Novel polyurethane roller for coal mine

Abstract

The utility model provides a novel polyurethane roller for a coal mine, which comprises a door plate, a hinge plate, a base and a grating switch, a connecting ring and a connecting plate are additionally arranged at two ends of a roller skin, and a hollow cavity is stably connected and blocked by a fastener, so that the structure of the roller skin is more stable, and the roller skin can better bear material impact and extrusion. The first supporting plate and the second supporting plate play a key role, the bottoms of the first supporting plate and the second supporting plate are connected with the outer wall of the sleeve, the side portions of the first supporting plate and the second supporting plate are attached to the wall face of the connecting plate, a stable triangular supporting structure is formed, connection between the connecting plate and the sleeve is greatly strengthened, stress is dispersed, and part damage caused by local stress concentration is avoided. The distance between the sleeve and the rotating base is limited, operation shaking is prevented, ore is prevented from falling into the gap between the transmission shaft and the sleeve, stable transmission is maintained, the overall supporting strength is improved in all directions, and the device is more suitable for the complex coal mine operation environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine conveying equipment technical field especially relates to a novel polyurethane drum for coal mine. BACKGROUND

[0002] In coal mining operation, the application purpose of polyurethane drum is remarkable. On the one hand, it is used for conveying coal, and by virtue of excellent wear resistance, it can withstand the friction and impact of coal for a long time, reduce equipment wear and tear, ensure the continuity and efficiency of coal transportation, reduce downtime caused by frequent replacement of parts, and improve the overall efficiency of mining. On the other hand, its good corrosion resistance can resist the erosion of humid, sulfur-containing and other harsh environments in coal mine, prolonging the service life of the drum.

[0003] The polyurethane drum is mainly composed of three parts. The drum skin is the outermost layer, which is made of high-quality metal material to provide the basic framework and sufficient strength for the drum to support the weight of coal and operating stress. The middle is the polyurethane rubber layer, which is the core part. The polyurethane material has the advantages of high elasticity and high wear resistance, closely adheres to the drum skin, not only increases the friction force to prevent coal from slipping, but also buffers the impact of coal falling. The shaft core is located at the center of the drum, which is usually made of high-strength alloy steel, responsible for connecting the power device and the whole drum, accurately transmitting driving force to drive the drum to operate stably and ensure the stable conveying of coal.

[0004] The existing polyurethane drum has shortcomings in strength. Although the drum skin is made of metal material to provide basic support, it is difficult to buffer and disperse stress when it is frequently impacted by large coal gangue in the complex working conditions of coal mine. The outer metal drum skin has limited ability to buffer and disperse stress, and is prone to local deformation and indentation, affecting the stability and service life of the drum. As the key part of power transmission, the shaft core is under high load for a long time. Sometimes, high-strength alloy steel material is also difficult to cope with complex stress changes, which may cause fatigue damage and weaken the overall strength. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model wants to solve the technical problem: how to provide a novel polyurethane drum for coal mine to improve the overall strength and realize stable and reliable conveying of ore materials.

[0006] To achieve the above purpose, the utility model provides a novel polyurethane drum for coal mine, which comprises a drum skin, a connecting ring, a connecting plate, a first supporting plate, a second supporting plate, a transmission shaft and a rotating seat.

[0007] The drum skin is in the shape of a cylinder, a hollow cavity is formed in the inside of the drum skin, and the connecting ring is arranged at both ends of the inside of the drum skin. The connecting plate and the connecting ring are fixedly connected through fasteners, and the hollow cavity is blocked by the connecting plate at both ends of the drum skin.

[0008] The connecting plate is fixedly provided with a sleeve, the transmission shaft is arranged in the interior of the sleeve and is fixedly connected with the sleeve, and the sleeve, the connecting plate and the cylinder skin are driven to rotate by rotation of the transmission shaft;

[0009] The rotating seats are respectively arranged at two ends of the exterior of the cylinder skin, and two ends of the transmission shaft are respectively rotatably connected to the rotating seats;

[0010] The first support plate is arranged on the connecting plate close to the input end of the transmission shaft, and the second support plate is arranged on the connecting plate at the other end of the cylinder skin away from the input end of the transmission shaft;

[0011] The bottom of the first support plate and the second support plate is arranged on the outer wall of the sleeve, and the side of the first support plate and the second support plate is arranged on the wall surface of the connecting plate, so that the connection strength between the connecting plate and the sleeve is improved by the first support plate and the second support plate;

[0012] The bottom of the second support plate is provided with a protective sleeve, the end of the protective sleeve is fixedly connected to the bottom of the second support plate, the protective sleeve is arranged around the transmission shaft, the protective sleeve is arranged along the axial direction of the transmission shaft, the protective sleeve limits the distance between the sleeve and the rotating seat, and the protective sleeve limits the ore material transported on the cylinder skin from falling into the assembly gap between the transmission shaft and the sleeve.

[0013] Further, a plurality of fasteners are arranged around the connecting plate in the circumferential direction.

[0014] Further, a bearing is arranged in the rotating seat.

[0015] Further, a plurality of the first support plates and the second support plates are connected to the outer wall of the sleeve in the circumferential direction.

[0016] Compared with the related art, the novel polyurethane drum for coal mines has the beneficial effects that: the buffer blocks are arranged on the top and bottom of the grating switch, when an unexpected collision occurs, the buffer blocks can first contact external force, buffer the impact force, reduce the direct impact force on the grating switch, and protect the internal precision elements from being damaged. Secondly, the vertical limiting columns are arranged on the buffer blocks, and the limiting plate fixed above the door plate and the movable supporting seat below the door plate are matched to form a stable limiting structure. The through holes on the limiting plate constrain the top limiting columns to prevent the grating switch from shaking above; the supporting seat can move along the height direction of the door plate, which can not only adapt to the fine position adjustment under different working conditions, but also can stabilize the grating switch at the bottom to avoid displacement and loosening of the grating switch due to vibration and collision, and comprehensively reduce the interference of external factors, so that the protection performance of the grating switch is effectively improved, and the stability and reliability of the electrical equipment safety protection device are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 FIG. 1 is a schematic view of the internal structure of the novel polyurethane drum for coal mines in the embodiment of the present application;

[0018] Fig. 2 FIG. 2 is a schematic view of the external structure of the novel polyurethane drum for coal mines in the embodiment of the present application. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] Please refer to Figs. 1-2 The present application provides a novel polyurethane drum for coal mines, which comprises a drum skin 11, a connecting ring 12, a connecting plate 13, a first supporting plate 21, a second supporting plate 22, a transmission shaft 14 and a rotating seat 15.

[0021] The drum skin 11 is in a cylindrical shape, a hollow cavity is formed in the inside of the drum skin 11, and the connecting rings 12 are arranged at both ends of the inside of the drum skin 11. The connecting plate 13 is fixedly connected with the connecting rings 12 through fasteners, and the fasteners are arranged on the connecting plate 13 in a circumferential direction. The hollow cavity is blocked by the connecting plates 13 at both ends of the drum skin 11.

[0022] A sleeve 16 is fixedly arranged on the connecting plate 13, the transmission shaft 14 is arranged in the inside of the sleeve 16 and is fixedly connected with the sleeve 16, and the sleeve 16, the connecting plate 13 and the drum skin 11 are driven to rotate by the rotation of the transmission shaft 14.

[0023] The rotating seats 15 are arranged at both ends of the outside of the drum skin 11, and the two ends of the transmission shaft 14 are rotatably connected with the rotating seats 15. Bearings are arranged in the rotating seats 15.

[0024] The first support plate 21 is arranged on the connecting plate 13 close to the input end of the transmission shaft 14, and the second support plate 22 is arranged on the connecting plate 13 at the other end of the cylinder skin 11 away from the input end of the transmission shaft 14.

[0025] The bottom of the first support plate 21 and the second support plate 22 is arranged on the outer wall of the sleeve 16, a plurality of first support plates 21 and second support plates 22 are circumferentially arranged on the outer wall of the sleeve 16, and the side of the first support plate 21 and the second support plate 22 is arranged on the wall surface of the connecting plate 13, so that the connection strength between the connecting plate 13 and the sleeve 16 is improved by the first support plate 21 and the second support plate 22.

[0026] The first support plate 21 is arranged on the connecting plate 13 close to the input end of the transmission shaft 14, so as to strengthen the connection of the key part and improve the stability of the overall structure. In coal mine operation, the drum is frequently stressed, and the stress condition of the input end is more complex.

[0027] The bottom of the first support plate 21 is connected to the outer wall of the sleeve 16, and the side is attached to the wall surface of the connecting plate 13, so as to build a stable support structure, disperse the stress from the transmission shaft 14 and the stress generated by the material impact, and prevent the connecting plate 13 and the sleeve 16 from being loose. A plurality of first support plates 21 are circumferentially arranged on the outer wall of the sleeve 16, so as to further balance the stress and avoid local stress concentration, so as to ensure stable power transmission when the drum is running at high speed to transport ore, reduce the failure caused by unstable structure, and prolong the service life.

[0028] The second support plate 22 cooperates with the first support plate 21 to form a more balanced and comprehensive support system for the sleeve 16, and supplements the support force of the far end of the drum to cope with the complex stress condition that may occur in long-distance transmission.

[0029] The bottom and side of the second support plate 22 are connected to the outer wall of the sleeve 16 and the wall surface of the connecting plate 13 respectively, so as to greatly enhance the connection stability between the far end connecting plate 13 and the sleeve 16, disperse the impact force and uneven load generated during material transportation, and reduce the risk of structural damage. The protective sleeve 23 at the bottom limits the distance between the sleeve 16 and the rotating seat 15, maintains the running accuracy, and also blocks the ore from falling into the gap between the transmission shaft 14 and the sleeve 16, reduces the wear of the parts, ensures the long-term stable operation of the drum, and adapts to the harsh working conditions of the coal mine.

[0030] The second support plate 22 is arranged away from the input end of the transmission shaft 14 for optimizing the stress distribution. In coal transportation, the drum continuously bears the weight of the ore and the running impact, and the side close to the input end is first stressed, and the force is transmitted along the transmission shaft 14. The second support plate 22 is arranged at the distal end to form a more reasonable mechanical support structure with the first support plate 21 close to the input end, balance the torque and bending moment caused by material conveying, avoid stress concentration in one place, and ensure the stability of the structure. In addition, this layout leaves space for the protective sleeve 23 to adapt, which is beneficial to the accurate assembly of the protective sleeve 23 and blocks the material from falling into the key assembly gap.

[0031] The bottom of the second support plate 22 is provided with a protective sleeve 23, the end of the protective sleeve 23 is fixedly connected to the bottom of the second support plate 22, the protective sleeve 23 is arranged around the transmission shaft 14, the protective sleeve 23 is arranged along the axis direction of the transmission shaft 14, the protective sleeve 23 limits the distance between the sleeve 16 and the rotating seat 15, and the protective sleeve 23 limits the ore material transported on the cylinder skin 11 from falling into the assembly gap between the transmission shaft 14 and the sleeve 16.

[0032] The protective sleeve 23 is arranged around the transmission shaft 14 to block the ore material falling from the cylinder skin 11 from entering the assembly gap between the transmission shaft 14 and the sleeve 16, prevent foreign matter from entering, and cause parts to jam, wear and tear, etc. At the same time, it extends along the axis direction, can also limit the distance between the sleeve 16 and the rotating seat 15, maintain the relative position stability between the parts, and ensure the stable rotation of the drum.

[0033] From the running stability, foreign matter interference is avoided, the transmission shaft 14 and the sleeve 16 always maintain smooth cooperation, the failure rate is reduced, and the service life of the parts is prolonged.

[0034] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A new polyurethane drum for coal mines, characterized by, It includes a cylinder skin, a connecting ring, a connecting plate, a first support plate, a second support plate, a transmission shaft and a rotating seat. The cylinder skin is in a cylindrical shape, a hollow cavity is formed in the inside of the cylinder skin, the connecting ring is arranged at both ends of the inside of the cylinder skin respectively, the connecting plate is fixedly connected with the connecting ring through fasteners, and the connecting plate at both ends of the cylinder skin blocks the hollow cavity. A sleeve is fixedly arranged on the connecting plate, the transmission shaft is arranged in the inside of the sleeve and is fixedly connected with the sleeve, and the sleeve, the connecting plate and the cylinder skin are driven to rotate by the rotation of the transmission shaft. The rotating seat is arranged at both ends of the outside of the cylinder skin respectively, and both ends of the transmission shaft are rotatably connected with the rotating seat. The first support plate is arranged on the connecting plate close to the input end of the transmission shaft, and the second support plate is arranged on the connecting plate at the other end of the cylinder skin away from the input end of the transmission shaft. The bottom of the first support plate and the second support plate is arranged on the outer wall of the sleeve, and the side of the first support plate and the second support plate is arranged on the wall of the connecting plate, so that the connection strength between the connecting plate and the sleeve is improved by the first support plate and the second support plate. The bottom of the second support plate is provided with a protective sleeve, the end of the protective sleeve is fixedly connected with the bottom of the second support plate, the protective sleeve is arranged around the transmission shaft, the protective sleeve is arranged along the axial direction of the transmission shaft, the protective sleeve limits the distance between the sleeve and the rotating seat, and the protective sleeve limits the ore material transported on the cylinder skin from falling into the assembly gap between the transmission shaft and the sleeve.

2. The new polyurethane drum for coal mines as claimed in claim 1 wherein, A plurality of fasteners are arranged around the connecting plate in the circumferential direction.

3. The new polyurethane drum for coal mines as claimed in claim 2, wherein, A bearing is arranged in the rotating seat.

4. The new polyurethane drum for coal mines as claimed in claim 3 wherein, A plurality of first support plates and second support plates are connected to the outer wall of the sleeve in the circumferential direction.

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