JPH0685423U - Blockage prevention screen - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent foreign matter from clogging the openings of the fine screen in the automatic dust remover. [Structure] A separately manufactured fitting member 2 having a U-shaped cross section is fitted to the inflow side of a flat screen bar base material 1 of a bar screen of an automatic dust remover to be integrated. As a result, the opening size of the screen on the outflow side is increased. This simplifies the production and shortens the delivery period, further prevents thermal distortion to improve the quality, and reuses it only by replacing the fitting member when worn.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clogging prevention type screen that can easily manufacture a bar screen that prevents foreign matter from clogging the openings of a fine screen in an automatic dust remover.

[0002]

[Prior art]

 In the automatic dust remover, the screen is placed so as to block the water channel, and the residue is captured and scraped by a rake to be discharged. This screen is generally made up of a large number of rolled materials arranged at required mesh intervals, which are constructed by welding combinations or distance spices and bolts. In fine screens, foreign matter becomes clogged in the openings, increasing the outflow resistance. In order to prevent this, some screen bars have a special cross-sectional shape as shown in FIGS.

[0003]

[Problems to be solved by the device]

 Conventionally, in order to prevent foreign substances from clogging the clogging part of the bar screen and increasing the outflow resistance, the cross section of the screen bar used for the bar screen has a modified cross section as shown in FIG. In order to manufacture by rolling, etc., rolling rollers etc. are made to order, and as shown in Fig. 4, since two members are welded and manufactured, it takes a long time from order receipt to delivery. In addition, there are drawbacks such as high price. Further, as shown in FIG. 4, in the case of the welding type, distortion due to welding heat, welding defects, etc. occur, which requires a great deal of labor, and it is difficult to obtain a high quality product. Furthermore, if the bar screen becomes worn due to use, it must be replaced with a new one.

An object of the present invention is to construct a separately manufactured mold steel on the inflow side of the screen bar base material so as to increase the outflow side opening dimension.

[0005]

[Means for Solving the Problems] The present invention has been made to achieve the above object, and in a berth cleaner of an automatic dust remover, a cross-section coil separately manufactured is provided on the inflow side of a flat screen bar base material. The gist is that the fitting member having a letter shape is fitted and integrated, and the opening size of the screen on the outflow side is increased.

[0006]

[Work]

 A flat bar with the required thickness and width is used as the screen bar base material, and a fitting member with a groove, such as a U-shaped cross section, is fitted to this to reduce the opening size of the inflow side of the screen A bar screen is constructed by arranging a large number of side openings so that the side opening size is large. This simplifies manufacturing, shortens the delivery period, and further prevents thermal strain to improve quality, and when worn, it can be reused by simply replacing the fitting member.

[0007]

【Example】

 The blockage prevention type screen of the present invention will be described with reference to the illustrated embodiment. In the figure, 1 is a screen bar base material made of flat steel having a material and shape suitable for constructing a bar screen, that is, a plate thickness / width. A cross-sectional shape and dimensions are provided according to the size.

At the screen inflow side end of the screen bar base material 1, a fitting member 2 having a U-shaped cross section and other grooves is integrally fitted over the entire length of the screen bar base material. The fitting member 2 has the screen opening side opening size of the screen bar base material 1 which is arranged in parallel next to each other at a required interval smaller than the outflow side opening size and has a predetermined screen opening width interval. Then, the plate thickness and the fitting length to the screen bar base material are determined.

Then, the fitting member 2 comes into contact with the residue on the rake 3 that moves up and down along the screen, and is worn by the sliding of the rake. In order to suppress this wear, a material having higher wear resistance than the screen bar base material 1 may be used.

The fitting member 2 is tightly fitted to the end portion of the screen bar base material on the inflow side to be integrated, or is fixed to this by a combination with spot welding or the like to prevent sliding of the rake. Also try not to let go of delusion.

Further, the fitting member 2 may have a trapezoidal shape in which the width of the inflow side end of the screen is large in addition to the U-shaped cross section as shown in the figure, or a cylindrical shape having a screen bar extending in the longitudinal direction of one side surface thereof. Various shapes can be adopted, such as a groove in which a base material is fitted.

Therefore, the screen bar base materials 1 fitted with the fitting members 2 are arranged in parallel at predetermined intervals to form a bar screen. At this time, the inflow side of the screen has a required screen opening size (opening width) from the fitting base material, and the screen outflow side opening size is larger than this, so that a fine screen can be easily constructed.

As described above, since the inflow side opening of the fine screen is smaller than the outflow side opening, even if foreign matter is captured on the inflow side, it is difficult for the fine screen to be clogged and the outflow resistance of the screen is increased. In addition to being able to prevent it, the screen residue captured on this screen is scraped by the rake scraper of the dust remover installed in the waterway.

As a result, the screen residue and the rake slide on the inflow side surface of the screen and the screen surface wears, but even in this case, the entire screen can be reused by replacing the fitting portion without replacing the entire screen. Will be things.

[0015]

[Effect of device]

 The clogging prevention type screen of the present invention is a bar screen of an automatic dust remover, in which a separately manufactured fitting member having a U-shaped cross section is fitted to the inflow side of the flat screen bar base material, and the outflow of the screen is achieved. Since the side opening size is configured to be large, even a bar screen with a small screen inflow side opening size can be easily manufactured with high precision without distortion and the delivery time can be shortened. Further, even if wear occurs, there is an advantage that it can be reused only by replacing the fitting member, which is economical.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a blockage prevention screen according to the present invention.

FIG. 2 is an overall explanatory view of the present invention.

FIG. 3 is an explanatory diagram of a known rolling type example.

FIG. 4 is an explanatory view of a known welding type example.

[Explanation of symbols]

 1 Screen bar base material 2 Fitting member 3 Rake

Claims (1)

[Scope of utility model registration request] 1. In a bar screen of an automatic dust remover,
A blocking prevention type screen in which a separately manufactured fitting member having a U-shaped cross section is fitted and integrated into the inflow side of a flat screen bar base material to increase the opening size of the outflow side of the screen.