An adjustable sieve surface structure cross-type fine particle roller screen

Abstract

The present invention discloses a cross-type fine particle roller screen with adjustable screen surface structure, which comprises a cross-type fine particle roller screen body, a multi-hopper receiving box and a weighing and feeding device. The cross-type fine particle roller screen body includes a support base, a height adjustment device, a screen shaft translation device, a screen roller assembly and a drive assembly. The support base includes two symmetrically arranged support frames, and a plurality of stepwise arranged mounting seats are provided on the support frames. The height adjustment device is installed on the mounting seats and includes a height adjustment plate and a height adjustment screw component. In the present invention, by moving the height adjustment plate up and down on the height adjustment screw component, the up and down positions of all the screen roller assemblies can be adjusted, so as to adjust the cross-type fine particle roller screen surface, including integral screen surface structure, segmented screen surface structure, etc., to adapt to the screening operation under different feeding speeds and material characteristics environments. The screen shaft translation device can conveniently adjust the aperture of the moving screen holes, screen out materials with different particle diameters and prevent sticking and blocking of materials.

Description

Technical Field

[0001] The present invention relates to the technical field of screening equipment, and particularly relates to a cross-type fine-grained roller screen with an adjustable screen surface structure. Background Art

[0002] The cross-type fine-grained roller screen is a device suitable for deep dry screening of wet fine-grained materials, and is applied to industries such as thermal power plants, coal mines, coal preparation plants, etc., and can classify various loose materials. However, since the overall screen surface structure of the existing cross-type fine-grained roller screen is often fixedly installed on the support base and the screen surface structure cannot be adjusted, this results in that the cross-type fine-grained roller screen is only applicable to relatively stable working environments (the particle size composition and external water content of the materials are relatively stable). For example, the patent document (publication number: CN217369128U) discloses a cross-type roller screen, which adopts the design of the inclination angle of the integral screen surface structure, and can ensure a high screening efficiency under the condition of a small feeding amount, but is not applicable to the screening working condition with a large feeding amount. Another example is the patent document (publication number: CN213377661U) which discloses a cross-type roller screen and a cross-roller type impurity removal machine, which adopts a three-section screen surface structure design, has the characteristics of high screening efficiency, large processing capacity, and no vibration, but is not applicable to the screening working condition with a high water content. Summary of the Invention

[0003] The purpose of the present invention is to provide a cross-type fine-grained roller screen with an adjustable screen surface structure, which can be adjusted into different screen surface structure forms according to different complex working conditions, and is beneficial to the smooth progress of the screening operation.

[0004] To achieve the above purpose, a cross-type fine-grained roller screen with an adjustable screen surface structure of the present invention includes a cross-type fine-grained roller screen body, a multi-hopper receiving box, and a weighing and feeding device. The main body of the weighing and feeding device is located above the cross-type fine-grained roller screen body, and the multi-hopper receiving box is located at the bottom of the cross-type fine-grained roller screen body; wherein,

[0005] The cross-type fine-grained roller screen body includes a support base, a screen roller assembly, and a height adjustment device. The support base includes two symmetrically arranged support frames, the top of the support frame is arranged in a stepped manner, and an installation seat is installed on each step;

[0006] The screen roller assembly includes a screen shaft, a circular screen plate, a spacer sleeve, and a bearing seat; a plurality of the circular screen plates are installed on the screen shaft; the spacer sleeve is installed on the screen shaft and is located between two adjacent circular screen plates; the bearing seats are installed at both ends of the screen shaft;

[0007] The height adjustment device includes a height adjustment plate and a height adjustment screw assembly. The bearing seat is mounted on the height adjustment plate, and the height adjustment plate is adjusted in height by the height adjustment screw assembly mounted on the mounting seat. By adjusting the height of all the height adjustment plates, the axis lines of all the screen shafts on all the screen roller assemblies are located on the same screen surface, and the inclination angle of the screen surface is adjusted according to different working conditions. Or all the screen roller assemblies are divided into at least three groups, each group of screen roller assemblies is on the same screen surface, and the inclination angles of multiple screen surfaces increase gradually from low to high, and the inclination angles of each screen surface are adjusted according to different working conditions.

[0008] Further, the height adjustment device includes a height adjustment plate I and a height adjustment plate II. The height adjustment plate I is horizontally mounted on one of the support frames, and the height adjustment plate II is horizontally mounted on another support frame at the same step. The height adjustment screw assemblies are provided on both the height adjustment plate I and the height adjustment plate II. The height adjustment screw assembly is an adjustment screw I and an adjustment nut. The lower end of the adjustment screw I is arranged in the mounting hole on the mounting seat of the support frame and is connected by the nut. The upper end of the adjustment screw I is arranged in the through hole of the height adjustment plate I or the height adjustment plate II and is connected by the adjustment nut.

[0009] Further, the height adjustment device includes a height adjustment plate III. The height adjustment screw assembly is an adjustment screw II and an adjustment nut. The height adjustment plate III is a right-angle plate. The bearing seat is mounted on the vertical surface of the height adjustment plate III. The adjustment screw II is connected to both the mounting seat and the horizontal plane of the height adjustment plate III at the same time. The height of the bearing seat is adjusted by adjusting the height of the horizontal plane of the height adjustment plate III.

[0010] Further, a guide rail is arranged at the bottom between the two support frames. The multi-hopper receiving box is placed on the guide rail, and a bull's-eye bearing is arranged on the guide rail. The multi-hopper receiving box can slide on the guide rail.

[0011] Further, the cross-type fine particle roller screen body further includes a screen box. The screen box includes side plates, side sealing plates and a rear blanking plate. There are two side plates, which are symmetrically arranged. The side plates are connected to the support frames, and the side sealing plates are mounted on the outer sides of the side plates. Long slot holes that are symmetric left and right are provided on the side sealing plates for following the up and down adjustment of the screen shafts. The rear blanking plate is arranged at the rear end of the side plates and is connected to the two side plates.

[0012] Further, the screen shaft is an eccentric screen shaft, and the screen shaft is eccentric in the middle part.

[0013] Further, the circular sieve plate is a circular eccentric sieve plate, and through holes are provided on the circular sieve plate. A plurality of the circular sieve plates are installed on the sieve shaft through the through holes.

[0014] Further, a sieve shaft translation device is further included. The sieve shaft translation device is fixedly installed on the mounting seats at both ends of the sieve shaft. The sieve shaft translation device includes a translation mounting plate, translation slideways and a sliding oil cylinder. The translation slideways are two parallel slideway bodies, and slideway grooves are provided on the opposite inner sides. The height adjustment device is fixed on the upper surface of the translation mounting plate. The rod of the sliding oil cylinder is fixedly connected to the translation mounting plate to push the translation mounting plate to move in the slideways. A translation scale is provided on the upper surface of the slideway body for precisely adjusting the translation distance of the translation plate. The sieve shaft translation device is used for finely adjusting the distance between the sieve shafts.

[0015] Further, long groove-shaped adjustment holes are provided on the mounting seats. The lower end of the adjusting screw I is arranged in the long groove-shaped adjustment holes on the mounting seats and is connected by the nuts to adjust the distance between the sieve shafts.

[0016] Further, the weighing and feeding device includes a hopper bottom frame, a hopper guide frame, pressure sensors, a hopper and a chute. A support plate is horizontally arranged on the upper part of the hopper bottom frame, and a rectangular opening is provided in the middle of the support plate. The hopper guide frame is arranged above the hopper bottom frame, and two symmetrically arranged sensor seats are provided at the lower end of the hopper guide frame. There are two pressure sensors arranged on the sensor seats. The hopper is arranged in the hopper guide frame and is supported by the pressure sensors installed on the sensor seats. A material quantity control gate is provided at the lower end of the hopper. The chute is connected to the support plate of the hopper bottom frame and is connected to the material quantity control gate at the bottom of the hopper.

[0017] Advantages of the present invention:

[0018] (1) Height adjustment devices are arranged on each mounting seat, which can easily change the height of the sieve shaft to form a blanking sieve surface composed of the axis lines of all sieve shafts, including an integral sieve surface with different inclination angles, segmented sieve surfaces with various different angles, etc., so as to meet the screening requirements of different working conditions, different types of materials, different external water contents of materials and different particle diameters, and maximize the expansion of its usage scenarios;

[0019] (2) The sieve shaft is set as an eccentric shaft (or the circular sieve plate is set as an eccentric sieve plate), and "moving sieve holes" are formed between adjacent sieve plates and the sieve shaft. The sieve holes are always transparent during the screening process to complete the screening operation without sticking, blocking or jamming;

[0020] (3) By setting the sieve shaft translation device and using the long slot-shaped adjustment holes for the mounting seat, the aperture sizes of all dynamic sieve holes can be finely adjusted, or the aperture of the dynamic sieve holes can be grouped and finely adjusted in segments for the sieve shaft to meet the screening requirements for different materials and different particle sizes;

[0021] (4) The multi-hopper receiving box is provided with multiple boxes for receiving the materials smaller than the sieve hole size after screening, and it can be conveniently pulled out or sent to the bottom of the cross-type fine particle roller screen body through the bull's eye bearings on the guide rail;

[0022] (5) By changing the number of the draw plates cooperating with the bull's eye bearings, the discharge amount of the material quantity control gate can be quantitatively controlled. Brief Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the cross-type fine particle roller screen of the present invention;

[0024] Figure 2 is an embodiment of the height adjustment device of the present invention;

[0025] Figure 3 is another embodiment of the height adjustment device of the present invention;

[0026] Figure 4 is the schematic diagram of the formation of the dynamic sieve holes;

[0027] Figure 5 is the structural schematic diagram of the sieve shaft translation device;

[0028] Figure 6 is the structural schematic diagram of the multi-hopper receiving box of the present invention;

[0029] Figure 7 is Figure 1 the partial enlarged view at I in

[0030] Figure 8 is Figure 1 the partial enlarged view at II in

[0031] Figure 9 is the overall sieve surface structure formed by the adjusted cross-type fine particle roller screen;

[0032] Figure 10 is the segmented sieve surface structure formed by the adjusted cross-type fine particle roller screen;

[0033] In the figure, 1 is the cross-type fine particle roller screen body, 11 is the support base, 111 is the support frame, 1111 is the mounting seat, 1112 is the long slot-shaped adjustment hole, 112 is the height adjustment plate I, 113 is the height adjustment plate II, 114 is the height adjustment screw assembly, 1141 is the adjustment screw I, 1142 is the adjustment screw II, 115 is the intermediate connecting piece, 116 is the guide rail, 117 is the guide plate, 118 is the height adjustment plate III, 12 is the screen roller assembly, 121 is the screen shaft, 122 is the circular screen, 123 is the spacer sleeve, 124 is the bearing seat, 13 is the drive assembly, 14 is the screen box, 141 is the side plate, 142 is the side seal plate, 143 is the rear blanking plate, 2 is the multi-hopper receiving box, 3 is the weighing and feeding device, 31 is the hopper chassis, 32 is the hopper guide frame, 33 is the sensor seat, 34 is the pressure sensor, 35 is the hopper, 351 is the guide groove, 352 is the draw plate, 36 is the chute, 4 is the screen shaft translation device, 41 is the translation mounting plate, 42 is the translation slideway, 43 is the sliding oil cylinder, 44 is the translation scale, and K is the dynamic screen hole. Detailed implementation mode

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Embodiment

[0035] As Figure 1 shown, a cross-type fine particle roller screen with an adjustable screen surface structure includes a cross-type fine particle roller screen body 1, a multi-hopper receiving box 2, and a weighing and feeding device 3. The main body of the weighing and feeding device 3 is located above the rear of the cross-type fine particle roller screen body 1, and the multi-hopper receiving box 2 is located at the bottom of the cross-type fine particle roller screen body 1. Specifically, as Figure 2 shown, the cross-type fine particle roller screen body 1 includes a support base 11, a screen roller assembly 12, and a height adjustment device. The support base 11 is composed of two symmetrically arranged support frames 111 with a space left in the middle. The tops of the support frames 111 are arranged in a stepped manner, and a mounting seat 1111 is installed on each step. The front and rear ends of the bottoms of the two support frames 111 are connected by an intermediate connecting piece 115 to make the entire support base 11 more stable. As Figure 1 shown, the cross-type fine particle roller screen body 1 further includes a screen box 14. The screen box 14 includes side plates 141, side seal plates 142, and a rear blanking plate 143. There are two side plates 141, which are symmetrically arranged. The side plates 141 are connected to the support frames 111, and the side seal plates 142 are installed on the outer sides of the side plates 141; symmetric long slot holes are provided on the side seal plates 142 for following the up and down adjustment of the screen shaft 124; the rear blanking plate 143 is arranged at the rear end of the side plates 141 and is connected to the two side plates 141. The screen box 14 is provided to prevent large pieces of materials from splashing outside during the operation of the cross-type fine particle roller screen.

[0036] As Figure 3As shown, the screen roller assembly 12 includes a screen shaft 121, circular screen plates 122, spacer sleeves 123, and bearing seats 124. A plurality of circular screen plates 122 are mounted on the screen shaft 121. The spacer sleeves 123 are mounted on the screen shaft 121 and are arranged between two adjacent circular screen plates 122. The spacer sleeves 123 are used to limit the circular screen plates 122 to prevent them from moving left and right. The bearing seats 124 are mounted at both ends of the screen shaft 121.

[0037] In this embodiment, the screen shaft 121 is an eccentric screen shaft, and the middle part of the screen shaft 121 is eccentric. Of course, the circular screen plates 122 can also be set as circular eccentric screen plates, and the screen shaft 121 does not need to be eccentric. The circular screen plates 122 are provided with through holes, and a plurality of circular screen plates 122 are mounted on the screen shaft 121 through the through holes. As Figure 4 shown, taking the eccentricity of the circular screen plates 122 as an example, after all the screen shafts 121 rotate, the circular screen plates 122 also rotate accordingly. Sieve holes are formed between adjacent circular screen plates 122 and the screen shaft 121. Due to the eccentric setting of the circular screen plates 122, the sizes of the sieve holes will change periodically, that is, large holes - small holes - large holes - small holes will appear in a cycle, thus forming dynamic sieve holes K. When the material comes down from the weighing and feeding device 3 and rolls forward, it is continuously stratified during the process. The small particles move downward, and the large particles roll forward. The small particles come into contact with the moving sieve holes for a long time and are forced to pass through the sieve under the frictional shearing action of the cross-type fine particle roller screen plates. The large particles continuously impact and break up the agglomerated wet particles and automatically clean the small particles adhering between the screen plates, achieving the effect of "self-cleaning". During the screening process of the cross-type fine particle roller screen, the sieve holes are always permeable, completing the screening operation of "non-sticking, non-blocking, and non-jamming". In addition, due to the eccentric setting of the circular screen plates 122, the entire cross-type fine particle roller screen surface will form a small-amplitude wavy state during operation, which is beneficial to preventing large pieces of material from staying or getting stuck on the screen surface.

[0038] The height adjustment device in this embodiment includes a height adjustment plate I 112, a height adjustment plate II 113, and a height adjustment screw assembly 114. The height adjustment plate I 112 is horizontally mounted on a support frame 111, and the height adjustment plate II 113 is horizontally mounted on another support frame 111 of the same step; height adjustment screw assemblies 114 are provided on both the height adjustment plate I 112 and the height adjustment plate II 113. The height adjustment screw assembly 114 includes a screw and a nut. The lower end of the screw is arranged in the mounting hole on the mounting seat 1111 of the support frame 111 and is connected by a nut. The upper end of the screw is arranged in the through hole of the height adjustment plate I 112 or the height adjustment plate II 113 and is connected by a nut. The outside of the height adjustment plate I 122 is connected to the drive assembly 13.

[0039] By adjusting the heights of all the height adjustment plates, different screen surface structural forms can be formed for this device, that is, as Figure 9The shown integral screen surface structure form enables the axis lines of all the screen shafts 121 on all the screen roller assemblies 12 to be located on the same screen surface, and the inclination angle of the screen surface is adjusted according to different working conditions. As Figure 10 The shown sectional screen surface structure form means that all the screen roller assemblies 12 are divided into three groups, and each group of screen roller assemblies 12 is on the same screen surface. The inclination angles of the multi-group screen surfaces increase gradually from low to high. According to different working conditions and materials, the inclination angle of each section of the screen surface can be changed. The sectional screen surface structure is widely applied. The design of the sectional screen surface inclination angle is adopted, and this design utilizes the principle of equal-thickness screening: when the material flows into the screen surface through the feed inlet, due to the large inclination angle of the screen surface at the feed end, the material flow rate is relatively fast, and the particles entering this section of the screen surface will be quickly stratified. The inclination angle of the screen surface at the discharge end is small, and the residence time of the material is relatively long, so that the particles can evenly cover the screen surface. When in use, in order to obtain a higher screening efficiency, the inclination angle of the overall screen surface structure of the cross-type fine particle roller screen can be appropriately reduced, so that the residence time of the material on the screen surface is long, which is beneficial to the material passing through the screen. A larger screen surface inclination angle will increase the processing capacity of the cross-type fine particle roller screen and is beneficial to screening materials with a high external water content. Adjusting the cross-type fine particle roller screen to a sectional screen surface structure can obtain a relatively uniform material layer distribution and solve the problems of easy blockage at the feed end and low utilization rate of the screen surface at the discharge end.

[0040] As Figure 5As shown in the figure, the cross-type fine-grained roller screen further includes a screen shaft translation device, which is fixedly installed on the mounting seats 1111 at both ends of the screen shaft 121, that is, the screen shaft translation device is located between the height adjustment device and the mounting seat 1111, and is provided below both ends of each screen shaft 121. The screen shaft translation device includes a translation mounting plate 41, a translation slideway 42 and a sliding oil cylinder 43. The translation slideway 42 is composed of two parallel slideway bodies, and slideway grooves are provided on the opposite inner sides for placing both sides of the translation mounting plate 41. There is a certain working distance between the bottom surface of the translation mounting plate 121 and the upper surface of the mounting seat 1111. The height adjustment device is installed on the upper surface of the translation mounting plate 41, and a plurality of mounting holes are provided on the translation mounting plate 41 for installing the screw adjusting assembly. The rod of the sliding oil cylinder 43 is fixedly connected to the translation mounting plate 41 to push the translation mounting plate 41 to move in the slideway 42. A translation scale 44 is provided on the upper surface of the slideway body for precisely adjusting the translation distance of the translation plate. The screen shaft translation device is used to finely adjust the spacing between all the screen shafts 121 on the cross-type fine-grained roller screen. The dynamic screen holes K are generated by the eccentricity of the screen shaft 121 or the circular screen plate 122. After the overall height adjustment is performed on the height adjustment device on the cross-type fine-grained roller screen to form an integral screen surface structure or a segmented screen surface structure, the maximum diameter and the minimum diameter of the dynamic holes have been determined. During the use of the cross-type fine-grained roller screen, sometimes due to the high viscosity of the material or when screening materials of a certain particle size, the above-mentioned determined dynamic screen holes cannot meet the use requirements. By setting the screen shaft translation device and controlling all the sliding oil cylinders on the cross-type fine-grained roller screen uniformly through hydraulic control, making them move a certain distance to change the spacing between the screen shafts 121, so that the aperture size of the dynamic screen holes K is changed. When the material is too sticky, by increasing the spacing between the screen shafts 121, the problem of material blocking on the screen surface can be solved; by adjusting the aperture size of the dynamic screen holes K, the material with the required particle size can be obtained, thus broadening the use flexibility and screening convenience of the cross-type fine-grained roller screen. Since the adjustment of the aperture of the dynamic screen holes K is a fine adjustment, therefore, by observing the scale 44 on the slideway body, the control of the slideway oil cylinder can be coordinated to make the adjustment of the dynamic screen holes K more precise.

[0041] Of course, the round holes of the mounting seat 1111 can also be changed to long-slot-shaped adjustment holes 1112, as Figure 2 shown. Each long-slot-shaped adjustment hole 1112 is provided with two adjustment screws 1141. In this way, by moving the position of the adjustment screws 1141 in the long-slot-shaped adjustment holes 1112, the distance from the top of the circular screen plate 122 to the adjacent screen shaft 121 can be controlled, so as to realize the fine adjustment of the size of the dynamic screen holes K.

[0042] As Figure 6As shown in the figure, a guide rail 116 is provided at the bottom between two support frames 111. The multi-hopper receiving box 2 is placed on the guide rail 116, and a bull's-eye bearing is provided on the guide rail 116. The multi-hopper receiving box 2 can be easily taken out from the cross-type fine-grained roller screen body 1.

[0043] As Figure 1 , Figure 7 and Figure 8 shown in the figure, the weighing and feeding device 3 includes a hopper chassis 31, a hopper guide frame 32, a pressure sensor 34, a hopper 35 and a chute 36. A rectangular groove is provided in the middle of the hopper chassis 31; the hopper guide frame 32 is arranged above the hopper chassis 31, and two symmetrically arranged sensor seats 33 are provided at the lower end of the hopper guide frame 32; there are two pressure sensors 34, which are arranged on the sensor seats 33; the hopper 35 is arranged in the hopper guide frame 32 and is supported by the pressure sensors 34 installed on the sensor seats 33. A material quantity control gate is provided at the lower end of the hopper 35. The chute 36 is connected to the hopper chassis 31 and is connected to the material quantity control gate at the bottom of the hopper 35.

[0044] As Figure 8 shown in the figure, a guide groove 351 is provided at the bottom of the hopper 35. The guide groove 351 is equidistantly provided with multiple through holes, and the bull's-eye bearing is arranged in the through holes of the guide groove 351. A draw plate 352 is provided at the upper end of the guide rail 116, and the draw plate 352 is provided with through holes distributed at the same spacing as the guide groove 351. Bull's-eye bearings are provided at the upper part of the hopper guide frame 32. The bull's-eye bearings are equidistantly staggered and are in point contact with the hopper 35. Embodiment

[0045] The height adjustment device in this embodiment is different from that in Embodiment 1. As Figure 3 shown in the figure, the height adjustment device includes a height adjustment plate III 118 and an adjustment screw 119. The height adjustment plate III 118 is a right-angled plate. The bearing seat 124 is installed on the vertical surface of the height adjustment plate. The adjustment screw 119 is simultaneously connected to the mounting seat 1111 and the horizontal plane of the height adjustment plate. The height of the bearing seat 124 is adjusted by adjusting the height of the horizontal plane of the height adjustment plate III 118 through the adjustment screw 119. A guide plate 117 is provided behind the vertical surface of the height adjustment plate III 118. The guide plate is provided with a long slot hole, so that the height adjustment plate III 18 can move up and down on the guide plate 117 through bolt connection.

[0046] The height adjustment device of the present invention has a simple structure and is easy to operate. Since the screen roller assembly 12 is installed on the height adjustment device, the inclination angle of the entire screen surface can be easily adjusted by turning the adjustment nut, forming an integral screen surface structure or a segmented screen surface structure to adapt to different working conditions.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. All various changes that can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention are within the scope of protection of the claims of the present invention.

Claims

1. A cross-type fine-grained roller screen with adjustable screen surface structure, characterized in that, It includes a cross-type fine-grained roller screen body (1), a multi-hopper receiving box (2) and a weighing and feeding device (3). The main body of the weighing and feeding device (3) is located above the cross-type fine-grained roller screen body (1), and the multi-hopper receiving box (2) is located at the bottom of the cross-type fine-grained roller screen body (1); wherein, The cross-type fine-grained roller screen body (1) includes a support base (11), a screen roller assembly (12) and a height adjustment device. The support base (11) includes two symmetrically arranged support frames (111). The top of the support frame (111) is arranged in a stepped manner, and a mounting seat (1111) is installed on each step; The screen roller assembly (12) includes a screen shaft (121), a circular screen (122), a spacer sleeve (123) and a bearing seat (124); a plurality of the circular screens (122) are installed on the screen shaft (121); the spacer sleeve (123) is installed on the screen shaft (121) and is located between two adjacent circular screens (122); the bearing seat (124) is installed at both ends of the screen shaft (121); The height adjustment device includes a height adjustment plate and a height adjustment screw component (114). The bearing seat (124) is installed on the height adjustment plate. The height adjustment plate is adjusted in height by the height adjustment screw component (114) installed on the mounting seat (1111). By adjusting the height of all the height adjustment plates, the axis lines of all the screen shafts (121) on all the screen roller assemblies (12) are located on the same screen surface, and the inclination angle of the screen surface, that is, the angle between the screen surface and the horizontal direction, is adjusted according to different working conditions; or all the screen roller assemblies (12) are divided into at least three groups. Each group of screen roller assemblies (12) is on the same screen surface. The inclination angles of multiple screen surfaces increase step by step from low to high, and the inclination angles of each screen surface are adjusted according to different working conditions.

2. The cross-type fine particle roller screen with adjustable sieve surface structure according to claim 1, wherein, The height adjustment device includes a height adjustment plate I (112) and a height adjustment plate II (113). The height adjustment plate I (112) is horizontally installed on one of the support frames (111), and the height adjustment plate II (113) is horizontally installed on the other support frame (111) on the same step; the height adjustment screw component (114) is provided on both the height adjustment plate I (112) and the height adjustment plate II (113). The height adjustment screw component (114) is an adjustment screw I (1141) and an adjustment nut. The lower end of the adjustment screw I (1141) is arranged in the mounting hole on the mounting seat (1111) of the support frame (111) and is connected by the nut. The upper end of the adjustment screw I (1141) is arranged in the through hole of the height adjustment plate I (112) or the height adjustment plate II (113) and is connected by an adjustment nut.

3. The cross-type fine-grained roller screen with adjustable sieve surface structure according to claim 1, wherein The height adjustment device includes a height adjustment plate III (118). The height adjustment screw assembly is an adjustment screw II (1142) and an adjustment nut. The height adjustment plate III (118) is a right-angle plate. The bearing seat (124) is installed on the vertical surface of the height adjustment plate III (118). The adjustment screw II (1142) is connected to both the mounting seat (1111) and the horizontal plane of the height adjustment plate III (118). The height of the bearing seat (124) is adjusted by adjusting the height of the horizontal plane of the height adjustment plate III (118).

4. The cross-type fine particle roller screen with adjustable sieve surface structure according to claim 1, characterized in that, A guide rail (116) is provided at the bottom between the two support frames (111). The multi-hopper receiving box (2) is placed on the guide rail (116). A bull's-eye bearing is provided on the guide rail (116). The multi-hopper receiving box (2) can slide on the guide rail (116).

5. The cross-type fine particle roller screen with adjustable screen surface structure according to claim 1, characterized in that, The cross-type fine-grained roller screen body (1) further includes a screen box (14). The screen box (14) includes side plates (141), side sealing plates (142), and a rear blanking plate (143). There are two side plates (141) which are symmetrically arranged. The side plates (141) are connected to the support frames (111). The side sealing plates (142) are installed on the outer sides of the side plates (141). Long slot holes which are symmetric left and right are provided on the side sealing plates (142) for following the up and down adjustment of the screen shafts (121). The rear blanking plate (143) is provided at the rear end of the side plates (141) and is connected to the two side plates (141).

6. The cross-type fine particle roller screen with adjustable screen surface structure according to claim 2, wherein The screen shaft (121) is an eccentric screen shaft and is eccentric in the middle part.

7. The cross-type fine particle roller screen with adjustable screen surface structure according to claim 2, characterized in that The circular screen plate (122) is a circular eccentric screen plate. Through holes are provided on the circular screen plate (122). A plurality of circular screen plates (122) are installed on the screen shaft (121) through the through holes.

8. The cross-type fine particle roller screen with adjustable screen surface structure according to claim 6 or 7, characterized in that, It further includes a screen shaft translation device. The screen shaft translation device is fixedly installed on the mounting seats (1111) at both ends of the screen shaft (121). The screen shaft translation device includes a translation mounting plate (41), translation slide ways (42), and a sliding oil cylinder (43). The translation slide ways (42) are two parallel slide way bodies, and slide way grooves are provided on the opposite inner sides. The height adjustment device is fixed on the upper surface of the translation mounting plate (41). The cylinder rod of the sliding oil cylinder (43) is fixedly connected to the translation mounting plate (41) to push the translation mounting plate (41) to move in the slide ways (42). A translation scale (44) is provided on the upper surface of the slide way body for precisely adjusting the translation distance of the translation plate. The screen shaft translation device is used for finely adjusting the distance between the screen shafts (121).

9. The cross-type fine particle roller screen with adjustable screen surface structure according to claim 6 or 7, characterized in that, Long slot-shaped adjustment holes (1112) are provided on the mounting seats (1111). The lower end of the adjustment screw I (1141) is arranged in the long slot-shaped adjustment holes (1112) on the mounting seats (1111) and is connected by the nuts to adjust the distance between the screen shafts (121).

10. The cross-type fine-grained roller screen with adjustable screen surface structure according to claim 1, characterized in that, The weighing and feeding device (3) includes a hopper chassis (31), a hopper guiding frame (32), pressure sensors (34), a hopper (35) and a chute (36). A support plate is horizontally arranged on the upper part of the hopper chassis (31), and a rectangular opening is arranged in the middle of the support plate; the hopper guiding frame (32) is arranged above the hopper chassis (31), and two symmetrically arranged sensor seats (33) are arranged at the lower end of the hopper guiding frame (32); there are two pressure sensors (34), which are arranged on the sensor seats (33); the hopper (35) is arranged in the hopper guiding frame (32) and is supported by the pressure sensors (34) installed on the sensor seats (33). A material quantity control gate is arranged at the lower end of the hopper (35); the chute (36) is connected to the support plate of the hopper chassis (31) and is connected to the material quantity control gate at the bottom of the hopper (35).

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