Sand screening device for building construction
By using sand screening devices with uniformly distributed structures and dispersed structures in construction, the problem of insufficient feed uniformity of existing equipment is solved, screening efficiency and project quality are improved, and the service life of the screen is extended.
Patent Information
- Application Number
- CN202520759988.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2035-04-22
AI Technical Summary
The sand screening equipment used in existing construction construction has insufficient feed uniformity, resulting in low screening efficiency and poor project quality.
A sand screening device for construction was designed, adopting a uniform structure and a dispersed structure. The uniform structure evenly distributed the sand on the screen through a motor-driven turntable and a uniform rod. The dispersed structure guides the sand to the side position of the screen through a dispersed plate and counterweight block to avoid local accumulation.
By evenly distributing and dispersing the sand material, the screening efficiency and engineering quality are improved, and the service life of the screen is extended.
Smart Images
Figure CN222919097U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building construction, and particularly provides a sand screening device for building construction. Background Technique
[0002] In building construction, sand screening is one of the core links to ensure the quality of engineering materials. Its main purposes include removing impurities to ensure the purity of aggregates, grading screening to meet the requirements of the uniformity of sand particles for concrete mortar, etc., and enhancing the strength and durability of concrete structures. The currently widely used sand screening equipment in building construction has the defect of insufficient feeding uniformity, which directly affects the screening efficiency and engineering quality. Traditional equipment generally uses a simple funnel or belt for feeding, which easily causes sand to accumulate in local areas of the screen mesh, resulting in uneven load on the screen mesh. Local overload of the screen mesh will accelerate wear and even splitting, and at the same time will cause low screening efficiency and affect the work progress. Therefore, a sand screening device for building construction is needed. Content of the Utility Model
[0003] To solve the above problems, the utility model provides a sand screening device for building construction.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a sand screening device for building construction, including a housing, an expansion cavity, a uniform distribution structure, a feeding port, a dispersion structure, a primary screen mesh and a secondary screen mesh. The inner cavity of the housing is symmetrically provided with expansion cavities. The lower surfaces of the inner cavities of the two expansion cavities are both equipped with motors, and the uniform distribution structure is fixedly installed at the output end of the motors. The upper surface of the housing is provided with a feeding port, and the lower end of the feeding port is equipped with a dispersion structure. The primary screen mesh and the secondary screen mesh are both fixedly installed in the housing, and the secondary screen mesh is located below the primary screen mesh. Both the primary screen mesh and the secondary screen mesh are inclined, and the lower end of the primary screen mesh is above the upper end of the secondary screen mesh. The primary screen mesh is located below the uniform distribution structure;
[0005] The uniform distribution structure includes a turntable and uniform distribution rods. The turntable is fixedly installed at the output end of the motor. The motor is arranged at an inclination of 45°. The three uniform distribution rods are evenly fixedly installed on the outer surface of the turntable;
[0006] The dispersion structure includes side plates, a dispersion plate, lower limit blocks and upper limit rods. The two side plates are fixedly installed on the left and right at the lower end of the feeding port. A fixed shaft is fixedly installed front and back between the two side plates, and the dispersion plate is sleeved on the fixed shaft. Two groups of lower limit blocks and upper limit rods are symmetrically fixedly installed front and back between the two side plates, and the inner end of the dispersion plate is located between the lower limit blocks and the upper limit rods.
[0007] Furthermore, the mesh number of the primary screen mesh is less than that of the secondary screen mesh.
[0008] Further, the uniform distribution rod includes a bent section and a straight section. One end of the bent section is mounted on the turntable, and the straight section is integrally formed at the other end of the bent section. The straight section forms a 45° angle with the main shaft of the motor. A partition is fixedly installed on the lower surface of the inner cavity of the expansion chamber. The partition is located inside the motor, and the inner surface of the partition is coplanar with the inner wall of the housing. An opening is provided on the upper surface of the partition.
[0009] Further, a pushing plate is fixedly installed on the outer surface of the straight section of the uniform distribution rod.
[0010] Further, a counterweight is fixedly installed on the lower surface of the outer end of the dispersion plate.
[0011] Further, the outer end face of the dispersion plate is an inclined plane.
[0012] Further, a material guiding plate is provided on the inner wall of the housing. The material guiding plate is located between the first-stage screen and the second-stage screen and is parallel to the first-stage screen. The upper end of the material guiding plate is fixedly installed on the inner wall of the housing, and a blanking opening is left between the lower end of the material guiding plate and the inner wall of the housing.
[0013] Further, a support plate is fixedly installed between the lower surface of the material guiding plate and the inner wall of the housing.
[0014] The beneficial effects of using the present utility model are as follows:
[0015] A uniform distribution structure is provided below the feeding port of the present utility model. When the sand material falls onto the screen, the operation of the uniform distribution structure will periodically push the sand material, evenly distributing the falling sand material on the screen, avoiding local accumulation, protecting the screen, and at the same time, after the sand material is evenly distributed, the screen can perform a more effective screening operation, improving work efficiency.
[0016] A dispersion structure is designed at the feeding port of the present utility model, which can guide some of the incoming sand material to the side position of the screen, avoiding a large amount of sand material directly falling onto the same position of the screen. In cooperation with the uniform distribution structure, the dispersion of the sand material is completed together, effectively improving the screening efficiency and screening effect. Description of the Drawings
[0017] Figure 1 is the front view cross-sectional view of the present utility model.
[0018] Figure 2 is the present utility model Figure 1 the cross-sectional view in the A-A direction.
[0019] Figure 3 is the three-dimensional schematic diagram of the uniform distribution structure of the present utility model.
[0020] Figure 4 is the bottom view of the dispersion structure of the present utility model.
[0021] Figure 5 For the present utility model Figure 2 is a partial enlarged view of part a in the present utility model.
[0022] Figure 6 is a three-dimensional schematic diagram of the dispersion plate of the present utility model.
[0023] Reference numerals include: 1, housing; 2, expansion chamber; 21, partition board; 3, uniform distribution structure; 31, turntable; 32, uniform distribution rod; 33, pushing plate; 4, feeding port; 5, dispersion structure; 51, side plate; 52, fixed shaft; 53, dispersion plate; 54, counterweight block; 55, lower limit block; 56, upper limit rod; 6, primary screen; 7, secondary screen; 8, guide plate; 81, support plate. Specific embodiments
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0025] Referring to Figures 1 to 6 , a sand screening device for building construction includes a housing 1, an expansion chamber 2, a uniform distribution structure 3, a feeding port 4, a dispersion structure 5, a primary screen 6 and a secondary screen 7. Expansion chambers 2 are symmetrically arranged on the front and rear surfaces of the inner cavity of the housing 1. Motors are assembled on the lower surfaces of the inner cavities of the two expansion chambers 2, and the uniform distribution structure 3 is fixedly installed at the output end of the motor. A feeding port 4 is arranged on the upper surface of the housing 1, and a dispersion structure 5 is assembled at the lower end of the feeding port 4. The primary screen 6 and the secondary screen 7 are both fixedly installed in the housing 1, and the secondary screen 7 is located below the primary screen 6. Both the primary screen 6 and the secondary screen 7 are inclined, and the lower end of the primary screen 6 is above the upper end of the secondary screen 7. The primary screen is located below the uniform distribution structure 3.
[0026] As Figure 1 shown, the two expansion chambers 2 are symmetrically arranged on the front and rear surfaces of the inner cavity of the housing 1. The interior of the expansion chamber 2 is used to arrange the motor and the uniform distribution structure 3, and the expansion chamber 2 is communicated with the internal space of the housing 1.
[0027] The uniform distribution structure 3 is used to push and disperse the sand material falling on the primary screen 6, avoid local accumulation of the sand material on the primary screen 6, realize the protection of the primary screen 6, and at the same time disperse the sand material, which can improve the screening efficiency and screening effect of the sand material.
[0028] The dispersion structure 5 is used to divert and disperse the sand material falling from the feed inlet 4, guiding part of the sand material to both sides and falling to both sides of the primary sieve 6, avoiding all the sand material falling on the same position of the primary sieve 6, reducing the local pressure on the primary sieve 6, and cooperating with the uniform distribution structure 3 to jointly complete the dispersion treatment of the sand material.
[0029] Vibration motors are installed on the outer wall of the housing 1, which are respectively used to drive the primary sieve 6 and the secondary sieve 7 to vibrate.
[0030] Specifically, the mesh number of the primary sieve 6 is less than that of the secondary sieve 7. The primary sieve 6 is a coarse sieve, mainly used to screen out large particle impurities. The secondary sieve 7 is a fine sieve, which can screen out two kinds of sand materials with different particle sizes, improving the screening effect.
[0031] The inclined settings of the primary sieve 6 and the secondary sieve 7 can guide the movement of the sand material. A first discharge port corresponding to the primary sieve 6 and a second discharge port corresponding to the secondary sieve 7 are respectively arranged on the outer wall of the housing 1, which are respectively used to collect the sand material that has not passed through the primary sieve 6 and the secondary sieve 7. An opening is arranged at the lower side position of the housing 1, and a collection box can be placed to collect the sand material screened out by the secondary sieve 7.
[0032] In practice, the number or mesh number of the sieve can be adjusted to be applied to different screening requirements.
[0033] Specifically, as Figures 1 to 3 shown, the uniform distribution structure 3 includes a turntable 31 and uniform distribution rods 32. The turntable 31 is fixedly installed at the output end of the motor. The motor is inclined at 45°. Three uniform distribution rods 32 are evenly and fixedly installed on the outer surface of the turntable 31.
[0034] Due to the inclined setting of the motor, during the rotation of the turntable 31, the three uniform distribution rods 32 can successively push the sand material on the primary sieve 6, realizing the uniform distribution of the sand material.
[0035] The initial deflection angles of the turntables 31 in the two uniform distribution structures 3 are different, with a difference of 60°, which can ensure that the uniform distribution rods 32 in the two uniform distribution structures 3 are staggered and will not interfere with each other, and effectively complete the uniform distribution of the sand material.
[0036] Specifically, as Figures 1 to 3 shown, the uniform distribution rod 32 includes a bent section and a straight section. One end of the bent section is installed on the turntable 31, and the straight section is integrally formed at the other end of the bent section. The straight section forms an angle of 45° with the main shaft of the motor. A partition 21 is fixedly installed on the lower surface of the inner cavity of the expansion chamber 2. The partition 21 is located inside the motor, and the inner surface of the partition 21 is coplanar with the inner wall of the housing 1. An opening is provided on the upper surface of the partition 21.
[0037] As Figure 2As shown, due to the 45° inclined setting of the motor and the 45° angle between the straight segment and the main shaft of the motor, it can be known that when the uniform distribution rod 32 rotates to the lowermost position, the straight segment is parallel to the primary screen 6 and located above the primary screen 6, and is used to push the sand material to be evenly distributed. At this time, the bent segment passes through the opening of the partition plate 21.
[0038] The straight segment of the uniform distribution rod 32 does not directly contact the primary screen 6 and will not push all the sand material on the primary screen 6 away. During the movement process, the uniform distribution rod 32 only contacts the upper half of the sand material and pushes it away, completing the dispersion and uniform distribution of the sand material.
[0039] The partition plate 21 is used to block the sand material from falling into the expansion cavity 2, and the opening formed on the partition plate 21 is used to enable the uniform distribution rod 32 to pass through smoothly.
[0040] In order to ensure that the partition plate 21 can effectively block the sand material, there are requirements for the opening height of the partition plate 21. For this reason, a bent segment is designed for the uniform distribution rod 32. The end of the bent segment connected to the turntable 31 forms a 45° angle with the outer surface of the turntable 31. The bent segment is bent twice, and the two bends are 90° bends in opposite directions. Finally, the straight segment forms a 45° angle with the outer surface of the turntable 31. When the uniform distribution rod 32 rotates to the lowermost position, the straight segment of the uniform distribution rod 32 is in a horizontal state and parallel to the primary screen 6. Designing the bent segment enables the uniform distribution rod 32 to pass through the opening on the partition plate 21, and at the same time enables the opening height not to be too low, so as to effectively block the sand material.
[0041] There is a certain distance between the straight segment of the uniform distribution rod 32 at the lowermost position and the surface of the primary screen 6, ensuring that the uniform distribution rod 32 will not contact the primary screen 6 during the rotation process. At the same time, the uniform distribution rod 32 will not push all the sand material here during the rotation process, and can better achieve the uniform distribution of the sand material.
[0042] Specifically, as Figures 1 to 3 shown, a pushing plate 33 is fixedly installed on the outer surface of the straight segment of the uniform distribution rod 32.
[0043] The pushing plate 33 plays a role in assisting in pushing the sand material, effectively realizing the dispersion and uniform distribution of the sand material.
[0044] Specifically, as Figures 4 to 6 shown, the dispersion structure 5 includes side plates 51, dispersion plates 53, lower limit blocks 55 and upper limit rods 56. Two side plates 51 are symmetrically and fixedly installed at the lower end of the feeding port 4. A fixed shaft 52 is symmetrically and fixedly installed between the two side plates 51, and the dispersion plates 53 are sleeved on the fixed shaft 52. Two groups of lower limit blocks 55 and upper limit rods 56 are symmetrically and fixedly installed between the two side plates 51, and the inner ends of the dispersion plates 53 are located between the lower limit blocks 55 and the upper limit rods 56.
[0045] As Figure 1As shown, it can be seen that the two side plates 51 are symmetrically arranged left and right at the lower end of the feeding port 4, the fixed shaft 52 is symmetrically arranged front and back, and finally the two dispersion plates 53 are arranged on the front and back sides below the opening at the lower end of the feeding port 4.
[0046] A dispersion structure 5 is arranged at the lower end of the feeding port 4. The dispersion plate 53 can guide the movement direction of the sand materials falling on both sides, causing this part of the sand materials to slide down to both sides, which can prevent all the sand materials from falling on the same position of the primary screen 6 and achieve the dispersion of the sand materials.
[0047] The lower limit block 55 is located below the upper limit rod 56. The lower limit block 55 and the upper limit rod 56 are used to limit the inclination angle of the dispersion plate 53. Different inclination angles will result in different landing points of the sand materials.
[0048] The initial position of the dispersion plate 53 is as Figure 2 shown. When the amount of sand materials input is small, the position where the sand materials fall is relatively close to the center position of the primary screen 6, and at the same time, the amount of sand materials actually falling on the center position of the primary screen 6 is also small, completing the dispersed fall of the sand materials; when the amount of sand materials input is large, the gravity and the impact force of the falling sand materials will drive the dispersion plate 53 to deflect to a more horizontal state. At this time, the position where the sand materials fall is relatively far from the center position of the primary screen 6, improving the dispersion effect of the falling sand materials.
[0049] Specifically, as Figures 4 to 6 shown, a counterweight 54 is fixedly installed on the lower surface of the outer end of the dispersion plate 53.
[0050] By setting the counterweight 54, it is ensured that the initial position of the dispersion plate 53 is the position in contact with the upper limit rod 56.
[0051] Specifically, as Figures 4 to 6 shown, the outer end face of the dispersion plate 53 is an inclined plane.
[0052] The dispersion plate 53 can be set to be narrower on the left and wider on the right or wider on the left and narrower on the right, making its cross-sectional shape similar to a trapezoid. The purpose is to prevent all the sand materials falling along the dispersion plate 53 from falling on the same position, further realizing the dispersion of the sand materials.
[0053] Specifically, as Figure 1 shown, a guide plate 8 is arranged on the inner wall of the housing 1. The guide plate 8 is located between the primary screen 6 and the secondary screen 7, and the guide plate 8 is parallel to the primary screen 6. The upper end of the guide plate 8 is fixedly installed on the inner wall of the housing 1, and there is a blanking opening left between the lower end of the guide plate 8 and the inner wall of the housing 1.
[0054] As Figure 1 shown, the specific installation position of the guide plate 8 and the position of the blanking opening can be known.
[0055] The material guiding plate 8 is provided to collect the sand material screened by the primary screen 6 and uniformly drop it onto the upper end position of the secondary screen 7 through the blanking opening, enabling the movement of this part of the sand material to pass through the entire secondary screen 7 and improving the screening effect.
[0056] Since the length of the material guiding plate 8 is less than that of the primary screen 6, the sand material falling from the primary screen 6 onto the material guiding plate 8 will finally fall from the left end of the material guiding plate 8 onto the secondary screen 7.
[0057] Since the uniform distribution structure 3 and the dispersion structure 5 are provided above the primary screen 6, the sand material on the primary screen 6 is uniformly distributed and subjected to vibration screening, making the sand material falling onto the material guiding plate 8 uniformly distributed. Therefore, when this part of the sand material falls onto the secondary screen 7, it is also uniformly and dispersedly distributed, which can improve the screening effect of the secondary screen 7.
[0058] Specifically, as Figure 1 shown, a support plate 81 is fixedly installed between the lower surface of the material guiding plate 8 and the inner wall of the housing 1 to assist in supporting the material guiding plate 8.
[0059] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, many changes can be made in the specific implementation manners and application scopes according to the idea of the present utility model. As long as these changes do not depart from the concept of the present utility model, they all belong to the protection scope of the present utility model.
Claims
1. A sand screening device for construction, characterized in that: It includes a shell, an expansion cavity, a uniform structure, a feed inlet, a dispersion structure, a primary screen and a secondary screen, the inner cavity of the shell is symmetrically provided with expansion cavities, the lower surfaces of the inner cavities of the two expansion cavities are equipped with motors, and the uniform structure is fixedly installed at the output end of the motor, the upper surface of the shell is provided with a feed inlet, the lower end of the feed inlet is equipped with a dispersion structure, the primary screen and the secondary screen are fixedly installed in the shell, and the secondary screen is located below the primary screen, the primary screen and the secondary screen are both inclined, and the lower end of the primary screen is located above the upper end of the secondary screen, and the primary screen is located below the uniform structure; The uniform distribution structure includes a turntable and a uniform distribution rod, the turntable is fixedly installed on the output end of the motor, the motor is set at an angle of 45 degrees, and three uniform distribution rods are evenly fixedly installed on the outer surface of the turntable; The dispersion structure includes a side plate, a dispersion plate, a lower limit block and an upper limit rod. The two side plates are symmetrically fixedly installed at the lower end of the feed port. A fixed shaft is symmetrically fixedly installed between the two side plates, and the dispersion plate is sleeved on the fixed shaft. Two groups of lower limit blocks and upper limit rods are symmetrically fixedly installed between the two side plates front and back, and the inner end of the dispersion plate is located between the lower limit block and the upper limit rod.
2. A sand screening device for construction according to claim 1, characterized in that: The mesh number of the primary sieve is smaller than the mesh number of the secondary sieve.
3. A sand screening device for construction according to claim 1, characterized in that: The uniform distribution rod includes a curved section and a straight section, one end of the curved section is installed on the turntable, and the straight section is integrally formed at the other end of the curved section, the straight section forms an angle of 45° with the motor main shaft, a partition is fixedly installed on the lower surface of the inner cavity of the expansion cavity, the partition is located on the inner side of the motor, and the inner surface of the partition is coplanar with the inner wall of the outer shell, and an opening is opened on the upper surface of the partition.
4. A sand screening device for construction according to claim 3, characterized in that: A push plate is fixedly mounted on the outer surface of the straight section of the uniform distribution rod.
5. A sand screening device for construction according to claim 1, characterized in that: A counterweight block is fixedly mounted on the lower surface of the outer end of the dispersion plate.
6. A sand screening device for construction according to claim 1, characterized in that: The outer end surface of the dispersion plate is an inclined surface.
7. A sand screening device for construction according to claim 1, characterized in that: A material guide plate is provided on the inner wall of the shell, and the material guide plate is located between the primary screen and the secondary screen, and the material guide plate is parallel to the primary screen. The upper end of the material guide plate is fixedly mounted on the inner wall of the shell, and a material dropping opening is left between the lower end of the material guide plate and the inner wall of the shell.
8. A sand screening device for construction according to claim 7, characterized in that: A support plate is fixedly installed between the lower surface of the material guide plate and the inner wall of the shell.