An initial screening device and method for activated alumina micropowder particles

Abstract

The present invention provides a preliminary screening device and method for activated alumina micropowder particles, which relates to the field of screening feeding equipment and includes a control flap rotatably connected to the bottom of the inner cavity of a material storage hopper. It solves the problem that the feeding port of the existing screening equipment is an open design without any blocking structure, so that the dust stirred up during the screening of alumina powder raw materials is easily scattered from the feeding port, polluting the working environment and damaging the health of workers. The feeding assembly can be used to feed materials into the screening equipment. The dust-proof control assembly has the function of blocking feeding, that is, when feeding through the material storage hopper, it follows the steps of first blocking and pushing in and then feeding, and at the same time, when pulling out the material storage hopper, it follows the steps of first blocking and then pulling out, which is convenient to effectively block the feeding port of the screening equipment during the feeding process all the time, avoiding the dust stirred up inside the screening equipment from scattering out of the screening equipment, and is flexible to use.

Description

Technical Field

[0001] The present invention relates to the technical field of screening feeding equipment, and particularly relates to a primary screening equipment and method for activated alumina micropowder particles. Background Art

[0002] Aluminum oxide powder is a common industrial material, which is a commonly used adsorbent, catalyst and catalyst carrier in petroleum refining and petrochemical industry. During the processing of aluminum oxide powder, screening equipment is needed for screening. Pouring the raw materials into the feeding port of the screening equipment can realize the screening operation of the raw materials.

[0003] However, for the existing screening equipment at present, in order to facilitate the feeding operation during screening, its feeding port is designed as an open port without any blocking structure. Therefore, when screening the raw materials of aluminum oxide powder, the dust stirred up is very easy to scatter out from the feeding port, polluting the working environment and damaging the health of workers. Its flexibility and stability are poor, and its practicability is not high. Summary of the Invention

[0004] In view of this, the present invention provides a primary screening equipment and method for activated alumina micropowder particles, which has a feeding component and a dust-proof control component. The feeding component can be used to feed materials into the interior of the screening equipment, and at the same time, the feeding operation can be realized even when the screening equipment is working, without interrupting or interfering with the working state of the screening equipment. It is flexible and convenient to use. The dust-proof control component has the function of plugging feeding, that is, when feeding through the material storage hopper, it follows the steps of first plugging and pushing in and then feeding, and at the same time, when pulling out the material storage hopper, it follows the steps of first plugging and then pulling out. It is convenient to effectively plug the feeding port of the screening equipment during the feeding process, avoiding the dust stirred up inside the screening equipment from scattering out of the interior of the screening equipment. It is flexible to use and can adapt to the screening operation of activated alumina micropowder particles under different conditions. Its flexibility, adaptability and practicability are extremely strong.

[0005] The present invention provides a primary screening equipment and method for activated alumina micropowder particles, which specifically includes: a feeding component, the feeding component includes a dust-proof outer shell, a material storage hopper, a control flap and a pull-and-lock rod. The dust-proof outer shell is fixedly installed on the top of the feeding port of the screening equipment, and a feeding channel is provided at the bottom of the dust-proof outer shell. The material storage hopper is inserted into the interior of the dust-proof outer shell, and the control flap is rotatably connected to the bottom of the inner cavity of the material storage hopper. The pull-and-lock rod is inserted into the side of the dust-proof outer shell. A dust-proof control component, the dust-proof control component includes a driving rod, a follower rod and an inner push lock block. The driving rod is inserted into the interior of the material storage hopper, and the follower rod is inserted into the interior of the material storage hopper. The inner push lock block is inserted into the interior of the material storage hopper, and the driving rod and the follower rod are respectively located on both sides of the inner push lock block.

[0006] Furthermore, a draw locking hole is provided on the bottom side of the material hopper, and when the material hopper is completely inserted into the dust-proof housing, one end of the rod body of the draw locking rod is inserted into the draw locking hole.

[0007] Furthermore, a locking draw spring is provided on the outer side of the rod body of the draw locking rod, and both ends of the locking draw spring are fixedly connected to the side of the draw locking rod and the side of the dust-proof housing respectively.

[0008] Furthermore, a control gear is provided on the outer side of the rotating shaft of the control flap, and a control rack is provided on the top of the follower rod, and the teeth of the control gear and the control rack are engaged for transmission.

[0009] Furthermore, a track block with a "T"-shaped cross section is provided on the side of the inner push locking block, and a track groove is provided at one end of the rod body of the follower rod, and the track block is inserted into the track groove.

[0010] Furthermore, an "L"-shaped limit groove is provided inside the material hopper, and the block body of the inner push locking block is inserted into the limit groove.

[0011] Furthermore, an inner push locking rod is provided on the top of the inner push locking block, and an inner push locking hole is provided inside the material hopper. When the material hopper is pulled out of the dust-proof housing, the inner push locking rod is inserted into the inner push locking hole.

[0012] Furthermore, an inclined unlocking groove is provided inside the block body of the inner push locking block, and an unlocking rod is provided on the outer side of the rod body of the driving rod. When the material hopper is pulled out of the dust-proof housing, the unlocking rod is inserted into the bottom end of the unlocking groove.

[0013] Furthermore, a locking top spring is provided on the side of the driving rod, and both ends of the locking top spring are respectively abutted against the inside of the material hopper and the inside of the driving rod. Beneficial effects

[0014] 1. When the device is in use, the feeding assembly can be used to feed materials into the screening device. At the same time, even when the screening device is working, feeding operations can be carried out without interrupting or interfering with the working state of the screening device. It is flexible and convenient to use. Moreover, the dust-proof control assembly has the function of plugging feeding, that is, when feeding through the material hopper, it follows the steps of first plugging and pushing in and then feeding. At the same time, when pulling out the material hopper, it follows the steps of first plugging and then pulling out. This makes it convenient to effectively plug the feeding port of the screening device during the feeding process, avoiding the dust stirred up inside the screening device from scattering out of the screening device. It is flexible and can adapt to the screening operations of alumina fine powder particles under different conditions, improving the flexibility, adaptability and practicability of the device.

[0015] 2. The device abandons the traditional open feeding method and adopts drawer feeding, so that the dust stirred up inside the screening equipment when feeding and screening equipment are working will not be dispersed, ensuring the cleanliness of the working environment and protecting the health of workers. When preparing materials, the hopper is pulled out of the dustproof shell. At this time, the flap is controlled to be in a parallel state to seal the bottom of the hopper, so that the inside of the hopper can store the screening raw materials of alumina powder. After the preparation is completed, the hopper is pushed into the dustproof shell, and the flap is controlled to automatically flip downward so that the raw materials in the hopper fall into the feed port of the screening equipment through the feeding channel, and finally the operation of screening and processing the raw materials of alumina powder through the screening equipment is realized. It is convenient and flexible to use, there is no dust overflow, and the stability is extremely strong.

[0016] 3. When the hopper of the device is in a pulled-out state, the control flap is in a parallel state to block the bottom of the hopper, and when feeding through the hopper, the hopper can follow the steps of first blocking and pushing and then feeding, that is, when the hopper is not fully pushed into the dustproof housing, the control flap will not flip over to feed, thereby ensuring that dust inside the screening equipment will not be dispersed through the dustproof housing during feeding. When the hopper is in a pulled-out state, the inner push locking rod is located inside the inner push locking hole, thereby locking the use state of the control flap, so that the control flap will not accidentally flip over and cause leakage when it is not fully pushed into the dustproof housing.

[0017] 4. When the hopper is pushed inward to realize the feeding operation, the rod body of the driving rod is longer than the length of the hopper, and the rod body of the driving rod exceeds the edge of the hopper, so that the driving rod can be first blocked by the inner wall of the dustproof shell when the hopper is pushed in, and then the driving rod cannot move. When the hopper is pushed in further, since the driving rod cannot move, the inner push locking block can move downward through the unlocking rod when the inner push locking block moves with the hopper, so that the inner push locking rod is disengaged from the inner push locking hole to release the following drive. The locking state of the rod, after which the hopper continues to be pushed in, the driving rod, the follower rod and the inner push locking block can no longer move with the hopper, so that when the hopper continues to move, the control rack can drive the control flap to flip downward through the control gear to realize the feeding operation. The use is convenient and quick. At the same time, when the hopper is fully inserted into the interior of the dustproof shell, the pull-out locking rod can be inserted into the pull-out locking hole under the action of the locking tension spring, thereby locking the hopper so that it will not accidentally fall out of the dustproof shell, and the use is stable.

[0018] 5. When it is necessary to pull out the hopper for re-feeding preparation, the hopper can be pulled out after unlocking the locking state of the hopper by pulling the pull-lock lever. Moreover, when the hopper is pulled out, it follows the steps of first blocking and then pulling out. That is, when the pull-lock lever is pulled to unlock the locking state of the hopper, under the action of the locking top spring, the dust-proof control component can automatically reset to restore the state of controlling the flap to block the hopper. After that, the hopper can be pulled out for re-feeding use, effectively avoiding the phenomenon and problem of the internal dust of the screening equipment flying out through the hopper when the hopper is pulled out, and further improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0021] In the drawings:

[0022] Figure 1 is the overall structural schematic diagram of the present invention.

[0023] Figure 2 is the internal structural schematic diagram of the hopper of the present invention after disassembly.

[0024] Figure 3 is the structural schematic diagram of the dust-proof control component of the present invention after disassembly.

[0025] Figure 4 is the internal structural schematic diagram of the present invention when the hopper is pulled out of the feeding housing.

[0026] Figure 5 is the internal structural schematic diagram of the present invention when the hopper is pushed inward.

[0027] Figure 6 is the internal structural schematic diagram of the present invention after the hopper completely enters the dust-proof housing and the feeding operation is realized.

[0028] Figure 7 is the present invention Figure 4 The enlarged structural schematic diagram of part A in.

[0029] Figure 8 is the present invention Figure 5 The enlarged structural schematic diagram of part B in.

[0030] Figure 9 is the present invention Figure 6 The enlarged structural schematic diagram of part C in.

[0031] LIST OF REFERENCE NUMERALS

[0032] 1. Feeding component; 101. Dust-proof housing; 102. Material hopper; 1021. Pull-out locking hole; 1022. Inner push locking hole; 1023. Limit groove; 103. Control flap; 1031. Control gear; 104. Pull-out locking rod; 1041. Locking tension spring; 2. Dust-proof control component; 201. Driving rod; 2011. Unlocking rod; 2012. Locking top spring; 202. Follow-up rod; 2021. Control rack; 2022. Track groove; 203. Inner push locking block; 2031. Track block; 2032. Inner push locking rod; 2033. Unlocking groove. Detailed implementation manner

[0033] In the following, the technical solutions of the embodiments of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention.

[0034] Embodiment: Please refer to Figures 1 to 9 as shown:

[0035] The present invention provides a preliminary screening device and method for activated alumina micropowder particles, including a feeding component 1. The feeding component 1 includes a dust-proof housing 101, a material hopper 102, a control flap 103 and a pull-out locking rod 104. The dust-proof housing 101 is fixedly installed at the top of the feeding port of the screening device, and a feeding channel is provided at the bottom of the dust-proof housing 101; the material hopper 102 is inserted into the inside of the dust-proof housing 101, and the control flap 103 is rotatably connected to the bottom of the inner cavity of the material hopper 102, and the pull-out locking rod 104 is inserted into the side of the dust-proof housing 101; a dust-proof control component 2, the dust-proof control component 2 includes a driving rod 201, a follow-up rod 202 and an inner push locking block 203. The driving rod 201 is inserted into the inside of the material hopper 102, the follow-up rod 202 is inserted into the inside of the material hopper 102, the inner push locking block 203 is inserted into the inside of the material hopper 102, and the driving rod 201 and the follow-up rod 202 are respectively located on both sides of the inner push locking block 203.

[0036] The screening device is electrically connected to an external power source and a control device. Its specific structure and working principle are mature existing technologies and will not be elaborated here.

[0037] Among them, an inner push locking rod 2032 is provided at the top of the inner push locking block 203, and an inner push locking hole 1022 is provided inside the material hopper 102. When the material hopper 102 is pulled out of the dust-proof housing 101, the inner push locking rod 2032 is inserted into the inner push locking hole 1022. During use, this device abandons the traditional open feeding method and adopts a drawer-type feeding method, so that the dust raised inside the screening equipment during feeding and the operation of the screening equipment will not escape, ensuring the cleanliness of the working environment and protecting the physical health of workers. When preparing materials, the material hopper 102 is pulled out of the dust-proof housing 101. At this time, the control flap 103 is in a parallel state to block the bottom of the material hopper 102, so that the inside of the material hopper 102 can store the screening raw materials of alumina powder. After the preparation of materials is completed, after the material hopper 102 is pushed into the dust-proof housing 101, the control flap 103 can automatically turn downward so that the raw materials inside the material hopper 102 fall into the feeding port of the screening equipment through the feeding channel, and finally the operation of screening and processing the raw materials of alumina powder by the screening equipment is realized. Moreover, when the material hopper 102 is in the pulled-out state, the control flap 103 is in a parallel state to block the bottom of the material hopper 102, and when feeding through the material hopper 102, the material hopper 102 can follow the steps of first blocking and then pushing in for feeding, that is, when the material hopper 102 is not completely pushed into the dust-proof housing 101, the control flap 103 will not turn over for feeding, ensuring that the dust inside the screening equipment will not escape through the dust-proof housing 101 during feeding. When the material hopper 102 is in the pulled-out state, at this time, the inner push locking rod 2032 is located inside the inner push locking hole 1022, thus realizing the locking of the use state of the control flap 103, so that the control flap 103 will not accidentally turn over and cause material leakage when it is not completely pushed into the dust-proof housing 101.

[0038] Among them, an inclined unlocking groove 2033 is provided inside the body of the inner push locking block 203, and an unlocking rod 2011 is provided outside the rod body of the driving rod 201. When the material hopper 102 is pulled out of the dust-proof housing 101, the unlocking rod 2011 is inserted into the bottom end of the unlocking groove 2033. During use, when the material hopper 102 is pushed inward to perform the feeding operation, the length of the rod body of the driving rod 201 is greater than the length of the material hopper 102, and the rod body of the driving rod 201 extends beyond the edge of the material hopper 102. Therefore, when the material hopper 102 is pushed in, the driving rod 201 can be first blocked by the inner wall of the dust-proof housing 101. After that, the driving rod 201 cannot move. When the material hopper 102 is continuously pushed in, since the driving rod 201 cannot move, the unlocking groove 2033 of the inner push locking block 203 can cause the inner push locking block 203 to move downward through the unlocking rod 2011 when the inner push locking block 203 moves along with the material hopper 102, so that the inner push locking rod 2032 disengages from the inside of the inner push locking hole 1022 to release the locking state of the follower rod 202. After that, the material hopper 102 is continuously pushed in, and at this time, the driving rod 201, the follower rod 202, and the inner push locking block 203 cannot move along with the material hopper 102. A control gear 1031 is provided outside the rotating shaft of the control flap 103, and a control rack 2021 is provided at the top of the follower rod 202. The teeth of the control gear 1031 and the control rack 2021 are engaged and driven. Therefore, when the material hopper 102 continues to move, the control rack 2021 can drive the control flap 103 to turn downward through the control gear 1031 to perform the feeding operation, which is convenient and fast. At the same time, when the material hopper 102 is completely inserted into the dust-proof housing 101, a locking spring 1041 is provided outside the rod body of the pull-out locking rod 104, and the two ends of the locking spring 1041 are respectively fixedly connected to the side surface of the pull-out locking rod 104 and the side surface of the dust-proof housing 101. A pull-out locking hole 1021 is provided on the bottom side surface of the material hopper 102. When the material hopper 102 is completely inserted into the dust-proof housing 101, one end of the rod body of the pull-out locking rod 104 is inserted into the inside of the pull-out locking hole 1021. The pull-out locking rod 104 can be inserted into the inside of the pull-out locking hole 1021 under the action of the locking spring 1041, so as to lock the material hopper 102 to prevent it from accidentally falling out of the dust-proof housing 101, and the use is stable.

[0039] Among them, a locking top spring 2012 is provided on the side of the driving rod 201, and both ends of the locking top spring 2012 are respectively abutted against the inside of the material hopper 102 and the inside of the driving rod 201. During use, when it is necessary to pull out the material hopper 102 for re-feeding, after unlocking the locking state of the material hopper 102 by pulling the pull-out locking rod 104, the material hopper 102 can be pulled out. Moreover, when the material hopper 102 is pulled out, it follows the steps of first sealing and then pulling out. That is, when the pull-out locking rod 104 is pulled to release the locking state of the material hopper 102, under the action of the locking top spring 2012, the dust-proof control assembly 2 can automatically reset to restore the sealing state of the control flap 103 for the material hopper 102. After that, the material hopper 102 can be pulled out for re-feeding use, effectively avoiding the phenomenon and problem that the internal dust of the screening equipment is scattered through the material hopper 102 when the material hopper 102 is pulled out, and further improving the stability of the device.

[0040] Among them, a track block 2031 with a "T"-shaped cross-section is provided on the side of the inner push locking block 203, and a track groove 2022 is provided at one end of the rod body of the follower rod 202. The track block 2031 is inserted into the inside of the track groove 2022. During use, when the inner push locking block 203 moves horizontally, the track block 2031 can drive the follower rod 202 to move synchronously through the track groove 2022, thus achieving the purpose of controlling the use state of the control flap 103.

[0041] Among them, an "L"-shaped limit groove 1023 is provided inside the material hopper 102, and the block body of the inner push locking block 203 is inserted into the inside of the limit groove 1023. During use, the limit groove 1023 can limit the movement track of the inner push locking block 203, so that the inner push locking block 203 can stably complete the corresponding longitudinal or horizontal movement, and the phenomenon of jamming and failure of the device caused by skew or distortion will not occur, and the use is stable.

[0042] The device realizes the action control of the control flap 103 through the transmission mode of the gear and rack, and the material hopper 102 and the control flap 103 can be respectively locked in the use state by the pull-out locking rod 104 and the push-in locking rod 2032. Through the design of the pull-out locking rod 104, it is ensured that the control flap 103 of the material hopper 102 will not accidentally flip due to its own weight or the impact of raw materials during feeding, and the use is stable. The conventional gear and rack transmission structure does not have a self-locking function. Without the design of the pull-out locking rod 104, the above technical effect cannot be achieved. Moreover, if a conventional cylinder or telescopic rod is used to drive the use action of the control flap 103, a single cylinder or telescopic rod cannot realize the functions that the control flap 103 follows the sequence of first plugging and pushing in, then flipping and opening for feeding, and first plugging and then pulling out when the material hopper 102 is withdrawn. It needs to cooperate with other electronic control components, resulting in a complex structure and troublesome use. However, when the device is used in coordination with the actions during feeding and stock preparation, it completely relies on the extrusion trigger of the mechanical structure to make the control flap 103 follow the sequence of first plugging and pushing in, then flipping and opening for feeding, and first plugging and then pulling out when the material hopper 102 is withdrawn. It does not require any external control components, is convenient to use, and has a simple design.

[0043] Specific usage and function of this embodiment: In the present invention, when it is necessary to perform screening and processing operations on alumina powder particles, the feeding operation into the interior of the screening device can be realized through the feeding component 1, and the drawer-type feeding is adopted, so that the dust stirred up inside the screening device when the feeding and screening equipment are working will not be dispersed, thereby ensuring the cleanliness of the working environment and protecting the health of the workers. When preparing materials, the hopper 102 is pulled out of the interior of the dustproof shell 101. At this time, the control flap 103 is in a parallel state to block the bottom of the hopper 102, so that the interior of the hopper 102 can store the screening raw materials of the alumina powder. After the preparation is completed, the hopper 102 is pushed into the interior of the dustproof shell 101, and the control flap 103 can automatically flip downward to The raw materials in the hopper 102 are dropped into the feed port of the screening device through the feed channel, and finally the screening and processing operation of the raw materials of the alumina powder is realized through the screening device. When the hopper 102 is in the withdrawn state, the flap 103 is controlled to be in a parallel state to block the bottom of the hopper 102, and when feeding through the hopper 102, the hopper 102 can follow the steps of first blocking, pushing and then feeding, that is, when the hopper 102 is not completely pushed into the dustproof housing 101, the flap 103 is controlled not to flip over to feed, so as to ensure that the dust inside the screening device will not be dispersed through the dustproof housing 101 during feeding. When the hopper 102 is in the withdrawn state, the inner push locking rod 2032 is located inside the inner push locking hole 1022, thereby realizing The control flap 103 is locked in the use state, so that the control flap 103 will not accidentally flip over and cause material leakage when it is not fully pushed into the dustproof shell 101. When the hopper 102 is pushed inward to realize the feeding operation, the rod body length of the driving rod 201 is greater than the length of the hopper 102, and the rod body of the driving rod 201 exceeds the edge of the hopper 102. Therefore, the driving rod 201 can first be blocked by the inner wall of the dustproof shell 101 when the hopper 102 is pushed in, and the driving rod 201 cannot move thereafter. When the hopper 102 continues to be pushed in, since the driving rod 201 cannot move, the inner push locking block 203 can unlock the groove 2033 through the unlocking rod 2011 when following the movement of the hopper 102, so that the inner push locking block 203 can be pushed forward. At the same time, when the hopper 102 is fully inserted into the dustproof housing 101, the pull-out locking rod 104 can be inserted into the pull-out locking hole 1021 under the action of the locking tension spring 1041, thereby locking the hopper 102 so that it will not accidentally fall out of the dustproof housing 101.When it is necessary to pull out the material hopper 102 for re-feeding, the locking state of the material hopper 102 can be released by pulling the pull-and-lock lever 104, and then the material hopper 102 can be pulled out. Moreover, when the material hopper 102 is pulled out, it follows the steps of first blocking and then pulling out. That is, when the pull-and-lock lever 104 is pulled to release the locking state of the material hopper 102, under the action of the locking top spring 2012, the dust-proof control component 2 can automatically reset to restore the blocking state of the control flap 103 on the material hopper 102. After that, the material hopper 102 can be pulled out for re-feeding, effectively avoiding the phenomenon and problem that the dust inside the screening equipment diffuses out through the material hopper 102 when the material hopper 102 is pulled out.

Claims

1. A preliminary screening device for activated alumina micropowder particles, characterized in that, Comprising: A feeding component (1), the feeding component (1) includes a dust-proof housing (101), a material hopper (102), a control flap (103) and a pull-out locking rod (104). The dust-proof housing (101) is fixedly installed at the top of the feeding port of the screening device, and a feeding channel is provided at the bottom of the dust-proof housing (101); the material hopper (102) is inserted into the inside of the dust-proof housing (101), and the control flap (103) is rotatably connected to the bottom of the inner cavity of the material hopper (102), and the pull-out locking rod (104) is inserted into the side of the dust-proof housing (101); A dust-proof control component (2), the dust-proof control component (2) includes a driving rod (201), a follower rod (202) and an inner push locking block (203). The driving rod (201) is inserted into the inside of the material hopper (102), and the follower rod (202) is inserted into the inside of the material hopper (102). The inner push locking block (203) is inserted into the inside of the material hopper (102), and the driving rod (201) and the follower rod (202) are respectively located on both sides of the inner push locking block (203); A control gear (1031) is provided outside the rotating shaft of the control flap (103), and a control rack (2021) is provided at the top of the follower rod (202). The teeth of the control gear (1031) and the control rack (2021) are engaged and driven.

2. The preliminary screening device for activated alumina micropowder particles according to claim 1, characterized in that: A pull-out locking hole (1021) is provided on the side of the bottom of the material hopper (102), and when the material hopper (102) is completely inserted into the inside of the dust-proof housing (101), one end of the rod body of the pull-out locking rod (104) is inserted into the inside of the pull-out locking hole (1021).

3. The preliminary screening device for activated alumina micropowder particles according to claim 1, characterized in that: A locking pull spring (1041) is provided outside the rod body of the pull-out locking rod (104), and both ends of the locking pull spring (1041) are respectively fixedly connected to the side of the pull-out locking rod (104) and the side of the dust-proof housing (101).

4. The preliminary screening device for activated alumina micropowder particles as described in claim 1, characterized in that: A rail block (2031) with a "T" cross-section is provided on the side of the inner push locking block (203), and a rail groove (2022) is provided at one end of the rod body of the follower rod (202). The rail block (2031) is inserted into the inside of the rail groove (2022).

5. The preliminary screening equipment for activated alumina micropowder particles according to claim 1, characterized in that: An "L"-shaped limiting groove (1023) is provided inside the material hopper (102), and the block body of the inner push locking block (203) is inserted into the inside of the limiting groove (1023).

6. The preliminary screening equipment for activated alumina micropowder particles as described in claim 1, wherein: An inner push locking rod (2032) is provided at the top of the inner push locking block (203), and an inner push locking hole (1022) is provided inside the material hopper (102). When the material hopper (102) is pulled out of the inside of the dust-proof housing (101), the inner push locking rod (2032) is inserted into the inside of the inner push locking hole (1022).

7. The preliminary screening equipment for activated alumina micropowder particles as described in claim 1, characterized in that: An inclined unlocking groove (2033) is provided inside the block body of the inner push locking block (203), and an unlocking rod (2011) is provided outside the rod body of the driving rod (201). When the material hopper (102) is pulled out of the inside of the dust-proof housing (101), the unlocking rod (2011) is inserted into the bottom end of the unlocking groove (2033).

8. The preliminary screening device for activated alumina micropowder particles according to claim 1, characterized in that: A locking top spring (2012) is provided on the side of the driving rod (201), and two ends of the locking top spring (2012) respectively abut against the inside of the material hopper (102) and the inside of the driving rod (201).

9. The usage method of a primary screening device for activated alumina micropowder particles as described in claim 1, wherein the feeding operation into the interior of the screening device can be achieved through the feeding assembly (1); the drawer-type feeding is adopted, so that the dust raised inside the screening device during feeding and the operation of the screening device will not escape, ensuring the cleanliness of the working environment and protecting the physical health of workers; it is characterized in that: The following steps are involved: S1. When preparing materials, the material hopper (102) is pulled out of the dustproof housing (101), and the flap (103) is controlled to be in a parallel state to seal the bottom of the material hopper (102), so that the inside of the material hopper (102) can store the screened raw material of the alumina powder; When the material hopper (102) is in the withdrawn state, the control flap (103) is in a parallel state to block the bottom of the material hopper (102), and when feeding through the material hopper (102), the material hopper (102) can follow the steps of first blocking and pushing in and then feeding, that is, when the material hopper (102) is not completely pushed into the interior of the dustproof housing (101), the control flap (103) will not flip over to feed, thereby ensuring that dust inside the screening device will not be dispersed through the dustproof housing (101) when feeding; When the material hopper (102) is in the withdrawn state, the inner push locking rod (2032) is located inside the inner push locking hole (1022), thereby locking the control flap (103) in the use state, so that the control flap (103) will not accidentally flip over and cause material leakage when it is not completely pushed into the dustproof housing (101). S2. After the material preparation is completed, the material hopper (102) is pushed into the dustproof housing (101), and the flap (103) is controlled to automatically flip downward so that the raw materials in the material hopper (102) fall into the feed port of the screening device through the feed channel, and finally the raw materials of the alumina powder are screened and processed by the screening device; When the material hopper (102) is pushed inward to realize the feeding operation, the rod body length of the driving rod (201) is greater than the length of the material hopper (102), and the rod body of the driving rod (201) exceeds the edge of the material hopper (102), so that the driving rod (201) can first be blocked by the inner wall of the dustproof housing (101) when the material hopper (102) is pushed in, and then the driving rod (201) cannot move. When the material hopper (102) is further pushed in, since the driving rod (201) cannot move, the unlocking groove (2033) of the inward push locking block (203) can be unlocked when following the movement of the material hopper (102). The unlocking rod (211) can be used to move the inner push locking block (203) downward, so that the inner push locking rod (2032) escapes from the inner push locking hole (1022) to release the locking state of the follower rod (202), and then the material hopper (102) continues to be pushed in. At this time, the driving rod (201), the follower rod (202) and the inner push locking block (203) are unable to move with the material hopper (102), so that when the material hopper (102) continues to move, the control rack (2021) can drive the control flap (103) to flip downward through the control gear (1031) to realize the feeding operation; When the material hopper (102) is completely inserted into the dustproof housing (101), the draw-out locking rod (104) can be inserted into the draw-out locking hole (1021) under the action of the locking tension spring (1041), thereby locking the material hopper (102) so that it will not accidentally fall out of the dustproof housing (101); S3. When the material hopper (102) needs to be pulled out for re-preparation of materials, the material hopper (102) can be pulled out after the locking state of the material hopper (102) is released by pulling the pull-out locking rod (104), and the material hopper (102) follows the steps of first blocking and then pulling out when being pulled out, that is, when the locking state of the material hopper (102) is released by pulling the pull-out locking rod (104), under the action of the locking top spring (2012), the dust control component (2) can automatically reset and restore the control flap (103) to the blocking state of the material hopper (102), and then the material hopper (102) can be pulled out to prepare materials for use again.

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