Material conveying and feeding device and working method thereof

Abstract

The present application discloses a material conveying and feeding device and a working method thereof, which relates to the technical field of material conveying equipment, including a conveyor belt for conveying materials, with the conveying direction of the materials on the conveyor belt being from back to front, and the front end of the conveyor belt being provided with a fixed trough and a side-opening hopper in sequence, the fixed trough and the side-opening hopper being driven by the same driving cylinder, and acting in coordination, so that the side-opening hopper feeds the equipment of the next process while the materials on the upper conveyor belt are blocked by an arc-shaped baffle for temporary retention. The present application avoids the spilling of mineral materials caused by the continuous conveying of the conveyor belt while feeding, and thus realizes the accurate control of the feeding amount of the ball mill by the side-opening hopper each time; the linkage is driven by the same driving cylinder, which ensures the stability of the coordinated action of the fixed trough and the side-opening hopper, reduces the equipment cost, volume and power consumption, and simplifies the control.

Description

Technical Field

[0001] The present application relates to the technical field of material conveying equipment, and in particular to a material conveying and loading device and a working method thereof. Background Art

[0002] In the metal smelting industry, when flotation is used for the beneficiation and purification of non-ferrous metals, the quality of the ball milling process will directly affect the flotation efficiency and quality of the metal ore powder in the subsequent process. At present, in most non-ferrous metal smelting enterprises, it is inconvenient to adjust the speed of large ball mills due to their large rotational inertia. At this time, the process parameters that control the efficiency and quality of ball milling are mainly determined by the amount of feed in the ball mill. In addition, under the condition of the same feed amount, the size of the ore also has a certain impact on the ball milling efficiency.

[0003] At present, the entire feeding system of large ball mills mainly relies on the workers' on-site experience judgment (for example, judging the amount of material inside the ball mill based on the size of the ball mill noise), and then manually controlling the speed of the conveyor belt or the opening and closing of the silo discharge gate to adjust and control the feed amount in real time. This not only places high demands on the workers' experience, but also greatly increases the labor intensity and health damage due to the harsh working environment. In addition, production practice shows that the size of the ore also has a certain impact on the ball milling efficiency. Before the ore is put into the ball mill, the size distribution of the ore on the conveyor belt is large (about 10 mm~150 mm), and the size of the ore transported at different times is also irregular, which has an adverse effect on the ball milling efficiency and ball milling quality. At present, the relevant technology or design for controlling the size distribution of ore in the process of feeding the ball mill has not been accurately reported.

[0004] At present, there have been many reports on the design patents of feeding and conveying devices, but these feeding and conveying devices still have many problems in structural design, working efficiency, actual use and maintenance, such as:

[0005] Chinese patent CN 218967923 U discloses a material conveying device for a quantitative feeder, including a bracket, a mounting plate, a conveyor belt, a motorized roller, and a hopper on the conveyor belt. The conveying device only relies on the volume of the hopper to quantitatively process the material, and does not convert the material quantity into data. This quantitative method is greatly affected by external factors, such as the volume of the material, the stacking method of the material after entering the hopper, etc., so the quantitative result will also produce huge errors; on the other hand, since the hopper of the device is a spaced design, the time cost of the material entering the hopper will be greatly increased, and this design also has the risk of material loss during transportation. Therefore, the design described in this patent has great limitations and lacks innovation.

[0006] Chinese patent CN 207632142 U discloses a material quantitative conveying device, including a material storage tank, a conveying mechanism disposed below the material storage tank, a temporary storage room connected to the conveying mechanism, and a weighing storage bin disposed below the temporary storage room. Although the device is provided with a material weighing processing system, there is no feedback between the weighing result of the material and its conveying, and the subsequent feeding result cannot be monitored and fed back; on the other hand, the material conveying speed of the device is determined by the size of the discharge port, and the size of the discharge port can only be manually determined and adjusted according to the material type, and the conveying process is not fully automated. Therefore, the design described in this patent still has certain limitations.

[0007] Chinese patent CN 115057172 B discloses a spiral powder conveying device, in which a spiral conveyor conveys materials, and the materials are introduced into a storage tank through a feed pipe. A pressure sensor senses the pressure of the storage tank, and the pressure sensor controls the opening and closing member to close the feed pipe. Although the device is provided with a quantitative control system for materials, since the entire device is not provided with a monitoring feedback system and the device is a cylindrical structure, the structure and operation status inside the device cannot be observed from the outside, resulting in the inability to timely judge and handle the accident if an accident occurs in the internal device. On the other hand, the versatility of the device is relatively narrow, and it is only suitable for the quantitative transportation of powdered materials, and cannot widely solve the quantitative transportation problems faced by the industry. At the same time, the installation cost and difficulty of the device are high, and the economic benefits are low. Therefore, the design described in this patent has great limitations and lacks economic benefits.

[0008] Therefore, in response to the above problems, a new type of mineral crushing, conveying and quantitative feeding system is designed, which can not only effectively reduce the labor intensity and health damage of workers, but also effectively avoid the discontinuous control of feed amount caused by human errors, resulting in inconsistent ball milling efficiency and quality. At the same time, it can indirectly improve the service life of the ball mill, which has high engineering application value and broad market prospects. Summary of the invention

[0009] The embodiment of the present application provides a material conveying and feeding device and a working method thereof, which are used to at least solve the technical problem that the feeding amount of the existing feeding device is difficult to accurately control.

[0010] In order to achieve the above application purpose, the present application provides a material conveying and loading device, including a conveyor belt for conveying materials, with the conveying direction of the materials on the conveyor belt being from back to front, and a fixed material trough for receiving the materials conveyed by the conveyor belt being provided at the lower position of the front end of the conveyor belt,

[0011] The fixed material trough comprises a bottom plate inclined downward from the back to the front and a left baffle plate and a right baffle plate respectively arranged on both sides of the bottom plate and roughly perpendicular to the bottom plate, the front end edges of the left baffle plate and the right baffle plate are arc-shaped and symmetrical to each other, and the center of the front end arc-shaped edge is located on the corresponding baffle plate, and the front sides of the left baffle plate and the right baffle plate are provided with arc-shaped baffle plates for closing the front end opening of the fixed material trough, and the inner sides of the arc-shaped baffle plates are respectively fitted with the front edges of the bottom plate, the left baffle plate and the right baffle plate, and the left and right sides of the arc-shaped baffle plates are respectively rotatably installed on the baffle plates on the corresponding sides through the connecting plate and the first rotating shaft, and the two first rotating shafts The axis center and the center of the arc-shaped edges of the front ends of the two side baffles coincide with each other, the bottom of the arc-shaped baffle is connected to the driving block through the first connecting rod structure, the driving block is fixedly connected to the piston rod of the driving cylinder, when the piston rod of the driving cylinder is extended, the driving block drives the arc-shaped baffle to rotate upward around the common axis of the two first rotating shafts through the first connecting rod structure, and closes the front end opening of the fixed material trough; when the piston rod of the driving cylinder is retracted, the driving block drives the arc-shaped baffle to rotate downward around the common axis of the two first rotating shafts through the first connecting rod structure, the arc-shaped baffle rotates to the lower side of the bottom plate of the fixed material trough and opens the front end opening of the fixed material trough;

[0012] A side-opening hopper for receiving materials discharged from the fixed trough is provided at a lower position of the front end portion of the fixed trough, and the side-opening hopper includes a left hopper and a right hopper respectively arranged on the left and right sides, the left side of the left hopper is rotatably mounted on the left support shaft through a support ear, and the right side of the right hopper is rotatably mounted on the right support shaft through a support ear, the left support shaft and the right support shaft both extend in the front-to-back direction and are fixed by a support member, and the bottoms of the left hopper and the right hopper are respectively connected to the driving block through a second connecting rod structure, and when the piston rod of the driving cylinder is retracted, the driving block drives the left hopper to rotate inward around the left support shaft through the two second connecting rod structures, and at the same time, the right The hopper rotates inwardly around the right supporting axis, and the left hopper and the right hopper are assembled into a complete hopper. At this time, the fixed trough is in a state of open front end opening, and the material in the fixed trough freely falls into the hopper; when the piston rod of the driving cylinder is extended, the driving block drives the left hopper to rotate outwardly around the left supporting axis through two second connecting rod structures, and at the same time, the right hopper rotates outwardly around the right supporting axis. The gap between the left hopper and the right hopper forms a material drop opening, and the material in the material opening completes the feeding of the next process. At this time, the fixed trough is in a state of front end opening closed by an arc-shaped baffle, and the material transported by the conveyor belt freely falls into the fixed trough and is temporarily stored in the fixed trough.

[0013] In the present application, the opening and closing of the two side-opening hoppers are completed by driving the piston rod of the cylinder to move, and at the same time, the arc-shaped baffle is driven to rotate, so that the side-opening hopper feeds the next process equipment (such as a ball mill) while the material on the upper conveyor belt is blocked by the arc-shaped baffle for temporary retention. This avoids the spillage of mineral materials caused by the continuous conveying of the conveyor belt during feeding, thereby achieving accurate control of the feeding amount of the ball mill by the side-opening hopper each time.

[0014] The fixed trough and the side-opening hopper are driven by the same driving cylinder to ensure that the material will not spill during the intermittent emptying of the side-opening hopper. The arc-shaped baffle can catch the falling material during the emptying of the side-opening hopper, preventing the loss of material during the emptying of the side-opening hopper, avoiding material waste and ensuring accurate feeding of the side-opening hopper.

[0015] The cylinder is selected as the prime mover for the material dumping movement. The cylinder has many advantages such as high efficiency, adjustability, reliability, and wide applicability, so that the material dumping movement can be effectively completed. The cylinder is selected instead of a high-power motor to control the feeding process of the silo, which saves working space and work costs, and has faster work efficiency, lower working energy consumption, and reduced energy loss.

[0016] Preferably, the angle between the bottom plate of the fixed trough and the horizontal plane is 60 degrees to 65 degrees.

[0017] Preferably, the driving cylinder extends in the front-rear direction and is arranged on the cylinder bracket, ensuring that the driving cylinder can better push the first connecting rod structure and the second connecting rod structure when working, thereby ensuring the transportation of materials.

[0018] Preferably, the first connecting rod structure comprises a first connecting rod, one end of the first connecting rod is hinged to the driving block, and the other end of the first connecting rod is hinged to the arc-shaped baffle.

[0019] Preferably, the second connecting rod structure includes a second connecting rod, a transfer block and a third connecting rod, one end of the second connecting rod is hinged to the driving block, the other end of the second connecting rod is hinged to the transfer block, one end of the third connecting rod is hinged to the transfer block, and the other end of the third connecting rod is hinged to the left hopper or the right hopper on the corresponding side.

[0020] Preferably, the angle between the left hopper and the right hopper after they are turned outward is about 100-120 degrees, so as to ensure that the materials in the hopper can fall quickly and complete the rapid dumping of the materials, so as to avoid that some materials are stuck on the hopper wall and cannot fall.

[0021] Preferably, a side-opening hopper is arranged above the feed inlet of the ball mill to achieve quantitative feeding to the ball mill.

[0022] Preferably, a weight measuring support frame is provided on the upper part of the left support shaft and the right support shaft, and the left support shaft and the right support shaft are fixedly connected to the weight measuring support frame on the corresponding side through pressure sensors, and the support shaft on the corresponding side is fixed by the weight measuring support frame, that is, the support shaft on the corresponding side is weighed by the weight measuring support frame. Thus, the two weight measuring support frames suspend the side-opening hopper in mid-air through the left support shaft and the right support shaft, and the two pressure sensors are used to accurately measure the amount of material in the side-opening hopper and transmit the material amount signal. Thus, the pressure sensor is used to accurately measure and control the feeding amount each time, solving the problem of poor manual feeding amount control and excessive labor intensity.

[0023] Preferably, a pair of roller crushing mechanism is arranged above the rear side of the conveyor belt, and the pair of roller crushing mechanism comprises a shell, a crushing chamber is arranged inside the shell, an upper hopper connected to the crushing chamber is arranged on the upper part of the shell, and a blanking port connected to the crushing chamber is arranged at the bottom of the shell, and the blanking port is located above the conveyor belt, and a fixed roller and a movable roller arranged in parallel are arranged in the crushing chamber, and a crushing and blanking gap is formed between the fixed roller and the movable roller, and both ends of the fixed roller are rotatably installed on the shell, and the roller shaft of the fixed roller is connected to the first driving motor through a transmission device, and both ends of the movable roller can be rotatably installed on the sliding seat on the corresponding side, and slide rails matching the sliding seat on the corresponding side are correspondingly arranged on both sides of the shell, and the sliding seat can be slidably installed on the sliding rail on the corresponding side along the slide rail, and the extending direction of the slide rail is perpendicular to the axis of the movable roller, and a handwheel mechanism that drives the slider to slide along the slide rail and fixes the slider is also installed on the corresponding side of the shell, and the roller shaft of the movable roller is connected to the second driving motor through a transmission device. Therefore, the distance between the two rollers of the roller crushing mechanism can be adjusted by operating the hand wheel mechanism to meet the needs of different working conditions and different mineral materials.

[0024] A second aspect of an embodiment of the present invention provides a working method of the material conveying and feeding device, comprising the following steps:

[0025] S1. The piston rod of the driving cylinder is retracted, and the driving block drives the left hopper to rotate around the inner side of the left supporting axis through two second connecting rod structures, and the right hopper rotates around the inner side of the right supporting axis at the same time, and the left hopper and the right hopper are assembled into a complete hopper;

[0026] At the same time, the driving block drives the arc-shaped baffle plate to rotate downward around the common axis of the two first rotating shafts through the first connecting rod structure, and the arc-shaped baffle plate rotates to the lower side of the bottom plate of the fixed material trough and opens the front end opening of the fixed material trough;

[0027] At this time, the material transported by the conveyor belt falls freely to the fixed trough, and the material in the fixed trough falls freely through the front opening of the fixed trough to the complete side-opening hopper;

[0028] S2. When the material in the side-opening hopper reaches the target weight, the piston rod of the driving cylinder extends out, and the driving block drives the left hopper to rotate outward around the left supporting shaft through two second connecting rod structures, and the right hopper rotates outward around the right supporting shaft at the same time. The gap between the left hopper and the right hopper forms a material opening, and the material in the opening completes the feeding to the next process;

[0029] At the same time, the driving block drives the arc-shaped baffle plate to rotate upward around the common axis of the two first rotating shafts through the first connecting rod structure, and closes the front end opening of the fixed material trough;

[0030] At this time, the material transported by the conveyor belt falls freely into the fixed trough and is temporarily stored in the fixed trough;

[0031] S3. After the material in the side opening hopper is emptied, step S1 is repeated.

[0032] Preferably, in the step S2 in which the material contained in the side-opening hopper reaches the target weight, a pressure sensor is used to accurately measure the amount of material in the side-opening hopper. Furthermore, the pressure sensor transmits and feedbacks signals through an external PLC, and the pressure sensor transmits the material amount signal of the side-opening hopper to the PLC. When the value measured by the pressure sensor reaches the value of each feeding amount set by the program, the PLC drives the cylinder telescopic rod to move.

[0033] One or more technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0034] In the present application, the opening and closing of the two side-opening hoppers are completed by driving the piston rod of the cylinder to move, and at the same time, the arc-shaped baffle is driven to rotate, so that the side-opening hopper feeds the next process equipment while the material on the upper conveyor belt is blocked by the arc-shaped baffle for temporary retention. This avoids the spillage of mineral materials caused by the continuous conveying of the conveyor belt during feeding, thereby realizing accurate control of the feeding amount of the ball mill by the side-opening hopper each time.

[0035] The fixed trough and the side-opening hopper are driven by the same driving cylinder to ensure that the material will not spill during the intermittent emptying of the side-opening hopper. The arc-shaped baffle can catch the falling material during the emptying of the side-opening hopper, preventing the loss of material during the emptying of the side-opening hopper, avoiding material waste and ensuring accurate feeding of the side-opening hopper.

[0036] The cylinder is selected as the prime mover for the material dumping movement. The cylinder has many advantages such as high efficiency, adjustability, reliability, and wide applicability, so that the material dumping movement can be effectively completed. The cylinder is selected instead of a high-power motor to control the feeding process of the silo, which saves working space and work costs, and has faster work efficiency, lower working energy consumption, and reduced energy loss.

[0037] By setting up a double-roll crushing mechanism to perform secondary crushing of the material, the problem of uncontrollable ball milling efficiency and quality caused by excessive distribution of ore size and irregular size of ore delivered at different times is solved, ensuring that the size of the ore is uniform and reducing errors in subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of this application;

[0039] Figure 2 This is a schematic diagram of the structure of the fixed trough and side-opening hopper of the present application;

[0040] Figure 3 This is a structural schematic diagram of the fixed trough and side-opening hopper of the present application from another perspective;

[0041] Figure 4 This is a schematic diagram of the structure of the double-roll crushing mechanism of the present application after removing part of the shell.

[0042] In the figure: 100-conveyor belt, 200-fixed trough, 201-bottom plate, 202-left baffle, 203-right baffle, 204-arc baffle, 205-connecting plate, 206-first rotating shaft, 401-driving block, 402-first connecting rod structure, 4021-first connecting rod, 400-driving cylinder, 300-side opening hopper, 301-left hopper, 302-right hopper, 303-left supporting shaft, 304-right supporting shaft, 403-second connecting rod structure, 4031-second connecting rod, 4032-adapter block, 4033-third connecting rod, 501-weighing support frame, 502-pressure sensor, 600-double roller crushing mechanism, 601-shell, 602-upper hopper, 603-fixed roller, 604-moving roller, 605-slide seat, 606-handwheel mechanism. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] like Figure 1 As shown, the present application provides a material conveying and loading device, including a conveyor belt 100 for conveying materials, with the conveying direction of the materials on the conveyor belt 100 being from back to front, and a fixed material trough 200 for receiving the materials conveyed by the conveyor belt 100 is provided at a lower position of the front end of the conveyor belt 100.

[0045] Combination Figure 2 and Figure 3 As shown, the fixed material trough 200 includes a bottom plate 201 inclined downward from the back to the front, and a left baffle plate 202 and a right baffle plate 203 respectively arranged on both sides of the bottom plate 201 and approximately perpendicular to the bottom plate 201. The front edges of the left baffle plate 202 and the right baffle plate 203 are arc-shaped and symmetrical to each other, and the center of the front arc-shaped edge is located on the corresponding baffle plate. The front sides of the left baffle plate 202 and the right baffle plate 203 are provided with an arc-shaped baffle plate 204 for closing the front end opening of the fixed material trough 200. The inner sides of the arc-shaped baffle plate 204 are respectively fitted with the front edges of the bottom plate 201, the left baffle plate 202 and the right baffle plate 203. The left and right sides of the arc-shaped baffle plate 204 are rotatably installed on the baffle plates on the corresponding sides through the connecting plate 205 and the first rotating shaft 206. The two first rotating shafts 206 are respectively provided with the first rotating shaft 206. 06 and the center of the arc edge of the front end of the two side baffles coincide, the bottom of the arc baffle 204 is connected to the driving block 401 through the first connecting rod structure 402, and the driving block 401 is fixedly connected to the piston rod of the driving cylinder 400. When the piston rod of the driving cylinder 400 is extended, the driving block 401 drives the arc baffle 204 to rotate upward around the common axis of the two first rotating shafts 206 through the first connecting rod structure 402, and closes the front end opening of the fixed material trough 200; when the piston rod of the driving cylinder 400 is retracted, the driving block 401 drives the arc baffle 204 to rotate downward around the common axis of the two first rotating shafts 206 through the first connecting rod structure 402, and the arc baffle 204 rotates to the lower side of the bottom plate 201 of the fixed material trough 200 and opens the front end opening of the fixed material trough 200.

[0046] A side-opening hopper 300 for receiving materials discharged from the fixed trough 200 is provided at a lower position of the front end portion of the fixed trough 200. The side-opening hopper 300 includes a left hopper 301 and a right hopper 302 respectively arranged on the left and right sides. The left side of the left hopper 301 is rotatably mounted on the left support shaft 303 through a support ear, and the right side of the right hopper 302 is rotatably mounted on the right support shaft 304 through a support ear. The left support shaft 303 and the right support shaft 304 both extend in the front-to-back direction and are fixed by support members. The bottoms of the left hopper 301 and the right hopper 302 are respectively connected to the driving block 401 through a second connecting rod structure 403. When the piston rod of the driving cylinder 400 is retracted, the driving block 401 drives the left hopper 301 to rotate inward around the left support shaft 303 through the two second connecting rod structures 403. The right hopper 302 rotates inward around the right support shaft 304, and the left hopper 301 and the right hopper 302 are assembled into a complete hopper. At this time, the fixed trough 200 is in a state of open front end opening, and the material in the fixed trough 200 falls freely into the hopper; when the piston rod of the driving cylinder 400 is extended, the driving block 401 drives the left hopper 301 to rotate outward around the left support shaft 303 through two second connecting rod structures 403, and at the same time, the right hopper 302 rotates outward around the right support shaft 304. The gap between the left hopper 301 and the right hopper 302 forms a material drop opening, and the material in the material opening completes the loading of the next process. At this time, the fixed trough 200 is in a state of front end opening closed by the arc baffle 204, and the material transported by the conveyor belt 100 falls freely into the fixed trough 200 and is temporarily stored in the fixed trough 200.

[0047] In the present application, the opening and closing of the two side-opening hoppers 300 are completed by driving the piston rod movement of the cylinder 400, and at the same time, the arc-shaped baffle 204 is driven to rotate, so that the side-opening hopper 300 feeds the next process equipment (such as a ball mill) while the material on the upper conveyor belt 100 is blocked by the arc-shaped baffle 204 for a short retention, which avoids the spillage of mineral materials caused by the continuous conveying of the conveyor belt 100 during feeding, thereby realizing the accurate control of the feeding amount of the ball mill by the side-opening hopper 300 each time.

[0048] The fixed trough 200 and the side-opening hopper 300 are driven in conjunction by the same driving cylinder 400, ensuring that materials will not spill during the intermittent pouring of the side-opening hopper 300, and that the arc-shaped baffle 204 can catch the falling materials during the pouring of the side-opening hopper 300, preventing material loss during the pouring of the side-opening hopper 300, avoiding material waste and ensuring accurate feeding of the side-opening hopper 300.

[0049] The cylinder is selected as the prime mover for the material dumping movement. The cylinder has many advantages such as high efficiency, adjustability, reliability, and wide applicability, so that the material dumping movement can be effectively completed. The cylinder is selected instead of a high-power motor to control the feeding process of the silo, which saves working space and work costs, and has faster work efficiency, lower working energy consumption, and reduced energy loss.

[0050] Preferably, the angle between the bottom plate 201 of the fixed trough 200 and the horizontal plane is 60 degrees to 65 degrees.

[0051] Preferably, the driving cylinder 400 extends in the front-rear direction and is arranged on the cylinder bracket, ensuring that the driving cylinder 400 can better push the first connecting rod structure 402 and the second connecting rod structure 403 when working, thereby ensuring the transportation of materials.

[0052] Preferably, the first connecting rod structure 402 includes a first connecting rod 4021 , one end of the first connecting rod 4021 is hinged to the driving block 401 , and the other end of the first connecting rod 4021 is hinged to the arc-shaped baffle 204 .

[0053] Preferably, the second connecting rod structure 403 includes a second connecting rod 4031, a transfer block 4032 and a third connecting rod 4033, one end of the second connecting rod 4031 is hinged to the driving block 401, the other end of the second connecting rod 4031 is hinged to the transfer block 4032, one end of the third connecting rod 4033 is hinged to the transfer block 4032, and the other end of the third connecting rod 4033 is hinged to the left hopper 301 or the right hopper 302 on the corresponding side.

[0054] Preferably, the side-opening hopper 300 is welded from cold-rolled steel plates with high strength, good toughness and strong corrosion resistance. The left support shaft 303 and the right support shaft 304 are made of 45 steel; the inlet diameter of the side-opening hopper 300 is about 0.4m, and the feed capacity is about 30~50kg; the opening and closing time of each emptying of the side-opening hopper 300 is set at 1~1.5s.

[0055] Preferably, the angle between the left hopper 301 and the right hopper 302 after flipping outward is about 100-120 degrees, so as to ensure that the material in the hopper can fall quickly and complete the rapid dumping of the material to avoid part of the material being retained on the hopper wall and unable to fall.

[0056] Preferably, the side-opening hopper 300 is disposed above the feed port of the ball mill to achieve quantitative feeding of the ball mill.

[0057] Preferably, reference Figure 1 , Figure 2As shown, a weight measuring support frame 501 is provided on the upper part of the left support shaft 303 and the right support shaft 304. The left support shaft 303 and the right support shaft 304 are respectively fixedly connected to the weight measuring support frame 501 on the corresponding side through the pressure sensor 502, and the support shaft on the corresponding side is fixed by the weight measuring support frame 501. Thus, the two weight measuring support frames 501 suspend the side-opening hopper 300 in mid-air through the left support shaft 303 and the right support shaft 304, and the two pressure sensors 502 are used to accurately measure the amount of material in the side-opening hopper 300 and transmit the amount signal. Thus, the pressure sensor 502 is used to accurately measure and control the feeding amount each time, solving the problem of poor manual feeding amount regulation and excessive labor intensity. Furthermore, the pressure sensor 502 transmits and feeds back signals through an external PLC (programmable logic controller). The pressure sensor 502 transmits the material quantity signal of the side-opening hopper 300 to the PLC. After the value measured by the pressure sensor 502 reaches the value of each feeding quantity set by the program, the PLC drives the telescopic rod of the cylinder 400 to move, driving the side-opening hopper 300 to open, and at the same time drives the arc-shaped baffle 204 to flip to prevent the mineral materials on the conveyor belt 100 from falling, thereby achieving consistency and controllability of each feeding quantity.

[0058] Preferably, the dumping amount is determined only by recording the difference in weight change of the side-opening hopper 300 before and after dumping through the pressure sensor 502, which can effectively avoid the influence of weight deviation introduced by factors such as material adhesion, deviation of the pressure sensor 502, and silo wear.

[0059] Furthermore, the conveyor belt 100 motor can be controlled by PLC, and the opening and closing times of the side opening hopper 300 in a unit time (such as 1 min) can be recorded by the limit switch. After judgment by the program, the feeding amount in a unit time can be regulated by changing the speed of the conveyor belt 100 motor.

[0060] Preferably, combined Figure 1 , Figure 4As shown, a pair of roller crushing mechanism 600 is arranged above the rear side of the conveyor belt 100, and the pair of roller crushing mechanism 600 includes a shell 601, a crushing chamber is arranged inside the shell 601, an upper hopper 602 connected to the crushing chamber is arranged on the upper part of the shell 601, and a material drop opening connected to the crushing chamber is arranged at the bottom of the shell 601, and the material drop opening is located above the conveyor belt 100. A fixed roller 603 and a movable roller 604 arranged in parallel are arranged in the crushing chamber, and a crushing and material drop gap is formed between the fixed roller 603 and the movable roller 604, and both ends of the fixed roller 603 are rotatably installed on the shell 601, and the roller shaft of the fixed roller 603 is connected to the first driving motor through a transmission device, and both ends of the mobile roller 604 can be rotatably installed on the slide seat 605 on the corresponding side, and the two sides of the shell 601 are correspondingly provided with slide rails matching the slide seat 605 on the corresponding side, and the slide seat 605 can be slidably installed on the slide rail on the corresponding side along the slide rail, and the extension direction of the slide rail is perpendicular to the axis of the mobile roller 604. The corresponding side of the shell 601 is also equipped with a handwheel mechanism 606 that drives the slider to slide along the slide rail and fixes the slider. The roller shaft of the mobile roller 604 is connected to the second driving motor through a transmission device. Therefore, by operating the handwheel mechanism 606, the spacing between the two rollers of the roller crushing mechanism 600 can be adjusted to meet the needs of different working conditions and different mineral materials. By setting the roller crushing mechanism 600 to perform secondary crushing on the material, the problem of uncontrollable ball milling efficiency and ball milling quality caused by excessive distribution of mineral material size and irregular size of mineral materials transported at different time periods is solved, and the size of the mineral material is uniform, which reduces the error of subsequent work.

[0061] Preferably, the size distribution of the material after being crushed by the roller crushing mechanism 600 is about 5 mm to 20 mm, and then falls onto the conveyor belt 100 below and is transported forward by the conveyor belt 100.

[0062] Preferably, the surfaces of the fixed roller 603 and the movable roller 604 are treated with plasma sprayed hard alloy to meet the production requirements of secondary crushing of high-hardness mineral materials.

[0063] A second aspect of an embodiment of the present invention provides a working method of the material conveying and feeding device, comprising the following steps:

[0064] S1. The piston rod of the driving cylinder 400 is retracted, and the driving block 401 drives the left hopper 301 to rotate inward around the left support shaft 303 through two second connecting rod structures 403, and the right hopper 302 rotates inward around the right support shaft 304 at the same time, and the left hopper 301 and the right hopper 302 are assembled into a complete hopper;

[0065] At the same time, the driving block 401 drives the arc-shaped baffle plate 204 to rotate downward around the common axis of the two first rotating shafts 206 through the first connecting rod structure 402, and the arc-shaped baffle plate 204 rotates to the lower side of the bottom plate 201 of the fixed material trough 200 and opens the front end of the fixed material trough 200;

[0066] At this time, the material conveyed by the conveyor belt 100 falls freely to the fixed trough 200, and the material in the fixed trough 200 falls freely through the front end opening of the fixed trough 200 to the side-opening hopper 300 that is assembled completely;

[0067] S2. After the material in the side-opening hopper 300 reaches the target weight, the piston rod of the driving cylinder 400 extends, and the driving block 401 drives the left hopper 301 to rotate outward around the left support shaft 303 through two second connecting rod structures 403, and at the same time, the right hopper 302 rotates outward around the right support shaft 304, and the gap between the left hopper 301 and the right hopper 302 forms a material opening, and the material in the material opening completes the feeding of the next process;

[0068] At the same time, the driving block 401 drives the arc-shaped baffle plate 204 to rotate upward around the common axis of the two first rotating shafts 206 through the first connecting rod structure 402, and closes the front end opening of the fixed material trough 200;

[0069] At this time, the material conveyed by the conveyor belt 100 falls freely into the fixed trough 200 and is temporarily stored in the fixed trough 200;

[0070] S3. After the materials in the side-opening hopper 300 are emptied, step S1 is repeated.

[0071] Preferably, in the step S2 in which the material contained in the side-opening hopper 300 reaches the target weight, the pressure sensor 502 is used to accurately measure the amount of material in the side-opening hopper 300. Further, the pressure sensor 502 transmits and feedbacks signals through an external PLC, and the pressure sensor 502 transmits the material amount signal of the side-opening hopper 300 to the PLC. When the value measured by the pressure sensor 502 reaches the value of each feeding amount set by the program, the PLC drives the cylinder telescopic rod to move.

[0072] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The words "comprise" or "include" do not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The use of the words first, second, and third, etc. does not indicate any order, and these words may be interpreted as names.

[0073] All features disclosed in this specification, except mutually exclusive features, can be combined in any way.

[0074] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0075] The present application is not limited to the aforementioned specific implementations, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A material conveying and feeding device, It is characterized in that The invention comprises a conveyor belt for conveying materials, wherein the conveying direction of the materials on the conveyor belt is from the back to the front, and a fixed material trough for receiving the materials conveyed by the conveyor belt is arranged at the lower position of the front end of the conveyor belt, The fixed material trough comprises a bottom plate inclined downward from the back to the front and a left baffle and a right baffle which are arranged on both sides of the bottom plate and are perpendicular to the bottom plate. The front end edges of the left baffle and the right baffle are arc-shaped and symmetrical to each other, and the center of the front arc-shaped edge is located on the corresponding baffle. The front sides of the left baffle and the right baffle are provided with arc-shaped baffles for closing the front end opening of the fixed material trough. The inner sides of the arc-shaped baffles are respectively fitted with the front edges of the bottom plate, the left baffle and the right baffle. The left and right sides of the arc-shaped baffles are rotatably installed on the baffles on the corresponding sides through the connecting plate and the first rotating shaft. The two first rotating shafts are The axis and the center of the arc edge of the front end of the two side baffles are coincident, the bottom of the arc baffle is connected to the driving block through the first connecting rod structure, the driving block is fixedly connected to the piston rod of the driving cylinder, when the piston rod of the driving cylinder is extended, the driving block drives the arc baffle to rotate upward around the common axis of the two first rotating shafts through the first connecting rod structure, and closes the front end opening of the fixed material trough; when the piston rod of the driving cylinder is retracted, the driving block drives the arc baffle to rotate downward around the common axis of the two first rotating shafts through the first connecting rod structure, the arc baffle rotates to the lower side of the bottom plate of the fixed material trough and opens the front end opening of the fixed material trough; A side-opening hopper for receiving materials discharged from the fixed trough is provided at a lower position of the front end portion of the fixed trough, and the side-opening hopper includes a left hopper and a right hopper respectively arranged on the left and right sides, the left side of the left hopper is rotatably mounted on the left support shaft through a support ear, and the right side of the right hopper is rotatably mounted on the right support shaft through a support ear, the left support shaft and the right support shaft both extend in the front-to-back direction and are fixed by a support member, and the bottoms of the left hopper and the right hopper are respectively connected to the driving block through a second connecting rod structure, and when the piston rod of the driving cylinder is retracted, the driving block drives the left hopper to rotate inward around the left support shaft through the two second connecting rod structures, and at the same time, the right The hopper rotates inwardly around the right supporting axis, and the left hopper and the right hopper are assembled into a complete hopper. At this time, the fixed trough is in a state of open front end opening, and the material in the fixed trough freely falls into the hopper; when the piston rod of the driving cylinder is extended, the driving block drives the left hopper to rotate outwardly around the left supporting axis through two second connecting rod structures, and at the same time, the right hopper rotates outwardly around the right supporting axis. The gap between the left hopper and the right hopper forms a material drop opening, and the material in the material opening completes the feeding of the next process. At this time, the fixed trough is in a state of front end opening closed by an arc-shaped baffle, and the material transported by the conveyor belt freely falls into the fixed trough and is temporarily stored in the fixed trough.

2. A material conveying and feeding device as claimed in claim 1, It is characterized in that The angle between the bottom plate of the fixed trough and the horizontal plane is 60 degrees to 65 degrees.

3. A material conveying and feeding device as claimed in claim 1, It is characterized in that The driving cylinder extends along the front-rear direction and is arranged on the cylinder bracket.

4. A material conveying and feeding device as claimed in claim 1 or 3, It is characterized in that The first connecting rod structure comprises a first connecting rod, one end of which is hinged to the driving block, and the other end of which is hinged to the arc-shaped baffle.

5. A material conveying and feeding device as claimed in claim 1 or 3, It is characterized in that The second connecting rod structure includes a second connecting rod, a transfer block and a third connecting rod, one end of the second connecting rod is hinged to the driving block, the other end of the second connecting rod is hinged to the transfer block, one end of the third connecting rod is hinged to the transfer block, and the other end of the third connecting rod is hinged to the left hopper or the right hopper on the corresponding side.

6. A material conveying and feeding device as claimed in claim 1, It is characterized in that The side-opening hopper is arranged above the feeding port of the ball mill.

7. A material conveying and feeding device as claimed in claim 1, It is characterized in that A weight measuring support frame is provided on the upper part of the left support shaft and the right support shaft. The left support shaft and the right support shaft are fixedly connected to the weight measuring support frame on the corresponding side through pressure sensors respectively, and the support shaft on the corresponding side is fixed by the weight measuring support frame.

8. A material conveying and feeding device as claimed in claim 1, It is characterized in that A pair of roller crushing mechanism is arranged above the rear side of the conveyor belt, and the pair of roller crushing mechanism includes a shell, a crushing chamber is arranged inside the shell, a loading hopper connected to the crushing chamber is arranged on the upper part of the shell, and a blanking port connected to the crushing chamber is arranged at the bottom of the shell, and the blanking port is located above the conveyor belt, and a fixed roller and a movable roller arranged in parallel are arranged in the crushing chamber, and a crushing and blanking gap is formed between the fixed roller and the movable roller, and both ends of the fixed roller are rotatably installed on the shell, and the roller shaft of the fixed roller is connected to the first driving motor through a transmission device, and both ends of the movable roller are rotatably installed on the sliding seat on the corresponding side, and slide rails matching the sliding seat on the corresponding side are correspondingly arranged on both sides of the shell, and the sliding seat can be slidably installed on the sliding rail on the corresponding side along the slide rail, and the extending direction of the slide rail is perpendicular to the axis of the movable roller, and a handwheel mechanism that drives the slider to slide along the slide rail and fixes the slider is also installed on the corresponding side of the shell, and the roller shaft of the movable roller is connected to the second driving motor through a transmission device.

9. A working method of the material conveying and feeding device according to any one of claims 1 to 8, It is characterized in that The following steps are involved: S1. The piston rod of the driving cylinder is retracted, and the driving block drives the left hopper to rotate around the inner side of the left supporting axis through two second connecting rod structures, and the right hopper rotates around the inner side of the right supporting axis at the same time, and the left hopper and the right hopper are assembled into a complete hopper; At the same time, the driving block drives the arc-shaped baffle plate to rotate downward around the common axis of the two first rotating shafts through the first connecting rod structure, and the arc-shaped baffle plate rotates to the lower side of the bottom plate of the fixed material trough and opens the front end opening of the fixed material trough; At this time, the material transported by the conveyor belt falls freely to the fixed trough, and the material in the fixed trough falls freely through the front opening of the fixed trough to the complete side-opening hopper; S2. When the material in the side-opening hopper reaches the target weight, the piston rod of the driving cylinder extends out, and the driving block drives the left hopper to rotate outward around the left supporting shaft through two second connecting rod structures, and the right hopper rotates outward around the right supporting shaft at the same time. The gap between the left hopper and the right hopper forms a material opening, and the material in the opening completes the feeding to the next process; At the same time, the driving block drives the arc-shaped baffle plate to rotate upward around the common axis of the two first rotating shafts through the first connecting rod structure, and closes the front end opening of the fixed material trough; At this time, the material transported by the conveyor belt falls freely into the fixed trough and is temporarily stored in the fixed trough; S3. After the material in the side opening hopper is emptied, step S1 is repeated.

10. The working method of the material conveying and feeding device according to claim 9, It is characterized in that In the step S2 in which the material contained in the side-opening hopper reaches the target weight, a pressure sensor is used to accurately measure the amount of material in the side-opening hopper.

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