CN113289431A

CN113289431A - Fodder drying-machine and filter screen self-cleaning device thereof

Info

Publication number: CN113289431A
Application number: CN202110149479.5A
Authority: CN
Inventors: 裴照辉; 张季伟
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: 2021-08-24

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 swing mechanism, the swing mechanism is used for driving the closed filter screen to rotate circularly, the closed filter screen is arranged in an air inlet channel, and the closed filter screen is provided with an extending end extending out of the air inlet channel; a burner including a nozzle positioned at one side of the protruding end, the nozzle for spraying a flame toward a predetermined region of the protruding end. The burner sprays flame to the extending end of the closed filter screen, and the closed filter screen is always in a rotating state, so that the closed filter screen can be continuously cleaned as long as the extending end is cleaned; and the closed filter screen filters in the air inlet channel all the time, thereby realizing automatic cleaning without stopping. A fodder drying-machine is still proposed.

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 exhausted by 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 swing mechanism, the swing mechanism is used for driving the closed filter screen to rotate circularly, the closed filter screen is arranged in an air inlet channel, and the closed filter screen is provided with an extending end extending out of the air inlet channel;

a burner including a nozzle positioned at one side of the protruding end, the nozzle for spraying a flame toward a predetermined region of the protruding end.

After the feed dryer is started, when the closed filter screen works for a period of time and particles or dust are adhered on the closed filter screen, the rotary mechanism drives the closed filter screen to rotate circularly, the closed filter screen is in a rotating state, and the combustor sprays flame to the extending end of the closed filter screen to burn and clean the dust attached to the extending end. Because the closed filter screen is always in a rotating state, the closed filter screen can be continuously cleaned as long as the extending end is cleaned; and the closed filter screen is always used for filtering in the air inlet channel, so that the automatic cleaning without stopping is realized.

In one embodiment, the self-cleaning device for the filter screen of the feed dryer further comprises a blowing device, the blowing device comprises an air opening, the air opening and the nozzle are arranged on the same side of the extending end, and the air opening is used for blowing air flow to the preset area.

In one embodiment, the dust collecting device further comprises a dust collecting box, and an opening of the dust collecting box is opposite to the air port and is used for collecting dust in the preset area.

In one embodiment, the dust collecting device further comprises a negative pressure device, and the negative pressure device is communicated with the dust collecting box.

In one embodiment, the end of the extending end is a horizontal section, and the horizontal section is arranged along the horizontal direction; the nozzle and the air port are positioned above the horizontal section and are sequentially far away from the tail end of the horizontal section, the dust collection box comprises a blocking wall and a cavity body connected with the blocking wall, the cavity body is positioned below the horizontal section, and the blocking wall is positioned on one side of the tail end of the horizontal section.

In one embodiment, the swing mechanism comprises a driving shaft, a driven shaft and a driving assembly, wherein the driving assembly, the driving shaft and the driven shaft are mounted on the frame, the driving assembly is connected with the driving shaft, the closed filter screen is supported on the driving shaft and the driven shaft, and the driving shaft is used for driving the closed filter screen to rotate circularly; wherein the protruding end is supported by the drive shaft.

In one embodiment, the two sides of the frame are provided with support frames, the two ends of the driving shaft are rotatably supported on the support frames, the two sides of the frame are further provided with mounting frames, the frame further comprises an auxiliary shaft rotatably mounted on the mounting frames, the horizontal section is sleeved on the auxiliary shaft, and the axis of the auxiliary shaft and the axis of the driving shaft are in the same horizontal plane.

In one embodiment, said blowing means comprises a plurality of blowing tubes spaced apart from said nozzle, each blowing tube having a plurality of said ports.

In one embodiment, the burner further comprises a combustion fan, an electromagnetic valve and a gas pipeline for connecting gas, the gas pipeline is communicated with the nozzle, the combustion fan and the electromagnetic valve are both connected to the gas pipeline, and the electromagnetic valve is used for cutting off the gas pipeline in a delayed mode.

The utility model provides a feed dryer, includes feed dryer filter screen automatically cleaning device, feed dryer 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.

Figure 3 is a schematic view of the blowing device of figure 1.

Fig. 4 is a schematic structural diagram of the negative pressure cleaning device in fig. 1.

Fig. 5 and 6 are schematic views of the installation manner of the closed filter screen in the self-cleaning filter device according to an embodiment of the invention.

Fig. 7 and 8 are schematic views of the burner of fig. 1 from different angles.

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 burner; 310. a nozzle; 320. a combustion fan; 330. a second solenoid valve; 340. a gas pipeline; 350. a manual ball valve;

40. a blowing device; 410. air bags; 420. an air tube; 430. a pneumatic link; 440. a first solenoid valve; 450. a blowing pipe; 451. a gas port;

50. a dust collection device; 510. a dust collecting box; 511. a retaining wall; 512. a cavity; 520. a negative pressure device; 521. an air suction pipe; 522. a fan;

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 burner 30, wherein the burner 30 is used for spraying flame to the filter screen in the filter screen assembly 20 to burn and clean particles or dust attached to the filter screen, thereby achieving an effect of automatic cleaning without stopping the machine.

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 burner 30 includes a nozzle 310 provided at one side of the protruding end 211, and the nozzle 310 is used to spray a flame toward a predetermined area of the protruding end 211 to burn and clean dust attached to the closed filter screen 210.

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 is operated for a period of time and particles or dust are adhered thereon, 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 nozzle 310 of the burner 30 sprays flame toward the protruding 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, 5 and 6, 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.

The nozzle 310 of the burner 30 sprays a flame to the protruding end 211 of the closed filter screen 210, and then burns and cleans the dust on the closed filter screen 210, and the dust is formed after the dust is burnt. The dust falls off with the circulation of the closed filter 210, but if the dust is in a large amount, the dust may be partially brought into the air intake passage, thereby affecting the filtering effect of the closed filter 210.

In view of the above problems, as shown in fig. 1 and 3, the self-cleaning device for the filter screen of the feed dryer further comprises a blowing device 40, wherein the blowing device 40 comprises an air port 451, the air port 451 and the nozzle 310 of the burner 30 are arranged on the same side of the extended end 211, and the air port 451 is used for blowing air flow to a predetermined area of the extended end 211, so that dust formed by burning particles or dust on the extended end 211 can be blown off from the extended end 211, thereby achieving a good cleaning effect and ensuring the filtering effect of the closed filter screen 210. The predetermined region here may be the entire region or a partial region of the outer surface of one side of the protruding end 211.

As shown in fig. 3, in one example, the blowing device 40 includes an air bag 410, an air pipe 420 connected to the air bag 410, a pneumatic link 430, a first electromagnetic valve 440, and three blowing pipes 450 connected to the air pipe 420 in this order, a gas port 451 is provided in each blowing pipe 450, and compressed gas is blown out from the gas port of each blowing pipe 450 through the air pipe 420 via the pneumatic link 430 and the first electromagnetic valve 440. The pneumatic coupling 430 is used for filtering impurities in the compressed gas, and the first solenoid valve 440 is used for controlling the size of the compressed gas. The compressed gas source may be a gas bag or other source that can produce compressed gas. It is to be understood that the number of the blowing pipes 450 is not limited to three, and may be more than three, or less than three. The plurality of injection pipes 450 are spaced apart from each other in a direction away from the nozzle 310 of the burner 30. Each blowing tube 450 is provided with a plurality of gas ports 451 along the axial direction thereof. The axial direction of the blowing pipe 450 coincides with the width direction of the closed filter mesh 210. In addition, air port 451 may also be an elongated slot having a length not less than the width of closed filter screen 210.

Specifically, the air port 451 is obliquely opposite to the extending end 211, and the air flow sprayed from the air port 451 can be just blown to the predetermined area. The blowing pipe 450 is supported and fixed to the frame 10. For example, the blowing pipe 450 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 450 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 nozzle 310 of the burner 30 sprays flame to the extension end 311 to burn the attached dust into dust, and the blowing device 40 blows air flow to the extension end 211, so that the dust formed by dust burning on the extension end 211 can be blown off from the extension end 211, and a good cleaning effect is achieved.

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. 3, the dust collecting device 50 further includes a dust collecting device 50, wherein the dust collecting device 50 includes a dust collecting box 510, and an opening of the dust collecting box 510 is opposite to the air opening 451 for collecting dust in a predetermined area. Thus, the airflow from the air port 451 can just blow the dust in the predetermined area to the dust collecting box 510, thereby avoiding the environmental pollution.

Further, in order to prevent the dust collected in the dust collecting box 510 from overflowing due to excessive dust, the dust collecting device further comprises a negative pressure device 520, and the negative pressure device 520 is communicated with the dust collecting box 510. The negative pressure device 520 generates an attractive force in the dust box 510, and can timely transfer away the dust collected in the dust box 510. In one example, the negative pressure device 520 includes a suction pipe 521 and a fan 522, wherein one end of the suction pipe 521 is connected to the fan 522, and the other end is connected to the dust collection box 510.

In order to enable the dust box 510 to efficiently collect dust on the protruding end 211, in one embodiment, as shown in fig. 5 and 6, the end of the protruding end 211 of the closed filter screen 210 is provided as a horizontal section 213, and the horizontal section 213 is arranged in a horizontal direction. The nozzle 310 and the air port 541 are positioned above the horizontal section 213 and are sequentially far away from the end of the horizontal section 213; the dust collecting box 510 comprises a blocking wall 511 and a cavity 512 connected with the blocking wall 511, wherein the cavity 512 is located below the horizontal section 213, and the blocking wall 511 is located at one side of the end of the horizontal section 213. The end of the horizontal segment 213 refers to the end of the horizontal segment 213 that is away from the remainder of the closed filter screen 210 other than the horizontal segment.

By the means, the flame sprayed by the nozzle 310 burns and cleans dust on the horizontal section; the blowing device 40 blows dust formed by burning the dust toward the dust collecting box 510 and is blocked by the blocking wall 511, so that the dust can fall into the cavity 512 completely, and the environment pollution is avoided.

In an example, the horizontal segment 213 is formed as follows, and as shown in fig. 1, 5 and 6, the frame 10 is further provided with mounting brackets 250 on both sides of the top thereof, and the auxiliary shaft 260 is rotatably mounted on the mounting brackets 250. The axis of the auxiliary shaft 260 is in the same horizontal plane as the axis of the drive shaft 221. The bottom end of the closed filter screen 210 is sleeved on the driven shaft 222, and the extension end 211 bypasses the driving shaft 221 and then is sleeved on the auxiliary shaft 260, so that a part of the extension end 211 extends horizontally instead of vertically upwards to form a horizontal section 213. The cyclical rotation of the closed filter screen 210 is driven by the rotation of the drive shaft 221.

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.

The closed filter screen 210 needs to rotate circularly and be burned by flame, so the material is preferably made of flame-retardant material. In one example, the closed filter 210 is made of stainless steel wire.

In addition, the closed filter screen 210 functions to filter dust in the outside air, has smaller meshes, and has finer grid lines, i.e. smaller filament diameter, and cannot withstand long-time flame ablation.

In order to solve the above problem, as shown in fig. 7 and 8, in an embodiment, the burner 30 is a linear burner, and includes a combustion fan 320, a second electromagnetic valve 330, and a gas pipeline 340 for connecting gas, the gas pipeline 340 is communicated with the nozzle 310, the combustion fan 320 and the second electromagnetic valve 330 are both connected to the gas pipeline 340, and the second electromagnetic valve 330 is used for cutting off the gas pipeline 340 in a delayed manner. In other words, the second solenoid valve 330 can generate an intermittent flame to burn and clean the dust attached to the protruding end 211. The combustion medium of the burner 30 is natural gas, liquefied petroleum gas, etc., and the corresponding gas pipeline is used for communicating a natural gas source, liquefied petroleum gas, etc.

The working process of the self-cleaning device of the above embodiment is as follows: the closed filter screen 210 rotates towards the dust box (i.e. the upper surface of the horizontal section 213 moves towards the direction of the blocking wall 511 of the dust box 510), then the second electromagnetic valve 330 is opened, the natural gas or the liquefied petroleum gas enters the nozzle 310 of the burner 30 through the gas pipeline, simultaneously the combustion fan 320 is opened to supplement fresh air, the natural gas or the liquefied petroleum gas and the air are mixed and then are combusted to generate flame, and then the dust on the filter screen is cleaned by flame combustion. Since the filter net is fine in wire diameter and the like and cannot withstand long-time flame ablation, the gas can be shut off and the flame of the nozzle 310 of the burner 30 can be extinguished in a short time by using the second solenoid valve 330.

After the blowing device 40 is started, on one hand, the flame on the burning dust is quickly extinguished by the airflow blown out from the air port 451, so that the closed filter screen 210 is quickly cooled to meet the requirement of the closed filter screen 210 on circulating rotation, and the burning dust is prevented from entering the dryer; on the other hand, the airflow from the air port 451 blows the dust into the dust collecting box of the dust collecting device 50, and then is sucked away by the blower 522 through the air suction pipe 521, thereby achieving effective cleaning of the closed filter screen 210 and avoiding environmental pollution.

As shown in fig. 7 and 8, the burner 30 further includes a manual ball valve 350 connected to the gas pipe 340. The manual ball valve 350 is in a normally open state for closing the gas pipe when the second solenoid valve 330 and the like are serviced.

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;

2. The feed dryer filter screen self-cleaning apparatus as claimed in claim 1, further comprising a blowing device, said blowing device comprising an air port, said air port and said nozzle being disposed on the same side of said protruding end, said air port being for blowing an air stream toward said predetermined area.

3. The self-cleaning device for filter screen of fodder dryer as claimed in claim 2, further comprising a dust collecting device comprising a dust collecting box having an opening opposite to the air port for collecting dust of the predetermined area.

4. The self-cleaning device for filter screen of fodder dryer as claimed in claim 3, wherein the dust collecting device further comprises a negative pressure device, the negative pressure device is communicated with the dust collecting box.

5. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 3, wherein the end of the protruding end is a horizontal section, and the horizontal section is arranged along the horizontal direction; the nozzle and the air port are positioned above the horizontal section and are sequentially far away from the tail end of the horizontal section, the dust collection box comprises a blocking wall and a cavity body connected with the blocking wall, the cavity body is positioned below the horizontal section, and the blocking wall is positioned on one side of the tail end of the horizontal section.

6. The self-cleaning device for the filter screen of the fodder drying machine as claimed in claim 5, wherein the swing mechanism comprises a driving shaft, a driven shaft, and a driving assembly, the driving shaft and the driven shaft are mounted on the frame, the driving assembly is connected with the driving shaft, the closed filter screen is supported on the driving shaft and the driven shaft, and the driving shaft is used for driving the closed filter screen to rotate circularly; wherein the protruding end is supported by the drive shaft.

7. The self-cleaning device for the filter screen of the fodder drying machine as claimed in claim 6, wherein the frame is provided with support frames at both sides thereof, the driving shaft is rotatably supported at both ends thereof, the frame is further provided with mounting frames at both sides thereof, and further comprising an auxiliary shaft rotatably mounted to the mounting frames, the horizontal section is sleeved on the auxiliary shaft, wherein the axis of the auxiliary shaft and the axis of the driving shaft are in the same horizontal plane.

8. The self-cleaning apparatus of claim 2, wherein said blowing device comprises a plurality of blowing tubes spaced apart from said nozzle, each blowing tube having a plurality of said air ports.

9. The self-cleaning device for the filter screen of the feed dryer as claimed in claim 1, wherein the burner further comprises a combustion fan, an electromagnetic valve and a gas pipeline for connecting gas, the gas pipeline is communicated with the nozzle, the combustion fan and the electromagnetic valve are both connected to the gas pipeline, and the electromagnetic valve is used for cutting off the gas pipeline in a delayed manner.

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.