CN214359137U - Continuous conveying system for static metering materials - Google Patents

Abstract

The utility model provides a continuous conveying system for static metering materials, which comprises a bidirectional conveying belt connected below the discharge end of an unloading conveying belt, wherein a metering conveying unit A and a metering conveying unit B are respectively connected below the two ends of the bidirectional conveying belt; the metering and conveying units A, B all comprise trusses, weighing and metering sensors are arranged between the trusses and the machine frame, and conveying belts are arranged on the trusses. In the scheme, the metering and weighing task is completed by the metering and conveying unit A in the material receiving process of the metering and conveying unit B, the materials are conveyed to the downstream, the conveying belt is vacated to wait for the next material receiving and weighing process, and therefore the static accurate metering of the materials is completed, the continuous work of the bidirectional conveying belt is ensured, and the continuous unloading process of cabin materials is also ensured.

Description

Continuous conveying system for static metering materials

Technical Field

The utility model relates to a measurement and transport among the material continuous transportation process.

Background

The metering mode of the large-flow materials generally adopts a continuous accumulation automatic weighing machine and a discontinuous accumulation automatic weighing machine. The continuous accumulation automatic weighing apparatus refers to a belt conveyor metering scale, namely a belt scale, a spiral scale, a disc type metering rotor scale and a decrement scale (or a weightless scale). The continuous accumulation automatic weighing apparatus is also called a dynamic weighing apparatus, materials are measured in the moving process of continuous conveying, accumulated measurement is carried out according to the weight of a unit length and the speed of a unit time and in a calculus mode, the deviation between the collected data and the instantaneous weight of the unit length of the actual material in the operation state is large, the fluctuation of the accuracy stability of the measurement result of accumulated calculation is large, and the measurement under the conditions of large flow and high accuracy requirement is difficult to meet. The discontinuous accumulation automatic weighing apparatus refers to a fixed electronic weighing apparatus, materials are measured in a static state, and the non-continuous accumulation automatic weighing apparatus generally comprises a hopper scale, a truck scale, a platform scale and other representative weighing apparatuses, has high measuring precision, can meet the requirement of material trade measuring precision, but cannot meet the requirements of large flow, high material price and capability of realizing continuous work and measurement. The transportation mode of port, wharf and material is generally the transportation of belt conveyor, and its characteristics are large transportation quantity and low operation cost. The commodity with high material trade settlement price is generally in a cargo ship waterline mode, the measurement error value is large, and the value loss of commodity purchasers is large, so the problems of high material price in trade settlement, continuous and stable precision and continuous accumulated measurement under the state of large flow must be solved.

The powdery material conveyed by the conveyor from a port or a wharf is continuously conveyed to the metering device, and the dynamic metering in the continuous conveying process can be realized by mounting the belt weigher on the conveyor. Due to the fact that the conveying flow fluctuation is large, the belt of the belt conveyor is affected by the flow of the powdery material and the ambient temperature, belt tension changes greatly, two key technical parameters of the belt scale, such as a weight signal and a speed signal, change and fluctuation are abnormal under the instantaneous condition, the metering precision of the belt scale is affected, the chain code and weight verification method adopted in the daily use process for the belt scale is large in deviation compared with the actual metering precision, the actual metering precision is larger than 0.5%, and the belt conveyor is unstable. Although the belt weigher is widely used, the belt weigher cannot be accepted by both suppliers and suppliers as the trade settlement of the powdery materials, and for the purpose of realizing the settlement of the powdery materials of the belt conveyor, a metering system with the metering precision of more than 0.2 percent accepted by both suppliers and suppliers must be selected.

Chinese patent discloses a patent document entitled "bulk cargo terminal on-line continuous static measurement conveying system and conveying process" (CN103787097A), and aims to solve the technical problem of low measurement accuracy in calculating the unloading quantity through the draft change of the ship body. The technical scheme adopted by the method comprises a plurality of static metering bins 1 which are arranged in parallel, a loading conveyor 2 which is arranged above the static metering bins 1 and used for loading materials into the static metering bins 1, a first belt conveyor 3 which is used for transferring the materials from a cargo ship to the loading conveyor 2, and a second belt conveyor 5 which is arranged below the static metering bins 1 and used for conveying the materials to a transfer station 4. The system further comprises a buffer bin 6, a charging hole of the buffer bin 6 is correspondingly arranged below a discharging hole of the static metering bin, and a feeding machine 7 for feeding materials to the second belt conveyor 5 is arranged at the discharging hole of the buffer bin 6.

This prior art has following technical problem at least, and one is a plurality of static measurement feed bins 1 that set up side by side and the linking problem between the material loading conveyer 2, owing to have a plurality of static measurement feed bins 1, must require material loading conveyer 2 to carry the material respectively to the hopper import department of corresponding static measurement feed bin 1 promptly. The necessary indexing of the engagement is based on which movement is achieved and is not disclosed in the literature. If the static metering bin 1 is displaceable and the loading conveyor 2 is fixed, the weighing device of the static metering bin 1 and the vehicle-mounted hydraulic opening and closing mechanism are displaced along with the static metering bin, all accessories are displaced along with the static metering bin, and the direct result is that the pipeline arrangement and the guiding are complex; on the contrary, if the static metering bin 1 is fixed and the loading conveyor 2 is displaced, the problem of how to connect the loading conveyor 2 with the incoming material from the first conveying belt 3 will occur; secondly, the buffer bin 6 is correspondingly arranged below the static metering bin 1, the scheme of arranging the bins up and down is very difficult to do, because a plurality of layers of working (supporting) platforms are required to be arranged, the space height is too high, and meanwhile, the materials are conveyed to a high position, so that the equipment investment of the first conveying belt 3 and the occupied space field are increased undoubtedly; thirdly, the prior art does not disclose a specific scheme how to realize the metering process of the static metering bin 1 in the process of continuously conveying materials by the first conveying belt 3; even if a related weighing scheme is disclosed, the static metering bin 1 which is a metering object or a metering object is likely to influence the discharging efficiency of the static metering bin 1 due to the moisture content, the granularity, the adhesiveness and the like of the materials, and even the materials are difficult to discharge and even blocked and cannot be discharged, so that the continuous conveying and metering aim is only an ideal and attractive effect which cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a continuous conveyor system of static measurement material guarantees that the material in-process of unloading in succession implements static accurate measurement to the material that unloads.

In order to achieve the above purpose, the utility model adopts the following two basic technical schemes:

a continuous conveying system for static metering materials comprises a bidirectional conveying belt connected below the discharge end of an unloading conveying belt, wherein a metering conveying unit A and a metering conveying unit B are connected below the two ends of the bidirectional conveying belt respectively; the metering and conveying units A, B all comprise trusses, weighing and metering sensors are arranged between the trusses and the machine frame, and conveying belts are arranged on the trusses.

In the scheme, the metering and conveying unit A and the metering and conveying unit B are respectively connected below two ends of a bidirectional conveying belt, the bidirectional conveying belt is fixedly arranged, only the conveying belt can realize bidirectional conveying, namely, power is transmitted by reversing of a power mechanism or a transmission mechanism, the bidirectional conveying of the bidirectional conveying belt is realized, the continuous unloading of materials from a cabin is ensured, the continuously unloaded materials are alternately conveyed to the metering and conveying unit A and the metering and conveying unit B, namely, after the metering and conveying unit A receives the materials with bearing capacity, the bidirectional conveying belt unloads the metering and conveying unit B, the metering and conveying unit A finishes a metering and weighing task in the material receiving process of the metering and conveying unit B, conveys the materials to the downstream and vacates the conveying belt to wait for the next material receiving and weighing process, thus, the static accurate metering of the materials is finished, but also ensures the continuous work of the bidirectional conveying belt, and certainly ensures the continuous unloading process of the cabin materials.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is an enlarged schematic view of a portion of FIG. 2;

FIG. 5 is an enlarged schematic view of a portion of FIG. 3;

FIG. 6 is a schematic view of a valve;

fig. 7 is a schematic structural view of the discharge port.

Detailed Description

The first explanation is that the cargo ship arrives at the wharf and the port, the powder materials carried by the cargo ship are unloaded from the cargo hold through the conveying belt, and the powder materials arrive at the bidirectional conveying belt 10 of the utility model at first, and are conveyed to the downstream direction alternately by the bidirectional conveying belt 10 of the utility model, while the bidirectional conveying belt 10 receives the materials from the cargo hold continuously, so that the problem of continuous conveying of the materials is realized at first; and then the metering conveying unit A and the metering conveying unit B respectively carry out independent static metering on the received materials, so that the metering precision is ensured, and then the materials are conveyed to the downstream.

The utility model has the concrete scheme that the continuous conveying system for static metering materials comprises a bidirectional conveying belt 10 connected below the discharge end of an unloading conveying belt, and a metering conveying unit A and a metering conveying unit B are respectively connected below the two ends of the bidirectional conveying belt 10; the metering and conveying units A, B each include a truss 20, a weighing and metering sensor 40 is disposed between the truss 20 and the machine frame, and a conveyor belt 21 is disposed on the truss 20.

The metered material is taken up by the downstream conveying means and conveyed further downstream, for which purpose a transfer belt 60 engages beneath the discharge end of the conveyor belt 21.

In order to ensure the accuracy of the measurement, the two ends of the truss 20 are provided with weighing and metering sensors 40. More preferably, the two ends of the truss 20 are provided with weighing and metering sensors 40, and one end of the truss is symmetrically provided with two weighing and metering sensors. Firstly, the arrangement of the conveyor belt 21 by the truss 20 basically ensures the uniformity of material distribution so as to reduce the deformation of the middle section of the truss 20 caused by excessive winding, and in order to improve the metering accuracy, the weighing and metering sensors 40 are symmetrically arranged at each end, namely at least two weighing and metering sensors 40 are arranged at each end, so that accurate metering and weighing can be realized by one weighing and metering sensor 40 at each corner part of the bottom surface with the same height of the truss 20.

More preferably, one end of the conveying belt 21 is arranged in a high and low inclined manner, and the high end is a discharging end, the weighing and metering sensor 40 is arranged at the bottom of the truss 20 at the same height, and a buffer bin 50 is arranged between the discharging end of the conveying belt 21 and the receiving position of the transfer belt 60 below. The arrangement has the advantages that on one hand, the material receiving end of the conveying belt 21 is lower in position, so that the material coming from the upper part of the conveying belt is lower, the height of the material coming from the conveying belt is reduced, and the energy consumption for conveying the material and the difficulty for arranging equipment on the upper space and the lower space are reduced; on the other hand, can reserve out suitable height and arrange buffer bin 50 between the discharge end of conveyer belt 21 and the material receiving position of the transfer belt 60 of below, arrange buffer bin 50's benefit and lie in can avoiding the material raise dust phenomenon that the process of falling caused, can guarantee again that the material on the conveyer belt 21 of settlement time quantum is whole unloads away, guarantee that conveyer belt 21 is in the empty material state so that carry out next material receiving weighing task, so buffer bin 50 remains a small part of material and continues to fall and arrive transfer belt 60 and continue to accomplish subsequent transport task.

As the preferred scheme, the included angle alpha between the conveying belt 21 and the horizontal direction is 2-8 degrees. More preferably, the included angle alpha between the conveying belt 21 and the horizontal direction is 3-5 degrees. The above-mentioned range of the angle α is selected to satisfy the arrangement requirement of the buffer bin 50 in consideration of the length of the conveyor belt 21.

Referring to fig. 1, 2 and 3, each of the metering and conveying units A, B includes a bin 30 located at an upper portion, a lower end discharge port 34 of the bin 30 is connected to a material receiving portion of the conveying belt 21, and a discharge valve 33 is disposed at the lower end discharge port 34 of the bin 30. The bin 30 is arranged to have the function of blocking, so that the dust raising phenomenon in the falling process of the material is avoided; secondly, temporarily storing redundant materials after the surface of the conveying belt 21 is fully covered with the materials; thirdly, the materials on the bidirectional conveying belt 10 are prevented from directly falling onto the conveying belt 21, because the incoming materials received by the bidirectional conveying belt 10 are continuous, generally, the material receiving part of the bidirectional conveying belt 10 is the middle section part with the length, the two ends are the material discharging ends, when the time for firstly feeding the metering conveying unit A reaches the set time, the bidirectional conveying belt 10 needs to be stopped to stop feeding the metering conveying unit A, at the moment, one section of the belt surface of the bidirectional conveying belt 10 is provided with the materials, and one section of the belt surface is not provided with the materials, when the bidirectional conveying belt 10 runs reversely and turns to feed the metering conveying unit B, the material provided section on the belt surface of the bidirectional conveying belt 10 is covered with one layer of the materials, and then the normal single-layer materials are obtained, so that the phenomenon that the materials on the local belt surface of the conveying belt 21 on the side of the metering conveying unit B are excessive, namely, the materials on the belt surface of the conveying belt 21 cannot be uniformly distributed, in fact, the material unevenness of the conveyor belt 21 of the part A of the metering conveying unit exists. For this reason, it is also desirable to provide a conveyor belt with a wide belt width to accommodate the situation where there is a localized concentrated incoming material that might otherwise overflow over the belt edges. The storage bin 30 is arranged, the phenomenon can be completely avoided, namely, materials received by the conveying belt 21 come from the storage bin 30, the problem that the materials are uniformly distributed on the belt surface of the storage bin 30 is solved, and basic guarantee is provided for the accuracy of metering.

The discharge port of the storage bin 30 is provided with a discharge valve 33, so that the feeding to the conveying belt 21 can be ensured, the closing after the feeding is finished is ensured, and the static weighing of the materials on the conveying belt 21 is ensured.

The metering and conveying units A, B each include a bin 30 located at the upper part, and a surrounding hopper 38 is further provided between the lower end discharge port of the bin 30 and the lower end receiving part of the conveyor belt 21. As the materials in the storage bin 30 need to be subjected to the working of the vibrator once the phenomena such as arching and the like occur, the blanking flow can be obviously changed, and once the phenomena occur, the structure with the upper opening and the lower opening of the enclosing hopper 38 can ensure the passing of the materials and the even arrangement of the materials, and can also avoid the phenomenon that the materials fall to the outer side of the belt surface of the conveying belt 21 due to the overlarge falling flow of the materials in a short time.

In order to ensure the stability of the discharging of the storage bin 30 and the reliability when the storage bin is closed, the utility model provides a storage bin 30 assembly, which combines with the figure 6, namely the lower end discharging port of the storage bin 30 is composed of an area surrounded by four surrounding plates which are arranged oppositely in pairs, one pair is the first plate 31 with the lower plate edge being straight edge 311 arranged oppositely, the other pair is the second plate 32 with the lower plate edge being circular arc edge 3211 arranged oppositely, as shown in fig. 7, the curvature axis of the circular arc edge 321 is located above the circular arc edge, the discharge valve 33 includes a valve plate 331 whose plate surface is a circular arc surface and a side arm plate 332 extending upward and connected to the circular arc edge of the valve plate 331, the valve plate 331 is overlapped with the curvature axis of the circular arc edge 321, the upper end of the side arm plate 332 is hinged to the bin 30 at the curvature axis, and the upper plate surface of the valve plate 331 moves along the edge of the circular arc edge 321 to close or open the discharge port 34 when the valve plate 331 swings around the hinge axis. It should be noted that the position of the discharge valve 33 in phantom in fig. 5 is in its open state.

The key point of the above scheme lies in the shape of the discharge port 34 of the silo 30, the shape of the valve plate 331 and the matching structure between the two, that is, the circular arc surface plate surface of the valve plate 331 and the mouth edge profile of the circular arc edge 3211 of the second plate 32 are arranged adjacently, so a gap with a proper distance is also kept between the straight edge 311 of the first plate 31 and the circular arc surface plate surface of the valve plate 331, the side arm plate 332 applies a pulling force to the circular arc surface plate edge of the valve plate 331 to overcome the gravity applied by the material, and in the closed state, the material cannot leak out through the gap, so that the reliability of closing the discharge port of the silo 30 is ensured, which provides guarantee for the static state of the material of the conveyor belt 21 on the metering and conveying unit A, B, thereby ensuring the realization of static metering.

When the discharging valve 33 is opened, in order to eliminate the falling flow change of the materials in the bin 30 through the discharging port 34 in a very short time, the uniformity of the distribution of the materials on the conveying belt 21 can be ensured, the following preferable scheme is selected, namely, the partition plate 322 is arranged at the inner side plate edge of the second plate 32 which is oppositely arranged at the discharging port 34 of the bin 30, the partition plate 322 divides the discharging port into two discharging ports 34, two arc-shaped edges 3211 are symmetrically arranged at two sides taking the partition plate 322 as a boundary, and the discharging valve 33 is correspondingly arranged at two sides taking the partition plate 322 as a boundary.

The scheme has the remarkable advantages that firstly, the stable shape of the discharge hole of the bin 30 is ensured, the deformation is reduced, and the matching state of the discharge hole and the discharge valve 33 is maintained; secondly, the discharge hole of the bin 30 is arranged into two areas, two valve plates 331 can be correspondingly arranged, and when the two valve plates are opened or closed simultaneously, the response of blanking or stopping blanking is quick, so that the phenomenon of lack of uniformity of material arrangement is reduced; the swing of the two valve plates 331 when opening is divided into two opposite directions, so the stress of each valve plate 331 is correspondingly reduced and the power driving mechanism is symmetrically and reasonably arranged; when two valve plates 331 are closed, two adjacent plate edges are closely adjacent to the lower surface of partition 322, so that the tightness of closing is ensured, namely, materials cannot leak outwards and upwards through gaps.

In order to ensure smooth blanking, the partition 322 includes an angle plate with an upward angle tip in cross section, and when the two discharge valves 33 are in a closed position, the adjacent edges of the two valve plates 331 are located at the downward opening of the partition 322. By the scheme, the blanking reliability is ensured, and the premise is provided for the reliability of material sealing when the valve plate 322 is closed. The partition 322 is made of angle steel, and the included angle is matched with the inclination angle of the first plate 31 on the corresponding side.

As a drive mechanism for valve plate 332. It includes motor 35, has drive mechanism between motor 35 and the side arm board 332. The power drives the side arm plate 332 connected to the valve plate 332 through a transmission mechanism, the member to be restrained is the side arm plate 332, and the side arm plate 332 moves in an oscillating motion to realize opening and closing of the valve plate 332.

The specific transmission mechanism is that the rotating shaft of the motor 35 is arranged in parallel with the curvature shaft core and is connected with the rotary disc 36, one end of the connecting rod 37 is hinged at the lower corner of the outer side of the side arm plate 332, and the other end of the connecting rod 37 is hinged at the position of the rotary disc 36 close to the disc edge. The transmission mechanism is simple and reliable.

Claims (15)

1. A continuous conveying system for static metering materials is characterized by comprising a bidirectional conveying belt (10) connected below the discharge end of a discharge conveying belt in an articulating manner, wherein a metering conveying unit A and a metering conveying unit B are respectively connected below two ends of the bidirectional conveying belt (10) in an articulating manner; the metering and conveying units A, B each comprise a truss (20), a weighing and metering sensor (40) is arranged between the truss (20) and the rack, and a conveying belt (21) is arranged on the truss (20).

2. The continuous conveying system for statically metered materials according to claim 1, characterized in that a transfer belt (60) is connected below the discharge end of the conveyor belt (21).

3. The continuous conveying system for the static metered materials is characterized in that weighing and metering sensors (40) are arranged at two ends of the truss (20).

4. The continuous conveying system for the static metered materials as claimed in claim 1 or 3, wherein the two ends of the truss (20) are provided with weighing and metering sensors (40) and one end is symmetrically provided with two weighing and metering sensors.

5. The continuous conveying system for the static metered materials according to claim 1 or 2, characterized in that the conveying belt (21) is arranged in a sloping manner with one end high and the other end low and the high end is a discharge end, and the weighing and metering sensor (40) is arranged at the same height position at the bottom of the truss (20).

6. The continuous conveying system for the static metered materials according to claim 5 is characterized in that a buffer bin (50) is arranged between the discharge end of the conveying belt (21) and the receiving position of the transfer belt (60) below.

7. The continuous conveying system for the static metering materials of the claim 1, the 2 or the 3 is characterized in that the metering conveying units A, B all comprise a bin (30) positioned at the upper part, the lower end discharge port of the bin (30) is connected with the material receiving part of the conveying belt (21), and the lower end discharge port of the bin (30) is provided with a discharge valve (33).

8. The continuous conveying system for the static metered materials of claim 5, wherein the metering and conveying units A, B each comprise a bin (30) located at the upper part, and the lower end discharge port of the bin (30) is connected with the lower end receiving part of the conveying belt (21).

9. The continuous static metered material conveying system of claim 6, wherein: the discharge ports at the lower end of the storage bin (30) are formed by the areas surrounded by the plate edges of four enclosing plates which are arranged in pairs in an opposite way, one pair of the first plates (31) is provided with straight edges (311) at the lower plate edges which are arranged oppositely, the other pair of the second plates (32) is provided with arc-shaped edges (321) at the lower plate edges which are arranged oppositely, the curvature axis core of the arc-shaped edges (321) is positioned above the arc-shaped edges, the discharge valve (33) comprises a valve plate (331) with a circular arc surface and an upward extending side arm plate (332) connected with the arc-shaped edges of the valve plate (331), the valve plate (331) is overlapped with the curvature axis core of the arc-shaped edges (321), the upper end of the side arm plate (332) is hinged with the storage bin (30) at the curvature axis core, and the discharge port is closed or opened by the upper plate surface of the valve plate (331) moving along the arc-shaped edges (321) when the valve plate (331) swings around the hinged axis core.

10. The continuous conveying system for the static metered materials according to claim 9 is characterized in that a partition plate (322) is arranged at the edge of the inner side plate of the second plate (32) which is arranged oppositely, the partition plate (322) divides the discharge port into two discharge ports (34), two sections of circular arc-shaped edges (321) are symmetrically arranged at two sides with the partition plate (322) as a boundary, and discharge valves (33) are correspondingly arranged at two sides with the partition plate (322) as a boundary.

11. The continuous conveying system for the static metered materials as claimed in claim 10, characterized in that the partition (322) comprises an angle plate with a section with an angle point upward, and when the two discharge valves (33) are in a closed position, two adjacent edges of the valve plate (331) are positioned at a downward opening of the partition (322).

12. The continuous static material metering system of claim 9, wherein the drive mechanism includes a motor (35), and a transmission mechanism is provided between the motor (35) and the side arm plate (332).

13. The continuous conveying system for the static metered materials according to claim 9 is characterized in that a rotating shaft of the motor (35) is arranged in parallel with a curvature shaft core and is connected with the rotary table (36), one end of the connecting rod (37) is hinged at the lower corner of the outer side of the side arm plate (332), and the other end of the connecting rod (37) is hinged at the position, close to the disc edge, of the rotary table (36).

14. The continuous conveying system for the static metered materials as claimed in claim 5, characterized in that the included angle alpha between the conveying belt (21) and the horizontal direction is 2-8 degrees.

15. The continuous conveying system for the static metered materials as claimed in claim 14, wherein the included angle alpha between the conveying belt (21) and the horizontal direction is 3-5 degrees.

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