JPH0514216U - Dust remover - Google Patents

Abstract

(57) [Summary] [Purpose] To block outflow of dust from the bottom edge of the screen. [Structure] Guide rollers 14 are rotatably provided on both sides of the bar screen 11, and an endless chain 15 is supported by the guide rollers 14. Further, a drive sprocket 17 and a driven sprocket 18 for hooking a chain 15 are provided outside the guide roller 14, and a rake 19 for discharging dust is provided on the chain 15.
Then, an auxiliary screen 24 is erected so that the spring 27 urges it toward the rake 19 and its upper end reaches the guide roller 14. [Effect] Since the auxiliary screen 24 is erected so as to cover the lower front surface 23 of the bar screen 11, the auxiliary screen 24
Outflow of dust on the further downstream side is suppressed, and the dust is quickly scraped up by the rake 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust remover in which dust collected by a bar screen provided in a waterway such as an irrigation canal and a drainage can be picked up and discharged by a rake device.

[0002]

[Prior Art]

 Conventionally, in this type of dust remover, vertical grid-like screens are installed diagonally over the entire width of the water channel, and endless chains are mounted on rotatable drive and driven sprockets provided on both sides of this screen. At the same time, it is configured by suspending an appropriate number of rakes having a claw at the tip between endless chains. By connecting a drive source such as a water turbine or an electric motor to the drive sprocket and a connecting mechanism, the rotational force of the drive sprocket is transmitted to the endless chain, which causes the rake to collect dirt and dust on the screen. It raises and rises along the screen while picking up, then reverses to the back side of the screen and discharges dust and debris to the discharge conveyor, descends again into the water and circulates.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional example, since the rake suspended on the endless chain circulates while passing between the driven sprocket at the lower end of the screen and the bottom surface of the water channel, dust is collected downstream from the lower end of the screen. There was a problem in that not only did the driven sprocket move poorly due to runoff and the accumulation of dirt and dust on the bottom of the waterway, but also the loss of waterway resulting in extremely low dust removal efficiency.

An object of the present invention is to solve the above problems and provide a dust remover capable of completely blocking outflow of dirt and dust from the lower end of a screen.

[0005]

[Means for Solving the Problems]

 The present invention is a screen installed in a waterway, a pair of rotatable sprockets installed on both sides of the screen, an endless chain hung on each sprocket, and attached to this chain to be captured by the screen. A rake that discharges dust and dirt is erected on the lower front surface of the screen so as to be urged toward the rake side by an elastic member, and its upper end is at least higher than the upper end of the sprocket provided on the lower side. And an auxiliary screen formed as described above.

[0006]

[Action]

 With the above construction, the dust between the lower end of the screen and the bottom of the water channel is prevented from flowing out to the downstream by the auxiliary screen, and is quickly picked up by the rake attached to the rotating chain.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 show a first embodiment of the present invention, in which reference numeral 11 denotes a vertical grid bar screen supported by a frame 12, which is inclined over the entire width of the water channel A. It is provided. A front plate 13 of the frame 12 is formed on both sides of the bar screen 11 along the bar screen 11, and guide rollers 14 made of resin such as MC nylon are formed at substantially equal intervals on the front plate 13. It is rotatably installed. Reference numeral 15 denotes a pair of endless chains located on both sides of the bar screen 11 and guided and supported by the guide rollers 14. The chains 15 are provided outside the guide rollers 14 and are installed above the water channel A, respectively. Is mounted between a drive sprocket 17 connected to a motor 16 and a driven sprocket 18 provided at the bottom of the water channel A, and a proper number of rakes 19 serving as scraping bodies are fixed to the chain 15. Driven by the motor 16, the rake 19 rises along the berth clean 11 via the chain 15, and the rake 19 scrapes up the dust trapped on the bar screen 11 and drops it onto the discharge conveyor 20. ing.

An apron 21 is provided on the top of the bar screen 11, and a lower end 22 of the bar screen 11 is arranged with a space from the bottom of the water channel A to allow the rake 19 to pass therethrough. ing. In order to prevent dust and the like from flowing out between the lower end 22 and the bottom of the water channel A, an auxiliary screen 24 is provided on the lower front surface 23 of the bar screen 11, and the auxiliary screen 24 is a base. It is fixed to a support shaft 26 that is rotatably mounted on the shaft 25, and has an acute-angled upper end that is at least longer than the driven sprocket 18 and is formed in a vertical lattice shape so as to reach the guide roller 14. Has been formed. In addition, the auxiliary screen 24 engages with the rake 19 in which the auxiliary screen 24 circulates at the end of the support shaft 26, so that the auxiliary screen 24 accumulates elastic force and escapes, and is automatically returned by disengagement. A spring 27 is provided on the 19 side to urge the elastic force. The spring 27 is a coil spring, one end of which is connected to the base 25, and the other end of which is connected to a locking piece 24 a formed to project from one side of the auxiliary screen 24. A stopper 28 that engages with the base 25 extends from the lower end of one side.

Next, the operation of the above configuration will be described.

By applying a predetermined voltage to the motor 16 to cause rotation, this rotational force is transmitted to the chain 15 and the rake 19 via the drive sprocket 17 connected to the motor 16. The rake 19 rises along the screen bar 11 while picking up dust accumulated on the bar screen 11, and then reverses it from the apron 21 to the back side of the bar screen 11 to discharge the dust onto the discharge conveyor 20. It descends into the water again and circulates. On the other hand, the dirt and dust that try to flow to the downstream side from between the lower end portion 22 of the bar screen 11 and the bottom portion of the water channel A are caught by the auxiliary screen 24, and the downstream flow is blocked. Further, when the rake 19 circulates and reaches the lower end 22 of the bar screen 11, the rake 19 and the auxiliary screen 24 engage with each other, and the auxiliary screen 24 accumulates the restoring force of the spring 27 and moves outside the bar screen 11. The rake 19 inclines toward the side, and the rake 19 scrapes up the dust and the dust is quickly removed.

As described above, according to the above-described embodiment, since the upper end of the auxiliary screen 24 is higher than at least the upper end of the driven sprocket 18 and reaches the guide roller 14, the driven sprocket is driven by the auxiliary screen 24. It is possible to completely block the dust that flows out to 18 and the downstream side, and further, it is possible to quickly remove the dust by the rake 19. Therefore, as in the case of the conventional example, the movement of the driven sprocket 18 is deteriorated due to the adhesion of the dirt and dust flowing out toward the downstream side, and the sediment is easily settled on the bottom surface of the water channel A, resulting in the water channel loss and the dust removal The problem of low efficiency is eliminated.

3 and 4 show a second embodiment of the present invention, in which a bar screen 31 is obliquely installed in a water channel A, and drive sprockets 32 are provided on both sides of the bar screen 31. In addition to the endless chain 34 being mounted on the driven sprocket 33, a plurality of rakes 35 for discharging the dust captured by the bar screen 31 are attached to the endless chain 34, and the bottom part of the bar screen 31 is attached. On the front surface 36, an auxiliary screen 38 having a stopper 37 formed at the bottom is erected. Then, by suspending the spring 39, which is an elastic member, between the substantial center of the auxiliary screen 37 and the support plate 41 disposed between the bar screen 31 and the screen frame 40, dust collected near the support shaft 42 is removed. Even if it adheres, there is no risk that the spring 39 will lose its resilience, so after the rake 35 has passed the auxiliary screen 38, the auxiliary screen 38 is reliably urged toward the rake 35 side and the bar screen 31 It is possible to completely prevent outflow of dust and dirt from the lower end portion 43.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the number and shape of the rakes are the flow rate of the water channel and the sediment. It may be appropriately selected according to the accumulated amount of

[0014]

[Effect of the device]

 The present invention is a screen installed in a waterway, a pair of rotatable sprockets installed on both sides of the screen, an endless chain hung on each sprocket, and attached to this chain to be captured by the screen. A rake that discharges dust and dirt is erected on the lower front surface of the screen so as to be urged toward the rake side by an elastic member, and its upper end is at least higher than the upper end of the sprocket provided on the lower side. It is possible to provide a dust remover capable of completely blocking the outflow of dirt and dust from the lower end portion of the screen, which is provided with an auxiliary screen formed as described above.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing a second embodiment.

FIG. 4 is a side view of the same.

[Explanation of symbols]

 11,31 Bar screen (screen) 15,34 Chain 17,32 Drive sprocket (sprocket) 18,33 Driven sprocket (sprocket) 24,38 Auxiliary screen 27,39 Spring (elastic member) A Waterway

Claims (1)

[Scope of utility model registration request] 1. A screen provided in a water channel, a pair of rotatable sprockets provided on both sides of the screen, an endless chain hung on each sprocket, and a screen mounted on the chain. A rake for discharging the trapped dust and a bottom front surface of the screen erected by an elastic member so as to urge the rake side, and the upper end thereof is at least higher than the upper end of the sprocket provided on the lower side. A dust remover comprising an auxiliary screen formed as described above.