Gravel aggregate grading screening equipment

Abstract

The utility model discloses gravel aggregate grading screening equipment, and relates to the technical field of building material screening. The vibrating screen comprises a screening machine, screen frames, a conveyor and a feeding hopper, the screening machine comprises two side plates, vibration exciters are fixed to the faces, away from each other, of the two side plates, the three screen frames which are distributed up and down at equal intervals and obliquely arranged are fixed between the two side plates, and three screen plates distributed at equal intervals are arranged in the screen frames; an inclined conveyor is arranged outside one end of the screening machine, the conveyor comprises two racks and a conveying belt arranged on the inner sides of the two racks in a transmission mode, a feeding hopper is arranged above the lower end of the conveyor, and a material groove is jointly formed in the side face, close to the conveyor, of the feeding hopper and the bottom face of the feeding hopper. Through the arrangement of the conveyor, the screening machine, the feeding hopper, the screening frame and the screening plate, the problems that when gravel aggregate is screened, the single-time feeding amount is too large, small-amount continuous feeding cannot be achieved, and the replacement cost of the screening plate in screening equipment is high are solved.

Description

Technical Field

[0001] This utility model belongs to the field of building material screening technology, and in particular relates to a sand and gravel aggregate grading and screening equipment. Background Technology

[0002] Sand and gravel aggregates are a general term for materials such as sand, pebbles (gravel), crushed stone, boulders, and quarries used in water conservancy projects. They are the main building materials for structures such as concrete and masonry. Aggregates with a particle size greater than 5mm are called coarse aggregates (gravel), and aggregates with a particle size less than 5mm are called fine aggregates (sand). To maximize utilization, sand and gravel aggregates cannot be used directly and need to be screened to obtain building materials such as gravel, sand, and stone powder. This maximizes resource utilization and facilitates construction. This requires the use of screening equipment. However, the following drawbacks still exist in actual sand and gravel aggregate screening operations:

[0003] Firstly, the screening of sand and gravel aggregates is mostly done using linear vibrating screens. However, these linear vibrating screens are usually too high, requiring the use of excavator buckets or other equipment to directly pour materials onto the screen. This results in excessive single-feed volume and excessive feeding height, leading to slow feeding and insufficient screening, making continuous feeding impossible.

[0004] Secondly, linear vibrating screens mostly use screen plates for screening operations. However, under long-term use, some parts will inevitably be damaged, which requires replacing the entire screen plate, resulting in excessively high overall replacement costs. Failure to replace it will seriously affect the screening efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a sand and gravel aggregate grading and screening equipment. By setting up a conveyor, screening machine, feed hopper, screen frame, and screen plate, it solves the problems of excessive single feed volume during sand and gravel aggregate screening, making it impossible to achieve small-volume continuous feeding, and the high cost of replacing screen plates in the screening equipment.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a sand and gravel aggregate grading and screening equipment, including a screening machine, a screen frame, a conveyor and a feed hopper. The screening machine includes two side plates, and a vibrator is fixed on the opposite side of the two side plates. Three screen frames are fixed between the two side plates and are arranged at an angle with equal vertical spacing. Three screen plates are arranged at equal distances inside the screen frames.

[0008] An inclined conveyor is provided at one end of the screening machine. The conveyor includes two frames and a conveyor belt with transmission set inside the two frames. The higher end of the conveyor belt extends above the highest screen frame.

[0009] A feed hopper is provided above the lower end of the conveyor, and a trough is formed on the side and bottom of the feed hopper near the conveyor.

[0010] Furthermore, symmetrically distributed columns are fixed on the side plate surfaces outside both ends of the vibrator, and a feeding hopper is fixed between the two side plates below the bottom screen frame, with a feeding port at the bottom of the feeding hopper.

[0011] Furthermore, the screen frame has three equally spaced and inverted convex mounting grooves. The screen plate is embedded in the upper part of the mounting grooves. The screen frame outside the four corners of the lower part of the mounting grooves has screw holes. The four corners of the screen plate are screwed with screws, and the tail end of the screw is screwed into the screw hole.

[0012] Furthermore, the upper surface of the sieve plate is flush with the upper surface of the sieve frame, the thickness of the sieve plate is half the thickness of the sieve frame, and the angle between the sieve frame and the horizontal plane is 5°.

[0013] Furthermore, the sieve plate has sieve holes arranged in a rectangular array, and the diameter of the sieve holes on the sieve plate decreases progressively from top to bottom in the three sieve frames.

[0014] Furthermore, a support plate is fixed to the bottom of both frames, and a baffle is fixed to the upper end of both frames, with the end of the baffle near the feed hopper contacting the outer wall of the feed hopper.

[0015] Furthermore, the feed hopper is fixed with symmetrically distributed ramps, and the upper slope of the ramps is inclined towards the feed trough. Vibration motors are fixed on both outer end faces of the feed hopper. The bottom surface of the feed hopper is an inclined surface, and the bottom surfaces of the feed hopper on both sides of the feed trough are fixed above the frame. Support columns are fixed on the bottom surfaces of both ends of the feed hopper.

[0016] This utility model has the following beneficial effects:

[0017] This invention solves the problem of excessive single-feed volume during sand and gravel aggregate screening, which prevents continuous small-batch feeding, by setting up a conveyor, screening machine, and feed hopper. It changes the conventional method of raising the excavator bucket for feeding; instead, a feed hopper is set up on the ground. Sand and gravel aggregate is added to the feed hopper using equipment such as excavator buckets or bulldozer blades. This method is no longer limited to a single feeding method. After the sand and gravel aggregate is put into the feed hopper, it falls from the trough onto the conveyor, and then is transported to the screening machine. In this way, the sand and gravel aggregate in the feed hopper is continuously transported to the screening machine by the conveyor, achieving continuous small-batch feeding and ensuring sufficient screening volume, preventing insufficient screening due to excessive single-feed volume.

[0018] This invention solves the problem of high replacement costs for screen plates in screening equipment by setting up screen frames and screen plates, where even a small breakage requires replacing the entire screen plate. Each screen frame is equipped with three screen plates, so even if one screen plate is broken and needs to be replaced, only the broken screen plate needs to be replaced, without having to replace the entire screen frame and all the screen plates on it, which greatly reduces costs. Only the corresponding screen plate needs to be replaced according to the actual location of the breakage.

[0019] This invention uses three screen frames arranged vertically, with three screen plates on each frame. The aperture of the screen plates on the three screen frames decreases progressively from top to bottom. When the sand and gravel aggregate enters the uppermost screen plate, it passes through the screen plates in the three screen frames in sequence for screening, thus achieving graded screening and obtaining aggregates of different particle sizes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 A three-dimensional diagram of a sand and gravel aggregate grading and screening device;

[0022] Figure 2 This is a structural diagram of the screening machine;

[0023] Figure 3 This is a bottom view of the screening machine;

[0024] Figure 4 This is a diagram showing the connection between the sieve frame and the sieve plate.

[0025] Figure 5 This is a structural diagram of the sieve frame;

[0026] Figure 6 This is a structural diagram of the sieve plate;

[0027] Figure 7 Here is a structural diagram of the conveyor;

[0028] Figure 8 Here is a structural diagram of the feed hopper;

[0029] Figure 9 This is a cross-sectional view of the feed hopper.

[0030] Figure label:

[0031] 1. Screening machine; 101. Side plate; 102. Column; 103. Vibrator; 104. Hopper; 1041. Discharge port; 2. Screen frame; 201. Screen plate; 2011. Screen hole; 2012. Screw; 202. Mounting groove; 203. Screw hole; 3. Conveyor; 301. Frame; 302. Support plate; 303. Conveyor belt; 304. Baffle; 4. Feed hopper; 401. Inclined ramp; 402. Vibrating motor; 403. Support column; 404. Feed trough. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0033] Please see Figure 1-9 As shown, this utility model is a sand and gravel aggregate grading and screening equipment, including a screening machine 1, a screen frame 2, a conveyor 3 and a feed hopper 4. The screening machine 1 includes two side plates 101, and a vibrator 103 is fixed on the opposite side of the two side plates 101. Three screen frames 2 are fixed between the two side plates 101 and are arranged at an angle with equal vertical spacing. Three screen plates 201 are arranged at equal distances inside the screen frames 2.

[0034] The screening machine 1, together with the screen frame 2 and screen plate 201 installed on its inner side, is used as the main screening equipment. The screen plate 201 is installed between the opposite surfaces of the two side plates 101 to form the main screening body. It works with the vibrator 103 outside the side plates 101 to generate vibration and realize the vibrating screening operation. The screen plate 201 and screen frame 2 are installed at an angle. The aggregate is thrown up and then falls down due to the vibration. It is gradually screened down along the surface of the screen plate 201 until the aggregate that cannot be screened is discharged from the lower end of the screen frame 2 and screen plate 201.

[0035] An inclined conveyor 3 is provided at one end of the screening machine 1. The conveyor 3 includes two frames 301 and a conveyor belt 303 that is driven inside the two frames 301. The higher end of the conveyor belt 303 extends above the highest screen frame 2.

[0036] A feed hopper 4 is provided above the lower end of the conveyor 3, and a trough 404 is provided on the side and bottom of the feed hopper 4 closest to the conveyor 3.

[0037] The feed hopper 4 receives the aggregate to be screened, drops it through the trough 404, and then enters the conveyor 3, which guides it onto the conveyor belt 303 between the two frames 301. The conveyor belt 303 then carries the aggregate away until it is transported to the screen plate 201 above the screen frame 2 for screening. The conveyor 3 is a conventional structure, so the remaining parts are not shown.

[0038] The vibrator 103 has symmetrically distributed columns 102 fixed on the surface of the side plates 101 outside both ends. A hopper 104 is fixed between the two side plates 101 below the bottom screen frame 2, and a discharge port 1041 is opened at the bottom of the hopper 104.

[0039] The side plate 101 is supported on the ground by the column 102. The aggregate after passing through all the screen plates 201 is usually stone powder, which is collected from the hopper 104 and then discharged from the discharge port 1041.

[0040] The screen frame 2 has three equally spaced and inverted convex mounting grooves 202. The screen plate 201 is embedded in the upper part of the mounting groove 202. The screen frame 2 at the four corners of the lower part of the mounting groove 202 is provided with screw holes 203. Screws 2012 are screwed through the four corners of the screen plate 201, and the tail end of the screw 2012 is screwed into the screw hole 203.

[0041] The upper surface of the sieve plate 201 is flush with the upper surface of the sieve frame 2 on which it is located. The thickness of the sieve plate 201 is half the thickness of the sieve frame 2. The angle between the sieve frame 2 and the horizontal plane is 5°.

[0042] When installing the screen plate 201, embed it into the upper part of the mounting groove 202, and then take four screws 2012 and screw them into the four corners of the screen plate 201 until they are screwed into the screw holes 203 in the outer screen frame 2 of the mounting groove 202, so that the upper surface of the screen plate 201 is flush with the upper surface of the screen frame 2, and the installation is completed.

[0043] The sieve plate 201 has sieve holes 2011 arranged in a rectangular array, and the diameter of the sieve holes 2011 on the sieve plate 201 in the three sieve frames 2 from top to bottom gradually decreases.

[0044] The gradual reduction of the sieve aperture 2011 enables multi-stage screening of sand and gravel aggregates, resulting in aggregates of different particle sizes. The aggregates pass through sieve plates 201 with different sieve aperture 2011 diameters, leaving aggregates of the corresponding particle size.

[0045] The bottom of both frames 301 is fixed with support plates 302, and the upper end of both frames 301 is also fixed with baffles 304. The end of the baffle 304 near the feed hopper 4 contacts the outer wall of the feed hopper 4.

[0046] The frame 301 is supported on the ground by the support plate 302. The baffle 304 is installed on the frame 301. The baffle 304 acts as a barrier to prevent the conveyor belt 303 from spilling from the side of the frame 301 when conveying aggregate, thus ensuring that the aggregate is conveyed into the screening machine 1.

[0047] The feed hopper 4 is fixed with symmetrically distributed ramps 401, and the upper slope of the ramps 401 is inclined towards the feed trough 404. Vibration motors 402 are fixed on both outer end faces of the feed hopper 4. The bottom surface of the feed hopper 4 is an inclined surface, and the bottom surfaces of the feed hopper 4 on both sides of the feed trough 404 are fixed above the frame 301. Support columns 403 are fixed on the bottom surfaces of both ends of the feed hopper 4.

[0048] The feed hopper 4 is fixedly supported by the support column 403 and placed on the ground. The aggregate is put into the feed hopper 4 and slides along the slope 401 towards the trough 404. Then it enters the conveyor 3 from the trough 404. The setting of the vibrating motor 402 prevents the aggregate in the feed hopper 4 from accumulating and falling. With the vibration of the vibrating motor 402 and the inclined plane of the slope 401, the material accumulated in the feed hopper 4 moves continuously towards the trough 404.

[0049] The specific working principle of this utility model is as follows: First, an inclined conveyor 3 is set at one end of the screening machine 1. A feed hopper 4 is set above the lower end of the conveyor 3. The feed hopper 4 is fixedly supported by the support column 403 and placed on the ground. The sand and gravel aggregate is added into the feed hopper 4 using equipment such as the excavator bucket and the bulldozer blade. It is no longer limited to a certain feeding method. After the sand and gravel aggregate is put into the feed hopper 4, it falls from the trough 404 along the slope 401 and falls into the conveyor 3. It is guided to the conveyor belt 303 between the two frames 301 and is conveyed away by the running conveyor belt 303 until it is conveyed to the screen plate 201 above the screen frame 2 for screening.

[0050] During screening, a screen frame 2 and a screen plate 201 are installed between the opposite surfaces of the two side plates 101 to form the main screening body. The vibrator 103 outside the side plates 101 generates vibration to achieve vibratory screening. The aggregate is thrown up and then falls down above the screen plate 201 due to vibration. It is gradually screened down along the surface of the screen plate 201 until the aggregate that cannot be screened is discharged from the lower end of the corresponding screen frame 2 and screen plate 201. The aggregate after passing through all the screen plates 201 is usually stone powder, which is collected in the hopper 104 and then discharged from the discharge port 1041.

[0051] Secondly, when installing the screen plate 201, embed it into the upper part of the mounting groove 202, and then take four screws 2012 and screw them into the four corners of the screen plate 201 until they are screwed into the screw holes 203 in the outer screen frame 2 of the mounting groove 202, so that the upper surface of the screen plate 201 is flush with the upper surface of the screen frame 2, and the installation is completed; when a screen plate 201 is damaged, the corresponding screen plate 201 can be removed.

[0052] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A sand and gravel aggregate classifying and sizing plant comprising a sizing machine (1), a screen frame (2), a conveyor (3) and a feed hopper (4), characterized in that: The screening machine (1) includes two side plates (101), and a vibrator (103) is fixed on the opposite side of the two side plates (101). Three screen frames (2) are fixed between the two side plates (101) and are arranged at an angle. Three screen plates (201) are arranged at an angle in the screen frames (2). An inclined conveyor (3) is provided at one end of the screening machine (1). The conveyor (3) includes two frames (301) and a conveyor belt (303) with transmission set inside the two frames (301). The higher end of the conveyor belt (303) extends above the highest screen frame (2). A feed hopper (4) is provided above the lower end of the conveyor (3), and a trough (404) is provided on the side and bottom of the feed hopper (4) near the conveyor (3).

2. The sand and gravel aggregate grading and screening equipment according to claim 1, characterized in that: The vibrator (103) has symmetrically distributed columns (102) fixed on the side plates (101) outside both ends. A hopper (104) is fixed between the two side plates (101) below the bottom screen frame (2), and a discharge port (1041) is opened at the bottom of the hopper (104).

3. A sand and aggregate sizing and sorting apparatus as claimed in claim 1, wherein: The screen frame (2) has three equally spaced and inverted convex mounting grooves (202) through it. The screen plate (201) is embedded in the upper part of the mounting groove (202). The screen frame (2) outside the four corners of the lower part of the mounting groove (202) is provided with screw holes (203). The four corners of the screen plate (201) are screwed with screws (2012), and the tail end of the screw (2012) is screwed into the screw hole (203).

4. A sand and aggregate sizing plant according to claim 3, characterised in that: The upper surface of the sieve plate (201) is flush with the upper surface of the sieve frame (2) it is located on. The thickness of the sieve plate (201) is half the thickness of the sieve frame (2). The angle between the sieve frame (2) and the horizontal plane is 5°.

5. A sand and aggregate sizing and sorting apparatus as claimed in claim 1, wherein: The sieve plate (201) has sieve holes (2011) arranged in a rectangular array, and the diameter of the sieve holes (2011) on the sieve plate (201) in the three sieve frames (2) from top to bottom gradually decreases.

6. A sand and aggregate sizing and sorting apparatus as claimed in claim 1, wherein: The bottom of both frames (301) is fixed with a support plate (302), and the upper end of both frames (301) is also fixed with a baffle (304). The end of the baffle (304) near the feed hopper (4) contacts the outer wall of the feed hopper (4).

7. A sand and aggregate sizing and sorting apparatus as claimed in claim 1, wherein: The feed hopper (4) is fixed with symmetrically distributed ramps (401), and the upper slope of the ramps (401) is inclined towards the feed trough (404). Vibration motors (402) are fixed on both outer end faces of the feed hopper (4). The bottom surface of the feed hopper (4) is an inclined surface, and the bottom surfaces of the feed hoppers (4) on both sides of the feed trough (404) are fixed above the frame (301). Support columns (403) are fixed on the bottom surfaces of both ends of the feed hopper (4).

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