Negative-pressure powder conveying equipment

Abstract

The utility model relates to powder negative pressure conveying equipment which comprises a vertically-arranged feeding bin, a discharging opening is formed in the bottom of the feeding bin, a first switch valve is installed on the discharging opening of the feeding bin, and the discharging opening of the feeding bin is further communicated with a horizontally-arranged first sealing conveying device. A discharging port is formed in the end, away from the feeding bin, of the first sealed material conveying device, a second switch valve is installed on the discharging port of the first sealed material conveying device, the end, close to the feeding bin, of the first sealed material conveying device communicates with a negative pressure device, and the negative pressure device comprises a first air conveying pipe communicating with the first sealed material conveying device. One end, far away from the first sealed material conveying device, of the first gas conveying pipe is communicated with an exhaust fan, a filter bag filter is mounted on the first gas conveying pipe, and when the powder feeding device is used, the condition that the discharge port of the feeding bin is blocked can be reduced, so that powder can be conveniently discharged into the first sealed material conveying device.

Description

Technical Field

[0001] The utility model belongs to the technical field of conveying equipment, in particular to a powder negative pressure conveying equipment. Background Art

[0002] At present, powder is required as raw material in the production of hot melt sealant. In the existing technology, the powder is usually packaged in ton bags. In this way, during the storage of the powder, it is easily affected by the surrounding environment, which will cause the powder to clump and stick together, that is, the dispersibility of the powder is reduced. Then, when the powder is transported by conveying equipment, when the powder is discharged from the silo, the discharge port of the silo is easily blocked, which makes it inconvenient to discharge the powder into the conveying equipment. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0003] The purpose of the present invention is to provide a powder negative pressure conveying device to solve the problems raised in the above background technology.

[0004] In order to solve the above problems, the technical solutions adopted by this utility model are as follows:

[0005] A negative pressure conveying device for powder material comprises a vertically arranged feeding silo, and is characterized in that: a discharge port is provided at the bottom of the feeding silo, and a first switch valve is installed on the discharge port of the feeding silo, and the discharge port of the feeding silo is also connected to a horizontally arranged first sealed feeding device, a discharge port is provided at the end of the first sealed feeding device away from the feeding silo, a second switch valve is installed on the discharge port of the first sealed feeding device, and the end of the first sealed feeding device close to the feeding silo is connected to a negative pressure device, the negative pressure device comprises a first air supply pipe connected to the first sealed feeding device, the end of the first air supply pipe away from the first sealed feeding device is connected to an exhaust fan, and a filter bag filter is installed on the first air supply pipe.

[0006] Furthermore, it also includes a vertically arranged feeding bin, which is lower than the loading bin, and an agitator is installed in the feeding bin, a discharge port is provided at the bottom of the feeding bin, and a fourth switch valve is installed on the discharge port of the feeding bin, the discharge port of the feeding bin is also connected to a horizontally arranged second sealed feeding device, the end of the second sealed feeding device away from the feeding bin is connected to a vertically distributed first sealed loading device, the top of the first sealed loading device is provided with a discharge port, and the discharge port of the first sealed loading device is connected to a horizontally arranged second sealed loading device, and a feeding pipe with a switch valve is connected between the second sealed loading device and the loading bin.

[0007] Furthermore, the first sealed feeding device includes two circular shells with a cavity structure, and two vertically oppositely arranged feeding circular tubes are fixedly connected between the two circular shells, and the two circular shells are respectively connected to the second sealed feeding device and the second sealed feeding device, and the two circular shells are also coaxially connected to transmission wheels, one of which is connected to a driving motor installed outside the circular shell, and an annular rope that passes through the feeding circular tubes is installed between the two transmission wheels, and a plurality of feeding discs that are evenly distributed along the circumference of the annular rope and adapted to the feeding circular tube are fixedly sleeved on the annular rope; each transmission wheel is provided with a plurality of notches that are evenly distributed along the circumference of the transmission wheel and opposite to the position of the feeding disc.

[0008] Furthermore, the second sealing loading device has the same structure as the first sealing loading device, and the second sealing loading device is lower than the discharge port of the first sealing loading device and is connected to the first sealing loading device through a feeding hose.

[0009] Furthermore, a drying box is connected between the feeding bin and the second sealed feeding device, a stirring device is installed in the drying box, and a seventh switch valve is installed on the discharge port of the drying box.

[0010] Furthermore, pressure transmitters are installed on the first air pipes on both sides of the filter bag filter, and the pressure transmitters are electrically connected to a control system, which is respectively electrically connected to the first sealed feeding device, the second sealed feeding device, the first sealed feeding device, the second sealed feeding device, the negative pressure device, the agitator, the first switch valve, and the second switch valve.

[0011] Furthermore, the first air pipe located on the side of the filter bag filter away from the loading hopper is connected to the second air pipe and the third air pipe, the third air pipe is installed with a fifth switch valve and a second manual switch valve in sequence, and the second air pipe is installed with a third manual switch valve.

[0012] Furthermore, the first sealed feeding device and the second sealed feeding device are both screw conveyors, and an observation port with a sealing cover is provided on the top of the first sealed feeding device away from the loading bin, and two hanging rings are fixedly connected to the screw conveyors.

[0013] Furthermore, pulse dust collectors are installed on the top of the feeding bin and the upper bin.

[0014] Furthermore, the first air delivery pipe is located below the first sealed material delivery device, and a sixth switch valve and a first manual switch valve are sequentially installed on the first air delivery pipe.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model is based on the existing loading silo, and can convey powder by arranging a first sealed feeding device, and by connecting the negative pressure device to the first sealed feeding device, before unloading, the first switch valve and the second switch valve can be closed, and then the exhaust fan and the first sealed feeding device can be started. During the operation of the exhaust fan, negative pressure can be formed in the first sealed feeding device, and then when unloading, the first switch valve and the second switch valve are opened at the same time, and the negative pressure can be used to quickly discharge the powder in the loading silo into the first sealed feeding device, thereby reducing the blockage of the discharge port of the loading silo, so as to facilitate the unloading of the powder into the first sealed feeding device, thereby improving the conveying efficiency of the powder; then, the first sealed feeding device can be used to transport the powder to the production tank; secondly, by arranging a filter bag filter, the powder can be prevented from entering the exhaust fan; in addition, during the unloading process, the exhaust fan can continue to operate to assist the unloading of the powder until the unloading is completed, and then the first switch valve and the exhaust fan are closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a structural diagram of part of the device of the utility model.

[0019] Reference numerals: 1, feeding bin; 2, feeding bin; 3, negative pressure device; 31, first air delivery pipe; 32, exhaust fan; 33, filter bag filter; 4, first sealed feeding device; 41, circular shell; 42, feeding circular pipe; 43, transmission wheel; 44, circular rope; 45, rope clamping plate; 46, feeding tray; 47, notch; 5, first sealed feeding device; 51, observation port; 6, second sealed feeding device; 7, second sealed feeding device; 8, drying box; 9, Pressure transmitter; 10. Pulse dust collector; 11. Weighing sensor; 12. First on-off valve; 13. Second on-off valve; 14. Agitator; 15. Fourth on-off valve; 16. Feed pipe; 17. Feed hose; 18. Seventh on-off valve; 19. Second air pipe; 20. Third air pipe; 21. Fifth on-off valve; 22. Second manual on-off valve; 23. Third manual on-off valve; 24. Lifting ring; 25. Sixth on-off valve; 26. First manual on-off valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 2As shown, the utility model provides a powder negative pressure conveying device. When in use, the utility model is installed as a whole on a frame; it includes a vertically arranged loading bin 1. When in use, a weighing sensor 11 can be installed on the loading bin 1 to measure the weight of the powder in the loading bin 1; a discharge port is provided at the bottom of the loading bin 1, and a first switch valve 12 is installed on the discharge port of the loading bin 1. The first switch valve 12 can be set as a pneumatic plug-in valve to automatically open and close the discharge channel of the discharge port of the loading bin 1; the discharge port of the loading bin 1 is also connected to a horizontally arranged first sealed feeding device 5, and the first sealed feeding device 5 can convey the powder; the first sealed feeding device 5 is provided with a discharge port at one end away from the loading bin 1, and the discharge port of the first sealed feeding device 5 A second switch valve 13 is installed on the material port, and the second switch valve 13 can be set as a pneumatic rotary valve, which is used to automatically open and close the discharge channel of the discharge port of the first sealed feeding device 5; and the first sealed feeding device 5 is connected to a negative pressure device 3 at one end close to the upper bin 1, and the negative pressure device 3 includes a first air pipe 31 connected to the first sealed feeding device 5, and the first air pipe 31 is connected to an exhaust fan 32 at one end away from the first sealed feeding device 5, and a filter bag filter 33 is installed on the first air pipe 31. Specifically, the exhaust fan 32 can be set as a Roots blower, and the filter bag filter 33 can allow gas to pass through when in use, but cannot allow powder to pass through. In this way, during the unloading process, when the exhaust fan 32 is running, powder can be prevented from entering the exhaust fan 32.

[0022] Before unloading, the first switch valve 12 and the second switch valve 13 can be closed, and then the exhaust fan 32 and the first sealed feeding device 5 can be started. During the operation of the exhaust fan 32, a negative pressure can be formed in the first sealed feeding device 5. Then, when unloading, the first switch valve 12 and the second switch valve 13 are opened at the same time, and the negative pressure can be used to discharge the powder in the upper bin 1 into the first sealed feeding device 5. This can reduce the blockage of the discharge port of the upper bin 1, so that the powder can be quickly discharged into the first sealed feeding device 5, thereby improving the transportation efficiency of the powder. Then, the first sealed feeding device 5 can be used to transport the powder to the production tank; in addition, during the unloading process, the exhaust fan 32 can continue to operate to assist in the unloading of the powder until the unloading is completed, and then the first switch valve 12 and the exhaust fan 32 are closed.

[0023] When the position of the feeding bin 1 is higher, in order to facilitate the addition of powder into the feeding bin 1, Figure 1As shown, the powder negative pressure conveying equipment also includes a vertically arranged feeding bin 2, which is lower than the upper feeding bin 1, and a stirrer 14 is installed in the feeding bin 2. The stirrer 14 can be set as an anchor-type stirrer with scraping wall. When in use, the stirrer 14 can break up the agglomerated powder in the feeding bin 2 to facilitate the subsequent discharge of the powder from the upper feeding bin 1; a discharge port is opened at the bottom of the feeding bin 2, and a fourth switch valve 15 is installed on the discharge port of the feeding bin 2. The fourth switch valve 15 can be set as a pneumatic plug-in valve for automatically opening and closing the discharge channel of the discharge port of the feeding bin 2.

[0024] In addition, the discharge port of the feeding bin 2 is also connected to a horizontally arranged second sealed feeding device 6, and the end of the second sealed feeding device 6 away from the feeding bin 2 is connected to a vertically distributed first sealed loading device 4, a discharge port is opened on the top of the first sealed loading device 4, and the discharge port of the first sealed loading device 4 is connected to a horizontally arranged second sealed loading device 7, and a feeding pipe 16 with a switch valve is connected between the second sealed loading device 7 and the loading bin 1, and the switch valve can be used to automatically open and close the feeding of the feeding pipe 16. The material channel, when in use, after opening the fourth switch valve 15, the powder in the feeding bin 2 can be added into the loading bin 1 through the second sealed feeding device 6, the first sealed loading device 4 and the second sealed loading device 7. Since the feeding bin 2 is lower than the loading bin 1, it is convenient to add the powder into the loading bin 1; in addition, after the powder in the feeding bin 2 is added into the loading bin 1, when the switch valve on the feeding pipe 16 and the first switch valve 12 are both in the closed state, the loading bin 1 can be made sealed.

[0025] The specific configuration of the first sealing feeding device 4 is as follows: Figure 1 and Figure 2 As shown, the first sealed feeding device 4 includes two circular shells 41 with a cavity structure, and two vertically oppositely arranged feeding circular tubes 42 are fixedly connected between the two circular shells 41, and the two circular shells 41 are respectively connected to the second sealed feeding device 6 and the second sealed feeding device 7. The two circular shells 41 are also coaxially rotatably connected with transmission wheels 43, one of which is connected to a driving motor installed outside the circular shell 41, and an annular rope 44 is installed between the two transmission wheels 43, which passes through the feeding circular tubes 42 respectively. Specifically, the annular rope 44 can be set as a steel wire rope. When in use, a number of rope clamping plates 45 equidistantly distributed along the circumference of the transmission wheel 43 can be installed on both sides of the transmission wheel 43 to prevent the annular rope 44 from slipping off the transmission wheel 43.

[0026] In addition, a plurality of feed trays 46 are fixedly provided on the circular rope 44, which are equidistantly distributed along the circumference of the circular rope 44 and adapted to the feed circular tube 42; each transmission wheel 43 is provided with a plurality of notches 47, which are equidistantly distributed along the circumference of the transmission wheel 43 and opposite to the feed tray 46. When the feed tray 46 moves to the position of the transmission wheel 43, the notches 47 can prevent the feed tray 46 from colliding with the transmission wheel 43; during use, after starting the drive motor, the feed tray 46 on the circular rope 44 can be moved under the drive of the two transmission wheels 43, and the powder in the second sealed feeding device 6 can be added to the second sealed loading device 7; secondly, the circular shell 41 can be provided with an opening, and an openable and closable shell cover is installed at the opening position on the circular shell 41, so that during routine maintenance, the powder in the circular shell 41 can be cleaned after opening the shell cover.

[0027] Further, such as Figure 1 As shown, the second sealing feeding device 7 has the same structure as the first sealing feeding device 4, except that the second sealing feeding device 7 is arranged horizontally. The feeding direction of the second sealing feeding device 7 and the first sealing feeding device 4 is as shown in FIG. Figure 1 and the second sealing feeding device 7 is lower than the discharge port of the first sealing feeding device 4 and is connected through the feed hose 17, so that the powder in the first sealing feeding device 4 can be discharged to the second sealing feeding device 7.

[0028] Further, such as Figure 1 As shown, a drying box 8 is connected between the feeding bin 2 and the second sealed feeding device 6, a stirring device is installed in the drying box 8, and a seventh switch valve 18 is installed on the discharge port of the drying box 8. The seventh switch valve 18 can be set as a pneumatic rotary valve for automatically opening and closing the discharge channel of the discharge port of the drying box 8. Specifically, during use, when the powder in the feeding bin 2 is discharged, the seventh switch valve 18 can be closed, and then the drying box 8 and the stirring device are started at the same time, the powder can be dried and the agglomerated powder can be broken up again, which is more convenient for the subsequent discharge of the powder from the upper bin 1.

[0029] Further, such as Figure 1As shown, pressure transmitters 9 are installed on the first air delivery pipes 31 on both sides of the filter bag filter 33. The pressure transmitters 9 are electrically connected to a control system. The control system is electrically connected to the first sealed feeding device 5, the second sealed feeding device 6, the first sealed feeding device 4, the second sealed feeding device 7, the negative pressure device 3, the agitator 14, the first switch valve 12, and the second switch valve 13. Specifically, the control system is a PLC controller in the prior art. When in use, the control system can control the first sealed feeding device 5, the second sealed feeding device 6, the first sealed feeding device 4, the second sealed feeding device 7, the negative pressure device 3, the agitator 14, the first switch valve 12, and the second switch valve 13. , the agitator 14, the first switch valve 12 and the second switch valve 13 operate automatically, and the operating speed of each device can also be adjusted and controlled, such as the speed of the exhaust fan 32 when exhausting air; and the pressure transmitter 9 can detect the size of the pressure in the first air pipe 31, and the detected pressure value can be transmitted to the control system, so that when the powder in the feeding bin 1 is unloaded, when the pressure value detected by the pressure transmitter 9 reaches the set pressure value, the first switch valve 12 and the second switch valve 13 can be opened at the same time through the control system; in addition, the pressure transmitter 9 can also be used to detect whether the filter bag filter 33 and the first air pipe 31 are blocked.

[0030] Further, such as Figure 1 As shown, the first gas pipe 31 located on the side of the filter bag filter 33 away from the upper hopper 1 is connected to the second gas pipe 19 and the third gas pipe 20, and the third gas pipe 20 is sequentially installed with a fifth switch valve 21 and a second manual switch valve 22. The fifth switch valve 21 can be set as an electromagnetic switch valve for automatically opening and closing the gas channel in the third gas pipe 20, and the second manual switch valve 22 is a spare switch valve, which can be set as a manual ball valve for manually opening and closing the gas channel in the third gas pipe 20; the second gas pipe 19 is installed with a third manual switch valve 23, which can be set as a manual ball valve for manually opening and closing the second gas pipe 19 Specifically, when the bag filter 33 and the first air pipe 31 are blocked or during routine maintenance, after closing the negative pressure device 3 and the first switch valve 12, the second air pipe 19 can be connected to the compressed gas, so that when the fifth switch valve 21 and the second manual switch valve 22 are opened, the powder in the bag filter 33 and the first air pipe 31 can be blown out from the discharge port of the first sealed feeding device 5 to prevent blockage caused by powder accumulation; the second air pipe 19 can be used as an air supply pipe; at this time, when the negative pressure device 3 is in operation, the fifth switch valve 21, the second manual switch valve 22 and the third manual switch valve 23 are all closed.

[0031] Further, such as Figure 1As shown, the first sealed feeding device 5 and the second sealed feeding device 6 are both screw conveyors, so that when the powder is conveyed, the powder can be prevented from being blocked in the first sealed feeding device 5 and the second sealed feeding device 6; and the top of the first sealed feeding device 5 away from the end of the upper hopper 1 is provided with an observation port 51 with a sealing cover. When in use, after opening the observation port 51, the powder at the discharge port of the first sealed feeding device 5 can be regularly cleaned; two hanging rings 24 are fixedly connected to the screw conveyor, and by setting the hanging rings 24, the first sealed feeding device 5 and the second sealed feeding device 6 can be installed at appropriate positions on the frame.

[0032] Further, such as Figure 1 As shown, pulse dust collectors 10 are installed on the top of the feeding bin 2 and the upper bin 1. Specifically, the pulse dust collector 10 can be set as a bag pulse dust collector. When in use, the pulse dust collector 10 can remove dust from the feeding bin 2 and the upper bin 1 to reduce dust pollution. In addition, before adding powder to the upper bin 1, the pulse dust collector 10 can be turned on first, and then when adding powder to the upper bin 1, it can not only remove dust, but also balance the air pressure inside the upper bin 1 to avoid affecting the weight of the upper bin 1, thereby preventing the data of the weighing sensor 11 from being unstable.

[0033] Further, such as Figure 1 As shown, the first gas pipe 31 is located below the first sealed material conveying device 5, which makes it convenient to install the negative pressure device 3 on the first sealed material conveying device 5; and the sixth switch valve 25 and the first manual switch valve 26 are installed on the first gas pipe 31 in sequence. Specifically, the sixth switch valve 25 can be set as an electromagnetic switch valve for automatically opening and closing the gas channel in the first gas pipe 31; and the first manual switch valve 26 is a spare switch valve, which can be set as a manual ball valve for manually opening and closing the gas channel in the first gas pipe 31.

[0034] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder negative pressure conveying device, comprising a vertically arranged loading silo, characterized in that: A discharge port is provided at the bottom of the upper feeding bin, and a first switch valve is installed on the discharge port of the upper feeding bin. The discharge port of the upper feeding bin is also connected to a horizontally arranged first sealed feeding device. A discharge port is provided at the end of the first sealed feeding device away from the upper feeding bin, a second switch valve is installed on the discharge port of the first sealed feeding device, and the end of the first sealed feeding device close to the upper feeding bin is connected to a negative pressure device, the negative pressure device includes a first air pipe connected to the first sealed feeding device, the end of the first air pipe away from the first sealed feeding device is connected to an exhaust fan, and a filter bag filter is installed on the first air pipe.

2. The negative pressure powder conveying device according to claim 1, characterized in that: It also includes a vertically arranged feeding bin, which is lower than the loading bin, and an agitator is installed in the feeding bin, a discharge port is provided at the bottom of the feeding bin, and a fourth switch valve is installed on the discharge port of the feeding bin, the discharge port of the feeding bin is also connected to a horizontally arranged second sealed feeding device, the end of the second sealed feeding device away from the feeding bin is connected to a vertically distributed first sealed loading device, the top of the first sealed loading device is provided with a discharge port, and the discharge port of the first sealed loading device is connected to a horizontally arranged second sealed loading device, and a feeding pipe with a switch valve is connected between the second sealed loading device and the loading bin.

3. The negative pressure powder conveying device according to claim 2, characterized in that: The first sealed feeding device includes two circular shells with a cavity structure, and two vertically oppositely arranged feeding circular tubes are fixedly connected between the two circular shells, and the two circular shells are respectively connected to the second sealed feeding device and the second sealed feeding device. Transmission wheels are also coaxially connected to the two circular shells, one of which is connected to a driving motor installed outside the circular shell, and an annular rope that passes through the feeding circular tubes is installed between the two transmission wheels. A plurality of feeding discs are fixedly sleeved on the annular rope, which are evenly distributed along the circumference of the annular rope and adapted to the feeding circular tube; each transmission wheel is provided with a plurality of notches that are evenly distributed along the circumference of the transmission wheel and are opposite to the position of the feeding disc.

4. The negative pressure powder conveying device according to claim 3, characterized in that: The second sealing loading device has the same structure as the first sealing loading device, and the second sealing loading device is lower than the discharge port of the first sealing loading device and is connected to the first sealing loading device through a feeding hose.

5. The negative pressure powder conveying device according to claim 2, characterized in that: A drying box is connected between the feeding bin and the second sealed feeding device. A stirring device is installed in the drying box, and a seventh switch valve is installed on the discharge port of the drying box.

6. The negative pressure powder conveying device according to claim 2, characterized in that: Pressure transmitters are installed on the first air pipes on both sides of the filter bag filter. The pressure transmitters are electrically connected to a control system. The control system is electrically connected to the first sealed feeding device, the second sealed feeding device, the first sealed feeding device, the second sealed feeding device, the negative pressure device, the agitator, the first switch valve, and the second switch valve respectively.

7. The negative pressure powder conveying device according to claim 6, characterized in that: The first air pipe located on the side of the filter bag filter away from the loading bin is connected to the second air pipe and the third air pipe. The fifth switch valve and the second manual switch valve are installed on the third air pipe in sequence, and the third manual switch valve is installed on the second air pipe.

8. The negative pressure powder conveying device according to claim 2, characterized in that: The first sealed feeding device and the second sealed feeding device are both screw conveyors, and an observation port with a sealing cover is provided on the top of the first sealed feeding device away from the loading bin, and two hanging rings are fixedly connected to the screw conveyors.

9. The negative pressure powder conveying device according to claim 2, characterized in that: Pulse dust collectors are installed on the top of the feeding bin and the upper bin.

10. The negative pressure powder conveying device according to claim 1, characterized in that: The first air delivery pipe is located below the first sealed material delivery device, and the sixth switch valve and the first manual switch valve are installed on the first air delivery pipe in sequence.

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