CN111014028A

CN111014028A - High-resilience anti-blocking-hole polyurethane bar screen mesh and preparation method thereof

Info

Publication number: CN111014028A
Application number: CN201911400892.3A
Authority: CN
Inventors: 程尧; 马险峰; 程舜禹
Original assignee: Anhui Fangyuan Plastic & Rubber Co ltd
Current assignee: Anhui Fangyuan Plastic & Rubber Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-17

Abstract

A high-resilience anti-blocking hole polyurethane bar screen mesh consists of a tensioning hook, a fixing plate, a bolt, round steel and a polyurethane bar screen surface, and is characterized in that the polyurethane bar screen surface is a reinforced area formed by steel wire rope core polyurethane coating rubber bars, an aramid fiber rope core polyurethane coating rubber bar is warp yarns, a frameless polyurethane coating rubber bar is weft yarns, and a binding point is formed into a screen area through hot melting welding; all the sieve holes on the sieve surface are in an inverted cone shape. The production process comprises the following steps: firstly, using different materials of a steel wire rope, an aramid fiber rope or a frameless structure as core wires to produce a trapezoidal section cladding bar on an extruder; secondly, according to hole type demand hot melt welding silk screen junction, steel wire rope core polyurethane cladding stick sets up in tight hook installation department that rises, and the woof sets up to aramid fiber rope core polyurethane cladding glue stick, and the woof sets up to no skeleton polyurethane stick, and thirdly, the screen cloth limit portion is tightened tight hook, round steel and fixed plate with the bolt that rises. The invention has the characteristics of high wear resistance, good elasticity, strong toughness, strong screen mesh deformation capability and excellent self-cleaning effect.

Description

High-resilience anti-blocking-hole polyurethane bar screen mesh and preparation method thereof

The technical field is as follows:

the invention relates to a material grading and screening device, in particular to a high-resilience anti-blocking-hole polyurethane bar screen and a preparation method thereof.

Technical background:

the polyurethane bar screen mesh produced and used at present uses a steel wire rope core coated polyurethane layer as a warp and weft wire, and is woven and hot-melt welded into a mesh shape at a certain temperature and process, a specially-made metal tensioning hook is arranged at the edge part, the mesh screen mesh is tensioned on a screen machine wall plate by a specially-made fixed bent iron and a tensioning bolt when in use, and the purposes of prolonging the service life and improving the wear resistance of the screen mesh are achieved by utilizing the rigidity and the strength of the steel wire rope and the high wear resistance of polyurethane. However, the bar screen with the polyurethane layer coated on the steel wire rope core used at present can have the following phenomena in the using process: because the cross-section of polyurethane stick sieve is circular, the pass just forms the hyperbola type, and the first half of pass is big-end-up, and wire rope is difficult for the deformation at the vibration in-process as the stick of skeleton, causes some particle material with similar size of sieve mesh to press from both sides in the hole, and difficult thru hole has the large tracts of land stifled hole phenomenon to appear, causes the regional inefficacy of screening, influences screening efficiency, seriously influences the screening effect.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a high-resilience anti-blocking-hole polyurethane bar screen and a preparation method thereof, wherein the high-resilience anti-blocking-hole polyurethane bar screen has excellent high wear resistance, high resilience, strong toughness and self-cleaning property, can effectively eliminate the hole blocking phenomenon of a screen surface, improves the screening effect, reduces the maintenance difficulty and improves the working efficiency.

The invention relates to a high-resilience anti-blocking hole polyurethane bar screen mesh and a preparation method thereof, wherein the bar screen mesh consists of tensioning hooks, a fixed plate, bolts, round steel and a polyurethane bar mesh, and is characterized in that the polyurethane bar screen mesh consists of polyurethane steel wire rope coated rubber bar strips, polyurethane aramid fiber rope coated rubber bar strips and polyurethane skeleton-free bar strips, the aramid fiber rope polyurethane coated rubber bar strips are used as warp yarns, the steel wire rope coated polyurethane bar strips are used for reinforcing the mounting position of the tensioning hooks at the edge part of the screen mesh, and the skeleton-free polyurethane bar strips are used as weft yarns of the screen mesh and are arranged in a screening area; the cross sections of the bars used by the bar screen are all inverted trapezoids.

The production process of the invention comprises the following steps: firstly, drawing wires with different materials of steel wire ropes, aramid ropes or frameless as core wires on an extruder to produce polyurethane coated bars according to requirements; the extrusion port is designed to ensure that the section of the polyurethane coated glue stick strip is trapezoidal; secondly, according to the pass demand hot melt welding silk screen joint, steel wire rope core polyurethane cladding stick sets up in tight hook installation department that rises, and the woof sets up to aramid fiber rope core polyurethane cladding glue stick, and the woof sets up to no skeleton polyurethane stick, and thirdly, tighten tight hook and fixed plate with the bolt to screen cloth edge portion, the round steel is placed in screen cloth edge portion tight hook and fixed plate centre that rises for increase the tight intensity that rises of screen cloth.

The working principle of the invention is as follows: according to the invention, the aramid rope core polyurethane bar is used as the warp yarn, the strength of the aramid fiber and the high wear resistance of the polyurethane high-molecular elastomer are fully utilized, and the strength and the service life of the screen are ensured; the steel wire rope core polyurethane bars and the round steel are used for edge reinforcement, so that the edge strength can be effectively reinforced, and the firmness and reliability of installation are improved; the framework-free polyurethane bar is adopted as the weft, so that the pass of the screen is tidy, the size meets the requirement, and the polyurethane framework-free bar has elasticity, so that the material can be bounced or screened through by deformation under the vibration condition of the screening machine when the material enters the screen holes.

The invention has the advantages that: 1. the product has the advantages of wear resistance, high elasticity, strong toughness, strong screen mesh deformation capability and excellent self-cleaning effect, and is particularly suitable for grading materials with medium and fine particle sizes and irregular shapes; 2. the invention is a great technical improvement to the prior bar screen, and the expansion strength of the screen is ensured by arranging the steel wire rope polyurethane coated rubber bars; the adoption of the aramid cord polyurethane coating glue bar ensures the strength and toughness of the longitudinal tension of the screen; through the arrangement of the framework-free polyurethane bar weft, the integrity of the screen is ensured, and the hole patterns between the weft are transversely deformed due to the elastic extension of the framework-free polyurethane weft, so that materials with the granularity close to the hole pattern size can smoothly pass through the screen, and the screening efficiency is improved; 3. the sieve plate not only has excellent wear resistance, corrosion resistance, oil resistance and aging resistance, but also has very strong toughness, and the bars can generate strong secondary high resonance when the sieve plate vibrates, thereby effectively preventing the phenomenon of hole blockage; 4. due to the design of the inverted trapezoid cross section of the bar, all sieve holes are inverted conical, which is beneficial to the sieving of materials; 5. the adoption of nonmetal materials such as aramid fiber rope, polyurethane, etc. under the prerequisite that does not reduce screen cloth intensity, greatly reduced the weight of screen cloth, easy to assemble and maintenance have reduced the energy consumption of sieve machine.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is an enlarged view of a in fig. 2.

In the figure, 1, a tension hook, 2, a fixing plate, 3, a bolt, 4, round steel, 5, a polyurethane-coated rubber bar screen, 51, a steel wire rope core polyurethane-coated rubber bar, 52, an aramid rope core polyurethane-coated rubber bar and 53, a frameless polyurethane bar.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the invention relates to a high-resilience anti-blocking hole polyurethane bar screen mesh, which comprises a tensioning hook 1, a fixing plate 2, a bolt 3, round steel 4 and a polyurethane bar screen surface 5, and is characterized in that the polyurethane bar screen surface is formed by taking a steel wire rope core polyurethane coated rubber bar 51 as a reinforcing area, taking an aramid fiber rope core polyurethane coated rubber bar 52 as a weft and taking a frameless polyurethane coated rubber bar 53 as a screen area of the weft; the warp and weft wire joint points of the screening area are integrated through hot melting welding.

As shown in fig. 2, the cross sections of the warp and weft of the polyurethane screen surface 5 are inverted trapezoids, so that all screen holes are inverted conical.

As shown in fig. 3, the edge of the screen surface 5 is tightened between the tightening hook 1 and the fixing plate 2 by the bolt 3, and the edge is provided with a steel wire rope core polyurethane bar 52 and reinforced by round steel 4.

The production process of the invention comprises the following steps: firstly, drawing wires with different materials of steel wire ropes, aramid ropes or frameless as core wires on an extruder to produce polyurethane coated bars according to requirements; the extrusion port is specially designed to ensure that the section of the polyurethane coated glue stick strip is trapezoidal; secondly, according to the pass demand hot melt welding silk screen junction, steel wire rope core polyurethane cladding glue stick 51 sets up in the tight hook 1 installation department that rises, and the warp setting is aramid fiber rope core polyurethane cladding glue stick 52, and the weft setting is no skeleton polyurethane stick 53, thirdly, tighten tight hook 1 and fixed plate 2 with bolt 3 to screen cloth edge portion, and round steel 4 is placed in 5 edges portion of screen cloth tight hook 1 and fixed plate 2 centre for increase the tight intensity that rises of polyurethane stick screen surface 5.

Claims

1. The invention relates to a high-resilience anti-blocking hole polyurethane bar screen mesh and a preparation method thereof, wherein the polyurethane bar screen mesh is composed of a tensioning hook (1), a fixing plate (2), a bolt (3), round steel (4) and a polyurethane bar screen surface (5), and is characterized in that the polyurethane bar screen surface (5) is formed by using a steel wire rope core polyurethane coated adhesive bar strip (51) as a reinforcing area, an aramid fiber rope core polyurethane coated adhesive bar strip (52) as warp yarns, a frameless polyurethane coated adhesive bar strip (53) as weft yarns and performing hot melting welding.

2. The polyurethane screen surface (5) of claim 1 wherein the cross-section of the warp and weft filaments is inverted trapezoidal, such that all the screen holes are inverted conical.

3. The edge of the screen surface (5) of the bar screen is tightened by a bolt (3) between a tension hook (1) and a fixing plate (2), the edge is a reinforcing area of a steel wire rope core polyurethane coated rubber bar (51) as a weft, and a round steel (4) is attached to reinforce the reinforcing area, so that the tension capability of the screen is improved.

4. The method for forming the high-resilience anti-blocking hole polyurethane bar screen mesh in claim 1 comprises the following steps: firstly, drawing wires with different materials of steel wire ropes, aramid ropes or frameless as core wires on an extruder to produce polyurethane coated bars according to requirements; the extrusion port is specially designed to ensure that the section of the polyurethane coated glue stick strip is trapezoidal; secondly, according to the pass demand hot melt welding silk screen junction, wire rope core polyurethane cladding stick (51) set up in tight hook (1) installation department, the warp sets up to aramid fiber core polyurethane cladding glue stick (52), the woof sets up to no skeleton polyurethane stick (53), three, tighten tight hook (1) and fixed plate (2) with bolt (3) to screen cloth (5) limit portion, round steel (4) are placed in the middle of tight hook (1) and fixed plate (2) of screen cloth (5) limit portion, be used for increasing the tight intensity that rises of screen cloth (5).