Accidental falling speed reduction structure for mine hoist

Abstract

The invention relates to the technical field of mine hoist corollary equipment, in particular to an accidental falling speed reduction structure for a mine hoist, which comprises four supporting columns distributed around a mine wellhead, a mounting frame body is fixedly mounted among the four supporting columns, a rope containing roller driven by a motor is arranged in the mounting frame body, and a rope containing groove is formed in the rope containing roller. One end of the rope containing roller is provided with a speed measuring assembly exposed out of the installation frame body, a sensing cover body is arranged on the side, close to the speed measuring assembly, of the installation frame body, a vibration sensor is arranged on the sensing cover body, and the other end of the rope containing roller is provided with a buffering brake device located on the inner side of the installation frame body. An electric telescopic rod used for controlling whether the rope containing roller rotates or not is arranged between the mounting frame body and the buffer braking device, and a preparation driving structure located in the mounting frame body is arranged on one side of the buffer braking device. According to the accidental falling speed reduction structure for the mine hoist, accidental out-of-control of the rope containing roller can be effectively monitored, the anti-falling effect is achieved through flexible speed reduction, and secondary damage caused by accidents is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of supporting equipment for mine hoists, and in particular to an accidental fall deceleration structure for mine hoists. Background Art

[0002] If a mine hoist encounters unexpected situations during operation, such as brake failure or other emergency situations, it may fall. In order to ensure safety, mine hoists are usually equipped with special safety devices, one of which is an anti-fall protection device. This device can quickly intervene when an abnormal situation of the hoist is detected, thereby avoiding or reducing potential injuries and losses; The existing technology usually achieves anti-falling by a toothed anti-falling device, which consists of a toothed claw and a driving part. When the lifting wire rope or the connecting device breaks, the spring extends, causing the main boom to move down, pushing the lever system, and the toothed claw moves up and penetrates into the mine, generating a braking force to cause the cage to decelerate sharply and stop. In actual operation, accidental rapid falls are often caused by the breakage of the connection device between the driving motor and the rope drum, which causes the rope drum to rotate rapidly due to the free fall of the hoisted object. At this time, the above-mentioned existing technology is used to prevent the fall. Due to the excessive deceleration force, it is easy to cause secondary damage to the wire rope or the rope drum. Secondly, after the connection device between the driving motor and the rope drum breaks, the existing technology uses the means of waiting for maintenance or using an additional emergency motor to lift the hoisted object to avoid a secondary fall. However, since the equipment is damaged at this time and it is unclear whether the wire rope is safe, the continuous power output of the emergency motor is required, which will also cause a secondary fall. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an accidental fall deceleration structure for a mine hoist, which can effectively monitor the accidental loss of control of a rope drum and flexibly decelerate to achieve an anti-fall effect, thereby avoiding secondary injuries caused by accidents.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: an accidental fall deceleration structure for a mine hoist, which includes four support columns distributed around the mine shaft mouth, a mounting frame is fixedly installed between the four support columns, a rope containing drum driven by a motor is provided in the mounting frame, a speed measuring component exposed from the mounting frame is provided at one end of the rope containing drum, a sensing cover is provided on the side of the mounting frame close to the speed measuring component, a vibration sensor is provided on the sensing cover, a buffer braking device is provided on the other end of the rope containing drum, an electric telescopic rod for controlling whether the rope containing drum rotates is provided between the mounting frame and the buffer braking device, and a preparatory drive structure located inside the mounting frame is provided on one side of the buffer braking device.

[0005] As an improvement, the rope containing drum comprises a rope containing drum body, one end of which is fixedly connected to a rotating wheel with anti-slip grooves on the outer edge, the rotating wheel is rotatably connected to the mounting frame, and the other end is provided with a baffle, and the side of the baffle away from the rope containing drum body is provided with an axle body rotatably connected to the mounting frame.

[0006] As an improvement, the speed measuring assembly includes a first slip ring slidably connected to the shaft body, a limit plate is provided at the end of the shaft body away from the baffle, a second slip ring fixedly connected to the shaft body is provided at the end of the shaft body close to the limit plate, the upper and lower ends of the first slip ring are hinged with fork arms, the upper and lower ends of the second slip ring are hinged with connecting rods, the middle part of the connecting rod is rotatably connected to the two ends of the fork arms, a counterweight ball is provided at the end of the connecting rod away from the second slip ring, the surface of the counterweight ball is rough, and a first spring located on the shaft body is provided between the first slip ring and the second slip ring.

[0007] As an improvement, the sensor cover is a round cover with a semi-elliptical cross section, and the inner wall of the sensor cover is rough.

[0008] As an improvement, the buffer brake device includes a plate body fixedly mounted in a mounting frame, and a circular groove for rotationally connecting the rotating wheel is provided in the plate body.

[0009] As an improvement, the buffer brake device also includes a special-shaped groove located in the plate body, the special-shaped groove is communicated with the circular groove, and a deceleration brake that can move in the special-shaped groove is provided in the special-shaped groove.

[0010] As an improvement, the deceleration brake includes a T-shaped slide rail that can move in the special-shaped groove, a fixed plate is provided at one end of the T-shaped slide rail close to the circular groove, one side of the fixed plate is rotatably connected to two connecting arms that are symmetrically distributed up and down, and the end of the connecting arm away from the fixed plate is rotatably connected to an arc-shaped clamping claw, and limit columns are provided at the upper and lower ends of one side of the special-shaped groove close to the circular groove, and the arc-shaped clamping claw is rotatably connected to the limit column at one end away from the T-shaped slide rail.

[0011] As an improvement, a limiting slide is provided at one end of the fixed plate away from the T-shaped slide rail, and a trapezoidal brake plate located between the two connecting arms is slidably connected to the limiting slide. The trapezoidal brake plate is slidably connected to the limiting slide through the slide rail, and a spring mounting plate is provided at one end of the trapezoidal brake plate close to the T-shaped slide rail, and a second spring is provided between the spring mounting plate and the T-shaped slide rail.

[0012] As an improvement, the arc-shaped clamping jaw and the trapezoidal brake plate are both provided with an arc surface matching the circular groove at one end close to the circular groove, and the arc surface is provided with anti-skid grooves. The anti-skid grooves of the trapezoidal brake plate have a greater friction coefficient than the anti-skid grooves of the arc-shaped clamping jaw.

[0013] As an improvement, the preparatory drive structure includes a worm gear ring fixedly connected to the part of the wheel exposed from the plate body, a worm rotatably mounted on the plate body is connected below the worm gear ring, a worm wheel rotatably connected to the plate body is connected below the worm, a special worm for intermittent power output is connected below the worm wheel, and a preparatory motor is connected to one end of the special worm.

[0014] As an improvement, the special worm gear includes a hollow worm gear body, a hollow tube body is provided at one end of the hollow worm gear body, a limit slider is provided in the hollow tube body which penetrates the hollow tube body and is exposed at one end, the special worm gear also includes a special-shaped sleeve fixedly mounted on the plate body, the special-shaped sleeve is sleeved with the hollow tube body, an arc-shaped section is provided at one end of the special-shaped sleeve close to the limit slider, a transmission shaft connected to the output shaft of the preparation motor is rotatably connected between the hollow worm gear body and the hollow tube body, a limit slide groove is provided on the transmission shaft for the limit slider to move, the transmission shaft is rotatably connected to the plate body at one end away from the special-shaped sleeve, and a third spring is provided between the connecting end of the transmission shaft and the plate body and the hollow worm gear body.

[0015] After adopting the above structure, the present invention has the following beneficial effects: 1. After the connection structure between the driving motor and the rope drum is broken, the rope drum rotates rapidly due to the free fall of the hoisted object. The first slip ring is pulled by the counterweight ball to overcome the pretension of the first spring, so that the opening amplitude of the connecting rod becomes larger. The counterweight ball contacts the inner wall of the sensor cover and generates friction vibration. On the one hand, the vibration sensor obtains a signal, and on the other hand, the rotation of the second slip ring can be suppressed to a certain extent, thereby reducing the rotation speed of the rope drum body and achieving a deceleration effect. 2. The telescopic end of the electric telescopic rod extends out, and the T-shaped slide rail continues to move toward the circular groove in the special-shaped groove, so that the angle between the two connecting arms becomes smaller, thereby pushing the trapezoidal brake plate to move toward the circular groove. When the arc surface with anti-slip patterns of the arc-shaped clamping claw is completely in contact with the rotating wheel, the trapezoidal brake plate is also completely in contact with the rotating wheel. In this process, the friction coefficient gradually increases, which plays a role in slowing down and effectively preventing secondary damage caused by excessive deceleration; 3. A preparatory drive structure is provided, in which a special worm gear is provided for intermittent power output. Compared with the continuous power output of the prior art, it can better enable the staff to observe the safety status of the wire rope, thereby avoiding secondary falls caused by unclear safety status of the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an accidental fall deceleration structure for a mine hoist according to the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of an accidental fall deceleration structure for a mine hoist according to the present invention. Figure 2 .

[0018] Figure 3 The invention discloses a structural schematic diagram of a mounting frame of an accidental fall deceleration structure for a mine hoist.

[0019] Figure 4 The invention discloses a structural schematic diagram of a rope-containing drum of an accidental fall deceleration structure for a mine hoist.

[0020] Figure 5 The invention discloses a structural schematic diagram of a speed measuring component of an accidental fall deceleration structure for a mine hoist.

[0021] Figure 6 The invention discloses a schematic diagram of the structural decomposition of a speed measuring component of an accidental fall deceleration structure for a mine hoist.

[0022] Figure 7 It is a cross-sectional view of a speed measuring component of an accidental fall deceleration structure for a mine hoist according to the present invention.

[0023] Figure 8 The invention discloses a structural schematic diagram of a buffer brake device of an accidental fall deceleration structure for a mine hoist.

[0024] Fig. 9 The invention discloses a structural schematic diagram of a deceleration brake of an accidental fall deceleration structure for a mine hoist.

[0025] Fig.10 The invention discloses a schematic diagram of the structure decomposition of a deceleration brake of an accidental fall deceleration structure for a mine hoist.

[0026] Fig.11 The invention discloses a structural schematic diagram of a special-shaped groove of an accidental fall deceleration structure for a mine hoist.

[0027] Fig.12 The present invention is a schematic structural diagram of a preparatory drive structure of an accidental fall deceleration structure for a mine hoist.

[0028] Fig.13 The invention discloses a structural schematic diagram of a special worm of an accidental fall reduction structure for a mine hoist.

[0029] As shown in the figure: 1. Support column; 2. Mounting frame; 3. Rope drum; 301. Rope drum body; 302. Baffle; 303. Rotating wheel; 304. Axle; 305. Limiting plate; 4. Speed ​​measuring assembly; 401. First slip ring; 402. Second slip ring; 403. Fork arm; 404. Connecting rod; 405. Counterweight ball; 406. First spring; 5. Sensor cover; 6. Vibration sensor; 7. Buffer brake device; 701. Plate; 702. Round groove; 703. Special-shaped groove; 704. Speed ​​reduction brake; 7041. T-type slide rail; 704 2. Fixed plate; 7043. Connecting arm; 7044. Arc-shaped clamping claw; 7045. Trapezoidal brake plate; 7046. Spring mounting plate; 7047. Second spring; 7048. Limit slideway; 705. Limit column; 8. Electric telescopic rod; 9. Preparatory drive structure; 901. Worm wheel; 902. Worm; 903. Worm wheel; 904. Special worm; 9041. Hollow worm body; 9042. Hollow tube body; 9043. Limit slide block; 9044. Transmission shaft; 9045. Special-shaped sleeve; 9046. Third spring; 9047. Limit slideway. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0031] Combined with Figure 2 , Attachment Figure 3 and attached Figure 4 : A structure for decelerating an accidental fall for a mine hoist, comprising four support columns 1 distributed around a mine wellhead, a mounting frame 2 fixedly mounted between the four support columns 1, a rope-containing drum 3 driven by a motor disposed in the mounting frame 2, the rope-containing drum 3 comprising a rope-containing drum body 301, a rotating wheel 303 with anti-slip grooves on the outer edge of the rope-containing drum body 301 being fixedly connected to one end of the rope-containing drum body 301, the rotating wheel 303 being rotatably connected to the mounting frame 2, a baffle plate 302 being disposed at the other end, and a shaft 304 rotatably connected to the mounting frame 2 being disposed on the side of the baffle plate 302 away from the rope-containing drum body 301.

[0032] Through this structure, the rope drum body 301 is used to wind the wire rope. The rotation of the rope drum body 301 can drive the winding wire rope to lift objects. The support column 1 is located at the mine shaft entrance, and the mounting frame 2 is higher than the mine shaft entrance, and is used to remove the hoisted objects from between two adjacent support columns 1.

[0033] Combined with Figure 1 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 : The rope holding drum 3 is provided with a speed measuring assembly 4 exposed from the mounting frame 2 at one end, a sensing cover 5 is provided on the mounting frame 2 near the speed measuring assembly 4, a vibration sensor 6 is provided on the sensing cover 5, the speed measuring assembly 4 includes a first slip ring 401 slidably connected to the shaft 304, a limit plate 305 is provided at one end of the shaft 304 away from the baffle 302, a second slip ring 402 fixedly connected to the shaft 304 is provided on one end of the shaft 304 near the limit plate 305, and the first slip ring 401 The upper and lower ends of the first slip ring 401 are hinged with fork arms 403, the upper and lower ends of the second slip ring 402 are hinged with connecting rods 404, the middle part of the connecting rod 404 is rotatably connected to the two ends of the fork arms 403, and the end of the connecting rod 404 away from the second slip ring 402 is provided with a counterweight ball 405, and the surface of the counterweight ball 405 is rough. A first spring 406 located on the shaft body 304 is provided between the first slip ring 401 and the second slip ring 402, and the sensor cover body 5 is a round cover with a semi-elliptical cross-section, and the inner wall of the sensor cover body 5 is rough.

[0034] With this structure, under normal conditions, since the second slip ring 402 is fixedly connected to the shaft body 304, the second slip ring 402 rotates along with the shaft body 304 and the rope drum body 301 driven by the driving motor, thereby driving the first slip ring 401 to rotate through the connecting rod 404 and the fork arm 403. At this time, while the weight ball 405 rotates along the axis direction of the shaft body 304, the connecting rod 404 is slightly opened by the eccentric force, and the first slip ring 401 has a tendency to move toward the second slip ring 402, and maintains balance under the pre-tension of the first spring 406. After the connection structure between the driving motor and the rope drum is broken, the rope drum rotates rapidly due to the free fall of the hoisted object, causing the eccentric force provided by the counterweight ball 405 to increase sharply. The first slip ring 401 is pulled by the counterweight ball 405 to overcome the pre-tension of the first spring 406, so that the opening amplitude of the connecting rod 404 becomes larger. At this time, the counterweight ball 405 contacts the inner wall of the sensor cover 5, generating friction vibration, so that the vibration sensor 6 obtains a signal. The faster the rope drum body 301 rotates, the higher the amplitude frequency is, and the vibration sensor 6 can collect and transmit the signal. The vibration sensor 6 is a prior art, so it is not described here. In addition, since the inner wall of the sensor cover 5 is rough, sliding friction is generated with the counterweight ball 405, which can also inhibit the rotation of the second slip ring 402 to a certain extent, thereby reducing the rotation speed of the rope drum body 301 and playing a deceleration role.

[0035] Combined with Figure 1 , Attachment Figure 4 , Attachment Figure 8 , Attachment Fig. 9 , Attachment Fig.10 and attached Fig.11 : The other end of the rope drum 3 is provided with a buffer brake device 7 located inside the mounting frame 2, and the buffer brake device 7 includes a plate body 701 fixedly installed in the mounting frame 2, and a circular groove 702 for the rotating wheel 303 to be rotatably connected is provided in the plate body 701; The buffer brake device 7 also includes a special-shaped groove 703 located in the plate body 701, the special-shaped groove 703 is connected to the circular groove 702, and a deceleration brake 704 is provided in the special-shaped groove 703 and can move in the special-shaped groove 703; The deceleration brake 704 includes a T-shaped slide rail 7041 that can move in the special-shaped groove 703, and a fixed plate 7042 is provided at one end of the T-shaped slide rail 7041 close to the circular groove 702. One side of the fixed plate 7042 is rotatably connected to two connecting arms 7043 that are symmetrically distributed up and down. The end of the connecting arm 7043 away from the fixed plate 7042 is rotatably connected to an arc-shaped clamping claw 7044, and the upper and lower ends of the side of the special-shaped groove 703 close to the circular groove 702 are provided with limiting columns 705, and the end of the arc-shaped clamping claw 7044 away from the T-shaped slide rail 7041 is rotatably connected to the limiting column 705. The fixing plate 7042 is provided with a limiting slideway 7048 at one end away from the T-shaped slide rail 7041, and a trapezoidal brake plate 7045 located between the two connecting arms 7043 is slidably connected to the limiting slideway 7048. The trapezoidal brake plate 7045 is slidably connected to the limiting slideway 7048 through a slide rail, and a spring mounting plate 7046 is provided at one end of the trapezoidal brake plate 7045 close to the T-shaped slide rail 7041, and a second spring 7047 is provided between the spring mounting plate 7046 and the T-shaped slide rail 7041; The arc-shaped clamping jaw 7044 and the trapezoidal brake plate 7045 are both provided with an arc surface matching the circular groove 702 at one end close to the circular groove 702, and the arc surface is provided with anti-skid patterns. The anti-skid patterns of the trapezoidal brake plate 7045 have a greater friction coefficient than the anti-skid patterns of the arc-shaped clamping jaw 7044. An electric telescopic rod 8 for controlling whether the rope-containing drum 3 rotates is provided between the mounting frame 2 and the buffer brake device 7 .

[0036] Through the above structure, after the connection structure between the driving motor and the rope drum is broken, the rope drum rotates rapidly due to the free fall of the hoisted object, and the vibration sensor 6 transmits a signal to the electric telescopic rod 8 and controls the telescopic end of the electric telescopic rod 8 to extend. This is a prior art, so it is not described here in detail, so that the T-shaped slide rail 7041 moves toward the circular groove 702 in the special-shaped groove 703. During the movement, the fixed plate 7042 is pushed to move, so that the connecting arm 7043 drives the arc-shaped clamping claw 7044 to rotate around the limiting column 705 toward the edge of the circular groove 702, so that the arc surface with anti-slip grooves of the two arc-shaped clamping claws 7044 and the rotating wheel 303 are increased in contact area, so that the rotating wheel 303 is decelerated, and then the rope drum body 301 is decelerated; The telescopic end of the electric telescopic rod 8 continues to extend, and the T-shaped slide rail 7041 continues to move toward the circular groove 702 in the special-shaped groove 703, so that the angle between the two connecting arms 7043 becomes smaller, thereby pushing the trapezoidal brake plate 7045 to move toward the circular groove 702. When the arc surface with anti-slip grooves of the arc-shaped clamping claw 7044 is completely in contact with the rotating wheel 303, the trapezoidal brake plate 7045 is also completely in contact with the rotating wheel 303. At this time, the braking effect reaches the maximum, thereby stopping the rope drum body 301 from rotating.

[0037] Combined with Figure 1 , Attachment Figure 4 , Attachment Figure 8 , Attachment Fig.12 and attached Fig.13 : A preparatory drive structure 9 located inside the mounting frame 2 is provided on one side of the buffer brake device 7. The preparatory drive structure 9 includes a worm wheel 901 fixedly connected to the portion of the rotating wheel 303 exposed from the plate 701, a worm 902 rotatably mounted on the plate 701 is connected below the worm wheel 901, a worm wheel 903 rotatably connected to the plate 701 is connected below the worm 902, a special worm 904 capable of intermittently outputting power is connected below the worm wheel 903, and a preparatory motor is connected to one end of the special worm 904; The special worm 904 includes a hollow worm body 9041, one end of which is provided with a hollow tube body 9042, and a limit slider 9043 is provided in the hollow tube body 9042, which penetrates the hollow tube body 9042 and is exposed at one end. The special worm 904 also includes a special-shaped sleeve 9045 fixedly mounted on the plate body 701, and the special-shaped sleeve 9045 is sleeved with the hollow tube body 9042, and the special-shaped sleeve 9045 is provided at one end close to the limit slider 9043. Arc-shaped section, a transmission shaft 9044 connected to the output shaft of the preparatory motor is rotatably connected inside the hollow worm body 9041 and the hollow tube body 9042, and a limiting slide groove 9047 is provided on the transmission shaft 9044 for the movement of the limiting slider 9043. The transmission shaft 9044 is rotatably connected to the plate body 701 at one end away from the special-shaped sleeve 9045, and a third spring 9046 is provided between the connecting end of the transmission shaft 9044 and the plate body 701 and the hollow worm body 9041.

[0038] Through the above structure, after the connection structure between the driving motor and the rope drum is broken, the preparatory motor is started, and the output shaft of the preparatory motor drives the transmission shaft 9044 to rotate. While the transmission shaft 9044 rotates, the limiting function between the limiting slide groove 9047 and the limiting slider 9043 drives the hollow tube body 9042 to rotate, thereby driving the hollow worm body 9041 to rotate, and then driving the worm wheel 903 to rotate. During this period, the third spring 9046 always provides a pre-tensioning force for the hollow worm body 9041 to move toward the special-shaped sleeve 9045, so that the limiting function The slider 9043 is always in close contact with the arc section of the special-shaped sleeve 9045. When the limit slider 9043 moves from the upper dead point of the arc section of the special-shaped sleeve 9045 to the lower dead point, the hollow worm body 9041 moves toward the special-shaped sleeve 9045, thereby failing to provide power output to the worm wheel 903. At this stage, the worm wheel 903 stops running. When the limit slider 9043 moves from the lower dead point of the arc section of the special-shaped sleeve 9045 to the upper dead point, the hollow worm body 9041 moves away from the special-shaped sleeve 9045, thereby driving the worm wheel 903 to rotate. The rotation of the worm wheel 903 drives the worm 902 to rotate, thereby driving the worm wheel ring 901 to rotate, and then driving the rotating wheel 303 to rotate, thereby achieving sequential intermittent lifting, making it easy to observe the safety of the wire rope and preventing a secondary fall caused by unclear safety of the wire rope during continuous power output.

[0039] When the present invention is implemented, during normal operation, since the second slip ring 402 is fixedly connected to the shaft body 304, the second slip ring 402 rotates along with the shaft body 304 and the rope drum body 301 driven by the driving motor, thereby driving the first slip ring 401 to rotate through the connecting rod 404 and the fork arm 403. At this time, the weighted ball 405 rotates along the axis direction of the shaft body 304, and the connecting rod 404 is slightly opened by the eccentric force, and the first slip ring 401 has a tendency to move toward the second slip ring 402, and maintains balance under the pre-tension of the first spring 406; After the connection structure between the driving motor and the rope drum is broken, the rope drum rotates rapidly due to the free fall of the hoisted object, causing the eccentric force provided by the counterweight ball 405 to increase sharply. The first slip ring 401 is pulled by the counterweight ball 405 to overcome the pretension of the first spring 406, so that the opening amplitude of the connecting rod 404 becomes larger. At this time, the counterweight ball 405 contacts the inner wall of the sensor cover 5, generating friction vibration, so that the vibration sensor 6 obtains a signal. The faster the rope drum body 301 rotates, the higher the amplitude frequency is, and the vibration sensor 6 can collect and transmit the signal. The vibration sensor 6 transmits a signal to the electric telescopic rod 8 and controls the telescopic end of the electric telescopic rod 8 to extend. This is a prior art, so it is not described here in detail, so that the T-shaped slide rail 7041 moves in the special-shaped groove 703 toward the circular groove 702. During the movement, the fixed plate 7042 is pushed to move, so that the connecting arm 7043 drives the arc-shaped clamping claw 7044 to rotate around the limiting column 705 toward the edge of the circular groove 702, so that the arc surface with anti-slip patterns of the two arc-shaped clamping claws 7044 and the rotating wheel 303 are attached. The contact area increases, thereby slowing down the rotating wheel 303, and then slowing down the rope drum body 301; The telescopic end of the electric telescopic rod 8 continues to extend, and the T-shaped slide rail 7041 continues to move toward the circular groove 702 in the special-shaped groove 703, so that the angle between the two connecting arms 7043 becomes smaller, thereby pushing the trapezoidal brake plate 7045 to move toward the circular groove 702. When the arc surface with anti-slip grooves of the arc-shaped clamping claw 7044 is completely in contact with the rotating wheel 303, the trapezoidal brake plate 7045 is also completely in contact with the rotating wheel 303. At this time, the braking effect reaches the maximum, so that the rope drum body 301 stops rotating; The preparation motor is started, and the output shaft of the preparation motor drives the transmission shaft 9044 to rotate. When the transmission shaft 9044 rotates, the limiting function between the limiting slide groove 9047 and the limiting slider 9043 drives the hollow tube body 9042 to rotate, thereby driving the hollow worm body 9041 to rotate, and then driving the worm wheel 903 to rotate. During this period, the third spring 9046 always provides a pre-tension for the hollow worm body 9041 to move toward the special-shaped sleeve 9045, so that the limiting slider 9043 is always in contact with the special-shaped sleeve 904. 5, when the limit slider 9043 moves from the upper dead point of the arc section of the special-shaped sleeve 9045 to the lower dead point, the hollow worm body 9041 moves toward the special-shaped sleeve 9045, thereby failing to provide power output to the worm gear 903. At this stage, the worm gear 903 stops running. When the limit slider 9043 moves from the lower dead point of the arc section of the special-shaped sleeve 9045 to the upper dead point, the hollow worm body 9041 moves away from the special-shaped sleeve 9045, thereby driving the worm gear 903 to rotate. The rotation of the worm wheel 903 drives the worm 902 to rotate, thereby driving the worm wheel ring 901 to rotate, and then driving the rotating wheel 303 to rotate, thereby achieving sequential intermittent lifting, making it easy to observe the safety of the wire rope and preventing a secondary fall caused by unclear safety of the wire rope during continuous power output.

[0040] The working principle of the present invention is as follows: when the connection structure between the driving motor and the rope drum is broken, the rope drum rotates rapidly due to the free fall of the hoisted object, causing the eccentric force provided by the counterweight ball 405 to increase sharply, so that the vibration sensor 6 receives a signal to control the electric telescopic rod 8, thereby changing the braking effect of the buffer brake device 7 on the rotating wheel 303, and then the preparatory motor outputs power to the preparatory drive structure 9, and the preparatory drive structure 9 is intermittently lifted, and the state of the wire rope can be easily observed during the lifting.

[0041] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In general, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can creatively design a structure and implementation method similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. An accidental fall deceleration structure for a mine hoist, comprising a support column (1), a mounting frame (2), a rope drum (3) being arranged in the mounting frame (2), and characterized in that: A speed measuring assembly (4) is provided at one end of the rope holding drum (3); a sensing cover (5) is provided at one side of the mounting frame (2); a vibration sensor (6) is provided on the sensing cover (5); a buffer brake device (7) is provided at the other end of the rope holding drum (3); an electric telescopic rod (8) is provided between the mounting frame (2) and the buffer brake device (7); and a preparatory drive structure (9) located inside the mounting frame (2) is provided at one side of the buffer brake device (7); The rope holding drum (3) comprises a rope holding drum body (301), one end of the rope holding drum body (301) is fixedly connected to a rotating wheel (303) having an outer edge with anti-slip grooves, the rotating wheel (303) is rotatably connected to the mounting frame (2), and the other end is provided with a baffle (302), and a shaft (304) rotatably connected to the mounting frame (2) is provided on the side of the baffle (302) away from the rope holding drum body (301); The speed measuring assembly (4) comprises a first slip ring (401) slidably connected to the shaft body (304); a limit plate (305) is provided at one end of the shaft body (304) away from the baffle plate (302); a second slip ring (402) fixedly connected to the shaft body (304) is provided at one end of the shaft body (304) close to the limit plate (305); a fork arm (403) is hingedly connected at the upper and lower ends of the first slip ring (401); a connecting rod (404) is hingedly connected at the upper and lower ends of the second slip ring (402); a middle portion of the connecting rod (404) is rotatably connected to two end portions of the fork arm (403); a weight ball (405) is provided at one end of the connecting rod (404) away from the second slip ring (402); and a first spring (406) located on the shaft body (304) is provided between the first slip ring (401) and the second slip ring (402); The buffer brake device (7) comprises a plate body (701) fixedly mounted in the mounting frame (2); the preparatory drive structure (9) comprises a worm wheel (901) fixedly connected to the portion of the rotating wheel (303) exposed from the plate body (701); a worm (902) rotatably mounted on the plate body (701) is connected below the worm wheel (901); a worm wheel (903) rotatably connected to the plate body (701) is connected below the worm wheel (902); a special worm (904) capable of intermittently outputting power is connected below the worm wheel (903); and a preparatory motor is connected to one end of the special worm (904).

2. The accidental fall deceleration structure for a mine hoist according to claim 1, characterized in that: The surface of the weighted ball (405) is rough, the sensor cover (5) is a round cover with a semi-elliptical cross-section, and the inner wall of the sensor cover (5) is rough.

3. The accidental fall deceleration structure for a mine hoist according to claim 2, characterized in that: The plate body (701) is provided with a circular groove (702) for rotationally connecting the rotating wheel (303), and the buffer brake device (7) further comprises a special-shaped groove (703) located in the plate body (701), the special-shaped groove (703) is communicated with the circular groove (702), and a deceleration brake (704) is provided in the special-shaped groove (703) and can move in the special-shaped groove (703).

4. The accidental fall deceleration structure for a mine hoist according to claim 3, characterized in that: The deceleration brake (704) comprises a T-shaped slide rail (7041) movable in the special-shaped groove (703); a fixed plate (7042) is provided at one end of the T-shaped slide rail (7041) close to the circular groove (702); one side of the fixed plate (7042) is rotatably connected to two connecting arms (7043) symmetrically distributed up and down; one end of the connecting arm (7043) away from the fixed plate (7042) is rotatably connected to an arc-shaped clamping claw (7044); limiting columns (705) are provided at both ends of the side of the special-shaped groove (703) close to the circular groove (702); one end of the arc-shaped clamping claw (7044) away from the T-shaped slide rail (7041) is rotatably connected to the limiting column (705); and one end of the T-shaped slide rail (7041) exposed from the special-shaped groove (703) is fixedly connected to the telescopic end of the electric telescopic rod (8).

5. The accidental fall deceleration structure for a mine hoist according to claim 4, characterized in that: A limiting slideway (7048) is provided at one end of the fixed plate (7042) away from the T-shaped slide rail (7041); a trapezoidal brake plate (7045) located between the two connecting arms (7043) is slidably connected to the limiting slideway (7048); the trapezoidal brake plate (7045) is slidably connected to the limiting slideway (7048); a spring mounting plate (7046) is provided at one end of the trapezoidal brake plate (7045) close to the T-shaped slide rail (7041); a second spring (7047) is provided between the spring mounting plate (7046) and the T-shaped slide rail (7041).

6. The accidental fall deceleration structure for a mine hoist according to claim 5, characterized in that: The arc-shaped clamping jaw (7044) and the trapezoidal brake plate (7045) are both provided with an arc surface matching the circular groove (702) at one end close to the circular groove (702), and the arc surface is provided with anti-skid patterns. The anti-skid patterns of the trapezoidal brake plate (7045) have a greater friction coefficient than the anti-skid patterns of the arc-shaped clamping jaw (7044).

7. The accidental fall deceleration structure for a mine hoist according to claim 1, characterized in that: The special worm (904) comprises a hollow worm body (9041), one end of the hollow worm body (9041) is provided with a hollow tube body (9042), the hollow tube body (9042) is provided with a limit slider (9043) penetrating the hollow tube body (9042) and exposed at one end, and the special worm (904) further comprises a special-shaped sleeve (9045) fixedly mounted on the plate body (701), the special-shaped sleeve (9045) is sleeved with the hollow tube body (9042), and one end of the special-shaped sleeve (9045) close to the limit slider (9043) is provided with The hollow worm body (9041) and the hollow tube body (9042) are rotatably connected to a transmission shaft (9044) connected to the output shaft of the preparatory motor. The transmission shaft (9044) is provided with a limit slide groove (9047) for allowing a limit slide block (9043) to move. The end of the transmission shaft (9044) away from the special-shaped sleeve (9045) is rotatably connected to the plate body (701). A third spring (9046) is provided between the connecting end of the transmission shaft (9044) and the plate body (701) and the hollow worm body (9041).

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