JPS6346086Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the delivery of strip filter media to a horizontal filter of strip filter media feeding type.

Generally, the horizontal filter A of the belt-shaped filter medium feeding type is
As shown in the perspective view in the figure, it mainly consists of a lower body 1 attached to an upper cover 2 provided on an upper wall at a slurry supply port 3 so as to be openable and closable with one end as a pivot. The slurry is filtered and dehydrated by pressurized aeration in batches by a belt-shaped filter medium 4 made of filter paper or filter cloth, etc., which is pulled out from a reel 5 wound in a roll shape on the lower filter main body 1 and supplied, and the slurry is filtered and dehydrated by pressurized aeration in batches. The cake 6 is transferred in the direction of the arrow while being held on the band-shaped filter medium 4, and then transferred to the knife 7.
At the same time, the filter medium 4 is scraped off and wound onto a winding roll 8. On the other hand, the filtrate is discharged from a filtrate discharge port (not shown) of the lower main body 1, and a new filter medium is drawn out to the filter A to perform the next filtration operation in batches.

In such a belt-shaped filter medium feeding type filtration system, the belt-shaped filter medium 4 is fed out by a pull-out roller 10 driven and rotated by a motor 11 on the filter medium outlet side from the filter machine A, and a presser foot provided adjacent to the pull-out roller 10. This is done by rollers 12. Therefore, in the conventional control of feeding out the filter medium 4, the filter medium pull-out roller 10, which rotates at a constant speed, is operated for a certain period of time using a timer so as to be linked to the batch filtration operation of the slurry by the filter machine A, and the filter medium 4 is pulled out. It was done by this.

However, in the conventional timer-based feeding control means for the filter medium 4, an overload is added due to some abnormality based on the filtration operation, and the filter medium 4 is overloaded.
Even if an abnormality in feeding of the filter medium 4 occurs, such as slipping on the pull-out roller 10 or breakage of the filter medium 4 on the pull-out roller or on the way to the pull-out roller 10, there was no means to detect this. As a result of the filtration operation by filter A continuing to be performed in batches by timer operation etc. while the feed abnormality still existed in filter 4, Cool 6 was caught in the seal part between the upper lid 2 and lower body 1 of filter A. A filtration operation may be performed. In such a case, there was a risk that the slurry stock solution would blow out from the filter A or cake would leak out to the filtrate side due to a seal failure in the filter A.

The present invention focuses on the shortcomings of the conventional filter media feeding means, and is designed to prevent such shortcomings and promptly detect the abnormality when feeding abnormality such as slipping or cutting of the filter material occurs, especially on the filter media drawer side of the filter machine. The purpose of this invention is to provide a belt-shaped filter media delivery control device that can immediately stop the supply of filter media to the filter and prevent the filter from proceeding to the next cycle, thereby preventing troubles with the filter.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 4.

In FIG. 1, B shows an outline of the belt-shaped filter feeding control device of the present invention, in which a detection roller 13 that rotates in conjunction with the feeding of the filter media 4 is pressed by a pressing roller 14 on the supply side of the belt-shaped filter media 4 to the filter machine A. A detection dog 15 that rotates integrally with the rotation of the detection roller 13 is directly connected and fixed to one end of the rotation shaft of the detection roller 13, and its rotation speed is detected in synchronization with the rotation of the detection dog 15. The detector 16 is connected to the detection dog 15, and the detector 16 is connected to a counter such as a preset counter (not shown). This counter is connected to a drive source for the filter medium pull-out roller 10, etc., as necessary.

Fig. 2 is a plan view of the detection unit that constitutes the main part of the control device of the present invention, Fig. 3 is a front view of Fig. 2, and Fig. 4 is a detailed sectional view of the filter medium supply section to filter machine A. .

In the figure, reference numeral 13 denotes a detection roller for the filter medium 4 which is rotatably supported by a support plate 18, and a detection dog 15 is directly connected to one end of the roller through a bearing 17.

The detection dog 15 has one or more protrusions 15a on the outer periphery.
It may be a rotating body with symmetrical or evenly spaced protrusions 1 on the outer periphery of a disc as shown in Figure 1.
5a may be provided at symmetrical positions, or may be a rod-shaped rotating body as shown in FIG.

A detector 16 is installed on the support 18 adjacent to the detection dog 15, and may be of any type as long as it can detect the rotation speed of the detection dog 15. Detection dog 1
A limit switch provided with a knob 16a that abuts the detection dog 5, a photoelectric detector that photoelectrically detects the rotation speed of the detection dog, that is, the rotation speed of the detection roller 13, or the like may be used.

Reference numeral 14 denotes a presser roller rotatably supported by a support 19 that is rotatable around a pin 22. This presser roller 14 clamps the filter medium 4 on the detection roller 13, and as the filter medium 4 is fed, the detection roller 13 is formed in a superimposed manner such that it is rotatable, or the support 19
The filter medium 4 may be held between the detection roller 13 and the presser roller 14 by connecting the support plate 18 with a coil spring (not shown).

The filter medium 4 is set on the detection roller 13 using the pin 22.
This is done after releasing the load on the presser roller 14 by rotating the presser roller 14 upward together with the support 19 using the pin 22 as a spindle, and after setting the filter medium 4, support the presser roller 14 again using the pin 22 as a spindle. The press roller 14 is rotated together with the body 19 to detect the detection roller 13.
This is done by placing it on top. This presser roller 14 has a plurality of discs 1 on the outer periphery of a central shaft 14a.
4b may be arranged in a ring to form a multi-disk structure. Further, reference numeral 20 denotes a tension bar for the filter medium 4, which is attached to the support plate 18 on the side of the detection roller 13 so as to be movable within the slit 21, and is used for adjusting the meandering of the filter medium 4. 23 is a support shaft for opening and closing the main body 1 of the filter A.

Next, to explain the operation of the present invention, the filter medium 4 supplied to the filter machine A is pulled out from the reel 5 wound into a roll by the rotation of the pull-out roller 10 that rotates at a constant speed. 4 is held between a detection roller 13 and a presser roller 14, and is supplied to the filter A in batches at a constant speed v.

Then, the detection roller 13 rotates following the feeding of the filter medium 4, and the detection dog 15 and its protrusion 15a are also rotated together with the detection roller 13. This rotation is transmitted to the detection part of the detector 16 through means such as the protrusion 15a coming into contact with the knob 16a of the detector 16,
By generating pulses such as ON-OFF signals, a preset counter and a timer electrically connected to the detector 16 are linked to detect whether or not there is an abnormality in the feeding of the filter medium 4.

That is, if the number of counts set on the preset counter is N, and the number of protrusions on the detection dog is n, then the amount L of filter medium fed out (feeded length) is expressed by the following equation.

L=π・D/n・N (however, D is the outer diameter of the detection roller 13) Also, if the withdrawal speed v of the filter medium 4 and the above-mentioned feed amount L are constant, v・t=L (however, t is the feed Since the time required to feed the filter medium is also constant due to the relationship between the number of filters (time), the preset counter does not count by the set number N within the time t required to feed the filter medium (actually, some margin time α is added). In this case, the filter medium 4 is not passing over the detection roller 13 at a constant speed, indicating that some kind of feeding abnormality has occurred in the filter medium.

As mentioned above, such filter media feeding abnormalities are caused by delays in feeding due to the filter media slipping on the pull-out roller 10 due to overload on the drawer side, feeding stops due to cutting of the filter media, lack of supply of filter media from the filter media supply reel 5, etc. However, if an abnormality in the feeding of these filter media is detected, the feeding of the filter media is controlled by means such as stopping the motor 11 of the filter media pull-out roller 10 that is linked to the count setting number of the preset counter. be able to.

In addition, when filtering a slurry that is easy to filter, such as non-compressible slurry, the filter medium 4 supplied to the filter machine A can be air-dried and used repeatedly without being washed or discarded after each use. When reusing such a filter medium with residual cake adhesion, install the filter medium 4 so that the cake adhering surface is on the outside, that is, on the upper side in the filter machine, to prevent cake from adhering to the detection roller 13. If the presser roller 14 that presses the cake-adhering surface of the presser roller 14 has the multi-disc structure described above, the cake is held in the groove between the disks 14b of the presser roller 14 and does not adhere to the outer periphery, so that the cake does not reach the detection roller 13. Abnormalities such as an increase in the feed rate of the filter medium due to adhesion, meandering of the filter medium or slipping of the detection roller 13 due to uneven cake adhesion to the roller surface can be prevented.

As described in detail above, the control device of the present invention has a detection dog fixed to one end of the rotating shaft on the belt-shaped filter medium supply side of the filter, and a detection roller that rotates in conjunction with the feeding of the belt-shaped filter medium. A rotation speed detector linked to the rotation is connected to the detection dog, and the detector is connected to a counter such as a preset counter.
Furthermore, since this is configured to control the feeding of the strip filter medium by means such as connecting it to the drive motor of the filter medium pull-out roller, it is possible to control the feeding of the filter medium by installing a simple detection section on the supply side of the filter medium, which was previously difficult to do. It has the advantage of being able to quickly detect feeding abnormalities and immediately stop the operation of the filter in the event of an abnormality, thereby preventing troubles that may occur in the filter.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a band-shaped filter medium feeding type filtration system incorporating the band-shaped filter medium delivery control device of the present invention, Fig. 2 is a plan view of the detection unit that constitutes the main part of the present invention, and Fig. 3 is the same. The front view, FIG. 4, shows a detailed sectional view of the filter medium supply section to the filter. 1...Lower filter body, 2...Top lid, 4...Filtering medium, 6...Cake, 7...Knife, 10...Drawer roller, 12...Press roller, 13...Detection roller, 14...Presser Roller, 15...detection dog, 16...rotation speed detector.

Claims (1)

[Scope of utility model registration request] A detection dog is fixed to one end of a rotating shaft on the belt-shaped filter medium supply side of the belt-shaped filter medium feeding type horizontal filter main body, and a detection roller that rotates in conjunction with the feeding of the band-shaped filter medium is provided, 1. A feeding control device for a band-shaped filter medium, characterized in that a rotation speed detector synchronized with the rotation of a detection dog is provided in series, and the feed-out of the band-shaped filter medium is controlled by the detector via a counter.