Closed feeding device

Abstract

The utility model discloses a closed feeding device which comprises a track platform, a feeding trolley and a feeding machine. The feeding machine is of a box structure, a feeding opening with a feeding door is formed in the side wall of the feeding machine, a cutter assembly is arranged at the position, close to the feeding opening, in the feeding machine, a discharging hopper is arranged at the bottom of the feeding machine, and a material bag overturning mechanism and a material bag fixing mechanism are further arranged in the feeding machine and located above the discharging hopper. The feeding trolley supports a material bag, the material bag is pushed into the feeding opening along the track platform and is borne by the material bag overturning mechanism, the material bag is cut open by the cutter assembly in the pushing-in process, the feeding door is closed after the material bag is completely pushed in, and the material bag fixing mechanism fixes the material bag and the feeding trolley to the material bag overturning mechanism. The feeding trolley and the material bag fixing mechanism are overturned by 90 degrees together through the material bag overturning mechanism, dust overflowing pollution can be effectively controlled, and meanwhile cost and consumption are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polypropylene processing, in particular to a closed feeding device. Background Art

[0002] When polypropylene is granulated, it is necessary to add auxiliary powder. When adding materials, the feeding worker lifts the side cover of the feeder, turns on the dust removal fan, manually cuts the bag and pours the powder into it. Because the cut hole in the bag is poured into the feeder box at the edge of the feeder port, it is very easy to cause dust overflow during pouring. In addition, because the dust removal fan cannot form enough negative pressure at the feeding port of the feeder box, it will also cause the auxiliary dust to overflow, making the working environment of the granulation unit poor. The overflowing dust also causes the waste of auxiliary powder and increases the production cost. Utility Model Content

[0003] The purpose of the utility model is to provide a closed feeding device to solve the above problems in the prior art, so as to realize closed feeding, control pollution, reduce costs and save consumption.

[0004] The technical solution of the utility model is described in detail as follows:

[0005] A closed feeding device comprises a track platform, a feeding trolley and a feeding machine;

[0006] The feeder is a box structure, the side wall of the feeder is provided with a feeding port with a feeding door, a cutting knife assembly is provided near the feeding port in the feeder, a lower hopper is provided at the bottom of the feeder, and a bag turning mechanism and a bag fixing mechanism are provided above the lower hopper inside the feeder;

[0007] The loading trolley supports the material bag and is pushed into the loading port along the rail platform and is received by the material bag flipping mechanism. During the pushing process, the material bag is cut open by the cutting knife assembly. After it is fully pushed in, the feed door is closed, and the material bag fixing mechanism fixes the material bag and the loading trolley on the material bag flipping mechanism. The material bag flipping mechanism flips the loading trolley and the material bag fixing mechanism together by 90° to realize closed feeding.

[0008] Optionally or preferably, the rail platform is also provided with a guide roller, which is used for adjusting the side of the loading bag of the loading trolley to be parallel to the moving direction of the loading trolley when the loading trolley moves toward the feeder; the feeder is also provided with a bag pressing roller near the loading port, which is used for pressing the material bag downward when the loading trolley is pushed into the loading port so that the two sides of the material bag expand and are closer to the cutting knife assembly to be cut open.

[0009] Optionally or preferably, a filter is further provided at the top of the feeder, wherein the filter is equipped with a filter element and a filter fan, and the filter fan provides negative pressure so that the filter element of the filter can absorb dust suspended in the air in the feeder.

[0010] Optionally or preferably, the feeder is further provided with a backflush system, which includes a nitrogen storage tank, an electromagnetic pulse valve and an aeration head which are sequentially connected through pipelines, the electromagnetic pulse valve controls the switch of the nitrogen storage tank, and when the nitrogen storage tank is turned on, compressed nitrogen is sprayed through the aeration head to blow the filter element of the filter to make the dust accumulated on the filter element fall.

[0011] Optionally or preferably, a baffle and a telescopic mechanism are also provided in the feeder, wherein the lower end of the baffle is hinged to the inner wall of the feeder by a hinge mechanism, and the upper end of the baffle extends obliquely to below the filter element of the filter; the telescopic mechanism is fixedly mounted on the inner wall of the feeder to control the rotation of the baffle along the hinge mechanism and thereby control the upper end of the baffle to rotate to below the filter element or to rotate away from the filter element and close to the inner wall of the feeder.

[0012] Optionally or preferably, the telescopic mechanism includes a butterfly valve and a butterfly valve cylinder, and the butterfly valve is connected to the baffle and rotates the baffle under the drive of the butterfly valve cylinder.

[0013] Optionally or preferably, a screen is provided in the lower hopper, and the screen is foldable with a folding angle of 90°.

[0014] Optionally or preferably, the bag fixing mechanism includes a bracket, a bag fixing cylinder, a mounting plate and a bag pressing needle, the bag fixing cylinder is installed on the bracket and can rotate relative to the bracket, the lower end of the bag fixing cylinder is fixedly connected to the mounting plate, and the bag pressing needle is installed below the mounting plate with the needle tip facing downward; the bag fixing cylinder drives the bag pressing needle to move downward and insert into the bag to fix the bag on the loading trolley.

[0015] Optionally or preferably, a purge nozzle is also installed on the mounting plate, the upper end of the purge nozzle is connected to a purge gas source through a pipeline, and the lower end of the purge nozzle is a beveled needle tube structure for insertion into the material bag for purging.

[0016] Optionally or preferably, the material bag flipping mechanism includes a flipping table, a transmission shaft and a flipping servo motor, the upper surface of the flipping table is provided with two rows of elastic positioning wheel groups, and the lower surface of the flipping table is fixedly connected to the transmission shaft; the lower surface of the loading trolley is fixedly installed with a positioning piece with grooves on both sides; the loading trolley is pushed to the flipping table of the material bag flipping mechanism, the positioning piece is inserted between the two rows of elastic positioning wheel groups and the positioning wheel groups are stuck in the grooves to reach the predetermined position; the flipping servo motor drives the flipping table together with the loading trolley and the material bag fixed on the flipping table by the material bag fixing mechanism to flip 90°.

[0017] Optionally or preferably, an in-position contact switch is provided on the inner rear side wall of the feeder, and the in-position contact switch is connected to the PLC and is used for the loading trolley to touch after the loading trolley enters the preset position of the bag flipping mechanism to transmit a signal to the PLC for the next control operation.

[0018] Optionally or preferably, the feed door of the feeder is provided with a door closing contact switch, and the door closing contact switch is connected to the PLC for transmitting a signal to the PLC for the next control operation after the door is closed.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] By transporting the material bag directly to the inside of the feeder and closing the feed door before feeding, sealed feeding is achieved. At the same time, the filter fan works to form a partial vacuum to absorb the dust suspended in the space of the feeder, avoiding the pollution caused by dust spillage and the trouble of collecting and treating the spilled dust. The filter is also equipped with a backflush system. A baffle is also set under the filter element of the filter. When the filter is not working, the backflush system is started to blow the dust adsorbed by the filter element down along the baffle into the lower hopper, recovering the previously spilled dust and achieving energy saving and efficiency improvement. The lower hopper screen is foldable. On the one hand, it increases the filter area. On the other hand, the raised tip of the foldable filter is also conducive to directly breaking the agglomerated powder, without the need for manual shovel beating, and the material discharge is smooth. The cutter assembly can cut the side of the bag when the loading trolley pushes the turning table. After the bag pressing needle is inserted and fixed, the bag turning mechanism can turn the bag so that most of the powder in the bag falls into the lower hopper by its own gravity. The purge nozzle arranged in parallel with the bag pressing needle can be moved downward and inserted into the bag to purge the powder that has not fallen, thereby reducing the loss of auxiliary powder. In short, the closed feeding device of the utility model can control pollution and achieve cost reduction and consumption saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the closed feeding device in the embodiment;

[0022] Figure 2 It is a schematic diagram of the side structure of the track platform in the length direction in the embodiment;

[0023] Figure 3 It is a schematic diagram of the side structure of the track platform in the embodiment in the width direction;

[0024] Figure 4 for Figure 3 A magnified view of part A;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the track platform in the embodiment when viewed from above;

[0026] Figure 6 It is a schematic diagram of the structure of the loading trolley in the length direction in the embodiment;

[0027] Figure 7 It is a schematic diagram of the side structure of the feeding trolley in the width direction in the embodiment;

[0028] Figure 8This is a schematic diagram of the bottom structure of the loading trolley in the embodiment when viewed from above;

[0029] Fig. 9 It is a schematic diagram of the structure of the feeding trolley in the length direction inside the feeder in the embodiment;

[0030] Fig.10 This is a schematic diagram of the internal structure of the feeder from above in the embodiment;

[0031] Fig.11 It is a schematic diagram of the side view of the material bag fixing mechanism in the embodiment;

[0032] Fig.12 It is a schematic diagram of the side view of the filter, backflush system and baffle along the length direction of the trolley in the embodiment;

[0033] Fig.13 It is a schematic diagram of the structure of the filter, the backflush system and the baffle in the embodiment as viewed from the side along the width direction of the trolley;

[0034] Fig.14 It is a schematic diagram of the foldable screen structure in the lower hopper in the embodiment.

[0035] In the figure:

[0036] 1-track platform, 11-guide rail, 2-feeding trolley, 21-car plate, 22-wheel, 23-positioning piece, 231-groove, 3-feeding machine, 31-feeding port, 311-feeding door, 32-bag fixing mechanism, 321-bracket, 322-bag fixing cylinder, 323-mounting plate, 324-bag pressing needle, 33-bag turning mechanism, 331-turning table, 3311-elastic positioning wheel set, 332-drive shaft, 333-coupling , 334-servo motor reducer, 335-flip servo motor, 34-cutter assembly, 35-purge nozzle, 36-filter, 361-filter fan, 362-filter element, 371-nitrogen storage tank, 372-electromagnetic pulse valve, 373-aeration head, 374-pressure regulating valve, 381-baffle, 382-butterfly valve, 383-butterfly valve cylinder, 39-hopper, 391-screen, 4-guide roller, 5-bag pressing roller, 6-in-place contact switch. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present application, the present application will be described clearly and completely below in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0038] Example

[0039] Please refer to Figure 1 A closed feeding device comprises a rail platform 1, a feeding trolley 2 and a feeder 3.

[0040] Please refer to Figure 2-5 The upper surface of the track platform 1 is a plane with two parallel guide rails 11 in the length direction, which is supported by the platform bracket and is in the same horizontal plane as the feeding port 31 of the feeder 3. A guide roller 4 is also provided on one side of the two guide rails 11 on the upper surface of the track platform 1 to guide and adjust the position of the bag on the feeding trolley 2.

[0041] Please refer to Figure 6-8 The loading trolley 2 includes a vehicle plate 21, wheels 22 and a positioning member 23 installed below the vehicle plate 21. The material bag is directly placed on the vehicle plate 21 and is manually pushed along the guide rail 11 of the track platform 1 to the loading port 31 of the feeder 3. The positioning member 23 is a long rod-shaped structure with a groove 231 on the outer periphery. The positioning member 23 is used to fit and clamp with the elastic positioning wheel group 3311 of the material bag turning mechanism 33 after entering the preset position of the feeder 3 to fix the loading trolley 2.

[0042] Please refer to Figure 1 The feeder 3 is a closed box structure, and a feeding port 31 with a feeding door 311 is provided on the side wall, and the feeding port 31 is connected to one end of the track platform 1. A cutter assembly 34 is provided on one side of the feeder 3 near the feeding port, a lower hopper 39 is provided at the bottom of the feeder 3, and a bag turning mechanism 33 and a bag fixing mechanism 32 are provided above the lower hopper 39 in sequence, and a filter 36 and a back-blowing system 37 are provided on the top of the feeder 3.

[0043] Please refer to Figure 9-10 The bag turning mechanism 33 includes a turning table 331, a transmission shaft 332 and a turning servo motor 335. Among them, one end of the turning table 331 is connected to the track platform 1 at the position of the feeding port 31, and a bag pressing roller 5 is installed above the end close to the feeding port 31. Two rows of elastic positioning wheel groups 3311 are provided on the upper surface of the turning table 331 to cooperate with the positioning member 23 of the feeding trolley 2. When the positioning member 23 is inserted between the two rows of elastic positioning wheel groups 3311 and the positioning wheel group is stuck in the groove 231, the feeding trolley 2 reaches the predetermined position. The lower surface of the turning table 331 is fixedly connected to the transmission shaft 332. The transmission shaft 332 is connected to the turning servo motor 335 through a coupling 333. A servo motor reducer 334 is also connected between the coupling 333 and the turning servo motor 335.

[0044] The cutter assembly 34 is fixedly installed near the loading port 31 and is located on the upper side of the turning table 331 .

[0045] After the loading trolley 2 and the additive bag thereon are pushed into the feeder 3, the bag is pressed downward by the bag pressing roller 5 for a certain distance during the movement, so that the two sides of the bag bulge outward, and the blade head of the cutting knife assembly 34 installed on the side cuts the side of the bag due to the forward movement of the bag.

[0046] Please refer to Fig.11 Combination Fig. 9 The bag fixing mechanism 32 includes a bracket 321, a bag fixing cylinder 322, a mounting plate 323 and a bag pressing needle 324. The bag fixing cylinder 322 is mounted on the bracket 321 and can rotate relative to the bracket 321. The lower end of the bag fixing cylinder 322 is fixedly connected to the mounting plate 323. There are two rows of bag pressing needles 324, all of which are mounted below the mounting plate 323 with the needle tips facing downward.

[0047] In addition, a purge nozzle 35 is also installed on the mounting plate 323, the upper end of the purge nozzle 35 is connected to the purge gas source through a pipeline, and the lower end of the purge nozzle 35 is a beveled needle tube structure (similar to a syringe needle) for insertion into the bag for purging.

[0048] Please refer to Fig.12 and Fig.13 The filter 36 is equipped with a filter element 362 and a filter fan 361. The filter fan 361 provides negative pressure so that the filter element 362 of the filter can absorb the dust suspended in the air in the feeder. The filter element 362 is a polyester fiber air filter element, which uses two φ240*600 polyester fiber air filter elements, with a filtration accuracy of <3μm and a filtration area of ​​5.25m 2 , bearing pressure 2-2.5kpa, filtration efficiency 99%. The inlet of the filter fan 361 is arranged about 600mm above the lower hopper.

[0049] The backflush system includes a nitrogen tank 371, an electromagnetic pulse valve 372 and an aeration head 373 which are sequentially connected through pipelines, and a pressure regulating valve 374 is also provided on the connecting pipeline between the nitrogen tank 371 and the electromagnetic pulse valve 372. The electromagnetic pulse valve 372 controls the switch of the nitrogen tank 371. When the nitrogen tank 371 is turned on, compressed nitrogen is sprayed through the aeration head 373 to spray the filter element 362 of the filter to make the dust accumulated on the filter element 362 fall down.

[0050] A baffle 381 and a telescopic mechanism are also provided below the filter element 362 of the filter. The lower end of the baffle 381 is hinged to the inner wall of the feeder 3 through a hinge mechanism, and the upper end of the baffle 381 extends obliquely to the lower part of the filter element of the filter. The telescopic mechanism is fixedly mounted on the inner wall of the feeder, and includes a butterfly valve 382 and a butterfly valve cylinder 383. The butterfly valve 382 is connected to the baffle 381 and rotates the baffle 381 under the drive of the butterfly valve cylinder 383 to control the baffle 381 to rotate along the hinge mechanism, thereby rotating the upper end of the baffle 381 to the lower part of the filter element 362 or to leave the filter element 362 and approach the inner wall of the feeder.

[0051] Please refer to Fig.14 , a screen 391 is provided in the lower hopper 39, and the screen 391 is foldable with a folding angle of 90°. Conventional straight-plate screens generally have a mesh size of 4 per square inch, and a total flat plate area of ​​0.56 square meters. When pouring the auxiliary powder, because the auxiliary powder is lumped, it is necessary to use a shovel to break the lumps before the material can be discharged normally and enter the mixing bin at the bottom from the lower hopper. The foldable filter screen of this embodiment increases the filter area, and the filter area is 0.9 square meters. Because it is a foldable design, the auxiliary powder falls onto the screen, and the raised tip of the folded part of the screen will directly break the auxiliary lumps and fall into the mixing bin through the lower hopper. It is no longer necessary to manually knock the auxiliary lumps with a shovel, and the material discharge is smooth.

[0052] The operation of each mechanism in the feeder 3 of the closed feeding device is controlled by PLC (Programmable Logic Controller) or DCS (Distributed Control System). A closing contact switch is provided at the position of the feed door 311, and the closing contact switch is connected to the PLC or DCS; the feeder 3 is provided with an in-position contact switch 6 on the inner side wall near the position where the flip servo motor 335 is installed, and the in-position contact switch 6 is connected to the PLC or DCS; in addition, the driving components such as the bag fixing cylinder 322, the flip servo motor 335, the filter fan 361, the electromagnetic pulse valve 372, and the butterfly valve cylinder 383 are also connected to the PLC or DCS.

[0053] Working principle: Take PLC as an example of automatic control. First, put the additive bag on the feeding cart 2, and manually push the feeding cart 2 together with the bag from the feeding port 31 to the turning table 331 in the box of the feeder 3. Before feeding, the bag is arranged by the guide roller 4 so that the side of the bag is parallel to the forward direction. After feeding, the bag is rolled down by the bag pressing roller 5 to make the two sides of the bag bulge outward and get closer to the cutter assembly 34. The bag is cut by the cutter assembly 34 fixed in the box of the feeder 3, so that the bag is closed and cut in the feeder 3.

[0054] After the loading trolley 2 is pushed into place on the turning table 331, the positioning member 23 is engaged with the elastic positioning wheel set 3311 to fix the loading trolley 2 on the turning table 331. At the same time, the loading trolley 2 touches the in-place contact switch 6, and then the PLC triggers the bag fixing cylinder 322 to start working, driving the bag pressing needle 324 and the purge nozzle 35 to move downward and insert into the bag, fixing the bag on the loading trolley 2.

[0055] The feeding door 311 of the feeder 3 is closed, and the door closing contact switch installed on the door is triggered, and then the flip servo motor 335 is started through the PLC, driving the flip table 331, the loading trolley 2 fixed on the flip table 331, and the material bag fixed on the loading trolley 2 to flip 90 degrees together, so that the side opening of the material bag cut by the cutter assembly 34 is facing downward. When the flip servo motor 335 completes the automatic flipping of the material bag, after the set unloading time is reached, the switch of the purge air source is started to supply air to the purge nozzle 35 to blow away the remaining powder in the material bag. After completing the above-mentioned feeding process, the material bag rotates back to the initial position.

[0056] After the feed door 311 is closed and the door closing contact switch is triggered, the PLC also controls the filter fan 361 to start working so as to form a partial vacuum in the feeder 3 , and the dust floating in the air is adsorbed by the filter element 362 .

[0057] The filter element cleaning adopts a pneumatic pulse back-blowing system, and the timing of the purge is controlled by PLC. When the PLC signal is issued, the compressed nitrogen in the nitrogen storage tank 371 is quickly depressurized and sprayed out from the aeration head 373 through the electromagnetic pulse valve 372, and enters the filter element 362 for spraying and cleaning. The pulse back-blowing time of the filter element 362 is set to the filter fan 361 in the shutdown state, not less than 10 minutes, to ensure that the resistance drop of the filter 36 is effectively controlled.

[0058] When the filter fan 361 is started, the butterfly valve 382 is in a closed state, and the baffle 381 is close to the inner wall of the feeder 3; when the filter fan 361 is closed, the purge is started, and the butterfly valve 382 is opened, and the baffle 381 rotates to the bottom of the filter element 362, so that the dust attached to the filter element 362 is purged along the baffle 381 and returned to the additive silo through the lower hopper 39. The opening and closing of the butterfly valve 382 is controlled by the PLC. Alternatively, the lower end of the baffle 381 is directly connected to the additive silo, so that the blown powder returns to the additive silo.

[0059] The filter fan 361 configured for filter 36 is a medium-pressure fan of the type TB-125-3, power 2.2kw, full pressure 2400pa, flow rate 1980m3 / h, material: aluminum. It can effectively increase the suction vacuum and flow rate. The filter fan 361 is frequency conversion controlled, and the PLC is used to issue instructions to the frequency converter. The air volume is adjusted according to the use of the silo as follows:

[0060] A position switch (a door closing contact switch in this embodiment) is provided at each silo bag feeding position. When the door closing contact switch is triggered, the filter fan 361 is in full load working state.

[0061] When the door closing contact switch is reset, the bag is discharged and the machine enters the idle state (50% load). Once the door closing contact switch is triggered, the machine enters the normal state. The filter fan 361 will automatically shut down after 30 minutes of idle state.

[0062] Through the cooperation of the above-mentioned mechanisms, closed material discharge can be basically achieved, which can control pollution and reduce costs and save consumption.

[0063] The invention concept is described in detail using specific examples herein, and the description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that any obvious modification, equivalent substitution or other improvement made by a person skilled in the art without departing from the invention concept should be included in the protection scope of the utility model.

Claims

1. A closed feeding device, characterized in that: Including rail platform, loading trolley and feeder; The feeder is a box structure, the side wall of the feeder is provided with a feeding port with a feeding door, a cutting knife assembly is provided near the feeding port in the feeder, a lower hopper is provided at the bottom of the feeder, and a bag turning mechanism and a bag fixing mechanism are provided above the lower hopper inside the feeder; The loading trolley supports the material bag and is pushed into the loading port along the rail platform and is received by the material bag flipping mechanism. During the pushing process, the material bag is cut open by the cutting knife assembly. After it is fully pushed in, the feed door is closed, and the material bag fixing mechanism fixes the material bag and the loading trolley on the material bag flipping mechanism. The material bag flipping mechanism flips the loading trolley and the material bag fixing mechanism together by 90° to realize closed feeding.

2. The device according to claim 1, characterized in that The rail platform is also provided with a guide roller, which is used to adjust the side of the material bag on the loading trolley to be parallel to the moving direction of the loading trolley when the loading trolley moves toward the feeder; the feeder is also provided with a bag pressing roller near the loading port, which is used to press the material bag downward when the loading trolley is pushed into the loading port so that the two sides of the material bag expand and are closer to the cutting knife assembly to be cut open.

3. The device according to claim 1, characterized in that A filter is also arranged on the top of the feeder. The filter is equipped with a filter element and a filter fan. The filter fan provides negative pressure so that the filter element of the filter can absorb the dust suspended in the air in the feeder.

4. The device according to claim 3, characterized in that The feeder is also provided with a backflush system, which includes a nitrogen storage tank, an electromagnetic pulse valve and an aeration head which are sequentially connected through pipelines. The electromagnetic pulse valve controls the switch of the nitrogen storage tank. When the nitrogen storage tank is turned on, compressed nitrogen is sprayed out through the aeration head to spray the filter element of the filter to make the dust accumulated on the filter element fall.

5. The device according to claim 4, characterized in that The feeder is also provided with a baffle and a telescopic mechanism. The lower end of the baffle is hinged to the inner wall of the feeder through a hinge mechanism, and the upper end of the baffle extends obliquely to below the filter element of the filter; the telescopic mechanism is fixedly installed on the inner wall of the feeder to control the baffle to rotate along the hinge mechanism and then control the upper end of the baffle to rotate to below the filter element or to rotate away from the filter element and close to the inner wall of the feeder.

6. The device according to claim 5, characterized in that The telescopic mechanism comprises a butterfly valve and a butterfly valve cylinder. The butterfly valve is connected to the baffle and rotates the baffle under the drive of the butterfly valve cylinder.

7. The device according to claim 1, characterized in that A screen is arranged in the lower hopper, and the screen is foldable with a folding angle of 90°.

8. The device according to any one of claims 1 to 7, characterized in that: The material bag fixing mechanism includes a bracket, a material bag fixing cylinder, a mounting plate and a bag pressing needle. The material bag fixing cylinder is installed on the bracket and can rotate relative to the bracket. The lower end of the material bag fixing cylinder is fixedly connected to the mounting plate. The bag pressing needle is installed below the mounting plate with the needle tip facing downward; the material bag fixing cylinder drives the bag pressing needle to move downward and insert into the material bag to fix the material bag on the loading trolley.

9. The device according to claim 8, characterized in that A purge nozzle is also installed on the mounting plate, the upper end of the purge nozzle is connected to a purge gas source through a pipeline, and the lower end of the purge nozzle is a bevel needle tube structure for being inserted into the material bag for purging.

10. The device according to any one of claims 1 to 7, characterized in that: The material bag turning mechanism includes a turning table, a transmission shaft and a turning servo motor. The upper surface of the turning table is provided with two rows of elastic positioning wheel groups, and the lower surface of the turning table is fixedly connected to the transmission shaft; the lower surface of the loading trolley is fixedly installed with a positioning piece with grooves on both sides; the loading trolley is pushed to the turning table of the material bag turning mechanism, the positioning piece is inserted between the two rows of elastic positioning wheel groups and the positioning wheel groups are stuck in the grooves to reach the predetermined position; the turning servo motor drives the turning table together with the loading trolley and the material bag fixed on the turning table by the material bag fixing mechanism to turn 90°.

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