CN113144779A

CN113144779A - Fodder drying-machine and filter screen self-cleaning device thereof

Info

Publication number: CN113144779A
Application number: CN202110149458.3A
Authority: CN
Inventors: 裴照辉; 张鹏飞; 唐传良
Original assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Current assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-07-23

Abstract

The invention relates to a self-cleaning device for a filter screen of a feed dryer, which comprises a frame, wherein the frame is provided with an air inlet channel; the filter screen assembly is arranged on the frame and comprises a closed filter screen and a supporting rotating shaft, and the closed filter screen can rotate around the supporting rotating shaft in a circulating manner; the internal collecting device comprises a dust suction port and a negative pressure component, the negative pressure component is communicated with the dust suction port, and the dust suction port is arranged on the inner side of the closed filter screen. By arranging the internal collecting device, dust on the inner surface and in the inner side of the closed filter screen is sucked from the inner side of the closed filter screen, so that the closed filter screen is effectively cleaned; the closed filter screen can rotate circularly, so that the dust suction port of the internal collection device can suck all parts of the inner surface of the closed filter screen. Still provide a fodder drying-machine that has above-mentioned filter screen self-cleaning device.

Description

Fodder drying-machine and filter screen self-cleaning device thereof

Technical Field

The invention relates to the technical field of feed processing equipment, in particular to a feed dryer and a filter screen self-cleaning device thereof.

Background

A feed dryer is a device for drying feed. At present, a heat exchanger is adopted to heat air flow in a feed dryer which takes steam as a medium for heating, and because aluminum fins are fully distributed on a radiating pipe of the heat exchanger and gaps are small, particles, dust or fibers in the air flow are easy to accumulate on the aluminum fins; in addition, in order to reduce resource waste, part of hot air to be exhausted from the dryer is often introduced into the air inlet for recycling, and the hot air secondarily utilized at this time can carry particles, dust or fibers with high humidity, and once the dryer is used for a long time, the particles, dust or fibers can be condensed on the heat exchanger, so that the work of the heat exchanger is influenced. Therefore, a set of filter screen device is generally added in front of the heat exchanger to filter particles or dust or fibers.

Present filter screen is pure mechanical type, improves the function through the mesh form or the increase number of piles of change filter screen usually, but pure mechanical type all needs artifical clearance, changes the filter screen through the manual work, then utilizes the compressed air jetting in the workshop or squirt clearance, wastes time and energy. In addition, when replacing the filter screen, an operator is required to take out the filter screen from the inside of the feed dryer. Because the temperature inside the feed dryer is very high, the feed dryer needs to be shut down and can be replaced after the interior of the dryer is cooled to a safe temperature, and thus production stop loss is also caused.

Disclosure of Invention

Based on this, it is necessary to provide a feed dryer and a self-cleaning device for a filter screen thereof, aiming at the problem that the filter screen in front of a heat exchanger of the traditional feed dryer is inconvenient to clean.

A self-cleaning device for a filter screen of a feed dryer comprises a frame, wherein the frame is provided with an air inlet channel; the filter screen assembly is arranged on the frame and comprises a closed filter screen and a supporting rotating shaft, and the closed filter screen can rotate around the supporting rotating shaft in a circulating manner; the internal collecting device comprises a dust suction port and a negative pressure component, the negative pressure component is communicated with the dust suction port, and the dust suction port is arranged on the inner side of the closed filter screen.

By arranging the internal collecting device, dust on the inner surface and in the inner side of the closed filter screen is sucked from the inner side of the closed filter screen, so that the closed filter screen is effectively cleaned; the closed filter screen can rotate circularly, so that the dust suction port of the internal collection device can suck all parts of the inner surface of the closed filter screen.

In one embodiment, the internal collection device comprises a dust suction pipe, the dust suction pipe is located on the inner side of the closed filter screen, the dust suction port is formed in the dust suction pipe, and the dust suction pipe is communicated with the negative pressure assembly.

In one embodiment, the bottom of the closed filter screen is close to the bottom of the air inlet channel, and the dust suction pipe is close to the bottom of the closed filter screen.

In one embodiment, the suction duct includes a first suction duct, a plurality of second suction ducts communicating with the first suction duct, the second suction ducts extending in a radial direction of the first suction duct, and the plurality of second suction ducts being distributed on a circumferential surface of the first suction duct in an axial direction of the first suction duct.

In one embodiment, the supporting rotating shaft is a hollow shaft, the dust suction port is formed in the supporting rotating shaft, and the supporting rotating shaft is communicated with the negative pressure assembly.

In one embodiment, the supported rotating shaft comprises a driving shaft and a driven shaft, the driving shaft and the driven shaft are installed on the frame, the closed filter screen is supported on the driving shaft and the driven shaft, the self-cleaning device for the filter screen of the feed dryer further comprises a driving assembly, the driving assembly is connected with the driving shaft, the driving shaft is used for driving the closed filter screen to rotate circularly, at least one of the driving shaft and the driven shaft is a hollow shaft, the outer surface of the hollow shaft is provided with the dust suction port, and two ends of the hollow shaft are communicated with the negative pressure assembly.

In one embodiment, the closed filter screen is provided with an extending end extending out of the air inlet channel, and the self-cleaning device of the filter screen of the feed dryer further comprises a blowing device, wherein the blowing device comprises an air port which is arranged on one side of the extending end of the closed filter screen and can blow air to the outer surface of the extending end.

In one embodiment, the self-cleaning device for the filter screen of the feed dryer further comprises a negative pressure cleaning device, wherein the negative pressure cleaning device comprises a dust hood which is arranged on the other side of the extending end of the closed filter screen and is opened towards the extending end, and a negative pressure device communicated with the dust hood.

In one embodiment, the self-cleaning device for the filter screen of the feed dryer further comprises a scraping device, wherein the scraping device comprises a scraping part arranged on the other side of the extending end, and the scraping part is attached to the outer surface of the extending end.

Still provide a fodder drying-machine, include fodder drying-machine filter screen automatically cleaning device, fodder drying-machine still includes stoving chamber, heat exchanger, wherein the stoving chamber with air intake channel's air outlet intercommunication, heat exchanger sets up in the air intake channel, and be located the air outlet with between the closed type filter screen.

Drawings

Fig. 1 is a partial structural view of a fodder dryer according to an embodiment of the present invention.

Fig. 2 is a schematic view of an overall structure of a self-cleaning filtering device of a feed dryer according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a blowing device in the self-cleaning filtering device according to an embodiment of the present invention.

Fig. 4 and 5 are schematic views illustrating different angles of assembling a filter screen assembly in a self-cleaning filter device according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a closed filter screen in the self-cleaning filter device according to an embodiment of the present invention.

FIG. 7 is a schematic view of a portion of a self-cleaning filter device with an internal collection device according to an embodiment of the present invention.

Fig. 8 and 9 are schematic structural diagrams of different viewing angles of the internal collecting device and the closed filter screen in a working state.

Fig. 10 is a schematic view of the structure of the internal collection device of fig. 8.

Fig. 11 is a schematic view of the construction of the suction pipe in the inner collection device of fig. 10.

Fig. 12 is a sectional view taken along the line a-a in fig. 11.

Figure 13 is a side view of the suction tube shown in figure 11.

Fig. 14 is a sectional view taken along line B-B in fig. 13.

FIG. 15 is a partial schematic view of a self-cleaning filter device with an internal collection device according to another embodiment of the present invention

Fig. 16 is a schematic structural view of an internal collection device and a closed filter screen in another embodiment in a working state.

Fig. 17 is a schematic view of the structure of the internal collection device of fig. 16.

The relevant elements in the figures are numbered correspondingly as follows:

100. a self-cleaning device for a filter screen of the feed dryer;

10. a frame; 110. an air inlet channel; 111. an air inlet; 112. an air outlet;

20. a screen assembly; 210. a closed filter screen; 211. an extension end; 212. a chain; 213. a horizontal segment; 220. a swing mechanism; 221. a drive shaft; 2211. a drive sprocket; 222. a driven shaft 222; 223. a drive assembly; 2231. a motor; 2232. a speed reducer; 2233. a first sprocket; 2234. a second sprocket; 2235. connecting a chain; 230. a support frame; 240. a support bar; 250. a mounting frame; 260. an auxiliary shaft;

30. a cleaning device; 310. air bags; 320. an air tube; 330. a pneumatic link; 340. an electromagnetic valve; 350. a blowing pipe; 351. a gas port;

40. a negative pressure cleaning device; 410. a dust hood; 420. a negative pressure device; 421. an air suction pipe; 422. a fan;

50. a scraping device; 510. a scraping section;

60. an internal collection device; 610. a dust suction port; 620. a negative pressure assembly; 621. an air pump; 622. a collection pipe; 623. a connecting pipe; 624. a drive shaft connecting pipe; 625. a driven shaft connecting pipe; 630. a dust collection pipe; 631. a first straw; 632. a second straw;

200. a heat exchanger; 300. and a drying cavity.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The invention provides a feed dryer and a self-cleaning device of a filter screen thereof, aiming at the problem that the filter screen in front of a heat exchanger in the traditional feed dryer is inconvenient to clean. Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic partial structure view of a feed dryer formed by a self-cleaning device 100 for a filter screen of the feed dryer according to an embodiment of the present invention. The fodder dryer comprises a fodder dryer filter screen self-cleaning device 100, a heat exchanger 200 and a drying cavity 300. The feed dryer further includes a feeding mechanism for feeding the feed into the drying chamber 300, an exhaust gas treatment system (not shown), and the like. The operation principle of the fodder dryer is that the air heated by the heat exchanger 200 enters the drying chamber 300 to dry the fodder advancing along the conveyor belt (not shown) in the drying chamber 300, and the exhaust air is discharged from the drying chamber 300 and treated by the exhaust gas treatment system. The conveyor belt in the drying chamber 300 may be provided in multiple layers in the height direction of the drying chamber to dry the fodder several times. The working principle of the feeding mechanism, the tail gas treatment system and the feed dryer is well known to those skilled in the art, and is not the focus of the present invention, and will not be described herein.

Referring to fig. 1 and 2, a filter screen self-cleaning device 100 of a feed dryer includes a frame 10, a filter screen assembly 20 disposed on the frame 10, and a cleaning device 30, wherein the cleaning device 30 is used for cleaning a filter screen in the filter screen assembly 20, and can achieve an effect of automatic cleaning without stopping.

As shown in fig. 1, the frame 10 is provided with an air inlet channel 110, the air inlet channel 110 is provided with an air inlet 111 and an air outlet 112, wherein the filter screen assembly 20 is preferably disposed at the air inlet 111, and may also be disposed at a certain distance from the air inlet 111. The air inlet 111 is used for allowing external air to flow into the air inlet channel 110, and the air outlet 112 is used for communicating with the drying chamber 300 so that air flowing through the filter screen assembly 20 can flow into the drying chamber 300. The external gas referred to herein includes external fresh air and also includes exhaust gas treated by the exhaust gas treatment system. In a use state, the frame 10 is disposed above the drying chamber 300, the bottom of the frame 10 is supported against the top of the drying chamber 300, and the heat exchanger 200 is disposed inside the air intake passage 110 and between the filter screen assembly 20 and the air outlet 112, so that the air flowing to the heat exchanger 200 and heated by the heat exchanger 200 is clean air filtered by the filter screen assembly 20, and the operation of the heat exchanger 200 and the quality of the feed are not affected.

The outer shape of the frame 10 is not particularly limited. Generally, the frame 10 is provided in a rectangular parallelepiped shape, and the bottom size thereof is approximately equivalent to the top size of the drying chamber 300. The specific type of the heat exchanger 200 is not limited, as the heat exchanger 200 may be of a conventional type, such as including a heat dissipating pipe provided with aluminum fins, which may be heated by hot water or electric heating.

In order to clean the filter screen in the filter screen assembly 20 in time and realize automatic cleaning without shutdown. As shown in fig. 1 and 2, in an embodiment of the present invention, the filter screen assembly 20 includes a closed filter screen 210, a swing mechanism 220, the swing mechanism 220 is used for driving the closed filter screen 210 to rotate circularly, wherein the closed filter screen 210 is installed in the air intake passage 110, and the closed filter screen 210 has a protruding end 211 protruding out of the air intake passage 110. The cleaning means is provided outside the protruding end 211 of the closed filter mesh 210 for cleaning the outer surface of the protruding end 211. The cleaning device 30 includes a gas cleaning device, a water flow cleaning device, a scraping device, and the like.

The working process of the self-cleaning device 100 for the filter screen of the feed dryer is as follows: after the feed dryer is started, when the closed filter screen 210 works for a period of time and particles or dust are adhered on the closed filter screen 210, the swing mechanism 220 drives the closed filter screen 210 to rotate circularly, the closed filter screen 210 is in a rotating state, and the cleaning device cleans the outer surface of the extending end 211 of the closed filter screen 210. Because the closed filter screen 210 is always in a rotating state, continuous cleaning of the closed filter screen 210 can be realized as long as the protruding end 211 is cleaned; and the closed type filter screen 210 always filters in the air inlet channel 110, thereby realizing automatic cleaning without stopping.

As shown in fig. 1 and 2, in one example, the swing mechanism 220 includes a driving shaft 221, a driven shaft 222, and a driving assembly 223, wherein the driving assembly 223, the driving shaft 221, and the driven shaft 222 are mounted on the frame 10, the driving assembly 223 is connected with the driving shaft 221, the closed filter screen 210 is supported on the driving shaft 221 and the driven shaft 222, and the driving shaft 221 is used for driving the closed filter screen 210 to rotate circularly.

Specifically, as shown in fig. 1, 2, 4 and 5, the swing mechanism 220 further includes two support frames 230 respectively disposed at two sides of the top of the frame 10. The driving shaft 221 is disposed outside the frame 10 and above the air intake passage 110, and both ends of the driving shaft 221 are rotatably supported by the two support brackets 230. The driven shafts 222 are arranged at the bottom of the frame 10, and the number of the driven shafts 222 is 2, and the driven shafts 222 are positioned at two sides of the bottom of the frame 10. The closed filter screen 210 is a ring-shaped filter screen, and inner surfaces of both ends of the closed filter screen 210 are supported on the driving shaft 221 and the driven shaft 222, respectively, so as to be rotatable around the driving shaft 221 and the driven shaft 222 in a circulating manner. The protruding end 211 of the closed filter screen 210 extends out of the top of the frame 10 and is supported by the driving shaft 221, and the bottom end of the closed filter screen 210, that is, the end accommodated in the air intake channel 110, is supported by the driven shaft 222. The driving assembly 223 is used for driving the driving shaft 221 to rotate, and the specific setting mode of the driving assembly 223 is not limited, and the driving shaft 221 can be driven to rotate. Preferably, the driving assembly 223 includes a motor 2231 and a speed reducer 2232, wherein the speed reducer 2232 is mounted on the frame 10 and driven by the motor 2231, and an output shaft of the speed reducer 2232 rotates with the driving shaft 221 through a transmission mechanism. The transmission mechanism includes a first sprocket 2233 provided on the output shaft of the speed reducer 2232, a second sprocket 2234 provided on the drive shaft 221, and a connecting chain 2235 connecting the first sprocket 2233 and the second sprocket 2234. The transmission mechanism is not limited to the above examples, and the transmission mechanism may be a gear mechanism or a belt transmission mechanism.

The driven shaft 222 is arranged at the bottom of the frame 10, so that when the closed filter screen 210 is coated on the driven shaft 222, the gap between the bottom of the closed filter screen 210 and the bottom of the air inlet channel 110 is smaller, the shielding effect of the closed filter screen 210 on the air inlet channel 110 is better, and the filtering effect is better.

The cyclical rotation of the closed filter screen 210 is driven by the rotation of the drive shaft 221. Specifically, two ends of the driving shaft 221 and two ends of the driven shaft 222 are respectively provided with a driving sprocket 2211, two side portions of the closed filter screen 210 are fixedly connected with an annular chain 212, and the annular chain 212 is matched with the driving sprockets 2211, so that the driving shaft 221 can drive the closed filter screen 210 to rotate.

In yet another example, the swing mechanism 220 may be a mechanism including a driving shaft 221 and a driven shaft 222 for supporting the closed filter screen 210, a transmission device and a driving assembly, wherein the transmission device includes a closed transmission belt disposed on a side or an inner surface of the closed filter screen 210, and a transmission gear connecting the driving assembly and the closed transmission belt, so that the driving assembly can drive the closed filter screen 210 to rotate circularly. In this example, the driving shaft 221 and the driven shaft 222 are not directly used to drive the closed filter screen 210 to rotate, but are used only as a supporting rotation shaft. In the foregoing embodiment, the driving shaft 221 and the driven shaft 222 are used as supporting rotating shafts, and the driving shaft 221 is also used for driving the closed filter screen 210 to rotate circularly.

As shown in fig. 2 and 3, the cleaning device 30 is embodied as a blowing device including an air inlet 351 capable of blowing air toward the outer surface of the protruding end 211 provided at one side of the protruding end 211 of the closed filter screen 210. Specifically, a plurality of air ports 351 may be provided at intervals in the width direction of the closed filter screen 210, and the air ports 351 may be long slits having a length not smaller than the width of the closed filter screen 210. The width of the closed filter 210 is shown by arrow X in fig. 2.

In one example, as shown in fig. 3, the blowing device includes an air bag 310 and an air pipe 320 connected to the air bag 310, wherein the air pipe 320 is connected to a pneumatic link 330, an electromagnetic valve 340 and a blowing tube 350 in sequence, compressed air passes through the pneumatic link 330, the electromagnetic valve 340 and the blowing tube 350 through the air pipe 320, and the pneumatic link 330 mainly functions to filter the compressed air.

The blowing pipe 350 is provided on one side of the closed filter 210 in a width direction of the closed filter 210, and has a length not smaller than a width of the closed filter 210. A plurality of air ports 351 are uniformly formed in the outer circumferential surface of the blowing pipe 350 along the axial direction of the blowing pipe 350, and the air ports 351 are opposite to the extending end 211, so that the sprayed air can be opposite to the closed filter screen 210 to be effectively cleaned.

The blowing pipe 350 is supported and fixed to the frame 10. For example, the blowing pipe 350 is directly fixed at both ends thereof to the two support brackets 230 at both sides of the frame 10. As another example, a bracket may be added, with which the blowing tube 350 is fixed to the frame 10.

In the above embodiment, after the feed dryer is started, the swing mechanism 220 drives the closed filter screen 210 to rotate circularly, and the closed filter screen 210 is in a rotating state; the blowing pipe 350 blows out the compressed gas through the gas port 351, and can blow away the particles or dust attached to the protruding end 211, and since the closed filter screen 210 is always in a rotating state, continuous cleaning of the closed filter screen 210 can be realized as long as the protruding end 211 is cleaned.

Particles or dust can drift everywhere in the blowing process, and certain potential safety hazards exist. In order to solve the above problem, in an embodiment of the present invention, as shown in fig. 1 and fig. 2, a negative pressure cleaning device 40 is further included, wherein the negative pressure cleaning device 40 includes a dust hood 410 disposed on the other side of the protruding end 211 of the closed filter screen 210, and a negative pressure device 420 communicating with the dust hood 410, and an opening of the dust hood 410 faces the protruding end 211. That is, the dust hood 410 and the blowing tube 350 are disposed at both sides of the protruding end 211, respectively. The air blown from the blowing pipe 350 blows the particles or dust attached to the protruding end 211 to the dust hood 410, and the particles or dust are collected by the dust hood 410, so that the scattering of the particles or dust is reduced, and the environment pollution is avoided.

As shown in fig. 2, in conjunction with fig. 1, the dust collection cover 410 covers an outer surface of the closed filter screen 210 at the protruding end 211 thereof facing the dust collection cover 410. That is, the opening of the dust hood 410 is not smaller than the outer surface of the left side of the protruding end 211, and the two are located just opposite to each other. When the dust hood 410 is installed, the distance between the dust hood and the extension end 211 is not affected by the circular rotation of the closed filter screen 210.

As shown in fig. 2, in an example, the negative pressure cleaning device 40 includes a dust hood 410 and a negative pressure device 420, the negative pressure device 420 includes an air suction pipe 421 and a fan 422, wherein one end of the air suction pipe 421 is connected to the fan 422, and the other end is connected to the dust hood 410. The dust hood 410 is in a funnel shape, one end with a smaller opening of the dust hood 410 is connected with the air suction pipe 421, and the other end with a larger opening covers the outer surface of the left side of the extending end 211 of the closed filter screen 210.

When installed, the dust hood 410 may be fixed to the frame 10, for example, the dust hood 410 is fixedly connected to two supporting frames 230 at two sides of the frame 10. For another example, the dust hood 410 may be fixed to the frame 10 by adding a bracket. The dust hood 410 may be attached to the protruding end 211 or the frame 10 by a suction cup. The fan 422 is disposed outside the frame 10 at one side of the frame 10. In addition, the fan 422 may be fixed to the frame 10.

As described in the background art, in order to reduce the waste of resources, in the actual production, a part of hot air (waste gas) exhausted from the dryer is often introduced into the air inlet 111 for recycling, and the hot air secondarily utilized at this time may carry dust or particles with high humidity. Thus, when the dryer is used for a long time, the dust or particles are easily agglomerated on the protruding end 211. For such a dough (or cake), the cleaning effect of the blowing device is not ideal.

In view of the above problem, as shown in fig. 2, 4 and 5, in an embodiment of the present invention, a scraping device 50 is further provided, the scraping device 50 includes a scraping portion 510 disposed on the other side of the protruding end 211, and the scraping portion 510 is located between the dust hood 410 and the protruding end 211 and attached to the outer surface of the protruding end 211. When the closed filter screen 210 rotates circularly, the outer surface of the left side of the protruding end 211 contacts with the scraping part 510, the above-mentioned dough can be scraped by the scraping part 510, and the scraped dough is at least partially collected by the negative pressure cleaning device 40. When the power of the fan 422 is sufficient, all of the scraped dough enters the dust hood 410 under suction and is collected.

In the above embodiment, the blowing device blows off the particles or dust on the closed filter screen 210, and the negative pressure cleaning device 40 collects the particles or dust; meanwhile, after the particles or dust are coagulated into a dough, the scraping part 510 can scrape the dough on the closed filter screen 210 and at least partially collect the dough through the negative pressure cleaning device 40, so that the feed dryer can achieve a self-cleaning effect without stopping, and the closed filter screen 210 is cleaned thoroughly and better.

As shown in fig. 5, the scraping portion 510 is embodied as a scraper having a length not smaller than the width of the closed filter screen 210. In other embodiments, scraping portion 510 may also be a brush, a scraping bar, or the like. In one example, scraper portion 510 is a brush made of nylon.

As shown in fig. 6, the inner surface of the closed filter screen 210 is provided with a plurality of support rods 240 at equal intervals in the circumferential direction. The support rod 240 enables the pressure resistance of the filter screen to be better and is not easy to damage.

When the closed filter screen 210 is operated, the outer surface of the protruding end is cleaned by a cleaning device on one side. Then, the particles or dust may enter the inner side of the closed filter screen 210 through the meshes of the closed filter screen 210, and the cleaning device 30 cannot clean the particles or dust. In the embodiment of the present invention, the inner side of the closed filter 210 refers to an inner space surrounded by the closed filter 210, and correspondingly, the outer side of the closed filter 210 refers to a space other than the inner space.

In view of the above problem, in an embodiment of the present invention, as shown in fig. 7, an internal collection device 60 is further provided to suck dust from the inner side of the closed filter screen 210. Fig. 7 illustrates a schematic configuration of the fodder dryer shown in fig. 1, in which the heat exchanger 200 and the drying chamber 300 are omitted from illustration, and the external cleaning device 30, the negative pressure cleaning device 40, and the scraping device 50 are omitted from illustration, when only the internal collecting device 60 is provided. In the present embodiment, the internal collection device 60 is used in combination with the cleaning device 30, the negative pressure cleaning device 40, and the scraping device 50 located outside the closed filter net. In addition, the inner collection device 60 may also be used independently, i.e., without the outer cleaning device 30, the negative pressure cleaning device 40, or the scraping device 50.

As shown in fig. 7 and 8, the internal collection device 60 includes a suction port 610, and a negative pressure assembly 620, wherein the negative pressure assembly 620 is communicated with the suction port 610, and the suction port 610 is disposed inside the closed filter screen 210. When the vacuum assembly 620 operates, dust on the inner side of the closed filter screen 210 is sucked through the dust suction port 610. Since the closed filter 210 can be rotated in a circulating manner, the dust can be sucked everywhere on the inner surface of the closed filter 210 by the inner collecting device 60 and the dust penetrated to the inner side of the closed filter 210 can be sucked.

As shown in fig. 8 and 9, the internal collection device 60 includes a suction pipe 630, the suction pipe 630 is located inside the closed filter screen 210, the suction port 610 is opened on the suction pipe 630, and the suction pipe 630 is communicated with the negative pressure assembly 620. In a specific arrangement, the axial direction of the dust suction pipe 630 is the same as the width direction of the closed filter screen 210, and the dust suction pipe 630 is provided with a plurality of dust suction ports 610 along the axial direction thereof. The suction opening 610 is a radial hole formed on the outer surface of the suction pipe 630.

In one example, as shown in fig. 10, the negative pressure assembly 620 includes an air pump 621, a collecting pipe 622, and two connecting pipes 623, wherein the collecting pipe 623 is communicated with the air pump 621, and the two connecting pipes 623 respectively communicate two ends of the dust suction pipe 630 with the collecting pipe 622. The air pump 621 may be other device capable of generating suction, such as a fan. In other examples, the two ends of the dust suction pipe 630 may be independently connected with the negative pressure assembly 620; alternatively, one end of the dust suction pipe 630 may be closed, and the other end of the dust suction pipe may be connected to the negative pressure assembly 620.

Referring to fig. 1 and 7 in combination, when the fodder dryer is provided with the external cleaning device 30, the negative pressure cleaning device 40 and the internal collection device 60 at the same time, the air pump 621 of the internal collection device 60 and the fan 422 of the negative pressure cleaning device 40 are disposed at positions that do not interfere with each other, such as the position of the fan 422 can be adjusted by changing the length of the air suction pipe 421 so that the fan 422 does not interfere with the position of the air pump 621.

In this embodiment, the bottom of the closed filter screen 210 is close to the bottom of the air intake passage 110, and the dust suction pipe 630 is close to the bottom of the closed filter screen 210. In a specific arrangement, the dust suction pipe is located between the driving shaft 221 and the driven shaft 222 and close to the driven shaft 222, and the dust suction pipe 630 is also close to the bottom of the closed filter screen 210 because the driven shaft 222 is close to the bottom of the closed filter screen 210. In this way, when some dust falls to the driven shaft 222 under the action of its own weight, the dust suction pipe 630 is close to the bottom of the closed filter screen 210, so that the falling dust can be sucked together.

The specific structure and shape of the suction pipe 630 are not limited, and the number of the suction ports 610 formed therein is set as large as possible. As shown in fig. 11 to 14, in one example, the suction pipe 630 includes a first suction pipe 631, a plurality of second suction pipes 632 communicating with the first suction pipe 631, the second suction pipes 632 extending in a radial direction of the first suction pipe 631, and the plurality of second suction pipes 632 being distributed on a circumferential surface of the first suction pipe 631 in an axial direction of the first suction pipe 631. Wherein, at least the end of the second suction pipe 632 is provided with a dust suction port 610. The circumferential surface of the first suction pipe 631 may be provided with a dust suction port 610.

In operation, the second suction pipes 632 suck the dust inside into the first suction pipes 631, the dust entering the first suction pipes 631 is sucked away from the two ends of the first suction pipes 631 by the negative pressure assembly 620, and the air flow direction is shown by the arrows in fig. 14. In this manner, the first suction pipe is not easily clogged, and the entire cleaning effect is not affected even if one of the second suction pipes 632 is clogged.

As shown in fig. 15 and 16, illustrating an inner collecting structure in a fodder dryer according to another embodiment of the present invention. Wherein fig. 15 illustrates a schematic view of the structure of the fodder dryer shown in fig. 1, in which the heat exchanger 200 and the drying chamber 300 are omitted, when only the inner collecting means are provided. The main difference between the internal collection device of this embodiment and the internal collection device of the embodiment shown in fig. 7 is the arrangement of the suction opening. The following description focuses on the above-mentioned differences.

As already mentioned above, the driving shaft 221 and the driven shaft 222 may only support the rotating shaft, or the driving shaft 221 may serve as both the supporting rotating shaft and the driving shaft for driving the closed filter screen to rotate.

As shown in fig. 17, in the present embodiment, the driving shaft 221 and the driven shaft 222 for supporting the rotating shaft are hollow shafts, and the driving shaft 221 and the driven shaft 222 are provided with dust suction ports 610. The negative pressure module 620 includes an air pump 621, a collecting pipe 622, two driving shaft connecting pipes 624, and two driven shaft connecting pipes 625, the two driving shaft connecting pipes 625 connecting both ends of the driving shaft 221 to the collecting pipe 622, and the two driven shaft connecting pipes 625 connecting both ends of the driven shaft 222 to the collecting pipe 622. The air pump 621 may be other device capable of generating suction, such as a fan. In other examples, the two ends of the driving shaft 221 may be independently connected with the negative pressure assembly 620; it is also possible that one end of the drive shaft 221 is closed and the other end is connected to the negative pressure assembly 620. Similarly, the two ends of the driven shaft 222 can be independently connected with the negative pressure assemblies 620; alternatively, the driven shaft 222 may be closed at one end and connected to the negative pressure assembly 620 at the other end.

Further, as shown in fig. 15 and 17, on the same side of the closed filter screen 210, the driving shaft connection 624 and the driven shaft connection 625 share an end portion, which is connected to the collecting pipe 622. Of course, the driving shaft connection 624 and the driven shaft connection 625 may be connected to the collecting pipe 622 independently of each other.

In other embodiments, either the drive shaft 221 or the driven shaft 222 is provided with a dust suction port 610. In one example, only the driving shaft 221 is provided with the dust suction port 610, and only the driving shaft 221 is provided with the negative pressure assembly 620.

In the above embodiment, by providing the inner collecting means 60, the dust on the inner surface and the inner side of the closed filter 210 is sucked from the inner side of the closed filter 210, thereby effectively cleaning the closed filter 210.

Based on the design of the self-cleaning device 100 for the filter screen of the feed dryer in the above embodiments, an embodiment of the present invention further provides a feed dryer. As shown in fig. 1, the fodder dryer includes a heat exchanger 200, a drying chamber 300, and the above-mentioned filter screen self-cleaning device, wherein the drying chamber 300 is communicated with the air outlet 112 of the air inlet channel 110, and the heat exchanger 200 is disposed in the air inlet channel 110 and between the air outlet 112 and the closed filter screen 210.

When the feed dryer works, the filter screen self-cleaning device can realize non-stop cleaning, and ensures that gas heated by the heat exchanger 200 is clean gas filtered by the filter screen assembly 20, so that the work of the heat exchanger 200 cannot be influenced, and the quality of feed cannot be influenced.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a fodder drying-machine filter screen is from cleaning device which characterized in that includes:

the air inlet channel is arranged on the frame;

the filter screen assembly is arranged on the frame and comprises a closed filter screen and a supporting rotating shaft, and the closed filter screen can rotate around the supporting rotating shaft in a circulating manner;

the internal collecting device comprises a dust suction port and a negative pressure component, the negative pressure component is communicated with the dust suction port, and the dust suction port is arranged on the inner side of the closed filter screen.

2. The self-cleaning device for filter screen of fodder dryer as claimed in claim 1, wherein the inner collection device comprises a dust suction pipe located inside the closed filter screen, the dust suction opening is opened on the dust suction pipe, and the dust suction pipe is communicated with the negative pressure assembly.

3. The self-cleaning device for filter screen of fodder drying machine according to claim 2, wherein the bottom of the closed filter screen is close to the bottom of the air intake passage, and the dust suction pipe is close to the bottom of the closed filter screen.

4. The filter screen self-cleaning device of claim 2, wherein the suction pipe comprises a first suction pipe, a plurality of second suction pipes communicated with the first suction pipe, the second suction pipes extend along a radial direction of the first suction pipe, and the plurality of second suction pipes are distributed on a circumferential surface of the first suction pipe along an axial direction of the first suction pipe.

5. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 1, wherein the supporting shaft is a hollow shaft, the dust suction port is opened on the supporting shaft, and the supporting shaft is communicated with the negative pressure assembly.

6. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 5, wherein the supported rotating shaft comprises a driving shaft and a driven shaft, the driving shaft and the driven shaft are mounted on the frame, the closed filter screen is supported by the driving shaft and the driven shaft, the self-cleaning device for the filter screen of the feed dryer further comprises a driving assembly, the driving assembly is connected with the driving shaft, the driving shaft is used for driving the closed filter screen to rotate circularly, at least one of the driving shaft and the driven shaft is a hollow shaft, the dust suction port is opened on the outer surface of the hollow shaft, and two ends of the hollow shaft are communicated with the negative pressure assembly.

7. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 1, wherein the closed filter screen has an extended end extending out of the air intake passage, and further comprising a blowing device including an air port provided at one side of the extended end of the closed filter screen and capable of blowing air toward an outer surface of the extended end.

8. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 7, further comprising a negative pressure cleaning device, wherein the negative pressure cleaning device comprises a dust hood which is arranged at the other side of the extending end of the closed filter screen and is opened towards the extending end, and a negative pressure device which is communicated with the dust hood.

9. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 7, further comprising a scraping device, wherein the scraping device comprises a scraping portion disposed at the other side of the extended end, and the scraping portion is attached to the outer surface of the extended end.

10. A feed dryer, comprising a self-cleaning device for a filter screen of a feed dryer according to any one of claims 1 to 9, the feed dryer further comprising a drying chamber and a heat exchanger, wherein the drying chamber is in communication with an air outlet of the air intake passage, and the heat exchanger is disposed in the air intake passage between the air outlet and the closed filter screen.