Movable grate bar type drum screening machine
By installing movable screen strips on the drum screen and matching ring hammers to hit it, the problem of screening surface blockage during the screening of viscous materials is solved, which improves screening efficiency and reduces energy consumption.
Patent Information
- Application Number
- CN202420786468.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-16
AI Technical Summary
Viscous materials can easily cause blockage of the screen surface during screening in the drum screen, resulting in low screening efficiency and high energy consumption.
A movable screening strip type drum screening machine is designed. By installing movable screen strips on the drum screen and periodically knocking them with an ring hammer, the material prevents the screen strips from being applied to.
It effectively solves the problem of blockage of the screen surface during the screening of viscous materials in the drum screen, improves the screening efficiency and reduces energy consumption.
Smart Images
Figure CN222678670U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a movable screen bar type drum screening machine, belonging to the technical field of drum screening machines. Background Art
[0002] The drum screening machine is a new generation of self-cleaning screening equipment after the electric vibrating screen and the ordinary mesh drum screen produced by major domestic companies. It is widely used in the screening of various solid materials with a particle size of less than 300mm. It has many characteristics such as high screening efficiency, low noise, small dust, long service life, small maintenance and easy maintenance. Its screening capacity is 60 tons / hour to 1000 tons / hour.
[0003] At present, comprehensive utilization power stations (mainly circulating fluidized bed boilers) that mainly burn low-quality coal are rapidly emerging in China. However, fuels mainly composed of coal ore and coal slime are usually sticky, wet, dirty, and mixed. These sticky materials are easy to cause screen surface blockage during screening, resulting in low screening efficiency and high energy consumption. It is necessary to study and improve this. Utility Model Content
[0004] Based on the above, the utility model provides a movable screen bar type drum screening machine to overcome the deficiencies of the prior art.
[0005] The technical solution of the utility model is: a movable screen bar type drum screening machine, comprising:
[0006] The drum screen comprises an end flange, a limiting flange and movable screen bars, wherein the movable screen bars are installed between the end flanges, the diameter of the mounting hole on the end flange is larger than the shaft diameter of the end of the movable screen bar, the limiting flange is detachably installed on the end flange, and the diameter of the limiting hole on the limiting flange is smaller than the shaft diameter of the end of the movable screen bar;
[0007] The rapping mechanism comprises a driving shaft and a ring hammer, wherein the driving shaft is arranged close to the drum screen, the ring hammer is arranged on the driving shaft, the ring hammer is an eccentric wheel, and the ring hammer can strike the movable screen bars during the rotation process with the driving shaft.
[0008] In one example, the limiting flange is composed of a plurality of sheet flanges, a fixing hole is provided on the end flange, and each of the limiting flanges is fixed in the fixing hole by bolts.
[0009] In one example, two ends of the movable screen bar are provided with support shafts, the support shafts are installed in the limiting holes, and the aperture of the limiting holes is larger than the shaft diameter of the support shafts.
[0010] In one example, the end flange includes a front end flange, a rear end flange and several middle section flanges, the front and rear ends of the middle section flange are provided with flange plates, and the movable screen bars are installed between the front end flange and the middle section flange, the adjacent middle section flanges, and the middle section flange and the rear end flange.
[0011] In one example, the drum screen further includes a support ring and a feeding system, wherein the support ring is disposed in front of the front flange, the drum screen is tilted, and a feeding pipe of the feeding system extends into the front end of the drum screen.
[0012] The beneficial effects of the utility model are as follows: the utility model sets the fixed screen bars on the existing drum screen as movable screen bars, and cooperates with a ring hammer to perform periodic knocking to prevent the material from covering the screen bars, thereby effectively solving the problem that the current sticky material is easily blocked by the screen surface during screening in the drum screen, resulting in low screening efficiency and high energy consumption.
[0013] In addition, the position limiting flange in the utility model is composed of a plurality of sheet flanges, each of which is provided with a mounting hole, and the end flange is provided with a fixing hole, and each position limiting flange is fixed in the fixing hole by bolts. When a movable screen bar needs to be replaced, only the corresponding sheet flanges at both ends need to be removed without disassembling the entire position limiting flange. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is an overall schematic diagram of a movable screen bar type drum screening machine;
[0015] Figure 2 It is a schematic diagram of the middle section flange;
[0016] Figure 3 for Figure 2 AA section view in the figure;
[0017] Figure 4 It is a schematic diagram of the limit flange;
[0018] Figure 5 It is a schematic diagram of a sheet flange;
[0019] Figure 6 It is a cross-sectional view of the installation position of the movable screen bar, the middle section flange and the limit flange;
[0020] Description of reference numerals:
[0021] 1 Drum screen
[0022] 11 end flange, 12 limit flange, 13 movable screen bar, 14 support ring, 15 feeding system, 16 driving flange;
[0023] 111 front end flange, 112 rear end flange, 113 middle section flange, 114 mounting hole, 115 fixing hole;
[0024] 121 sheet flange, 122 limiting hole;
[0025] 131 axis;
[0026] 2. Rapping mechanism
[0027] 21 driving shaft, 22 ring hammer. DETAILED DESCRIPTION
[0028] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.
[0029] See also Figures 1 to 6 In this embodiment, a movable screen bar type drum screening machine includes a drum screen 1 and a vibration mechanism 2.
[0030] The drum screen 1 includes an end flange 11, a limiting flange 12 and movable screen bars 13. The end flange 11 includes a front end flange 111, a rear end flange 112 and a plurality of middle section flanges 113. Flange plates are provided at both the front and rear ends of the middle section flange 113. The movable screen bars 13 are installed between the front end flange 111 and the middle section flange 113, the adjacent middle section flanges 113, and the middle section flange 113 and the rear end flange 112. The aperture of the mounting hole 114 on the end flange 11 is larger than the shaft diameter of the end of the movable screen bar 13. The limiting flange 12 can be detachably installed on the end flange 11. The aperture of the limiting hole 122 on the limiting flange 12 is smaller than the shaft diameter of the end of the movable screen bar 13, so that the movable screen bar 13 can rotate or jump in the mounting hole 114 when the drum screen 1 rotates.
[0031] The drum screen 1 further includes a support ring 14 and a feeding system 15. The support ring 14 is arranged in front of the front flange 111. The support ring 14 is used to support the frame so that the drum screen 1 is tilted. The feeding pipe of the feeding system 15 extends into the front end of the drum screen 1, so that the material can be guided into the drum screen 1. It should be noted that the end flange 11 is also connected to the driving flange 16 through the fixed screen bar, and the driving flange 16 is used to connect with the transmission mechanism to realize the rotation of the drum screen 1.
[0032] Furthermore, to facilitate disassembly and installation, the limiting flange 12 is composed of a plurality of sheet flanges 121, each of which is provided with a limiting hole 122, and the end flange 11 is provided with a fixing hole 115, each limiting flange 12 is fixed in the fixing hole 115 by bolts, and after installation, the limiting hole 122 is aligned with the mounting hole 114. When a certain movable screen bar 13 needs to be replaced, only the corresponding sheet flanges 121 at both ends need to be removed without disassembling the entire limiting flange 12.
[0033] Furthermore, support shafts 131 are provided at both ends of the movable screen bar 13, and the support shafts 131 extend into the limiting holes 122, and the aperture of the limiting holes 122 is larger than the axial diameter of the support shafts 131. This structure can limit the axial movement of the movable screen bar 13 without limiting the radial runout or rotation of the movable screen bar 13.
[0034] The rapping mechanism 2 includes a driving shaft 21 and a hammer 22. The driving shaft 21 is arranged close to the drum screen 1. The driving shaft 21 is powered by a power mechanism to rotate. Multiple hammers 22 are installed on the driving shaft 21 at intervals. The hammer 22 is an eccentric wheel. The hammer 22 can strike the movable screen bar 13 during the rotation of the driving shaft 21.
[0035] The working principle of the above movable screen bar drum screening machine is as follows: when sticky materials (coal ore, coal slime) enter the drum screen 1, the movable screen bar 13 will also move (such as rotating or jumping) relative to the end flange 11 during the rotation of the drum screen 1, and the ring hammer 22 will periodically hit the movable screen bar 13, which can improve the vibration effect of the movable screen bar 13, and then the sticky materials attached to it can be screened. Compared with the prior art, the utility model sets the fixed screen bar on the existing drum screen 1 as the movable screen bar 13, and cooperates with the ring hammer 22 to periodically hit it to prevent the material from covering the screen bar, which effectively solves the problem that the current sticky material is easily blocked by the screen surface during the screening process of the drum screen 1, and there are low screening efficiency and high energy consumption.
[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A movable screen bar drum screening machine, characterized in that: include: A drum screen (1), comprising an end flange (11), a limiting flange (12) and movable screen bars (13), wherein the movable screen bars (13) are installed between the end flanges (11), the diameter of the mounting holes (114) on the end flanges (11) is larger than the shaft diameter of the ends of the movable screen bars (13), the limiting flanges (12) are detachably installed on the end flanges (11), and the diameter of the limiting holes (122) on the limiting flanges (12) is smaller than the shaft diameter of the ends of the movable screen bars (13); The rapping mechanism (2) comprises a driving shaft (21) and a hammer (22), wherein the driving shaft (21) is arranged close to the drum screen (1), and the hammer (22) is arranged on the driving shaft (21). The hammer (22) is an eccentric wheel, and the hammer (22) can strike the movable screen bars (13) when rotating with the driving shaft (21).
2. The movable screen bar drum screening machine according to claim 1, characterized in that: The limiting flange (12) is composed of a plurality of sheet-shaped flanges (121), and a fixing hole (115) is provided on the end flange (11), and each piece of the limiting flange (12) is fixed in the fixing hole (115) by means of bolts.
3. The movable screen bar drum screening machine according to claim 2, characterized in that: Support shafts (131) are provided at both ends of the movable screen bar (13); the support shafts (131) are installed in the limiting holes (122); and the diameter of the limiting holes (122) is larger than the diameter of the support shaft (131).
4. The movable screen bar drum screening machine according to claim 1, characterized in that: The end flange (11) comprises a front end flange (111), a rear end flange (112) and a plurality of middle section flanges (113); flange plates are provided at both the front and rear ends of the middle section flange (113); and the movable screen bars (13) are installed between the front end flange (111) and the middle section flange (113), between adjacent middle section flanges (113), and between the middle section flange (113) and the rear end flange (112).
5. The movable screen bar drum screening machine according to claim 4, characterized in that: The drum screen (1) further comprises a support ring (14) and a feed system (15); the support ring (14) is arranged at the front of the front flange (111); the drum screen (1) is arranged at an angle; and a feed pipe of the feed system (15) extends into the front end of the drum screen (1).