Gravel sieving device capable of conveniently adjusting sieving sizes
A screening device and size technology, applied in the direction of filter screen, solid separation, grille, etc., can solve the problems of time-consuming, troublesome operation, decreased work efficiency, etc., and achieve the effect of improving screening efficiency, convenient operation and strong practicability
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[0024] Example 1
[0025] See Figure 1~3 In the embodiment of the present invention, a sand and gravel screening device that is convenient to adjust the screening size includes a screening box 1 and a screen. The top of the screening box 1 is provided with a hopper 6 and the bottom of one side of the screening box 1 There is a first discharging pipe 14. The bottom of the screening box 1 is set diagonally downward to the side close to the first discharging pipe 14, which is convenient for discharging. The bottom of the screening box 1 is installed with supporting legs evenly and symmetrically, and the bottom of the supporting legs is installed There are rollers 13, the rollers 13 are self-locking rollers, which facilitate the movement of the device. Two sets of screen components are installed up and down in the screening box 1. The screen components include a multi-size screen 4 and a winding roller 2. There are two winding rollers 2 and they are respectively arranged on the out...
Example Embodiment
[0029] Example 2
[0030] See Figure 4 The difference between the embodiment of the present invention and the first embodiment is that, in order to ensure sufficient screening, a knockback mechanism is installed at the second discharge pipe 3. The knockback mechanism includes a second motor 16, an incomplete gear 17. The rack 19, the second spring 18 and the striking plate 20. The second motor 16 is installed on the end of the second discharge pipe 3 away from the screening box 1, and the second discharge pipe 3 is away from the end of the screening box 1. A discharge port is provided at the bottom, an incomplete gear 17 is installed on the output shaft of the second motor 16, and a rack 19 engaged with the incomplete gear 17 is installed under the incomplete gear 17, and the rack 19 is slidably connected to the second discharge pipe 3. The end of the rack 19 located in the second discharge pipe 3 is fixedly installed with a beater plate 20. A second spring 18 is fixedly connect...
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