Sand screening device for civil engineering
By combining the design of oblique and flat screen, the inclined setting and multi-directional vibration structure are used to solve the problems of poor screening effect and inconvenient discharge of unqualified sand and gravel, automatic discharge and efficient screening and retention are achieved, and sand and gravel screening is improved Partial effect.
Patent Information
- Application Number
- CN202421114134.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-21
AI Technical Summary
In the prior art, the screening effect of the oblique sieving screen is poor, and the discharge of sand and gravel in the flat screen is inconvenient.
A sand screening device for civil engineering was designed, combining the performance of oblique screening and flat screening. Through the coordination of inclined fence frame, connecting shaft, screening and control handle, the automatic discharge of unqualified sand and gravel is achieved. , and provide multi-directional vibration screening through the combination of vibration-enhancing springs, slides and wave grooves to improve the retention time of sand and gravel.
It realizes efficient screening and retention of unqualified sand and gravel automatically discharges inclined screens and solves the problems of poor screening effect and inconvenient discharge of unqualified sand and gravel, and can complete multi-directional vibration screening without a power source. .
Smart Images
Figure CN222325746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand screening devices, in particular to a sand screening device for civil engineering. Background Art
[0002] A large amount of sand and gravel is needed in civil construction. The sorting of sand and gravel requires the use of sand screening devices. The types of sand screening devices include flat screens and inclined screens.
[0003] The inclined screen is fixed and placed obliquely on the ground. It does not require power equipment, but the retention time of sand and gravel on the screen is short when screening sand, and some qualified sand and gravel will slide along the screen, resulting in poor screening effect. The flat screen has powered and non-powered types. The retention time of sand and gravel on the screen is longer than that of the inclined screen, so the screening effect is good, but there is a problem that unqualified sand and gravel will be retained on the flat screen and inconvenient to discharge.
[0004] The civil engineering sand screening device provided in this solution combines the performance of an inclined screen with that of a flat screen, thereby increasing the retention of sand and gravel and facilitating the discharge of unqualified sand and gravel. Utility Model Content
[0005] The utility model aims at least to solve the problems in the prior art that the screening effect of the inclined screen is poor and the unqualified sand and gravel of the flat screen is inconvenient to be discharged.
[0006] The present invention provides a sand screening device for civil engineering, which is achieved by the following specific technical means: comprising a base frame, a retaining frame is arranged between the vertical frames fixed at the four corners of the base frame, the retaining frame is arranged obliquely, a convex seat is fixed on the side near the lower end of the bottom side of the retaining frame, a connecting shaft is rotatably mounted on the convex seat, and a screen is fixed on the connecting shaft, in the initial state of the screen, since the center of gravity is located between the connecting shaft and the high end of the screen, the screen can be blocked at the bottom of the retaining frame, when in use, sand and gravel are put into the middle and upper part of the screen, and the sand and gravel slide down along the inclined screen. Qualified sand and gravel leak out from the sieve holes, large particles and a small amount of qualified sand and gravel slide to the lower end of the screen and are blocked by the enclosure frame, remaining on the screen for further screening. The next impact of sand and gravel being dropped onto the screen will vibrate the large particles and some qualified sand and gravel remaining on the screen again, and further screening will allow the qualified sand and gravel to gain screening power and screening time again. As the screening time increases, unqualified sand and gravel accumulate at the lower end of the screen, and when its gravity can break the balance of the screen, the screen flips, causing the bottom of the screen to flip downward away from the enclosure frame, and the retained unqualified sand and gravel is discharged.
[0007] Preferred technical solution one: when the screen is flipped, the upper end slides into the enclosure frame, and a control handle is fixed at the high end of the screen. The control handle extends from the enclosure frame. When the screen is blocked at the bottom of the enclosure frame, the transverse section of the top of the control handle touches the top wall of the enclosure frame. After the screen is flipped to discharge unqualified sand and gravel, the screen can be reset by the control handle.
[0008] Preferred technical solution 2: An extension plate is fixed at the lower end of the screen. When the screen is flipped to discharge sand and gravel, the sand and gravel are discharged over a long distance along the extension plate to avoid falling directly into the base frame.
[0009] Preferred technical solution three: baffles extending to the lower end of the extension plate are fixedly provided on both sides of the screen below the connecting shaft, and the baffles are located on the outside of the enclosure frame.
[0010] Preferred technical solution four: a slide is slidably provided on the vertical frame, and the four corners of the enclosure frame are fixed on four groups of slides. A vibration-enhancing spring is connected between each group of the slides and the top of the vertical frame, and the rebound force of the vibration-enhancing spring is used to provide up and down vibration force for the screening of the screen.
[0011] Preferred technical solution five: A wave groove is opened on the upper edge of each group of vertical frames in the height direction, and a convex shaft is fixed on the sliding seat. The convex shaft slides along the wave groove. By utilizing the cooperation between the wave groove and the convex shaft, when the screen is impacted, it can not only vibrate up and down, but also vibrate left and right, thereby increasing the screening effect.
[0012] The above structure enables this solution to have the following beneficial effects:
[0013] 1. The coordination of the oblique enclosure, connecting shaft and screen realizes the combination of the function of the oblique screen to automatically and centrally discharge unqualified sand and gravel and the function of the flat screen to increase the retention time of sand and gravel screening, and solves the problem that the oblique screen has poor screening effect and the unqualified sand and gravel is inconvenient to discharge when the flat screen is placed;
[0014] 2. The combination of spring, slide seat, cam shaft and wave groove can complete multi-directional vibration screening in the sand and gravel screening process without setting any power source. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the overall structure of this scheme;
[0017] Figure 2 This is the upper view of this scheme;
[0018] Figure 3This is a schematic diagram of the structure of the chassis of this scheme;
[0019] Figure 4 This is a schematic diagram of the structure of the enclosure, connecting shaft and screen in this scheme.
[0020] Among them, 1. base frame, 11. vertical frame, 111. wave groove, 2. enclosure frame, 21. convex seat, 22. connecting shaft, 3. screen, 31. control handle, 32. extension plate, 33. baffle, 4. slide seat, 41. convex shaft, 5. vibration-enhancing spring. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0022] Example 1, please refer to Figure 1-Figure 2 and Figure 4 The sand screening device for civil engineering comprises a base frame 1, and a baffle frame 2 is arranged between vertical frames 11 fixed at the four corners of the base frame 1. The baffle frame 2 is arranged tilted, and a convex seat 21 is fixed to the side near the lower end of the bottom side of the baffle frame 2. A connecting shaft 22 is rotatably mounted on the convex seat 21, and a screen 3 is fixed on the connecting shaft 22. In the initial state of the screen 3, since the center of gravity is located between the connecting shaft 22 and the high end of the baffle frame 2, the screen 3 can be blocked at the bottom of the baffle frame 2. At this time, the screen 3 is in an inclined state. When in use, sand and gravel are put into the middle and upper part of the screen 3, that is, put above the connecting shaft 22. The sand and gravel are placed along the inclined state. During the sliding of the screen 3, qualified sand and gravel leak out from the screen holes, large sand and gravel and a small amount of qualified sand and gravel slide to the lower end of the screen 3, and are blocked by the enclosure frame 2 and retained on the screen 3. The impact force of the next sand and gravel delivery to the screen 3 will vibrate the large sand and gravel and part of the qualified sand and gravel retained on the screen 3 again, and further screening will enable the qualified sand and gravel to obtain screening power and screening time again. As the screening time increases, unqualified sand and gravel accumulate at the lower end of the screen 3. When its gravity can break the balance of the screen 3, the screen 3 flips, causing the bottom end of the screen 3 to flip downward away from the enclosure frame 2, and the retained unqualified sand and gravel is discharged;
[0023] When the screen 3 is flipped, the upper end slides into the enclosure frame 2, and a control handle 31 is fixed to the high end of the screen 3. The control handle 31 extends out of the enclosure frame 2. When the screen 3 is blocked at the bottom of the enclosure frame 2, the transverse section of the top of the control handle 31 touches the top wall of the enclosure frame 2. After the screen 3 is flipped to discharge unqualified sand and gravel, the screen 3 can be reset by the control handle 31.
[0024] Example 2, based on Example 1, please refer to Figure 1-Figure 2 and Figure 4 , a sand screening device for civil engineering, an extension plate 32 is fixed to the lower end of the screen 3, and when the screen 3 is flipped to discharge sand and gravel, the sand and gravel are discharged over a long distance along the extension plate 32 to avoid directly falling into the base frame 1; baffles 33 extending to the lower end of the extension plate 32 are fixedly arranged on both sides of the screen 3 below the connecting shaft 22, and the baffles 33 are located on the outside of the enclosure frame 2. The baffles 33 are set to protect the sand and gravel when the screen 3 is flipped downward to prevent the sand and gravel from falling from both sides.
[0025] Example 3, based on Example 1 or 2, please refer to Figure 1-Figure 4 A sand screening device for civil engineering, a slide seat 4 is slidably provided on the vertical frame 11, and the four corners of the enclosure frame 2 are respectively fixed on four groups of slide seats 4, and a vibration-enhancing spring 5 is connected between each group of slide seats 4 and the top of the vertical frame 11. The setting of the vibration-enhancing spring 5 can absorb the impact force when sand and gravel are thrown, and the rebound force of the vibration-enhancing spring 5 is used to provide up and down vibration force for the screening of the screen 3.
[0026] Example 4, based on Example 3, please refer to Figure 1-Figure 4 , a sand screening device for civil engineering, each set of vertical frames 11 is provided with a wave groove 111 in the height direction, a convex shaft 41 is fixed on the slide 4, and the convex shaft 41 slides along the wave groove 111. By utilizing the cooperation between the wave groove 111 and the convex shaft 41, when the screen 3 is impacted, it can not only vibrate up and down, but also vibrate left and right, thereby increasing the screening effect and slowing down the deformation rate of the elastic deformation of the vibration-enhancing spring 5, thereby avoiding the problem that the sand and gravel are easily thrown out by the rebound force due to the rapid rebound of the vibration-enhancing spring 5. Two sets of convex shafts 41 are fixed on each set of slides 4, and the two sets of convex shafts 41 are respectively located in two adjacent sets of waves in the wave groove 111, thereby ensuring the stability of the slide 4 sliding along the vertical frame 11.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sand screening device for civil engineering, comprising a base frame (1), characterized in that: A retaining frame (2) is arranged between the vertical frames (11) fixed at the four corners of the base frame (1), and the retaining frame (2) is arranged in an inclined manner. A convex seat (21) is fixed on the side edge of the bottom side of the retaining frame (2) near the lower end, and a connecting shaft (22) is rotatably mounted on the convex seat (21), and a screen (3) is fixed on the connecting shaft (22). Since the center of gravity of the screen (3) is located between the connecting shaft (22) and the upper end of the screen (3), the screen (3) can be blocked at the bottom of the retaining frame (2) under the action of its own weight. When a certain amount of unqualified sand and gravel after screening accumulates at the bottom end of the screen (3), the center of gravity of the screen (3) moves to between the connecting shaft (22) and the lower end of the screen (3), so that the screen (3) is turned over, and the sand and gravel retained on the screen (3) is discharged.
2. A sand screening device for civil engineering according to claim 1, characterized in that: When the screen (3) is turned over, the upper end slides into the enclosure frame (2); a control handle (31) is fixed to the upper end of the screen (3); the control handle (31) extends from the enclosure frame (2); and when the screen (3) is blocked at the bottom of the enclosure frame (2), the transverse section of the top of the control handle (31) touches the top wall of the enclosure frame (2).
3. A sand screening device for civil engineering according to claim 1, characterized in that: An extension plate (32) is fixed to the lower end of the screen (3).
4. A sand screening device for civil engineering according to claim 3, characterized in that: Baffles (33) extending to the lower end of the extension plate (32) are fixedly provided on both sides of the screen (3) below the connecting shaft (22), and the baffles (33) are located outside the enclosure frame (2).
5. The sand screening device for civil engineering according to claim 1, characterized in that: A slide seat (4) is slidably provided on the vertical frame (11), and the four corners of the enclosure frame (2) are fixed on four groups of slide seats (4). A vibration-enhancing spring (5) is connected between each group of the slide seats (4) and the top of the vertical frame (11).
6. A sand screening device for civil engineering according to claim 5, characterized in that: Each group of the vertical frames (11) is provided with a wave groove (111) along the height direction, and a convex shaft (41) is fixed on the slide seat (4), and the convex shaft (41) slides along the wave groove (111).
7. A sand screening device for civil engineering according to claim 6, characterized in that: Two groups of convex shafts (41) are fixed on each group of the slide seats (4), and the two groups of convex shafts (41) are respectively located in two groups of waves adjacent to each other in the wave groove (111).