A sand and gravel particle grading device

Abstract

This utility model discloses a sand and gravel particle grading device, relating to the field of sand and gravel screening technology. It includes a vibrating screen and a cleaning mechanism. The vibrating screen comprises a grading tank, multiple grading screen plates spaced vertically, and a vibrating mechanism installed at the bottom of the grading tank. The cleaning mechanism includes rollers located at the bottom of the grading screen plates and capable of rolling along a circular trajectory at the bottom of the grading screen plates, and multiple sets of ejector pins arranged in a circular array on the outer circumferential wall of a rotating shaft. When the rollers rotate, each set of ejector pins inserts into the screen holes on the grading screen plates. This utility model, by adding a cleaning mechanism to the bottom of the grading screen plates, allows the rollers in the cleaning mechanism to roll along a circular trajectory at the bottom of the grading screen plates, causing multiple ejector pins on the outer wall of the rollers to sequentially insert into the screen holes on the grading screen plates. This ejects the sand and gravel stuck in the screen holes, achieving the purpose of cleaning the screen holes on the grading screen plates and ensuring the efficiency of subsequent sand and gravel screening on the grading screen plates.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening technology, and in particular to a sand and gravel particle grading device. Background Technology

[0002] Currently, many brick products (such as environmentally friendly bricks and landscape bricks) are made by screening the slag obtained after waste incineration to obtain sand and gravel particles, which are then further processed to obtain the corresponding brick products.

[0003] To meet the current demand for producing bricks of various specifications, it is necessary to screen and classify sand and gravel particles according to their diameter, so that sand and gravel particles within the corresponding diameter range can be used as raw materials for making corresponding brick products. However, existing sand and gravel particle classification devices mainly use vibrating screens for screening and classification. A common problem with this device is that sand and gravel easily get stuck in the screen holes, causing blockage and affecting the subsequent screening efficiency. Therefore, a sand and gravel particle classification device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a sand and gravel particle grading device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sand and gravel particle grading device, comprising:

[0006] A vibrating screen includes a grading tank, multiple grading screen plates spaced apart in a vertical direction, and a vibrating mechanism installed at the bottom of the grading tank.

[0007] The cleaning mechanism includes a roller located at the bottom of the grading screen plate and capable of rolling along a circular trajectory at the bottom of the grading screen plate, and multiple sets of ejector pins arranged in a circular array on the outer peripheral wall of the rotating shaft, so that when the roller rotates, it drives each set of ejector pins to insert into the screen holes on the grading screen plate.

[0008] Preferably, the sieve holes on the grading sieve plate are in multiple groups and arranged in a circular array, and each group of sieve holes consists of multiple holes that are spaced apart along a straight line toward the center of the grading sieve plate.

[0009] Preferably, a rotating shaft is rotatably connected to the middle of the inner cavity of the grading tank, and a drive motor for driving the rotating shaft is fixedly connected to the top of the grading tank. The outer wall of the rotating shaft is rotatably connected to the middle of multiple grading screens. One end of the roller is rotatably connected to the outer wall of the rotating shaft, and a transmission assembly is provided between the other end of the roller and the inner wall of the grading tank, so that the roller rotates on its own axis while rotating with the rotating shaft.

[0010] Preferably, the transmission assembly includes:

[0011] A connecting shaft is fixedly connected to the end of the roller away from the rotating shaft;

[0012] A bevel gear, wherein the bevel gear is fixedly sleeved on the end of the connecting shaft away from the roller;

[0013] The annular bevel tooth is fixedly connected to the outer side of the bottom end of the grading sieve plate, and the bottom of the outer wall of the annular bevel tooth meshes with the top of the side wall of the bevel gear.

[0014] Preferably, an annular groove is provided on the inner wall of the grading tank and below the grading screen plate. A slider is slidably connected in the annular groove, and the middle of the side wall of the slider is rotatably connected to the end of the feeding plate away from the roller.

[0015] Preferably, the vibration mechanism includes:

[0016] A base plate is located directly below the grading tank, and multiple support springs are fixedly connected between the base plate and the grading tank.

[0017] A vibration motor is fixedly installed at the bottom of the grading tank.

[0018] Preferably, the top of the grading tank is fixedly connected to a feed inlet, and the side wall of the grading tank is provided with a discharge component for separate discharge of sand and gravel from the grading screen plate.

[0019] Preferably, the discharge assembly includes:

[0020] A discharge hood is fixedly connected to the side wall of the grading tank, and a discharge port communicating with the inside of the grading tank is opened on the side wall of the discharge hood at the top position of the grading screen plate.

[0021] A shielding plate is slidably connected to the inside of the discharge hood near the grading tank. The shielding plate has multiple discharge through holes spaced apart from top to bottom. An electric lifting rod for driving the shielding plate to rise and fall is fixedly connected to the top of the discharge hood.

[0022] Compared with the prior art, the technical effects of this utility model are as follows:

[0023] This invention adds a cleaning mechanism to the bottom of the grading screen plate. The rollers in the cleaning mechanism roll along a circular trajectory at the bottom of the grading screen plate, causing multiple pins on the outer wall of the rollers to be inserted into the screen holes on the grading screen plate in sequence. This pushes out the sand and gravel stuck in the screen holes of the grading screen plate, thereby achieving the purpose of cleaning the screen holes on the grading screen plate and ensuring the efficiency of subsequent sand and gravel screening on the grading screen plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] Figure 2 This is a partial cross-sectional view of the front of the grading tank of this utility model.

[0026] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A.

[0027] Figure 4 This is a side sectional view of the material feeding cover of this utility model.

[0028] In the diagram: 100, grading tank; 101, feed inlet; 102, bottom plate; 103, support spring; 104, discharge cover; 105, discharge port; 106, electric lifting rod; 107, shielding plate; 108, discharge through hole; 109, drive motor; 110, rotating shaft; 111, grading screen plate; 112, material feeding plate; 113, roller; 114, ejector pin; 115, annular groove; 116, slider; 117, slider; 118, connecting shaft; 119, bevel gear; 110, annular bevel gear. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] This utility model provides, for example Figures 1-4The sand and gravel particle grading device shown includes a vibrating screen and a cleaning mechanism. The vibrating screen includes a grading tank 100, multiple grading screen plates 111 arranged vertically at intervals, and a vibrating mechanism installed at the bottom of the grading tank 100. The screen holes on the grading screen plates 111 are arranged in multiple groups in a circular array, with each group containing multiple screen holes spaced along a straight line towards the center of the grading screen plate 111. The vibrating mechanism drives the grading tank 100 to vibrate, causing the multiple grading screen plates 111 inside the grading tank 100 to sequentially vibrate and screen the sand and gravel. By gradually reducing the aperture of the screen holes on the multiple grading screen plates 111 arranged from top to bottom, the sand and gravel are graded and screened to obtain different grades of sand and gravel. The cleaning mechanism includes a device located at the bottom of the grading screen plates 111 and capable of rolling along a circular trajectory at the bottom of the grading screen plates 111. The roller 113 and multiple sets of ejector pins 114 arranged in a ring array on the outer peripheral wall of the rotating shaft 110 cause the roller 113 to rotate, driving each set of ejector pins 114 to insert into the screen holes on the grading screen plate 111. After the grading tank 100 vibrates in conjunction with the grading screen plate 111 to vibrate and screen the sand and gravel, some sand and gravel get stuck in the screen holes on the grading screen plate 111. At this time, the roller 113 in the cleaning mechanism rolls in a ring along the bottom end of the grading screen plate 111. During the rolling process of the roller 113, the rows of ejector pins 114 on the outer wall of the roller 113 are inserted into each set of screen holes at the corresponding positions. In this way, the sand and gravel stuck in the screen holes on the grading screen plate 111 can be pushed upward, thereby cleaning the screen holes on the grading screen plate 111 and maintaining the efficiency of the grading screen plate 111 for subsequent sand and gravel screening.

[0031] The vibration mechanism includes a base plate 102 and a vibration motor. The base plate 102 is located directly below the grading tank 100. Multiple support springs 103 are fixedly connected between the base plate 102 and the grading tank 100. The vibration motor is fixedly installed at the bottom of the grading tank 100. After the vibration motor is powered on, it generates vibration force which is transmitted to the grading tank 100. The base plate 102, together with the support springs 103, provides elastic support to the grading tank 100. This allows the grading tank 100 to vibrate under the drive of the vibration motor, thereby causing the grading screen plate 111 inside the grading tank 100 to vibrate and achieve the vibratory screening operation of sand and gravel.

[0032] Furthermore, a rotating shaft 110 is rotatably connected to the center of the inner cavity of the grading tank 100, and a drive motor 109 for driving the rotating shaft 110 to rotate is fixedly connected to the top of the grading tank 100. The outer wall of the rotating shaft 110 is rotatably connected to the center of multiple grading screens 111. One end of the roller 113 is rotatably connected to the outer wall of the rotating shaft 110, and a transmission assembly is provided between the other end of the roller 113 and the inner wall of the grading tank 100, so that the roller 113 rotates on its own while rotating with the rotating shaft 110. The drive motor 109 is powered on and drives the rotating shaft 110 to rotate, and the rotating shaft 110 then drives the roller 113 to rotate. With the help of the transmission assembly, the roller 113 rotates on its own while rotating with the rotating shaft 110, so that the roller 113 can roll along the circular track at the bottom of the grading tank 100.

[0033] The transmission assembly includes a connecting shaft 117, which is fixedly connected to the end of the roller 113 away from the rotating shaft 110. A bevel gear 118 is fixedly sleeved on the end of the connecting shaft 117 away from the roller 113. An annular bevel gear 119 is fixedly connected to the outer side of the bottom end of the grading screen plate 111. The bottom of the outer wall of the annular bevel gear 119 meshes with the top of the side wall of the bevel gear 118. An annular groove 115 is provided on the inner wall of the grading tank 100 below the grading screen plate 111. A slider 116 is slidably connected in the annular groove 115. The middle part of the side wall is rotatably connected to the end of the feeding plate 112 away from the roller 113. During the circular movement of the roller 113, the connecting shaft 117 causes the bevel gear 118 to move along the side wall of the annular bevel tooth 119. The meshing action between the annular bevel tooth 119 and the bevel gear 118 causes the bevel gear 118 to rotate during the movement, thereby driving the roller 113 to rotate through the connecting shaft 117. The cooperation of the annular groove 115 and the slider 116 can provide auxiliary support for the roller 113, making the rotation of the roller 113 more stable.

[0034] Example 2: Based on Example 1, the classification tank 100 is further described with a feed inlet 101 fixedly connected to its top. The side wall of the classification tank 100 is provided with a discharge assembly for the separate discharge of sand and gravel from the classification screen plate 111. The discharge assembly includes a discharge hood 104, which is fixedly connected to the side wall of the classification tank 100. A discharge port 105, communicating with the interior of the classification tank 100, is opened on the side wall of the discharge hood 104 at the top of the classification screen plate 111. A shielding plate 107 is slidably connected to the inside of the discharge hood 104 near the classification tank 100. Multiple discharge through holes 108 are spaced apart from top to bottom on the shielding plate 107. An electric lifting rod 106 for driving the shielding plate 107 to rise and fall is fixedly connected to the top of the discharge hood 104. A material-pushing plate 108 is also included. The roller 12 is positioned behind the roller 113 according to the rotation direction of the shaft 110. The roller 113, through the ejector pin 114, pushes out the sand and gravel from the screen holes of the grading screen plate 111. Then, it is pushed by the moving feed plate 112. The feed plate 112, in conjunction with the sand and gravel, moves the sand and gravel at the top of the grading screen plate 111, causing centrifugal force and moving it towards the inner wall of the grading tank 100. Then, the electric lifting rod 106 drives the shielding plate 107 upwards, aligning the discharge through-hole 108 on the shielding plate 107 with the discharge port 105 on the discharge cover 104. This allows the sand and gravel to be discharged from the shielding plate 107 and the discharge port 105 using centrifugal force, achieving the discharge of sand and gravel from different positions on the grading screen plate 111 without manual cleaning, resulting in higher work efficiency.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 grit particle sizing device, characterized by, include: The vibrating screen includes a grading tank (100), a plurality of grading screen plates (111) spaced apart in the vertical direction, and a vibration mechanism installed at the bottom of the grading tank (100); The cleaning mechanism includes a roller (113) located at the bottom of the grading screen plate (111) and capable of rolling along the annular trajectory at the bottom of the grading screen plate (111), and multiple sets of ejector pins (114) arranged in an annular array on the outer peripheral wall of the rotating shaft (110), so that when the roller (113) rotates, it drives each set of ejector pins (114) to insert into the screen holes on the grading screen plate (111).

2. The sand and gravel particle grading device according to claim 1, characterized in that, The sieve holes on the grading sieve plate (111) are in multiple groups and arranged in a ring array, and each group of sieve holes consists of multiple holes and is distributed at intervals along a straight line toward the center of the grading sieve plate (111).

3. The sand and gravel particle grading device according to claim 2, characterized in that, A rotating shaft (110) is rotatably connected to the middle of the inner cavity of the grading tank (100). A drive motor (109) for driving the rotating shaft (110) to rotate is fixedly connected to the top of the grading tank (100). The outer wall of the rotating shaft (110) is rotatably connected to the middle of a plurality of grading screens (111). One end of the roller (113) is rotatably connected to the outer wall of the rotating shaft (110). A transmission assembly is provided between the other end of the roller (113) and the inner wall of the grading tank (100), so that the roller (113) rotates while rotating with the rotating shaft (110).

4. The sand and gravel particle grading device according to claim 3, characterized in that, The transmission assembly includes: A connecting shaft (117) is fixedly connected to one end of the roller (113) away from the rotating shaft (110); A bevel gear (118) is fixedly sleeved on the end of the connecting shaft (117) away from the roller (113); The annular bevel tooth (119) is fixedly connected to the outer side of the bottom end of the grading sieve plate (111), and the bottom of the outer wall of the annular bevel tooth (119) meshes with the top of the side wall of the bevel gear (118).

5. The sand and gravel particle grading device according to claim 4, characterized in that, An annular groove (115) is provided on the inner wall of the grading tank (100) and below the grading screen plate (111). A slider (116) is slidably connected in the annular groove (115). The middle part of the side wall of the slider (116) is rotatably connected to the end of the feeding plate (112) away from the roller (113).

6. The sand and gravel particle grading device according to claim 1, characterized in that, The vibration mechanism includes: A base plate (102) is located directly below the grading tank (100), and a plurality of support springs (103) are fixedly connected between the base plate (102) and the grading tank (100). A vibration motor is fixedly installed at the bottom of the grading tank (100).

7. The sand and gravel particle grading device according to claim 1, characterized in that, The top of the grading tank (100) is fixedly connected to the inlet (101), and the side wall of the grading tank (100) is provided with a discharge component for the separate discharge of sand and gravel from the grading screen plate (111).

8. A sand and gravel particle grading device according to claim 7, characterized in that, The discharge assembly includes: The discharge hood (104) is fixedly connected to the side wall of the grading tank (100). The side wall of the discharge hood (104) and the top position of the grading screen plate (111) are provided with a discharge port (105) that communicates with the inside of the grading tank (100). A shielding plate (107) is slidably connected to the inside of the discharge hood (104) on the side near the grading tank (100). The shielding plate (107) is provided with a plurality of discharge through holes (108) spaced apart from top to bottom. An electric lifting rod (106) for driving the shielding plate (107) to rise and fall is fixedly connected to the top of the discharge hood (104).

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