CN109277284B - Drum screen buffer rib and drum screen extension - Google Patents
Drum screen buffer rib and drum screen extension Download PDFInfo
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- CN109277284B CN109277284B CN201811490758.2A CN201811490758A CN109277284B CN 109277284 B CN109277284 B CN 109277284B CN 201811490758 A CN201811490758 A CN 201811490758A CN 109277284 B CN109277284 B CN 109277284B
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- side wall
- buffer
- buffer rib
- drum
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- 239000000463 material Substances 0.000 claims abstract description 82
- 238000012216 screening Methods 0.000 claims abstract description 47
- 230000007704 transition Effects 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 239000002893 slag Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000007790 scraping Methods 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4645—Screening surfaces built up of modular elements
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a drum screen buffer rib and a drum screen, and belongs to the field of material screening equipment. The buffer rib comprises a bottom surface which is connected with the inner side wall of the screen and a first side surface which is connected with the bottom surface, the first side surface is opposite to the feeding end of the screen and forms a certain included angle with the inner side wall of the screen, the buffer rib is uniformly distributed on the inner side wall of the screen, the longitudinal extension direction of the buffer rib is at a certain inclination angle relative to the longitudinal central axis of the screen, and finally, the buffer rib is uniformly distributed in the screen in a circumferential spiral connection mode. The invention can stir and push materials, effectively improves the working area of the screen of the drum screening machine, and greatly reduces the blocking rate of the screen, thereby indirectly increasing the screening amount of the drum screening machine and improving the working efficiency.
Description
Technical Field
The invention belongs to the field of material screening equipment, and particularly relates to a roller screen buffer rib and a roller screen.
Background
The roller screening machine is common equipment in classified screening operation of medium and fine crushing materials and particles, the sorting precision is improved by controlling the sorting of the materials according to the particle size of the particles, and the roller screening machine can be used in various fields of chemical industry, fertilizer, environmental protection, feed, metallurgy and the like, and has extremely wide application range. In the application of medium and fine crushing material conveying, the application of the rotary screen can effectively remove foreign matters larger than the size of the screen holes, so that the conveyed material is purified as a production raw material. The screening amount of the drum screen is an important index for measuring the working efficiency and ensuring the normal work, so that the screening amount of the drum screen must be increased in order to ensure and even improve the working efficiency.
Generally, the screening amount of a trommel screen is related to the structure of a screen hole, a screen drum, etc., the inclination state of a screen body and a ground plane, the rotation speed of the trommel screen, etc. Thus, there are mainly two conventional solutions: the mesh number size of the screen cloth is adjusted, and the rotating speed and the inclination angle of the rotary screen are adjusted. The screen holes of the drum screen directly influence the effective area of the screen, the larger the screen holes on the unit screen surface are, the larger the effective area of the screen is, the larger the probability that materials penetrate the screen holes is, so that the output capacity and the screening efficiency are higher; the screen body of the roller screen grader is inclined with the ground plane, so that the reasonable inclination design can effectively control the flow speed of materials on the screen surface, and the screening efficiency of the roller screen is improved. For example, chinese patent application number: CN200910075488.3, filing date: 2009.09.18 discloses a movable drum screen, which comprises a supporting frame, a drum screen and a transmission device fixedly connected to one end of the drum screen, wherein a supporting wheel is arranged on the upper part of the supporting frame. However, in the working process of a common rotary screen, the area of a screen surface participating in the working is not stable; in addition, the water content of the material is required to be lower than 10%. When the humidity of the materials to be screened is too high, the viscosity of the screened materials is increased, the phenomenon that the materials are stuck on the screen surface is easily generated, and the screening effect is affected.
Such as blast furnace slag, which is a product obtained by rapidly cooling waste, blast furnace slag, discharged from a blast furnace in the process of smelting pig iron, in water in a hot-melt state, and thus has a water content of more than 25%. The main components of the blast furnace slag are CaO and SiO 2、Al2O3, the blast furnace slag has potential hydraulic gelation performance, and can be used as a high-quality cement raw material under the action of the excitants such as cement clinker, lime, gypsum and the like. Before the blast furnace slag is used as the production raw material, the blast furnace slag must be screened to remove the materials with the size larger than the mesh size, so as to ensure the size and purity of the raw material. And because the blast furnace granulated slag has high water content and high humidity, adhesion among materials is more likely to occur in the screening process, and phenomena such as pasting of the materials and the screen mesh block the screen holes, thereby further reducing the participation working area of the screen mesh, leading to low screening quantity and screening efficiency, being difficult to meet the conveying requirement in the production process and influencing the normal work, therefore, frequent manual or mechanical cleaning is required in the use process so as to keep the smoothness of the screen holes and ensure the screening quantity. Such as chinese invention patent, application number: CN201410238556.4, filing date: 2014.05.30 discloses a self-cleaning vibrating drum screen with an adjustable dip angle, which mainly comprises: an outer scraping plate and an upper shield and a lower shield which contain the roller and have a small amount of clearance with the free end of the outer scraping plate are arranged on the peripheral surface of the roller. Two friction rings at two ends of the drum screen are arranged on two pairs of riding wheels, two riding wheel shafts at one side of the drum are respectively connected with the same speed reducer and the speed regulating motor through a coupler and a transmission shaft, and an inner scraping plate mechanism is arranged on the drum. The rotary screen disclosed by the invention can be used for vibration cleaning or vibration screening in the working process, and is matched with real-time cleaning of the inner scraping plates and the outer scraping plates, so that the cleaning state of the rotary screen can be always kept, the blocking of screen holes is effectively prevented, and the screening efficiency is high. But still has the problems of high energy consumption and high production cost. Moreover, in some work situations where the working parameters of the trommel are defined, the screening amount is difficult to meet the conveying requirement in the production process.
In summary, the method has practical significance for solving the problems of low screening amount, low screening efficiency, difficulty in meeting the conveying requirement in the production process and the like caused by the phenomena of material adhesion, material and screen pasting and the like of materials with large water content or large viscosity such as blast furnace slag and the like in the screening process.
Disclosure of Invention
1. Problems to be solved
When sieving materials with large water content or high viscosity, aiming at the problems of blocking sieve holes, small working area of a sieve drum net surface, low material sieving amount, high production cost and high energy consumption caused by adhesion of biological materials and pasting of the materials and the sieve screen in the sieving process in the prior art, the invention provides a buffer rib of a roller sieve and a roller sieving machine, which can prevent the adhesion of materials as much as possible under the condition that various working parameters of the roller sieving machine are unchanged; the sticking of materials on the screen surface is reduced, so that the screening amount is improved, and the working efficiency of the rotary screen is increased; in addition, the load of the engine can be effectively reduced, and the purposes of energy conservation and emission reduction are achieved.
2. Technical proposal
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the buffer rib of the rotary screen is arranged on the inner side wall of the screen mesh of the rotary screen and comprises a bottom and a side wall connected with the bottom;
The bottom is connected with the inner side wall of the screen in a matching way;
The side walls comprise first side walls and second side walls, the first side walls are connected with the second side walls to form a ridge beam part, and the ridge beam part is streamline in the length direction of the buffer rib;
The first side wall faces the feeding end of the screen, and forms an included angle alpha with the inner side wall of the screen, and the included angle alpha is 0-90 degrees.
Preferably, the buffer rib comprises a front end and a rear end; the front end faces the feeding end of the screen, and the rear end faces the discharging end of the screen; the relative height delta H 1 between the front end and the bottom is smaller than the relative height delta H 2 between the rear end and the bottom;
Preferably, the length of the buffer rib is one tenth to one fourth of the circumference of the screen, and the relative height of the rear end and the bottom is two delta H 2 which is one tenth to one seventh of the diameter of the screen.
Preferably, the maximum width of the bottom of the buffer rib is one W 1 which is larger than the maximum width of the first side wall by two W 2.
Preferably, the first connecting part of the first side wall of the buffer rib and the inner side wall of the screen and the second connecting part of the second side wall and the inner side wall of the screen are in arc transition.
Preferably, the buffer rib can be directly welded on the inner side wall of the screen or detachably fixed on the inner side wall of the screen.
Preferably, the buffer rib is made of wear-resistant materials, has a rough surface and is hollow.
The roller screening machine comprises a screen, wherein the buffer ribs are uniformly arranged on the inner side wall of the screen.
Preferably, the buffer ribs are uniformly distributed on the inner side wall of the screen, are circumferentially distributed along the inner side wall of the screen and are circumferentially spiral, the distribution pitch P is 200-400 mm, and the spiral angle beta is larger than 0 degrees and smaller than 90 degrees; the buffer ribs are longitudinally staggered along the inner side wall of the screen.
Preferably, the inner side wall of the screen is coated with a layer of ultra-high molecular polyethylene membrane, and the molecular weight is higher than 300 ten thousand; the screen mesh is obliquely arranged so as to have a high end and a low end; the screen feeding end is positioned at the high end; the discharging end of the screen is positioned at the lower end.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) The buffer ribs of the drum screen provided by the invention are circumferentially distributed along the circumferential direction of the inner side wall of the screen, so that a spiral surface channel is provided for materials, the materials can be prevented from directly impacting to a coarse discharge hole, the screening path of the materials can be prolonged in a limited space, the motion guiding and the material conveying can be realized, the screening efficiency is improved, and meanwhile, the working efficiency is not reduced;
The buffer ribs are not integrally and spirally distributed on the inner side wall of the screen mesh, are arranged at intervals and are uniformly distributed, so that when materials enter the drum screen for screening, the buffer ribs play a role in stirring the materials, the bulk materials are scattered, adhesion aggregation among the materials is reduced, and the screening yield of the materials is improved;
The buffer ribs are staggered longitudinally along the inner side wall of the screen, so that a cross composite stirring effect can be achieved on materials, stirring shearing force is increased, stirring time is prolonged, the materials fully circulate, stirring effect is improved to the greatest extent, the materials are scattered, and adhesion agglomeration among the materials is reduced;
the ridge beam part of the buffer rib is streamline in the length direction, no reaction dead angle exists in the screening process, and the shearing resistance is small, so that the load of the rotary screen engine is small, and the energy conservation and the emission reduction are realized; the height of the ridge beam part gradually rises from the front end to the rear end, incremental shearing force and a material conveying channel are formed, the best stirring effect and material conveying pushing effect are realized under the condition that the use of buffer rib preparation materials is reduced as much as possible, the screening amount is further increased, and the working efficiency is improved;
The surface of the buffer rib is rough, an included angle a smaller than 90 degrees is formed between the first side wall facing the feeding end of the screen and the inner side wall of the screen, after the material enters the screen, the space formed by the included angle a facing the impact direction of the material is stored with the material, so that the working state of the material feeding abrasive can be formed, and the abrasion to the buffer rib is reduced; then, part of the materials can be brought to the upper part of the screen under the combined action of centrifugal force and buffer ribs, so that the screen surface above the screen also participates in screening work, and the working area of the screen is increased to the greatest extent; meanwhile, part of the non-screened materials drop to other buffer ribs or screens which are arranged in a crossed and staggered way from the buffer ribs at the upper part of the screen, so that the materials are not only axially circulated but also radially rolled, a rolling, jumping and beating impact movement process of the materials is formed, the possibility of pasting of the materials on the screen surface is reduced to the greatest extent, and the screen is prevented from being blocked.
(2) The length of each single buffer rib is only one tenth to one fourth of the circumference of the screen, and the height is one tenth to one seventh of the diameter of the screen, so that the buffer ribs are convenient to install and use, save materials and reduce the use cost.
(3) According to the drum screen buffer rib provided by the invention, the width of the bottom connected with the inner side wall of the screen is larger than the maximum width of the first side wall, the widened bottom area can increase the connection strength of the buffer rib and the screen, and the impact resistance is stronger; and the buffer rib is made of wear-resistant materials, so that the durability is enhanced.
(4) The buffer rib provided by the invention has the advantages that the buffer rib and the screen are in arc transition, compared with the buffer rib with the screen with the obvious edge angle at the joint, the buffer rib has the advantages of preventing materials from accumulating and generating aggregation dead angles, and preventing materials from accumulating and pasting in the space of an included angle a formed by the buffer rib and the screen.
(5) The buffer rib of the drum screen provided by the invention can be directly welded on the inner side wall of the screen mesh or detachably fixed on the inner side wall of the screen mesh by utilizing the nut bolts according to actual conditions, so that the buffer rib is convenient for later replacement and maintenance.
(6) The drum screening machine provided by the invention has the advantages of stirring and screening effects, capability of preventing materials from adhering and agglomerating, large foreign matters scattering, large screen work area, difficulty in blocking screen holes and large screening amount, simple structure, reasonable design and easiness in manufacturing.
Drawings
FIG. 1 is a schematic partial cross-sectional view of a buffer bar mounted to the inside wall of a trommel screen;
FIG. 2 is a front view of a buffer bar;
FIG. 3 is a schematic view of the distribution of the buffer ribs in the screen;
FIG. 4 is a schematic view of a buffer bar removably mounted on a screen;
FIG. 5 is a schematic view of a drum screen provided by the present invention;
In the figure: 1. buffering the ribs; 110. a ridge beam portion; 111. a front end; 112. a rear end; 120. a bottom; 130. a first sidewall; 131. a first connecting part; 140. a second sidewall; 141. a second joint; 2. a screen; 210. the inner side wall of the screen; 220. a screen feed end; 230. a screen discharging end; 3. a frame; 4. a screen housing; 410. a screen lower discharge port; 420. a feed inlet; 430. a coarse material discharge port; 5. a center shaft; 6. a power plant; alpha and an included angle; beta, helix angle; p, screw pitch; Δh 1, relative height one; Δh 2, relative height two; w 1, maximum width I; w 2, maximum width two.
Detailed Description
Referring to fig. 1 and 2, the buffer bar 1 is mounted on a screen inner sidewall 210 of the drum screen, and is provided with a bottom 120, a first sidewall 130 and a second sidewall 140, wherein the first sidewall 130 and the second sidewall 140 are connected to form a streamline ridge beam portion 110 along the length direction of the buffer bar 1; as shown in fig. 1, the first side wall 130 faces the screen feeding end 220 and forms an included angle a with the screen inner side wall 210, and the included angle a is 0 to 90 °.
Referring to fig. 5, a drum screening machine includes a frame 3, a screen 2, a screen housing 4, a center shaft 5 parallel to a longitudinal center axis of the screen, and a power device 6 for driving the center shaft to rotate; the screen shell 4 is fixedly arranged on the frame 3, the lower part is provided with an undersize discharge port 410, and two ends of the screen shell are respectively provided with a feed port 420 and a coarse material discharge port 430; the screen 2 provided with the buffer rib 1 on the inner side wall 210 is positioned in the middle of the screen shell 4, and two ends of the center shaft 5 are movably connected to the frame 3 through bearing seats and drive the screen 2 to synchronously rotate by taking the center shaft 5 as a shaft.
As shown in fig. 3, the buffer ribs 1 are uniformly distributed on the inner side wall 210 of the screen, are circumferentially spirally distributed along the inner side wall 210 of the screen, and are longitudinally staggered along the inner side wall 210 of the screen.
The working principle of the drum screen buffer rib in the drum screen machine in the embodiment is as follows: starting the roller screening machine, synchronously rotating the screen 2 along with the central shaft 5, throwing materials (blast furnace granulated slag with extremely high moisture content) into the screen 2 from the feed inlet 420, impacting the materials into a material buffering space formed by the first side wall 130 of the uniformly distributed buffering ribs 1 and the screen 2 (an included angle alpha formed by the first side wall 130 and the screen 2), preventing the materials from directly impacting the coarse material discharge hole 430, providing a spiral guide channel for the materials, and prolonging the screening path of the materials in a limited space; meanwhile, part of the materials are brought to the upper part of the screen 2 under the combined action of centrifugal force and the buffer ribs 1, so that the net surface above the screen 2 also participates in screening work, and the screen work area is increased to the greatest extent; the unscreened materials drop from the buffer ribs 1 at the upper part of the screen 2 to other buffer ribs 1 which are arranged in a crossed and staggered way or the screen surface of the screen 2, so that the materials not only have axial circulation but also have radial rolling, and a rolling, jumping and beating impact movement process of the materials is formed; the buffer ribs 1 are longitudinally staggered along the inner side wall of the screen 2 to stir the materials in a cross composite way, so that the materials fully circulate, the stirring effect is improved to the greatest extent, the materials are scattered, and the adhesion agglomeration among the materials is reduced;
During the screening process of the materials in the screen, part of the materials are discharged from the undersize material outlet 410, the screen 2 is discharged, and the coarse materials are discharged from the coarse material outlet 430, so that the separation of the materials is completed.
The invention is further described below in connection with specific embodiments.
Example 1
In the buffer rib 1 of this embodiment, as shown in fig. 1, the first side wall 130 faces the screen feeding end 220, and forms a certain included angle a with the screen inner side wall 210, where the included angle a is 0 °.
As shown in fig. 3, the buffer ribs 1 are uniformly distributed on the inner side wall 210 of the screen, are circumferentially spirally distributed along the inner side wall 210 of the screen, and are longitudinally staggered along the inner side wall 210 of the screen.
The working principle of the drum screen buffer rib in the drum screen machine in the embodiment is as follows:
example 2
Further, the improvement in this embodiment is that, compared with embodiment 1: with reference to fig. 2 and 3, the front end 111 of the bumper rib toward the screen feed end 220 has a relative height Δh 1 with the bottom (120), and the rear end 112 of the bumper rib toward the screen discharge end 230 has a relative height Δh 2,ΔH1 less than Δh 2 with the bottom 120;
the first sidewall 130 forms an angle a with the screen inner sidewall 210, preferably 30.
The inner side wall 210 of the screen is welded with the drum screening machine with the buffer rib 1, the inner side wall of the screen 2 is also coated with a layer of ultra-high molecular polyethylene membrane, and the molecular weight is higher than 300 ten thousand; the screen 2 is arranged obliquely so as to have a high end and a low end; the screen feed end 220 is located at the high end and is connected to the feed port 420; screen discharge end 230 is located at the lower end and is connected to coarse material discharge port 430.
Example 3
Further, the improvement in this embodiment is that, compared with embodiment 2: the angle alpha formed by the first side wall 130 of the buffer rib 1 and the inner side wall 210 of the screen mesh is preferably 45 degrees.
The length of the buffer rib 1 is one tenth of the circumference of the screen 2, and the relative height of the rear end 112 and the bottom 120 is two DeltaH 2 which is one tenth of the diameter of the screen 2.
Referring to fig. 3, the pitch P of the buffer rib 1 on the inner side wall 210 of the screen is 200mm, and the pitch angle β is greater than 0 ° and smaller than 90 °, and is preferably 10 ° in this embodiment.
The buffer rib 1 is detachably mounted on the inner side wall 210 of the screen mesh of the drum screening machine in this embodiment, and the mounting manner is as shown in fig. 4, and is mounted by bolts.
Example 4
Further, the improvement in this embodiment is that, compared with embodiment 2: as shown in fig. 1, the maximum width of the bottom 120 of the buffer rib 1, i.e., W 1, is greater than the maximum width of the first sidewall 130, i.e., two W 2.
The angle alpha formed by the first side wall 130 of the buffer rib 1 and the inner side wall 210 of the screen mesh is preferably 60 degrees.
The length of the buffer rib 1 is one quarter of the circumference of the screen 2, and the relative height of the rear end 112 and the bottom 120 is one seventh of the diameter of the screen 2 by two delta H 2.
The pitch P of the buffer rib 1 on the inner side wall 210 of the screen is 400mm, and the helix angle beta is preferably 45 degrees.
The buffer rib 1 is detachably mounted on the inner side wall 210 of the screen mesh of the drum screening machine in the embodiment, and the mounting mode is rivet mounting.
Example 5
Further, the improvement in this embodiment is that, compared with embodiment 4: the first connection 131 between the first sidewall 130 and the inner sidewall 210 and the second connection 141 between the second sidewall 140 and the inner sidewall 210 are arc transitions.
The included angle alpha formed by the first side wall 130 of the buffer rib 1 and the inner side wall 210 of the screen is 90 degrees.
The buffer rib 1 is one eighth of the diameter of the screen 2 at one eighth of the screen inner side wall 210 and the relative height of the rear end 112 and the bottom 120 is two delta H 2.
The pitch P of the buffer rib 1 on the inner side wall 210 of the screen is 300mm, and the helix angle beta is preferably 80 degrees.
The buffer rib 1 is mounted on the inner side wall 210 of the screen mesh of the drum screening machine in the embodiment.
Example 6
Further, the improvement in this embodiment is that, compared with embodiment 5: the buffer rib (1) is made of wear-resistant materials (UP-X750 series wear-resistant materials of Suzhou excellent thunder wear-resistant composite materials Co., ltd.) and has a rough surface and a hollow interior.
The included angle alpha formed by the first side wall 130 of the buffer rib 1 and the inner side wall 210 of the screen is 80 degrees.
The buffer rib 1 is one-sixth the diameter of the screen 2 at the relative height of the rear end 112 and the bottom 120 of one-ninth the screen inner side wall 210.
The pitch P of the buffer rib 1 on the inner side wall 210 of the screen is 250mm, and the helix angle beta is preferably 60 degrees.
The buffer rib 1 is mounted on the inner side wall 210 of the screen mesh of the drum screening machine in the embodiment.
Claims (9)
1. The utility model provides a drum sieve buffer rib installs on screen cloth inside wall (210) of drum sieve screen cloth (2), its characterized in that: the buffer rib (1) comprises a bottom (120) and a side wall connected with the bottom;
the bottom (120) is connected with the inner side wall (210) of the screen in a matching way;
The side walls comprise first side walls (130) and second side walls (140), the first side walls (130) and the second side walls (140) are connected to form a ridge beam part (110), and the ridge beam part (110) is streamline in the length direction of the buffer rib (1); the buffer rib (1) comprises a front end (111) and a rear end (112), and the height of the ridge beam part (110) gradually increases from the front end to the rear end;
The first side wall (130) faces the screen feeding end (220) and forms an included angle alpha with the screen inner side wall (210), and the included angle alpha is 0-90 degrees;
The first connection part (131) of the first side wall (130) and the inner side wall (210) of the screen mesh and the second connection part (141) of the second side wall (140) and the inner side wall (210) of the screen mesh of the buffer rib (1) are in arc transition;
the buffer ribs (1) are longitudinally staggered along the inner side wall (210) of the screen.
2. A trommel buffer bar as claimed in claim 1, wherein: the relative height delta H 1 of the front end (111) and the bottom (120) of the buffer rib (1) is smaller than the relative height delta H 2 of the rear end (112) and the bottom (120).
3. A trommel buffer bar as claimed in claim 1 or 2, wherein: the length of the buffer rib (1) is one tenth to one fourth of the circumference of the screen (2), and the relative height of the rear end (112) and the bottom is two delta H2 which is one tenth to one seventh of the diameter of the screen (2).
4. A trommel buffer bar as claimed in claim 3, wherein: the maximum width W 1 of the bottom (120) of the buffer rib (1) is larger than the maximum width two W 2 of the first side wall (130).
5. A trommel buffer bar as claimed in claim 1, wherein: the buffer rib (1) can be directly welded on the inner side wall (210) of the screen or detachably fixed on the inner side wall (210) of the screen.
6. A trommel buffer bar as claimed in claim 1, wherein: the buffer rib (1) is made of wear-resistant materials, has a rough surface and is hollow.
7. A drum screening machine comprising a screen (2), characterized in that: the buffer ribs (1) as set forth in any one of claims 1 to 6 are uniformly arranged on the inner side wall (210) of the screen (2).
8. A drum screen as set forth in claim 7, wherein: the buffer ribs (1) are uniformly distributed on the inner side wall (210) of the screen, circumferentially distributed along the inner side wall (210) of the screen is in a spiral shape, the distribution pitch P is 200-400 mm, and the spiral angle beta is larger than 0 degrees and smaller than 90 degrees.
9. A drum screen as claimed in claim 8, wherein: the inner side wall of the screen (2) is coated with a layer of ultra-high molecular polyethylene membrane, and the molecular weight is higher than 300 ten thousand; the screen (2) is obliquely arranged so as to have a high end and a low end; the screen feeding end (220) is positioned at the high end; the screen discharge end (230) is located at the lower end.
Priority Applications (1)
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| CN110882923B (en) * | 2019-12-11 | 2022-07-12 | 安徽聚力粮机科技股份有限公司 | Grain cleaning equipment capable of conducting segmented grading cleaning |
| CN112958430A (en) * | 2021-03-20 | 2021-06-15 | 昆明克林轻工机械有限责任公司 | Drum-type sugarcane removes sand edulcoration device |
| CN113351475B (en) * | 2021-06-29 | 2022-11-11 | 三峡大学 | Roller stone screening machine |
| CN113680540B (en) * | 2021-08-20 | 2024-07-26 | 江苏巨鼎环保节能设备制造有限公司 | Full-automatic suspension type centrifuge |
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