Dust recovery device for animal feed processing

Abstract

A dust recovery device for animal feed processing comprises a pulse bag-type dust collector shell, an air inlet pipe hole and an air outlet pipe hole are formed in the pulse bag-type dust collector shell, a turnable sealing cover is installed on the pulse bag-type dust collector shell, an electromagnetic pulse valve is installed on the sealing cover, and the electromagnetic pulse valve is connected with the pulse bag-type dust collector shell. The electromagnetic pulse valve is provided with a plurality of pulse pipelines, the pulse bag-type dust collector shell is provided with at least one slidable keel group, the keel group is composed of an upper keel and a lower keel, the upper keel and the lower keel are provided with dust collection bags, and dust-containing gas is injected into the pulse bag-type dust collector shell from an air inlet pipe hole. Under the action of the electromagnetic pulse valve and the pulse pipeline, dust is filtered on the dust removal bag, clean air is discharged from the air outlet pipe hole, the dust removal bag can be synchronously brought out through automatic movement of the keel set, the effect of regular replacement is achieved, manual operation steps are reduced, and the replacement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of feed dust recovery, and in particular to a dust recovery device for animal feed processing. Background Art

[0002] Animal feed refers to food or raw materials provided to animals (including livestock, poultry, aquatic products, pets, etc.) to meet their nutritional needs and promote healthy growth. Scientifically formulated feed can meet the protein, energy, vitamin and mineral needs of animals at different growth stages. By optimizing the formula, waste can be reduced, the feed conversion rate (FCR) can be improved, and breeding costs can be reduced.

[0003] The processing of animal feed involves the following basic steps: raw material receiving, crushing, batching, mixing, granulation, cooling, and collection. During the crushing process, the hammer mill uses high-speed rotating hammers to strike the raw materials, which inevitably generates a large amount of dust. This is especially true when fine particle size is required. The mixing and throwing of various raw materials can also cause dust to fly, especially when trace components (such as vitamins and minerals) are added.

[0004] When dust reaches a certain concentration in the air (usually 20-50g / m³) and encounters a fire source, it may cause an explosion; long-term inhalation of feed dust by relevant personnel may cause workers to suffer from occupational diseases such as pneumoconiosis, and dust deposition on the surface of equipment will affect heat dissipation, accelerate mechanical wear, cause electrical equipment short circuits, and affect production efficiency and product quality. Therefore, dust recovery is necessary.

[0005] Conventional feed mills use pulse bag dust collectors to recycle dust. During daily use, the bags inside the pulse bag dust collectors are used to filter dust and need to be replaced regularly. During the bag replacement process, workers need to manually pull out the keel inside the bag and then take it out together with the bag, which consumes manpower and has low replacement efficiency.

[0006] Therefore, this device proposes a dust recovery device for animal feed processing to achieve automatic ejection of keels and improve replacement efficiency. Summary of the Invention

[0007] In response to the problems raised in the background art, the present invention provides a dust recovery device for animal feed processing to solve the problems. The present invention will be further explained below.

[0008] A dust recovery device for animal feed processing includes a pulse bag dust collector shell, the pulse bag dust collector shell is provided with an air inlet pipe hole and an air outlet pipe hole, the pulse bag dust collector shell is installed with a flip-up closing cover, the closing cover is installed with an electromagnetic pulse valve, the electromagnetic pulse valve is provided with multiple pulse pipes, the pulse bag dust collector shell is provided with at least one set of slidable keel groups, the keel group consists of an upper keel and a lower keel, and dust bags are provided on the upper keel and the lower keel.

[0009] Preferably, a support frame is provided on the pulse bag dust collector shell, and a plurality of movable frames are provided on the support frame, an upper keel is clamped on the movable frame, a lower keel is provided on the upper keel, the upper keel and the lower keel are nested and slidably connected, a dust bag is provided outside the skeleton of the upper keel and the lower keel, and a mounting frame is provided on the support frame, and the mounting frame is placed between the support frame and the pulse bag dust collector shell, and a second servo motor is provided on the mounting frame, a screw is keyed to the second servo motor, and a driving block is provided on the screw, and the driving block is squeezed and matched with the movable frame to achieve the automatic ejection effect of the keel group.

[0010] Preferably, a first servo motor is installed on the mounting frame, a driving screw is keyed on the first servo motor, a slider is provided on the driving screw, and the slider is keyed to the second servo motor to realize the positioning action of each movable frame.

[0011] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The tooth on the attachment piece is meshed with tooth on upper sprocket.

[0012] Preferably, the pulse bag dust collector shell is provided with a plurality of unlocking hooks, the number of the unlocking hooks matches the upper keel, and all are arranged on the top side of the upper keel. The unlocking hooks cooperate with the lower keel to enable the clamping frame to cancel the clamping of the bottom of the dust bag.

[0013] Preferably, two symmetrically distributed guide frames are provided on the pulse bag dust collector shell, a lifting frame is provided between the two guide frames, a top column is provided on the lifting frame, a counterweight block is provided on the guide frame, the counterweight block is connected to the lifting frame by a pull rope, and the pull rope is connected to the guide frame in a through-type manner to achieve local bulge at the bottom of the dust bag.

[0014] Beneficial effects: Compared with the prior art, the present invention starts the screw, drive block and movable frame by the second servo motor, and moves the upper keel, lower keel and dust bag upward in linkage, so as to realize the automatic upward movement of the keel group to the top of the pulse bag dust collector shell, avoid manual operation and improve replacement efficiency; through the clamping assembly, the lower keel is first separated from the bottom of the dust bag, which is convenient for clamping the bottom of the dust bag; through the jacking assembly, before the clamping assembly is actuated, the bottom of the dust bag is partially raised in advance, which is convenient for the clamping frame to clamp the bottom of the dust bag, and then move together to the top of the pulse bag dust collector shell; through the unlocking assembly, the clamping assembly cancels the clamping of the dust bag, which is convenient for workers to replace the dust bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 : Schematic diagram of the structure of the sealing cover, electromagnetic pulse valve, pulse pipeline and other components of the present invention;

[0017] Figure 3 : Schematic diagram of the structure of the relevant components for realizing the automatic movement of the keel group in the present invention

[0018] Figure 4 : A schematic structural diagram of the first servo motor, slider, screw and other components of the present invention;

[0019] Figure 5 : A schematic structural diagram of the keel assembly of the present invention;

[0020] Figure 6 : A schematic structural diagram of the relevant components of the clamping assembly of the present invention;

[0021] Figure 7 : A schematic structural diagram of the present invention's connecting spring, connecting rack, guide rod and other related components;

[0022] Figure 8 : A schematic structural diagram of the clamping frame, rotating gear, synchronous belt and other related components of the present invention;

[0023] Figure 9 : A schematic structural diagram of the relevant components of the jacking assembly of the present invention;

[0024] In the figure: 1-pulse bag dust collector housing, 11-closing cover, 12-electromagnetic pulse valve, 13-pulse pipe, 14-driving screw, 141-mounting frame, 15-first servo motor, 151-second servo motor, 16-slider, 17-screw, 18-moving frame, 19-driving block, 110-lower keel, 111-upper keel, 112-dust bag, 113-support frame, 114-inlet pipe hole, 115-outlet pipe hole, 2-connecting frame, 201-guide column, 202-guide rod, 21-telescopic member, 22-reset spring, 23-clamping frame, 24-rotating gear, 25-connecting spring, 26-connecting rack, 27-synchronous belt, 28-synchronous wheel, 29-unlocking hook, 3-jacking column, 31-guide frame, 32-counterweight block, 33-pull rope, 34-jacking frame. DETAILED DESCRIPTION

[0025] Next, combine Figures 1-9 A specific embodiment of the present invention is described in detail.

[0026] refer to Figure 1-Figure 3 A dust recovery device for animal feed processing includes a pulse bag dust collector shell 1, the pulse bag dust collector shell 1 is respectively provided with an air inlet pipe hole 114 and an air outlet pipe hole 115, the pulse bag dust collector shell 1 is provided with a flip-up closing cover 11, the closing cover 11 is provided with an electromagnetic pulse valve 12, the electromagnetic pulse valve 12 is provided with a plurality of pulse pipes 13, the pulse bag dust collector shell 1 is provided with at least one set of slidable keels, the keel group is composed of an upper keel 111 and a lower keel 110, the upper keel The keel 111 and the lower keel 110 are provided with dust bags 112 for filtering dust. The dust bags 112 move with the keel group. The pulse pipe 13 is suspended on the top of the upper keel 111. The dust-laden gas is poured into the pulse bag dust collector shell 1 from the air inlet pipe hole 114. The dust is filtered on the dust bag 112 through the action of the electromagnetic pulse valve 12 and the pulse pipe 13, and the clean air is discharged from the air outlet pipe hole 115. The dust bag 112 can be synchronously brought out through the automated movement of the keel group, thereby achieving the effect of regular replacement, reducing manual operation steps, and improving replacement efficiency.

[0027] refer to Figure 3In order to realize the automatic movement of the keel group, a support frame 113 is fixedly connected to the inner cavity of the pulse bag dust collector shell 1, and at least one mobile frame 18 is slidably connected to the support frame 113. The mobile frame 18 is provided with multiple clamping units, and an upper keel 111 is clamped in each clamping unit. The bottom of the upper keel 111 is slidably connected to the lower keel 110, that is, the upper keel 111 and the lower keel 110 are nested and slidably connected. The upper keel 111 and the lower keel 110 cooperate to form a complete keel. The outer wall of the skeleton of the upper keel 111 and the lower keel 110 is provided with a dust bag 112. The upper keel 111 and the lower keel 110 serve as a support frame. The dust bag 112 is used to isolate particulate matter in the dust-laden gas to form a filtering channel.

[0028] The replacement of the dust bag 112 depends on the movement of the upper keel 111 and the lower keel 110. The movement of the upper keel 111 and the lower keel 110 depends on the action of the movable frame 18. In order to realize the movement of the movable frame 18, the two side walls of the support frame 113 are fixedly connected with a mounting frame 141. The mounting frame 141 is placed between the support frame 113 and the pulse bag dust collector housing 1. A second servo motor 151 is provided on the mounting frame 141. A screw 17 is keyed to the output shaft of the second servo motor 151. A driving block 19 is threadedly connected to the bottom of the screw 17. The top of the driving block 19 is squeezed and fitted with the bottom of the movable frame 18, so as to generate extrusion with the movable frame 18 through the action of the driving block 19, so as to lift the movable frame 18, thereby achieving the effect of lifting the upper keel 111.

[0029] Close the closure cover 11, and the dust-laden gas flows into the pulse bag dust collector housing 1 from the air inlet hole 114. The electromagnetic pulse valve 12 is activated, and the dust is filtered on the dust bag 112. The clean air is discharged from the air outlet hole 115.

[0030] During replacement, the closing cover 11 is opened, the second servo motor 151 is activated, the screw 17 rotates, the driving block 19 moves up and is squeezed with the movable frame 18, the movable frame 18 moves up in a controlled manner, and the upper keel 111, the lower keel 110 and the dust bag 112 are linked to move up, that is, the upper keel 111, the lower keel 110 and the dust bag 112 are separated from the support frame 113 as a whole, and the automatic movement of the keel group is realized through mechanical linkage, which avoids manual operation and improves the replacement efficiency.

[0031] As explained above, at least one mobile frame 18 is slidably connected to the support frame 113, and a plurality of snap-in units are provided on the mobile frame 18. The snap-in units are each equipped with a dust bag 112 and a keel group. The core purpose is to realize the flexible layout and efficient collaborative work of the modular filter unit. At the same time, the dust bags 112 in the plurality of snap-in units independently undertake the task of intercepting particulate matter in a local area, allowing the dust bag 112 on each mobile frame 18 to be disassembled and replaced, in order to realize the individual replacement of the dust bags 112 on each mobile frame 18. For independent positioning and replacement, a first servo motor 15 is installed on the mounting frame 141, and a driving screw rod 14 is key-connected to the first servo motor 15, and a slider 16 is threadedly connected to the driving screw rod 14. The slider 16 is key-connected to the second servo motor 151, and is intended to position the movable frame 18 one by one through the slider 16, and then lift and replace the upper keel 111, lower keel 110 and dust bag 112 on the positioned movable frame 18, so as to achieve the effect of orderly replacement of the dust bag 112.

[0032] During the replacement process, the mobile racks 18 are first positioned one by one, and then the positioned mobile racks 18 are individually lifted and replaced. The complete steps of this process are as follows: the first servo motor 15 is activated first, driving the screw rod 14 to rotate, and the slider 16 is moved in a controlled manner to position the mobile racks 18 one by one. The second servo motor 151, the screw rod 17 and the mobile rack 18 move with the slider 16.

[0033] Then the first servo motor 15 is turned off and the second servo motor 151 is started. The screw 17 rotates, the driving block 19 moves up and squeezes with the positioned movable frame 18. The movable frame 18 moves up in a controlled manner, and the upper keel 111, the lower keel 110 and the dust bag 112 move up in conjunction. That is, the upper keel 111, the lower keel 110 and the dust bag 112 are separated from the support frame 113 as a whole, so as to achieve the effect of individually positioning and replacing the dust bags 112 on each movable frame 18.

[0034] In particular, the first servo motor 15 and the second servo motor 151 in this device are independently arranged outside the support frame 113, in order to prevent the dust-laden gas inside the support frame 113 from interfering with the operation of the first servo motor 15 and the second servo motor 151 and the operation of related linkage components.

[0035] The upper keel 111, the lower keel 110 and the dust bag 112 are moved upwards in order to move the dust bag 112 to the top of the pulse bag dust collector housing 1 for replacement. The dust bag 112 needs to be separated from the upper keel 111 and the lower keel 110 for replacement. This device uses a clamping assembly to separate the bottom of the dust bag 112 from the lower keel 110 before the upper keel 111, the lower keel 110 and the dust bag 112 are moved upwards, and then they are moved upwards together to a higher place and then further separated.

[0036] refer to Figure 6The clamping assembly includes a connecting frame 2 that is clamped to the bottom of the lower keel 110. The number of the connecting frame 2 matches the number of the moving frame 18, and the connecting frame 2 is contact-connected to the top of the moving frame 18.

[0037] refer to Figure 8 The bottom of the upper keel 111 is fixed with two symmetrically distributed guide columns 201, and two symmetrically distributed synchronous wheels 28 are connected to the guide columns 201. The synchronous wheels 28 are fixed with a rotating gear 24. The bottom of the connecting frame 2 is rotatably connected with two symmetrically distributed clamping frames 23. The clamping frames 23 are used to clamp the bottom of the dust removal bag 112. A synchronous belt 27 is provided between the clamping frame 23 and the synchronous wheel 28. The rotation of the synchronous wheel 28 is transmitted to the clamping frame 23 through the synchronous belt 27.

[0038] The rotation of the synchronous wheel 28 depends on the rotation of the rotating gear 24. In order to realize the rotation of the rotating gear 24, two symmetrically distributed connecting racks 26 are fixed to the bottom of the connecting frame 2. The connecting racks 26 are engaged with the rotating gear 24. The connecting frame 2 passes through the bottom of the upper keel 111 and extends downward. A guide rod 202 is fixed to the bottom of the connecting frame 2. A connecting spring 25 is compressed between the connecting frame 2 and the upper keel 111, and the connecting spring 25 is wound around the guide rod 202.

[0039] refer to Figure 7 Two symmetrically distributed telescopic parts 21 are fixed to the connecting frame 2, and a return spring 22 is compressed between the telescopic end of the telescopic part 21 and the connecting frame 2. Two symmetrically distributed slides are opened on the mobile frame 18, and an inclined surface is provided at the slide opening. A section of the connecting frame 2, the telescopic part 21 and the return spring 22 are all slidably connected in the slide of the mobile frame 18, and the telescopic part of the telescopic part 21 protrudes from the slide opening of the mobile frame 18. The telescopic part of the telescopic part 21 can be squeezed and matched with the top of the driving block 19, that is, when the driving block 19 moves up, the telescopic part of the telescopic part 21 is squeezed first, and then the mobile frame 18 is squeezed.

[0040] As the driving block 19 moves upward, the telescopic part of the telescopic member 21 is squeezed first, the telescopic part of the telescopic member 21 moves upward, the return spring 22 is deformed, the telescopic member 21 moves upward, the connecting frame 2 moves upward in a controlled manner, and the lower keel 110, the guide rod 202 and the connecting rack 26 move upward synchronously, the lower keel 110 moves upward and disengages from the bottom of the dust bag 112. At this time, the upper keel 111 and the guide column 201 remain stationary. The focus of this step is that the telescopic part of the telescopic member 21 is squeezed by the driving block 19, so that the lower keel 110 moves up a distance in advance, that is, the lower keel 110 first disengages from the bottom of the dust bag 112, avoiding the clamping action of the subsequent clamping frame 23.

[0041] As the connecting rack 26 moves upward and engages with the rotating gear 24, the rotating gear 24 rotates, and the synchronous wheel 28 rotates in a controlled manner. Under the action of the synchronous belt 27, the two clamping frames 23 rotate toward each other to clamp the bottom of the dust removal bag 112.

[0042] The telescopic part of the telescopic member 21 moves up to the slide opening of the mobile frame 18, that is, the telescopic part of the telescopic member 21 is flush with the slide opening of the mobile frame 18. At this time, the driving block 19 continues to move upward, while squeezing the telescopic member 21 and the mobile frame 18, so that the mobile frame 18, the squeezed telescopic member 21 and the connecting frame 2 move up at the same rate. At this time, the upper keel 111, the guide column 201, the rotating gear 24, the synchronous wheel 28, the synchronous belt 27, the two clamping frames 23, the lower keel 110, and the dust bag 112 move up at an equal rate, that is, the two clamping frames 23 maintain the clamping state of the bottom of the dust bag 112 and move up.

[0043] The dust bag 112 moves up to the top of the pulse bag dust collector housing 1, and the clamping state of the two clamping frames 23 on the bottom of the dust bag 112 needs to be released to facilitate workers to peel off and replace the dust bag 112. Therefore, this device uses an unlocking component to achieve the clamping action of the two clamping frames 23 on the bottom of the dust bag 112.

[0044] refer to Figure 3 The unlocking component includes a plurality of unlocking hooks 29 detachably connected to the top of the pulse bag dust collector housing 1. The number of the unlocking hooks 29 matches the upper keel 111, and they are all arranged on one side of the top of the upper keel 111. The unlocking hooks 29 can cooperate with the lower keel 110. The cooperation between the unlocking hooks 29 and the lower keel 110 enables the clamping frame 23 to cancel the clamping of the dust bag 112.

[0045] When the upper keel 111, the lower keel 110, and the dust bag 112 move up to the top of the pulse bag dust collector housing 1, the lower keel 110 engages with the unlocking hook 29. Due to the restriction of the unlocking hook 29, the lower keel 110 no longer moves up, that is, the lower keel 110 remains stationary, and the linkage guide rod 202 and the connecting rack 26 remain stationary. At this time, the upper keel 111 continues to move up, that is, the guide column 201, the synchronous wheel 28, the rotating gear 24, and the clamping frame 23 move up. The rotating gear 24 moves up and engages with the connecting rack 26 in the opposite direction, driving the two clamping frames 23 to flip in the opposite direction, and then the two clamping frames 23 cancel the clamping of the bottom of the dust bag 112. At this time, the lower keel 110 has canceled its support for the bottom of the dust bag 112, thereby facilitating the worker to manually remove the dust bag 112 from the upper keel 111 and the lower keel 110.

[0046] refer to Figure 9Before the two clamping frames 23 clamp the bottom of the dust bag 112, the device uses a lifting assembly to partially bulge the bottom of the dust bag 112 to facilitate the clamping of the two clamping frames 23. The lifting assembly includes two symmetrically distributed guide frames 31 installed in the pulse bag dust collector shell 1, and a lifting frame 34 is slidably connected between the two guide frames 31. The lifting frame 34 is provided with a top column 3 that can cooperate with the lower keel 110. The purpose is to realize the movement of the top column 3 by moving the lifting frame 34, and utilize the jacking effect of the top column 3 on the bottom of the dust bag 112 to achieve a local bulge effect on the bottom of the dust bag 112.

[0047] A counterweight block 32 is slidably connected to the guide frame 31 , and the counterweight block 32 is connected to the lifting frame 34 by a certain length of pull rope 33 , and the pull rope 33 is connected to the guide frame 31 in a through-type manner, so as to achieve the opposite movement effect of the counterweight block 32 and the lifting frame 34 through the pull rope 33 .

[0048] When the keel assembly is installed, the lower keel 110 moves downward to abut against the top column 3 on the lifting frame 34, that is, it is installed in place. At this time, the lower keel 110 and the top column 3 on the lifting frame 34 are squeezed and maintain this squeezing state. The lifting frame 34 moves downward, and under the action of the pull rope 33, the counterweight block 32 moves upward.

[0049] During replacement, the telescopic part of the telescopic member 21 is squeezed by the driving block 19, so that the lower keel 110 moves up a distance in advance, that is, the lower keel 110 is first disengaged from the bottom of the dust bag 112, and the lower keel 110 moves up and disengages the squeezing of the top column 3 on the jacking frame 34. Under the action of the counterweight block 32, the top column 3 on the jacking frame 34 moves up, and the top column 3 on the jacking frame 34 moves up to lift the bottom of the dust bag 112, that is, the bottom of the dust bag 112 is partially raised. Subsequently, the connecting rack 26 moves up and meshes with the rotating gear 24, the rotating gear 24 rotates, and the synchronous wheel 28 rotates in a controlled manner. Under the action of the synchronous belt 27, the two clamping frames 23 rotate toward each other to clamp the bottom of the dust bag 112, thereby realizing the clamping action of the clamping frame 23.

[0050] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A dust recovery device for animal feed processing, comprising a pulse bag dust collector housing (1), the pulse bag dust collector housing (1) being provided with an air inlet pipe hole (114) and an air outlet pipe hole (115), the pulse bag dust collector housing (1) being provided with a reversible closing cover (11), the closing cover (11) being provided with an electromagnetic pulse valve (12), the electromagnetic pulse valve (12) being provided with a plurality of pulse pipes (13), and characterized in that: The pulse bag dust collector housing (1) is provided with at least one slidable keel group, the keel group consisting of an upper keel (111) and a lower keel (110), and dust bags (112) are provided on the upper keel (111) and the lower keel (110).

2. The dust recovery device for animal feed processing according to claim 1, characterized in that: The pulse bag dust collector shell (1) is provided with a support frame (113), and the support frame (113) is provided with multiple movable frames (18). The movable frame (18) is clamped with an upper keel (111), and the upper keel (111) is provided with a lower keel (110). The upper keel (111) and the lower keel (110) are nested and slidably connected. A dust bag (112) is provided outside the skeleton of the upper keel (111) and the lower keel (110). The support frame (113) is provided with a mounting frame (141), and the mounting frame (141) is placed between the support frame (113) and the pulse bag dust collector shell (1). The mounting frame (141) is provided with a second servo motor (151), and a screw (17) is keyed to the second servo motor (151). A drive block (19) is provided on the screw (17), and the drive block (19) is squeeze-fitted with the movable frame (18).

3. The dust recovery device for animal feed processing according to claim 2, characterized in that: A first servo motor (15) is mounted on the mounting frame (141), a driving screw rod (14) is key-connected to the first servo motor (15), a slider (16) is provided on the driving screw rod (14), and the slider (16) is key-connected to the second servo motor (151).

4. The dust recovery device for animal feed processing according to claim 2, characterized in that: The lower keel (110) is provided with a connecting frame (2), the number of the connecting frame (2) matches that of the moving frame (18), and the connecting frame (2) is contact-connected to the moving frame (18). The upper keel (111) is provided with two symmetrically distributed guide posts (201), the guide posts (201) are provided with two symmetrically distributed synchronous wheels (28), the synchronous wheels (28) are provided with a rotating gear (24), the connecting frame (2) is provided with two symmetrically distributed clamping frames (23), a synchronous belt (27) is provided between the clamping frames (23) and the synchronous wheels (28), the connecting frame (2) is provided with two symmetrically distributed connecting racks (26), the connecting racks (26) are meshed with the rotating gear (24), and the connecting frame ( 2) is provided with a guide rod (202), a connecting spring (25) is compressed between the connecting frame (2) and the upper keel (111), the connecting spring (25) is wound around the guide rod (202), the connecting frame (2) is provided with two symmetrically distributed telescopic members (21), a return spring (22) is provided between the telescopic member (21) and the connecting frame (2), the moving frame (18) is provided with two symmetrically distributed slideways, and an inclined surface is provided at the slideway opening, the connecting frame (2), the telescopic member (21) and the return spring (22) are all slidably connected in the slideway of the moving frame (18), the telescopic portion of the telescopic member (21) protrudes from the slideway opening of the moving frame (18), and the telescopic portion of the telescopic member (21) is squeezed and matched with the driving block (19).

5. The dust recovery device for animal feed processing according to claim 1, characterized in that: The pulse bag dust collector housing (1) is provided with a plurality of unlocking hooks (29), the number of the unlocking hooks (29) matches the number of the upper keel (111), and the unlocking hooks (29) are all arranged on one side of the top of the upper keel (111), and the unlocking hooks (29) cooperate with the lower keel (110).

6. The dust recovery device for animal feed processing according to claim 1, characterized in that: The pulse bag dust collector housing (1) is provided with two symmetrically distributed guide frames (31), a lifting frame (34) is provided between the two guide frames (31), a top column (3) is provided on the lifting frame (34), a counterweight (32) is provided on the guide frame (31), the counterweight (32) and the lifting frame (34) are connected by a pull rope (33), and the pull rope (33) is connected to the guide frame (31) in a through-type manner.

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