Sand screening device for building construction

Abstract

The utility model discloses a sand screening device for building construction, and relates to the technical field of building engineering machinery, in particular to a sand screening device for building construction, which comprises a support assembly, the support assembly comprises a support side beam, a support front beam, a support rear beam, a support rear additional beam and a support middle beam, bearing seats are installed below the support front beam and the support rear beam, and pin through holes are formed in the middle positions of the support front beam and the support middle beam. According to the sand screening device for building construction, through cooperative arrangement of a movable screen assembly, a ball screw, an opening sleeve and a compression spring, the sand screening device for building construction has the effects of low energy consumption and high efficiency, and through cooperative arrangement of the movable screen assembly and a screen mesh, the sand screening device for building construction has the effects of being convenient to replace and low in replacement cost; and through cooperative arrangement of the movable screen assembly and the screen mesh, the sand screening device for building construction has the effect that the single-layer screen mesh can achieve grading screening.

Description

Technical Field

[0001] This utility model relates to the field of construction machinery technology, specifically a sand screening device for construction. Background Technology

[0002] A sand screening device is a mechanical device used to separate impurities or particles of different sizes from sand to achieve purification or grading. Generally, sand screening devices use a motor and an eccentric mechanism to drive the screen to reciprocate and achieve the screening function. Since the entire screen is driven at the same time, either the motor is very powerful or the screen is relatively short to work properly. This results in existing sand screening devices being either energy-intensive or inefficient. Existing screens are generally not segmented, which means that if a part of the screen is damaged, the entire screen must be replaced, which is both inconvenient to operate and costly. Because they are not segmented, a single-layer screen cannot achieve grading and screening. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the shortcomings of the existing technology, this utility model provides a sand screening device for building construction, which solves the problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: A sand screening device for construction includes a support assembly, which comprises a support side beam, a support front beam, a support rear beam, a support rear auxiliary beam, and a support middle beam. A stop block is installed above the support side beam. Bearing seats are installed below the support front beam and the support rear beam. A pin through hole is provided at the midpoint between the support front beam and the support middle beam. A movable screen assembly is placed above the support side beam. The movable screen assembly includes a screen side beam, a screen front plate, and a screen rear plate. An adjusting block is fixedly installed at the midpoint of the outer side of the screen side beam. An adjusting bolt is threadedly connected to the midpoint of the adjusting block. Both ends are connected by threaded bolts, and rollers are fitted on the outer surface of the bolts. Shaft through holes are opened at the bottom of both the front and rear screen plates. Pin holes are opened on the upper part of the front screen plate near the shaft through holes, and nail through holes are opened on both sides of the rear screen plate near the shaft through holes. A detachable screen is installed on the top of the screen side beam, the front screen plate, and the rear screen plate. A rotating shaft passing through the shaft through holes is installed between the two bearing seats. A motor that drives the rotating shaft to rotate is installed behind the auxiliary beam of the support. An open sleeve is fitted on the outer surface of the rotating shaft near the rear screen plate. A ball head screw fixed by a nut is inserted into the nail through hole. A pin fixed by a nut is inserted into the pin through hole. A compression spring is fitted on the outer surface of the pin.

[0007] Preferably, there are several movable screen assemblies with the same structure, but the depth of the front and rear screen plates and the installation height of the rollers are different, so that the screen of the later movable screen assembly is higher than the screen of the previous movable screen assembly and partially overlaps.

[0008] Preferably, the number of screens is several and the structure is the same, but the inner diameter of the holes can be different. The two sides of the screen are provided with upward baffles to prevent sand and gravel from rolling off the sides. The screen is fixedly connected to the screen side beam, the screen front plate and the screen rear plate by screws, and can be replaced by unscrewing the screws.

[0009] Preferably, the roller is connected to the stop bolt by the bearing to reduce the friction of rotation. The outer side of the roller is provided with a retaining edge and is locked on the outer side of the support side beam, so that the movable screen assembly can move back and forth on the support assembly but cannot deviate left and right.

[0010] Preferably, when the pin is inserted into the pin hole and the compression spring is compressed, the elastic force generated pushes the movable screen assembly backward. The adjusting bolt pushes the stop block backward to achieve the limit and prevent the pin from coming out of the pin hole. The further the adjusting bolt is turned backward, the more the movable screen assembly pushes the compression spring forward, and the greater the elastic force.

[0011] Preferably, the front of the open sleeve has two symmetrical slots, and each slot has a chamfer on one side. When the open sleeve rotates, the chamfer intermittently pushes the ball head screw forward, and at the same time, the movable screen assembly moves forward against the elastic force of the compression spring. When the slot rotates to the rear of the ball head screw, the elastic force of the compression spring pushes the movable screen assembly backward. The number of open sleeves is several, but the installation angle is different, so the time for each movable screen assembly to be pushed forward is different.

[0012] This utility model provides a sand screening device for construction, which has the following beneficial effects:

[0013] 1. This sand screening device for construction uses a combination of a movable screen assembly, ball head screws, open sleeves, and compression springs to achieve low energy consumption and high efficiency. The screen is divided into multiple sections and individually installed on a multi-stage movable screen assembly. Each stage of the movable screen assembly has an open sleeve and a compression spring at the front and rear. When the open sleeves rotate, the ball head screws push them forward intermittently through chamfering. Because the installation angles of each open sleeve are different, the multi-stage movable screen assembly is pushed in turn and reset by the compression springs, thus consuming little energy. Therefore, only a small-power motor is needed to move a long screen, achieving the effect of low energy consumption and high efficiency.

[0014] 2. The sand screening device for construction uses a combination of movable screen assembly and screen mesh, which makes it easy to replace and has low replacement cost. Since the screen mesh is divided into multiple sections and installed above each level of movable screen assembly, each screen mesh is small in size and easy to disassemble. When a part of the screen mesh is damaged, only the corresponding small section needs to be replaced, thus reducing the replacement cost.

[0015] 3. The sand screening device for construction uses a combination of movable screen assembly and screen mesh to achieve graded screening even with a single-layer screen. Since each screen mesh is installed independently and arranged in a straight line, a single-layer screen mesh can also be equipped with screen meshes of various aperture sizes to achieve graded screening. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the overall three-dimensional view of this utility model;

[0017] Figure 2 This is a structural schematic diagram of the main view of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the first partial cross-sectional view of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the bracket assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the movable screen assembly of this utility model;

[0021] Figure 6 This is a structural schematic diagram of the second partial cross-sectional view of the present invention.

[0022] In the diagram: 1. Support assembly; 101. Support side beam; 102. Support front beam; 103. Support rear beam; 104. Support rear auxiliary beam; 105. Support middle beam; 106. Stop block; 107. Bearing seat; 108. Pin through hole; 2. Movable screen assembly; 201. Screen side beam; 202. Screen front plate; 203. Screen rear plate; 204. Adjusting block; 205. Adjusting bolt; 206. Plunging bolt; 207. Roller; 208. Shaft through hole; 209. Pin hole; 210. Pin through hole; 211. Screen mesh; 3. Rotating shaft; 4. Motor; 5. Opening sleeve; 501. Groove; 502. Chamfer; 6. Ball head screw; 7. Pin; 8. Compression spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1 to 6This utility model provides a technical solution: a sand screening device for construction, comprising a support assembly 1 welded from rectangular steel pipes and steel plates. The support assembly 1 includes a side beam 101, a front beam 102, a rear beam 103, a rear auxiliary beam 104, and a middle beam 105. A stop block 106 is installed above the side beam 101, the stop block 106 being wider at the bottom and narrower at the top, and its bottom is fixedly connected to the side beam 101 by welding. Bearing seats 107 are installed below the front beam 102 and the rear beam 103. A pin hole 108 is opened at the middle position between the front beam 102 and the middle beam 105. A movable screen assembly 2 is placed above the side beam 101. The movable screen assembly 2 is mainly welded from steel pipes and steel plates. The movable screen assembly 2 includes a screen side beam 201, a screen front plate 202, and a screen rear plate 203. An adjusting block 204 is fixedly installed at the middle position of the outer side of the screen side beam 201. An adjusting bolt 205 is threadedly connected to the middle position of the adjusting block 204. Threaded bolts 206 are threaded to both ends of the outer side of the screen side beam 201. Rollers 207 are fitted onto the outer surface of the threaded bolts 206. Shaft through holes 208 are provided below the screen front plate 202 and the screen rear plate 203. A pin hole 209 is provided above the shaft through hole 208 on the screen front plate 202. Pin through holes 210 are provided on both sides of the screen rear plate 203 near the shaft through hole 208. A detachable screen mesh 211 is installed above the screen side beam 201, the screen front plate 202, and the screen rear plate 203. Several screens 211 are identical in structure, but the depths of the front screen plate 202 and the rear screen plate 203, as well as the installation height of the rollers 207, differ. This causes the screen 211 of the later movable screen assembly 2 to be higher than the screen 211 of the earlier movable screen assembly 2, and they partially overlap, allowing the sand and gravel on the later screen 211 to roll smoothly onto the earlier screen 211. Several screens 211 are identical in structure, but the inner diameter of the perforations can differ, thus allowing for different screening effects at different points on a single screen. Upward-facing guardrails are provided on both sides of the screen 211 to prevent sand and gravel from rolling off the sides. The screen 211 is fixedly connected to the screen side beam 201, the front screen plate 202, and the rear screen plate 203 by screws, and can be replaced by unscrewing the screws. Each screen 211 is installed independently, facilitating replacement. The rollers 207 are... The bearing is connected to the bolt 206 to reduce rotational friction. The outer side of the roller 207 is provided with a retaining edge and is locked onto the outer side of the support side beam 101, allowing the movable screen assembly 2 to move back and forth on the support assembly 1 but not to shift left and right. A rotating shaft 3 is installed between the two bearing seats 107, passing through the shaft through hole 208. A motor 4 that drives the rotating shaft 3 to rotate is installed behind the support rear auxiliary beam 104. An open sleeve 5 is fitted onto the outer surface of the rotating shaft 3 near the rear plate 203 of the screen. A ball head screw 6, fixed by a nut, is inserted into the pin through hole 210. A pin 7, fixed by a nut, is inserted into the pin through hole 108. A compression spring 8 is fitted onto the outer surface of the pin 7. The pin 7 is inserted into the pin hole 209, and the elastic force generated when the compression spring 8 is compressed pushes the movable screen assembly 2 backward.Adjusting bolt 205 pushes back against stop block 106 to limit movement and prevent pin 7 from dislodging from pin hole 209. The further the adjusting bolt 205 is tightened, the more the movable screen assembly 2 compresses the compression spring 8, resulting in greater elastic force. Two symmetrical slots 501 are provided at the front of the opening sleeve 5. Each slot 501 has a chamfer 502 on one side. When the opening sleeve 5 rotates, the chamfer 502 intermittently pushes the ball head screw 6 forward, while the movable screen assembly 2 moves forward against the elastic force of the compression spring 8. When the slot 501 rotates behind the ball head screw 6, the elastic force of the compression spring 8 pushes the movable screen assembly 2 backward. The number of opening sleeves 5 is several, but their installation angles are different, resulting in different times for each movable screen assembly 2 to be pushed forward.

[0025] In use, first, install the support assembly 1 on the ground at a certain angle, with the legs lower in the front and higher in the back. Then, fix the pin 7 in the pin hole 209 with a nut. Next, place the compression spring 8 on the outer surface of the pin 7. Then, install the movable screen assembly 2 at the front end of the support assembly 1, near the rear and above the front pin 7, ensuring the pin 7 is inserted into the pin hole 209. Next, tighten the adjusting bolt 205 backward to move it backward and press against the stop block 106. Further tightening of the adjusting bolt 205 will allow the movable screen assembly 2 to move forward against the spring force of the compression spring 8. At this time, the compression spring 8 pushes the movable screen assembly 2 backward and presses against the stop block 106. During this process, the four rollers 20 around the movable screen assembly 2... 7 needs to contact the upper surface of the support assembly 1. If the spring force of the compression spring 8 is too great and causes the movable screen assembly 2 to tilt upwards, then the movable screen assembly 2 and the support assembly 1 can be tied together with steel wire. In this way, all the movable screen assemblies 2 are installed from front to back. Then, the rotating shaft 3 is passed through all the shaft through holes 208 below the movable screen assembly 2 and fixed between the front and rear bearing seats 107. During this process, the open sleeve 5 should also be put on the rotating shaft 3 at the same time. Then, the distance of the adjusting bolt 205 is readjusted, that is, the position of one movable screen assembly 2 between the pin 7 and the stop block 106 is changed. For example, the frontmost movable screen assembly 2 is pushed to the front by the adjusting bolt 205, while the rearmost movable screen assembly 2 is pushed to the back by the compression spring 8. Then the middle Several movable screen assemblies 2 in intermediate positions are progressively advanced between the foremost and rearmost ends, further fixing the opening sleeve 5 close to the ball head screw 6. The foremost movable screen assembly 2 has been pushed to the front by the adjusting bolt 205, so the end face of the opening sleeve 5 rests against the top of the ball head screw 6. The rearmost movable screen assembly 2 has been pushed to the rear by the compressed spring 8, so the ball head of the ball head screw 6 is fully inserted into the slot 501 of the opening sleeve 5. The several movable screen assemblies 2 in the middle positions are progressively advanced between the foremost and rearmost ends, so the ball head of the ball head screw 6 rests against the chamfered surface 502. When fixing the opening sleeve 5, first tighten all the surrounding screws, then unscrew one screw and drill a hole in the rotating shaft 3 through the screw hole, then replace... Tighten the pointed screws again, or tighten all the screws and then fix the tail of the opening sleeve 5 to the rotating shaft 3 by electric welding. Further adjust the position of the adjusting bolt 205 so that the movable screen assembly 2 has sufficient movement distance between the compression spring 8 and the stop block 106, but the pin 7 must never disengage from the pin hole 209. Finally, install the motor 4 to drive the rotating shaft 3 to rotate at a constant speed. At this time, because the installation angle of the opening sleeve 5 is different, the time it takes for the movable screen assembly 2 at different positions to be pushed forward is also different. Therefore, when the motor 4 is working, all the movable screen assemblies 2 are alternately pushed forward and then reset by the compression spring 8. Finally, install the screen 211 as needed. In the end, the sand screening device is spliced ​​together by multiple stages of rotating screens 211.Because the multiple screens 211 are independent of each other, their small size also makes them easy to replace and maintain.

[0026] In summary, this sand screening device for construction uses a multi-section screen 211, which is individually installed on a multi-stage movable screen assembly 2. Each stage of the movable screen assembly 2 is equipped with an open sleeve 5 and a compression spring 8 at the front and rear. When the open sleeve 5 rotates, it is pushed forward intermittently by the ball head screw 6 through the chamfer 502. Since the installation angles of each open sleeve 5 are different, the multi-stage movable screen assembly 2 is pushed in turn and reset backward by the compression spring 8, thus consuming little energy. Therefore, only a small-power motor 4 is needed to move the long screen 211, thus achieving the effect of low energy consumption and high efficiency. Since the screen 211 is divided into multiple sections and installed above each stage of the movable screen assembly 2, each screen 211 is small in size and easy to disassemble. Since only the corresponding small section needs to be replaced when the screen 211 is partially damaged, the replacement cost is low. Since each screen 211 is installed independently and arranged in a straight line, a single layer of screen 211 can also be equipped with screens 211 of various aperture sizes to achieve graded screening.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sand screening device for construction, comprising a support assembly (1), characterized in that: The bracket assembly (1) includes a bracket side beam (101), a bracket front beam (102), a bracket rear beam (103), a bracket rear auxiliary beam (104), and a bracket middle beam (105). A stop block (106) is installed above the bracket side beam (101). Bearing seats (107) are installed below the bracket front beam (102) and the bracket rear beam (103). A pin through hole (108) is opened at the middle position between the bracket front beam (102) and the bracket middle beam (105). A movable screen assembly (2) is placed above the beam (101). The movable screen assembly (2) includes a screen side beam (201), a screen front plate (202), and a screen rear plate (203). An adjusting block (204) is fixedly installed at the middle position of the outer side of the screen side beam (201). An adjusting bolt (205) is threadedly connected to the middle position of the adjusting block (204). Plug bolts (206) are threadedly connected to both ends of the outer side of the screen side beam (201). The outer surface of the plug bolts (206) is... Rollers (207) are fitted onto the screen. Shaft through holes (208) are provided below both the front screen plate (202) and the rear screen plate (203). Pin holes (209) are provided above the shaft through holes (208) on the front screen plate (202). Nail through holes (210) are provided on both sides of the rear screen plate (203) near the shaft through holes (208). A detachable screen (211) is installed above the screen side beam (201), the front screen plate (202), and the rear screen plate (203). Two bearing seats (10...) 7) A rotating shaft (3) is installed between the shaft through hole (208). A motor (4) that drives the rotating shaft (3) to rotate is installed behind the auxiliary beam (104) of the support. An open sleeve (5) is fitted on the outer surface of the rotating shaft (3) near the screen back plate (203). A ball head screw (6) fixed by a nut is inserted into the nail through hole (210). A pin (7) fixed by a nut is inserted into the pin through hole (108). A compression spring (8) is fitted on the outer surface of the pin (7).

2. The sand screening device for building construction according to claim 1, characterized in that: There are several movable screen assemblies (2) with the same structure, but the depth of the front screen plate (202) and the rear screen plate (203) and the installation height of the roller (207) are different, so that the screen (211) of the latter movable screen assembly (2) is higher than the screen (211) of the former movable screen assembly (2) and partially overlaps.

3. The sand screening device for building construction according to claim 1, characterized in that: The number of screens (211) is the same, but the inner diameter of the holes can be different. The screens (211) have upward-facing guards on both sides to prevent sand and gravel from rolling off the sides. The screens (211) are fixedly connected to the screen side beam (201), the screen front plate (202) and the screen rear plate (203) by screws, and can be replaced by unscrewing the screws.

4. The sand screening device for building construction according to claim 1, characterized in that: The roller (207) is connected to the bolt (206) through the bearing to reduce the friction of rotation. The outer side of the roller (207) is provided with a retaining edge and is locked on the outer side of the side beam (101) of the support, so that the movable screen assembly (2) can move back and forth on the support assembly (1) but cannot deviate to the left or right.

5. The sand screening device for building construction according to claim 1, characterized in that: When the pin (7) is inserted into the pin hole (209) and the spring (8) is compressed, the elastic force generated will push the movable screen assembly (2) backward. The adjusting bolt (205) pushes the stop block (106) backward to achieve the limit and prevent the pin (7) from falling out of the pin hole (209). The more the adjusting bolt (205) is turned backward, the more the movable screen assembly (2) squeezes the compression spring (8) forward, and the greater the elastic force.

6. The sand screening device for building construction according to claim 1, characterized in that: Two symmetrical slots (501) are provided in front of the opening sleeve (5). Each slot (501) has a chamfer (502) on one side. When the opening sleeve (5) rotates, the chamfer (502) intermittently pushes the ball head screw (6) forward. At the same time, the movable screen assembly (2) moves forward against the elastic force of the compression spring (8). When the slot (501) rotates to the back of the ball head screw (6), the elastic force of the compression spring (8) pushes the movable screen assembly (2) backward. The number of opening sleeves (5) is several, but the installation angle is different, so the time when each movable screen assembly (2) is pushed forward is different.

Images