Sand screening machine for civil construction

Abstract

According to the sand screening machine for civil construction, a roller comprises a conical barrel composed of a feeding roller at the left end and a net-shaped roller at the right end, the left end opening of the conical barrel is smaller than the right end opening of the conical barrel, spiral blades distributed in the feeding roller and the net-shaped roller are fixed to a rotating shaft, a spiral material guide plate is arranged on the inner roller wall of the feeding roller, and a material receiving hopper is fixed to a support; the bottom of the right side of the feeding roller is matched with an arc-shaped groove in the left side wall of the receiving hopper in a non-contact mode, the lower portion of the net-shaped roller extends into the receiving hopper, and the upper end faces of the front side and the rear side of the support are each provided with an impurity cleaning device used for guiding lateral materials screened out by the net-shaped roller and cleaning impurities clamped in meshes of the net-shaped roller. And the lower end of the impurity cleaning device extends into the receiving hopper. By optimizing the passing structure of the roller, the strength of the inlet section of the roller body is improved, the service life of the inlet section of the roller body is prolonged, under the combined action of the material guide plate and the spiral blade of the section, convenience is provided for rapid guiding-in of materials of the feeding section, and the defects that the materials of the feeding section are too many and load bearing is concentrated are overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand screening machines, in particular to a sand screening machine for civil engineering and construction. Background Art

[0002] Sand refers to small stone particles. In the process of preparing concrete, sand is usually needed. In construction projects, sand screening is an important step to clean up waste rocks in sand materials and separate coarse sand from fine sand. The quality of sand materials after screening directly affects the overall quality of the building. The traditional vibrating screen sand screening machine is mainly composed of a fixed vibrating screen, which can be used with an exciter to separate sand and gravel. Due to the design defects of the screening structure, debris is not easy to be discharged during the screening process, and sand and gravel will be stuck in the screen during the screening process. Therefore, a high-pressure water gun is used to flush the sand and gravel. Since the angle of the screen is fixed, traditional flushing requires personnel to drill under the screen for flushing, and the flushed sand and gravel fall back into the screen holes, which can easily cause secondary blockage, and the flushing efficiency is very low, and water resources are seriously wasted; the document with patent number 202020941808.0 and the name "Civil Engineering Sand Screening Equipment" (hereinafter referred to as the comparative document) has the following problems: 1. Since the left port of the mesh drum 3 is smaller than the right port The conical structure is conducive to the rapid and smooth discharge of debris at the screening site from the right port of the mesh drum, thereby avoiding the adverse effects of debris on subsequent screening work. However, after production, when the material intake at the feed end increases, the material is likely to be concentrated at the left end of the mesh drum. The material at the left end cannot be moved down in time, affecting the screening efficiency, and the screen at the left end of the mesh drum is more susceptible to damage than the right end. Second, although a debris removal device is provided for cleaning debris stuck on the mesh drum, the structure is directly fixed to the outer side of the upper edge of the receiving hopper. Whether it is the disassembly and replacement of the receiving hopper or the guard plate, this integrated structure will restrict and affect each other at the time, which brings inconvenience to the later replacement and maintenance. Therefore, it is necessary to make improvements to the above problems. Utility Model Content

[0003] The technical problem solved by the utility model is as follows: a sand screening machine for civil engineering and construction is provided, which optimizes the drum passing structure and adopts a drum which is a tapered drum with a left end opening smaller than a right end opening and is composed of a feed drum at the left end and a mesh drum at the right end, thereby improving the strength and service life of the drum body of the inlet section, and arranging a spiral material guide plate on the inner drum wall of the feed drum, under the joint action of the spiral blade of this section, facilitates the rapid introduction of materials in the feed section, avoids the disadvantages of a large amount of materials and concentrated load in the feed section, and provides a way to improve the material screening efficiency, and optimizes the structure of the debris cleaning device to realize the separate installation of the receiving hopper and the debris cleaning device on the bracket, without affecting the cleaning of debris in the mesh holes of the mesh drum, so that the installation structure of the debris cleaning device and the fixed structure of the receiving hopper do not interfere with each other.

[0004] The technical solution adopted by the utility model is as follows: a sand screening machine for civil engineering and construction, comprising a bracket, a rotating motor mounted on a motor frame at the upper left end of the bracket, a roller above the bracket, a rotating shaft penetrating the roller and rotatably connected to both ends of the roller, the rotating shaft being rotatably supported on the bracket by bearing seats arranged at both ends of the bracket, and the left end of the rotating shaft being fixedly connected to the output shaft of the rotating motor, an active tooth meshing with an internal gear on the inner wall of the left end of the roller being fixed on the output shaft of the motor mounted at the left end of the bracket, the debris screened out of the roller is discharged through a discharge trough arranged in the middle of the right end of the bracket, the roller comprising a feed roller at the left end and a mesh roller at the right end, the opening at the left end being smaller than the opening at the right end The conical cylinder has spiral blades distributed in the feed roller and the mesh roller fixed on the rotating shaft, and a spiral guide plate for auxiliaryly guiding the material in the feed roller into the mesh roller for screening is provided on the inner cylinder wall of the feed roller. A material receiving hopper located below the mesh roller is fixed on the bracket, and the right bottom of the feed roller is non-contactly adapted to the arc groove on the left wall of the material receiving hopper, and the lower part of the mesh roller extends into the material receiving hopper. The upper end surfaces of the front and rear sides of the bracket are provided with debris cleaning devices for guiding the lateral materials screened by the mesh roller and cleaning the debris stuck in the mesh of the mesh roller, and the lower end of the debris cleaning device extends into the material receiving hopper.

[0005] The debris cleaning device includes a support frame, a fixed plate, a pressure plate and a wear-resistant rubber plate. The support frame is an A-shaped structure with a vertical plate on one side and an inclined plate on the other side, and a reinforcing plate is provided between the inclined plate and the vertical plate. The vertical plate of the support frame is arranged outward and is fixed to the upper end surface of the bracket by a connecting plate bolt fixed to the outer wall of the lower end of the vertical plate. The lower end of the inclined plate of the support frame is located on the inner side of the corresponding plate surface of the hopper, and multiple fixed plates are fixed on the inner side plate surface of the inclined plate of the support frame. The pressure plate is located above the fixed plate, and the fixed plate and the pressure plate There are multiple through holes corresponding to the positions. The wear-resistant rubber plate is located between the fixed plate 1 and the pressure plate, and the multiple waist-shaped holes on the surface of the wear-resistant rubber plate correspond to the positions of the through holes on the fixed plate 1 and the pressure plate. The locking bolts pass through the through holes, waist-shaped holes and through holes on the pressure plate, fit the locking nuts and tighten them to fix the wear-resistant rubber plate on the inclined plate of the support frame. The end of the wear-resistant rubber plate facing the mesh drum contacts the outer mesh wall of the mesh drum, and the wear-resistant rubber plate scrapes off debris stuck in the mesh holes of the mesh drum in the rotating state.

[0006] Furthermore, a second fixing plate parallel to the upper end surface of the bracket is fixed to the upper edges of the front and rear sides of the receiving hopper, and the second fixing plate located on the inner side of the debris cleaning device is fixed to the bracket by bolts.

[0007] The advantages of this utility model compared with the prior art are:

[0008] 1. This technical solution optimizes the drum passing structure and adopts a drum with a feed drum at the left end and a mesh drum at the right end, which is a tapered drum with a smaller opening at the left end than the right end. This improves the strength and service life of the drum body at the inlet section. In addition, a spiral guide plate is provided on the inner wall of the feed drum. Under the joint action of the spiral blades in this section, it facilitates the rapid introduction of materials in the feed section, avoids the disadvantages of a large amount of materials and concentrated load in the feed section, and provides a way to improve the material screening efficiency.

[0009] 2. This technical solution optimizes the structure of the debris cleaning device to achieve the separate installation of the receiving hopper and the debris cleaning device on the bracket. Under the premise of not affecting the cleaning of debris in the mesh of the mesh drum, the installation structure of the debris cleaning device and the fixed structure of the receiving hopper do not interfere with each other. Whether it is the replacement of the hopper or the debris cleaning device, they can achieve the effect of not affecting each other.

[0010] 3. This technical solution has a simple structure, reasonable design, prolonged drum service life, high screening efficiency, good screening effect, and has high promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the main view of the structure of the utility model;

[0012] Figure 2 This is the left side view of the structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the connection structure of the roller and the rotating shaft of the utility model;

[0014] Figure 4 This is a schematic diagram of the position structure of the spiral guide plate and the rotating shaft without spiral blades installed in the utility model. DETAILED DESCRIPTION

[0015] The following is a combination of the embodiments of the present invention Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0016] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate positions or relationships based on those shown in the accompanying drawings. These are intended only to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] As used herein, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0018] The sand screening machine for civil engineering and construction comprises a bracket 1, a rotating motor 2 mounted on a motor frame at the upper left end of the bracket 1, a roller 3 above the bracket 1, a rotating shaft 5 penetrating the roller 3 and rotatably connected to both ends of the roller 3, the rotating shaft 5 being rotatably supported on the bracket 1 by bearing seats 7 provided at both ends of the bracket 1, and the left end of the rotating shaft 5 being fixedly connected to the output shaft of the rotating motor 2, the output shaft of the motor 8 mounted at the left end of the bracket 1 being fixed with a driving tooth 10 meshing with an internal gear 9 on the inner wall of the left end of the roller 3, and the inner wall of the roller 3 being fixed with a driving tooth 10 meshing with an internal gear 9 The screened debris is discharged from the discharge trough 6 provided at the middle of the right end of the bracket 1. The drum 3 is composed of a feed drum 3-1 at the left end and a mesh drum 3-2 at the right end, which is a tapered drum with a left end opening smaller than the right end opening. The rotating shaft 5 is fixed with spiral blades 4 distributed in the feed drum 3-1 and the mesh drum 3-2, and a spiral guide plate 11 for auxiliaryly guiding the material in the feed drum 3-1 into the mesh drum 3-2 for screening is provided on the inner wall of the feed drum 3-1. The bracket 1 A receiving hopper 12 is fixed on the top and is located below the mesh drum 3-2. The right bottom of the feed drum 3-1 is non-contactly adapted to the arc groove on the left wall of the receiving hopper 12, and the lower part of the mesh drum 3-2 extends into the receiving hopper 12. The upper end surfaces of the front and rear sides of the bracket 1 are provided with a debris cleaning device for guiding the lateral materials screened by the mesh drum 3-2 and cleaning the debris stuck in the mesh of the mesh drum 3-2, and the lower end of the debris cleaning device extends into the receiving hopper 12; in the above structure By optimizing the roller passing structure, a roller 3 with a tapered opening at the left end smaller than the right end is adopted, which is composed of a feed roller 3-1 at the left end and a mesh roller 3-2 at the right end. The strength and service life of the inlet section cylinder are improved, and a spiral guide plate 11 is provided on the inner wall of the feed roller 3-1. Under the joint action of the spiral blade 4 of this section, it facilitates the rapid introduction of materials in the feed section, avoids the disadvantages of a large amount of materials in the feed section and concentrated load, and provides conditions for improving the material screening efficiency.

[0019] The specific structure of the debris cleaning device after optimization is as follows: the debris cleaning device includes a support frame 13, a fixing plate 14, a pressure plate 15 and a wear-resistant rubber plate 16. The support frame 13 is an A-shaped structure with a vertical plate on one side and an inclined plate on the other side, and a reinforcing plate is provided between the inclined plate and the vertical plate. The vertical plate in the support frame 13 is used to connect with the bracket 1 and provide support conditions for the inclined plate. The inclined plate facilitates the installation of the wear-resistant rubber plate 16, provides reliable support for it, and is convenient for The sand material thrown out laterally by the mesh drum 3-2 is guided so that it can smoothly enter the receiving hopper 12, and the vertical plate of the support frame 13 is arranged outward and fixed to the upper end surface of the bracket 1 through the connecting plate bolts fixed on the outer wall of the lower end of the vertical plate. The lower end of the inclined plate of the support frame 13 is located on the inner side of the corresponding plate surface of the receiving hopper 12, and multiple fixed plates 14 are fixed on the inner side plate surface of the inclined plate of the support frame 13. The pressing plate 15 is located above the fixed plate 14, and multiple fixed plates 14 and the pressing plate 15 are formed on the fixed plate 14. The wear-resistant rubber plate 16 is located between the fixing plate 14 and the pressure plate 15, and the multiple waist-shaped holes on the surface of the wear-resistant rubber plate 16 correspond to the positions of the through holes on the fixing plate 14 and the pressure plate 15. The locking bolts pass through the through holes, waist-shaped holes and through holes on the pressure plate 15 and the fixing plate 14 in sequence and are adapted to the locking nuts and tightened to fix the wear-resistant rubber plate 16 to the inclined plate of the support frame 13. One end of the wear-resistant rubber plate 16 facing the mesh roller 3-2 is aligned with the mesh roller. 3-2 outer mesh cylinder wall contacts, and the wear-resistant rubber plate 16 scrapes off the debris stuck in the mesh of the mesh drum 3-2 in the rotating state; the above structure is adopted to realize the separate installation of the receiving hopper 12 and the debris cleaning device on the bracket 1, without affecting the cleaning of the debris in the mesh of the mesh drum 3-2, so that the installation structure of the debris cleaning device and the fixed structure of the receiving hopper 12 do not interfere with each other, whether it is the replacement of the docking hopper 12 or the debris cleaning device, both can achieve the effect of not affecting each other;

[0020] Among them, a second fixing plate 17 parallel to the upper end surface of the bracket 1 is fixed to the upper edges of the front and rear sides of the receiving hopper 12, and the second fixing plate 17 located on the inner side of the debris cleaning device is fixed to the bracket 1 by bolts.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A sand screening machine for civil engineering and construction, comprising a support (1), a rotating motor (2) mounted on a motor frame at the upper left end of the support (1), a roller (3) above the support (1), and a rotating shaft (5) penetrating the roller (3) and rotatably connected to both ends of the roller (3), wherein the rotating shaft (5) is rotatably supported on the support (1) by bearing seats (7) provided at both ends of the support (1), and the left end of the rotating shaft (5) is fixedly connected to the output shaft of the rotating motor (2), and an active tooth (10) meshing with an internal gear (9) on the inner wall of the left end of the roller (3) is fixed on the output shaft of the motor (8) installed at the left end of the support (1), and the debris screened out of the roller (3) is discharged from a discharge trough (6) provided in the middle of the right end of the support (1), characterized in that: The roller (3) comprises a feed roller (3-1) at the left end and a mesh roller (3-2) at the right end, which is a conical cylinder with a left end opening smaller than a right end opening. The rotating shaft (5) is fixed with spiral blades (4) distributed in the feed roller (3-1) and the mesh roller (3-2). The inner wall of the feed roller (3-1) is provided with a spiral guide plate (11) for auxiliaryly guiding the material in the feed roller (3-1) into the mesh roller (3-2) for screening. The bracket (1) is fixed with a spiral guide plate (11) located in the mesh roller (3-2). The receiving hopper (12) is located below the mesh roller (3-2), the right bottom of the feed roller (3-1) is non-contactly matched with the arc groove on the left wall of the receiving hopper (12), and the lower part of the mesh roller (3-2) extends into the receiving hopper (12), and the upper end surfaces of the front and rear sides of the bracket (1) are provided with a debris cleaning device for guiding the lateral materials screened by the mesh roller (3-2) and cleaning the debris stuck in the mesh of the mesh roller (3-2), and the lower end of the debris cleaning device extends into the receiving hopper (12).

2. The sand screening machine for civil engineering and construction according to claim 1, characterized in that: The debris cleaning device includes a support frame (13), a fixed plate (14), a pressure plate (15) and a wear-resistant rubber plate (16), wherein the support frame (13) is an A-shaped structure with a vertical plate on one side and an inclined plate on the other side, and a reinforcing plate is provided between the inclined plate and the vertical plate. The vertical plate of the support frame (13) is arranged outward and is fixed to the upper end surface of the bracket (1) by a connecting plate bolt fixed on the outer wall of the lower end of the vertical plate. The lower end of the inclined plate of the support frame (13) is located on the inner side of the corresponding plate surface of the receiving hopper (12), and a plurality of fixed plates (14) are fixed on the inner side plate surface of the inclined plate of the support frame (13). The pressure plate (15) is located above the fixed plate (14), and the fixed plate (14) and the pressure plate (15) are both provided with The plurality of through holes corresponding to the positions are provided, the wear-resistant rubber plate (16) is located between the fixed plate (14) and the pressure plate (15), and the plurality of waist-shaped holes provided on the surface of the wear-resistant rubber plate (16) correspond to the positions of the through holes on the fixed plate (14) and the pressure plate (15), the locking bolts pass through the through holes, waist-shaped holes and through holes on the pressure plate (15) and the fixed plate (14) in sequence, and are adapted to the locking nuts and tightened to fix the wear-resistant rubber plate (16) to the inclined plate of the support frame (13), the end of the wear-resistant rubber plate (16) facing the mesh drum (3-2) contacts the outer mesh wall of the mesh drum (3-2), and the wear-resistant rubber plate (16) scrapes off the debris stuck in the mesh holes of the mesh drum (3-2) in the rotating state.

3. The sand screening machine for civil engineering and construction according to claim 1, characterized in that: A second fixing plate (17) parallel to the upper end surface of the bracket (1) is fixed to the upper edges of the front and rear sides of the receiving hopper (12), and the second fixing plate (17) located on the inner side of the debris cleaning device is fixed to the bracket (1) by bolts.

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