Fine sand screening device for building construction

Abstract

The utility model discloses a fine sand screening device for building construction, and relates to the field of building construction, the fine sand screening device for building construction comprises a spiral conveyer, an outer frame, a vibrating mechanism, a supporting frame and two springs, the supporting frame comprises a lower fixing seat and four stand columns, a transverse support and a guide rod are welded and fixed between the left stand column and the right stand column, the guide rod is arranged above the transverse support, and the lower fixing seat is fixedly connected with the outer frame. According to the sand screening device, the spiral conveyor is adopted, sand enters the spiral conveyor through the feeding hopper, the spiral conveyor automatically conveys the sand to the splayed screening plate to be screened, the screening efficiency is greatly improved, the screening efficiency is improved, and the labor intensity of workers is reduced. A worker only needs to push sand on a sand pile into the feeding hopper, repeated physical actions of lifting and dumping are not needed, the labor intensity of the worker is greatly reduced, meanwhile, the feeding and screening efficiency is improved, and the construction progress is accelerated.

Description

Technical Field

[0001] This utility model belongs to the field of building construction, and specifically relates to a fine sand screening device for building construction. Background Technology

[0002] In construction, fine sand is an important basic building material, widely used in concrete mixing, mortar preparation, and foundation treatment. The particle size distribution and mud content of fine sand have a significant impact on project quality. If large particles or coarse aggregates are mixed into the fine sand, it may lead to porosity or uneven strength in the concrete after molding, and even cause potential quality problems. Therefore, effective sieving of sand to obtain sand that meets standards is one of the key steps in ensuring the quality of construction projects.

[0003] When feeding materials into a traditional screening device, workers need to repeatedly dig sand from the sand pile with shovels, lift the shovels above the screen with their arms, and then dump the sand. Workers need to repeat the physical actions of digging, lifting, and dumping sand for a long time, which can easily cause worker fatigue and affect the construction progress. In addition, the planar design of traditional screens can easily cause sand to accumulate, resulting in large particles or coarse aggregates accumulating in the middle of the screen, reducing screening efficiency.

[0004] Therefore, we propose a fine sand screening device for construction to solve the above problems. Utility Model Content

[0005] To address the issue that traditional screening devices require workers to perform repetitive physical tasks such as digging, lifting, and dumping sand for extended periods, which can easily lead to worker fatigue and affect construction progress, and that the planar design of traditional screens can easily cause sand accumulation, resulting in large particles or coarse aggregates accumulating in the middle of the screen and reducing screening efficiency, this utility model provides a fine sand screening device for construction.

[0006] The solution adopted by this utility model to solve its technical problem is: a fine sand screening device for construction, including a screw conveyor, an outer frame, a vibration mechanism, a support frame and two springs. The support frame includes a lower fixed seat and four columns. A cross brace and a guide rod are welded and fixed between the left and right columns. The guide rod is set above the cross brace. The lower fixed seat is welded and fixed between the two columns on the left side. A support seat is welded and fixed on the left side of the lower fixed seat.

[0007] An eight-shaped sieve plate for screening sand is fixedly installed inside the outer frame. Two sliding sleeves are welded and fixed on the front and rear sides of the sieve plate, which are fitted onto the guide rod and can slide along the guide rod.

[0008] The two springs are respectively sleeved on the two guide rods, and the springs are fixedly installed between the sliding sleeve and the column;

[0009] The bottom of the screw conveyor is fixedly installed on the support base. Its inlet is equipped with a feed hopper, and its outlet is equipped with a discharge pipe. The lower end of the discharge pipe corresponds to the figure-eight screen plate.

[0010] The vibration mechanism includes a drive assembly and a rotating shaft. The rotating shaft is rotatably mounted on a support base, and a cam is fitted on its top end. The cam contacts the outer frame.

[0011] The drive component is connected to the shaft and can drive the shaft to rotate.

[0012] Preferably, an upper fixing seat is provided above the lower fixing seat, and the upper fixing seat is welded and fixed between the two columns on the left side.

[0013] Preferably, a U-shaped seat is welded and fixed to the left side of the upper fixed seat, the opening of the U-shaped seat is fixedly connected to the outer side of the screw conveyor, a bearing II is installed inside the U-shaped seat, and the rotating shaft is set inside the bearing II.

[0014] Preferably, the drive assembly includes a large synchronous pulley and a small synchronous pulley. The screw shaft of the screw conveyor passes through the bottom cover bearing and is fitted with the large synchronous pulley. The small synchronous pulley is fitted at the lower end of the shaft. The large synchronous pulley and the small synchronous pulley are connected by a synchronous belt drive.

[0015] Preferably, the drive component is a geared motor installed at the bottom of the support base, and the output shaft of the geared motor is connected to the lower end of the rotating shaft.

[0016] Preferably, two guide plates are fixedly installed at the bottom of the outer frame, and the two guide plates are arranged in an inverted V-shape, one in front of the other.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model adopts a screw conveyor. The sand enters the screw conveyor through the feed hopper and is automatically transported to the herringbone screen plate for screening. Workers only need to push the sand on the sand pile into the feed hopper. There is no need for repeated lifting and dumping physical actions, which greatly reduces the labor intensity of workers, improves the efficiency of feeding and screening, and speeds up the construction progress.

[0019] 2. This utility model adopts an eight-shaped sieve plate design, which allows the sand to naturally disperse and flow during vibration, avoiding the problem of central accumulation that is easily caused by flat sieves, and ensuring the screening efficiency of fine sand.

[0020] 3. This utility model uses a synchronous belt to drive the small synchronous pulley at the lower end of the rotating shaft, so that when the screw conveyor is conveying sand, it synchronously drives the rotating shaft to rotate and drives the cam to operate. It can realize the vibration function of the outer frame and the V-shaped screen plate without the need for an additional power source, realizing the synchronous operation of conveying and screening. Only a single power input is needed to complete the two-stage operation, reducing energy consumption and simplifying the equipment structure. Attached Figure Description

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0022] Figure 2 This is the second three-dimensional structural schematic diagram of the present utility model.

[0023] In the diagram: 1. Screw conveyor, 11. Feed hopper, 12. Discharge pipe, 21. Column, 22. Horizontal brace, 23. Lower fixed seat, 24. Upper fixed seat, 25. Guide rod, 3. U-shaped seat, 41. Large synchronous pulley, 42. Synchronous belt, 43. Small synchronous pulley, 5. Rotary shaft, 6. Cam, 7. Spring, 81. Outer frame, 82. Guide plate, 83. V-shaped screen plate, 84. Sliding sleeve, 9. Support seat. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figure 1-2 This utility model provides a technical solution for a fine sand screening device for construction:

[0026] Example 1:

[0027] according to Figure 1 and Figure 2 As shown, it includes a screw conveyor 1, an outer frame 81, a vibration mechanism, a support frame, and two springs 7. The support frame includes a lower fixed seat 23 and four columns 21. A cross brace 22 and a guide rod 25 are welded and fixed between the left and right columns 21. The guide rod 25 is located above the cross brace 22. The lower fixed seat 23 is welded and fixed between the two columns 21 on the left side. A support seat 9 is welded and fixed to the left side of the lower fixed seat 23.

[0028] An eight-shaped screen plate 83 for screening sand is fixedly installed inside the outer frame 81. By adopting the design of the eight-shaped screen plate 83, the sand is naturally dispersed and flows during vibration, avoiding the central accumulation problem that is easy to occur in flat screens, and ensuring the screening efficiency of fine sand. Two sliding sleeves 84 are welded and fixed on the front and rear sides of the outer frame 81, respectively. The sliding sleeves 84 are fitted on the guide rod 25, and the guide rod 25 provides a precise sliding track for the sliding sleeves 84, so that the sliding sleeves 84 can slide along the guide rod 25. Two guide plates 82 are fixedly installed at the bottom of the outer frame 81. The two guide plates 82 are arranged in an inverted eight-shape, one in front of the other, so that the screened fine sand falls into the receiving hopper under the action of the two guide plates 82.

[0029] Two springs 7 are respectively sleeved on two guide rods 25, and the springs 7 are fixedly installed between the sliding sleeve 84 and the column 21.

[0030] The bottom end of the screw conveyor 1 is fixedly installed on the support base 9. Its inlet is equipped with a feed hopper 11, and its outlet is equipped with a discharge pipe 12. The lower end of the discharge pipe 12 corresponds to the figure-eight screen plate 83. By using the screw conveyor 1, the sand enters the screw conveyor 1 through the feed hopper 11. The screw conveyor 1 automatically transports the sand to the figure-eight screen plate 83 for screening. Workers only need to push the sand on the sand pile into the feed hopper 11. There is no need for repeated lifting and dumping physical actions, which greatly reduces the labor intensity of workers and improves the efficiency of feeding and screening, thus speeding up the construction progress.

[0031] The vibration mechanism includes a drive assembly and a rotating shaft 5. The lower section of the rotating shaft 5 is fitted with a bearing 1, which is mounted on a support base 9. The top of the rotating shaft 5 is fitted with a cam 6, which contacts the outer frame 81. When the cam 6 rotates, its specific profile shape contacts the outer frame 81 and pushes the outer frame 81 to move.

[0032] The drive assembly includes a large synchronous pulley 41 and a small synchronous pulley 43. The screw shaft of the screw conveyor 1 passes through the bottom cover bearing and is fitted with the large synchronous pulley 41. The small synchronous pulley 43 is fitted at the lower end of the rotating shaft 5. The large synchronous pulley 41 and the small synchronous pulley 43 are connected by a synchronous belt 42. The synchronous belt 42 is connected to the small synchronous pulley 43 at the lower end of the rotating shaft 5, so that when the screw conveyor 1 is conveying sand, it synchronously drives the rotating shaft 5 to rotate and drive the cam 6 to operate. The vibration function of the outer frame 81 and the V-shaped screen plate 83 can be realized without an additional power source, realizing the synchronous operation of conveying and screening. Only a single power input is needed to complete the two-stage operation, reducing energy consumption and simplifying the equipment structure.

[0033] In practical use, the fine sand screening device for construction of this utility model first pushes the receiving hopper car to the bottom of the figure-eight screen plate 83, then starts the screw conveyor 1 and pushes the sand on the sand pile into the feeding hopper 11. Under the conveying action of the screw conveyor 1, the sand falls onto the figure-eight screen plate 83 through the discharge pipe 12.

[0034] Meanwhile, when the screw conveyor 1 is running, its screw shaft drives the large synchronous wheel 41 to rotate. The large synchronous wheel 41 is connected to the small synchronous wheel 43 through the synchronous belt 42, which drives the rotating shaft 5 to rotate. The cam 6 at the top of the rotating shaft 5 periodically pushes the outer frame 81 as it rotates, causing the outer frame 81 to slide horizontally along the guide rod 25. The spring 7 assists in resetting, forming continuous vibration. The sand is naturally dispersed and flows on the V-shaped screen plate 83 due to the vibration. Fine sand falls through the screen holes into the receiving hopper, while coarse sand slides along the inclined surface of the V-shaped screen plate 83 to the edge.

[0035] After the receiving hopper is full, the screw conveyor 1 is stopped, the receiving hopper is moved to the mixing area, and the coarse sand or large particles on the figure-eight screen plate 83 are cleaned.

[0036] Example 2:

[0037] Based on Example 1, such as Figure 1 and Figure 2 As shown, an upper fixed seat 24 is provided above the lower fixed seat 23. The upper fixed seat 24 is welded and fixed between the two columns 21 on the left side. A U-shaped seat 3 is welded and fixed on the left side of the upper fixed seat 24. The opening of the U-shaped seat 3 is fixedly connected to the outer side of the screw conveyor 1. A bearing 2 is installed inside the U-shaped seat 3, and the rotating shaft 5 is set inside the bearing 2. The U-shaped seat 3 further supports the screw conveyor 1 and the rotating shaft 5, thereby improving the stability of the screw conveyor 1 and the rotating shaft 5 during use.

[0038] Example 3:

[0039] Based on Embodiment 1, the difference is as follows: the drive component is a geared motor installed at the bottom of the support base 9, and the output shaft of the geared motor is connected to the lower end of the rotating shaft 5.

Claims

1. A fine sand screening device for construction, comprising a screw conveyor, an outer frame, a vibration mechanism, a support frame, and two springs, characterized in that: The support frame includes a lower fixed seat and four columns. A cross brace and a guide rod are welded and fixed between the two columns on the left and right sides. The guide rod is set above the cross brace. The lower fixed seat is welded and fixed between the two columns on the left side. A support seat is welded and fixed to the left side of the lower fixed seat. An eight-shaped sieve plate for screening sand is fixedly installed inside the outer frame. Two sliding sleeves are welded and fixed on the front and rear sides of the sieve plate, which are fitted onto the guide rod and can slide along the guide rod. The two springs are respectively sleeved on the two guide rods, and the springs are fixedly installed between the sliding sleeve and the column; The bottom of the screw conveyor is fixedly installed on the support base. Its inlet is equipped with a feed hopper, and its outlet is equipped with a discharge pipe. The lower end of the discharge pipe corresponds to the figure-eight screen plate. The vibration mechanism includes a drive assembly and a rotating shaft. The rotating shaft is rotatably mounted on a support base, and a cam is fitted on its top end. The cam contacts the outer frame. The drive component is connected to the shaft and can drive the shaft to rotate.

2. The fine sand screening device for construction as described in claim 1, characterized in that: An upper fixing seat is provided above the lower fixing seat, and the upper fixing seat is welded and fixed between the two columns on the left side.

3. The fine sand screening device for construction as described in claim 2, characterized in that: A U-shaped seat is welded and fixed to the left side of the upper fixed seat. The opening of the U-shaped seat is fixedly connected to the outer side of the screw conveyor. A bearing is installed inside the U-shaped seat, and the rotating shaft is set inside the bearing.

4. The fine sand screening device for construction as described in claim 1, characterized in that: The drive assembly includes a large synchronous pulley and a small synchronous pulley. The screw shaft of the screw conveyor passes through the bottom cover bearing and is fitted with the large synchronous pulley. The small synchronous pulley is fitted at the lower end of the shaft. The large synchronous pulley and the small synchronous pulley are connected by a synchronous belt drive.

5. The fine sand screening device for construction as described in claim 1, characterized in that: The drive component is a geared motor installed at the bottom of the support base, and the output shaft of the geared motor is connected to the lower end of the rotating shaft.

6. The fine sand screening device for construction as described in claim 1, characterized in that: Two guide plates are fixedly installed at the bottom of the outer frame, and the two guide plates are arranged in an inverted V-shape, one in front of the other.

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