JPH0231125Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a dewatering machine that separates sludge water generated in a ready-mixed concrete manufacturing plant into sludge and clear liquid using a filter cloth.

(b) Prior art In a dehydrator that performs dewatering using a filter cloth,
If the structure of the dehydrator makes it impossible to completely remove the cake after dehydration, the filter cloth is bombarded with compressed air to facilitate the removal of the cake.
In this case, connect the hose connected to the compressed air source to the appropriate point in the dehydrator where compressed air needs to be introduced, open the valve provided in the middle of the hose as appropriate, and apply an impact of compressed air to the filter cloth to filter it out. The cake attached to the cloth is peeled off.

(c) Problems to be solved by the invention If a hose connected to a compressed air source is directly connected to the point where compressed air of the dehydrator needs to be introduced, the compressed air sent from the compressed air source can be introduced from one point. As a result, it was not possible to apply an even impact to the entire area of the filter cloth, and the cake sometimes remained in a portion without being peeled off.

In view of the above points, the present invention provides a dehydrator that can effectively impact a filter cloth with the minimum necessary amount of compressed air.

(d) Means for solving the problem The present invention consists of three divided bodies 2a, 2b, 2 whose joint surfaces are flat in the shape of a frame surrounded by a frame body.
A liquid feeding port 5 is provided on the side surface of the divided bodies 2a and 2c located on both sides of the screen, and a liquid drain port 6 is provided in the bottom surface of the divided body 2b located in the center. The intermediate body, which is integrated by stretching the fabric 4, is suspended via a support 11 fixed to a fixed base 10, and clamping bodies 3a and 3b are used to clamp the intermediate body 2 from both sides by cylinders 19. The undiluted solution is pressurized into a dehydration chamber 9 formed by the filter cloth 7 and the filter cloth 4 of the intermediate body 2 stretched between the clamping bodies 3a and 3b having lid-shaped clamping parts with the openings being flat. In a dehydrator for dewatering, an injection pipe 27 connected to a compressed air source is provided at a position above the centrally located split body 2b,
Injection holes 28 are arranged at appropriate intervals in the lower part of the injection pipe 27 so that the entire area of the filter cloth 4 can be uniformly bombarded with compressed air, and compressed air is introduced into the upper surface of the divided body 2b facing the injection holes 28. A perforation 29 is provided for this purpose.

(e) Effect In the present invention, when the piston rod 20 of the cylinder 19 is extended, the clamping bodies 3a and 3b clamp the intermediate body 2 consisting of three frame-shaped divided bodies from both sides, and tension the intermediate body 2. Filter cloth 4 and clamping body 3a,
A closed dehydration chamber 9 is formed between the filter cloths 7 stretched over the filter cloth 7, and the stock solution is pressurized into the dehydration chamber 9 from the liquid feed port 5. The injected stock solution is filtered by filter cloths 4 and 7, only moisture is discharged to the outside from drain ports 6 and 8, and filtered cake is accumulated in dehydration chamber 9. When the dehydration is completed, the piston rod 20 of the cylinder 19 is contracted, the clamping part 3c is moved back as shown in FIG. 3, and the valve provided in the middle of the pipe 26 connecting the compressed air source and the injection pipe 27 is opened. The compressed air is branched and injected from the injection hole 28 of the injection pipe 27. The compressed air ejected from the injection holes 28 entrains outside air and is introduced into the interior of the divided body 2b through the perforations 29 on the upper surface of the divided body 2b, and impacts the entire area of the filter cloth 4 almost uniformly, removing the cake attached to the filter cloth 4. It completely peels off.

(f) Example The dehydrator of the present invention will first be explained based on FIG. 4. 1 is a main body of the dehydrator of the dehydrator for concentrating and dehydrating a stock solution such as sludge water; It is composed of clamping bodies 3a and 3b that clamp 2 from both sides.

The intermediate body 2 is composed of three divided bodies 2a, 2b, 2 whose joint surface is a plane and has a frame shape surrounded by a frame body.
The filter cloth 4 is inserted and stretched between the joint surfaces of adjacent divided bodies, and the divided bodies 2a, 2b, and 2c are integrated with appropriate fasteners. Reference numeral 5 denotes a liquid feeding port for supplying the stock solution, which is drilled in the divided bodies 2a, 2c located on both sides of the three divided bodies 2a, 2b, 2c, and the stock solution is forced into the liquid supply port through a liquid feeding pipe (not shown). connected to a pump (not shown). Reference numeral 6 denotes a liquid drain hole formed in the centrally located divided body 2b, and after the stock solution press-ined from the liquid feed port 5 passes through the filter cloth 4, it is discharged to the outside from the liquid drain port 6.

Clamping bodies 3a and 3b that clamp the intermediate body 2 from both sides
is a lid-shaped holding part 3 that matches the frame-shaped intermediate body 2;
c, and a filter cloth 7 is stretched over the opening of the holding part 3c with an appropriate fixing device, and a drain port 8 for discharging the filtrate is bored in the lower part.
A dehydration chamber 9 closed by the filter cloth 7 of the clamping bodies 3a, 3b and the filter cloth 4 of the intermediate body 2 is formed.

Reference numeral 10 denotes a fixing base that supports the dewatering section 1, and the intermediate body 2 is suspended via a support rod 12 attached to the lower end of a support 11 fixed to the fixing base 10.
The upper end of the support rod 12 is rotatably connected to a horizontal rod 14 fixed to both ends of a pin 13 passing through a pair of supports 11, and the lower end of the support rod 12 is connected to the intermediate body 2.
The intermediate body 2 is pivotally connected to a pin 16 passing through protrusions 15 and 15' provided oppositely on the upper part of the support rod 12.
It can swing freely in the left-right direction about the upper end pivot point as a fulcrum, and can swing freely in the front-rear direction about the lower end pivot point of the support rod 12 as a fulcrum.

The clamping bodies 3a and 3b are a pair of support frames 1 rotatably supported on a support body 11 via pins 13.
7 and 17' via pins 18 and 18', and are pivotally supported to the support frames 17 and 17' so as to be freely swingable.
Reference numeral 19 denotes a cylinder fixed to the fixed base 10, and a pair of drive links 21, 21' pivotally supported at the tip of the piston rod 20 of the cylinder 19 are connected to the joint points of the driven links 22, 23 and 22', 23'. One end of the driven links 22, 23' is pivotally connected to the support 11 via pins 24, 24', and the other end is pivotally attached to the support frame 17, 17' via pins 25, 25'. The intermediate body 2 is held between the holding bodies 3a and 3b by the extension of the piston rod 20 of the cylinder 19, and the holding is released by the contraction of the piston rod 22.

As shown in FIGS. 1 to 3, piping 2 is installed at a slightly upper position of the divided body 2b located in the center of the intermediate body 2.
An injection pipe 27 is connected to a compressed air source (not shown) through a pipe 6, and injection holes 28 are provided at appropriate intervals in the lower part of the injection pipe 27 to separate and eject the compressed air. They are lined up. Furthermore, a row of perforations 29 for introducing compressed air are arranged on the upper surface of the central divided body 2b at positions facing the injection holes 28.

(g) Effect The present invention has an injection pipe 27 located at a slightly upper position of the split body intermediate body 2b located in the center of the intermediate body 2 of the dehydration section 1.
The injection holes 28 are arranged at appropriate intervals in the lower part of the injection pipe 27, and the compressed air is divided into the injection holes 28.
The divided body 2b is ejected from the
Since it is introduced into the interior, the entire area of the filter cloth 4 can be impacted almost uniformly with the minimum necessary amount of compressed air.
The cake can be completely peeled off.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal sectional front view of the dehydrating section, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a longitudinal sectional front view of the dehydrating section during cake discharge, and Fig. 4 is a partially vertical front view of the dehydrator. 1...Dehydration part, 2...Intermediate, 2a, 2b, 2
c...Divided body, 3a, 3b...Holding body, 3c...
Clamping part, 4, 7... Filter cloth, 5... Liquid feeding port, 6, 8
... Drain port, 9 ... Dehydration chamber, 10 ... Fixed table, 1
DESCRIPTION OF SYMBOLS 1... Support body, 19... Cylinder, 27... Injection pipe, 28... Injection hole, 29... Compressed air introduction hole.

Claims (1)

[Scope of utility model registration request] A liquid feeding port is drilled in the side surface of the divided body located on both sides of the three divided bodies whose joint surface is a flat plane in a frame shape surrounded by a frame body, and a liquid drainage port is bored in the bottom surface of the divided body located in the center. The intermediate body, which is integrated with a filter cloth stretched between the joining surfaces of each divided body, is suspended via a support fixed to a fixed base, and the intermediate body is inserted into the cylinder from both sides. A clamping body having a lid-shaped clamping part with a flat opening for clamping is provided, and the stock solution is pressurized into a dehydration chamber formed by a filter cloth stretched over the clamping body and an intermediate filter cloth. In a dehydrator for dewatering, an injection pipe connected to a compressed air source is provided at a position slightly above the centrally located split body, and injection holes are arranged in rows at appropriate intervals at the bottom of the injection pipe, facing the injection holes. A dehydrator characterized in that a perforation for introducing compressed air is provided on the upper surface of a divided body.