Screening machine for highway construction gravel

Abstract

The utility model discloses a screening machine for highway construction gravel, and relates to the related technical field of highway construction. The vibrating screen comprises two side plates, a screen plate, two pressing plates, a feeding hopper and screen meshes, a connecting cross beam is jointly fixed to the four corners of the opposite faces of the two side plates, the screen plate is obliquely arranged between the two side plates, the screen meshes cover the upper surface and the two side faces of the screen plate, the pressing plates are arranged outside the two side faces of the screen meshes, and the feeding hopper is arranged on the feeding hopper. Battens distributed at equal intervals are fixed between the opposite faces of the two pressing plates, guide inclined blocks distributed at equal intervals are fixed to the bottom face of each batten, and the guide inclined blocks at the bottoms of every two adjacent battens are opposite in inclination direction and distributed in a staggered mode. Through the arrangement of the pressing plate, the strip plate, the guide inclined block, the feeding hopper, the screen plate, the vibration motor and the angle plate, the problems that the storage time of sand on the screen is short, the screening efficiency is insufficient, the screen is prone to deformation due to overlarge local stress, the vibration transmission effect is poor, and the screen is inconvenient to disassemble and assemble are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to highway construction, in particular to a screening machine for sand and gravel in highway construction. Background Art

[0002] Highway construction mainly involves the construction of various roads. However, in the construction process of various highways, various building materials are indispensable, such as various concretes, gravels, sand, etc. Before using the sand, it is necessary to use a related screening machine to screen the sand to remove the large particles of sand and gravel contained in it to obtain the required gravel material. In various construction operations, sand needs to be screened before use, but the related screening machines still have the following disadvantages in actual use:

[0003] First of all, usually the sand stays in the screening machine for a short time, and most of them pass through the screen quickly, screening out fine sand and gravel, and large sand and gravel are located on the upper layer of the screen and flow out. However, because the sand is screened on the screen for a short time, it is easy to cause some of the sand to slide down along the screen surface with the sand and gravel before it has time to pass through the screen, so secondary screening is required, which greatly increases the processing time or causes material waste. Therefore, it is necessary to extend the time of sand on the screen as much as possible to increase screening efficiency;

[0004] Secondly, the sand itself is relatively heavy, and usually the sand is fed in a concentrated manner, which can easily cause the screen below the feed to be deformed by force, thus affecting the service life of the screen;

[0005] Subsequently, sand screening can be divided into rotary and vibratory screening. In the process of vibratory screening, the vibration source is usually outside the screening machine and needs to be transmitted to the screen plate through multiple structures, which affects the transmission effect of the vibration.

[0006] Finally, because screening sieves are made of hard materials, the screens need to be replaced regularly. Under normal operating conditions, the current method of disassembling and assembling the screens (mostly installed with fasteners such as bolts) is still not efficient and convenient enough. Utility Model Content

[0007] The utility model aims to provide a screening machine for sand and gravel for highway construction. By arranging a pressing plate, a strip plate, a guide inclined block, a feed hopper, a screen plate, a vibration motor and an angle plate, the utility model solves the problems of short retention time of sand on the screen, insufficient screening efficiency, easy deformation due to excessive local force on the screen, poor vibration transmission effect and inconvenient disassembly and assembly of the screen.

[0008] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0009] The utility model is a screening machine for sand and gravel for highway construction, comprising two side plates, a screen plate, two pressing plates, a feed hopper and a screen mesh, wherein a connecting crossbeam is fixed at four corners of opposite surfaces of the two side plates, the screen plate is arranged obliquely between the two side plates, the upper surface and two side surfaces of the screen plate are covered with a screen mesh, and pressing plates are arranged outside the two side surfaces of the screen mesh, and strips with equal spacing are fixed between the opposite surfaces of the two pressing plates, and the bottom surface of each strip plate is fixed with guide inclined blocks with equal spacing, and the guide inclined blocks at the bottom of two adjacent strip plates are inclined in opposite directions and are staggered;

[0010] Brackets are fixed at both long sides of the bottom of the sieve plate, the bottom of the bracket is fixed obliquely on the inner wall of the side plate adjacent thereto, an angle plate is fixed between the centers of the two brackets, and a vibration motor is fixed on the two inner right-angled surfaces of the angle plate;

[0011] A feed hopper is also fixed between the two side plates, and the feed hopper is located above the higher end of the screen plate.

[0012] Furthermore, symmetrically distributed convex grooves are provided on the opposite surfaces of the two side panels, and a convex slider is slidably arranged in the convex groove, the upper end of the convex slider is rotatably connected to a screw rod, and the upper end thread of the screw rod passes through the upper end of the side panel and extends out to be fixed with a hand wheel.

[0013] Furthermore, the raised portion of the convex sliding block is fixedly connected to a clamping plate adjacent thereto, and the raised portion of the convex sliding block is flush with the inner wall of the side plate, and a side of the clamping plate away from the screen plate contacts the inner wall of the side plate.

[0014] Furthermore, the side edge of the screen is located between the pressing plate and the side surface of the screen plate, and the strip plate and the guide bevel block are located above the screen, and the bottom surface of the guide bevel block abuts against the upper surface of the screen.

[0015] Furthermore, a discharge channel is fixedly provided through the bottom of the feed hopper, and the lower portion of the discharge channel is located between the two pressing plates and above the higher end of the screen plate.

[0016] Furthermore, crisscross reinforcing steel bars are fixed in the inner cavity of the sieve plate, and the highest point of the reinforcing steel bars is flush with the upper surface of the sieve plate.

[0017] Furthermore, the outer right-angled side of the angle plate is vertically upward, and the two outer right-angled surfaces of the angle plate are inclined with respect to the horizontal plane.

[0018] The utility model has the following beneficial effects:

[0019] The utility model solves the problems of short retention time of sand on the sieve and insufficient screening efficiency by arranging a pressing plate, a strip plate and a guide bevel block. When a large amount of sand enters the sieve plate and above the sieve, it will disperse and pass between the guide bevel blocks under each strip plate. The sand passes through the gaps between a large number of guide bevel blocks instead of directly sliding down along the sieve surface. Therefore, the screening time of the sand on the sieve is effectively prolonged, thereby making the sand screening more thorough. Moreover, because the guide bevel blocks under adjacent strip plates are in opposite directions, the passing path of the sand is further increased, and the screening time of the sieve on the sieve is further increased. The sand screening can be completed at one time without secondary screening. The screening efficiency is higher, the time of secondary operation is saved, and material waste is reduced.

[0020] The utility model solves the problem that the screen is easily deformed due to excessive local force by arranging a feed hopper, a screen plate and a guide bevel block; the discharge channel at the bottom of the feed hopper is a square structure, which is different from the conventional cylindrical discharge channel and just fits the width of the screen plate, so that the discharged material can be evenly distributed on the screen surface, and combined with a large number of guide bevel blocks, the sand can be evenly distributed, and the screen plate part below the discharge channel is a solid structure. After the sand slides down along the screen, it can pass through the screen and fall from the cavity of the screen plate after passing through the guide bevel block.

[0021] The utility model solves the problem of poor vibration transmission effect when the vibration source is located outside the machine by arranging a vibration motor and an angle plate. The angle plate is installed by a bracket, and the vibration motor is installed inside the angle plate. After the vibration motor works, the vibration is directly transmitted to the angle plate and the bracket, and then transmitted to the screen plate. The vibration source is no longer arranged outside the screening machine, so the vibration is better transmitted.

[0022] The utility model solves the problem of inconvenient assembly and disassembly of the screen by arranging a pressing plate; after the screen is covered on the screen plate, the screw rod is rotated to descend, so that the slider and the pressing plate are lowered, pressing the side of the screen to the gap between the side plate and the outside of the screen plate, so that the side portion does not need to be fastened, and only the end of the screen needs to be fixed, and the operation is convenient, reliable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0024] Figure 1 A stereoscopic diagram of a sand and gravel screening machine for highway construction;

[0025] Figure 2 This is the structural diagram after removing a side panel;

[0026] Figure 3 This is the structural diagram of the side panel;

[0027] Figure 4Installation drawing of the pressing plate, screen plate and screen mesh;

[0028] Figure 5 is a top view of the pressing plate;

[0029] Figure 6 It is the connection diagram between the sieve plate and the sieve mesh;

[0030] Figure 7 This is the structural diagram of the sieve plate.

[0031] Reference numerals:

[0032] 1. Side plate; 101. Connecting beam; 102. Screw; 103. Convex slide; 104. Convex slider; 2. Screen plate; 201. Bracket; 202. Angle plate; 203. Vibration motor; 204. Reinforcement steel bar; 3. Pressing plate; 301. Strip plate; 302. Guide bevel block; 4. Feed hopper; 401. Discharge channel; 5. Screen. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] See also Figure 1-7 As shown, the utility model is a screening machine for sand and gravel for highway construction, comprising two side plates 1, a screen plate 2, two pressing plates 3, a feed hopper 4 and a screen 5. A connecting crossbeam 101 is fixed to the four corners of the opposite surfaces of the two side plates 1. The screen plate 2 is obliquely arranged between the two side plates 1. The upper surface and two side surfaces of the screen plate 2 are covered with a screen 5. The outside of the two side surfaces of the screen 5 are provided with a pressing plate 3. Between the opposite surfaces of the two pressing plates 3, equidistantly distributed strips 301 are fixed. The bottom surface of each strip plate 301 is fixed with equidistantly distributed guide oblique blocks 302, and the guide oblique blocks 302 at the bottom of two adjacent strip plates 301 are inclined in opposite directions and are staggered.

[0035] The two side plates 1 are kept stable by four connecting beams 101 to increase the structural strength, and the screen plate 2 is tilted and fixed to the side plate 1 by the bracket 201 to keep it stable, and then the screen 5 is covered on the screen plate 2, and the pressing plate 3 is lowered to press the side of the screen 5 to the gap outside the side plate 1 and the screen plate 2. The side part does not need to be fastened, and only the end of the screen 5 needs to be fixed. At this time, the strip plate 301 and the guide inclined block 302 at the bottom thereof are pressed on the mesh surface of the screen 5. In the subsequent screening process, the sand can only pass through the gap between a large number of guide inclined blocks 302, which effectively prolongs the screening time of the sand on the screen 5, so that the sand screening is more thorough;

[0036] Brackets 201 are fixed to the two long sides of the bottom of the sieve plate 2. The bottom of the bracket 201 is fixed obliquely to the inner wall of the side plate 1 adjacent thereto. An angle plate 202 is fixed between the centers of the two brackets 201. A vibration motor 203 is fixed to the two inner right-angled surfaces of the angle plate 202.

[0037] The bracket 201 is welded to the bottom of the sieve plate 2 as a whole, and the brackets 201 are welded to the angle plates 202. A vibration motor 203 is installed on the inner wall of the angle plates 202 as a vibration source. After vibration, the vibration can be quickly transmitted to the sieve plate 2, reducing the vibration transmission path and achieving a better screening effect.

[0038] A feed hopper 4 is also fixed between the two side plates 1, and the feed hopper 4 is located above the higher end of the screen plate 2, so that subsequent screening is carried out from high to low.

[0039] The opposite surfaces of the two side plates 1 are provided with symmetrically distributed convex grooves 103, and a convex slider 104 is slidably arranged in the convex groove 103, and the upper end of the convex slider 104 is rotatably connected to a screw rod 102, and the upper end of the screw rod 102 is threaded through the upper end of the side plate 1 and extends out to be fixed with a hand wheel;

[0040] The raised portion of the convex slider 104 is fixedly connected to the clamping plate 3 adjacent thereto, and the raised portion of the convex slider 104 is flush with the inner wall of the side plate 1, and the side of the clamping plate 3 away from the screen plate 2 contacts the inner wall of the side plate 1;

[0041] When the screen 5 is covered on the screen plate 2, the hand wheel is rotated to rotate the screw 102, and the screw 102 is lifted and lowered in the convex slide groove 103, thereby lifting and lowering the convex slider 104, and then lifting and lowering the pressing plate 3. The pressing plate 3 descends and presses the side of the screen 5 to the gap outside the side plate 1 and the screen plate 2. The side of the screen 5 is then pressed, which assists in the quick installation of the screen 5.

[0042] The side edge of the screen 5 is located between the side surfaces of the pressing plate 3 and the screen plate 2 , and the strip plate 301 and the guide bevel 302 are located above the screen 5 , and the bottom surface of the guide bevel 302 abuts against the upper surface of the screen 5 .

[0043] A discharge channel 401 is fixed through the bottom of the feed hopper 4, and the lower part of the discharge channel 401 is located between the two pressing plates 3 and above the higher end of the sieve plate 2;

[0044] The length of the discharge channel 401 is equal to the distance between the two side plates 1, so that the discharged materials can be evenly guided onto the screen plate 2 and the screen mesh 5 without concentrated discharge.

[0045] The inner cavity of the sieve plate 2 is fixed with crisscross reinforcing steel bars 204, and the highest point of the reinforcing steel bars 204 is flush with the upper surface of the sieve plate 2, thereby enhancing the structural strength and preventing the sieve 5 from excessive deformation.

[0046] The outer right-angled side of the angle plate 202 is vertically upward, and the two outer right-angled surfaces of the angle plate 202 are inclined to the horizontal plane; the sand screened by the screen 5 slides down along the outer right-angled surfaces of the angle plate 202 without affecting the operation of the vibration motor 203.

[0047] The specific working principle of the utility model is as follows: first, install the screen 5, cover the screen 5 above the screen plate 2, rotate the hand wheel to rotate the screw 102, the screw 102 rises and falls in the convex slide groove 103, thereby lifting and lowering the convex slider 104, and then lifting and lowering the pressing plate 3, the pressing plate 3 descends, pressing the side of the screen 5 to the gap between the side plate 1 and the outside of the screen plate 2, the side of the screen 5 is pressed, and then the end of the screen 5 is fixed. At this time, the strip plate 301 and the guide bevel 302 are located above the screen 5, and the bottom surface of the guide bevel 302 abuts against the upper surface of the screen 5, and then the sand to be screened is introduced from the feed hopper 4. The discharge channel 401 at the bottom of the feed hopper 4 is a square structure, which just fits the width of the screen plate 2, so that the material can be evenly distributed on the mesh surface of the screen 5 after discharge, and the discharge channel 4 The sieve plate 2 below 01 is a solid structure. After the sand slides down along the screen 5, it can pass through the screen 5 and fall from the cavity of the sieve plate 2 after passing through the guide bevel 302. When a large amount of sand enters the sieve plate 2 and above the screen 5, it will be dispersed and pass through the guide bevels 302 under each strip plate 301. The sand passes through the gaps between a large number of guide bevels 302 and no longer slides directly down along the surface of the screen 5. Therefore, the screening time of the sand on the screen 5 is effectively extended. The guide bevels 302 under adjacent strip plates 301 are in opposite directions, which further increases the passing path of the sand and increases the screening time of the screen on the screen 5. The sand screening can be completed in one time without the need for secondary screening. Qualified sand passes through the screen 5 and falls through the inner cavity of the sieve plate 2, and unqualified sand is discharged along the mesh surface on the screen 5.

[0048] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A screening machine for sand and gravel in highway construction, comprising two side plates (1), a screen plate (2), two pressing plates (3), a feed hopper (4) and a screen (5), characterized in that: A connecting crossbeam (101) is fixed to the four corners of the opposing surfaces of the two side plates (1); the screen plate (2) is arranged obliquely between the two side plates (1); the upper surface and two side surfaces of the screen plate (2) are covered with a screen (5); a pressing plate (3) is arranged outside the two side surfaces of the screen (5); equidistantly distributed strips (301) are fixed between the opposing surfaces of the two pressing plates (3); equidistantly distributed guiding inclined blocks (302) are fixed to the bottom surface of each strip plate (301); and the guiding inclined blocks (302) at the bottom of two adjacent strip plates (301) are inclined in opposite directions and are staggered; Brackets (201) are fixed to both long sides of the bottom of the sieve plate (2); the bottom of the bracket (201) is fixed obliquely to the inner wall of the side plate (1) adjacent thereto; an angle plate (202) is fixed between the centers of the two brackets (201); and a vibration motor (203) is fixed to two inner right-angled surfaces of the angle plate (202); A feed hopper (4) is also fixed between the two side plates (1), and the feed hopper (4) is located above the higher end of the screen plate (2).

2. A screening machine for highway construction sand and gravel according to claim 1, characterized in that: The two side plates (1) are provided with symmetrically distributed convex grooves (103) on their opposite surfaces, and a convex slider (104) is slidably arranged in the convex groove (103), the upper end of the convex slider (104) is rotatably connected to a screw rod (102), and the upper end of the screw rod (102) is threadedly passed through the upper end of the side plate (1) and extends out to be fixed with a hand wheel.

3. A screening machine for highway construction sand and gravel according to claim 2, characterized in that: The raised portion of the convex sliding block (104) is fixedly connected to a clamping plate (3) adjacent thereto, and the raised portion of the convex sliding block (104) is flush with the inner wall of the side plate (1), and a side of the clamping plate (3) away from the screen plate (2) contacts the inner wall of the side plate (1).

4. A road construction sand and stone screening machine according to claim 1, characterized in that: The side edge of the screen (5) is located between the pressing plate (3) and the side surface of the screen plate (2), and the strip plate (301) and the guide bevel block (302) are located above the screen (5), and the bottom surface of the guide bevel block (302) abuts against the upper surface of the screen (5).

5. A road construction sand and stone screening machine according to claim 1, characterized in that: A discharge channel (401) is fixedly connected through the bottom of the feed hopper (4), and the lower part of the discharge channel (401) is located between the two pressing plates (3) and above the higher end of the screen plate (2).

6. A screening machine for highway construction sand and gravel according to claim 1, characterized in that: The inner cavity of the sieve plate (2) is fixed with crisscrossed reinforcing steel bars (204), and the highest point of the reinforcing steel bars (204) is flush with the upper surface of the sieve plate (2).

7. A road construction sand and stone screening machine according to claim 1, characterized in that: The outer right-angled side of the angle plate (202) is vertically facing upwards, and the two outer right-angled surfaces of the angle plate (202) are arranged at an inclination with respect to a horizontal plane.

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