CN218271002U - Weighing and metering device - Google Patents

Abstract

The utility model relates to a storage equipment technical field, the utility model aims to provide a weighing and metering device to solve the technical problem that metering device measuring error among the prior art is great, measurement accuracy is lower. The weighing and metering device comprises a frame body, wherein a feed hopper and weighing hoppers positioned below the feed hopper are arranged on the frame body, at least two weighing hoppers are arranged on the frame body, each weighing hopper is provided with a weighing measuring component and a discharge valve, the weighing measuring components comprise weighing sensors arranged outside the weighing hoppers, the discharge valves are arranged at discharge ports at the lower ends of the weighing hoppers, the discharge valves are used for plugging or opening openings at the lower ends of the weighing hoppers, and the weighing sensors are used for weighing the weighing hoppers after materials are stacked; still be equipped with on the support body and be arranged in switching and leading the switching piece to the different hoppers of weighing of the material in the hopper.

Description

A weighing and measuring device

technical field

The utility model relates to the technical field of storage equipment, in particular to a weighing and measuring device.

Background technique

In the process of grain storage and warehousing, the original way of warehousing is to manually bag or load the grain and measure the weight of the bagged or loaded grain. Then, according to the size of the warehouse, the corresponding tonnage of grain is selected and dumped into the warehouse. However, these original storage methods have seriously affected the efficiency and progress of grain storage due to poor accuracy and inconvenient weighing operations. big error.

With the continuous development of science and technology, weighing and measuring equipment is usually used in the production and packaging system of materials. The weighing and measuring equipment weighs the materials on the production line and outputs them. components such as scales or load cells for weighing. The weighing and measuring equipment can be connected to the production line and the conveyor belt, so as to quantitatively measure the weight of the materials on the production line in batches, so as to ensure the accurate output weight of the production line. For the storage and warehousing of grain, there are also supporting grain transportation production lines and weighing and measuring equipment applied to the grain transportation production line. During the transportation of grain on the production line, the grain is packed and weighed and then transported into the warehouse. It will greatly improve the accuracy and measurement accuracy of grain storage and warehousing, and can also improve the efficiency of grain warehousing. However, ordinary weighing and measuring equipment needs to measure and weigh the bagged or boxed materials before sending them out. Only when the next bag or box of material can be weighed, there is a process of pause during the process, the overall time-consuming is still long, and the efficiency is low.

The Chinese invention patent application with application publication number CN103616062A and application publication date of 2014.03.05 provides a grain weighing device, including a storage bin and a weighing bucket located below the storage bin. The discharge port corresponding to the heavy bucket, the left and right sides of the weighing bucket are equipped with circular side plates, the center is equipped with a rotating shaft, and the two ends of the rotating shaft are equipped with bearings, and the bottom of which is supported by a sensor. The sensor is used to measure the weight change of the hopper. . There are three baffles between the two side plates, and a distribution hopper is formed between two adjacent baffles and the side plates, and three ring-shaped and adjacently arranged distribution hopper structures are formed on the weighing bucket, called When the heavy bucket rotates along the rotating shaft, different sub-hoppers can be opposite to the discharge port, so that the sub-hoppers can carry out weighing while receiving the grain, and then the grain in the sub-hopper can be discharged with the rotation of the rotating shaft, so that the next adjacent The separate hopper continues to receive and weigh materials, which improves the efficiency of material weighing and discharging.

However, when the above-mentioned grain metering device is in use, since the distribution hopper and the storage bin are arranged at intervals up and down, during the process of discharging from the storage bin, the grain continues to fall in the distribution hopper, and then in the process of material accumulation, the material will The sub-hopper produces continuous impact force, and the downward impact force will have a greater impact on the measurement results during the weighing process of the sensor, which will cause a large error between the amount of the weighed material and the actual material, and affect the discharge of the material and bagging.

Utility model content

The purpose of the utility model is to provide a weighing and measuring device to solve the technical problems of relatively large measurement error and low measurement accuracy of the measuring device in the prior art.

In order to achieve the above purpose, the technical solution of a weighing and measuring device provided by the utility model is:

A weighing and metering device, comprising a frame body, on which a feed hopper and a weighing hopper located below the feed hopper are arranged, at least two weighing hoppers are arranged on the frame body, each weighing hopper All are equipped with a weighing and measuring component and a discharge valve. The weighing and measuring component includes a load cell located outside the weighing hopper, and the discharging valve is located at the outlet of the weighing hopper at the lower end. The opening of the lower end of the heavy hopper is blocked or opened, and the load cell is used to weigh the weighing hopper after the aggregated materials; Toggle piece in hopper.

Beneficial effects: Compared with the metering device in the prior art that continuously bears the impact force of the material, resulting in larger measurement error and lower measurement accuracy, the weighing metering device in the utility model is provided with more than two weighing hoppers, and then The switching piece and the weighing measurement assembly are arranged on the frame body, so that through the cooperation of the switching piece and the weighing measurement assembly, different weighing hoppers connected to the discharge hopper can be switched, and the discharge valve and the weighing sensor in the weighing measurement assembly can be switched. Synchronous cooperation realizes the closure and static weighing of the weighing hopper. The weighing hopper can carry out static weighing measurement without external force and subsequent material input, ensuring the accuracy of the measurement results without the interference of external impact forces. The feeding and weighing of each weighing hopper are continuously switched, which ensures the accuracy of each weighing measurement result without affecting the discharge efficiency, and effectively solves the large measurement error of the metering device in the prior art and the measurement accuracy. Lower technical issues.

Preferably, the switching member includes a bracket fixed on the frame body and a chute assembled on the bracket, and the switching member also includes a driving member arranged on the bracket and used to drive the chute to swing and change direction. Through the connection and arrangement of the frame, the chute and the driving parts, the material in the feed hopper can be transferred to different weighing hoppers by switching the orientation and inclination of the chute. The overall structure is simple and the connection and arrangement are convenient.

Preferably, two weighing hoppers are arranged at intervals on the left and right sides of the frame body, the bracket is arranged between the two weighing hoppers, the middle part of the chute is hinged on the bracket, and the driving part is arranged on the lower side of one end of the chute. The driving part can drive the chute to swing left and right along its middle hinge point. Static weighing and uninterrupted discharge can be realized through the two weighing hoppers arranged at intervals on the left and right. The chute on the bracket can be switched to the weighing hopper only by swinging left and right, and the control and drive of the chute are simpler.

Preferably, the driving part is an electric push rod, and the top end of the inner rod of the electric push rod is fixed on the bottom of the corresponding side of the chute. The electric push rod is a multi-stage drive rod, which can extend a long distance, which is convenient for switching the inclination angle of the chute. At the same time, the electronically controlled electric push rod is easy to control and responds quickly, and can quickly switch the inclination angle and orientation of the chute during operation.

Preferably, the discharge valve is a gate valve structure, including an electric push rod fixed on the frame body and a guide rail, and also includes a sealing plate guided and slidably assembled on the guide rail, and the electric push rod is used to drive the sealing plate to translate along the guide rail. To open or block the outlet of the weighing hopper. The electric push rod responds quickly, and can quickly extend or retract the sealing plate, ensuring the instantaneity and consistency of the cooperation between the discharge valve and the switching part.

Preferably, the weighing measurement assembly further includes a material level sensor arranged at the top of the weighing hopper, and the material level sensor is used for horizontally sensing the apex of the material accumulated in the weighing hopper, so that the material in the weighing hopper is accumulated to the material level. When the sensing height of the sensor is reached, a control command is issued to the switching member. When the material in the weighing hopper reaches the set height of the material level sensor and is sensed by the material level sensor, the material level sensor can quickly cooperate with the switch, respond quickly, control accurately, and prevent excessive accumulation of materials in the weighing hopper .

Preferably, the frame body is provided with a discharge hopper, the discharge hopper is arranged below the weighing hopper, and the discharge hopper has a feed port corresponding to the discharge port of each weighing hopper, so as to weigh the material in the weighing hopper gather. The material in each weighing hopper is guided and gathered through the discharge hopper to facilitate the subsequent discharge of the weighing and measuring device, and it can also be bagged or connected to subsequent conveying equipment through the discharge hopper to facilitate discharge.

Preferably, an elevated frame is provided under the frame body, and the elevated frame is used to raise the discharge port of the discharge hopper to facilitate material receiving and discharging. The elevated frame raises all the components on the frame by a certain distance, which is conducive to the rapid discharge of the material, and prevents the discharge port from being too low to be difficult to pack or connect to subsequent equipment.

Preferably, the bottom of the frame body is provided with running wheels. The weighing and measuring device can be set at any position through the walking wheels at the bottom of the frame, which is convenient for movement and position adjustment, and is beneficial for feeding and weighing.

Preferably, the outer periphery of the feed inlet of the weighing hopper is provided with an upwardly extending shroud, and the top of the shroud surrounds the switching member in the middle. The hoarding prevents materials from spilling outwards, improving safety.

Description of drawings

Fig. 1 is the structural representation of weighing and measuring device in embodiment 1 provided by the utility model;

Fig. 2 is the rear view of the weighing and measuring device in Fig. 1;

Fig. 3 is a left side view of the weighing and measuring device in Fig. 1 .

Explanation of reference signs:

1. Frame body; 2. Support column; 3. Connecting column; 4. Inlet hopper; 5. Outlet hopper; 6. Weighing hopper; 7. Chute; 8. Hinged column; 9. Fixed plate; 10. Electric push Rod; 11, discharge valve; 12, sealing plate; 13, sensor fixing seat; 14, weighing sensor; 15, material level sensor; 16, fixed column; ; 20, walking wheel; 21, discharge pipe.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not intended to limit the present utility model, that is, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that possible terms such as "first" and "second" and other relative terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, terms such as "comprises," "comprising," or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also includes elements not expressly listed. Other elements mentioned above, or also include elements inherent in such process, method, article or equipment. Without further limitations, elements defined by the phrase "comprising a..." etc. do not preclude processes, methods including said elements.

In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; may be mechanically connected, may also be electrically connected; may be directly connected, may also be indirectly connected through an intermediary, or may be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "has" that may appear should be understood in a broad sense, for example, the object of "has" can be a part of the body, or It can be arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Below in conjunction with embodiment the utility model is described in further detail.

Specific embodiment 1 of the weighing measuring device provided by the utility model:

As shown in Figures 1 to 3, the weighing and measuring device in this embodiment extends up and down, including a frame body 1 and a feed hopper 4, a weighing hopper 6, and a hopper 5 arranged at the upper end of the frame body 1, wherein, Two weighing hoppers 6 are arranged at intervals on the left and right sides of the frame body 1, and the weighing and measuring components and the discharge valve 11 are integrated on the two weighing hoppers 6, and a switch is provided between the two weighing hoppers 6. The switch can make the outlet of the feed hopper 4 communicate with one of the weighing hoppers 6, cooperate with the discharge valve 11 and the weighing measurement component to collect and weigh the materials of the weighing hopper 6, and then switch to another weighing hopper The hopper 6 collects and weighs materials, so that the two weighing hoppers 6 can run continuously, ensuring the discharge efficiency and realizing accurate static weighing.

As shown in Figures 1 to 3, the frame body 1 of the weighing and measuring device in this embodiment is a rectangular frame structure, and the frame body 1 includes four support columns 2 that extend vertically and surround a rectangle. The space is fixed by a plurality of connecting columns 3 extending horizontally. Wherein, the feeding hopper 4 is welded on the connecting column 3 at the top of the rectangular frame, its feeding port faces upwards, and the discharging port faces downwards, and two weighing hoppers 6 are arranged and fixed at intervals on the connecting column 3 below the feeding hopper 4 , the discharge hopper 5 is fixed below the weighing hopper 6 through the connecting column 3, the upper end feed port of the discharge hopper 5 corresponds to the bottom discharge ports of the two weighing hoppers 6, and the feed hopper 4 and the weighing hopper are connected through the frame body 1. The heavy hopper 6 and the discharge hopper 5 are arranged sequentially from top to bottom.

As shown in FIGS. 1 to 3 , the switching member includes a bracket arranged between two weighing hoppers 6 , a chute 7 arranged on the bracket, and a driving member arranged below the chute 7 to drive the chute 7 to swing. Specifically, the support includes a fixed column 16 fixed above the feed inlets of the two weighing hoppers 6 and extending forward and backward. A fixed plate 9 is provided, and the chute 7 is an arc-shaped plate structure extending left and right. The front and rear sides of the middle part of the chute 7 are respectively hinged with two hinge columns 8, so that the chute 7 can swing left and right with the top of the hinge column 8 as the hinge point. . The right side of fixed plate 9 is fixed with driver, and the driver in the present embodiment is electric push rod 10, and the front end of electric push rod 10 internal telescoping rod is fixed on the bottom of chute 7 right sides, and the bottom of electric push rod 10 outer bar End is fixed on the right side of fixed plate 9. When the inner rod of the electric push rod 10 is retracted, the right end of the chute 7 can be pulled to tilt downward, and the material in the feed hopper 4 can fall into the weighing hopper 6 on the right side through the chute 7. When the electric push rod 10 Start when its inner rod is stretched out, the right-hand side of chute 7 lifts, and the left end is inclined downward, and the material in the feed hopper 4 can fall in the weighing hopper 6 of left side by chute 7 now.

As shown in Figure 1 and Figure 2, two "I" shaped reinforcing columns 17 extending forward and backward are fixed on the connecting column 3 below the weighing hopper 6, and the weighing and measuring components include sensor fixing seats arranged on the reinforcing columns 17 13 and the load cell 14 located on the sensor holder 13, the outer circumference of the two weighing hoppers 6 is respectively provided with a load cell 14. After one of the weighing hoppers 6 falls into the material, the direction of the chute 7 is switched, and the other weighing hopper 6 starts receiving materials, and the load cell 14 outside the previous weighing hopper 6 can perform static weighing in real time, thereby accurately measuring Fall into the weight of material at every turn in weighing hopper 6. Wherein, the weighing measurement component also includes a discharge valve 11 arranged at the discharge port at the lower end of the weighing hopper 6. The discharge valve 11 is a gate valve structure, and the discharge valve 11 includes a valve fixed on the connecting column 3 below the weighing hopper 6. The electric push rod and the guide rail also include a sealing plate 12 that is guided and slidably assembled on the guide rail. The electric push rod is used to drive the sealing plate 12 to translate along the guide rail to block the discharge port of the weighing hopper 6 or keep it away from the discharge hopper 5 Make the outlet open.

In order to prevent the material in the feed hopper 4 from spilling outwards during the process of pouring into the chute 7, as shown in Figure 1, the outer periphery of the top of the weighing hopper 6 is also provided with a vertically extending hoarding 18, and the hoarding 18 will The top of the weighing hopper 6 is closed to ensure that the materials on the chute 7 can all fall into the weighing hopper 6 . Wherein, the weighing measurement assembly also includes a material level sensor 15 arranged on the side wall of the coaming plate 18. When the material accumulated in the weighing hopper 6 rises to the same height as the material level sensor 15, the material sensor can Sensing the top of the material, the material sensor can send a signal to the electric push rod 10 to switch the attitude of the chute 7, so that another weighing hopper 6 can collect the material. In other embodiments, the shroud may be eliminated.

As shown in Figures 1 to 3, a bent S-shaped discharge pipe 21 is also provided on the discharge port at the bottom of the discharge hopper 5, and the discharge pipe 21 is used for docking the receiving equipment or bagging, wherein, for the convenience of discharging Feeding tube 21 feeds in and out of the material, and the bottom of the frame body 1 is also provided with a heightening frame 19, and the bottom of the frame body 19 is provided with a walking wheel 20 capable of moving forward and backward, and the frame body 1 is raised as a whole by the heightening frame 19, which is beneficial to the discharging. , The traveling wheel 20 can make the weighing measuring device quickly move to the weighing position.

In this embodiment, the operation process of the weighing and measuring device is as follows: in the state where no material is initially input, the outlets at the bottom of the two weighing hoppers 6 are opened, and the weighing and measuring device is pushed and fixed by the walking wheels 20, so that the weighing and measuring device is fixed. The weight metering device starts to work at the designated operating position, first start the discharge valve 11 under the weighing hopper 6 on the right side, so that the sealing plate 12 blocks the weighing hopper 6 on the right side, and then control the inner rod of the electric push rod 10 Retract, pull the right end of the chute 7 to tilt downward, the material in the feed hopper 4 will fall into the weighing hopper 6 on the right after being guided by the chute 7 and start to gather until the material gathers until it is sensed by the material level sensor 15 on the right At the same time, control and start the discharge valve 11 at the bottom of the weighing hopper 6 on the left, so that the sealing plate 12 will block the discharge port at the bottom of the weighing hopper 6 on the left, and at the same time control the inner rod of the electric push rod 10 to stretch out to push the chute 7. The right end rises. At this time, the weighing hopper 6 on the left begins to gather materials, while the weighing hopper 6 on the right and the materials in it stand still, and the weighing sensor 14 on the outer periphery of the weighing hopper 6 on the right is used for static weighing. After the weighing is completed and recorded, control the discharge valve 11 on the right to keep the sealing plate 12 away from the discharge port of the weighing hopper 6, and the weighing hopper 6 on the right starts to discharge, and the weighing hopper on the left during discharge The heavy hopper 6 continues to receive materials, and then the material accumulation and weighing on the left side and the next weighing of materials in the right weighing hopper 6 are the same as the above process. The two weighing hoppers 6 and the weighing and measuring components cycle alternately for material acceptance , Weighing and discharge, to achieve uninterrupted discharge of materials and accurate static weighing.

In this embodiment, through continuous test and verification, when the material level sensor 15 is set at a height of about 10 cm upward from the bottom of the coaming plate 18, the material on one of the weighing hoppers 6 is discharged and the sealing plate 12 will discharge the material from the bottom of the weighing hopper 6. When the feed port is blocked, the height of the material in the other weighing hopper 6 just reaches the sensing height position of the material level sensor 15, thus realizing the seamless switching of the two weighing hoppers 6, ensuring the discharge efficiency and the continuity of discharge . Of course, in other embodiments, the setting height of the material level sensor can also be changed, and the time interval between the switching of the two weighing hoppers is relatively short, which will not affect the discharge efficiency.

The electric push rod 10 in the present embodiment is arranged on the right side of the fixed plate 9, and when the electric push rod 10 starts, the right end of the push chute 7 rises, of course, in other embodiments, the electric push rod 10 can also be arranged on the On the left side of the fixed plate 9, the starting sequence of the electric push rod 10 and the matching starting sequence of the discharge valve 11 at this time are opposite to those in this embodiment.

Compared with the metering device in the prior art that continuously bears the impact force of the material so that the measurement error is large and the measurement accuracy is low, the weighing metering device in this embodiment is provided with two weighing hoppers 6 arranged at intervals, Then set the switch on the frame body 1, so that through the cooperation of the chute 7, the electric push rod 10 and the weighing and measuring components in the switch, the different weighing hoppers 6 are connected to the discharge hopper 5 in real time. 11 and the load cell 14 synchronously cooperate to realize the closure and static weighing of the weighing hopper 6, and the weighing hopper 6 can carry out static weighing measurement without external force and no subsequent material input, ensuring the accuracy of the measurement results No external impact interference, the two weighing hoppers 6 continuously switch between feeding and weighing, ensuring the accuracy of each weighing measurement result without affecting the output efficiency, effectively solving the problem in the prior art The measurement error of the metering device is relatively large and the measurement accuracy is low.

Specific embodiment 2 of the weighing measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, there are two weighing hoppers 6 on the frame body 1 arranged at intervals from left to right. In this embodiment, there are three weighing hoppers arranged at intervals. At this time, the chute in the switching member is rotatably assembled on the frame body, and through the rotation of the chute, different weighing hoppers are switched to communicate with the feeding hopper. In other embodiments, there may be more than three weighing hoppers.

Specific embodiment 3 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, the driving member used to drive the swing of the chute 7 in the switching member is an electric push rod 10 . In this embodiment, the driving member is an oil cylinder. In other embodiments, the driving member may also be an air cylinder.

Specific embodiment 4 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that, in Embodiment 1, the switching member is a matching structure of the hinged chute 7 on the bracket. In this embodiment, the switching member is a sub-hopper fixedly arranged below the feed hopper. The bottom of the sub-hopper is provided with a discharge port connected to different weighing hoppers and a valve for opening or closing the discharge port. By switching the sub-hopper Different outlets are opened or closed, so that the feed hopper communicates with different weighing hoppers. In other embodiments, the structural form of the switching member can also be changed, for example, a distributing tray in the form of a turntable or a distributing box assembled by rotation is provided, as long as the purpose of being able to switch between different weighing hoppers and feeding hoppers is met.

Specific embodiment 5 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, the discharge valve 11 is a gate valve structure, including an electric push rod and a guide rail fixed on the frame body 1, and also includes a sealing plate 12 that is guided and slidably assembled on the guide rail . In this embodiment, the discharge valve is an air valve. In other embodiments, the discharge valve can also be an oil valve.

Specific embodiment 6 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, the weighing measurement assembly includes a material level sensor 15 arranged at the top of the weighing hopper 6 . In this embodiment, the material level sensor is cancelled, and the control of the electric push rod and the discharge valve are switched at regular intervals. Heavy hopper for material accumulation.

Specific embodiment 7 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, a discharge hopper 5 is provided on the frame body 1 . In this embodiment, the discharge hopper is canceled, and when the discharge valve at the lower end of the weighing hopper is opened, the bagging operation is performed directly, or a conveying production line is arranged under the weighing hopper to directly output the weighed materials.

Specific embodiment 8 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, the bottom of the frame body 1 is provided with running wheels 20 . In this embodiment, the traveling wheels are cancelled, and the weighing measuring device is fixed at a designated weighing position.

Specific embodiment 9 of the weighing and measuring device provided by the utility model:

The difference from Embodiment 1 is that in Embodiment 1, the load cell 14 is a fixed sensor fixed on the outer periphery of the weighing hopper through the sensor fixing base 13 . In this embodiment, the weighing hopper is suspended on the frame body, and the weighing sensor is set at the hanging position of the weighing hopper or on the hanging rope, and the weighing sensor at this time is a tension sensor.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, It is still possible to modify the technical solutions described in the foregoing embodiments without creative effort, or to perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. The weighing and metering device comprises a frame body (1), wherein the frame body (1) is provided with a feed hopper (4) and weighing hoppers (6) positioned below the feed hopper (4), the weighing hoppers (6) are at least two on the frame body (1), each weighing hopper (6) is provided with a weighing measuring component and a discharge valve (11), the weighing measuring components comprise weighing sensors (14) arranged outside the weighing hoppers (6), the discharge valves (11) are arranged at discharge ports at the lower ends of the weighing hoppers (6), the discharge valves (11) are used for plugging or opening the lower end openings of the weighing hoppers (6), and the weighing sensors (14) are used for weighing the weighing hoppers (6) after materials are gathered; the frame body (1) is also provided with a switching piece for switching and guiding materials in the discharging hopper (5) to different weighing hoppers (6).

2. Weighing and metering device according to claim 1, characterised in that the switching member comprises a bracket fixed to the frame body (1) and a chute (7) fitted to the bracket, the switching member further comprising a drive member provided on the bracket for driving the chute (7) to oscillate and reverse.

3. The weighing and metering device according to claim 2, wherein the weighing hoppers (6) are arranged on the frame body (1) in a left-right spaced manner, the frame is arranged between the weighing hoppers (6), the middle part of the chute (7) is hinged on the frame, the driving part is arranged at the lower side of one end of the chute (7), and the driving part can drive the chute (7) to swing left and right along the hinged point at the middle part of the chute.

4. A weighing and metering device according to claim 3, characterised in that the drive member is an electric push rod (10), the top end of the inner rod of the electric push rod (10) being fixed to the bottom of the corresponding side of the chute (7).

5. A weighing and metering device according to any one of claims 1-4, wherein the discharge valve (11) is of a gate valve structure and comprises an electric push rod and a guide rail which are fixedly arranged on the frame body (1), and further comprises a sealing plate (12) which is guided and slidably assembled on the guide rail, wherein the electric push rod is used for driving the sealing plate (12) to translate along the guide rail so as to open or close the discharge hole of the weighing hopper (6).

6. The weigh measuring device of any one of claims 1 to 4, wherein the weigh measuring assembly further comprises a level sensor (15) disposed at a top end of the weigh hopper (6), the level sensor (15) being configured to sense a top of the material accumulated in the weigh hopper (6) horizontally to issue a control command to the switch when material in the weigh hopper (6) accumulates to a sensing height of the level sensor (15).

7. The weighing and metering device according to any one of claims 1-4, wherein a discharge hopper (5) is arranged on the frame body (1), the discharge hopper (5) is arranged below the weighing hoppers (6), and the discharge hopper (5) is provided with a feed inlet corresponding to the discharge port of each weighing hopper (6) so as to gather materials in the weighing hoppers (6).

8. The weighing and metering device according to claim 7, wherein a heightening frame (19) is arranged below the frame body (1), and the heightening frame (19) is used for lifting the discharge hole of the discharge hopper (5) so as to conveniently receive and discharge materials.

9. Weighing and metering device according to any one of claims 1-4, characterised in that the bottom of the frame body (1) is provided with travelling wheels (20).

10. Weighing and metering device according to any one of claims 1-4, characterized in that the periphery of the feed opening of the weighing hopper (6) is provided with an upwardly extending apron (18), the top end of the apron (18) enclosing the switch in the middle.

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