mentioned suspension and fixing structure of the coal mine ventilation duct, the method includes the following steps: Step 1, fix and install the U-shaped fixing frame on the inner top wall of the coal mine roadway through a pair of T-shaped fixing plates, and adjust the distance between the U-shaped fixing frame and a pair of first U-shaped frames, a pair of second U-shaped frames, and a pair of third U-shaped frames according to the length of the ventilation duct; Under the driving action of a pair of first hydraulic telescopic cylinders, the hydraulic telescopic rods of the first hydraulic telescopic cylinders shorten, driving the elliptical cross plate to translate towards the T-shaped fixing plate on the same side. Under the limiting action formed by the limiting pin shaft and the elliptical pin hole, the first swing arm is driven to swing outwards through the limiting swing arm; Step 2, when the first swing arm swings outwards through hinge connection, under the hinge connection between the first swing arm and the second swing arm on the same side, drive the linkage gears to mesh and rotate in opposite directions, and then drive the third swing arm on the same side to swing through hinge connection through the second swing arm; At the same time, under the hinge connection between the first connecting rod and the second connecting rod, and under the hinge connection between the second connecting rod and the third connecting rod, drive the second U-shaped frame and the third U-shaped frame to translate away from the first U-shaped frame; Step 3, horizontally place the ventilation duct in the openings of the U-shaped fixing frame, a pair of first U-shaped frames, a pair of second U-shaped frames, and a pair of third U-shaped frames; Under the driving action of three pairs of second hydraulic telescopic cylinders, the hydraulic telescopic rods of the second hydraulic telescopic cylinders extend, drive the first arc-shaped clamping plate to translate downwards through the "middle"-shaped double-sided rack, and drive the first arc-shaped clamping plate to abut against the top surface of the ventilation duct; The "middle"-shaped double-sided rack meshes to drive a pair of widened gears on the same side to rotate relatively. The widened gears then mesh to drive the driven racks and L-shaped inclined sliding rods on the same side to slide obliquely upwards along the rectangular sliding holes, and drive a pair of second arc-shaped clamping plates to abut against the front and rear sides of the bottom surface of the ventilation duct, thereby completing the fixed installation of the ventilation duct.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, during the installation process, the spacing can be flexibly adjusted according to the actual length of the ventilator, making the installation work more convenient and quick, and having a wider range of applications; the installer can more easily place the ventilator in a suitable position and fix it, reducing the difficulty and time of installation; the structure with adjustable spacing is also of great benefit to the later maintenance work; if the ventilator needs to be inspected, repaired or some parts replaced, the structure with adjustable spacing can realize the convenient and quick disassembly and reinstallation of the ventilator; 2. In the present invention, the first arc-shaped clamping plate and a pair of second arc-shaped clamping plates are in close contact with the outer wall of the ventilator, which can not only fix the ventilator but also play a protective role. The ventilator is usually made of metal or plastic and other materials. During the installation process or long-term use, if it directly contacts with the rigid fixed frame, it is easy to cause wear. The arc-shaped clamping plate can be used as a buffer layer to reduce the friction between the outer wall of the ventilator and the fixed frame, thereby extending the service life of the ventilator. In summary, in the suspended and fixed installation of the ventilation duct of the present invention, adjusting the spacing between U-shaped frames can enhance stability, improve adaptability and installation and maintenance convenience, and optimize ventilation performance; installing arc-shaped clamps can enhance the fixing effect, protect the duct wall, and improve the sealing performance to a certain extent. These measures can comprehensively ensure that the ventilation duct is installed firmly, operates well, and is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention (excluding the ventilator); Figure 3 It is a schematic diagram of the structure of the U-shaped fixed frame and the first U-shaped frame, the second U-shaped frame, and the third U-shaped frame in the present invention; Figure 4 for Figure 3 Explosion diagram of Figure 5 It is a schematic structural diagram of the third U-shaped frame, the first arc-shaped clamping plate, and a pair of second arc-shaped clamping plates in the present invention; Figure 6 for Figure 5 Explosion diagram of Serial numbers in the figure: 1. U-shaped fixed frame; 2. T-shaped fixed plate; 3. first hydraulic telescopic cylinder; 4. elliptical cross plate; 5. first U-shaped frame; 6. second U-shaped frame; 7. third U-shaped frame; 8. fixed connecting plate; 9. first swing arm; 10. limit swing arm; 11. limit pin shaft; 12. second swing arm; 13. linkage gear; 14. third swing arm; 15. first connecting rod; 16. second connecting rod; 17. third connecting rod; 18. side plate; 19. bending connecting plate; 20. fixed shaft; 21. widening gear; 22. second hydraulic telescopic cylinder; 23. "Zhong" shaped double-sided rack; 24. first arc-shaped splint; 25. L-shaped oblique sliding rod; 26. driven rack; 27. second arc-shaped splint; 28. ventilator. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Embodiment 1: This embodiment provides a suspension fixing structure for a coal mine ventilation duct, see Figure 1-6 , comprising a U-shaped fixed frame 1, a pair of symmetrically distributed first U-shaped frames 5 are provided on the left and right sides of the U-shaped fixed frame 1, a second U-shaped frame 6 is provided on the outer side of each first U-shaped frame 5, and a third U-shaped frame 7 is provided on the outer side of each second U-shaped frame 6; ventilation tubes 28 distributed transversely through are placed in the openings of the U-shaped fixed frame 1, the pair of first U-shaped frames 5, the pair of second U-shaped frames 6, and the pair of third U-shaped frames 7; A first arc-shaped clamping plate 24 with its opening facing downward is provided in the middle of the opening of the first U-shaped frame 5, the second U-shaped frame 6, and the third U-shaped frame 7. A pair of symmetrically distributed second arc-shaped clamping plates 27 are provided on both the front and rear sides of the opening of the first U-shaped frame 5, the second U-shaped frame 6, and the third U-shaped frame 7. The first arc-shaped clamping plate 24 and the pair of second arc-shaped clamping plates 27 on the same side are distributed in a circle, and the first arc-shaped clamping plate 24 and the pair of second arc-shaped clamping plates 27 are both against the outer wall of the ventilator 28. The first arc-shaped clamp 24 and a pair of second arc-shaped clamps 27 can evenly disperse the fixing pressure exerted on the ventilator 28 to the outer wall of the ventilator 28; if a simple clamp is used for fixing, a large pressure point may be generated locally, causing dents or damage to the outer wall of the ventilator 28; the arc-shaped design of the arc-shaped clamps (the first arc-shaped clamp 24 and a pair of second arc-shaped clamps 27) in the embodiment of the present invention enables the pressure to be distributed more evenly, thereby extending the service life of the ventilator 28.

[0020] Embodiment 2: Based on Embodiment 1, this embodiment also includes the following contents: The four corners of the left and right sides of the U-shaped fixed frame 1 are fixed with fixed connecting plates 8, and the outer end of each fixed connecting plate 8 is fixedly connected to the first U-shaped frame 5 on the same side. A pair of symmetrically distributed T-shaped fixing plates 2 are fixedly provided on the front and rear sides of the top of the U-shaped fixed frame 1; A square groove is provided on the inner side of each T-shaped fixed plate 2, and a first hydraulic telescopic cylinder 3 with the telescopic end facing outward is installed inside each square groove, and an elliptical cross plate 4 is fixed at the end of the hydraulic telescopic rod of each first hydraulic telescopic cylinder 3. When the hydraulic telescopic rod of the first hydraulic telescopic cylinder 3 is shortened, the elliptical cross plate 4 can be driven to translate toward the T-shaped fixed plate 2 on the same side; like Figure 3 and Figure 4 As shown, two pairs of linkage shafts are rotatably inserted on the front and rear sides of the top surface of the second U-shaped frame 6, and the top end of each linkage shaft is sleeved with a concentrically fixed linkage gear 13, and the adjacent pairs of linkage gears 13 are meshed and connected, and the middle part of each linkage shaft is fixed with a second swing arm 12; A pair of symmetrically distributed first swing arms 9 are hinged on both sides of the top surface of the first U-shaped frame 5, and the outer end of the first swing arm 9 is movably hinged to the outer end of the second swing arm 12 on the same side. When the first swing arm 9 is hinged and swung outward, the hinge action of the first swing arm 9 and the second swing arm 12 on the same side can drive the linkage gear 13 to mesh with each other and rotate in the opposite direction. A pair of symmetrically distributed third swing arms 14 are hinged on both sides of the top surface of the third U-shaped frame 7, and the outer end of the third swing arm 14 is movably hinged to the outer end of the second swing arm 12 on the same side. The third swing arm 14 on the same side can be driven to swing by the second swing arm 12; Each elliptical cross plate 4 has elliptical pin holes at both ends, and each first swing arm 9 has a vertically distributed limit swing arm 10 fixedly disposed at its inner section. A limit pin 11 is fixedly disposed at the outer end of each limit swing arm 10. The top end of each limit pin 11 is slidably engaged in the elliptical pin hole on the same side. Under the limiting effect of the limit pin 11 and the elliptical pin hole, the first swing arm 9 can be driven to swing outwards by the limit swing arm 10; By such arrangement, a plurality of ventilators 28 of different lengths can be adapted. In the actual ventilation system installation project, ventilators 28 of various lengths may be used. By such an installation method with adjustable spacing, the same set of U-shaped fixing frames 1 and the related components matched therewith can be used for the installation of ventilators 28 of various lengths, which greatly improves the versatility of the fixing structure and reduces the cost of customizing different fixing structures due to different lengths of ventilators 28. The front and rear sides of the second U-shaped frame 6 are hinged with four pairs of second connecting rods 16 symmetrically distributed in an "eight" shape, the front and rear sides of the first U-shaped frame 5 are hinged with four symmetrically distributed first connecting rods 15, the outer end of each first connecting rod 15 is movably hinged with the outer end of the second connecting rod 16 on the same side, and the front and rear sides of the third U-shaped frame 7 are hinged with four symmetrically distributed third connecting rods 17, the outer end of each third connecting rod 17 is movably hinged with the outer end of the second connecting rod 16 on the same side. Under the hinge action of the first connecting rod 15 and the second connecting rod 16, and under the hinge action of the second connecting rod 16 and the third connecting rod 17, the second U-shaped frame 6 and the third U-shaped frame 7 can be driven to translate in a direction away from the first U-shaped frame 5; When the spacing between the U-shaped fixing frame 1 and the pair of first U-shaped frames 5, the pair of second U-shaped frames 6, and the pair of third U-shaped frames 7 is reasonably adjusted according to the length of the ventilating tube 28, the ventilating tube 28 can be more firmly fixed in the installation position; because the ventilating tubes 28 of different lengths are subjected to different self-gravity distribution and external forces, the appropriate spacing can make the fixing point better bear the weight of the ventilating tube 28, and avoid the deformation or falling off of the ventilating tube 28 caused by excessive local force due to unreasonable spacing between the fixing points; Reasonable spacing adjustment helps to maintain the shape and position accuracy of the ventilator 28. The accuracy of the installation position of the ventilator 28 has an important impact on the ventilation performance; if the ventilator 28 is not installed flat or is deformed after being fixed, the flow resistance of the airflow in the ventilator 28 will increase, reducing the ventilation efficiency; by adjusting the spacing between the U-shaped fixing frame 1 and other U-shaped frames, the straightness and flatness of the ventilator 28 after installation are ensured, so that the airflow can flow smoothly in the ventilator 28, reducing eddy currents and local resistance, thereby optimizing the overall ventilation performance of the ventilation system.

[0021] Embodiment 3: Based on Embodiment 2, this embodiment also includes the following contents: like Figure 5 and Figure 6 As shown, a pair of side plates 18 are fixedly disposed on the inner top walls of the first U-shaped frame 5, the second U-shaped frame 6, and the third U-shaped frame 7, a pair of fixed shafts 20 are rotatably inserted between the bottoms of each pair of side plates 18, and a concentrically fixed widened gear 21 is sleeved in the middle of each fixed shaft 20; A square through hole is provided in the middle of the inner top wall of the first U-shaped frame 5, the second U-shaped frame 6, and the third U-shaped frame 7, and a second hydraulic telescopic cylinder 22 with the telescopic end facing downward is installed inside each square through hole, and a "Zhong"-shaped double-sided rack 23 is fixed at the end of the hydraulic telescopic rod of each second hydraulic telescopic cylinder 22, and each "Zhong"-shaped double-sided rack 23 is meshed and connected with a pair of widened gears 21 on the same side. The "Zhong"-shaped double-sided rack 23 can mesh and drive the pair of widened gears 21 on the same side to rotate relatively, and the bottom end of each "Zhong"-shaped double-sided rack 23 is fixedly connected to the middle of the top surface of the first arc-shaped clamping plate 24 on the same side. The hydraulic telescopic rod of the second hydraulic telescopic cylinder 22 is extended, and the first arc-shaped clamping plate 24 can be driven to translate downward through the "Zhong"-shaped double-sided rack 23, and the first arc-shaped clamping plate 24 can be driven to rest against the top surface of the ventilator 28; A pair of staggered bent connecting plates 19 are fixed to the inner top walls of the first U-shaped frame 5, the second U-shaped frame 6, and the third U-shaped frame 7. A rectangular sliding hole is provided at the bottom end of each bent connecting plate 19. An L-shaped oblique sliding rod 25 is slidably inserted inside each rectangular sliding hole. The bottom end of each L-shaped oblique sliding rod 25 is fixedly connected to the second arc-shaped clamping plate 27 on the same side. A driven rack 26 is fixed to the middle and upper part of each L-shaped oblique sliding rod 25. Each driven rack 26 is meshed and connected with the widening gear 21 on the same side. The widening gear 21 can mesh and drive the driven rack 26 and the L-shaped oblique sliding rod 25 on the same side to slide obliquely upward along the rectangular sliding hole, and drive a pair of second arc-shaped clamping plates 27 to press against the front and rear sides of the bottom of the ventilator 28. The first arc-shaped clamping plate 24 and the pair of second arc-shaped clamping plates 27 are against the outer wall of the ventilator 28, and can fix the ventilator 28 from multiple directions; compared with simple unilateral fixing or point fixing, this multi-directional fixing method can more firmly grasp the ventilator 28 and can better fit the outer wall shape of the ventilator 28; The first arc-shaped clamping plate 24 and a pair of second arc-shaped clamping plates 27 are combined together and can be adaptively adjusted according to the actual curvature of the ventilator 28. Even if there are some tiny irregular deformations in parts of the ventilator 28, the arc-shaped clamping plates can fit tightly to ensure the reliability of fixation.

[0022] Specifically, the working principle and operation method of the present invention are as follows: Step 1: fix the U-shaped fixing frame 1 on the top wall of the coal mine tunnel through a pair of T-shaped fixing plates 2, and adjust the spacing between the U-shaped fixing frame 1 and a pair of first U-shaped frames 5, a pair of second U-shaped frames 6, and a pair of third U-shaped frames 7 according to the length of the ventilation tube 28; Under the driving action of a pair of first hydraulic telescopic cylinders 3, the hydraulic telescopic rod of the first hydraulic telescopic cylinder 3 is shortened, driving the elliptical cross plate 4 to translate toward the T-shaped fixed plate 2 on the same side, and under the limiting action formed by the limiting pin shaft 11 and the elliptical pin hole, the first swing arm 9 is driven to swing outward through the limiting swing arm 10; Step 2: When the first swing arm 9 is hinged and swung outward, the first swing arm 9 and the second swing arm 12 on the same side are hinged, which drives the linkage gear 13 to mesh with each other and rotate in the opposite direction, and then drives the third swing arm 14 on the same side to hinge and swing through the second swing arm 12; At the same time, under the hinged action of the first connecting rod 15 and the second connecting rod 16, and under the hinged action of the second connecting rod 16 and the third connecting rod 17, the second U-shaped frame 6 and the third U-shaped frame 7 are driven to translate in a direction away from the first U-shaped frame 5; Step 3, place the ventilation tube 28 horizontally in the openings of the U-shaped fixed frame 1, a pair of first U-shaped frames 5, a pair of second U-shaped frames 6, and a pair of third U-shaped frames 7; Under the driving action of the three pairs of second hydraulic telescopic cylinders 22, the hydraulic telescopic rods of the second hydraulic telescopic cylinders 22 are extended, driving the first arc-shaped clamping plate 24 to move downward through the "Z"-shaped double-sided rack 23, and driving the first arc-shaped clamping plate 24 to abut against the top surface of the ventilation tube 28; The "Zhong"-shaped double-sided rack 23 meshes and drives a pair of widened gears 21 on the same side to rotate relative to each other. The widened gear 21 then meshes and drives the driven rack 26 and the L-shaped oblique slide rod 25 on the same side to slide obliquely upward along the rectangular slide hole, and drives a pair of second arc-shaped clamping plates 27 to press against the front and rear sides of the bottom of the ventilation duct 28, thereby completing the fixed installation of the ventilation duct 28.

[0023] In the suspended and fixed installation of the ventilation duct of the present invention, adjusting the spacing between U-shaped frames can enhance stability, improve adaptability and installation and maintenance convenience, and optimize ventilation performance; the arc-shaped splint can enhance the fixing effect, protect the duct wall, and improve the sealing performance to a certain extent. These measures can comprehensively ensure that the ventilation duct is installed firmly, operates well, and is durable.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The suspension and fixing structure of the coal mine ventilation duct is characterized by: It comprises a U-shaped fixed frame (1), wherein a pair of symmetrically distributed first U-shaped frames (5) are provided on the left and right sides of the U-shaped fixed frame (1), a second U-shaped frame (6) is provided on the outer side of each of the first U-shaped frames (5), and a third U-shaped frame (7) is provided on the outer side of each of the second U-shaped frames (6); ventilation tubes (28) are placed in the openings of the U-shaped fixed frame (1), the pair of first U-shaped frames (5), the pair of second U-shaped frames (6), and the pair of third U-shaped frames (7); A first arc-shaped clamping plate (24) with its opening facing downward is provided in the middle of the openings of the first U-shaped frame (5), the second U-shaped frame (6) and the third U-shaped frame (7); a pair of symmetrically distributed second arc-shaped clamping plates (27) are provided on the front and rear sides of the openings of the first U-shaped frame (5), the second U-shaped frame (6) and the third U-shaped frame (7); the first arc-shaped clamping plate (24) and the pair of second arc-shaped clamping plates (27) located on the same side are distributed in a circular shape, and the first arc-shaped clamping plate (24) and the pair of second arc-shaped clamping plates (27) are both against the outer wall of the ventilator (28).

2. The suspension and fixing structure of the coal mine ventilation tube according to claim 1 is characterized in that: The four corners of the left and right sides of the U-shaped fixed frame (1) are fixedly provided with fixed connecting plates (8), the outer end of each of the fixed connecting plates (8) is fixedly connected to the first U-shaped frame (5) on the same side, and a pair of symmetrically distributed T-shaped fixing plates (2) are fixedly provided on the front and rear sides of the top of the U-shaped fixed frame (1); A square groove is formed on the inner side of each T-shaped fixing plate (2), a first hydraulic telescopic cylinder (3) with the telescopic end facing outward is installed inside each square groove, and an elliptical cross plate (4) is fixedly provided at the end of the hydraulic telescopic rod of each first hydraulic telescopic cylinder (3).

3. The suspension and fixing structure of the coal mine ventilation duct according to claim 2 is characterized in that: Two pairs of linkage shafts are rotatably inserted on the front and rear sides of the top surface of the second U-shaped frame (6), the top end of each linkage shaft is sleeved with a concentrically fixed linkage gear (13), and adjacent pairs of linkage gears (13) are meshed and connected, and the middle of each linkage shaft is fixedly provided with a second swing arm (12).

4. The suspension fixing structure of the coal mine ventilation tube according to claim 3 is characterized in that: A pair of symmetrically distributed first swing arms (9) are hingedly provided on the front and rear sides of the top surface of the first U-shaped frame (5), and the outer ends of the first swing arms (9) are movably hinged to the outer ends of the second swing arms (12) on the same side. A pair of symmetrically distributed third swing arms (14) are hingedly provided on the front and rear sides of the top surface of the third U-shaped frame (7), and the outer ends of the third swing arms (14) are movably hinged to the outer ends of the second swing arms (12) on the same side.

5. The suspension and fixing structure of the coal mine ventilation tube according to claim 4 is characterized in that: Each of the elliptical cross plates (4) is provided with elliptical pin holes at both ends, the inner section of each of the first swing arms (9) is fixedly provided with a vertically distributed limit swing arm (10), the outer end of each of the limit swing arms (10) is fixedly provided with a limit pin shaft (11), and the top end of each of the limit pin shafts (11) is slidably engaged in the elliptical pin hole on the same side.

6. The suspension and fixing structure of the coal mine ventilation tube according to claim 5 is characterized in that: The second U-shaped frame (6) is hingedly provided with four pairs of second connecting rods (16) symmetrically distributed in an "eight" shape on the front and rear sides, the first U-shaped frame (5) is hingedly provided with four symmetrically distributed first connecting rods (15) on the front and rear sides, the outer end of each first connecting rod (15) is movably hinged to the outer end of the second connecting rod (16) on the same side, and the third U-shaped frame (7) is hingedly provided with four symmetrically distributed third connecting rods (17) on the front and rear sides, the outer end of each third connecting rod (17) is movably hinged to the outer end of the second connecting rod (16) on the same side.

7. The suspension and fixing structure of the coal mine ventilation tube according to claim 6 is characterized in that: A pair of side plates (18) are fixedly disposed on the inner top walls of the first U-shaped frame (5), the second U-shaped frame (6) and the third U-shaped frame (7); a pair of fixed shafts (20) are rotatably inserted between the bottoms of each pair of the side plates (18); and a concentrically fixed widened gear (21) is sleeved on the middle of each fixed shaft (20).

8. The suspension and fixing structure of the coal mine ventilation tube according to claim 7 is characterized in that: A square through hole is provided in the middle of the inner top wall of the first U-shaped frame (5), the second U-shaped frame (6) and the third U-shaped frame (7); a second hydraulic telescopic cylinder (22) with its telescopic end facing downward is installed inside each of the square through holes; a "Z"-shaped double-sided rack (23) is fixedly provided at the end of the hydraulic telescopic rod of each of the second hydraulic telescopic cylinders (22); each of the "Z"-shaped double-sided racks (23) is meshedly connected to a pair of widened gears (21) on the same side; and the bottom end of each of the "Z"-shaped double-sided racks (23) is fixedly connected to the middle of the top surface of the first arc-shaped clamping plate (24) on the same side.

9. The suspension and fixing structure of the coal mine ventilation tube according to claim 8 is characterized in that: A pair of staggered bent connecting plates (19) are fixedly provided on the inner top walls of the first U-shaped frame (5), the second U-shaped frame (6) and the third U-shaped frame (7); a rectangular sliding hole is provided at the bottom end of each bent connecting plate (19); an L-shaped oblique sliding rod (25) is slidably inserted into the interior of each rectangular sliding hole; the bottom end of each L-shaped oblique sliding rod (25) is fixedly connected to the second arc-shaped clamping plate (27) on the same side; a driven rack (26) is fixedly provided at the middle and upper part of each L-shaped oblique sliding rod (25); and each driven rack (26) is meshedly connected to the widened gear (21) on the same side.

10. The method for fixing the suspension fixing structure of the coal mine ventilation tube according to claim 9, characterized in that: The following steps are involved: Step 1: fix the U-shaped fixing frame (1) on the top wall of the coal mine tunnel through a pair of T-shaped fixing plates (2), and adjust the distance between the U-shaped fixing frame (1) and a pair of first U-shaped frames (5), a pair of second U-shaped frames (6), and a pair of third U-shaped frames (7) according to the length of the ventilation tube (28); Under the driving action of a pair of first hydraulic telescopic cylinders (3), the hydraulic telescopic rods of the first hydraulic telescopic cylinders (3) are shortened, driving the elliptical cross plate (4) to translate toward the T-shaped fixed plate (2) on the same side, and under the limiting action formed by the limiting pin shaft (11) and the elliptical pin hole, the first swing arm (9) is driven to swing outward in an articulated manner through the limiting swing arm (10); Step 2: When the first swing arm (9) swings outwardly in a hinged manner, under the hinged action between the first swing arm (9) and the second swing arm (12) on the same side, the driving linkage gears (13) rotate in opposite directions while meshing with each other, and then drive the third swing arm (14) on the same side to swing in a hinged manner through the second swing arm (12). Meanwhile, under the hinged action between the first connecting rod (15) and the second connecting rod (16), and under the hinged action between the second connecting rod (16) and the third connecting rod (17), drive the second U-shaped frame (6) and the third U-shaped frame (7) to translate in a direction away from the first U-shaped frame (5). Step 3: Horizontally place the ventilation cylinder (28) within the openings of the U-shaped fixing frame (1), a pair of first U-shaped frames (5), a pair of second U-shaped frames (6), and a pair of third U-shaped frames (7). Under the driving action of the three pairs of second hydraulic telescopic cylinders (22), the hydraulic telescopic rods of the second hydraulic telescopic cylinders (22) extend, drive the first arc-shaped clamping plate (24) to translate downward through the "middle"-shaped double-sided rack (23), and drive the first arc-shaped clamping plate (24) to abut against the top surface of the ventilation cylinder (28). The "middle"-shaped double-sided rack (23) meshes to drive a pair of widened gears (21) on the same side to rotate relatively, and the widened gears (21) then mesh to drive the driven rack (26) and the L-shaped inclined slide bar (25) on the same side to slide obliquely upward along the rectangular slide holes, and drive a pair of second arc-shaped clamping plates (27) to abut against the front and rear sides of the bottom surface of the ventilation cylinder (28), thereby completing the fixed installation of the ventilation cylinder (28).

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