A feeding device for experimental mixer

Abstract

The present invention discloses a feeding device for an experimental mixer, comprising a loading mechanism, which is slidably arranged on a frame, and a driving mechanism is fixedly arranged on the frame, and the driving mechanism is used to drive the loading mechanism to vertically rise and fall on the frame; the loading mechanism comprises a hopper, which is rotatably arranged on a hopper frame, and the hopper frame is slidably arranged on the frame; a hopper limiting mechanism is horizontally arranged on the frame, and the outlet end of the hopper can rotate between two hopper limiting mechanisms; the outlet end of the hopper is connected to the feed port of the mixer; the present invention drives the hopper frame to move vertically upward under the drive of the driving mechanism, thereby realizing the vertical up and down movement of the stirred material; the hopper and the hopper frame are rotatably arranged, and when the hopper rises to a set height, under the action of the hopper limiting mechanism, the hopper is tilted and rotated to one side, and the material rolls out of the hopper and enters the mixer; there is no need to use manpower to carry the material, which saves time and effort, has a high feeding efficiency, occupies a small space, and is easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental equipment, and in particular relates to a feeding device for an experimental mixer. Background Art

[0002] In existing indoor concrete mixing equipment, the loading port is mostly set at a height of more than 1.4m from the ground. In indoor mixing equipment with a capacity of more than 40L, the materials required for a single mixing (for example, cement, gravel, sand, fly ash, etc.) are all more than 50Kg. At present, when conducting indoor experiments, most of the materials are loaded manually, which is time-consuming and labor-intensive, and the loading efficiency is low. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a feeding device for an experimental mixer to solve the technical problems in the prior art that the feeding process is time-consuming and labor-intensive and the feeding efficiency is low.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention provides a feeding device for an experimental mixer, comprising a frame, a loading mechanism, a driving mechanism and a hopper limiting mechanism; the loading mechanism is slidably arranged on the frame, the driving mechanism is fixedly arranged on the frame, and the driving mechanism is used to drive the loading mechanism to vertically rise and fall on the frame;

[0006] The loading mechanism includes a hopper, a hopper frame and a gas spring. The hopper is rotatably arranged on the hopper frame, and the hopper frame is slidably arranged on the frame. The hopper limiting mechanism is horizontally arranged on the frame, and the axial direction of the hopper limiting mechanism is parallel to the rotating axis of the hopper.

[0007] The hopper limiting mechanism includes a first hopper limiting mechanism and a second hopper limiting mechanism, the first hopper limiting mechanism is arranged above the second hopper limiting mechanism, and the outlet end of the hopper can rotate between the first hopper limiting mechanism and the second hopper limiting mechanism; the outlet end of the hopper is connected to the feed port of the mixer; the gas spring is arranged between the hopper and the hopper frame, one end of the gas spring is rotatably connected to the bottom of the hopper bottom plate, and the other end is rotatably connected to the hopper frame.

[0008] Furthermore, the hopper includes two hopper side plates, a hopper bottom plate and a hopper extension plate. The two hopper side plates are arranged vertically and in parallel. The hopper bottom plate is arranged between the two hopper side plates. The hopper bottom plate is an arc-shaped structural plate. The hopper extension plate is arranged on one side of the hopper bottom plate. One end of the hopper extension plate is tangentially and fixedly connected to the hopper bottom plate, and the other end is a free end. The free end of the hopper extension plate can be connected to the hopper limiting mechanism. The hopper side plate is rotatably connected to the hopper frame.

[0009] Furthermore, it also includes a material receiving mechanism; the material receiving mechanism is obliquely arranged on one side of the frame, one end of the material receiving mechanism is connected to the outlet end of the hopper, and the other end is connected to the feed port of the mixer; the material receiving mechanism adopts a material guide trough, the material guide trough is obliquely arranged between the outlet end of the hopper and the feed port of the mixer, one end of the material guide trough is connected to the second hopper limiting mechanism, and the other end is connected to the feed port of the mixer.

[0010] Furthermore, it also includes a first travel switch and a second travel switch. The first travel switch is arranged at the upper end of the frame and is located at the highest travel point of the loading mechanism; the second travel switch is arranged at the lower end of the frame, and the first travel switch and the second travel switch are both connected to the driving mechanism.

[0011] Furthermore, the frame includes a chassis, a bracket, a crossbeam and two longitudinal beams, the chassis is horizontally arranged, and the bracket is vertically fixedly arranged above the chassis;

[0012] The bracket includes a first bracket, a second bracket, a third bracket and a fourth bracket which are arranged vertically and in parallel, and the first bracket, the second bracket, the third bracket and the fourth bracket are distributed in a rectangular shape; a cross beam is horizontally arranged at the upper end of the first bracket and the fourth bracket, one longitudinal beam is horizontally arranged between the first bracket and the second bracket, and the other longitudinal beam is horizontally arranged between the third bracket and the fourth bracket; a hopper limiting mechanism is horizontally arranged at the upper end of the second bracket and the third bracket; a roller groove is arranged on the side wall of the bracket, and the axis of the roller groove is parallel to the axis of the bracket; a roller is arranged at the end of the hopper frame, and the roller is slidably arranged in the roller groove.

[0013] Furthermore, four supporting platforms are provided on the frame, the lower ends of which are fixedly arranged above the chassis, and the four supporting platforms are respectively arranged near the lower ends of the first bracket, the second bracket, the third bracket and the fourth bracket, and are located directly below the hopper rack; a rubber pad is provided at the upper end of the supporting platform.

[0014] Further, the driving mechanism includes a motor, a belt, a large pulley, a first transmission shaft, a second transmission shaft, a first gear, a second gear, two first cable drums, two second cable drums, a first steel cable, a second steel cable and a guide wheel;

[0015] The motor is fixedly arranged at the lower end of the frame, and the output shaft of the motor is connected to the large pulley through a belt, and the large pulley is fixedly sleeved on the first transmission shaft; the first transmission shaft and the second transmission shaft are arranged horizontally and parallel, the first gear is fixedly sleeved on the first transmission shaft, the second gear is fixedly sleeved on the second transmission shaft, and the first gear is meshingly connected with the second gear; the two first cable drums are symmetrically arranged at both ends of the first transmission shaft, and the two second cable drums are symmetrically arranged at both ends of the second transmission shaft; the two first cable drums are respectively provided with a first steel cable, one end of the first steel cable is wound around the first cable drum, and the other end of the first steel cable is connected to the middle bottom of the bucket frame; the two second cable drums are respectively provided with a second steel cable, one end of the second steel cable is wound around the second cable drum, and the other end of the second steel cable is connected to the middle top of the bucket frame after passing around the guide wheel; the guide wheel is fixedly arranged in the middle of the upper end of the frame.

[0016] Furthermore, the first hopper limiting mechanism and the second hopper limiting mechanism have the same structure. The first hopper limiting mechanism or the second hopper limiting mechanism includes a cylindrical roller shaft, a cylindrical roller and an A-frame; the cylindrical roller shaft is horizontally arranged at the upper end of the frame, and the two ends of the cylindrical roller shaft are respectively fixed to the frame through the A-frame; the cylindrical roller movable sleeve is arranged on the first cylindrical roller shaft.

[0017] Furthermore, it also includes a walking mechanism, which is arranged at the bottom of the frame; the walking mechanism includes two fixed pulleys and two free pulleys, the two fixed pulleys are arranged at one end of the frame, and the two free pulleys are arranged at the other end of the frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses an experimental mixer feeding device, which realizes vertical up and down movement of the mixing material by sliding a hopper frame on a frame, and the hopper frame moves vertically upward under the drive of a driving mechanism, and a hopper filled with mixing material is set on the hopper frame; the hopper and the hopper frame are rotatably arranged, and when the hopper rises to a set height, the hopper is tilted and rotated to one side under the action of a first hopper limiting mechanism; under the action of a second hopper limiting mechanism, the hopper is kept tilted, so that the mixing material rolls from the hopper into the mixer; the present invention does not require manpower to carry the mixing material vertically, saves time and effort, and has a high feeding efficiency; the hopper is vertically raised and lowered under the action of the hopper frame, has a simple structure, occupies a small space, and is easy to operate.

[0020] Furthermore, by using a hopper to transport mixed materials, the flying of dust when transporting cement or fly ash is reduced, the cleanliness of the work site is ensured, and the risk of occupational diseases for operators is reduced; the bottom of the hopper is set to an arc-shaped structure, which ensures that the mixed materials can be completely poured out, thereby improving the loading efficiency.

[0021] Furthermore, by arranging a gas spring between the hopper and the hopper frame, during the rotation of the hopper, the gas spring extends and contracts, thereby supporting and resetting the hopper. At the same time, due to the elastic effect of the gas spring, the collision energy between the hopper and the hopper limit mechanism is eliminated, thereby improving the stability of the hopper.

[0022] Furthermore, by arranging the material receiving mechanism at an angle, it is possible to feed materials to mixers at different heights, thereby increasing the use range of the feeding device.

[0023] Furthermore, by setting a roller groove on the frame, setting a roller at the end of the hopper frame, and sliding the roller in the roller groove, the friction between the hopper frame and the frame is reduced, the loading mechanism runs smoothly, and the loading mechanism is prevented from getting stuck during the lifting process.

[0024] Furthermore, by arranging a support platform with a rubber pad on the chassis, the stable landing of the loading mechanism is ensured, and the rigid collision between the loading mechanism and the frame is avoided.

[0025] Furthermore, the driving mechanism adopts a motor and a steel cable, and the vertical lifting and lowering drive of the loading mechanism is realized through the forward and reverse rotation of the motor. There is no need to use the assistance of hydraulic, pneumatic and electrical components to realize the lifting and dumping of the hopper. It has a simple structure, easy operation and low cost.

[0026] Furthermore, the hopper limiting mechanism adopts a cylindrical roller to convert the friction between the hopper and the hopper limiting mechanism into rolling friction, thereby reducing the friction resistance, avoiding the stagnation of the hopper and the hopper limiting mechanism, and making it easier for the hopper to flip and dump the mixed materials.

[0027] Furthermore, by arranging a walking mechanism at the bottom of the frame, the transportation of the feeding structure is facilitated, and by arranging two kinds of movable wheels, the movement and fixation of the feeding device are realized, which is convenient to use and has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axonometric view of an experimental mixer feeding device according to the present invention;

[0029] Figure 2 It is a front view of a feeding device for an experimental mixer according to the present invention;

[0030] Figure 3 It is a right side view of a feeding device for an experimental mixer according to the present invention;

[0031] Figure 4 It is a front view of a loading mechanism in a feeding device of an experimental mixer according to the present invention;

[0032] Figure 5It is an axonometric diagram of a loading mechanism in a feeding device of an experimental mixer according to the present invention;

[0033] Figure 6 This is an exploded view of a loading mechanism in a feeding device for an experimental mixer described in the present invention.

[0034] Among them, 1 frame, 2 loading mechanism, 3 driving mechanism, 4 hopper limit mechanism, 5 receiving mechanism, 6 walking mechanism, 7 first stroke switch, 8 second stroke switch; 11 chassis, 12 bracket, 13 crossbeam, 14 longitudinal beam, 15 support, 16 rubber pad, 17 cover plate; 121 first bracket, 122 second bracket, 123 third bracket, 124 fourth bracket; 21 hopper, 22 hopper frame, 23 gas spring, 24 roller; 211 hopper side plate, 212 hopper frame, 2 Bucket bottom plate, 213 bucket extension plate; 31 motor, 32 belt, 33 large pulley, 34 first transmission shaft, 35 second transmission shaft, 36 first gear, 37 second gear, 38 first cable drum, 39 second cable drum, 310 first steel cable, 311 second steel cable, 312 guide wheel; 41 first bucket limiting mechanism, 42 second bucket limiting mechanism; 403 herringbone frame, 402 cylindrical roller, 401 cylindrical roller shaft; 61 fixable pulley, 62 pulley. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] As attached Figure 1-6 As shown, the present invention provides a feeding device for an experimental mixer, comprising a frame 1, a loading mechanism 2, a driving mechanism 3, a hopper limiting mechanism 4, a material receiving mechanism 5, a walking mechanism 6, a first travel switch 7 and a second travel switch 8;

[0037] The frame 1 is set on the ground and is located near the mixer; the loading mechanism 2 is slidably set on the frame 1, and the driving mechanism 3 is fixedly set at the lower end of the frame 1; the output end of the driving mechanism 3 is connected to the loading mechanism 2, and is used to drive the loading mechanism 2 to vertically rise and fall on the frame 1; the hopper limit mechanism 4 is horizontally set at a preset height position on one side of the frame 1, and is used to limit the loading mechanism 2 from moving upward or downward, so that the mixed material in the loading mechanism 2 is poured out; the material receiving mechanism 5 is set on one side of the loading mechanism 2, one end of the material receiving mechanism 5 is connected to the loading mechanism 2, and the other end is connected to the feed port of the mixer; the walking mechanism 6 is set at the bottom of the frame 1 to facilitate the movement of the feeding device; the first travel switch 7 and the second travel switch 8 are both set on the frame 1, and are respectively connected to the driving mechanism 3, and are used to control the opening and closing of the driving mechanism 3.

[0038] The frame 1 includes a chassis 11, a bracket 12, a crossbeam 13, two longitudinal beams 14, four bearing platforms 15, a rubber pad 16 and a cover plate 17; the chassis 11 is horizontally arranged, the bracket 12 is vertically fixedly arranged above the chassis 11, and the bracket 12 and the chassis 11 are fixed by welding; the bracket 12 includes a first bracket 121, a second bracket 122, a third bracket 123 and a fourth bracket 124 arranged vertically and parallel, and the first bracket 121, the second bracket 122, the third bracket 123 and the fourth bracket 124 are distributed in a rectangular shape; the crossbeam 13 is horizontally welded and arranged at the upper ends of the first bracket 121 and the fourth bracket 124, one of which is A longitudinal beam 14 is horizontally welded and arranged between the first bracket 121 and the second bracket 122, and another longitudinal beam 14 is horizontally welded and arranged between the third bracket 123 and the fourth bracket 124; the hopper limiting mechanism 4 is horizontally arranged at the upper ends of the second bracket 122 and the third bracket 123; a roller groove is arranged on the side wall of the bracket 12, and the axis of the roller groove is parallel to the axis of the bracket 12; a roller 24 is arranged at the end of the hopper frame 22, and the roller 24 is slidably arranged in the roller groove, and the cover plate 17 is buckled and arranged in the roller groove, ensuring the stable operation of the roller 24 in the roller groove, and the cover plate 17 and the bracket 12 are fixedly connected by bolts.

[0039] The four supporting platforms 15 are respectively arranged near the lower ends of the first bracket 121, the second bracket 122, the third bracket 123 and the fourth bracket 124, and are located directly below the hopper frame 22; the lower end of the supporting platform 15 is welded and fixed above the chassis 11, and the supporting platform 15 and the chassis 11 are fixed by welding. A rubber pad 16 is provided at the upper end of the supporting platform 15. The height of the supporting platform 15 is greater than the height of the driving mechanism 3, thereby avoiding contact between the hopper frame 22 and the driving mechanism 3 during the descent process, thereby ensuring the structural integrity and good operation of the driving mechanism 3; by providing the rubber pad 16, a soft contact is formed between the hopper frame 22 and the supporting platform 15, thereby avoiding rigid collision between the two.

[0040] The loading mechanism 2 includes a hopper 21, a hopper frame 22 and a gas spring 23. The hopper 21 is rotatably arranged on the hopper frame 22, and the hopper frame 22 is slidably arranged on the frame 1. The outlet end of the hopper 21 is connected to the feed port of the mixer.

[0041] The hopper 21 includes two hopper side plates 211, a hopper bottom plate 212 and a hopper extension plate 213. The two hopper side plates 211 are arranged vertically and in parallel. The hopper bottom plate 212 is arranged between the two hopper side plates 211. The hopper bottom plate 212 is an arc-shaped structural plate. The hopper extension plate 213 is arranged on one side of the hopper bottom plate 212. One end of the hopper extension plate 213 is tangentially and fixedly connected to the hopper bottom plate 212, and the other end is a free end. The free end of the hopper extension plate 213 can be connected to the hopper limiting mechanism 4. The hopper side plate 211 is rotatably connected to the hopper frame 22.

[0042] The outer sides of the hopper side plates 211 are respectively provided with extending shafts, which are installed on the lower bearing seats of the hopper frame 22 in cooperation with the bearing bushes, and the upper bearing seats are covered on top of the bearing bushes. The upper bearing seats and the lower bearing seats are fastened with screws to ensure that the hopper 21 is tilted and flipped through the extending shafts; the gas spring 23 is arranged between the hopper 21 and the hopper frame 22, one end of the gas spring 23 is rotatably connected to the bottom of the hopper bottom plate 212, and the other end is rotatably connected to the hopper frame 22; the extending end of the gas spring 23 is mounted on the pin shaft hole at the bottom of the hopper 21 through a pin shaft and a cotter pin, and the base end of the gas spring 23 is mounted on the pin shaft hole on the hopper frame through a pin shaft and a cotter pin.

[0043] The driving mechanism 3 includes a motor 31, a belt 32, a large pulley 33, a first transmission shaft 34, a second transmission shaft 35, a first gear 36, a second gear 37, two first cable drums 38, two second cable drums 39, a first steel cable 310, a second steel cable 311 and a guide wheel 312;

[0044] The motor 31 is fixedly arranged at the lower end of the frame 1, and the output shaft of the motor 31 is connected to the large pulley 33 through a belt 32, and the large pulley 33 is fixedly sleeved on the first transmission shaft 34; the first transmission shaft 34 and the second transmission shaft 35 are arranged horizontally and parallel, the first gear 36 is fixedly sleeved on the first transmission shaft 34, and the second gear 37 is fixedly sleeved on the second transmission shaft 35, and the first gear 36 is meshed and connected with the second gear 37; two first cable drums 38 are symmetrically arranged at both ends of the first transmission shaft 34, and two second cable drums 39 are symmetrically arranged at the first transmission shaft 34. Two ends of the second transmission shaft 35; the two first cable drums 38 are respectively provided with a first steel cable 310, one end of the first steel cable 310 is wound around the first cable drum 38, and the other end of the first steel cable 310 is connected to the middle bottom of the hopper frame 22; the two second cable drums 39 are respectively provided with a second steel cable 311, one end of the second steel cable 311 is wound around the second cable drum 39, and the other end of the second steel cable 311 is connected to the middle top of the hopper frame 22 after passing through the guide wheel 312; the guide wheel 312 is fixedly arranged in the middle of the upper end of the frame 1.

[0045] The motor 31 adopts a servo motor, the belt 32 adopts a V-belt, and the guide wheel 312 adopts a fixed pulley, which is fixedly arranged on the longitudinal beam 14; during the transmission process, the servo motor transmits power to the large pulley through the V-belt, and the large pulley drives the first transmission shaft to rotate, and under the meshing condition of the first gear and the second gear, the power of the first transmission shaft is transmitted to the second transmission shaft; a cable drum is respectively installed at both ends of the first transmission shaft and the second transmission shaft, one end of the first steel cable is wound around the first cable drum clockwise, and the other end is tied to the bottom of the bucket frame; one end of the second steel cable is wound around the second cable drum clockwise, and the other end passes through the fixed pulley group and is tied to the upper part of the bucket frame; therefore, power is transmitted to the loading mechanism through the cable drum and the steel cable, thereby realizing the up and down movement of the loading mechanism.

[0046] The hopper limiting mechanism 4 includes a first hopper limiting mechanism 41 and a second hopper limiting mechanism 42. The first hopper limiting mechanism 41 is arranged above the second hopper limiting mechanism 42, and the outlet end of the hopper 21 can rotate between the first hopper limiting mechanism 41 and the second hopper limiting mechanism 42; the hopper limiting mechanism 4 includes a cylindrical roller shaft 401, a cylindrical roller 402 and an A-frame 403; the cylindrical roller shaft 401 is horizontally arranged at the upper end of the frame 1, and the two ends of the cylindrical roller shaft 401 are respectively fixed to the frame 1 through the A-frame 403; the cylindrical roller 402 is movably sleeved on the cylindrical roller shaft 401.

[0047] The material receiving mechanism 5 is tiltedly arranged on one side of the frame 1, one end of the material receiving mechanism 5 is connected to the outlet end of the hopper 21, and the other end is connected to the feed port of the mixer; the tilt angle of the material receiving mechanism 5 is adjustable; the material receiving mechanism 5 adopts a material guide trough, which is tiltedly arranged between the outlet end of the hopper 21 and the feed port of the mixer, and one end of the material guide trough is connected to the second hopper limiting mechanism 42.

[0048] The walking mechanism 6 is arranged at the bottom of the frame 1; the walking mechanism 6 includes two fixed pulleys 61 and two free pulleys 62, the two fixed pulleys 61 are arranged at one end of the frame 1, and the two free pulleys 62 are arranged at the other end of the frame 1.

[0049] The first stroke switch 7 is arranged at the lower middle end of the crossbeam 13 and is located at the highest stroke point of the loading mechanism 2, and the first stroke switch 7 is connected to the motor; the second stroke switch 8 is arranged in the rubber pad 16, and the second stroke switch 8 is connected to the driving mechanism 3; when the loading rack rises to the highest point, the upper end of the loading rack touches the first stroke switch, and the first stroke switch sends a signal to make the motor stop due to shaft holding and the loading mechanism suspend; when the loading mechanism falls to the lowest position, the bottom of the loading rack contacts the rubber pad and touches the second stroke switch, so that the servo motor is powered off and stops due to shaft holding.

[0050] Working principle and usage

[0051] In the feeding device of the experimental mixer according to the present invention, the loading mechanism realizes the vertical upward and downward movements along the frame driven by the driving mechanism. When the motor is started to rotate forward, it drives the hopper and the hopper frame to move vertically upward. During the vertical upward movement of the hopper and the hopper frame, when the hopper rises to a preset position, the hopper extension plate of the hopper touches the cylindrical roller of the first hopper limiting mechanism fixedly arranged on the bracket. At this time, the hopper frame continues to rise, and the cylindrical roller of the first hopper limiting mechanism will force the hopper to flip on the hopper frame. The gas spring arranged between the hopper and the hopper frame will first contract and then expand. When the gas spring expands, it promotes the hopper to flip. When the hopper frame continues to rise, it touches the first travel switch arranged at the upper end of the frame. The first travel switch sends a signal to make the motor hold the shaft and stop, and the loading mechanism hovers. The outlet end of the hopper touches the second hopper limiting mechanism, and the stirring material loaded in the hopper will be poured out of the hopper. The stirring material enters the mixer through the material receiving mechanism arranged on the bracket for stirring.

[0052] When the hopper is in the flipped state, the projection of the hopper on the horizontal plane will become longer, so that the hopper extension plate can contact the cylindrical roller of the first hopper limiting mechanism. After the stirring material is poured out, the motor rotates in reverse to drive the hopper and the hopper frame to move downward. During the vertical downward movement of the hopper and the hopper frame, the cylindrical roller of the second hopper limiting mechanism acts on the hopper extension plate, and under the action of the gas spring, it forces the hopper to reset. During this process, the gas spring first shortens and then expands. When the gas spring expands, it promotes the reset of the hopper, and when the hopper is reset, the gas spring makes the hopper more stable. When the hopper frame just lands above the bearing platform, it touches the second travel switch in the rubber pad, and the motor is turned off to complete the feeding.

[0053] The rotation and flipping principle of the hopper:

[0054] Taking the rotation center of the hopper as the origin o, with the horizontal rightward as the positive direction of the x-axis and the vertical upward as the positive direction of the y-axis, a coordinate system xoy is established. The vertex of the hopper extension plate 213 is A. The distance between the projection of the vertex of the hopper extension plate on the x-axis and the origin is denoted as a, the angle between oA and the positive direction of the y-axis is β, and the vertex of the hopper extension plate rotates in the first quadrant and the second and fourth quadrant regions. The distance from the projection of the cylindrical roller of the first hopper limiting mechanism on the x-axis to the origin o is denoted as b. The distance from the projection of the cylindrical roller of the second hopper limiting mechanism on the x-axis to the origin o is denoted as c. In the initial state of the hopper, the condition should be satisfied: b < a < c, so that the cylindrical roller of the first hopper limiting mechanism can contact the hopper extension plate when the loading mechanism rises and make the hopper flip clockwise, and the cylindrical roller of the second hopper limiting mechanism will not contact the hopper. Denote the angle between oA and the y-axis in the initial state of the hopper as β0, then the maximum rotation angle βmax of oA; that is, when the hopper is tilted at the maximum angle, the condition should be satisfied: 90° < β max <180° - β0. If β max> 180° - β0, it is possible that when the loading mechanism has not reached the highest designated position, the hopper extension plate loses the blocking effect of the cylindrical roller of the first hopper limiting mechanism, that is, a < b, and the hopper starts to reset before it is fully tilted. When the hopper is tilted at the maximum angle, the condition should be satisfied: a > c, that is, the hopper extension plate can be tilted and placed on the cylindrical roller of the second hopper limiting mechanism; in the present invention, 90° < α ≤ 180°, 0° < γ < 90°; when the hopper extension plate moves between the cylindrical rollers of the first hopper limiting mechanism and the second hopper limiting mechanism, the height difference between the cylindrical rollers of the first hopper limiting mechanism and the second hopper limiting mechanism should enable the loading mechanism to reach the designated highest point.

[0055] For the feeding device of an experimental mixer described in the present invention, when feeding during a concrete mixing experiment, first place the feeding device in a suitable site; hang one end of the material guiding groove on the cylindrical roller of the second hopper limiting mechanism, and place the other end on the feeding port of the mixer; load the mixing material into the hopper, start the motor, and drive the hopper and the hopper frame loaded with the mixing material to rise vertically under the action of the first steel cable and the second steel cable. When the hopper reaches the set position, the hopper extension plate touches the cylindrical roller of the first hopper limiting mechanism. At this time, the hopper frame continues to rise, and the hopper tilts and flips under the action of the cylindrical roller of the first hopper limiting mechanism; when the loading mechanism rises to the highest point, it touches the first travel switch and sends a signal to make the motor hold the shaft and stop, and the loading mechanism hovers. At this time, the hopper is tilted to the maximum and is placed on the cylindrical roller of the second hopper limiting mechanism, and the mixing material slowly slides from the hopper into the material guiding groove and then enters the mixer; when the mixing material in the hopper is emptied, start the servo motor in reverse, the loading mechanism drops, and the cylindrical roller of the second hopper limiting mechanism gives an upward acting force to the hopper extension plate to make the hopper rotate in the reverse direction, and the air spring will prompt the hopper to return to the initial state; when the loading mechanism drops to the lowest position, it touches the second travel switch to cut off the power supply of the servo motor and hold the shaft and stop, completing the material transportation.

[0056] The experimental mixer feeding device described in the present invention can realize the dumping and resetting actions of the hopper through the assistance of simple air pressure and electrical components; the hopper and the hopper frame are vertically lifted and lowered for feeding, which occupies less space and saves experimental space compared to the conveyor belt feeding equipment in existing projects that makes the feeding parts tilted; the present invention adopts the hopper for loading, and when cement and fly ash are carried, less dust is raised, making the work site cleaner and reducing the risk of occupational diseases for operators. When the hopper frame rises and falls, the rollers at the ends of the hopper frame roll in the predetermined roller groove area, making the hopper and the hopper frame operate more smoothly; due to the rolling action of the rollers, the jamming of the loading assembly during the lifting process is avoided; by installing two kinds of movable wheels under the chassis, the equipment can be moved and fixed, which is convenient to use; when using the present invention, only the forward button or reverse button of the motor needs to be pressed to realize the lifting, dumping, hopper resetting and loading assembly lowering of the material; in the present invention, two travel switches are set, and when the loading assembly reaches the specified position, the travel switch is touched, the power is turned off, the motor is locked, the loading mechanism is fixed, and no manual control is required in the intermediate process, which is convenient to operate, saving time and effort. The present invention uses a cylindrical roller to contact the hopper extension plate to form rolling friction, which reduces friction resistance and makes it easier to turn over the hopper; the present invention is equipped with a material guide trough, which can feed mixers of different heights, making the application range of the present invention wider; the hopper in the present invention has a novel shape and a large capacity, and the arc at the bottom of the hopper is tangent to the bottom of the extended part of the trough, making the dumping of materials cleaner; the rubber pad in the present invention makes the landing of the hopper assembly more stable and avoids rigid collision between metals; when the hopper in the present invention is loaded and rises, although the hopper extension plate touches the cylindrical roller, due to the elastic effect of the gas spring, part of the collision energy is eliminated, making the operation of the entire equipment more stable.

[0057] The above description only represents the preferred embodiments of the present invention. Any structural deformation, improvement and modification made by anyone without departing from the principle of the present invention shall be deemed to be within the protection scope of the present invention.

Claims

1. An experimental mixer feeding device, characterized in that: The machine comprises a frame (1), a loading mechanism (2), a driving mechanism (3) and a hopper limiting mechanism (4); the loading mechanism (2) is slidably arranged on the frame (1), the driving mechanism (3) is fixedly arranged on the frame (1), and the driving mechanism (3) is used to drive the loading mechanism (2) to vertically rise and fall on the frame (1); The loading mechanism (2) comprises a hopper (21), a hopper frame (22) and a gas spring (23); the hopper (21) is rotatably arranged on the hopper frame (22), and the hopper frame (22) is slidably arranged on the frame (1); the hopper limiting mechanism (4) is horizontally arranged on the frame (1), and the axial direction of the hopper limiting mechanism (4) is parallel to the rotation axis of the hopper (21); The hopper limiting mechanism (4) comprises a first hopper limiting mechanism (41) and a second hopper limiting mechanism (42); the first hopper limiting mechanism (41) is arranged above the second hopper limiting mechanism (42); the outlet end of the hopper (21) can rotate between the first hopper limiting mechanism (41) and the second hopper limiting mechanism (42); the outlet end of the hopper (21) is connected to the feed port of the mixer; the gas spring (23) is arranged between the hopper (21) and the hopper frame (22); one end of the gas spring (23) is rotatably connected to the bottom of the hopper bottom plate (212), and the other end is rotatably connected to the hopper frame (22); The hopper (21) comprises two hopper side plates (211), a hopper bottom plate (212) and a hopper extension plate (213); the two hopper side plates (211) are arranged vertically and in parallel; the hopper bottom plate (212) is arranged between the two hopper side plates (211); the hopper bottom plate (212) is an arc-shaped structural plate; the hopper extension plate (213) is arranged on one side of the hopper bottom plate (212); one end of the hopper extension plate (213) is tangentially fixedly connected to the hopper bottom plate (212); the other end is a free end; the free end of the hopper extension plate (213) can be connected to the hopper limiting mechanism (4); the hopper side plates (211) are rotatably connected to the hopper frame (22); It also comprises a first travel switch (7) and a second travel switch (8), wherein the first travel switch (7) is arranged at the upper end of the frame (1) and is located at the highest travel point of the loading mechanism (2); the second travel switch (8) is arranged at the lower end of the frame (1), and both the first travel switch (7) and the second travel switch (8) are connected to the driving mechanism (3).

2. The experimental mixer feeding device according to claim 1, characterized in that: The machine also comprises a material receiving mechanism (5); the material receiving mechanism (5) is arranged obliquely on one side of the frame (1); one end of the material receiving mechanism (5) is connected to the outlet end of the hopper (21), and the other end is connected to the feed inlet of the mixer; the material receiving mechanism (5) adopts a material guide trough, which is arranged obliquely between the outlet end of the hopper (21) and the feed inlet of the mixer; one end of the material guide trough is connected to the second hopper limiting mechanism (42), and the other end is connected to the feed inlet of the mixer.

3. The experimental mixer feeding device according to claim 1, characterized in that: The frame (1) comprises a chassis (11), a bracket (12), a crossbeam (13) and two longitudinal beams (14); the chassis (11) is arranged horizontally, and the bracket (12) is vertically fixedly arranged above the chassis (11); The bracket (12) comprises a first bracket (121), a second bracket (122), a third bracket (123) and a fourth bracket (124) which are arranged vertically and in parallel, and the first bracket (121), the second bracket (122), the third bracket (123) and the fourth bracket (124) are arranged in a rectangular shape; the cross beam (13) is horizontally arranged at the upper ends of the first bracket (121) and the fourth bracket (124), one longitudinal beam (14) is horizontally arranged between the first bracket (121) and the second bracket (122), and the other longitudinal beam (14) is horizontally arranged between the third bracket (123) and the fourth bracket (124); the hopper limiting mechanism (4) is horizontally arranged at the upper ends of the second bracket (122) and the third bracket (123); a roller groove is arranged on the side wall of the bracket (12), and the axis of the roller groove is parallel to the axis of the bracket (12); a roller (24) is arranged at the end of the hopper frame (22), and the roller (24) is slidably arranged in the roller groove.

4. The experimental mixer feeding device according to claim 3, characterized in that: Four supporting platforms (15) are also arranged on the frame (1), the lower ends of the supporting platforms (15) are fixedly arranged above the chassis (11), and the four supporting platforms (15) are respectively arranged near the lower ends of the first bracket (121), the second bracket (122), the third bracket (123) and the fourth bracket (124), and are located directly below the hopper frame (22); and a rubber pad (16) is arranged at the upper end of the supporting platform (15).

5. The experimental mixer feeding device according to claim 1, characterized in that: The driving mechanism (3) comprises a motor (31), a belt (32), a large pulley (33), a first transmission shaft (34), a second transmission shaft (35), a first gear (36), a second gear (37), two first cable drums (38), two second cable drums (39), a first steel cable (310), a second steel cable (311) and a guide wheel (312); The motor (31) is fixedly arranged at the lower end of the frame (1); the output shaft of the motor (31) is connected to a large pulley (33) through a belt (32); the large pulley (33) is fixedly sleeved on a first transmission shaft (34); the first transmission shaft (34) and the second transmission shaft (35) are arranged horizontally and parallel; the first gear (36) is fixedly sleeved on the first transmission shaft (34); the second gear (37) is fixedly sleeved on the second transmission shaft (35); the first gear (36) and the second gear (37) are meshed and connected; two first cable drums (38) are symmetrically arranged at two ends of the first transmission shaft (34); and two second cable drums (39) are symmetrically arranged. At both ends of the second transmission shaft (35); first steel cables (310) are respectively arranged on the two first cable drums (38), one end of the first steel cable (310) is wound around the first cable drum (38), and the other end of the first steel cable (310) is connected to the middle bottom of the hopper frame (22); second steel cables (311) are respectively arranged on the two second cable drums (39), one end of the second steel cable (311) is wound around the second cable drum (39), and the other end of the second steel cable (311) is connected to the middle top of the hopper frame (22) after passing through a guide wheel (312); the guide wheel (312) is fixedly arranged at the middle of the upper end of the frame (1).

6. The experimental mixer feeding device according to claim 1, characterized in that: The first hopper limiting mechanism (41) and the second hopper limiting mechanism (42) have the same structure. The first hopper limiting mechanism (41) or the second hopper limiting mechanism (42) comprises a cylindrical roller shaft (401), a cylindrical roller (402) and an A-frame (403); the cylindrical roller shaft (401) is horizontally arranged at the upper end of the frame (1), and the two ends of the cylindrical roller shaft (401) are respectively fixed to the frame (1) through the A-frame (403); and the cylindrical roller (402) is movably sleeved on the first cylindrical roller shaft (401).

7. The experimental mixer feeding device according to claim 1, characterized in that: The machine also comprises a walking mechanism (6), which is arranged at the bottom of the frame (1); the walking mechanism (6) comprises two fixable pulleys (61) and two free pulleys (62), the two fixable pulleys (61) are arranged at one end of the frame (1), and the two free pulleys (62) are arranged at the other end of the frame (1).

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