Sectional type roller screen with detachable side plates

Abstract

The utility model discloses a sectional type roller screen with detachable side plates, and relates to the technical field of roller screens, the sectional type roller screen specifically comprises a shell, a screen shaft assembly, a cleaning device, a driving device, a bypass device, an inlet hopper, an outlet hopper and a safety guardrail, the shell is of a sectional type structure and comprises a sectional type upper box body and a sectional type lower base; the sectional type upper box body comprises a first upper box body, a second upper box body, a third upper box body, a first detachable side plate, a second detachable side plate and a third detachable side plate. According to the sectional type roller screen with the detachable side plates, through the design of the sectional type shell, the problems that an existing hoisting hole is small on site, and large pieces cannot pass through the hoisting hole are solved; by means of the design that the detachable side plates are arranged on the shell, the problem that an upper box body needs to be damaged when a screen shaft assembly and the like are checked is solved. Through the double shaft end sealing technology and the design of the sealing plate, the sealing performance of the roller screen is improved, the powder leakage probability is reduced, and the roller screen is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of roller screens, in particular to a segmented roller screen with detachable side plates. Background Technique

[0002] As a large and medium-sized screening device, the roller screen has the advantages of simple structure, small layout space, stable operation, low noise, etc., and is thus widely used in the coal conveying systems of industries such as electric power, metallurgy, chemical industry, building materials, and mining.

[0003] However: 1. The existing roller screens are generally integral, with large external dimensions and heavy weights, making it difficult to pass through the existing lifting holes in the installation building and transport them to the expected installation position with existing hoisting devices such as electric hoists in the building. Usually, methods such as drilling holes in the wall and then using a crane for hoisting are adopted, or large components such as the upper box body and the lower base of the roller screen are cut into several parts and then transported to the expected installation position through the lifting holes using existing hoisting devices such as electric hoists. The new equipment often becomes old equipment after cutting.

[0004] 2. Limited by various conditions, the maintenance of the screen shaft assembly of the on-site roller screen often requires cutting the box body with gas welding to remove the screen shaft assembly, etc. The maintenance workload and safety risks are increased.

[0005] 3. Powder leakage after the long-term operation of the roller screen has always been a troublesome problem.

[0006] Therefore, it is of great practical significance to develop a segmented roller screen with detachable side plates and improved sealing. Content of the Utility Model

[0007] The utility model provides a segmented roller screen with detachable side plates, which solves the problems of difficult installation, large maintenance workload and safety risks, and powder leakage after long-term operation mentioned in the above background technique.

[0008] The utility model provides the following technical solution: a sectional roller screen with detachable side plates, which comprises a housing, a screen shaft assembly, a cleaning device, a driving device, a bypass device, an inlet hopper, an outlet hopper and a safety guardrail. The housing is of a sectional structure and includes a sectional upper box body and a sectional lower base. The sectional upper box body includes upper box body one, upper box body two, upper box body three, detachable side plate one, detachable side plate two and detachable side plate three. Connecting plates are fixed to the inner walls of both sides of upper box body one, upper box body two and upper box body three. Detachable side plate one, detachable side plate two and detachable side plate three are respectively fixed to the corresponding connecting plates through first threaded connectors, and sealing plates and second threaded connectors are arranged on the sides of detachable side plate one, detachable side plate two and detachable side plate three. Two inspection windows are arranged at the top of the sectional upper box body. Wear-resistant liners are respectively fixed to the lower half parts of the inner walls of upper box body one, upper box body two and upper box body three through countersunk head screw connectors, and a protective plate is connected to the lower end of the wear-resistant liner.

[0009] The sectional upper box body is connected to the sectional lower base through flange threaded connectors two. The sectional lower base includes lower base one, lower base two and lower base three. A guide plate one is arranged at the inner outlet end of lower base one, and a guide plate two is arranged at the bypass outlet end of lower base three.

[0010] The horizontal inclination angle of lower base one is adapted to the horizontal inclination angle α1 of upper box body one, and 0°≤α1≤5°; the horizontal inclination angle of lower base two is adapted to the horizontal inclination angle α2 of upper box body two, and 5°≤α2≤10°; the horizontal inclination angle of lower base three is adapted to the horizontal inclination angle α3 of upper box body three, and 10°≤α3≤15°.

[0011] Multiple sets of screen shaft assemblies are arranged in the housing, and the screen shaft assemblies are sealed with the housing through shaft end seals. The shaft end seals include two-stage seals: the primary seal is a felt seal 303a, and the secondary seal is a leather cup seal 303b.

[0012] Preferably, each set of screen shaft assemblies includes screen sheets, a screen shaft and shaft end seals. The screen sheets are parabolic screen sheets. The end of the screen shaft is movably connected to the housing. The protective plate protects the part of the screen shaft passing through the wall. Screen sheets are installed on the screen shaft, and the screen sheets on adjacent two screen shafts are arranged staggeredly to form a rolling screen surface.

[0013] Preferably, the cleaning device is installed on the inner wall of the sectional lower base, and a set of cleaning device is installed directly below each set of screen shaft assemblies. The cleaning device includes a comb tooth support fixedly connected to the inner wall of the sectional lower base and comb teeth fixed to the comb tooth support.

[0014] Preferably, the interfaces between adjacent components of the outlet hopper, the first upper box body, the second upper box body, the third upper box body, the inlet hopper and the segmented lower base are connected by the first flange threaded connectors; safety guardrails are welded on the first upper box body, the second upper box body, the third upper box body and the outlet hopper.

[0015] The interfaces between adjacent components of the first lower base, the second lower base, the third lower base, the segmented upper box body, the bypass device and the outlet hopper are connected by the second flange threaded connectors; the bypass device is connected to the outer side wall of the third lower base through a fixed support; drive device mounting bases are installed on the first lower base, the second lower base and the third lower base.

[0016] Preferably, upper half flanges are installed on the lower parts of the outer walls on both sides of the first detachable side plate, the second detachable side plate and the third detachable side plate; lower half flanges are installed on the upper parts of the outer walls on both sides of the first lower base, the second lower base and the third lower base; the upper half flanges are adapted to the lower half flanges; the shaft end seal is fixed on the outside of the structure formed by the upper half flange and the lower half flange.

[0017] Preferably, the drive device is connected to the segmented lower base through a drive device mounting base, and the end of the output shaft of the drive device is connected to the end of the sieve shaft.

[0018] Preferably, the bypass device includes a three-way baffle, an asymmetric flow guide cone, an electric push rod and an electric push rod limit device; the asymmetric flow guide cone is installed at about one-third off-center of the three-way baffle; the electric push rod is installed on the fixed support; the bypass device is connected to the segmented upper box body and the segmented lower base through the first flange threaded connectors, a connecting plate and the first threaded connectors.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] 1. For the segmented roller screen with detachable side plates, through the design of the segmented shell, the problem that the hoisting hole on site is small and large parts cannot pass through is solved; through the design of setting detachable side plates on the shell, the problem that the inspection of the sieve shaft assembly and the like requires damaging the upper box body is solved; through the double shaft end sealing technology and the design of the sealing plate, the sealing performance of the roller screen is improved, the probability of powder leakage is reduced, and the use of the roller screen is facilitated.

[0021] 2. For the segmented roller screen with detachable side plates, through the setting of the inspection window, it is convenient for the staff to check the wear condition of the sieve shaft and sieve plates in the inner cavity of the roller screen and whether there is coal blockage or other situations; through the setting of the wear-resistant plate lining, the influence of the screening material on the shell is reduced, and the service life of the shell is prolonged; through the setting of the protection plate, the direct scouring of the through-wall part of the sieve shaft assembly by the material can be reduced, and the sealing performance between the sieve shaft and the shell is guaranteed. Description of the Drawings

[0022] Figure 1 This is a front view schematic diagram of the structure of the present utility model;

[0023] Figure 2 This is the structure of the present utility model Figure 1 Top view schematic diagram;

[0024] Figure 3 This is the structure of the present utility model Figure 1 Left side view schematic diagram;

[0025] Figure 4 This is a sectional upper box body schematic diagram of the structure of the present utility model;

[0026] Figure 5 This is the structure of the present utility model Figure 4 Left side view schematic diagram;

[0027] Figure 6 This is a sectional lower base schematic diagram of the structure of the present utility model;

[0028] Figure 7 This is a top view schematic diagram of the sieve shaft assembly of the structure of the present utility model;

[0029] Figure 8 This is the structure of the present utility model Figure 7 Left side view schematic diagram;

[0030] Figure 9 This is an enlarged schematic diagram of the shaft end seal of the structure of the present utility model;

[0031] Figure 10 This is a schematic diagram of the cross arrangement of the sieve shaft assembly of the structure of the present utility model;

[0032] Figure 11 This is a schematic diagram of the cleaning device of the structure of the present utility model;

[0033] Figure 12 This is a schematic diagram of the bypass device of the structure of the present utility model.

[0034] In the figure: 1. Segmented upper box body; 2. Segmented lower base; 3. Screen shaft assembly; 4. Cleaning device; 5. Driving device; 6. Bypass device; 7. Inlet hopper; 8. Outlet hopper; 9. Safety guardrail; 10. Bearing seat; 101. First upper box body; 102. Second upper box body; 103. Third upper box body; 104. Removable side plate one; 105. Removable side plate two; 106. Removable side plate three; 107. Inspection window; 108. Flange threaded connector one; 109. Connecting plate; 110. First threaded connector; 111. Sealing plate; 112. Second threaded connector; 113. Wear-resistant lining plate; 114. Countersunk head screw connector; 115. Protection plate; 116. Upper half flange; 201. First lower base; 202. Second lower base; 203. Third lower base; 204. Lower half flange; 205. Flange threaded connector two; 206. Fixed support; 207. First deflector; 208. Second deflector; 209. Driving device mounting base; 301. Screen; 302. Screen shaft; 303. Shaft end seal; 303a. Felt seal; 303b. Leather cup seal; 401. Comb teeth; 402. Comb teeth support; 601. Three-way baffle; 602. Asymmetric deflector cone; 603. Electric push rod; 604. Electric push rod limit device. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, 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 creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention provides a segmented roller screen with removable side plates, including a housing, a screen shaft assembly 3, a cleaning device 4, a driving device 5, a bypass device 6, an inlet hopper 7, an outlet hopper 8, and a safety guardrail 9. The housing is a segmented structure, and the segmented design concept can perfectly solve the problem that the hoisting hole on site is small and large parts cannot pass through. The housing includes a segmented upper box body 1 and a segmented lower base 2. The segmented upper box body 1 includes a first upper box body 101, a second upper box body 102, a third upper box body 103, a removable side plate one 104, a removable side plate two 105, and a removable side plate three 106.

[0037] The interfaces between adjacent components of the outlet hopper 8, the first upper box body 101, the second upper box body 102, the third upper box body 103, the inlet hopper 7, and the segmented lower base 2 are connected by a flange threaded connector one 108.

[0038] On the inner walls of the two sides of the upper box body one 101, the upper box body two 102, and the upper box body three 103, connecting plates 109 are fixed. The detachable side plate one 104, the detachable side plate two 105, and the detachable side plate three 106 are respectively fixed on the corresponding connecting plates 109 through the first threaded connectors 110. And on the sides of the detachable side plate one 104, the detachable side plate two 105, and the detachable side plate three 106, sealing plates 111 and second threaded connectors 112 are provided. Through the setting of the sealing plates 111, it can prevent dust from leaking out between the detachable side plate one 104, the detachable side plate two 105, and the detachable side plate three 106, and improve the sealing performance of the housing.

[0039] On the top of the segmented upper box body 1, two inspection windows 107 are provided, which are used to check the wear condition of the sieve shafts and sieve plates in the inner cavity of the roller screen and whether there is coal blockage or other situations.

[0040] On the lower half of the inner walls of the upper box body one 101, the upper box body two 102, and the upper box body three 103, wear-resistant liners 113 are respectively fixed with countersunk head screw connectors 114. The lower ends of the wear-resistant liners 113 are connected with protective plates 115. The function of the protective plates 115 is to reduce the direct scouring of the part of the sieve shaft assembly 3 passing through the wall by the material during the operation of the equipment.

[0041] Safety guardrails 9 are welded on the upper box body one 101, the upper box body two 102, the upper box body three 103, and the outlet hopper 8. On the lower parts of the outer walls on both sides of the detachable side plate one 104, the detachable side plate two 105, and the detachable side plate three 106, upper half flanges 116 are welded for fixing the sealing device.

[0042] To improve the screening efficiency of the roller screen, the horizontal inclination angle of the upper box body one 101 is α1, and 0°≤α1≤5°. The horizontal inclination angle of the upper box body two 102 is α2, and 5°≤α2≤10°. The horizontal inclination angle of the upper box body three 103 is α3, and 10°≤α3≤15°.

[0043] The segmented upper box body 1 is connected to the segmented lower base 2 through the flange threaded connector two 205. The segmented lower base 2 includes the lower base one 201, the lower base two 202, and the lower base three 203. On the upper half of the outer walls on both sides of the lower base one 201, the lower base two 202, and the lower base three 203, lower half flanges 204 are welded for fixing the sealing device. The upper half flange 116 is adapted to the lower half flange 204.

[0044] The interfaces between the lower base one 201, the lower base two 202, the lower base three 203 and the adjacent components of the segmented upper box body 1, the bypass device 6 and the outlet hopper 8 are connected by flange threaded connectors two 205. A fixed support 206 is welded on the outer side wall of the lower base three 203 for fixing the components of the bypass device 6. A deflector one 207 is arranged at the internal outlet end of the lower base one 201 to direct the coal flow to a predetermined flow direction. A deflector two 208 is arranged at the bypass outlet end of the lower base three 203 to direct the coal flow to a predetermined flow direction. Drive device installation bases 209 are welded on the lower base one 201, the lower base two 202 and the lower base three 203. The drive device 5 is connected to the segmented lower base 2 through the drive device installation base 209. The drive device 5 is a prior art and includes components such as a motor, a reducer, and a coupling.

[0045] The horizontal inclination angle of the lower base one 201 is adapted to the horizontal inclination angle α1 of the upper box body one 101; the horizontal inclination angle of the lower base two 202 is adapted to the horizontal inclination angle α2 of the upper box body two 102; the horizontal inclination angle of the lower base three 203 is adapted to the horizontal inclination angle α3 of the upper box body three 103 to ensure the sealing performance of the housing.

[0046] It can be seen from the above description that when the present application is in use, through the design of the detachable side plate, the problem that the inspection of the sieve shaft assembly etc. requires damaging the upper box body can be solved.

[0047] Multiple sets of sieve shaft assemblies 3 are arranged in the housing. Each set of sieve shaft assemblies 3 includes sieve plates 301, sieve shafts 302 and shaft end seals 303. The sieve plates 301 are parabolic sieve plates, which give a large piece of material a force upward and forward during operation, causing the material to be thrown up and increasing the screening penetration rate. The end of the sieve shaft 302 is movably connected to the housing. The protective plate 115 protects the part of the sieve shaft 302 passing through the wall, and the sieve shaft 302 and the housing are sealed through the shaft end seal 303. The shaft end seal 303 includes two-stage seals: the primary seal is a felt seal 303a, and the secondary seal is a leather cup seal 303b. Dozens of wear-resistant sieve plates 301 are installed on each sieve shaft 302. The sieve plates 301 on adjacent two sieve shafts 302 are staggered to form a rolling sieve surface. The sieve plates 301 are made of wear-resistant cast steel. Both ends of the sieve shaft 302 are supported by bearing seats 10, and the end of the output shaft of the drive device 5 is connected to one end of the sieve shaft 302. The sieve shaft 302 is made of chromium-containing alloy steel.

[0048] The above-mentioned sealing device is the shaft end seal 303. When the segmented upper box body 1 and the segmented lower base 2 are connected, the shaft end seal 303 is fixed on the outside of the structure composed of the upper half flange 116 and the lower half flange 204, and the felt seal 303a is located on the side close to the housing of the leather cup seal 303b.

[0049] The cleaning device is installed on the inner wall of the segmented lower base 2. A set of cleaning devices 4 are installed directly below each set of sieve shaft assemblies 3. The cleaning device 4 includes a comb tooth support 402 fixedly connected to the inner wall of the segmented lower base 2 and a comb tooth 401 fixedly connected to the comb tooth support 402. Through the arrangement of the cleaning device 4, the cleaning device 4 is in the shape of a comb, which can effectively remove the sundries and accumulated coal wrapped around the sieve plate and the sieve shaft 302, preventing the sieve shaft from being blocked and jammed.

[0050] The bypass device 6 includes a three-way baffle 601, an asymmetric flow guiding cone 602, an electric push rod 603, an electric push rod limit device 604, etc. The three-way baffle 601 is made of a smooth and wear-resistant material. The asymmetric flow guiding cone 602 is welded at about one-third of the center deviation of the three-way baffle. Its function is to disperse the incoming material as much as possible to make the screening of the roller screen more sufficient. The electric push rod 603 is an electric rod with a handwheel, which is convenient to operate the electric push rod in a manual way in an abnormal position such as power failure or over-limit. The electric push rod limit device 604 is mainly used to control the extreme position of the electric push rod 603 to avoid damage. The electric push rod 603 is installed on the fixed support 206 of the segmented lower base 2. The bypass device 6 is connected to the segmented upper box body 1 and the segmented lower base 2 through flange threaded connectors 108, connecting plates 109 and first threaded connectors 110.

[0051] In summary: During the installation process of the segmented roller screen with detachable side plates, it can be disassembled into multiple segments. After using existing hoisting devices such as electric hoists through the lifting holes to transport each part at the disassembly point to the planned installation position, then use flange threaded connectors 108, flange threaded connectors 205, first threaded connectors 110 or second threaded connectors 112 to piece together each part, reducing the transportation and installation difficulty of the roller screen.

[0052] When the segmented roller screen with detachable side plates works, the material enters the inside of the roller screen through the inlet hopper 7. When the material passes through the bypass device 6, the bypass device 6 disperses the incoming material as much as possible to make the screening of the roller screen more sufficient. The driving device 5 drives the sieve shaft 302 to rotate, and the sieve shaft 302 drives the sieve plate 301 fixedly connected thereto to rotate. The sieve plate 301 gives a large piece of material a force upward and forward, causing the material to be thrown up, increasing the screening rate. And during the screening process, the cleaning device can effectively remove the sundries and accumulated coal wrapped around the sieve plate and the sieve shaft, preventing the sieve shaft from being blocked and jammed. The screened material is discharged through the outlet hopper 8. During this process, using the shaft end seal 303 and the seal plate 111 can improve the sealing performance of the roller screen, reduce the probability of powder leakage, and facilitate the use of the roller screen.

[0053] When the side plate detachable sectional roller screen is under maintenance, the staff can check the wear condition of the sieve shafts and sieve plates inside the roller screen and whether there is coal jamming through the inspection window 107. If the roller screen needs to be maintained, the staff can perform maintenance on it by disassembling the detachable side plate 1 104, the detachable side plate 2 105 or the detachable side plate 3 106, solving the problem that the inspection of the sieve shaft assembly and the like requires damaging the upper box body.

[0054] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt the conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present utility model 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 principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A sectional roller screen with detachable side plates, comprising a housing, a screen shaft assembly (3), a cleaning device (4), a driving device (5), a bypass device (6), an inlet hopper (7), an outlet hopper (8) and a safety guardrail (9), characterized in that: The housing is of a segmented structure, including a segmented upper box body (1) and a segmented lower base (2); the segmented upper box body (1) includes an upper box body one (101), an upper box body two (102), an upper box body three (103), a detachable side plate one (104), a detachable side plate two (105) and a detachable side plate three (106). Connecting plates (109) are fixed to the inner walls of both sides of the upper box body one (101), the upper box body two (102) and the upper box body three (103). The detachable side plate one (104), the detachable side plate two (105) and the detachable side plate three (106) are respectively fixed to the corresponding connecting plates (109) through first threaded connectors (110). And sealing plates (111) and second threaded connectors (112) are provided on the sides of the detachable side plate one (104), the detachable side plate two (105) and the detachable side plate three (106). Two inspection windows (107) are provided at the top of the segmented upper box body (1). Wear-resistant liners (113) are respectively fixed to the lower half parts of the inner walls of the upper box body one (101), the upper box body two (102) and the upper box body three (103) through countersunk head screw connectors (114). A protective plate (115) is connected to the lower end of the wear-resistant liner (113). The segmented upper box body (1) is connected to the segmented lower base (2) through flange threaded connectors two (205). The segmented lower base (2) includes a lower base one (201), a lower base two (202) and a lower base three (203). A guide plate one (207) is provided at the internal outlet end of the lower base one (201). A guide plate two (208) is provided at the bypass outlet end of the lower base three (203). The horizontal inclination angle of the lower base one (201) is adapted to the horizontal inclination angle α1 of the upper box body one (101), and 0° ≤ α1 ≤ 5°; the horizontal inclination angle of the lower base two (202) is adapted to the horizontal inclination angle α2 of the upper box body two (102), and 5° ≤ α2 ≤ 10°; the horizontal inclination angle of the lower base three (203) is adapted to the horizontal inclination angle α3 of the upper box body three (103), and 10° ≤ α3 ≤ 15°. Multiple sets of sieve shaft assemblies (3) are arranged inside the housing, and the sieve shaft assemblies (3) are sealed with the housing through shaft end seals (303). The shaft end seal (303) includes two-stage seals: the primary seal is a felt seal (303a), and the secondary seal is a leather cup seal (303b).

2. The sectional roller screen with detachable side plates according to claim 1, characterized in that: Each set of sieve shaft assemblies (3) includes sieve plates (301), sieve shafts (302) and shaft end seals (303). The sieve plates (301) are parabolic sieve plates. The ends of the sieve shafts (302) are movably connected to the housing. The protective plate (115) protects the part of the sieve shaft (302) passing through the wall. Sieve plates (301) are installed on the sieve shafts (302). The sieve plates (301) on adjacent two sieve shafts (302) are arranged staggeredly to form a rolling sieve surface.

3. The sectional roller screen with detachable side plates according to claim 2, wherein: The cleaning device is installed on the inner wall of the segmented lower base (2). A set of cleaning devices (4) are installed directly below each set of sieve shaft assemblies (3). The cleaning device (4) includes a comb tooth support (402) fixedly connected to the inner wall of the segmented lower base (2) and comb teeth (401) fixed to the comb tooth support (402).

4. A sectional roller screen with detachable side plates according to claim 3, characterized in that: The interfaces between adjacent components of the outlet hopper (8), upper box body one (101), upper box body two (102), upper box body three (103), inlet hopper (7) and the segmented lower base (2) are connected by flange threaded connectors one (108); Safety guardrails (9) are welded on the upper box body one (101), upper box body two (102), upper box body three (103) and the outlet hopper (8); The interfaces between adjacent components of the lower base one (201), lower base two (202), lower base three (203) and the segmented upper box body (1), bypass device (6), outlet hopper (8) are connected by flange threaded connectors two (205); The bypass device (6) is connected to the outer side wall of the lower base three (203) through a fixed support (206); Drive device mounting bases (209) are installed on the lower base one (201), lower base two (202), and lower base three (203).

5. A sectional roller screen with detachable side plates according to claim 2, characterized in that: Upper half flanges (116) are installed on the lower parts of the outer walls on both sides of the detachable side plate one (104), detachable side plate two (105) and detachable side plate three (106). Lower half flanges (204) are installed on the upper parts of the outer walls on both sides of the lower base one (201), lower base two (202) and lower base three (203). The upper half flange (116) is adapted to the lower half flange (204), and the shaft end seal (303) is fixed on the outside of the structure formed by the upper half flange (116) and the lower half flange (204).

6. The sectional roller screen with detachable side plates according to claim 4, characterized in that: The drive device (5) is connected to the segmented lower base (2) through a drive device mounting base (209), and the end of the output shaft of the drive device (5) is connected to the end of the sieve shaft (302).

7. A sectional roller screen with detachable side plates according to claim 4, characterized in that: The bypass device (6) includes a three-way baffle (601), an asymmetric flow guide cone (602), an electric push rod (603) and an electric push rod limit device (604). The asymmetric flow guide cone (602) is installed at about one-third of the deviation from the center of the three-way baffle (601). The electric push rod (603) is installed on the fixed support (206). The bypass device (6) is connected to the segmented upper box body (1) and the segmented lower base (2) through flange threaded connectors one (108), connecting plates (109) and first threaded connectors (110).

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