A combined dust-proof device for screening machine

Abstract

The utility model discloses a combined dustproof device for a screening machine, comprising a first dustproof mechanism and a second dustproof mechanism, wherein the first dustproof mechanism comprises a first base, a first support assembly, a second support assembly and a first dustproof cover, wherein the first support assembly and the second support assembly are height-adjustable and are respectively arranged at the left and right ends of the first base, and the first dustproof cover is arranged at the top of the screening machine; the second dustproof mechanism comprises a first transmission assembly, a second transmission assembly, a transmission rod, a second dustproof cover and a second base, wherein the second base is detachably connected to the first base, the two ends of the transmission rod are respectively connected to the first transmission assembly and the second transmission assembly, and the second dustproof cover is arranged at the top of the second base. The first dustproof mechanism and the second dustproof mechanism of the utility model respectively use an electric push rod and a reduction motor as power to realize the lifting and lowering of the equipment and the adjustment of the position of the dustproof curtain, thereby improving the automation degree of the equipment and reducing the labor intensity of the staff.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-proof devices for screening machines, in particular to a combined dust-proof device for screening machines. Background Art

[0002] In the production of crushing, sand making, and mineral processing, the screening process is an indispensable and important link, and there are many kinds of screening equipment. When the screening machine is working, a large amount of dust and chips will be generated. Therefore, a dust cover is needed when the screening machine is working. The dust cover can prevent dust, chips, hard sand, etc. from splashing everywhere, reduce the damage of hard granular foreign matter to the precision parts of the instrument, and maintain the accuracy of the instrument. When the existing dust cover is used to prevent dust from the screening machine, the dust cover needs to be manually pulled to the outside of the screening machine, and the dust cover also needs to be manually retracted. The size of the screening machine is too large, and the dust cover is inconvenient to store. Therefore, it is necessary to design a new combined screening machine dust cover to solve the above technical problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and provide a combined dust-proof device for a screening machine, comprising a first dust-proof mechanism and a second dust-proof mechanism. The first dust-proof mechanism and the second dust-proof mechanism respectively use an electric push rod and a reduction motor as power to realize equipment lifting and dust curtain position adjustment, thereby improving the degree of automation of the equipment and reducing the labor intensity of the staff.

[0004] To achieve the above object, the technical solution adopted by the utility model is: a combined dustproof device for a screening machine, comprising a first dustproof mechanism and a second dustproof mechanism, wherein the second dustproof mechanism is installed on one side of the first dustproof mechanism;

[0005] The first dustproof mechanism comprises a first base, a first support assembly, a second support assembly and a first dustproof cover, wherein the first support assembly and the second support assembly are respectively arranged at the left and right ends of the first base along the length direction, the height of the first support assembly and the height of the second support assembly are both adjustable, the first dustproof cover is arranged on the top of the screening machine, and the left and right sides of the first dustproof cover are respectively in contact with the first support assembly and the second support assembly;

[0006] The second dustproof mechanism includes a first transmission assembly, a second transmission assembly, a transmission rod, a second dust cover and a second base. The second base is located in the middle of the first base along the length direction and is detachably connected to the side wall of the first base. The first transmission assembly and the second transmission assembly are respectively arranged on the side walls facing the first support assembly and the second support assembly. The left and right ends of the transmission rod are respectively connected to the first transmission assembly and the second transmission assembly. The second dust cover is arranged on the top of the second base, and the end of the second dust cover is connected to the transmission rod.

[0007] Preferably, the first support assembly and the second support assembly have the same structure, the first support assembly includes a telescopic plate, an electric push rod, a first support plate, a mounting plate, a support rod and a second support plate, the telescopic plate and the electric push rod are both installed between the first base and the first support plate, the first support plate is fixedly connected to the mounting plate on one side away from the telescopic plate, the support rod is an L-shaped structure, the end of the lateral end of the support rod is connected to the side wall of the mounting plate, and the end of the vertical end of the support rod is connected to the second support plate.

[0008] Preferably, the first dust cover includes a dust frame and a cover plate, the bottom of the cover plate is in contact with the top of the dust frame, the dust frame includes a fixed plate and an extension plug plate, the number of the fixed plates is multiple, and the multiple fixed plates are connected end to end and arranged along the side wall of the screening machine, each of the fixed plates is provided with a groove on the top, the number of the extension plug plates is consistent with the number of the fixed plates, the bottom of each extension plug plate matches the groove, each of the grooves is filled with the bottom of the extension plug plate so that the extension plug plate is installed on the fixed plate, and the top of each extension plug plate protrudes out of the screening machine after being installed on the fixed plate, and the bottom of the cover plate is respectively in contact with the second support plate and the top of the extension plug plate to form a closed structure.

[0009] Preferably, the first transmission assembly and the second transmission assembly have the same structure, the first transmission assembly includes a reduction motor, a chain, a first sprocket, a second sprocket and a first rotating shaft, the reduction motor is arranged on the outer side of the mounting plate, the first sprocket and the second sprocket are both arranged on the side of the mounting plate away from the reduction motor, the first sprocket is rotatably connected to the mounting plate via the first rotating shaft, the second sprocket is connected to the reduction motor via the first rotating shaft, a distance is left between the first sprocket and the second sprocket, there is a height difference between the first sprocket and the second sprocket, and the first sprocket and the second sprocket are connected by a chain.

[0010] Preferably, the transmission rod comprises a connecting rod and a cross rod, the left and right ends of the cross rod are connected to the connecting rod, and the end of each connecting rod away from the cross rod is connected to the chain.

[0011] Preferably, the first base includes a first base body and a fixing seat, the first base body is a square structure, fixing seats are arranged at the four corners of the first base body, and each of the fixing seats is provided with bolts to fix the first base body.

[0012] Preferably, the second base includes a connecting plate, a bottom plate, a vertical plate and a second rotating shaft, the end of the connecting plate along the length direction is fixedly connected to the side wall of the bottom plate, the end of the connecting plate away from the bottom plate is detachably connected to the side wall of the first base, the length of the vertical plate is consistent with the length of the bottom plate, the vertical plate is perpendicular to the bottom plate and the vertical plate is fixedly connected to the bottom plate along the length direction, and the end of the vertical plate away from the bottom plate is rotatably connected to the second rotating shaft.

[0013] Preferably, the second dust cover comprises a dust frame and a dust curtain, the dust curtain is wound around the second rotating shaft, the end of the dust curtain extends outward and is connected to the transmission rod, and the dust frame is located on the lower side of the dust curtain between the second rotating shaft and the transmission rod.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model includes a first dustproof mechanism and a second dustproof mechanism. The first dustproof mechanism and the second dustproof mechanism respectively use an electric push rod and a reduction motor as power to realize equipment lifting and dust curtain position adjustment, thereby improving the automation degree of the equipment and reducing the labor intensity of the staff.

[0016] 2. The utility model includes a first support assembly and a second support assembly. The height of the first support assembly and the height of the second support assembly can be adjusted according to the size of the screening machine, so that the cover plate can be overlapped on the first support assembly and the second support assembly, which improves the dustproof effect and facilitates the inspection of the internal situation of the screening machine.

[0017] 3. The utility model includes a first transmission assembly and a second transmission assembly. The first transmission assembly and the second transmission assembly synchronously drive the transmission rod to move up and down, so that the transmission rod drives the dust-proof curtain to cover the side of the screen machine located under the dust-proof curtain, thereby realizing all-round dust prevention of the screen machine.

[0018] 4. The first dustproof mechanism and the second dustproof mechanism of the utility model are detachably connected. When the screening machine starts working, the first dustproof mechanism and the second dustproof mechanism are connected to prevent dust together. After the screening machine finishes working, the second dustproof mechanism is removed from the first dustproof mechanism, which reduces the space occupied by the equipment and improves space utilization.

[0019] The present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model without the dustproof frame;

[0021] Figure 2 It is a structural schematic diagram of the positional relationship between the utility model and the screening machine;

[0022] Figure 3This is a structural schematic diagram of the working state of the second dust-proof mechanism of the utility model;

[0023] Figure 4 The utility model is a schematic diagram of a top view structure without the first dust cover.

[0024] Description of reference numerals:

[0025] 1—first base; 101—first base body;

[0026] 102—fixing seat; 103—bolt; 2—first supporting assembly;

[0027] 201—telescopic plate; 202—electric push rod; 203—first supporting plate;

[0028] 204—mounting plate; 205—support rod; 206—second support plate;

[0029] 3—second supporting assembly; 4—first dust cover;

[0030] 401—fixed plate; 402—extended plug plate; 403—groove;

[0031] 404—dustproof frame; 405—cover plate; 5—first transmission assembly;

[0032] 501—reduction motor; 502—chain; 503—first sprocket;

[0033] 504—second sprocket; 505—first rotating shaft; 6—second transmission assembly;

[0034] 7—transmission rod; 701—connecting rod; 702—cross bar;

[0035] 8—second dust cover; 801—dust curtain; 9—second base;

[0036] 901—connecting plate; 902—bottom plate; 903—vertical plate;

[0037] 904—second rotating shaft; 10—screening machine. DETAILED DESCRIPTION

[0038] like Figures 1 to 4As shown, the utility model includes a first dustproof mechanism and a second dustproof mechanism, and the second dustproof mechanism is installed on one side of the first dustproof mechanism; the first dustproof mechanism includes a first base 1, a first support assembly 2, a second support assembly 3 and a first dust cover 4, the first support assembly 2 and the second support assembly 3 are respectively arranged at the left and right ends of the first base 1 along the length direction, the height of the first support assembly 2 and the height of the second support assembly 3 are adjustable, the first dust cover 4 is arranged on the top of the screening machine 10, and the left and right sides of the first dust cover 4 are respectively in contact with the first support assembly 2 and the second support assembly 3; the second dustproof mechanism includes a first transmission assembly 5, a second transmission assembly 6, a transmission rod 7, a second dust cover 8 and a second base 9, the second base 9 is located in the middle of the first base 1 along the length direction and is detachably connected to the side wall of the first base 1, the first transmission assembly 5 and the second transmission assembly 6 are respectively arranged on the side walls facing the first support assembly 2 and the second support assembly 3, the left and right ends of the transmission rod 7 are respectively connected to the first transmission assembly 5 and the second transmission assembly 6, the second dust cover 8 is arranged on the top of the second base 9, and the end of the second dust cover 8 is connected to the transmission rod 7.

[0039] Fix the first base 1 on the ground at the bottom of the screen machine 10. At this time, the first support assembly 2 and the second support assembly 3 are respectively located on the left and right sides of the screen machine 10. Adjust the first support assembly 2 and the second support assembly 3 to a height so that the top of the first support assembly 2 and the second support assembly 3 matches the top height of the screen machine 10. Install the first dust cover 4 around the screen machine 10 so that the screen machine 10 forms a closed structure. The first support assembly 2 and the second support assembly 3 support the first dust cover 4 upwards. Determine whether to install the second dustproof mechanism according to the structure of the screen machine 10. If necessary, To install the second dustproof mechanism, the second base 9 is installed on the middle part of the side wall of the first base 1 along the length direction, and the left and right ends of the transmission rod 7 are respectively installed on the first transmission assembly 5 and the second transmission assembly 6. The second dust cover 8 is rotatably installed on the top of the second base 9. The end of the second dust cover 8 is connected to the transmission rod 7. The first transmission assembly 5 and the second transmission assembly 6 synchronously drive the transmission rod 7 to move up and down, and the transmission rod 7 drives the second dust cover 8 to extend or contract, so that the second dust cover 8 between the second base 9 and the transmission rod 7 can prevent the dust in the screening machine 10 from leaking out.

[0040] The first support assembly 2 and the second support assembly 3 have the same structure. The first support assembly 2 includes a telescopic plate 201, an electric push rod 202, a first support plate 203, a mounting plate 204, a support rod 205 and a second support plate 206. The telescopic plate 201 and the electric push rod 202 are both installed between the first base 1 and the first support plate 203. The side of the first support plate 203 away from the telescopic plate 201 is fixedly connected to the mounting plate 204. The support rod 205 is an L-shaped structure. The end of the lateral end of the support rod 205 is connected to the side wall of the mounting plate 204, and the end of the vertical end of the support rod 205 is connected to the second support plate 206.

[0041] The telescopic plate 201 and the electric push rod 202 are located at the end of the first base 1 along the length direction, the bottom of the telescopic plate 201 and the bottom of the electric push rod 202 are fixedly connected to the top of the first base 1, the top of the telescopic plate 201 and the top of the electric push rod 202 are fixedly connected to the lower side of the first support plate 203, start the electric push rod 202, the electric push rod 202 drives the telescopic plate 201 to synchronously push the first support plate 203 to move upward or downward, the upper side of the first support plate 203 is fixedly connected to the mounting plate 204, the second support plate 206 is connected to the side wall of the mounting plate 204 through the support rod 205, the up and down movement of the first support plate 203 can synchronously push the mounting plate 204 and the second support plate 206 to move upward or downward synchronously, according to the height of the screening machine 10, start the electric push rod 202 to adjust the mounting plate 204 and the second support plate 206 to the target height.

[0042] In another possible embodiment, a slide is provided at the vertical end of the support rod 205, and a self-locking device is provided on the slide. The slide extends downward along the end of the vertical end of the support rod 205 to the lateral end of the support rod 205. A slider is provided near the second support plate 206 near the support rod 205. The slider drives the support rod 205 to slide up and down along the slide. The height of the second support plate 206 is adjusted according to the position of the top of the extension plug plate 402. The slider slides up and down along the slide to the target position, and the slider is locked at the current position by the self-locking device to fix the position of the support plate 206.

[0043] The first dust cover 4 includes a dust frame 404 and a cover plate 405, the bottom of the cover plate 405 is in contact with the top of the dust frame 404, the dust frame 404 includes a fixed plate 401 and an extension plug plate 402, the number of the fixed plates 401 is multiple, and the multiple fixed plates 401 are connected end to end and arranged along the side wall of the screening machine 10, each fixed plate 401 is provided with a groove 403 on the top, the number of extension plug plates 402 is consistent with the number of fixed plates 401, the bottom of each extension plug plate 402 matches the groove 403, each groove 403 is filled with the bottom of the extension plug plate 402 so that the extension plug plate 402 is installed on the fixed plate 401, and the top of each extension plug plate 402 protrudes out of the screening machine 10 after being installed on the fixed plate 401, and the bottom of the cover plate 405 is respectively in contact with the second support plate 206 and the top of the extension plug plate 402 to form a closed structure.

[0044] According to the shape of the screening machine 10, the fixed plate 401 can be arranged along the inner wall or the outer wall of the screening machine 10, and the length of each fixed plate 401 matches the length of the side wall of the screening machine 10, ensuring that the left and right ends of the fixed plate 401 are consistent with the left and right ends of the current side wall of the screening machine 10, and the ends of two adjacent fixed plates 401 are in contact, and the bottom of the extended plug plate 402 is inserted into the groove 403, so that the extended plug plate 402 is tightly connected to the fixed plate 401, and the end of the extended plug plate 402 away from the fixed plate 401 protrudes from the top of the screening machine 10, and the top of the extended plug plate 402 is at the same height as the second support plate 206, which is convenient for supporting the cover plate 405, and the cover plate 405 is horizontally placed on the top of the frame formed by multiple extended plug plates 402, and the bottom of the first dust cover 4 is also in contact with the top of the second support plate 206. In order to improve the dustproof effect, the cover plate 403 and the second support plate 206 can be threadedly connected by bolts.

[0045] Furthermore, in order to reduce vibration, a shock-absorbing gasket may be provided at the connection between the fixed plate 401 and the screening machine 10 , and a shock-absorbing gasket may be provided on the top of the extended plug plate 402 to reduce the influence of the vibration of the extended plug plate 402 on the cover plate 403 .

[0046] The first transmission assembly 5 and the second transmission assembly 6 have the same structure. The first transmission assembly 5 includes a reduction motor 501, a chain 502, a first sprocket 503, a second sprocket 504 and a first rotating shaft 505. The reduction motor 501 is arranged on the outer side of the mounting plate 204. The first sprocket 503 and the second sprocket 504 are both arranged on the side of the mounting plate 204 away from the reduction motor 501. The first sprocket 503 is rotatably connected to the mounting plate 204 through the first rotating shaft 505. The second sprocket 504 is connected to the reduction motor 501 through the first rotating shaft 505. There is a distance between the first sprocket 503 and the second sprocket 504. There is a height difference between the first sprocket 503 and the second sprocket 504. The first sprocket 503 and the second sprocket 504 are connected through the chain 502.

[0047] The first sprocket 503 and the second sprocket 504 are both located on the inner side of the mounting plate 204, and the first sprocket 503 and the second sprocket 504 are respectively mounted at two ends of a diagonal of the mounting plate 204, the first sprocket 503 is mounted on the end of the mounting plate 204 away from the first support plate 203, the second sprocket 504 is mounted on the end of the mounting plate 204 close to the first support plate 204, the reduction motor 501 is mounted on the outer side of the mounting plate 204 corresponding to the second sprocket 504, the output shaft of the reduction motor 501 is connected to the second sprocket 504 through the first rotating shaft 505, the reduction motor 501 drives the second sprocket 504 to rotate, and since the second sprocket 504 and the first sprocket 503 are connected through the chain 502, the second sprocket 504 drives the first sprocket 503 to rotate synchronously through the chain 502, and the chain 502 rotates along the first sprocket 503 and the second sprocket 504.

[0048] The transmission rod 7 includes a connecting rod 701 and a cross rod 702 . The left and right ends of the cross rod 702 are connected to the connecting rod 701 . The end of each connecting rod 701 away from the cross rod 702 is connected to the chain 502 .

[0049] The connecting rod 701 is an L-shaped structure. The lateral end of the connecting rod 701 is detachably connected to the side of the chain 502 away from the mounting plate 204. The vertical end of the connecting rod 701 is fixedly connected to the end of the cross bar 702 away from the lateral end. The cross bar 702 is fixedly connected to the connecting rod 701 at both ends along the length direction. When the chain 502 rotates, it drives the connecting rod 701 and the cross bar 702 to move up and down synchronously.

[0050] Furthermore, each connecting rod 701 is provided with a through hole at its vertical end, which matches the cross bar 702. After the end of the cross bar 702 passes through the through hole, a limiting component is installed at the end of the cross bar 702 located outside the connecting rod 701 to prevent the cross bar 702 from slipping.

[0051] The first base 1 includes a first base body 101 and a fixing seat 102 . The first base body 101 is a square structure. The fixing seats 102 are arranged at the four corners of the first base body 101 . Each fixing seat 102 is provided with a bolt 103 to fix the first base body 101 through the bolt 103 .

[0052] The first base body 101 is set on the ground at the bottom of the screening machine 10, so that the screening machine 10 is located on the upper middle side of the first base body 101, and the first support assembly 2 and the second support assembly 3 installed on the first base body 101 are respectively located on the left and right sides of the screening machine 10. The first base body 101 is threadedly connected to the ground by bolts 103 to ensure that the first base body 101 is fixed in position.

[0053] In a possible embodiment, the number of the first base bodies 101 is two, and the first support assembly 2 and the second support assembly 3 are respectively installed on the two first base bodies 101, and a fixing seat 102 is provided at the four corners of each first base body 101, and each fixing seat 102 is provided with a bolt 103. The two first base bodies 101 are respectively fixed to the left and right sides of the screening machine 10 by the bolts 103, and the first support assembly 2 and the second support assembly 3 are respectively located on the left and right sides of the screening machine 10, thereby improving the applicability of the dustproof device.

[0054] In another possible embodiment, the first base body 101 includes a first bottom plate, a first extension plate and a second extension plate. The first extension plate and the second extension plate have the same structure. Hollow cavities are provided at the left and right ends of the first bottom plate. The first extension plate and the second extension plate can both move left and right along the hollow cavity to adjust the length of the first base body 101. Threaded holes are provided on the side walls on the front and rear sides of the hollow cavity of the first bottom plate, and threaded holes with the same aperture are provided on the side walls on the front and rear sides of the first extension plate and the second extension plate. The first extension plate slides into the hollow cavity on the left side of the first bottom plate along the left end portion of the first bottom plate, and the second extension plate slides into the hollow cavity on the right side of the first bottom plate along the right end portion of the first bottom plate. The first support assembly 2 and the second support assembly 3 are respectively installed at the ends of the first extension plate and the second extension plate that are away from each other. When the first support assembly 2 and the second support assembly 3 are respectively located at appropriate positions on the left and right sides of the screening machine 10, the position adjustment of the first extension plate and the second extension plate is completed, and the first extension plate is fixedly connected to the first bottom plate by bolts, and the second extension plate is fixedly connected to the first bottom plate by bolts. Mounting seats are provided at the ends away from each other of the first extension plate and the second extension plate, and the first extension plate and the second extension plate are fixed to the ground by the mounting seats, that is, the first base body 101 is fixed to the ground.

[0055] The second base 9 includes a connecting plate 901, a bottom plate 902, a vertical plate 903 and a second rotating shaft 904. The end of the connecting plate 901 along the length direction is fixedly connected to the side wall of the bottom plate 902, and the end of the connecting plate 901 away from the bottom plate 902 is detachably connected to the side wall of the first base 1. The length of the vertical plate 903 is consistent with the length of the bottom plate 902. The vertical plate 903 is perpendicular to the bottom plate 902 and the vertical plate 903 is fixedly connected to the bottom plate 902 along the length direction. The end of the vertical plate 903 away from the bottom plate 902 is rotatably connected to the second rotating shaft 904.

[0056] A mounting groove is provided in the middle of the side wall along the length direction of the first base body 101, and the connecting plate 901 and the bottom plate 902 form a T-shaped structure. The end of the connecting plate 901 away from the bottom plate 902 is installed in the mounting groove, and the side wall of the bottom plate 902 along the length direction is fixedly connected to the end of the connecting plate 901, and the vertical plate 903 is vertically installed on the bottom plate 902. The vertical plate 903 is a transparent plate for convenient observation of the internal situation of the screening machine 10. A recess is provided at the end of the vertical plate 903 away from the bottom plate 902, and the second rotating shaft 904 is installed in the recess along the length direction and the left and right ends of the second rotating shaft 904 extend outward from the vertical plate 903 in the horizontal direction. Limiting components are installed on the left and right ends of the second rotating shaft 904, and the second rotating shaft 904 can rotate in the recess. A coil spring is provided in the second rotating shaft 904.

[0057] In another possible embodiment, the second base 9 includes a bottom plate 902, a vertical plate 903 and a second rotating shaft 904. The vertical plate 903 is a transparent plate and is vertically mounted on the bottom plate 902. The second rotating shaft 904 is rotatably mounted on the end of the vertical plate 903 away from the bottom plate 902. A coil spring is arranged inside the second rotating shaft 904. Fixed seats are arranged at the four corners of the bottom plate 902. Bolts are arranged on the fixed seats. The bottom plate 902 is fixedly connected to the ground by bolts.

[0058] The second dust cover 8 includes a dust frame 404 and a dust curtain 801. The dust curtain 801 is wound around the second rotating shaft 904. The end of the dust curtain 801 extends outward and is connected to the transmission rod 7. The dust frame 404 is located on the lower side of the dust curtain 801 between the second rotating shaft 904 and the transmission rod 7.

[0059] The dust-proof curtain 801 is wound around the second rotating shaft 904, and the end of the dust-proof curtain 801 is connected to the cross bar 702. The chain 502 drives the connecting rod 701 to move up and down, and the connecting rod 701 simultaneously drives the cross bar 702 to move up and down. The dust-proof curtain 801 connected to the cross bar 702 extends outward or is wound around the second rotating shaft 904, so that the dust-proof curtain 801 between the cross bar 702 and the second rotating shaft 904 covers the dust-proof frame 404 located on the lower side of the dust-proof curtain 801, thereby having a dust-proof effect on the side of the screening machine 10.

[0060] When in use, first, according to the size of the screen machine 10, the first base 1 is fixed to the bottom of the screen machine 10, and the fixed plate 401 is fixedly arranged along the inner wall of the screen machine 10. The multiple fixed plates 401 are connected end to end and are located at the same height. The extension plug plate 402 is inserted into the groove 403 of each fixed plate 401, and the end of the extension plug plate 402 away from the fixed plate 401 protrudes out of the screen machine 10. The first support assembly 2 and the second support assembly 3 on the left and right sides of the first base 1 are respectively located at appropriate positions on the left and right sides of the screen machine 10, and the electric push rod 202 is started. The electric push rod 202 drives the telescopic plate 201 to push the first support plate 203 to move upward or downward until the second support plate 20 6 is the same height as the extension plug plate 402, the cover plate 403 is horizontally placed on the extension plug plate 402 and the second support plate 206, then the connecting plate 901 is installed in the installation groove of the side wall of the first base 1, the end of the dust curtain 801 is connected to the cross bar 702, the reduction motor 501 is started, the reduction motor 501 drives the second sprocket 504 to rotate, and under the cooperation of the chain 502, the first sprocket 503 and the connecting rod 701, the cross bar 702 drives the dust curtain 801 to reach the target position, so that the dust curtain 801 between the cross bar 702 and the second rotating shaft 904 completely covers the dust frame 404 located at the lower side of the dust curtain 801, thereby improving the dustproof effect of the dustproof device.

[0061] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A combined dust prevention device for a screening machine, characterized in that: It comprises a first dustproof mechanism and a second dustproof mechanism, wherein the second dustproof mechanism is installed on one side of the first dustproof mechanism; The first dustproof mechanism comprises a first base (1), a first support assembly (2), a second support assembly (3) and a first dustproof cover (4); the first support assembly (2) and the second support assembly (3) are respectively arranged at left and right ends of the first base (1) along the length direction; the height of the first support assembly (2) and the height of the second support assembly (3) are both adjustable; the first dustproof cover (4) is arranged on the top of the screening machine (10); the left and right sides of the first dustproof cover (4) are respectively in contact with the first support assembly (2) and the second support assembly (3); The second dustproof mechanism comprises a first transmission assembly (5), a second transmission assembly (6), a transmission rod (7), a second dustproof cover (8) and a second base (9); the second base (9) is located in the middle of the first base (1) along the length direction and is detachably connected to the side wall of the first base (1); the first transmission assembly (5) and the second transmission assembly (6) are respectively arranged on the side walls of the first support assembly (2) and the second support assembly (3) facing each other; the left and right ends of the transmission rod (7) are respectively connected to the first transmission assembly (5) and the second transmission assembly (6); the second dustproof cover (8) is arranged on the top of the second base (9); and the end of the second dustproof cover (8) is connected to the transmission rod (7).

2. A combined dust prevention device for a screening machine according to claim 1, characterized in that: The first support assembly (2) and the second support assembly (3) have the same structure. The first support assembly (2) comprises a telescopic plate (201), an electric push rod (202), a first support plate (203), a mounting plate (204), a support rod (205) and a second support plate (206). The telescopic plate (201) and the electric push rod (202) are both mounted between the first base (1) and the first support plate (203). A side of the first support plate (203) away from the telescopic plate (201) is fixedly connected to the mounting plate (204). The support rod (205) is an L-shaped structure. The end of the lateral end of the support rod (205) is connected to the side wall of the mounting plate (204), and the end of the vertical end of the support rod (205) is connected to the second support plate (206).

3. A combined dust prevention device for a screening machine according to claim 2, characterized in that: The first dust cover (4) comprises a dust frame (404) and a cover plate (405), the bottom of the cover plate (405) is in contact with the top of the dust frame (404), the dust frame (404) comprises a fixed plate (401) and an extended plug plate (402), the number of the fixed plates (401) is multiple, the multiple fixed plates (401) are connected end to end and arranged along the side wall of the screening machine (10), the top of each of the fixed plates (401) is provided with a groove (403), the number of the extended plug plates (402) is the same as the number of the fixed plates (401). The number of fixed plates (401) is consistent, the bottom of each extended plug plate (402) matches the groove (403), each groove (403) is filled with the bottom of the extended plug plate (402) so that the extended plug plate (402) is installed on the fixed plate (401), and the top of each extended plug plate (402) protrudes out of the screen machine (10) after being installed on the fixed plate (401), and the bottom of the cover plate (405) is respectively in contact with the second support plate (206) and the top of the extended plug plate (402) to form a closed structure.

4. A combined dust prevention device for a screening machine according to claim 2, characterized in that: The first transmission assembly (5) and the second transmission assembly (6) have the same structure. The first transmission assembly (5) comprises a reduction motor (501), a chain (502), a first sprocket (503), a second sprocket (504) and a first rotating shaft (505). The reduction motor (501) is arranged on the outside of the mounting plate (204). The first sprocket (503) and the second sprocket (504) are both arranged on a side of the mounting plate (204) away from the reduction motor (501). The first sprocket (503) is rotatably connected to the mounting plate (204) via a first rotating shaft (505), the second sprocket (504) is connected to the reduction motor (501) via the first rotating shaft (505), a distance is left between the first sprocket (503) and the second sprocket (504), there is a height difference between the first sprocket (503) and the second sprocket (504), and the first sprocket (503) and the second sprocket (504) are connected via a chain (502).

5. A combined dust prevention device for a screening machine according to claim 4, characterized in that: The transmission rod (7) comprises a connecting rod (701) and a cross rod (702), the left and right ends of the cross rod (702) are connected to the connecting rod (701), and the end of each connecting rod (701) away from the cross rod (702) is connected to the chain (502).

6. A combined dust prevention device for a screening machine according to claim 5, characterized in that: The first base (1) comprises a first base body (101) and a fixing seat (102); the first base body (101) is a square structure; the fixing seats (102) are arranged at the four corners of the first base body (101); each of the fixing seats (102) is provided with a bolt (103) for fixing the first base body (101) via the bolt (103).

7. A combined dust prevention device for a screening machine according to claim 3, characterized in that: The second base (9) comprises a connecting plate (901), a bottom plate (902), a vertical plate (903) and a second rotating shaft (904); the end of the connecting plate (901) along the length direction is fixedly connected to the side wall of the bottom plate (902); the end of the connecting plate (901) away from the bottom plate (902) is detachably connected to the side wall of the first base (1); the length of the vertical plate (903) is consistent with the length of the bottom plate (902); the vertical plate (903) is perpendicular to the bottom plate (902) and the vertical plate (903) is fixedly connected to the bottom plate (902) along the length direction; the end of the vertical plate (903) away from the bottom plate (902) is rotatably connected to the second rotating shaft (904).

8. A combined dust prevention device for a screening machine according to claim 7, characterized in that: The second dust cover (8) comprises a dust frame (404) and a dust curtain (801), wherein the dust curtain (801) is wound around the second rotating shaft (904), and the end of the dust curtain (801) extends outward and is connected to the transmission rod (7), and the dust frame (404) is located on the lower side of the dust curtain (801) between the second rotating shaft (904) and the transmission rod (7).

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