Closed circulation automatic batching system

Abstract

The utility model discloses a closed circulating automatic batching system which comprises a closed circulating conveying system and a charging platform, wherein the closed circulating conveying system consists of an automatic charging basket conveying line and a charging metering conveying line; the charging platform is arranged above the charging metering conveying line in an overhead manner; a chain type conveying mechanism is arranged on the feeding metering conveying line and comprises a chain conveying rack, a batching platform arranged on the upper portion of the chain conveying rack in the longitudinal direction of the feeding metering conveying line, and a chain conveying assembly installed on the chain conveying rack and used for enabling a material barrel to move in the longitudinal direction of the batching platform. An empty material barrel weighing station, a plurality of material distribution stations and a full material barrel weighing station are sequentially arranged on the material distribution platform at intervals in the longitudinal direction, and lifting type weighing mechanisms are arranged on the empty material barrel weighing station, the plurality of material distribution stations and the full material barrel weighing station respectively; a plurality of feeding devices are arranged on the feeding platform, and each feeding device is positioned right above each batching station. According to the utility model, the production efficiency of batching operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic batching, in particular to a closed-loop automatic batching system. Background Art

[0002] In many industries such as pharmaceuticals, chemicals, and military industries, it is often necessary to batch multiple different types of granular materials or powder materials. After various materials are metered and proportioned, they are loaded into the same bucket for use in the production line. After passing through several production processes in the production line, the batched materials can be made into the required intermediate raw materials or products.

[0003] For conventional multi-material batching methods, manual batching or an artificial batching assistance method mainly based on semi-automatic machine batching is usually adopted. The equipment used for batching is a metering feeder, and each type of material is equipped with a corresponding metering feeder. During batching, a measuring cup is grabbed by a human or a manipulator and placed on the metering feeder for metering and taking the material. After each material is taken, it is poured into a bucket with a bag to form a mixed material containing multiple materials. The batched mixed material is then sent to the production line for making the mixed material into the required intermediate raw materials or products.

[0004] The above methods of manual or semi-automatic batching have the following disadvantages: the production efficiency is relatively low; in addition, for some pharmaceutical or chemical materials, manual batching or manual-assisted batching will have an adverse impact on the health of the operators of the batching operation. Moreover, manual batching or manual-assisted batching also increases the labor cost.

[0005] Therefore, it is necessary to develop a multi-material automatic batching system that can achieve full-automatic batching to solve the above deficiencies. Summary of the Utility Model

[0006] In order to solve the above problems, the utility model proposes a closed-loop automatic batching system, aiming to achieve automatic batching of multiple materials, improve the production efficiency of the batching operation, and reduce the production cost of the batching operation. The specific technical solutions are as follows:

[0007] A closed-loop automatic batching system includes a closed-loop conveying system formed by the head-to-tail docking of a bucket automatic conveying line and a feeding and metering conveying line, and a feeding system that is matched with the closed-loop conveying system. The feeding system includes a feeding platform that is overhead-mounted above the feeding and metering conveying line through a feeding rack. A chain-type conveying mechanism is arranged on the feeding and metering conveying line. The chain-type conveying mechanism includes a chain conveying rack, a batching platform longitudinally arranged on the upper part of the chain conveying rack along the feeding and metering conveying line, and a chain conveying component installed on the chain conveying rack for moving the bucket longitudinally along the batching platform. On the batching platform, an empty bucket weighing station, a plurality of batching stations, and a full bucket weighing station are sequentially arranged at intervals along the longitudinal direction according to the batching process, and lifting weighing mechanisms are respectively arranged on the empty bucket weighing station, the plurality of batching stations, and the full bucket weighing station. A plurality of feeding devices are arranged at intervals along the longitudinal direction on the feeding platform, and each feeding device is correspondingly located directly above each batching station.

[0008] In the present utility model, the feeding device includes a storage tank fixed on the feeding platform, a screw feeder connected to the lower discharge port of the storage tank, and a feeding pipe arranged on the screw feeder.

[0009] Preferably, each feeding pipe on the feeding platform is exactly located directly above each batching station.

[0010] The closed-loop automatic batching system of the present utility model is further provided with a feeding station for supplying materials to the storage tank. The top of the storage tank is connected with a closed negative-pressure suction bin through an electric valve, and the closed negative-pressure suction bin is connected to the feeding station through a suction pipeline.

[0011] In the present utility model, a level gauge is arranged on the storage tank.

[0012] Preferably, one feeding station is provided for each set of feeding devices.

[0013] In the present utility model, a bag filter is arranged on the top of the closed negative-pressure suction bin, and the bag filter is connected to a negative-pressure fan through a negative-pressure pipeline.

[0014] When the dust collector on the top of the bin is working, the negative pressure fan generates negative pressure in the enclosed negative pressure material suction bin through the dust collector on the top of the bin. The material suction pipeline connected between the feeding station and the enclosed negative pressure material suction bin sucks the materials in the feeding station into the enclosed negative pressure material suction bin. The filter on the dust collector on the top of the bin filters and removes dust to prevent the materials from being discharged outside through the negative pressure fan. After the enclosed negative pressure material suction bin is full of materials, the material suction valve used to connect the dust collector on the top of the bin is closed, and then the electric valve located between the enclosed negative pressure material suction bin and the storage tank is opened to transfer the materials in the enclosed negative pressure material suction bin to the storage tank. The storage capacity of the enclosed negative pressure material suction bin is relatively less than that of the storage tank. The materials in the enclosed negative pressure material suction bin can be transferred to the storage tank in batches until the storage tank is full of materials.

[0015] In the present utility model, the automatic bucket conveying line includes an automatic bucket conveying machine frame and a bucket automatic conveying roller shaft assembly arranged on the upper part of the automatic bucket conveying machine frame; the bucket automatic conveying roller shaft assembly includes a plurality of roller shafts arranged at intervals and rotatably arranged on the automatic bucket conveying machine frame.

[0016] In the present utility model, the chain conveying assembly includes four first sprockets respectively arranged at the four corner positions on the longitudinal one side of the chain conveying machine frame, four second sprockets respectively arranged at the four corner positions on the longitudinal other side of the chain conveying machine frame, a first closed conveying chain wound around and connected to the four first sprockets, a second closed conveying chain wound around and connected to the four second sprockets, and a plurality of transverse baffle elements arranged at intervals and transversely connected between the first closed conveying chain and the second closed conveying chain; wherein, the upper parts of the first closed conveying chain and the second closed conveying chain are located at the upper two side positions of the batching platform, and a bucket placing space for placing the bucket on the batching platform is formed between adjacent transverse baffle elements.

[0017] Preferably, each of the transverse baffle elements includes a pair of chain transverse connecting rods arranged close to each other.

[0018] As a further improvement of the present utility model, a transition pushing and positioning mechanism is arranged at the position between the front part of the automatic bucket conveying line and the empty bucket weighing and working position of the feeding and metering conveying line. The transition pushing and positioning mechanism includes a pushing and positioning cylinder, a thrust block arranged at the front end of the piston rod of the pushing and positioning cylinder, a column erected upward on the upper part of the thrust block, and a swing plate rotatably arranged at the upper end part of the column through a hinge shaft. A gravity type stop block is arranged on the lower end surface of the rear part of the swing plate. The swing plate swings around the hinge shaft to lift its front end upward by the swing torque generated by the gravity of the gravity type stop block, and after the front end of the swing plate is lifted upward, the gravity type stop block abuts against the rear side surface of the column.

[0019] In the present utility model, the lifting weighing mechanism includes a base plate fixed on the chain conveyor frame and located below the batching platform, a lifting weighing cylinder fixed on the base plate, a lifting plate arranged above the base plate and connected to the piston rod of the lifting weighing cylinder, a weighing sensor assembly arranged on the upper end surface of the lifting plate, and a barrel weighing support plate connected to the upper part of the weighing sensor assembly; a plurality of guiding shafts are vertically arranged downward around the periphery of the lifting weighing cylinder on the lower end surface of the lifting plate, and a plurality of guiding holes are correspondingly arranged on the base plate, and the guiding shafts are slidably connected with the guiding holes in a sliding manner; a metering and weighing window is formed on the batching platform for the upper part of the lifting weighing mechanism to move up and down through.

[0020] Among them, the lifting weighing mechanism is installed at a position below the metering and weighing window.

[0021] In the present utility model, a lifting conveying mechanism is further arranged at the rear of the automatic barrel conveying line and is located below the automatic barrel conveying roller shaft assembly. The lifting conveying mechanism includes a lifting assembly, a pair of inserting plates vertically arranged on the upper part of the lifting assembly, and a pair of conveyor belt assemblies respectively arranged on the sides of the pair of inserting plates. Each conveyor belt assembly includes a closed conveyor belt, a driving wheel and a driven wheel respectively connected to both ends of the closed conveyor belt, and a plurality of support guide wheels arranged at intervals and abutted against the inner side of the closed conveyor belt between the driving wheel and the driven wheel. The closed conveyor belt is horizontally arranged, and the upper conveying surface of the horizontally arranged closed conveyor belt is higher than the upper end surface of the inserting plate. Moreover, a downward extending turning section is arranged at one end of the horizontally arranged closed conveyor belt. The driving wheel is connected to one end of the downward turning section of the closed conveyor belt, and the driven wheel is connected to the other end of the closed conveyor belt. A deflecting wheel for realizing the turning of the closed conveyor belt is also abutted against the corner of the turning of the closed conveyor belt. The driving wheel, the driven wheel, the support guide wheels and the deflecting wheel are respectively rotatably arranged on the inserting plate; a lifting conveying driving motor is further installed between the pair of inserting plates, and the pair of driving wheels corresponding to the pair of conveyor belt assemblies are respectively connected to the output shaft of the lifting conveying driving motor.

[0022] Preferably, a row of spare mounting holes for the feeding device are further arranged at intervals longitudinally on the feeding platform, and the row of spare mounting holes for the feeding device are arranged adjacent to and offset from a plurality of feeding devices on the feeding platform.

[0023] Preferably, a barrel bag placing station and a barrel bag taking station are also provided in a supporting manner on the automatic barrel conveying line, which are respectively used for placing bags for empty barrels and taking bags after batching.

[0024] When the automatic batching system is working, the materials from the feeding station are sucked into the enclosed negative-pressure suction bin through the suction pipeline, and then the materials in the enclosed negative-pressure suction bin are transferred to the storage tank by opening the electric valve; during the batching process, the transition pushing and positioning mechanism transports the empty barrels with empty bags at the front of the barrel automatic conveyor line to the empty barrel weighing station on the feeding and metering conveyor line. The lifting weighing mechanism at this station first weighs and measures the empty barrel, and then sends it to the subsequent batching station. The screw feeder on the feeding device gradually adds the materials into the barrel, and the lifting weighing mechanism below weighs and measures (weight gain measurement). After reaching the set feeding amount, the feeding stops, thus completing the batching of one kind of material. After successively completing the batching of several kinds of materials, the barrel is moved to the full barrel weighing station, and the lifting weighing mechanism at this station weighs and measures the total weight of the barrel after batching for review; after the barrel is weighed and measured for review, it is transported from the feeding and metering conveyor line to the rear of the barrel automatic conveyor line, and successively reaches the barrel bag-taking station and the barrel bag-placing station of the barrel automatic conveyor line; at the barrel bag-taking station, the barrel bag-taking manipulator takes away the bag filled with the batching in the barrel; the barrel without the bag is moved to the barrel bag-placing station of the barrel automatic conveyor line, and the barrel bag-placing manipulator places the empty bag into the barrel. Subsequently, the barrel with the empty bag returns to the front of the barrel automatic conveyor line, and then is transported to the empty barrel weighing station on the feeding and metering conveyor line again. In this way, the automatic cyclic batching of multiple materials is realized. The barrels with the total weight not meeting the requirements after batching are laterally removed and transferred outside the barrel automatic conveyor line through the lifting conveyor mechanism.

[0025] The beneficial effects of the present utility model are as follows:

[0026] First, for the closed-loop automatic batching system of the present utility model, a closed-loop conveying system is formed by the head-to-tail docking of the barrel automatic conveyor line and the feeding and metering conveyor line, and the feeding platform is erected above the feeding and metering conveyor line, realizing the automatic batching of multiple materials, improving the production efficiency of the batching operation, and reducing the production cost of the batching operation.

[0027] Second, for the closed-loop automatic batching system of the present utility model, when considering that the barrel is transported from the front of the barrel automatic conveyor line to the empty barrel weighing station on the feeding and metering conveyor line relying on its moving inertia, due to possible certain changes in the inertial force of the barrel, it may cause the barrel to fail to be accurately positioned at the batching station, thereby reducing the reliability of the multi-material automatic batching system. However, in the present utility model, the transition pushing and positioning mechanism realizes the accurate positioning of the barrel when it is moved to the empty barrel weighing station on the feeding and metering conveyor line by setting a swing plate driven by a pushing and positioning cylinder on the transition pushing rack, thereby improving the reliability of the multi-material automatic batching system.

[0028] Third, for a closed-loop automatic batching system of the present utility model, the chain-type conveying mechanism realizes the automatic intermittent movement of the material bucket on the batching platform by means of a specially arranged chain conveying component, which can fully achieve the long-distance intermittent movement of the material bucket in the case of batching multiple materials, and has the advantages of simple structure and low cost. Compared with the conventional automatic manipulator for shifting the material bucket, the equipment cost is greatly reduced.

[0029] Fourth, for a closed-loop automatic batching system of the present utility model, the lifting weighing mechanism realizes the lifting weighing of the material bucket on the feeding and metering conveyor line by arranging the weighing sensor between the material barrel weighing support plate and the lifting plate and using the lifting weighing cylinder as the driving element for lifting.

[0030] Fifth, for a closed-loop automatic batching system of the present utility model, when the lifting component in the lifting conveying mechanism rises, a pair of insertion plates on its upper part can move upward and be inserted into the gap between adjacent roller shafts on the automatic material bucket conveyor line, so that the closed conveyor belt above the insertion plates can lift the material bucket on the automatic material bucket conveyor line upward and laterally transfer the material bucket from the automatic material bucket conveyor line through the closed conveyor belt. Compared with the method of using a manipulator to transfer the material bucket, the device cost is low. Description of the Drawings

[0031] Figure 1 is the structural schematic diagram of the present utility model;

[0032] Figure 2 is Figure 1 the structural schematic diagram of the transition pushing and positioning mechanism in

[0033] Figure 3 is Figure 2 the structural schematic diagram of the swing plate rotatably arranged on the column of the thrust block through a hinge shaft in

[0034] Figure 4 is Figure 1 the structural schematic diagram of the chain-type conveying mechanism in

[0035] Figure 5 is installed on Figure 4 the structural schematic diagram of the chain conveying component on the chain conveying machine frame of

[0036] Figure 6 is at Figure 4 the partial enlarged schematic diagram of the discharge conveying roller shaft assembly, the first photoelectric detection sensing device and the first photoelectric detection sensing device arranged at the material bucket discharge end of the chain conveying machine frame of

[0037] Figure 7 is at Figure 4 the partial enlarged schematic diagram of the chain conveying tensioning device arranged on the chain conveying machine frame of

[0038] Figure 8 It is a schematic diagram showing an empty bucket weighing station, multiple batching stations, and a full bucket weighing station arranged on the batching platform of a chain-type conveying mechanism, and a lifting weighing mechanism is arranged below each station.

[0039] Figure 9 It is Figure 1 a schematic diagram of the structure of the lifting weighing mechanism in

[0040] Figure 10 It is to Figure 9 a schematic diagram of the structure after removing the barrel weighing support plate and the sensor housing in

[0041] Figure 11 a schematic diagram of the structure where the piston rod end of the lifting weighing cylinder is connected to the U-shaped block;

[0042] Figure 12 It is Figure 1 a schematic diagram of the structure of the lifting conveying mechanism in

[0043] Figure 13 It is to Figure 12 a schematic diagram of the structure after

[0044] Figure 14 It is Figure 12 a schematic diagram of the structure of the lifting component in

[0045] Figure 15 a schematic diagram of the structure where the piston rod end of the lifting conveying cylinder is connected to the U-shaped block.

[0046] In the figure: A, bucket automatic conveying line; B, feeding and metering conveying line; C, closed-loop conveying system; D, feeding system.

[0047] In the figure: 100, transition pushing and positioning mechanism; 101, pushing and positioning cylinder; 102, thrust block; 103, column; 104, hinge shaft; 105, swing plate; 106, gravity type stop block; 107, rectangular window; 108, transition mounting plate; 109, transition pushing rack; 110, transition conveying roller shaft assembly; 111, screw; 112, roller shaft; 113, vertical wall panel; 114, guiding and positioning plate; 115, bending part; 116, guiding plate spacing adjusting device; 117, guiding plate mounting column; 118, fastening bolt; 119, guiding rod.

[0048] In the figure: 200, chain-type conveying mechanism; 201, chain conveying machine frame; 202, batching platform; 203, first sprocket; 204, second sprocket; 205, first closed conveying chain; 206, second closed conveying chain; 207, transverse stop element; 208, empty space for placing the bucket; 209, chain transverse connecting rod; 210, conveying chain track; 211, chain conveying drive motor; 212, cushion rail; 213, discharge conveying roller shaft assembly; 214, metering and weighing window; 215, first photoelectric detection and sensing device; 216, photoelectric generator; 217, photoelectric light receiver; 218, guiding guardrail; 219, chain conveying tensioning device; 220, rectangular pipe; 221, tightening bolt; 222, tensioning seat block; 223, waist-shaped hole; 224, tensioning shaft; 225, tensioning sprocket; 226, second photoelectric detection and sensing device; 227, proximity sensor; 228, chain conveying assembly; 229, empty bucket weighing work position; 230, batching work position; 231, full bucket weighing work position.

[0049] In the figure: 300, lifting weighing mechanism; 301, base plate; 302, lifting weighing cylinder; 303, piston rod; 304, lifting plate; 305, weighing sensor assembly; 306, barrel weighing support plate; 307, guiding shaft; 308, cantilever beam single-point weighing sensor; 309, lower support connection part; 310, upper support connection part; 311, sensor housing; 312, support part cushion block; 313, clamping groove; 314, U-shaped clamping block; 315, adjusting ring; 316, locking nut; 317, edge trimming; 318, guiding element; 319, wiring lead-out window.

[0050] In the figure: 400, lifting conveying mechanism; 401, lifting assembly; 402, plug board; 403, conveyor belt assembly; 404, closed conveyor belt; 405, driving wheel; 406, driven wheel; 407, supporting guide wheel; 408, redirecting wheel; 409, lifting conveying drive motor; 410, reinforcing rib plate; 411, base; 412, lifting conveying cylinder; 413, lifting seat; 414, guiding column; 415, clamping groove; 416, U-shaped clamping block; 417, adjusting ring; 418, locking nut; 419, guiding element; 420, piston rod.

[0051] In the figure: 501, feeding machine frame; 502, feeding platform; 503, feeding device; 504, storage tank; 505, feeding station; 506, electric valve; 507, closed negative pressure suction bin; 508, negative pressure pipeline; 509, dust collector on the top of the bin; 510, negative pressure fan; 511, automatic bucket conveying machine frame; 512, automatic bucket conveying roller shaft assembly; 513, spare installation hole for the feeding device; 514, bucket; 515, suction pipeline. Specific embodiments

[0052] The following will further describe the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0053] As Figures 1 to 15 shown in the embodiment of a closed-loop automatic batching system of the present utility model, it includes a closed-loop conveying system C formed by the head-to-tail docking of a bucket automatic conveying line A and a feeding and metering conveying line B, and a feeding system D that is matched with the closed-loop conveying system C. The feeding system D includes a feeding platform 502 that is overhead arranged above the feeding and metering conveying line A through a feeding rack 501; a chain conveying mechanism 200 is arranged on the feeding and metering conveying line A. The chain conveying mechanism 200 includes a chain conveying rack 201, a batching platform 202 longitudinally arranged on the upper part of the chain conveying rack 291 along the feeding and metering conveying line A, and a chain conveying component 228 installed on the chain conveying rack 201 for realizing the longitudinal movement of the bucket 514 along the batching platform 202; on the batching platform 202, an empty bucket weighing station 229, a plurality of batching stations 230, and a full bucket weighing station 231 are sequentially arranged at intervals longitudinally according to the batching process, and lifting weighing mechanisms 300 are respectively arranged on the empty bucket weighing station 229, the plurality of batching stations 230, and the full bucket weighing station 231; a number of feeding devices 503 are arranged at intervals longitudinally on the feeding platform 502, and each of the feeding devices 503 is correspondingly located directly above each of the batching stations 230.

[0054] In this embodiment, the feeding device 503 includes a storage tank 504 fixed on the feeding platform 502, a screw feeder (not shown in the figure) connected to the lower discharge port of the storage tank 504, and a feeding pipe (not shown in the figure) arranged on the screw feeder.

[0055] Preferably, the feeding pipes on the feeding platform 502 are exactly located directly above each of the batching stations.

[0056] A closed-loop automatic batching system of this embodiment is also provided with a feeding station 505 for supplying materials to the storage tank 504. The top of the storage tank 504 is connected to a closed negative pressure suction bin 507 through an electric valve 506, and the closed negative pressure suction bin 507 is connected to the feeding station 505 through a suction pipeline 515.

[0057] In this embodiment, a level gauge is arranged on the storage tank.

[0058] Preferably, one feeding station 505 is configured for one set of feeding device 503.

[0059] In this embodiment, a dust collector 509 is provided at the top of the closed negative pressure material suction bin 507, and the dust collector 509 is connected to a negative pressure fan 510 through a negative pressure pipeline 508.

[0060] When the dust collector 509 on the top of the bin works, the negative pressure fan 510 generates negative pressure in the closed negative pressure material suction bin 507 through the dust collector 509. The material suction pipeline 515 connected between the feeding station 505 and the closed negative pressure material suction bin 507 sucks the material in the feeding station 505 into the closed negative pressure material suction bin 507. The filter on the dust collector 509 filters and removes dust to prevent the material from being discharged outside through the negative pressure fan 510. After the closed negative pressure material suction bin 507 is full of material, the material suction valve for connecting the dust collector 509 is closed, and then the electric valve 506 located between the closed negative pressure material suction bin 507 and the storage tank 504 is opened to transfer the material in the closed negative pressure material suction bin 507 into the storage tank 504. The storage capacity of the closed negative pressure material suction bin 507 is relatively less than that of the storage tank 504, and the material in the closed negative pressure material suction bin 507 can be transferred into the storage tank 504 in batches until the storage tank 504 is full.

[0061] In this embodiment, the automatic bucket conveyor line A includes an automatic bucket conveyor frame 511 and an automatic bucket conveyor roller assembly 512 arranged on the upper part of the automatic bucket conveyor frame 511; the automatic bucket conveyor roller assembly 512 includes a plurality of rollers arranged at intervals and rotatably arranged on the automatic bucket conveyor frame 512.

[0062] In this embodiment, the chain conveyor assembly 228 includes four first sprockets 203 respectively arranged at the four corner positions on the longitudinal one side of the chain conveyor frame 201, four second sprockets 204 respectively arranged at the four corner positions on the longitudinal other side of the chain conveyor frame 201, a first closed conveyor chain 205 wound around the four first sprockets 203, a second closed conveyor chain 206 wound around the four second sprockets 204, and a plurality of transverse stop elements 207 arranged at intervals and transversely connected between the first closed conveyor chain 205 and the second closed conveyor chain 206; wherein, the upper parts of the first closed conveyor chain 205 and the second closed conveyor chain 206 are located on both sides above the batching platform 202, and a bucket placement space 208 for placing the bucket on the batching platform 202 is formed between adjacent transverse stop elements 207.

[0063] Preferably, the lower parts of the first closed conveyor chain 205 and the second closed conveyor chain 206 are located on both sides below the batching platform 202.

[0064] Preferably, each of the transverse bar elements 207 includes a pair of chain transverse connecting rods 209 arranged close to each other.

[0065] In this embodiment, conveying chain tracks 210 are arranged on the longitudinal two sides of the batching platform 202, and the upper parts of the first closed conveying chain 205 and the second closed conveying chain 206 are respectively supported on the conveying chain tracks 210 on both sides.

[0066] In this embodiment, a chain conveying drive motor 211 is arranged on one longitudinal side of the chain conveying machine frame 201, and one of the four first sprockets 203 and one of the four second sprockets 204 are both fixed on the output shaft of the chain conveying drive motor 211.

[0067] In this embodiment, a pair of cushion tracks 212 for placing the material buckets are arranged along the longitudinal two sides on the batching platform 202.

[0068] In this embodiment, two rows of discharging conveying roller shaft assemblies 213 are arranged at the position of the material bucket discharging end on the chain conveying machine frame 201. The two rows of discharging conveying roller shaft assemblies 213 are respectively arranged on the longitudinal two sides of the batching platform 202, and the roller shaft conveying surface formed by the two rows of discharging conveying roller shaft assemblies 213 is arranged at the same height as the upper end surface of the cushion track 212.

[0069] In this embodiment, a plurality of batching stations are arranged at intervals along the longitudinal direction on the batching platform 202, and a metering and weighing window 214 penetrating up and down is arranged at the position of the batching station on the batching platform 202.

[0070] The above-mentioned metering and weighing window 214 is used to install a lifting weighing mechanism on the chain conveying machine frame 201, the upper part of which can pass through the metering and weighing window 214, so as to realize weighing and metering of the material bucket at the batching station.

[0071] Preferably, a first photoelectric detection and sensing device 215 for detecting the position of the material bucket is arranged at the position of the two rows of discharging conveying roller shaft assemblies 213 on the upper part of the chain conveying machine frame 201.

[0072] Preferably, the first photoelectric detection and sensing device 215 includes a photoelectric generator 216 and a photoelectric light receiver 217. The photoelectric generator 216 and the photoelectric light receiver 217 are respectively arranged on the longitudinal two sides above the batching platform 202 and face each other; the number of the first photoelectric detection and sensing devices 215 is set to two groups, and the two groups of the first photoelectric detection and sensing devices 215 are arranged at the longitudinal front and rear positions above the two rows of discharging conveying roller shaft assemblies 213.

[0073] Preferably, second photoelectric detection and sensing devices 226 for detecting the positions of the transverse stop lever elements 207 are further provided at the upper longitudinal two-side positions of the chain conveying machine frame 201. The second photoelectric detection and sensing devices 226 include a pair of proximity sensors 227 arranged at intervals; the detection probes of the pair of proximity sensors 227 are respectively arranged downward and point to a pair of chain transverse connecting rods 209 of the transverse stop lever element 207 located directly below. When the pair of chain transverse connecting rods 209 just move to directly below the detection probes of the pair of proximity sensors 227, the positions of the pair of chain transverse connecting rods 209 will be detected by the pair of proximity sensors 227.

[0074] Preferably, guiding guardrails 218 for lateral limiting of the material buckets are provided at the inner side positions of the batching platform 202 close to the first closed conveying chain 205 and the first closed conveying chain 206.

[0075] In this embodiment, a chain conveying tensioning device 219 is further provided on the chain conveying machine frame 201.

[0076] Preferably, the chain conveying tensioning device 219 includes a rectangular tube 220 provided on the chain conveying machine frame 201, a tensioning seat block 222 slidably arranged inside the rectangular tube 220 and achieving tensioning movement through a tensioning bolt 221, a kidney-shaped hole 223 opened on one side of the rectangular tube 220, a tensioning shaft 224 rotatably arranged on the tensioning seat block 222 and extending outside the rectangular tube 220 through the kidney-shaped hole 223, and a tensioning sprocket 225 installed on the tensioning shaft 224.

[0077] Among them, the number of the chain conveying tensioning devices is two sets, and the tensioning sprockets 225 of the two sets of chain conveying tensioning devices 219 are respectively in transmission connection with the first closed conveying chain 205 and the second closed conveying chain 206.

[0078] In this embodiment, the chain conveying drive motor 211 is a servo reduction motor.

[0079] The chain-type conveying mechanism of the closed-loop automatic batching system in this embodiment, as the feeding and metering conveying line of the automatic batching system, is used to realize multi-station batching on the batching platform 202. Its specific working principle is as follows:

[0080] During operation, the empty-bag-containing barrels from the barrel automatic conveying line are sent to the empty-barrel weighing station 229 of the chain-type conveying mechanism, and the barrels at this station are exactly located in the barrel placement neutral gear 208 of the chain conveying assembly 228; the lifting weighing mechanism located below this batching station rises and passes through the metering weighing window, jacks up the barrel from the batching platform 202, and weighs and measures the empty barrel. After the empty-barrel weighing and measuring is completed, the lifting weighing mechanism descends and resets. The control system of the automatic batching system drives the chain conveying drive motor 211 to act, driving the closed conveying chains 205 and 206 of the chain conveying assembly 228 to move. When the closed conveying chains 205 and 206 move, the transverse baffle elements 201 on them push the barrel to move forward synchronously on the cushion rail 212 of the batching platform 202 until it moves to the next batching station 230. At this batching station 230, the lifting weighing mechanism jacks up the barrel, and at the same time drives the feeding device above the barrel to feed the barrel while weighing. After reaching the set feeding amount, the feeding stops, thus completing the batching of one kind of material; it is successively sent to the subsequent batching stations 230 to respectively perform the batching of different kinds of materials. After successively completing the batching of several kinds of materials, the barrel is moved to the full-barrel weighing station 231, and the lifting weighing mechanism 300 at this station weighs and measures and reviews the total weight of the barrel after batching; after the weighing and measuring review of the total weight of the barrel is completed, the barrel is pushed by the transverse baffle element 207 of the chain conveying assembly 228 to the barrel discharge end of the chain conveying rack 201, and moves from the discharge conveying roller shaft assembly 213 at the barrel discharge end of the chain conveying rack 201 to the rear of the barrel automatic conveying line to perform subsequent barrel bag taking and barrel bag placing, realizing cyclic batching.

[0081] As a further improvement of this embodiment, a transition pushing and positioning mechanism 100 is provided at the position between the front part of the barrel automatic conveying line A and the empty-barrel weighing station 229 of the feeding and metering conveying line B. The transition pushing and positioning mechanism 100 includes a pushing and positioning cylinder 101, a thrust block 102 provided at the front end of the piston rod of the pushing and positioning cylinder 101, a column 103 vertically erected upward on the upper part of the thrust block 102, and a swing plate 105 rotatably provided at the upper end part of the column 103 through a hinge shaft 104. A gravity-type stop block 106 is provided on the lower end surface of the rear part of the swing plate 105. The swing plate 105 swings around the hinge shaft 104 to lift its front end upward by virtue of the swinging moment generated by the gravity of the gravity-type stop block 106, and after the front end of the swing plate 105 is lifted upward, the gravity-type stop block 106 abuts against the rear side surface of the column 103.

[0082] Preferably, a rectangular window 107 penetrating from top to bottom is provided on the swing plate 105, the upper end of the column 103 is movably embedded in the rectangular window 107, and the hinge shaft 104 is arranged at the position where the upper end of the column 103 and the rectangular window 107 on the swing plate 105 are embedded.

[0083] Preferably, the pushing and positioning cylinder 101 is a dual-axis pushing and positioning cylinder.

[0084] Preferably, a transition mounting plate 108 is connected between the front ends of a pair of piston rods of the dual-axis pushing and positioning cylinder 101 , and the thrust block 102 is fixed to the transition mounting plate 108 by screws 111 .

[0085] In this embodiment, the transition pushing and positioning mechanism also includes a transition pushing frame 109, and two rows of transition conveying roller assemblies 110 are arranged on the upper part of the transition pushing frame 109. The pushing and positioning cylinder 101 with the swing plate 105 is installed between the two rows of transition conveying roller assemblies 110; the roller conveying direction formed by the two rows of transition conveying roller assemblies 110 is consistent with the forward pushing direction of the pushing and positioning cylinder 101.

[0086] In this embodiment, the upper end of the column 103 is lower than the roller conveying surface formed by the transition conveying roller assembly 110; when the swing plate 105 is lifted upward, the front upper end surface of the swing plate 105 is higher than the roller conveying surface; when the swing plate 105 swings to a position parallel to the roller conveying surface, the upper end surface of the swing plate 105 is lower than the roller conveying surface.

[0087] In this embodiment, each of the transition conveying roller assemblies 110 includes a plurality of rollers 112 arranged at intervals, and a pair of vertical wall panels 113 arranged at both ends of the plurality of rollers 112 arranged at intervals. The rollers 112 are rotatably arranged between the pair of vertical wall panels 113, and the lower ends of the vertical wall panels 113 are fixed on the transition pushing frame 109.

[0088] Among them, the upper end surface of the inner vertical wall panel 113 of the pair of vertical wall panels 113 is lower than the roller conveying surface.

[0089] Two rows of transition conveying roller assemblies 110 are arranged on the upper part of the above-mentioned transition pushing frame, and the pushing positioning cylinder 101 with a swing plate 105 is arranged between the two rows of transition conveying roller assemblies 110 on the upper part of the transition pushing frame 109, thereby avoiding mutual interference between the swing plate 105 and the barrel when the barrel moves, and the swing plate 105 relies on its own weight to achieve light swinging and avoidance, and will not produce large resistance to the movement of the barrel on the transition conveying roller assembly 110, and its working reliability is good.

[0090] In this embodiment, a pair of guide positioning plates 114 parallel to the conveying direction of the roller 112 and arranged upright are arranged on the outer side of the transition pushing frame 109 above the two rows of transition conveying roller assemblies 110, and a pair of bending portions 115 are correspondingly arranged at the rear ends of the pair of guide positioning plates 114, and a trumpet-shaped guide inlet is formed between the pair of bending portions 115.

[0091] As a further improvement of this embodiment, the transition pushing frame 109 is further provided with a guide plate spacing adjustment device 116 for adjusting the spacing between the pair of guide positioning plates 114 .

[0092] Preferably, the guide plate spacing adjustment device 116 includes guide plate mounting columns 117 which are respectively erected on the transition pushing frame 109 and close to the outer sides of the two rows of transition conveying roller assemblies 110, and the number of guide plate mounting columns 117 on each side is a pair, and the upper part of the guide plate mounting column 117 is provided with a guide plate mounting hole corresponding to the direction parallel to the roller shaft 112, and the top of the guide plate mounting column 117 is provided with a fastening bolt 118 connected to the guide plate mounting hole, and the back side of the guide positioning plate 114 is provided with a pair of guide rods 119, and the pair of guide rods 119 are correspondingly inserted into the guide plate mounting holes of the pair of guide plate mounting columns 117 and fixed by the fastening bolts 118.

[0093] The guide plate spacing adjustment device 116 can adapt to the guidance of barrels with different diameters and has good flexibility.

[0094] Preferably, a counterweight screw for adjusting the swing torque is also installed on the gravity stopper 106 .

[0095] Preferably, a counterweight plate may be provided between the gravity stopper 106 and the counterweight screw.

[0096] Preferably, a rectangular window 107 pointing to the swing plate 105 is provided at the lower part of the transition push frame 109 to sense whether there is a photoelectric detection sensor passing above the swing plate 105 .

[0097] The working principle of the transition push rack 109 in this embodiment is as follows:

[0098] The transition pushing positioning mechanism with a transition pushing rack 109 is installed between the front part of the barrel automatic conveying line and the first station (empty barrel weighing station) of the feeding and metering conveying line. When the automatic batching system is running, the barrels from the barrel automatic conveying line are conveyed onto the transition conveying roller shaft assembly 110 of the transition pushing positioning mechanism. The barrels move forward on the roller shafts 112 of the transition conveying roller shaft assembly 110, pressing down and passing over the swing plate 105 with its front end upturned, so that the barrels are located in front of the swing plate 105. After reaching the position, the swing plate 105 resets to the state with its front end upturned under the gravity of the gravity block 105. Subsequently, the control system of the automatic batching system drives the pushing positioning cylinder 101 to act, driving the thrust block 102 and the swing plate 105 on the push-pull block 102 to move forward together, so that the upturned front end of the swing plate 105 pushes the barrel to move to the batching station, realizing the accurate positioning of the barrel at the first batching station of the feeding and metering conveying line.

[0099] In this embodiment, the lifting weighing mechanism 300 includes a substrate 301 fixed on the chain conveying rack 201 and located below the batching platform 202, a lifting weighing cylinder 302 fixed on the substrate 301, a lifting plate 304 arranged above the substrate 301 and connected to the piston rod 303 of the lifting weighing cylinder 302, a weighing sensor assembly 305 arranged on the upper end surface of the lifting plate 304, and a barrel weighing support plate 306 connected to the upper part of the weighing sensor assembly 305. A number of guide shafts 307 are vertically arranged downward around the periphery of the lifting weighing cylinder 302 on the lower end surface of the lifting plate 304, and a number of corresponding guide holes are arranged on the substrate 301. The guide shafts 307 are slidably connected with the guide holes. A metering and weighing window 214 is opened on the batching platform 202 for the upper part of the lifting weighing mechanism 300 to move up and down through.

[0100] Among them, the lifting weighing mechanism 300 is installed below the metering and weighing window 214.

[0101] Preferably, the weighing sensor assembly 305 includes a cantilever beam single-point weighing sensor 308. A lower support connection part 309 fixedly connected to the lifting plate 304 is arranged at the right lower part of the lower end of the cantilever beam single-point weighing sensor 308, and an upper support connection part 310 fixedly connected to the barrel weighing support plate 306 is arranged at the left upper part of the upper end of the cantilever beam single-point weighing sensor 308.

[0102] Preferably, the weighing sensor assembly 305 further includes a sensor housing 311 for covering the cantilever single-point weighing sensor 308. The sensor housing 311 is fixed on the upper support connection part 310 of the cantilever single-point weighing sensor 308, and the barrel weighing support plate 306 is fixed on the upper end face of the sensor housing 311.

[0103] Preferably, support pads 312 are respectively provided between the sensor housing 311 and the upper support connection part 310 of the cantilever single-point weighing sensor 308, and between the lower support connection part 309 of the cantilever single-point weighing sensor 308 and the lifting plate 304.

[0104] In this embodiment, the number of the guide shafts 307 is 3 to 4.

[0105] In this embodiment, a clamping groove 313 is provided at the end of the piston rod 303 of the lifting weighing cylinder 302. A U-shaped clamping block 314 is fixed on the lower end face of the lifting plate 304, and the U-shaped clamping block 314 is clamped on the clamping groove 313 at the end of the piston rod 303 of the lifting weighing cylinder 302.

[0106] Preferably, an adjusting ring 315 is threadedly connected to the outer circumference of the end of the piston rod 303 of the lifting weighing cylinder 302, and the adjusting ring 315 is locked and fixed on the threaded outer circumference of the end of the piston rod 303 through a locking nut 316. The clamping groove 313 is provided on the outer circumference of the adjusting ring 315, and the U-shaped clamping block 314 is clamped on the clamping groove 313 on the outer circumference of the adjusting ring 315 at the end of the piston rod 303 of the lifting weighing cylinder 302.

[0107] Preferably, the barrel weighing support plate 306 is a disc-shaped support plate, and chamfers 317 are provided on both sides of the disc-shaped support plate.

[0108] The chamfers 317 on both sides of the above-mentioned disc-shaped support plate are used to be adapted to the metering and weighing windows opened at the batching stations of the batching platform, so as to ensure that the lifting weighing mechanism can move up and down in the metering and weighing windows. During operation, the lifting weighing cylinder 302 acts to drive the barrel weighing support plate 306 to pass through the metering and weighing window to above the batching platform, so as to lift the barrel and dock with the upper feeding device, and realize weighing and metering during the feeding process. After the feeding is completed, the barrel weighing support plate 306 moves down to below the batching platform, and the barrel falls back onto the batching platform. Subsequently, the barrel moves to the next batching station through the feeding, metering and conveying line of the automatic batching system for batching of another material.

[0109] In this embodiment, the upper support connection part 310 at the upper left part of the cantilever single-point weighing sensor 308 is connected to the central part of the lower end face of the disc-shaped support plate through the support pad 312.

[0110] Preferably, a plurality of guiding elements 318 are provided at the lower end of the substrate 301, the guiding holes are provided on the guiding elements 318 at the lower end of the substrate 301, and the guiding shaft 307 is slidably connected with the guiding holes on the guiding elements 318 at the lower end of the substrate 301.

[0111] Preferably, the guiding element 318 is a linear bearing.

[0112] In this embodiment, a wiring lead-out window 319 is provided on one side of the sensor housing 311.

[0113] In this embodiment, a lifting conveying mechanism 400 is further provided at the rear of the automatic barrel conveying line A and is installed at a position below the automatic barrel conveying roller shaft assembly 512. The lifting conveying mechanism 400 includes a lifting assembly 401, a pair of inserting plates 402 erected on the upper part of the lifting assembly 401, and a pair of conveyor belt assemblies 403 respectively arranged on the sides of the pair of inserting plates 402. Each conveyor belt assembly 403 includes a closed conveyor belt 404, a driving wheel 405 and a driven wheel 406 respectively connected to both ends of the closed conveyor belt 405, and a plurality of spaced support guide wheels 407 arranged between the driving wheel 405 and the driven wheel 406 and abutted against the inner side of the closed conveyor belt 404. The closed conveyor belt 404 is horizontally arranged, and the upper conveying surface of the horizontally arranged closed conveyor belt 404 is higher than the upper end surface of the inserting plate 402. Moreover, one end of the horizontally arranged closed conveyor belt 404 is also provided with a downward extending turning section. The driving wheel 405 is connected to one end of the downward turning section of the closed conveyor belt 404, the driven wheel 406 is connected to the other end of the closed conveyor belt 404, and a deflecting wheel 408 for realizing the turning of the closed conveyor belt 404 is also abutted at the corner of the turning of the closed conveyor belt 404. The driving wheel 405, the driven wheel 406, the support guide wheels 407 and the deflecting wheel 408 are respectively rotatably arranged on the inserting plate 402; a lifting conveying driving motor 409 is further installed between the pair of inserting plates 402, and the pair of driving wheels 405 corresponding to the pair of conveyor belt assemblies 403 are respectively connected to the output shaft of the lifting conveying driving motor 409.

[0114] Preferably, the turning angle of the downward turning section of the closed conveyor belt 404 is 90 degrees.

[0115] Preferably, the driving wheel 405, the driven wheel 406, the support guide wheels 407 and the deflecting wheel 408 are all arranged on the outside of the inserting plate 402.

[0116] In this embodiment, the lifting and conveying drive motor 409 is fixed on one of the pair of plug plates 402; the lifting and conveying drive motor 409 is a double-shaft output motor, and the drive wheels 405 on the pair of conveyor belt assemblies 403 are respectively connected to the output shafts at both ends of the double-shaft output motor.

[0117] Preferably, the pair of plug plates 402 are arranged in parallel with each other.

[0118] Preferably, a reinforcing rib plate 410 is further connected between the lower parts of the pair of plug plates 402.

[0119] In this embodiment, the lifting assembly 401 includes a base 411, a lifting and conveying cylinder 412 fixed on the base 411, a lifting seat 413 arranged above the base 411 and connected to the end of the piston rod 420 of the lifting and conveying cylinder 412, and a plurality of guide posts 414 erected at the lower end of the lifting seat 413 and located outside the periphery of the lifting and conveying cylinder 412. A plurality of guide holes are correspondingly arranged on the base 411, and the guide posts 414 are slidably connected with the guide holes in a sliding fit; the pair of plug plates 402 are fixed on the upper end surface of the lifting seat 413.

[0120] Preferably, the number of the guide posts 414 is 3 to 4.

[0121] In this embodiment, a clamping groove 415 is arranged at the end of the piston rod 420 of the lifting and conveying cylinder 412, a U-shaped clamping block 416 is fixed on the lower end surface of the lifting seat 413, and the U-shaped clamping block 416 is clamped on the clamping groove 415 at the end of the piston rod 420 of the lifting and conveying cylinder 412.

[0122] Preferably, an adjusting ring 417 is threadedly connected to the outer circle of the end of the piston rod 420 of the lifting and conveying cylinder 412, and the adjusting ring 417 is locked and fixed on the threaded outer circle of the end of the piston rod 420 through a locking nut 418; the clamping groove 415 is arranged on the outer circle of the adjusting ring 417, and the U-shaped clamping block 416 is clamped on the clamping groove 415 on the outer circle of the adjusting ring 417 at the end of the piston rod 420 of the lifting and conveying cylinder 409.

[0123] In this embodiment, a plurality of guiding elements 419 are arranged at the upper end of the base 411, the guiding holes are arranged on the guiding elements 419 at the upper end of the base 411, and the guide posts 414 are slidably connected with the guiding holes on the guiding elements 419 at the upper end of the base 411 in a sliding fit.

[0124] Preferably, the guiding element 418 is a linear bearing.

[0125] In this embodiment, the lifting and conveying mechanism is horizontally installed below the conveying roller shaft of the automatic bucket conveying line.

[0126] During operation, the control system of the automatic batching system drives the lifting and conveying cylinder 409 to act, driving the conveyor belt assembly 403 located above the lifting assembly 401 to rise, so that the insertion plate 402 equipped with the closed conveyor belt 404 passes upward from below the automatic bucket conveying line through the gap between adjacent roller shafts on the automatic bucket conveying line. The closed conveyor belt 404 lifts the bucket located on the automatic bucket conveying line. Subsequently, the lifting and conveying drive motor 409 is driven to act, driving the closed conveyor belt 404 to move, so that the bucket lifted on the closed conveyor belt 404 is laterally moved out of the automatic bucket conveying line, thus realizing the lateral transfer of the bucket.

[0127] Preferably, a row of spare installation holes 513 for the feeding device are also arranged at intervals along the longitudinal direction on the feeding platform 502, and the row of spare installation holes 513 for the feeding device are arranged adjacent and offset to a number of feeding devices 503 on the feeding platform 502.

[0128] Preferably, a bucket bagging station and a bucket bag taking station are also provided on the automatic bucket conveying line A, which are respectively used for bagging empty buckets and taking bags after batching.

[0129] When the automatic batching system is working, the materials from the feeding station 505 are sucked into the closed negative pressure suction bin 507 through the suction pipeline 515, and then the materials in the closed negative pressure suction bin 507 are transferred to the storage tank 504 by opening the electric valve 506; during the batching process, the transition pushing and positioning mechanism 100 transports the bucket 514 with empty bags at the front of the bucket automatic conveying line A to the empty bucket weighing station 229 on the feeding and metering conveying line B. The lifting weighing mechanism 300 at this station first weighs and measures the empty bucket, and then sends it to the subsequent batching station. The materials are gradually added into the bucket 514 through the screw feeder on the feeding device 503, and the lifting weighing mechanism 300 below weighs and measures (weight gain measurement). After reaching the set feeding amount, the feeding stops, thus completing the batching of one kind of material; it is successively sent to the subsequent batching stations 230 to respectively carry out the batching of different kinds of materials. After successively completing the batching of several kinds of materials, the bucket 514 is moved to the full bucket weighing station 231, and the lifting weighing mechanism 300 at this station weighs and measures the total weight of the bucket after batching for review; after the bucket 514 completes the weighing and measurement review, it is transported from the feeding and metering conveying line B to the rear of the bucket automatic conveying line A, and successively reaches the bag-taking station and the bag-placing station of the bucket automatic conveying line A; at the bag-taking station of the bucket, the bag-taking manipulator of the bucket takes away the bag filled with batching in the bucket; the bucket without the bag is moved to the bag-placing station of the bucket automatic conveying line, and the empty bag is placed into the bucket by the bag-placing manipulator of the bucket. Subsequently, the bucket 514 with the empty bag returns to the front of the bucket automatic conveying line, and then is transported to the empty bucket weighing station 229 on the feeding and metering conveying line B again. In this way, the automatic cyclic batching of multiple materials is realized. The bucket with the total weight not meeting the requirements after batching is horizontally removed and transferred to the outside of the bucket automatic conveying line through the lifting conveying mechanism 400.

[0130] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A closed-loop automatic batching system, characterized in that: The invention comprises a closed-loop conveying system formed by an automatic barrel conveying line and a feeding metering conveying line through end-to-end docking, and a feeding system matched with the closed-loop conveying system, wherein the feeding system comprises a feeding platform which is suspended above the feeding metering conveying line through a feeding frame; a chain conveying mechanism is arranged on the feeding metering conveying line, and the chain conveying mechanism comprises a chain conveying frame, a batching platform arranged on the upper part of the chain conveying frame along the longitudinal direction of the feeding metering conveying line, and a chain conveying assembly installed on the chain conveying frame for realizing the longitudinal movement of the barrel along the batching platform; an empty barrel weighing station, a plurality of batching stations and a full barrel weighing station are arranged in sequence along the longitudinal direction according to the batching process on the batching platform, and a lifting weighing mechanism is respectively arranged on the empty barrel weighing station, the plurality of batching stations and the full barrel weighing station; a number of feeding devices are arranged at intervals along the longitudinal direction on the feeding platform, and each of the feeding devices is correspondingly located directly above each of the batching stations.

2. A closed-loop automatic batching system according to claim 1, characterized in that: The feeding device comprises a storage tank fixed on the feeding platform, a screw feeder connected to a discharge port at the lower part of the storage tank, and a feed discharge pipe arranged on the screw feeder.

3. A closed-loop automatic batching system according to claim 2, characterized in that: A feeding station is also provided for supplying materials to the storage tank. The top of the storage tank is connected to a closed negative pressure suction bin via an electric valve, and the closed negative pressure suction bin is connected to the feeding station via a suction pipeline.

4. A closed-loop automatic batching system according to claim 3, characterized in that: A silo top dust collector is arranged on the top of the closed negative pressure suction silo, and the silo top dust collector is connected to the negative pressure fan through a negative pressure pipeline.

5. A closed-loop automatic batching system according to claim 1, characterized in that: The automatic barrel conveying line includes an automatic barrel conveying frame and an automatic barrel conveying roller assembly arranged on the upper part of the automatic barrel conveying frame; the automatic barrel conveying roller assembly includes a plurality of rollers which are sequentially arranged at intervals and rotatably arranged on the automatic barrel conveying frame.

6. A closed-loop automatic batching system according to claim 1, characterized in that: The chain conveyor assembly includes four first sprockets disposed at four corner positions on one longitudinal side of the chain conveyor frame, four second sprockets disposed at four corner positions on the other longitudinal side of the chain conveyor frame, a first closed conveying chain connected around the four first sprockets, a second closed conveying chain connected around the four second sprockets, and a number of transverse baffle rod elements transversely connected between the first closed conveying chain and the second closed conveying chain and arranged at intervals; wherein the upper parts of the first closed conveying chain and the second closed conveying chain are located on both sides above the batching platform, and gaps are formed between adjacent transverse baffle rod elements for placing barrels on the batching platform.

7. A closed-loop automatic batching system according to claim 1, characterized in that: A transition push positioning mechanism is arranged between the front of the automatic barrel conveyor line and the empty barrel weighing station of the material adding and metering conveyor line, and the transition push positioning mechanism includes a push positioning cylinder and a thrust block arranged at the front end of the piston rod of the push positioning cylinder, a column erected upwardly on the upper part of the thrust block, and a swing plate arranged at the upper end of the column through a hinge shaft, and a gravity stopper is arranged on the rear lower end surface of the swing plate. The swing plate relies on the swinging torque generated by the gravity of the gravity stopper to make the swing plate swing around the hinge shaft until its front end is lifted upward, and after the front end of the swing plate is lifted upward, its gravity stopper abuts against the rear side surface of the column.

8. A closed-loop automatic batching system according to claim 1, characterized in that: The lifting weighing mechanism includes a base plate fixed on the chain conveyor frame and located below the batching platform, a lifting weighing cylinder fixed on the base plate, a lifting plate arranged above the base plate and connected to the piston rod of the lifting weighing cylinder, a weighing sensor assembly arranged on the upper end surface of the lifting plate, and a barrel weighing support plate connected to the upper part of the weighing sensor assembly; a number of guide shafts are vertically arranged downward around the periphery of the lifting weighing cylinder on the lower end surface of the lifting plate, and a number of guide holes are correspondingly arranged on the base plate, and the guide shafts are slidably connected with the guide holes; a metering weighing window is opened on the batching platform for the upper part of the lifting weighing mechanism to move up and down.

9. A closed-loop automatic batching system according to claim 5, characterized in that: A lifting conveying mechanism installed below the automatic barrel conveying roller assembly is also provided at the rear of the automatic barrel conveying line. The lifting conveying mechanism includes a lifting assembly, a pair of plug plates vertically arranged on the upper part of the lifting assembly, and a pair of conveyor belt assemblies respectively arranged on the sides of the pair of plug plates. Each of the conveyor belt assemblies includes a closed conveyor belt, a driving wheel and a driven wheel respectively connected to the two ends of the closed conveyor belt, and a plurality of support guide wheels arranged at intervals and arranged between the driving wheel and the driven wheel and abutting against the inner side of the closed conveyor belt. The closed conveyor belt is horizontally arranged, and the upper end conveyor of the horizontally arranged closed conveyor belt is The surface is higher than the upper end surface of the plug plate, and one end of the horizontally arranged closed conveyor belt is also provided with a turning section extending downward, the driving wheel is connected to one end of the downward turning section of the closed conveyor belt, the driven wheel is connected to the other end of the closed conveyor belt, and a redirecting wheel for realizing the turning of the closed conveyor belt is also abutted at the corner of the turning place of the closed conveyor belt, and the driving wheel, the driven wheel, the supporting guide wheel and the redirecting wheel are respectively rotatably arranged on the plug plate; a lifting and conveying driving motor is also installed between the pair of plug plates, and the pair of driving wheels corresponding to the pair of conveyor belt assemblies are respectively connected to the output shaft of the lifting and conveying driving motor.

10. A closed-loop automatic batching system according to claim 1, characterized in that: A row of spare installation holes for feeding devices is also arranged on the feeding platform at intervals along the longitudinal direction. The row of spare installation holes for feeding devices is arranged adjacent to a number of feeding devices on the feeding platform and is staggered.

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