Anti-crack concrete raw material screening device

Abstract

The utility model provides an anti-crack concrete raw material screening device, which belongs to the technical field of screening devices and comprises a rack and two layers of screening plates. The two layers of sieve plates are obliquely arranged on the rack; the aperture of the upper-layer sieve plate is larger than that of the lower-layer sieve plate; the high end of the upper-layer sieve plate is a feeding end; the lower end of the upper-layer sieve plate and the lower end of the lower-layer sieve plate are discharge ends; wherein each layer of sieve plate is in sliding fit with the rack in the inclined direction, sliding grooves in sliding fit with the sieve plates are formed in the rack, and the bottoms of the sliding grooves make contact with the bottoms of the sieve plates so as to support the sieve plates; a driving part for driving the sieve plate to slide is further arranged on the rack, and the driving end of the driving part is detachably connected with the sieve plate; the two layers of sieve plates are arranged on the rack, stone can be screened twice, the size of the stone on the lower-layer sieve plate is within the preset range, and therefore the situation that concrete cracks can be reduced when the screened stone is used for producing concrete.

Description

Technical Field

[0001] This utility model belongs to the technical field of screening devices, specifically relating to a screening device for crack-resistant concrete raw materials. Background Technology

[0002] Concrete is the most widely used and extensively applied man-made material. The development of concrete crack resistance is mainly aimed at solving the problem of cracking that easily occurs during the preparation and use of concrete. During the preparation and use of concrete, it is affected by a variety of factors. During the setting process of concrete, cement and aggregates will settle differently due to their different physical properties. If the aggregate gradation is not good, it will cause concrete segregation. During the hardening process of concrete, different shrinkage properties will lead to shrinkage cracking. Therefore, it is necessary to screen the stones and aggregates used. Utility Model Content

[0003] This utility model provides a crack-resistant concrete raw material screening device, which aims to screen stone materials to reduce the occurrence of shrinkage cracks in concrete.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A crack-resistant concrete raw material screening device is provided, comprising:

[0006] frame;

[0007] Two sieve plates are inclinedly arranged on the frame; the aperture of the upper sieve plate is larger than that of the lower sieve plate, the high end of the upper sieve plate is the feed end; the low ends of both the upper and lower sieve plates are the discharge ends.

[0008] Each of the screen plates is slidably engaged with the frame along an inclined direction. The frame has a sliding groove that is slidably engaged with the screen plate. The bottom of the sliding groove contacts the bottom of the screen plate to support the screen plate. The frame is also provided with a driving component that drives the screen plate to slide. The driving end of the driving component is detachably connected to the screen plate.

[0009] In one possible implementation, the driving component includes:

[0010] The connecting plate is connected at both ends to the high ends of the two layers of sieve plates, respectively;

[0011] A cam is rotatably mounted on the frame; the outer peripheral wall of the cam has an annular groove, and the side wall of the annular groove has a limiting groove;

[0012] The connecting rod has one end located in the annular groove and has rollers located in the limiting groove; the other end of the connecting rod is hinged to the connecting plate.

[0013] A drive motor is connected to the frame; the output shaft of the drive motor is connected to the rotating shaft of the cam to drive the cam to rotate.

[0014] In one possible implementation, the high end of the sieve plate has a slot, and the connecting plate has a plug-in portion that engages with the slot.

[0015] The sieve plate has a first positioning hole on its side wall that communicates with the slot, and the insertion part has a second positioning hole that is aligned with the first positioning hole; when the insertion part is inserted into the slot, the insertion part and the slot are fixed by a pin.

[0016] In one possible implementation, both the first positioning hole and the second positioning hole have internal threads, the outer peripheral wall of the pin has external threads, and the pin is threadedly engaged with the first positioning hole and the second positioning hole.

[0017] In one possible implementation, the connecting plate has a hinge seat in the middle, and the connecting rod is hinged to the hinge seat;

[0018] The hinge seat has a threaded hole, and the connecting plate has a through hole aligned with the threaded hole of the hinge seat; the hinge seat and the connecting plate are connected by bolts.

[0019] In one possible implementation, the outer peripheral wall of the cam has a clearance groove communicating with the limiting groove, the clearance groove enabling the roller to be inserted into the limiting groove;

[0020] The cam is provided with a sealing plate at the avoidance groove position. The bottom of the sealing plate is on the same plane as the top of the limiting groove. The sealing plate is connected to the cam by bolts.

[0021] In one possible implementation, the drive motor is located below the upper screen plate and above the lower screen plate; the connecting plate is detachably connected to the screen plate, and when the connecting plate is separated from the screen plate, the screen plate can slide out of the frame along the slide groove.

[0022] In one possible implementation, the frame is connected to a first baffle at the high end of the upper sieve plate, the frame is connected to a second baffle between the high end of the upper sieve plate and the high end of the lower sieve plate, and the frame is provided with a third baffle at the high end of the lower sieve plate.

[0023] The first baffle, the second baffle, and the third baffle are all fixed on the frame.

[0024] In one possible implementation, the frame is provided with a first discharge chute at the lower end of the upper screen plate, and the frame is provided with a second discharge chute at the lower end of the lower screen plate.

[0025] The frame has a discharge port located below the second discharge trough, which is used to discharge the material between the bottom of the frame and the lower screen plate.

[0026] In one possible implementation, the bottom wall inside the frame has an inclined surface, and the discharge port is located at the lowest point of the inclined surface.

[0027] The present invention provides a crack-resistant concrete raw material screening device. Compared with the prior art, by setting two layers of screen plates on the frame, the stone material can be screened twice, so that the size of the stone material on the lower screen plate is within a preset range. Therefore, the screened stone material is used to produce concrete, which can reduce the occurrence of cracking in the concrete. Attached Figure Description

[0028] Figure 1 A schematic diagram of a crack-resistant concrete raw material screening device provided in an embodiment of this utility model;

[0029] Figure 2 A cross-sectional schematic diagram of a crack-resistant concrete raw material screening device provided in an embodiment of this utility model;

[0030] Figure 3 A schematic diagram of the first baffle portion of a crack-resistant concrete raw material screening device provided in an embodiment of this utility model;

[0031] Figure 4 for Figure 3 Enlarged diagram of section A in the middle;

[0032] Figure 5 A schematic diagram of the drive component of a crack-resistant concrete raw material screening device provided in an embodiment of this utility model;

[0033] Figure 6 for Figure 5 Enlarged diagram of section B in the middle;

[0034] Figure 7 for Figure 5 Enlarged diagram of section C;

[0035] Figure 8 This is a schematic diagram of the cam part of a crack-resistant concrete raw material screening device provided in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Slide groove; 12. Strip opening; 13. First discharge chute; 14. Second discharge chute; 15. Discharge port; 16. Inclined surface; 2. Screen plate; 21. Slot; 22. First positioning hole; 3. Drive component; 31. Connecting plate; 311. Insertion part; 312. Second positioning hole; 32. Cam; 321. Annular groove; 322. Limiting groove; 323. Clearance groove; 33. Connecting rod; 331. Roller; 34. Drive motor; 35. Hinge seat; 36. Pin; 37. Sealing plate; 4. First baffle; 5. Second baffle; 6. Third baffle. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] Please refer to the following: Figures 1 to 8 The present invention provides a screening device for crack-resistant concrete raw materials. The screening device includes a frame 1 and two layers of screen plates 2. Both layers of screen plates 2 are inclinedly arranged on the frame 1. The aperture of the upper screen plate 2 is larger than that of the lower screen plate 2, and the upper end of the upper screen plate 2 is the feed end. The lower ends of both the upper and lower screen plates 2 are discharge ends. Each screen plate 2 slides along the inclined direction with the frame 1. The frame 1 has a sliding groove 11 that slides with the screen plate 2, and the bottom of the groove 11 contacts the bottom of the screen plate 2 to support the screen plate 2. The frame 1 is also provided with a driving component 3 for driving the screen plate 2 to slide, and the driving end of the driving component 3 is detachably connected to the screen plate 2.

[0039] The present invention provides a crack-resistant concrete raw material screening device. Compared with the prior art, by setting two layers of screen plates 2 on the frame 1, the stone material can be screened twice, so that the size of the stone material on the lower screen plate 2 is within the preset range. Therefore, the screened stone material is used to produce concrete, which can reduce the occurrence of cracking in the concrete.

[0040] It should be noted that the upper sieve plate 2 and the lower sieve plate 2 can be replaced, not only with sieve plates 2 of the same aperture, but also with sieve plates 2 of different apertures; in the crack-resistant concrete test, the optimal range of stone size can be obtained, thereby improving the overall performance of the crack-resistant concrete.

[0041] In some embodiments, such as Figures 1 to 8As shown, the driving component 3 includes a connecting plate 31, a cam 32, a connecting rod 33, and a driving motor 34; both ends of the connecting plate 31 are respectively connected to the high ends of the two layers of screen plates 2; the cam 32 is rotatably mounted on the frame 1; the outer peripheral wall of the cam 32 has an annular groove 321, and the side wall of the annular groove 321 has a limiting groove 322; one end of the connecting rod 33 is located in the annular groove 321, and the connecting rod 33 has a roller 331 located in the limiting groove 322; the other end of the connecting rod 33 is hinged to the connecting plate 31; the driving motor 34 is connected to the frame 1; the output shaft of the driving motor 34 is connected to the rotating shaft of the cam 32 to drive the cam 32 to rotate.

[0042] It should be noted that there are two sets of drive components 3, both with identical structures. The two sets of drive components 3 are respectively set on both sides of the screen plate 2. Taking one set of drive components 3 as an example, the description will be provided. The drive motor 34 is fixed on the frame 1. The drive motor 34 can drive the cam 32 to rotate, and the connecting rod 33 can follow the movement of the cam 32, thereby causing the connecting rod 33 to drive the screen plate 2 to slide along the direction of the slide groove 11. Since the roller 331 on the connecting rod 33 and the limiting groove 322 of the cam 32 can generate relative movement, there will be no interference between the connecting rod 33 and the cam 32, and the cam 32 can drive the connecting rod 33 to move.

[0043] For example, the connecting plate 31 has a hinge seat 35 in the middle, and the connecting rod 33 is hinged to the hinge seat 35; wherein, the hinge seat 35 has a threaded hole, and the connecting plate 31 has a through hole aligned with the threaded hole of the hinge seat 35; the hinge seat 35 and the connecting plate 31 are connected by bolts; the connecting rod 33 is hinged to the hinge seat 35, and after the hinge seat 35 is fixed on the connecting plate 31, the connecting rod 33 and the connecting plate 31 are hinged; when the cam 32 drives the connecting rod 33 to move, the connecting rod 33 can drive the connecting plate 31 to move, thereby causing the screen plate 2 to slide along the slide groove 11; through the reciprocating rotation of the cam 32, the screen plate 2 can slide back and forth, thereby screening the stone on the screen plate 2.

[0044] In some embodiments, such as Figures 1 to 8 As shown, the high end of the sieve plate 2 has a slot 21, and the connecting plate 31 has a plug-in part 311 that engages with the slot 21. The side wall of the sieve plate 2 has a first positioning hole 22 that communicates with the slot 21, and the plug-in part 311 has a second positioning hole 312 that aligns with the first positioning hole 22. When the plug-in part 311 engages with the slot 21, the plug-in part 311 and the slot 21 are fixed by a pin 36. Both the first positioning hole 22 and the second positioning hole 312 have internal threads, and the outer peripheral wall of the pin 36 has external threads. The pin 36 engages with the first positioning hole 22 and the second positioning hole 312.

[0045] It should be noted that, to facilitate the installation of the pin 36, a strip-shaped opening 12 is provided on the side wall of the frame 1, with the length direction of the strip-shaped opening 12 parallel to the length direction of the slide groove 11. When installing the connecting plate 31 onto the screen plate 2, the insertion part 311 on the connecting plate 31 is inserted into the slot 21 of the screen plate 2, and the screen plate 2 is slid until the strip-shaped opening 12 is aligned with the first positioning hole 22. Then, the pin 36 is installed onto the screen plate 2 and the insertion part 311 using a tool, so that the pin 36 is threadedly engaged with the first positioning hole 22 and the second positioning hole 312, thus fixing the connecting plate 31 onto the screen plate 2. After the pin 36 connects the screen plate 2 and the connecting plate 31, the pin 36 is entirely located within the first positioning hole 22 of the screen plate 2. Therefore, during the sliding process of the screen plate 2, the pin 36 will not interfere with the screen plate 2.

[0046] When the sieve plate 2 needs to be replaced, slide the sieve plate 2 to the position of the first positioning hole 22 and the strip opening 12, and then remove the pin 36 from the sieve plate 2 with a tool; the above-mentioned settings of this application facilitate the replacement of the sieve plate 2.

[0047] In some embodiments, such as Figures 1 to 8 As shown, the outer peripheral wall of the cam 32 has a relief groove 323 that communicates with the limiting groove 322. The relief groove 323 allows the roller 331 to be inserted into the limiting groove 322. The cam 32 is provided with a sealing plate 37 at the position of the relief groove 323. The bottom of the sealing plate 37 is on the same plane as the top of the limiting groove 322. The sealing plate 37 is connected to the cam 32 by bolts.

[0048] It should be noted that when installing the roller 331 on the connecting rod 33 onto the cam 32, the sealing plate 37 is first removed, then the roller 331 is inserted into the limiting groove 322 from the clearance groove 323, and finally the sealing plate 37 is fixed in the clearance groove 323 position of the cam 32. The outer peripheral wall of the roller 331 contacts the top and bottom of the limiting groove 322. Since the bottom of the sealing plate 37 and the top of the limiting groove 322 are on the same plane, when the roller 331 slides relative to the limiting groove 322, the roller 331 will not get stuck in the clearance groove 323 position, thus facilitating the cam 32 to drive the connecting rod 33 to move.

[0049] In some embodiments, such as Figures 1 to 8 As shown, the drive motor 34 is located below the upper screen plate 2 and above the lower screen plate 2; the connecting plate 31 is detachably connected to the screen plate 2. When the connecting plate 31 is separated from the screen plate 2, the screen plate 2 can slide out of the frame 1 along the slide groove 11. If the screen plate 2 cannot slide out of the frame 1 automatically, the operator needs to pull the screen plate 2 and pull it out of the frame 1.

[0050] It should be noted that by positioning the drive motor 34 between the two layers of screen plates 2, when the screen plates 2 need to be replaced, the drive motor 34 will not interfere with the screen plates 2 as they slide out along the slide groove 11, thus facilitating the replacement of the screen plates 2.

[0051] In some embodiments, such as Figures 1 to 8 As shown, a first baffle 4 is connected to the high end of the upper screen plate 2 of the frame 1, a second baffle 5 is connected between the high end of the upper screen plate 2 and the high end of the lower screen plate 2 of the frame 1, and a third baffle 6 is provided at the high end of the lower screen plate 2 of the frame 1; the first baffle 4, the second baffle 5 and the third baffle 6 are all fixed on the frame 1.

[0052] It should be noted that by setting a first baffle 4 on the frame 1, a screening area is formed between the first baffle 4, the two side walls of the frame 1, and the upper screen plate 2, which can reduce the occurrence of stones sliding out from the side of the screen plate 2. By setting a second baffle 5 on the frame 1, a screening area is formed between the second baffle 5, the two side walls of the frame 1, and the upper and lower screen plates 2, which can perform secondary screening of the stones, thereby screening out stones with particle sizes within a preset range, which can reduce the cracking of concrete after production. By setting a third baffle 6 on the frame 1, the material passing through the lower screen plate 2 can be limited.

[0053] In some embodiments, such as Figures 1 to 8 As shown, the frame 1 has a first discharge chute 13 at the lower end of the upper screen plate 2, and a second discharge chute 14 at the lower end of the lower screen plate 2. The frame 1 has a discharge port 15 below the second discharge chute 14, which is used to discharge material between the bottom of the frame 1 and the lower screen plate 2. The bottom wall inside the frame 1 has an inclined surface 16, and the discharge port 15 is located at the lowest point of the inclined surface 16.

[0054] It should be noted that conveyor belts (not shown in the figure) are installed at the positions of the first discharge chute 13 and the second discharge chute 14 to transport the stones sliding out of the first discharge chute 13 and the second discharge chute 14. The particle size of the stones sliding out of the first discharge chute 13 is larger than the preset range, so the stones in the first discharge chute 13 are transported to the crusher for crushing by the conveyor belt. The particle size of the stones in the second discharge chute 14 is within the preset range, so the stones in the second discharge chute 14 are transported to the designated hopper by the conveyor belt for subsequent batching. The material passing through the lower screen plate 2 falls to the bottom of the frame 1. The material at the bottom of the frame 1 can roll down the inclined plane 16 and be discharged from the discharge port 15 of the frame 1.

[0055] When the material discharge at the bottom of the frame 1 is not smooth, the operator can also insert a tool into the frame 1 through the discharge port 15 to remove the material from the frame 1.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crack-resistant concrete raw material screening device, characterized in that, include: frame; Both sieve plates are inclined and mounted on the frame; The aperture of the upper sieve plate is larger than that of the lower sieve plate. The upper end of the upper sieve plate is the feed end; the lower ends of both the upper and lower sieve plates are the discharge ends. Each of the screen plates is slidably engaged with the frame along an inclined direction. The frame has a sliding groove that is slidably engaged with the screen plate. The bottom of the sliding groove contacts the bottom of the screen plate to support the screen plate. The frame is also provided with a driving component that drives the screen plate to slide. The driving end of the driving component is detachably connected to the screen plate.

2. The crack-resistant concrete raw material screening device as described in claim 1, characterized in that, The driving component includes: The connecting plate is connected at both ends to the high ends of the two layers of sieve plates, respectively; A cam is rotatably mounted on the frame; the outer peripheral wall of the cam has an annular groove, and the side wall of the annular groove has a limiting groove; The connecting rod has one end located in the annular groove and has rollers located in the limiting groove; the other end of the connecting rod is hinged to the connecting plate. A drive motor is connected to the frame; the output shaft of the drive motor is connected to the rotating shaft of the cam to drive the cam to rotate.

3. The crack-resistant concrete raw material screening device as described in claim 2, characterized in that, The high end of the sieve plate has a slot, and the connecting plate has a plug-in portion that engages with the slot. The sieve plate has a first positioning hole on its side wall that communicates with the slot, and the insertion part has a second positioning hole that is aligned with the first positioning hole; when the insertion part is inserted into the slot, the insertion part and the slot are fixed by a pin.

4. The crack-resistant concrete raw material screening device as described in claim 3, characterized in that, Both the first positioning hole and the second positioning hole have internal threads, and the outer peripheral wall of the pin has external threads. The pin is threadedly engaged with the first positioning hole and the second positioning hole.

5. The crack-resistant concrete raw material screening device as described in claim 2, characterized in that, The connecting plate has a hinge seat in the middle, and the connecting rod is hinged to the hinge seat; The hinge seat has a threaded hole, and the connecting plate has a through hole aligned with the threaded hole of the hinge seat; the hinge seat and the connecting plate are connected by bolts.

6. The crack-resistant concrete raw material screening device as described in claim 2, characterized in that, The outer peripheral wall of the cam has a clearance groove that communicates with the limiting groove, and the clearance groove allows the roller to be inserted into the limiting groove. The cam is provided with a sealing plate at the avoidance groove position. The bottom of the sealing plate is on the same plane as the top of the limiting groove. The sealing plate is connected to the cam by bolts.

7. The crack-resistant concrete raw material screening device as described in claim 2, characterized in that, The drive motor is located below the upper screen plate and above the lower screen plate; the connecting plate is detachably connected to the screen plate, and when the connecting plate is separated from the screen plate, the screen plate can slide out of the frame along the slide groove.

8. The crack-resistant concrete raw material screening device as described in claim 1, characterized in that, The frame is connected to a first baffle at the high end of the upper sieve plate, the frame is connected to a second baffle between the high end of the upper sieve plate and the high end of the lower sieve plate, and the frame is provided with a third baffle at the high end of the lower sieve plate. The first baffle, the second baffle, and the third baffle are all fixed on the frame.

9. The crack-resistant concrete raw material screening device as described in claim 1, characterized in that, The frame is provided with a first discharge chute at the lower end of the upper screen plate, and the frame is provided with a second discharge chute at the lower end of the lower screen plate. The frame has a discharge port located below the second discharge trough, which is used to discharge the material between the bottom of the frame and the lower screen plate.

10. The crack-resistant concrete raw material screening device as described in claim 9, characterized in that, The bottom wall inside the frame has an inclined surface, and the discharge port is located at the lowest point of the inclined surface.

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