JPS6087998A - Device for preventing slack of filter cloth for belt press - Google Patents

Abstract

PURPOSE:To enable prevention of the slack of filter cloths by providing a braking device to the roller of a press having the upper and lower filter cloths which are wound on many rollers and dehydrate sludge while grasping the sludge therebetween and hunting. CONSTITUTION:The sludge to be treated is grasped between upper and lower endless traveling filter cloths 2, 3 wound on many rollers 1 and is dehydrated during hunting and traveling of the filter cloths. A braking device 5 which brakes the rotation of the device itself or of a roller shaft 4 is provided to an optional roller (usually a driven roller) 1a just before generation of a slack S in the filter cloths of the roller 1. If the slack S arises, the device 5 is actuated to brake the roller 1a. Then the cloths 2, 3 are slipped forcibly on the roller 1a. The cloth 3 is thus returned more excessively than 2 or the cloth 2 is returned earlier than 2 by which the generated slack S is corrected and the need for stopping the operation, resetting the filter cloths, etc. as in the prior art is thoroughly eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fabric slack prevention device for a belt press that prevents the fabric from loosening by controlling the rotation of a roller using a braking device when the fabric loosens.

Recently, belt presses have been adopted as a means of dewatering sludge generated in sewage treatment plants, etc., but in this case, if the quality of the sludge is appropriate, the P cloth may become loose during dewatering operation. In most cases, it resolves naturally with a small amount. However, for example, if the sludge hardens easily and is difficult to slip, or conversely if it is mushy and slippery, a deviation that exceeds the limit will occur between the upper and lower P cloths, and this deviation will not be absorbed naturally. In this way, if a deviation that exceeds the limit occurs and the f-fabric roughness becomes excessive, there is a risk that the r-fabric will meander or the P-fabric will be damaged. It was necessary to take measures such as removing the hook and fixing the hook.

This invention was made to solve the above-mentioned drawbacks, and the reason for the slackness is that the tension is not applied to the part where the slackness occurs (and the fabric does not slip on the roller in front of this). It is an object of the present invention to provide a fabric sag prevention device for a belt press that forcibly slips one piece of fabric and prevents it from loosening by braking the front roller.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in the main part configuration diagram in Figure 1, the sludge to be treated is
It is held between an endless traveling cloth 2.degree. 3 wound around a large number of rollers (only a part of which is shown in the figure) 1, and is dehydrated during meandering travel.

Then, as shown in FIGS. 1 to 3, an arbitrary roller (usually a driven roller) la just before f of the roller 1 causes the fabric scraping S is controlled to rotate the roller 1a itself or the roller shaft 4. A braking device 5 is provided.

5. In addition to a brake such as a brake drum or a clutch (not shown) as shown in FIGS. 2 and 3, a brake device that can reliably control the rotation of the roller 1a is also provided. It can be anything.

Note that a detection means 6 such as a photoelectric sensor that automatically detects the slack S of the 1,7-I cloth and activates the braking device 5 may be provided near the cloth 2.3.

According to the above configuration, when the loose fabric smear S does not occur, the braking device 5 is held in a free state with respect to the roller 1a or the roller shaft 4, and the roller 1a has the f1 fabrics 2 and 3.
Only the fFA movement is generated and the sludge is dehydrated while meandering.

However, as shown in Fig. 1, if f1 fabric slack S occurs in one of the loose fabrics 2 and 3, the braking device 5 consisting of a brake, a clutch, etc. is activated, and f1 fabric slack S occurs. If you brake the roller 1a in front of the
is forcibly slipped on the roller 1a. As a result, the lower f-cloth 3 may be returned more than the upper f-cloth 2 (if the sludge is difficult to slip), or the upper f-cloth 2 may be returned earlier than the lower f-cloth 3 (if the sludge is slippery). As a result, the r-fabric sag S that has occurred is automatically corrected, and there is no need to stop the operation or fix the f-fabric hanging as in the past.

As described above, according to the present invention, by braking the rotation of the roller using the braking device, there are extremely excellent effects such as forcibly slipping the F fabric and automatically preventing the P fabric from slipping.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of the present invention, and FIGS. 2 and 3 are sectional views showing the arrangement of a braking device. 1.1a...roller, 2,3...sawa cloth, 4...roller shaft, 5...braking device. Procedural Amendment (Voluntary) July 1, 1980 To the Commissioner of the Japan Patent Office 1. Indication of Tenancy Patent Application No. 194525 2. Title of Invention: Belt Press R Fabric Rubbing Prevention Device 3. Person Making the Amendment Name Nishihara Environmental Health Research Institute Co., Ltd. 5, subject to amendment

Claims (1)

[Claims] a pair of endless upper and lower F cloths that are wound around a number of rollers and dewater the sludge while holding and meandering; and a braking device that controls the rotation of at least one of the rollers to prevent the P cloth from loosening. Belt press F fabric smear prevention device equipped with.