JPS6032945Y2 - Dehydrator filter cloth tensioning device - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a rotating shaft that passes through a tensioning roller for an endless band-shaped filter cloth so as to be relatively rotatable, a pinion gear is attached to both ends of the rotating shaft, and a rack gear meshes with the pinion gear. The present invention relates to a filter cloth tensioning device for a dehydrator, in which a member for rotatably supporting the rotating shaft is movably provided on a guide extending in the moving direction of the roller.

As shown in FIG. 4, the above-mentioned device has generally been
The filter cloth tensioning roller 51 is rotatably supported by a rotating shaft 52 passing through it via a first bearing 53, 53, and both ends of the rotating shaft 52 are supported by a second bearing 54.
．． supported by a support member 55.55 via 54, and
Support members 55,55 were provided on the guides 56, 56 so as to be freely displaceable in the direction of movement of the roller 51.

However, due to the tension stress from the filter cloth 57 being transmitted to the rotating shaft 52 via the roller 51 and the first bearing 53.53, the rotating shaft 52 is deflected about the support position by the second bearing 54.54 as a fulcrum. However, as a result, a large angular misalignment occurs between the roller 51 and the rotating shaft 52, and in the first bearing 53, 53, the roller 51 rotates in a large meandering manner on the raceway surface, causing a large abnormal noise. However, it had the disadvantage of premature wear.

Therefore, as shown in FIG.
It was devised to support each of the bearing members 63, 63 via the first and second bearings 64, 64, 65, 65, respectively, thereby making it possible to prevent both abnormal noise and early wear and tear. However, the first and second bearings 64
．． In order to incorporate the support member 65, the support member 63 must be manufactured by special processing, which has the disadvantage of being extremely expensive.

Furthermore, assembling the first and second bearings 64,65 was also a rather troublesome task.

In view of the above points, it is an object of the present invention to provide a bearing that can prevent both the generation of abnormal noise and early wear and tear, and that can be manufactured inexpensively and easily using an off-the-shelf bearing member.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

The material to be treated is supplied from the first storage tank 1 and the second storage tank 2
A mixer 3 is provided to coagulate and mix the flocculant supplied from the
A gravity dewatering section 7 is formed between the endless strip-shaped first filter cloth 4, the case side wall 5, and the partition wall 6, and the gravity dewatering section 7 supplies the agglomerated product from the mixer 3 and filters water by gravity.
A cake thickness adjusting roll 8 as an example of an adjusting device for adjusting the thickness of the cake fed out on the first rotating filter cloth 4 is provided on the lower side of the gravity dewatering section 7 in the rotation direction of the filter cloth 4,
And on the lower side, between the first rotary filter cloth 4,
A second rotary filter cloth 9 is provided to pinch the cake whose thickness has been adjusted, and a light pressure dehydration zone A with a linear path, a compression dehydration zone B1 with a large diameter arc path, and a shear dehydration zone C with a meandering path are provided. With the rotation of the first filter cloth 4 from the gravity dewatering section 7 to the forced dewatering section 10, water is removed during various water treatment such as human waste, urban sewage, or industrial wastewater. The dewatering machine is designed to continuously dewater the materials to be treated such as sludge generated by the process.

A filter cloth tensioning device 11.11 is attached to each of the first and second filter cloths 4, 9 in the middle of their rotation path, so that the first and second filter cloths 4, 9 can be tightened regardless of changes in the thickness of the object to be treated. , 9 are designed to add tension to each of them.

To configure the filter cloth tensioning device 11, both ends of the tensioning roller 12 for the filter cloth 4 are rotatably supported by a support member 14 via a ball bearing 13.
4.14 are movably attached to guides 15 extending in the direction of movement of rollers 12 for tensioning the filter cloth 4, and a pair of left and right frames 16° 16 to which the guides 15.15 are attached and the support member. The air cylinders 17 are interlocked and connected to each other.

A rotating shaft 18 is provided passing through the roller 12, and
In the axial direction of the rotating shaft 18, near a location corresponding to the support position by the ball bearing 13.13,
Spherical sliding bearings 19, 19 are provided between the rotating shaft 18 and the roller 12 at a slightly outer location, and pinion gears 20 are attached to each end of the rotating shaft 18 so as to be integrally rotatable. Rack gear 2 that engages
1 and 21 are respectively provided on the frame 16 and 16, and the rollers 12 are moved in the filter cloth tensioning direction while synchronizing the amount of movement in the left and right directions.

The second filter cloth 9 also has the same configuration as the first filter cloth 4.

In summary, the present invention provides the above-mentioned filter cloth tensioning device for a dehydrator, in which the roller 12 is supported by the support member 14 via a ball bearing 13, and the roller 12 and the rotating shaft 18 are , a spherical sliding bearing 19 is interposed at a position corresponding to or near the position supported by the ball bearing 13 in the axial direction of the rotating shaft 18.

In other words, the roller 12 is supported by the support member 14.14 via the ball bearing 13.13, and the tension stress from the filter cloth 4 transmitted via the roller 12 is directly received by the support member 14.14. The force applied to the rotating shaft 18 can be reduced, and bending and deformation of the rotating shaft 18 due to tension stress from the filter cloth 4 can be prevented, thereby making it possible to prevent both abnormal noise and early wear and tear.

Moreover, in order to allow relative rotation between the rotating shaft 18 and the roller 12, a spherical sliding bearing 19.1 is mounted between the two 12.18.
Since 9 is interposed, 1 for each support member 14 and 14.
It is only necessary to incorporate the ball bearings 13, and as the support member 14, a ready-made commercially available product can be used without any special processing, and both the generation of abnormal noise and early wear and tear can be prevented. However, it has become possible to manufacture filter cloth tensioning devices at low cost.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the filter cloth tensioning device for a dehydrator according to the present invention, and FIG. 1 is a schematic vertical sectional view of the entire belt press type dehydrator, FIG. 2 is a sectional view of the filter cloth tensioning roller, and FIG. 3 is a plan view of the tensioning device, FIG. 4 is a sectional view of a cloth tensioning roller showing a conventional structure, and FIG. 5 is a sectional view of a cloth tensioning roller showing a comparative example. 4...Filter cloth, 12...Roller, 13.
... Ball bearing, 14 ... Support member, 15 ... Guide, 18 ... Rotating shaft, 19 ... Spherical sliding bearing, 20.・・・・・・
Pinion gear, 21... Rack gear.

Claims (1)

[Scope of utility model registration request] A rotating shaft 18 is provided so as to be able to rotate freely relative to the tensioning roller 12 for the endless belt-shaped filter cloth 4. A pinion gear 20 is attached to both ends of the rotating shaft 18, and a rack gear 21 that engages with the pinion gear 20 is connected to the roller 12. A filter cloth tensioning device for a dehydrator, in which a member 14 extending in the moving direction of the roller 12 and rotatably supporting the rotating shaft 18 is movably provided on a guide 15 extending in the moving direction of the roller 12. , the roller 12 is supported by the support member 14 via a ball bearing 13, and the roller 12 is positioned between the roller 12 and the rotating shaft 18 in a supported position by the ball bearing 13 in the axial direction of the rotating shaft 18. A filter cloth tensioning device for a dehydrator, characterized in that a spherical sliding bearing 19 is installed at or near a corresponding location.