CN116729893A - Belt feeder with weigh function - Google Patents

Abstract

The invention relates to a belt feeder with a weighing function, and belongs to the technical field of material conveying equipment. The invention comprises a belt conveyor, a material guiding chute, a flexible supporting plate, a belt scale and an excitation device, wherein the belt scale is arranged at the lower part of a conveyor belt, the upper part of the material guiding chute is connected at the lower part of a storage bin, the lower part of the material guiding chute is inserted into a side plate of a groove body, the length of the U-shaped flexible supporting plate is at least ensured to be flush with a discharge hole of the storage bin, the thickness of the upper parts of two side walls is smaller than that of the lower part, two ends of the U-shaped flexible supporting plate are connected to the outer side surfaces of the material guiding chute, the upper surface of the bottom surface of the flexible supporting plate is compounded with a wear-resistant steel plate, the lower surface of the flexible supporting plate is arranged on the upper surface of the excitation device, the material guiding chute and the side plate of the groove body are in a splayed structure with the upper part being small in the height direction, and in the feeding direction, the flexible supporting plate is also in a tapered structure with the lower part being large in the feeding direction. The gap between the lower part of the side plate of the groove body and the conveying belt is also in a conical structure with small inlet and large outlet. The invention has the advantages of high weighing precision and strong adaptability when being applied to weighing and feeding of massive and water-containing materials.

Description

Belt feeder with weigh function

Technical Field

The invention relates to a belt feeder with a weighing function, and belongs to the technical field of material conveying equipment.

Background

The material is transported by using a feeder in a large amount in the modern industry, along with the progress of the modern industry and the improvement of the requirements on industrial control, the material is metered in the material transportation process, and the feeder with the weighing function has the following problems in the actual use process as the belt feeder has a series of advantages of stable operation, convenient feeding amount adjustment, low power consumption and the like, and simultaneously the weighing device is directly arranged at the lower part of the annular conveyer belt to meter the weight and the feeding amount of the material, so that the feeder is widely applied in the production: (1) Firstly, when large blocks of materials exist in the fed materials, the size of an outlet of the feeder is required to be large enough to ensure that the materials are smoothly fed out through the feeder under the condition that blocking does not occur, so that the thickness of the materials in the belt feeder is large, a relatively high tank body is required to limit the scattering of the materials in order to smoothly realize the conveying and weighing of the materials, after the tank body is arranged, the materials interact with the tank body to influence the gravity of the materials on a belt downwards, meanwhile, the large blocks of materials are conveyed forwards in the tank body and inevitably have friction and impact effects with the tank body, and because the tank body is motionless in the feeding process, an annular conveying belt at the lower part of the tank body has a certain gap between the annular conveying belt and the tank body, the finely broken materials can enter the gap in the feeding process, blocking occurs in the belt moving process, and all factors seriously influence the weighing precision of a weighing device arranged at the lower part of the annular conveying belt of the feeder. (2) Under some feeding conditions, the water content in the material is very high, the water and the finely crushed parts in the material are mixed to form sludge, and for some materials with relatively high adhesiveness, the sludge can flow out along gaps between the annular conveying belt and the groove body in the feeding and weighing process, and enter and are adhered to a carrier roller, a roller and a weighing device at the lower part of the annular conveying belt. Over time, these bonds will have a serious impact on the proper operation and weighing of the belt feeder and even cause the feeder to fail. (3) In the feeding process, bin pressure in the bin directly acts on the rear bottom plate of the belt feeder and the annular conveying belt, and the kinetic energy of bin pressure and material flow in the feeding process is changed in the bin, so that the weighing precision of the weighing device is seriously influenced, meanwhile, the driving force of the conveying belt is increased due to the influence of the bin pressure, the power consumption is improved, the abrasion and consumption of each part are greatly accelerated, and the working reliability of equipment is reduced. These factors severely limit the normal use of a weighing belt feeder and must be addressed by new process means.

Disclosure of Invention

The invention aims to provide the belt feeder with the weighing function, which can effectively solve the problems of inaccurate weighing precision and low equipment working reliability of the weighing belt feeder in the use process.

The purpose of the invention is realized in the following way: the utility model provides a belt feeder with weigh function, include belt conveyor, the guide chute, flexible layer board, the belt weigher, vibration excitation device, belt conveyor contains cell body curb plate, drive arrangement, cylinder and annular conveyer belt, the lower part at annular conveyer belt is installed to the belt weigher, guide chute upper portion is connected in the feed bin lower part, guide chute lower part inserts in the cell body curb plate, flexible layer board both ends are connected at the lateral surface of guide chute, flexible layer board's length guarantees at least with the feed bin discharge gate parallel and level, its shape is U type structure, the thickness of both sides wall upper portion is less than the thickness of lower part, its bottom surface upper surface complex has wear-resisting steel sheet, the lower surface is placed at vibration excitation device upper surface, vibration excitation device installs on the basis of keeping apart completely with belt conveyor.

The guide chute and the side plate of the chute body are splayed structures with small upper part and large lower part in the height direction, and are also tapered structures with small inlet and large outlet in the feeding direction.

The gap between the lower part of the side plate of the groove body and the annular conveying belt is also in a conical structure with small inlet and large outlet.

The upper parts of the two side walls of the flexible supporting plate are provided with arc structures protruding outwards.

The annular conveyer belt is of a T-shaped structure with a thick middle and thin two sides, and the thin edges at the two ends of the annular conveyer belt incline downwards from the middle to the two sides.

The two ends of the roller are convex, and the height of the convex is equal to the difference between the thickness of the edge of the annular conveying belt and the thickness of the middle of the annular conveying belt.

The flange is arranged at two ends of the roller, and the height of the flange is higher than the outer surface of the annular conveyer belt.

The side of the annular conveyer belt is provided with a dirt guide plate, one end of the dirt guide plate is inserted into the lower part of the edge of the annular conveyer belt, and the other end of the dirt guide plate extends out of the frame of the belt conveyer in a downward inclined way.

The length of the flexible supporting plate is at least guaranteed to be flush with the bin discharge hole, the flexible supporting plate covers the whole bin discharge hole, and therefore bin pressure of materials in a bin directly acts on the flexible supporting plate instead of acting on an annular conveying belt of a belt conveying device, the influence of bin pressure change in the bin on the weighing value of a belt scale at the lower part of the annular conveying belt can be effectively eliminated, weighing precision of the belt scale is guaranteed, but the flexible supporting plate at least covers the discharge hole in the length and width directions, the length is increased along with the flexible supporting plate, the installation space of a feeder is small, the installation inclination angle of the flexible supporting plate is small, the material can smoothly flow on the flexible supporting plate by dead weight under the small inclination angle, normal operation of the feeder is seriously influenced, and the lower surface of the flexible supporting plate is placed on the upper surface of an excitation device and directly contacted with the excitation device.

Because the flexible supporting plate is required to vibrate in the working process, the belt balance is sensitive to vibration, and the weighing value is possibly distorted due to slight vibration, effective measures are taken to isolate the vibration, the upper part of the material guiding chute is connected to the lower part of the material bin, the lower part of the material guiding chute is inserted into the side plate of the chute body, materials can be smoothly led into the belt conveyor from the material bin, and the materials are weighed by the belt conveyor and then led out of the feeder. The flexible supporting plate is connected to the outer side face of the guide chute, the flexible supporting plate is of a U-shaped structure, the thickness of the upper portion of the two side walls of the U-shaped structure, which is connected with the guide chute, is smaller than that of the lower portion, so that the service life of the side wall of the flexible supporting plate can be prolonged due to the fact that the thickness of the lower portion of the side wall, which is in direct contact with materials, is larger, the upper portion of the side wall is connected to the outer side wall of the guide chute, although the thickness is thinner, the side wall is protected by the guide chute, and meanwhile, the side wall is supported by the vibration excitation device in the working process, and the tensile force generated by the action of the gravity and bin pressure of the received downward materials is limited in a small range, so that the service life of the side wall is effectively guaranteed. Meanwhile, the part is thinner, so that the flexibility of the belt conveyor is improved, the vibration influence of the flexible supporting plate on the material guide chute and other equipment parts can be fully relieved in the process that the flexible supporting plate vibrates under the action of the vibration excitation device, the influence of the flexible supporting plate on the weighing precision value of the belt conveyor is reduced, and the belt conveyor has obvious advantages.

The flexible supporting plate is generally made of organic high polymer elastic materials, and although the flexible supporting plate can also be made of wear-resistant high polymer materials, the wear-resistant performance of the flexible supporting plate is still quite different from that of special metal wear-resistant materials, and therefore, a wear-resistant steel plate is compounded at the position where the upper surface of the bottom surface of the flexible supporting plate with a U-shaped structure is in direct contact with materials, so that the vibration isolation effect of the flexible supporting plate can be kept, and the service life of the flexible supporting plate can be effectively prolonged.

The guide chute and the chute body side plates are of a splayed structure with a small upper part and a large lower part in the height direction, so that the material side pressure of the material in the chute body side plates of the feeder due to the thickness increase is reduced, and the problem of reduction of weighing precision of the belt scale caused by inaccurate pressure of the material transferred to the annular conveyer belt of the belt conveyer is partially solved. The guide chute and the chute body side plates are of a conical structure with a small inlet and a large outlet in the feeding direction of the belt conveyor, and the width and the area of the guide chute and the chute body side plates are gradually increased in the material moving direction, so that the possibility that sundries such as blocky materials in the materials are blocked in the guide chute is greatly reduced, impact vibration generated to the annular conveyor belt in the feeding process after the blocking of the blocky materials is eliminated, and the weighing precision of the belt scale is improved.

Because there is the gap between cell body curb plate and the annular conveyer belt of belt conveyor, the problem that the particulate material is blocked in this gap can appear inevitably like this, after the card is blocked, the atress on the annular conveyer belt appears changing, directly influence the weighing precision of lower belt scale, for this reason also design the gap between cell body curb plate lower part and the annular conveyer belt for getting into little big toper structure, even the material granule card appears between the gap of annular conveyer belt and cell body curb plate at the in-process of forward motion like this, but because the in-process gap's of forward motion size increases gradually, the particulate material of blocking can flow out smoothly like this, eliminate the card and block to eliminate its influence to the weighing precision of belt scale.

The upper parts of the two side walls of the flexible supporting plate are provided with outwards-protruding arc structures, and the arc structures can further relieve vibration force transmitted to the material guiding chute in the vibration process of the flexible supporting plate, so that the influence of the vibration on the weighing precision of the belt scale is reduced.

If the water content of the materials fed by the belt conveyor is high, the water is likely to be mixed with the finely-divided materials, the formed sewage flows out of gaps between the side plates of the tank body and the annular conveyor belt to two sides of the annular conveyor belt, enters the belt scale, the roller and the carrier roller along the lower surface of the annular conveyor belt, and is accumulated for a long time to generate bonding hardening, so that the weighing precision of the belt scale and the normal use of the feeder are likely to be seriously affected, and in addition, if the annular conveyor belt is deviated in the feeding process of the feeder, the weighing precision of the belt scale and the normal operation of the belt conveyor are likely to be affected. Therefore, the annular conveyer belt is designed into a T-shaped structure with a thick middle part and thin two sides, the parts of the thin edges at the two ends of the annular conveyer belt incline downwards, meanwhile, the two ends of the roller are raised, the height of the raised parts is equal to the difference value between the edge thickness and the middle thickness of the annular conveyer belt, the two ends of the roller are provided with flanges, and the height of the flanges is higher than the outer surface of the annular conveyer belt. The design effectively ensures that the annular conveying belt is clamped at the fixed position on the roller, can prevent the annular conveying belt from moving left and right, has a positive effect on preventing the annular conveying belt from deviating, is provided with the flanges at the two ends of the roller, and can effectively prevent materials, sewage and the like from flowing out from the two sides of the roller and entering the inner side of the annular conveying belt.

The side of the annular conveyer belt is provided with the dirt guide plate, one end of the dirt guide plate is inserted into the lower part of the edge of the annular conveyer belt, the other end of the dirt guide plate is obliquely extended out of the frame of the belt conveyer, and the middle high edge of the thin edge parts at the two ends of the annular conveyer belt is low, so that sewage flowing out of a gap between the side plate of the trough body and the annular conveyer belt can be guided out of the belt conveyer to prevent the sewage from entering into elements inside the belt conveyer, thereby thoroughly solving the influence of the sewage on the operation of the belt scale and the belt conveyer, and having very positive effects on improving the weighing precision of the belt scale and ensuring the normal operation of the belt conveyer.

Drawings

Fig. 1, 2, 3 and 4 are schematic structural diagrams of an embodiment of the present invention, wherein fig. 1 is a front cross-sectional view of the schematic structural diagram of the present invention, fig. 2 is a right side view of fig. 1, fig. 3 is a partial enlarged view of a position a of fig. 1, and fig. 4 is a partial cross-sectional view of a position a-a of fig. 1.

Detailed Description

In the embodiments shown in fig. 1 and 2 and fig. 3 and 4, the meaning of the part numbers is as follows: 1. a conveyor; 2. a roller; 3. a side plate bracket; 4. side plate of the tank body: 5. a storage bin; 6. a gate; 7. a material guiding chute; 8. a bolt; 9. buffering the arc; 10. u-shaped flexible supporting plates; 11. a wear resistant steel plate; 12. a tank bottom plate; 13. a belt scale; 14. a vibration motor; 15. a damping device; 16. a carrier roller; 17. a vibration tank; 18. an endless conveyor belt; 19. a flange; 20. a support leg; 21. a dirt guide plate; 22. a driving device.

In the embodiment, a gate 6 is arranged at the discharge hole of a bin 5, a guide chute 7 is connected below the gate, a U-shaped flexible supporting plate 10 is made of a high polymer polyurethane elastomer, two side plates of the U-shaped flexible supporting plate are connected to the guide chute through bolts 8, the thickness of the upper part of the side plate of the U-shaped flexible supporting plate is one third of the thickness of the lower part of the side plate, meanwhile, a buffer arc 9 is arranged on an upper thin plate, a wear-resistant steel plate 11 is vulcanized and compounded on the upper surface of a bottom plate of the U-shaped flexible supporting plate, the lower surface of the bottom plate of the U-shaped flexible supporting plate is directly placed on a bottom plate 12 of a tank body, an excitation device consists of the bottom plate of the tank body, a vibration tank body 17, a vibration motor 14, a vibration device 15 and supporting legs 20, the bottom plate of the tank body is connected to the vibration tank body, the vibration motor is arranged at the lower part of the vibration tank body, the vibration tank body is arranged on the supporting legs through the vibration springs, and the supporting legs are directly arranged on a civil engineering foundation and isolated from the foundation of the belt conveying device. The guide chute and the U-shaped flexible supporting plate are inserted into a chute body side plate 4, the chute body side plate is installed on an equipment foundation through a side plate support 3, a belt conveyor is installed below the chute body side plate and consists of a roller 2, a carrier roller 16, an annular conveyor belt 18, a belt scale 13 and the like, the annular conveyor belt is of a T-shaped structure with a thick middle part and thin two sides, the thin sides at the two ends incline downwards from the middle to the two sides, anti-skid rubber is vulcanized on the outer surface of the roller, the two ends of the anti-skid rubber are raised, the height and the shape of the raised protrusions are equal to the difference between the thickness and the middle thickness of the edge of the annular conveyor belt, a flange 19 is arranged at the outermost side of the anti-skid rubber, the height of the flange protrudes a certain height outside the annular conveyor belt, a conveyor 1 is installed below the discharge end of the belt conveyor belt, a dirt guiding plate 21 is inserted below the thin sides at the two ends of the annular conveyor belt of the belt conveyor belt, and the dirt guiding plate inclines downwards from the position of the annular conveyor belt to the outside.

When feeding, firstly, the flat gate is opened, at this moment, the materials in the bin flow out from the bin and are piled up in the material guiding chute and the flexible supporting plate, and meanwhile, the materials are piled up on the annular conveying belt, and as the length of the U-shaped flexible supporting plate completely covers the discharge hole of the bin, the bin pressure generated by the materials in the bin does not directly act on the annular conveying belt, so that the weighing of the belt scale arranged at the lower part of the annular conveying belt is basically not influenced.

The driving device 22 is started, the driving device drives the roller to rotate, the annular conveying belt rotates under the driving of the roller, the materials accumulated at the discharge hole of the U-shaped flexible supporting plate are conveyed to the discharge end and finally conveyed into a conveyor arranged at the lower part of the belt conveying device, and the conveyor conveys the materials to a designated position. In the process, the weight generated by the weight of the material on the annular conveyer belt is pressed on a belt scale arranged at the lower part of the annular conveyer belt, the weight of the material on the belt is weighed by the belt scale, and the weight of the material passing through the belt conveyer device is calculated through relevant calculation, so that the weighing aim is realized.

Because the length of U type flexible layer board is longer, and the installation space of equipment under the storehouse is limited, so the installation inclination of U type flexible layer board is less, be less than 45, under this circumstances, the self-flow ability of material is relatively poor, in order to guarantee normal feed, the vibrating motor of drive vibration excitation device on U type flexible layer board lower part vibration excitation device is installed in the start, drive vibration excitation device vibration, and pass through vibration cell body and cell body bottom plate with the vibration transmission to U type flexible layer board on, after the vibration of U type flexible layer board, activate the material on it, make its flow change from static state to dynamic state, the angle of self-flow has been reduced, improve the flow ability of material on U type flexible layer board, guarantee the feed effect.

The U-shaped flexible supporting plate is characterized in that the abrasion-resistant steel plate is vulcanized on the bottom plate of the U-shaped flexible supporting plate, the abrasion-resistant performance of the abrasion-resistant steel plate is far higher than that of the polyurethane elastomer, so that the service life of the flexible supporting plate can be guaranteed, the thickness of the upper parts of the two side plates of the U-shaped flexible supporting plate is one third of the thickness of the lower parts, meanwhile, a buffer arc is arranged at the position, the protection is provided by the material guiding chute, meanwhile, the vibration exciting device at the lower parts is used for providing support, the weight of materials in the U-shaped flexible supporting plate does not need to be hung, and the vibration force transmitted to the belt conveying device and the belt scale can be effectively reduced while the service life of the U-shaped flexible supporting plate is guaranteed, so that the weighing precision of the belt scale is improved.

Because of the large pieces of material present in the material, the feed height of the feeder must reach a large value to ensure that the large pieces of material can be fed from the silo and conveyed on the conveyor. Because the width of the annular conveyer belt of the belt conveyer is limited, the groove body side plates are adopted to limit the materials on the upper part of the annular conveyer belt, the groove body side plates are of conical structures with small upper part, large lower part and large lower part, and meanwhile, gaps between the groove body side plates and the annular conveyer belt are also of conical structures with small lower part, after the groove body side plates of the structure are adopted, the influence of the material side pressure on the downward pressing gravity is effectively reduced, the possibility of impact vibration of the materials on the groove body due to forward movement in the feeding process is greatly reduced, the size of the gaps is of the structure with large lower part, the blocking of the granular materials possibly occurring in the gaps in the forward conveying process is effectively reduced, the pressure fluctuation of the materials on the annular conveyer belt after the blocking for a long time is lightened, and all the effects effectively improve the weighing precision of the belt scale on the materials on the lower part of the annular conveyer belt.

The structure of the annular conveyer belt is a T-shaped structure with a thick middle and thin two sides, wherein the thin edges at two ends incline downwards from the middle to two sides, anti-skid rubber is vulcanized on the outer surface of the roller, the two ends of the anti-skid rubber are raised, the raised height and the shape are equal to the difference value between the edge thickness and the middle thickness of the annular conveyer belt, a baffle edge is arranged at the outermost side of the anti-skid rubber, the height of the baffle edge protrudes outside the annular conveyer belt by a certain height, and the design can prevent the left and right movement of the annular conveyer belt on the roller on one hand, so that the belt of the belt conveyer belt is prevented from deviating, and on the other hand, the device also has the function of preventing sewage substances in materials from entering the belt conveyer inside from the roller, and simultaneously, the thin edges at two ends of the annular conveyer belt incline downwards from the middle to two sides, and the sewage guide plates are inserted at the lower sides of the thin edges at two ends of the annular conveyer belt of the belt conveyer belt, so that the sewage substances flowing out from the annular conveyer belt of the belt conveyer belt start to incline downwards from the two sides.

Claims (8)

1. The utility model provides a belt feeder with weigh function, contains belt conveyor, guide chute, flexible layer board, belt weigher, vibration excitation device, and belt conveyor contains cell body curb plate, drive arrangement, cylinder and annular conveyer belt, and the lower part at annular conveyer belt is installed to belt weigher, its characterized in that: the upper portion of the guide chute is connected to the lower portion of the storage bin, the lower portion of the guide chute is inserted into the side plate of the chute body, two ends of the flexible supporting plate are connected to the outer side face of the guide chute, the length of the flexible supporting plate is at least guaranteed to be flush with the discharge hole of the storage bin, the flexible supporting plate is of a U-shaped structure, the thickness of the upper portions of the two side walls is smaller than that of the lower portion, the upper surface of the bottom face of the flexible supporting plate is compounded with a wear-resistant steel plate, the lower surface of the flexible supporting plate is placed on the upper surface of the vibration excitation device, and the vibration excitation device is installed on the basis of being completely isolated from the belt conveyor.

2. The belt feeder with weighing function according to claim 1, characterized in that: the guide chute and the side plate of the chute body are splayed structures with small upper part and large lower part in the height direction, and are also tapered structures with small inlet and large outlet in the feeding direction.

3. The belt feeder with weighing function according to claim 2, characterized in that: the gap between the lower part of the side plate of the groove body and the annular conveying belt is also in a conical structure with small inlet and large outlet.

4. A belt feeder with weighing function according to claim 3, characterized in that: the upper parts of the two side walls of the flexible supporting plate are provided with arc structures protruding outwards.

5. The belt feeder with weighing function according to claim 4, characterized in that: the annular conveyer belt is of a T-shaped structure with a thick middle and thin two sides, and the thin edges at the two ends of the annular conveyer belt incline downwards from the middle to the two sides.

6. The belt feeder with weighing function according to claim 5, characterized in that: the two ends of the roller are convex, and the height of the convex is equal to the difference between the thickness of the edge of the annular conveying belt and the thickness of the middle of the annular conveying belt.

7. The belt feeder with weighing function according to claim 6, characterized in that: the flange is arranged at two ends of the roller, and the height of the flange is higher than the outer surface of the annular conveyer belt.

8. The belt feeder with weighing function according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: the side of the annular conveyer belt is provided with a dirt guide plate, one end of the dirt guide plate is inserted into the lower part of the edge of the annular conveyer belt, and the other end of the dirt guide plate extends out of the frame of the belt conveyer in a downward inclined way.