Raw material conveying assembly for aluminum oxide production

Abstract

The invention relates to the technical field of transportation equipment, in particular to an aluminum oxide production raw material conveying assembly which comprises a main conveying belt and an auxiliary conveying belt which are obliquely installed in an attached mode through a supporting assembly. The main conveying belt is located at the bottom and used for conveying crushed bauxite to the screening machine, and the auxiliary conveying belt is located at the top and used for receiving and returning over-specification materials separated by the screening machine and serves as a dustproof mechanism to cover the main conveying belt. Side eaves plates are arranged on the main conveying belt and the auxiliary conveying belt, and main push plates and auxiliary push plates are arranged on the side eaves plates of the main conveying belt and the auxiliary conveying belt at intervals; the auxiliary push plate is of a hollow structure, guide grooves are formed in the two sides of the auxiliary push plate, a pop-up sealing plate is installed in the guide grooves through a support, and the bottom of the support is connected with a pop-up piece. A magnetic base is arranged at the bottom of the auxiliary conveying belt, and when the auxiliary pushing plate rotates to the position attached to the main pushing plate along with the auxiliary conveying belt, the magnetic base triggers the closing plate to pop out and be in sealed connection with the two sides of the main pushing plate; the purpose of dynamically sealing to reduce flying dust during bauxite conveying is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation equipment, and particularly to a raw material conveying assembly for alumina production. Background Art

[0002] During the alumina production process, the conveying assembly is a key equipment for the raw materials and their intermediates to flow through each processing step. The traditional conveying system mainly has the following problems in the screening section after the bauxite is crushed: The open conveying design causes the fine powder of bauxite to scatter. At the same time, the surface and edges of the conveyor belt are easily adhered to by the raw materials, which not only causes waste of raw materials but also forms a secondary pollution source. In addition, the return conveying process of the unqualified screened materials mostly uses independent conveying equipment, with a complex system and high energy consumption.

[0003] Currently, in the Bayer process, bauxite needs to go through the pretreatment processes of crushing, screening, and grinding. The current conveying equipment is difficult to simultaneously meet the requirements of sealed conveying, automatic feeding back, and self-cleaning. Although some conveying equipment attempts to adopt a closed conveying method, the closed structure is fixed on the conveying equipment and cannot move synchronously with the conveyor belt. In order to meet the closed requirements, it needs to be closely attached to structures such as the conveyor belt, resulting in wear of the conveyor belt. If it cannot be closely attached, dust will easily be generated from both ends of the feeding and discharging. Summary of the Invention

[0004] The purpose of the present invention is to provide a raw material conveying assembly for alumina production, so as to achieve dynamic sealing to reduce the dust generated during the bauxite conveying, and to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A raw material conveying assembly for alumina production, including a main conveyor belt and a secondary conveyor belt, which are installed in a fitting and inclined manner through a support assembly;

[0006] The main conveyor belt is located at the bottom for conveying the crushed bauxite to the screening machine, and the secondary conveyor belt is located at the top for receiving and returning the oversized materials separated by the screening machine, and at the same time serves as a dust-proof mechanism to cover the main conveyor belt;

[0007] Both the main and secondary conveyor belts are provided with side eaves plates, and main pushing plates and secondary pushing plates are respectively arranged at intervals on the side eaves plates of the two; The secondary pushing plate is of a hollow structure, with guiding grooves on both sides thereof, and a pop-up closing plate is installed in the guiding grooves through a bracket, and a pop-up member is connected to the bottom of the bracket;

[0008] A magnetic seat is provided at the bottom of the secondary conveyor belt. When the secondary pushing plate rotates with the secondary conveyor belt to the position where it fits with the main pushing plate, the magnetic seat triggers the closing plate to pop up and be hermetically connected to both sides of the main pushing plate;

[0009] An auxiliary cleaning assembly driven by the main conveyor belt itself is provided at the top of the main conveyor belt, including a rotating brush driven by a transmission mechanism and a lifting and knocking mechanism. When the auxiliary push plate rotates with the auxiliary conveyor belt to the position of the lifting and knocking mechanism, the closing plate is pushed to retract by the lifting and knocking mechanism.

[0010] Preferably, the main push plates and the auxiliary push plates are arranged in one-to-one correspondence, and can fit together to form a dynamic continuous sealing surface when the conveyor belt is running.

[0011] Preferably, the closing plate is slidably connected to the positioning seat on the outer wall of the side eaves plate through the limiting members at both ends of the bracket, and a spring pin with a magnetic member is provided on the positioning seat, and corresponding jacks are provided on the limiting members;

[0012] The magnetic seat can generate a magnetic attraction force on the magnetic member to pull out the spring pin from the jack.

[0013] Preferably, the auxiliary cleaning assembly includes an extension plate fixed to the top of the main conveyor belt. A driven pulley is installed on the extension plate through a rotating shaft, and an extension shaft on the main conveyor belt drive shaft is connected with a driving pulley, and the two are linked by a belt to drive the rotating shaft to rotate.

[0014] Preferably, brushes extending into the screening machine are annularly arranged on the rotating shaft for cleaning the residual materials on the surface of the main conveyor belt.

[0015] Preferably, a runner is installed on the extension shaft, and top balls and push rods higher than the top balls are annularly arranged on the surface of the runner.

[0016] Preferably, a lifting frame is installed on the main conveyor belt through spring guide rods, and the bottom plate of the lifting frame cooperates with the top balls and push rods on the runner to realize an intermittent lifting movement.

[0017] Preferably, a top plate is vertically installed on the lifting frame, and a knocking member is provided in the middle of the top plate, which impacts the side eaves plate to generate vibration when moving with the lifting frame.

[0018] Preferably, a locking rod is installed on the top plate. When the push rod jacks up the lifting frame, the locking rod synchronously pushes the limiting member to reset to retract the closing plate;

[0019] The distance between the main push plates is matched with the rotation period of the runner to ensure that the displacement of one main push plate corresponds to one rotation of the runner.

[0020] Preferably, a through groove covered by the auxiliary push plate is provided at the connection between the auxiliary push plate and the side eaves plate for the bracket to pass through while preventing dust leakage.

[0021] Preferably, the closing plate can completely cover the guiding groove in both the popped-up and retracted states to prevent dust from entering the cavity of the auxiliary push plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention has an efficient dust-proof sealing system. The conveying assembly is designed with a double-layer structure of a main conveyor belt and a secondary conveyor belt. The secondary conveyor belt also serves as a dust-proof cover. At the same time, there are a main pushing plate and a secondary pushing plate, which cooperate with the closing plate structure to achieve dynamic sealing. A magnetic trigger type closing mechanism is adopted, and the closing plate automatically adjusts the sealing state along with the operation of the conveyor belt, ensuring sealing while avoiding wear of the conveying structure.

[0024] 2. The conveyor belt of the present invention has a self-cleaning function. It uses the power of the conveyor belt itself to drive the brush cleaning device, which can effectively reduce material residue in cooperation with the vibration knocking mechanism, so as to prevent the conveyor belt from carrying out the residual bauxite to form dust. At the same time, on the auxiliary cleaning assembly, the state of the closing plate is precisely controlled through the linkage system of the rotating wheel and the lifting frame, and the combination of the push rod and the top ball realizes multi-stage action control, so that during the gap when the vibration knocking structure works, the retraction control of the closing plate can be achieved.

[0025] 3. The present invention enhances the conveying stability through the combination of the side eaves plate and the pushing plate, reduces raw material waste and dust emission, reduces the energy consumption of cleaning and maintenance, reduces dust to extend the service life of the equipment, protects the transmission components, and while providing a closing effect through the secondary conveyor belt, it can return the bauxite that does not meet the requirements, increasing the integration ability of the conveying assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the first schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is the second schematic diagram of the overall structure of the present invention.

[0028] Figure 3 It is the schematic diagram of the main conveyor belt of the present invention.

[0029] Figure 4 It is the schematic diagram of the structure of the secondary conveyor belt of the present invention.

[0030] Figure 5 It is the schematic diagram of the structure of the closing plate of the present invention.

[0031] Figure 6 It is the schematic diagram of the installation structure of the closing plate of the present invention.

[0032] Figure 7 It is the partial schematic diagram of the structure of the closing plate and the bracket of the present invention.

[0033] Figure 8 It is the partial schematic diagram of the structure of the main conveyor belt of the present invention.

[0034] Figure 9 It is the schematic diagram of the brush structure of the present invention.

[0035] Figure 10 It is the schematic diagram of the structure of the lifting frame of the present invention.

[0036] In the figure: 1, main conveyor belt; 2, auxiliary conveyor belt; 3, side eaves plate; 4, main pusher plate; 5, auxiliary pusher plate; 6, guide groove; 7, bracket; 8, closing plate; 9, ejecting member; 10, limiting member; 11, end; 12, positioning seat; 13, spring pin; 14, magnetic member; 15, magnetic seat; 16, extension plate; 17, extension shaft; 18, rotating shaft; 19, driving pulley; 20, driven pulley; 21, brush; 22, runner; 23, top ball; 24, push rod; 25, spring guide rod; 26, lifting frame; 27, bottom plate; 28, top plate; 29, knocking member; 30, locking rod. Specific embodiments

[0037] Next, in combination with the drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of non-conflict, any combination can be formed among the following-described embodiments or technical features to form new embodiments. It should be known that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0038] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a raw material conveying component for alumina production, which is used in an intelligent heat treatment production line for alumina processing. This conveying component is mainly used in the bauxite screening process to transport the crushed bauxite into a screening machine to obtain bauxite that meets the size requirements.

[0039] This conveying component is composed of a combination of a main conveyor belt 1 and an auxiliary conveyor belt 2, and the two are installed in a fitting manner through a support component. Moreover, the overall of the main conveyor belt 1 and the auxiliary conveyor belt 2 are both inclined. Among them, the main conveyor belt 1 is at the bottom and can send the crushed bauxite into the screening machine from below. The screening machine separates the bauxite through a sieve mesh. The bauxite that meets the size requirements is collected from the bottom of the screening machine, while the bauxite that exceeds the size requirements is sent above the auxiliary conveyor belt 2 through the vibration component in the screening machine and transported to the lower part for recycling through the auxiliary conveyor belt 2. And in this process, the transportation section of the main conveyor is covered by the auxiliary conveyor belt 2 at the top to reduce the dust generated during the transportation of bauxite, avoid dust from polluting the workshop environment, and at the same time prevent dust from entering the power component of the conveyor belt, causing the conveyor belt to get stuck.

[0040] On both sides of the main conveyor belt 1 and the auxiliary conveyor belt 2, side eaves plates 3 are provided. The conveying space of the main conveyor belt 1 and the auxiliary conveyor belt 2 is restricted by the side eaves plates 3. Further, main pushing plates 4 are arranged in a row on the side eaves plates 3 of the main conveyor belt 1, and auxiliary pushing plates 5 are arranged in a row on the side eaves plates 3 of the auxiliary conveyor belt 2. The conveying space is further partitioned by the main pushing plates 4 and the auxiliary pushing plates 5, and when the conveyor belt is inclined, a supporting and pushing effect is provided for the bauxite therein to ensure the smooth conveyance of the bauxite.

[0041] The main pushing plates 4 and the auxiliary pushing plates 5 of the present invention are arranged in a one-to-one correspondence manner. When conveying bauxite, not only the side eaves plates 3 at the top of the main conveyor belt 1 and the bottom of the auxiliary conveyor belt 2 are mutually attached, but also the main pushing plates 4 and the auxiliary pushing plates 5 can be mutually attached. Among them, the auxiliary pushing plate 5 adopts a hollow structure, and guide grooves 6 are provided on both sides thereof. A bracket 7 is installed in the auxiliary pushing plate 5 in a limited movement manner through the guide grooves 6, and closing plates 8 are fixedly installed on both sides of the bracket 7. A pop-up member 9 such as a spring is fixedly connected to the bottom of the bracket 7. The closing plates can be attached to both sides of the auxiliary pushing plate 5 without affecting the attachment of the auxiliary pushing plate 5 and the main pushing plate 4. At this time, the pop-up member 9 is in a compressed state. After the main pushing plate 4 and the auxiliary pushing plate 5 are relatively attached, the elastic force of the pop-up member 9 can pop out the closing plates 8, and the two closing plates 8 are connected to both sides of the main pushing plate 4, further enhancing the closing ability of the main pushing plate 4 and the auxiliary pushing plate 5 and preventing the dust on the main conveyor belt 1 from escaping into the space.

[0042] The closing plates 8 can cover the guide grooves 6 in both the retracted and popped states to prevent dust from entering the cavity of the auxiliary pushing plate 5. At the same time, a through groove is provided at the connection between the auxiliary pushing plate 5 and the side eaves plate 3 for the bracket 7 to pass through, and this through groove is covered by the auxiliary pushing plate 5 to avoid dust escaping from the side eaves plate 3. Both ends of the bracket 7 are connected with limit members 10, and a positioning seat 12 is fixedly installed on the outer wall of the side eaves plate 3. The limit members 10 are slidably connected in the positioning seat 12, and the end of the limit member 10 is connected with an end head 11. A spring pin 13 is provided on the side of the positioning seat 12, and a jack is provided on the limit member 10. Through the connection between the spring pin 13 and the jack, the limit member 10 can be fixed in the positioning seat 12. At this time, the closing plates 8 are retracted to both sides of the auxiliary pushing plate 5. There is a magnetic member 14 on the spring pin 13, and a magnetic seat 15 is installed at the bottom of the auxiliary conveyor belt 2. On the auxiliary pushing plate 5 located at the top of the auxiliary conveyor belt 2, the closing plates 8 are in a retracted state. As the auxiliary conveyor belt 2 rotates, when the auxiliary pushing plate 5 rotates to the bottom and is attached to the main pushing plate 4, it passes by the side of the magnetic seat 15, and the magnetic force of the magnetic seat 15 can cause the spring pin 13 to disengage from the limit member 10, so that the restrictions on the limit member 10, the bracket 7, and the closing plates 8 disappear, and the closing plates 8 can pop out and be connected to both sides of the main pushing plate 4 to enhance the closing effect of the main pushing plate 4 and the auxiliary pushing plate 5.

[0043] To ensure that after enclosed transportation, all the bauxite on the main conveyor belt 1 and the auxiliary conveyor belt 2 can enter the screening machine, and to avoid the residual bauxite from forming dust, an auxiliary cleaning component is provided at the top of the main conveyor belt 1. The residual bauxite is sent into the screening machine through the auxiliary cleaning component, and the auxiliary cleaning component is driven by the rotation of the main conveyor belt 1 itself. Specifically, an extension plate 16 is fixedly installed at the top of the main conveyor belt 1. A rotating shaft 18 is rotatably installed through the extension plate 16. And an extension shaft 17 is fixedly connected to the transmission shaft at the top of the main conveyor belt 1. A driving pulley 19 is connected to the extension shaft 17, and a driven pulley 20 is connected to the rotating shaft 18. The driving pulley 19 and the driven pulley 20 are connected by a belt. When the main conveyor belt 1 rotates, it can drive the rotating shaft 18 to rotate. A brush 21 is annularly installed on the rotating shaft 18. The brush 21 is located inside the screening machine. When it rotates, it can clean the bauxite on the main conveyor belt 1 into the screening machine to avoid residue.

[0044] Furthermore, a runner 22 is also installed on the extension shaft 17. A top ball 23 is annularly installed on the runner 22. And a push rod 24 higher than the position of the top ball 23 is also installed on the runner 22. When the runner 22 rotates, the top ball 23 and the push rod 24 can rotate continuously. At the same time, a spring guide rod 25 is provided on the main conveyor belt 1. A lifting frame 26 is movably installed through the spring guide rod 25. A bottom plate 27 is fixedly installed on the lifting frame 26. The bottom plate 27 is located above the runner 22. When the runner 22 rotates, when the top ball 23 contacts the bottom plate 27, it can make the lifting frame 26 move up and down intermittently. When the push rod 24 contacts the bottom plate 27, it can make the lifting frame 26 rise to a higher height. A top plate 28 is vertically installed on the lifting frame 26. A knocking component 29 is provided in the middle of the top plate 28. During the up and down movement of the lifting frame 26, it drives the knocking component 29 to continuously strike the side eaves plates 3 of the main conveyor belt 1 and the auxiliary conveyor belt 2, causing local vibration of the main conveyor belt 1 and the auxiliary conveyor belt 2 in the screening machine, reducing the residue of bauxite on the two conveyor belts. The knocking component 29 has a certain deformation ability.

[0045] Meanwhile, a locking rod 30 is installed on the top plate 28. In the present invention, the spacing of the main pushing plates 4 on the main conveyor belt 1 is set accordingly, such that when the runner 22 rotates one full circle, the main pushing plate 4 can exactly move one grid spacing along with the main conveyor belt 1. When the push rod 24 on the runner 22 jacks up the lifting frame 26, the locking rod 30 on the top plate 28 exactly moves to the position of the corresponding limiting member 10. The locking rod 30 can push the end head 11, thereby pushing the limiting member 10 and re-fixing it in the positioning seat 12, causing the closing plate 8 on the main pushing plate 4 to retract, so as to facilitate subsequent detachment from the auxiliary pushing plate 5. Since the height of the push rod 24 is higher than that of the top ball 23, only when the push rod 24 contacts the bottom plate 27 can the locking rod 30 push the end head 11. When the top ball 23 contacts the bottom plate 27, the locking rod 30 does not move to the position of the end head 11. Therefore, the knocking member 29 will not affect the closing of the closing plate 8 during operation.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw material conveying assembly for alumina production, characterized in that: It includes a main conveyor belt and a secondary conveyor belt, and the two are fitted and inclinedly installed through a support assembly; The main conveyor belt is located at the bottom and is used to convey the crushed bauxite to the screening machine. The secondary conveyor belt is located at the top and is used to receive and return the oversized materials separated by the screening machine, and at the same time serves as a dust-proof mechanism to cover the main conveyor belt; Side eaves plates are provided on both the main and secondary conveyor belts, and main push plates and secondary push plates are respectively arranged at intervals on the side eaves plates of the two; the secondary push plate is a hollow structure, and guide grooves are provided on both sides thereof. A pop-up closing plate is installed in the guide groove through a bracket, and a pop-up member is connected to the bottom of the bracket; A magnetic seat is provided at the bottom of the secondary conveyor belt. When the secondary push plate rotates with the secondary conveyor belt to the position where it fits with the main push plate, the magnetic seat triggers the closing plate to pop out and be hermetically connected to both sides of the main push plate; An auxiliary cleaning assembly driven by the main conveyor belt itself is provided at the top of the main conveyor belt, including a rotating brush and a lifting and knocking mechanism driven by a transmission mechanism. When the secondary push plate rotates with the secondary conveyor belt to the lifting and knocking mechanism, the closing plate is pushed to retract through the lifting and knocking mechanism.

2. The raw material conveying assembly for alumina production according to claim 1, wherein: The main push plates and the secondary push plates are arranged in one-to-one correspondence, and can fit together to form a dynamic continuous sealing surface during the operation of the conveyor belt.

3. A raw material conveying assembly for alumina production according to claim 1, characterized in that: The closing plate is slidably connected to the positioning seat on the outer wall of the side eaves plate through limit members at both ends of the bracket, and a spring pin with a magnetic member is provided on the positioning seat, and corresponding jacks are provided on the limit members; The magnetic seat can generate a magnetic attraction force on the magnetic member to cause the spring pin to be pulled out of the jack.

4. A raw material conveying assembly for alumina production according to claim 1, characterized in that: The auxiliary cleaning assembly includes an extension plate fixed to the top of the main conveyor belt. A driven pulley is installed on the extension plate through a rotating shaft. An extension shaft on the main conveyor belt drive shaft is connected with a driving pulley, and the two are linked by a belt to drive the rotating shaft to rotate.

5. The raw material conveying assembly for alumina production according to claim 4, wherein: Brushes extending into the screening machine are annularly arranged on the rotating shaft for cleaning the residual materials on the surface of the main conveyor belt.

6. A raw material conveying assembly for alumina production according to claim 5, characterized in that: A runner is installed on the extension shaft, and top balls and push rods higher than the top balls are annularly arranged on the surface of the runner.

7. The raw material conveying assembly for alumina production according to claim 6, characterized in that: A lifting frame is installed on the main conveyor belt through a spring guide rod. The bottom plate of the lifting frame cooperates with the top balls and push rods on the runner to realize an intermittent lifting movement.

8. A raw material conveying assembly for alumina production according to claim 7, characterized in that: A top plate is vertically installed on the lifting frame, and a knocking member is provided in the middle of the top plate, which generates vibration when hitting the side eaves plate during the movement of the lifting frame.

9. The raw material conveying assembly for alumina production according to claim 3 or 8, characterized in that: A locking rod is installed on the top plate. When the push rod jacks up the lifting frame, the locking rod synchronously pushes the limit member to reset to retract the closing plate; The distance between the main push plates is matched with the rotation period of the runner to ensure that the displacement of one main push plate corresponds to one rotation of the runner.

10. The raw material conveying assembly for alumina production according to claim 3, wherein: A through groove covered by the secondary push plate is provided at the connection between the secondary push plate and the side eaves plate for the bracket to pass through and prevent dust leakage.

11. The raw material conveying assembly for alumina production according to claim 1, wherein: The closing plate can completely cover the guide groove in both the popped-out and retracted states to prevent dust from entering the cavity of the secondary push plate.

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