CN209945526U

CN209945526U - A full-automatic sampling weighing system for EPS foam particle

Info

Publication number: CN209945526U
Application number: CN201920939961.7U
Authority: CN
Inventors: 李莽; 刘路; 王赛; 陈彦松; 丁佳; 魏利杰; 宋亚豪; 王立亚; 翟家栋
Original assignee: Hebei Xuelong Technology Development Co Ltd
Current assignee: Hebei Xuelong Technology Development Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-01-14
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a full-automatic sample weighing system for EPS foam particle belongs to weighing equipment technical field, weighing system includes the sampler, and the ware of weighing, the sampler is including setting up in the drying bed and having fixed volume's sampling box, the material receiving box of setting between the feed inlet of drying bed and sampling box, and telescopic machanism, the material receiving box makes the material receiving mouth at material receiving box top and the feed inlet intercommunication of drying bed with the help of telescopic machanism's flexible, perhaps make the bin outlet of material receiving box bottom and the import intercommunication of sampling box, hot-blast import has been seted up on the lateral wall of sampling box, top in the sampling box is provided with the sample switch that targets in place, the exit of sampling box bottom is provided with the sample discharge valve, the bin outlet department of material receiving box bottom is provided with the discharge valve. Directly sample the constant volume in the dry bed, the foam particle volume of final constant volume can not dwindle like this, and the weight precision of weighing is showing and is increasing, and the actual density accuracy degree of the EPS foam particle who reachs at last is higher.

Description

A full-automatic sampling weighing system for EPS foam particle

Technical Field

The utility model belongs to the technical field of weighing-appliance, a full-automatic sample weighing system, especially a full-automatic sample weighing system for EPS foam particle is related to.

Background

The EPS foaming is that, be provided with the photoelectric switch who observes EPS foam in the foaming tank at the glass window department of foaming tank, during production drop into the EPS granule of fixed weight in the foaming tank, the expansion that foams continuously of EPS granule in the foaming process, therefore the height of EPS foam granule constantly rises in the foaming tank, when rising to photoelectric switch's detection position, is detected by photoelectric switch promptly to the photoelectric switch action stops heating, foaming, accomplishes a foaming process. Theoretically, the weight of the fed materials is fixed, and the volume of the foamed foam can be detected, so that the density of the product can be calculated. However, steam needs to be continuously introduced in the foaming process to stir the foam plastic particles, the foam particles are in a boiling-like state in the foaming tank, and the particles continuously roll in the tank, so that the measurement of the real volume of the foam plastic particles is very difficult, and the measured value has great deviation.

The sampling and weighing system on the market at present utilizes a sampler to directly extract products when EPS foam particles fall into a drying bed from a foaming tank after the foaming of the EPS foam particles is finished, performs constant volume in a room temperature environment completely different from the high temperature and high humidity in the drying bed, and then utilizes a weighing mechanism to measure the weight of the products under the volume, so as to obtain the density of the products by the method. Because the volume of the EPS foam particles changes at different temperatures due to the characteristics of the EPS foam particles, the EPS foam particles tend to shrink in a room temperature environment, which results in that more EPS foam particles are actually required to fill the container for constant volume when the volume is constant, which also results in that the final weight is higher than the actual value. Therefore, the existing equipment on the market has the problem that the actual density of the EPS foam particles in the production equipment is difficult to accurately measure. The actual density of the EPS foam particles is closely related to the density and weight of the final product EPS insulation board, and the quality of the EPS insulation board is concerned, so the difficult problem needs to be solved.

Disclosure of Invention

The utility model discloses an overcome prior art's defect, designed a full-automatic sample weighing system for EPS foam particle, directly sample the constant volume in the drying bed, the foam particle volume of last constant volume can not dwindle like this, and the weight precision of weighing is showing and is increasing, does not have the deviation basically, and the EPS foam particle's that reachs at last actual density degree of accuracy is higher.

The utility model adopts the following specific technical proposal: the utility model provides a full-automatic sample weighing system for EPS foam particle, includes the sampler of drawing the sample from the foaming tank and weigh the weighing device of sample weight, and the discharge gate of foaming tank is connected with the feed inlet of dry bed, and the key lies in: the sampler comprises a sampling box which is arranged in a drying bed and has a fixed volume, a material receiving box which is arranged between a feeding hole of the drying bed and the sampling box, and a telescopic mechanism which is horizontally arranged in the drying bed, one end of the telescopic mechanism is fixedly connected with the drying bed, the other end of the telescopic mechanism is fixedly connected with the material receiving box, the material receiving box enables a material receiving hole at the top of the material receiving box to be communicated with the feeding hole of the drying bed by means of the telescopic mechanism, or enables a material discharging hole at the bottom of the material receiving box to be communicated with an inlet of the sampling box, an outlet of the sampling box is connected with an inlet of a weighing device arranged outside the drying bed, a group of hot air inlets which are communicated with the inside of the drying bed are arranged on the side wall of the sampling box, a sampling in-place switch which is connected with a controller is arranged at the top in the sampling box, a sample discharging valve is, the output end of the controller is simultaneously connected with the telescopic mechanism, the discharge valve and the sample discharge valve.

An air inlet valve is arranged at the top of the material receiving box, the air inlet valve is connected with an outlet of a hot air system arranged outside the drying bed, and the controlled end of the air inlet valve is connected with a controller.

The outlet of the sampling box is connected with the inlet of the weighing device by means of a feeding pipe, the feeding pipe comprises a horizontal pipe and a 90-degree elbow, the upper end of the elbow is connected with the sampling box, the lower end of the elbow is connected with the inlet of the horizontal pipe, the outlet of the horizontal pipe penetrates through the side wall of the drying bed and is connected with the inlet of the weighing device, one side of the elbow, which is far away from the horizontal pipe, is connected with a compressed air interface, the inlet of the compressed air interface is connected with an air compressor arranged outside the drying bed, and the compressed air interface and the horizontal pipe are coaxially arranged.

The material receiving box is internally provided with a guide cylinder, the diameter of the guide cylinder is sequentially reduced from top to bottom, a material receiving opening of the material receiving box is communicated with the upper end of the guide cylinder, and the lower end of the guide cylinder is communicated with a material outlet of the material receiving box.

The weighing device comprises a support, a weight sensor fixed on the support and a weighing barrel erected above the weight sensor, wherein an inlet of the weighing barrel is connected with an outlet of the sampling box, a support ring is fixed at an outlet of the weighing barrel, a partition plate is inserted on the support ring, a telescopic cylinder is fixed on the support, the partition plate is fixedly connected with the telescopic cylinder, and the partition plate and the outlet of the weighing barrel are sealed to form a material receiving mechanism or are separated to form a material discharging mechanism by virtue of the expansion of the telescopic cylinder.

The weighing device further comprises a blanking barrel fixedly connected with the support and located above the weighing barrel, an inlet at the upper end of the blanking barrel is connected with an outlet of the sampling box, an outlet at the bottom of the blanking barrel is communicated with an inlet at the top of the weighing barrel, and a compressed air inlet is formed in the top of the blanking barrel.

The support is a frame structure formed by surrounding a vertical pipe and a transverse pipe, a supporting seat is arranged below the vertical pipe, and an adjusting screw rod is fixed on the supporting seat and in threaded connection with the vertical pipe.

The adjusting screw is connected with a supporting nut in a threaded manner, and the lower end face of the vertical pipe is in close contact with the upper end face of the supporting nut.

The utility model has the advantages that: set up sampling box and material receiving box in the dry bed, utilize telescopic machanism's flexible position of adjusting material receiving box, be in the closed condition when the blow off valve, when the material receiving mouth at material receiving box top and the feed inlet intercommunication of dry bed, the EPS foam particle that falls down in the expansion tank then can fall into in the material receiving box through the material receiving mouth, when the material receiving mouth at material receiving box top and the feed inlet separation of dry bed and the bin outlet of material receiving box bottom and the import intercommunication of sampling box, open the blow off valve, the EPS foam particle in the material receiving box then can pass through the bin outlet and enter into in the sampling box, after EPS foam particle in the material receiving box discharges and accomplishes, utilize telescopic machanism to make the material receiving mouth at material receiving box top communicate with the feed inlet of dry bed once more, connect the material once more, then discharge the EPS foam particle in the material receiving box once more in the sampling.

Along with the increase of row material number of times, the height of EPS foam particle in the sampling box constantly rises, when rising to sample the switch detection position that targets in place, sample the switch that targets in place and send signal to the controller, and the controller makes the blow-off valve close, accomplishes a sampling process. And after sampling, conveying the EPS foam particles in the sampling box into a weighing device, and weighing. Whole sample constant volume process all goes on in the drying bed, and the hot-blast import of seting up on the sampling box lateral wall makes the temperature of sampling box inside keep unanimous with the temperature in the drying bed, and the foam particle volume of last constant volume can not dwindle like this, and the weight precision of weighing is showing the increase, does not basically have the deviation, and the actual density degree of accuracy of the EPS foam particle who reachs at last is higher, can improve the quality of EPS heated board.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a in fig. 1.

Fig. 3 is an enlarged view of B in fig. 1.

Fig. 4 is an enlarged view of C in fig. 1.

In the attached drawings, 1 represents a drying bed, 2 represents a sampling box, 3 represents a material receiving box, 3-1 represents a material receiving opening, 3-2 represents a material discharging opening, 3-3 represents an air inlet valve, 4 represents a support, 4-1 represents a vertical pipe, 4-2 represents a transverse pipe, 5 represents a telescopic mechanism, 6 represents a hot air inlet, 7 represents a guide cylinder, 8 represents a horizontal pipe, 9 represents an elbow, 10 represents a compressed air interface, 11 represents a weight sensor, 12 represents a weighing barrel, 13 represents a support ring, 14 represents a partition plate, 14-1 represents a horizontal plate, 14-2 represents a first vertical plate, 14-3 represents a second vertical plate, 14-4 represents a positioning ring, 15 represents a telescopic cylinder, 16 represents a material dropping barrel, 17 represents a compressed air inlet, 18 represents a support seat, 19 represents an adjusting screw rod, and 20 represents a support nut.

Detailed Description

The present invention will be described in detail with reference to the following drawings and specific embodiments:

in the specific embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, a full-automatic sampling and weighing system for EPS foam particles comprises a sampler for extracting a sample from a foaming tank and a weighing device for weighing the sample, wherein a discharge port of the foaming tank is connected with a feed port of a drying bed 1, the sampler comprises a sampling box 2 which is arranged in the drying bed 1 and has a fixed volume, a material receiving box 3 which is arranged between the feed port of the drying bed 1 and the sampling box 2, and a telescoping mechanism 5 which is horizontally arranged in the drying bed 1, one end of the telescoping mechanism 5 is fixedly connected with the drying bed 1, the other end of the telescoping mechanism 5 is fixedly connected with the material receiving box 3, the material receiving box 3 makes a material receiving port 3-1 at the top of the material receiving box 3 communicate with the feed port of the drying bed 1 by means of the telescoping mechanism 5, or makes a material discharge port 3-2 at the bottom of the material receiving box 3 communicate with an inlet, the outlet of the sampling box 2 is connected with the inlet of a weighing device arranged outside the drying bed 1, the side wall of the sampling box 2 is provided with a group of hot air inlets 6 communicated with the inside of the drying bed 1, the top inside the sampling box 2 is provided with a sampling in-place switch connected with a controller, the sampling in-place switch is a photoelectric switch, the outlet at the bottom of the sampling box 2 is provided with a sample discharge valve, the discharge port 3-2 at the bottom of the material receiving box 3 is provided with a discharge valve, and the output end of the controller is simultaneously connected with the telescopic mechanism 5, the discharge valve and the sample discharge valve. The controller can be a programmable controller PLC.

As a further improvement of the utility model, an air inlet valve 3-3 is arranged on the top of the material receiving box 3, the air inlet valve 3-3 is connected with the outlet of a hot air system arranged outside the drying bed 1, and the controlled end of the air inlet valve 3-3 is connected with a controller. The hot air system conveys hot air into the material receiving box 3 through the air inlet valve 3-3, and the EPS foam particles in the material receiving box 3 are heated and insulated, so that the temperature of the EPS foam particles in the material receiving box 3 can be kept consistent with that of the drying bed 1, the EPS foam particles are prevented from shrinking due to temperature difference, and the accuracy of sampling and constant volume can be further improved.

As right the utility model discloses a further improvement, the export of sampling box 2 is with the help of the access connection of conveying pipe and weighing device, the conveying pipe includes horizontal pipe 8 and 90 elbow 9, elbow 9's upper end is connected with sampling box 2, elbow 9's lower extreme and horizontal pipe 8's access connection, drying bed 1's lateral wall and the access connection of weighing device are passed in horizontal pipe 8's export, one side of keeping away from horizontal pipe 8 at elbow 9 is connected with compressed air interface 10, compressed air interface 10's import and setting are connected at the outside air compressor of drying bed 1, compressed air interface 10 and the coaxial setting of horizontal pipe 8. As shown in figure 1, compressed air in the air compressor enters the horizontal pipe 8 through the compressed air interface 10, EPS foam particles falling into the horizontal pipe 8 can be blown into the weighing device quickly, conveying efficiency can be improved, EPS foam particles remaining in the feeding pipe can be avoided, and accuracy of weighing data is ensured.

As a further improvement of the utility model, a guide cylinder 7 is arranged in the material receiving box 3, the diameter of the guide cylinder 7 is reduced from top to bottom in turn, a material receiving opening 3-1 of the material receiving box 3 is communicated with the upper end of the guide cylinder 7, and the lower end of the guide cylinder 7 is communicated with a material discharging opening 3-2 of the material receiving box 3. Utilize draft tube 7 to make the EPS foam particle in the material receiving box 3 can slide into in the sample case 2 fast, can avoid having residual material in the material receiving box 3 simultaneously, all can discharge the material in the material receiving box 3 totally at every turn.

As right the utility model discloses a further improvement, the weighing machine includes support 4, fixes weight sensor 11 on support 4 and erects the weighing bucket 12 in weight sensor 11 top, and the weighing machine adopts the weight sensor 11 of C3 level precision, and the weighing precision can reach 0.01% F.S, and the error of weighing is 11 the full scale of weight sensor +/-0.01 promptly. An inlet of the weighing barrel 12 is connected with an outlet of the sampling box 2, an outlet of the weighing barrel 12 is fixed with a support ring 13, a partition plate 14 is inserted on the support ring 13, a telescopic cylinder 15 is fixed on the support 4, the partition plate 14 is fixedly connected with the telescopic cylinder 15, and the partition plate 14 is sealed with the outlet of the weighing barrel 12 by virtue of the expansion and contraction of the telescopic cylinder 15 to form a material receiving mechanism or is separated to form a material discharging mechanism. As shown in fig. 1, the partition 14 is located below the outlet of the weighing barrel 12, the telescopic cylinder 15 extends to seal the partition 14 and the outlet of the weighing barrel 12 to form a material receiving mechanism, the EPS foam particles contained in the sampling box 2 enter the weighing barrel 12, the weight sensor 11 measures the weight value obtained after the EPS foam particles enter the weighing barrel 12, and the weight value obtained by subtracting the weight value before the EPS foam particles enter the weighing barrel 12, and the obtained difference value is the weight of the EPS foam particles. After weighing is finished, the telescopic cylinder 15 contracts to separate the partition plate 14 from the outlet of the weighing barrel 12, EPS foam particles in the weighing barrel 12 can be discharged, after discharging is finished, the telescopic cylinder 15 extends to enable the partition plate 14 and the outlet of the weighing barrel 12 to be sealed to form a material receiving mechanism, and the next material receiving weighing is ready to be carried out.

As shown in fig. 4, the partition plate 14 includes a horizontal plate 14-1, one end of the horizontal plate 14-1 is inserted into the support ring 13, a first vertical plate 14-2 and a second vertical plate 14-3 are fixed below the other end of the horizontal plate 14-1, a cavity between the first vertical plate 14-2 and the second vertical plate 14-3 is a positioning cavity, a positioning ring 14-4 is fixed at an end of the telescopic cylinder 15, and the positioning ring 14-4 is inserted into the positioning cavity to fixedly connect the partition plate 14 and the telescopic cylinder 15. When the telescopic device is installed, the positioning ring 14-4 is firstly inserted into the positioning cavity, then the telescopic cylinder 15 is extended, and the horizontal plate 14-1 is inserted into the supporting ring 13; when the telescopic cylinder 15 is disassembled, the telescopic cylinder 15 is contracted to separate the horizontal plate 14-1 from the support ring 13, and then the positioning ring 14-4 is separated from the positioning cavity. In order to save labor during assembly and disassembly, the distance between the first vertical plate 14-2 and the second vertical plate 14-3 is larger than the thickness of the positioning ring 14-4 along the axial direction.

The weighing device further comprises a blanking barrel 16 which is fixedly connected with the support 4 and is positioned above the weighing barrel 12, an inlet at the upper end of the blanking barrel 16 is connected with an outlet of the sampling box 2, an outlet at the bottom of the blanking barrel 16 is communicated with an inlet at the top of the weighing barrel 12, and a compressed air inlet 17 is formed in the top of the blanking barrel 16. The EPS foam particles contained in the sampling box 2 enter the weighing barrel 12 through the blanking barrel 16, a compressed air inlet 17 is connected with an air compressor during use, after weighing is completed, the telescopic cylinder 15 contracts to separate the partition plate 14 from an outlet of the weighing barrel 12, and meanwhile, compressed air in the air compressor enters the inside of the weighing barrel 12 in the blanking barrel 16 through the compressed air inlet 17 to be cleaned, so that the EPS foam particles in the weighing barrel 12 can be blown out quickly, and the influence on the accuracy of next weighing caused by residual particles in the weighing barrel 12 is avoided. After the material discharging is completed, the expansion cylinder 15 extends to enable the partition plate 14 and the outlet of the weighing barrel 12 to be sealed to form a material receiving mechanism, the air compressor is closed at the same time, the next material receiving weighing is ready, the structure is simple, the operation is convenient, and the weighing obtained data are more accurate.

As shown in fig. 3, the support 4 is a frame structure defined by a vertical pipe 4-1 and a horizontal pipe 4-2, a support seat 18 is disposed below the vertical pipe 4-1, an adjusting screw 19 is fixed on the support seat 18, and the adjusting screw 19 is in threaded connection with the vertical pipe 4-1. Can adjust the height of support 4 through rotatory adjusting screw 19 to adjust the height of weighing bucket 12, in order to satisfy different user demands, simple structure, convenient operation is swift, labour saving and time saving. A support nut 20 is connected to the adjusting screw rod 19 in a threaded manner, and the lower end face of the vertical tube 4-1 is in close contact with the upper end face of the support nut 20. After the height of the support 4 is adjusted, the upper end face of the support nut 20 is in close contact with the lower end face of the vertical pipe 4-1, and the support nut 20 can play a role of supporting the support 4, so that the support 4 is connected with the support seat 18 more firmly and reliably, and the safety is better.

The utility model discloses when specifically using, sampling box 2 is located one side of the feed inlet of dry bed 1 and is located dry bed 1, as shown in fig. 1, sampling box 2 is located the left side of the feed inlet of dry bed 1, sampling box 2's top is provided with material receiving box 3 in dry bed 1, telescopic machanism 5 is located material receiving box 3 left side, telescopic machanism 5's left end and 1 fixed connection of dry bed, telescopic machanism 5's right-hand member and 3 fixed connection of material receiving box, material receiving box 3 has the horizontal migration degree of freedom along the left and right sides direction with the help of telescopic machanism 5's flexible. As shown in figure 2, a material receiving port 3-1 is arranged at the right end of the top of the material receiving box 3, a material discharging port 3-2 is arranged at the bottom of the material receiving box 3, the material discharging port 3-2 is positioned at the left side of the material receiving port 3-1, and the weighing device is positioned at the left side of the drying bed 1. The left end of the horizontal pipe 8 is connected with the inlet on the right side of the upper end of the blanking barrel 16, the right end of the horizontal pipe 8 is connected with the lower end of the elbow 9, the upper end of the elbow 9 is connected with the sampling box 2, and the compressed air interface 10 is positioned on the right side of the elbow 9. As shown in fig. 2, the hot air inlet 6 is a vertically arranged elongated hole, which not only allows hot air to enter the sampling box 2, but also prevents EPS foam particles in the sampling box 2 from flowing out.

During sampling, as shown in fig. 1 and fig. 2, at this time, the telescopic mechanism 5 is extended, the material receiving opening 3-1 of the material receiving box 3 is just below the material inlet of the drying bed 1, the material receiving box 3 is in a material receiving state, and at this time, the discharge valve at the discharge opening 3-2 of the material receiving box 3 is closed. In order to facilitate the EPS foam particles to fall into the material receiving box 3, the diameter of the material receiving opening 3-1 is larger than that of the material inlet of the drying bed 1. EPS foam particles in the foaming tank fall into the material receiving box 3 through a feed inlet of the drying bed 1 and a material receiving port 3-1 of the material receiving box 3 in sequence. For setting the material receiving time, the extension time of the telescopic mechanism 5 each time can be directly set through a controller, and the telescopic mechanism 5 automatically contracts after the set time is reached; the top in the material receiving box 3 can also be provided with a material receiving in-place switch which is also a photoelectric switch, when the height of EPS foam particles in the material receiving box 3 rises to the detection position of the material receiving in-place switch, the material receiving in-place switch sends a signal to the controller, and the controller enables the telescopic mechanism 5 to contract to complete the material receiving process.

When the telescopic mechanism 5 is contracted to return to the initial position, the material receiving opening 3-1 at the top of the material receiving box 3 deviates from the material inlet of the drying bed 1, the material discharging opening 3-2 at the bottom of the material receiving box 3 is just communicated with the inlet at the top of the sampling box 2, the controller enables the material discharging valve at the material discharging opening 3-2 to be opened to enter a material discharging state, and EPS foam particles in the material receiving box 3 fall into the sampling box 2 after passing through the material discharging opening 3-2, the material discharging valve and the inlet of the sampling box 2. Because the volume of the material receiving box 3 is fixed, the time required by discharging materials every time is also fixed, when the discharging time reaches the set time, the controller sends a signal to close the discharging valve, and simultaneously, the telescopic mechanism 5 extends to enable the material receiving opening 3-1 of the material receiving box 3 to just reach the position right below the feeding opening of the drying bed 1, as shown in fig. 1, the material receiving box 3 enters the material receiving state again, then enters the material discharging state again, and the process is repeated.

Along with the increase of row material number of times, the height of EPS foam particle constantly rises in sampling box 2, when rising to sample the switch detection position that targets in place, sample the switch that targets in place and send signal for the controller, and the controller makes the blow-off valve close, accomplishes a sampling process. Meanwhile, the controller sends a signal to open the sample discharge valve, the EPS foam particles which are well defined in the sampling box 2 enter the weighing device through the sample discharge valve and the feeding pipe, and the weighing device weighs the EPS foam particles which are well defined in volume.

Whole sample constant volume process is gone on in the dry bed 1, and the hot-blast import 6 of seting up on the 2 lateral walls of sampling case makes the temperature of 2 inside of sampling cases and the temperature of 1 inside of dry bed keep unanimous all around 60 ℃, and the foam particle volume of last constant volume can not dwindle like this, and the weight precision of weighing is showing and is increasing, does not basically have the deviation, and the actual density degree of accuracy of the EPS foam particle who reachs at last is higher.

Claims

1. The utility model provides a full-automatic sample weighing system for EPS foam particle, includes the sampler of drawing the sample from the foaming tank and weigh the weighing device of sample weight, and the discharge gate of foaming tank is connected its characterized in that with the feed inlet of dry bed (1): the sampler comprises a sampling box (2) which is arranged in a drying bed (1) and has a fixed volume, a material receiving box (3) which is arranged between a feeding hole of the drying bed (1) and the sampling box (2), and a telescopic mechanism (5) which is horizontally arranged in the drying bed (1), wherein one end of the telescopic mechanism (5) is fixedly connected with the drying bed (1), the other end of the telescopic mechanism is fixedly connected with the material receiving box (3), the material receiving box (3) enables the material receiving hole (3-1) at the top of the material receiving box (3) to be communicated with the feeding hole of the drying bed (1) or enables the material discharging hole (3-2) at the bottom of the material receiving box (3) to be communicated with the inlet of the sampling box (2) by means of the telescopic mechanism (5), the outlet of the sampling box (2) is connected with the inlet of a weighing device which is arranged outside the drying bed (1), a group of hot air inlets (6) which are communicated with the inside of the drying bed (1) is arranged on the side, the top in the sampling box (2) is provided with a sampling in-place switch connected with a controller, the outlet at the bottom of the sampling box (2) is provided with a sample discharge valve, the discharge port (3-2) at the bottom of the material receiving box (3) is provided with a discharge valve, and the output end of the controller is simultaneously connected with the telescopic mechanism (5), the discharge valve and the sample discharge valve.

2. A fully automatic sampling and weighing system for EPS foam particles according to claim 1, characterized in that: an air inlet valve (3-3) is arranged at the top of the material receiving box (3), the air inlet valve (3-3) is connected with an outlet of a hot air system arranged outside the drying bed (1), and the controlled end of the air inlet valve (3-3) is connected with a controller.

3. A fully automatic sampling and weighing system for EPS foam particles according to claim 1, characterized in that: the export of sampling box (2) with the help of the access connection of conveying pipe and weighing device, the conveying pipe includes horizontal pipe (8) and 90 elbow (9), the upper end and the sampling box (2) of elbow (9) are connected, the lower extreme of elbow (9) and the access connection of horizontal pipe (8), the export of horizontal pipe (8) passes the lateral wall of drying bed (1) and the access connection of weighing device, one side of keeping away from horizontal pipe (8) in elbow (9) is connected with compressed air interface (10), the import and the air compressor who sets up in drying bed (1) outside of compressed air interface (10) are connected, compressed air interface (10) and horizontal pipe (8) coaxial setting.

4. A fully automatic sampling and weighing system for EPS foam particles according to claim 1, characterized in that: a guide cylinder (7) is arranged in the material receiving box (3), the diameter of the guide cylinder (7) is sequentially reduced from top to bottom, a material receiving opening (3-1) of the material receiving box (3) is communicated with the upper end of the guide cylinder (7), and the lower end of the guide cylinder (7) is communicated with a material discharging opening (3-2) of the material receiving box (3).

5. A fully automatic sampling and weighing system for EPS foam particles according to claim 1, characterized in that: the weighing device comprises a support (4), a weight sensor (11) fixed on the support (4) and a weighing barrel (12) erected above the weight sensor (11), wherein an inlet of the weighing barrel (12) is connected with an outlet of the sampling box (2), an outlet of the weighing barrel (12) is fixed with a support ring (13), a partition plate (14) is inserted on the support ring (13), a telescopic cylinder (15) is fixed on the support (4), the partition plate (14) is fixedly connected with the telescopic cylinder (15), and the partition plate (14) is sealed with the outlet of the weighing barrel (12) by virtue of the expansion and contraction of the telescopic cylinder (15) to form a material receiving mechanism or is separated to form a material discharging mechanism.

6. A fully automatic sampling and weighing system for EPS foam particles according to claim 5, characterized in that: the weighing device further comprises a charging barrel (16) which is fixedly connected with the support (4) and is positioned above the weighing barrel (12), an inlet at the upper end of the charging barrel (16) is connected with an outlet of the sampling box (2), an outlet at the bottom of the charging barrel (16) is communicated with an inlet at the top of the weighing barrel (12), and a compressed air inlet (17) is formed in the top of the charging barrel (16).

7. A fully automatic sampling and weighing system for EPS foam particles according to claim 5, characterized in that: the support (4) is a frame structure formed by enclosing a vertical pipe (4-1) and a transverse pipe (4-2), a supporting seat (18) is arranged below the vertical pipe (4-1), an adjusting screw rod (19) is fixed on the supporting seat (18), and the adjusting screw rod (19) is in threaded connection with the vertical pipe.

8. A fully automatic sampling and weighing system for EPS foam particles according to claim 7, characterized in that: a supporting nut (20) is connected to the adjusting screw rod (19) in a threaded manner, and the lower end face of the vertical pipe (4-1) is in close contact with the upper end face of the supporting nut (20).