JP2545172B2 - Cake removal device in filter press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention applies a vibrating force vertically and longitudinally to a pair of filter cloths arranged between adjacent filter plates to peel and remove the cake adhering to the filter cloths. The present invention relates to a cake removing device in a filter press.

[0002]

2. Description of the Related Art Heretofore, various types of cake removing devices in this type of filter press have been known. For example, as shown in Japanese Patent Laid-Open No. 3-72904,
An engaging plate body is pivotally attached to a vertically movable support body, and two engaging recesses are formed at the lower end of the engaging plate body. A pair of filter plates are arranged in the front-rear direction when the filter plate is opened. After inserting the filter cloth suspension rods into the engaging recesses, the engaging plate body is struck by a vibrating cylinder to apply vibration to the filter cloth so that the cake adhering to the filter cloth is peeled off.

[0003]

However, in the structure described above, since the support body is pivotally attached to the support body by the single support shaft, the pair of support plates are arranged in the front-rear direction. In the filter cloth suspension rod, for example, when the engagement plate swings forward, both the pair of filter cloth suspension rods move to the front side. The state at this time is schematically shown in FIG. In the figure, R ₁ is the locus of the bottom surface of the engaging recess, O ₁ is the center of rotation thereof (center of pivoting with respect to the support body), and R ₂ is a filter cloth suspension for suspending and supporting the filter cloth whose lower end is fixed to the filter plate. The locus of the bar, O _2, is the fixed point of the filter cloth on the filter plate. Than this, the filter plate hanging bar by engaging recess bottom to be restricted to an arc of a radius R _1, in between the intersections G and H of the arc of the circular arc and the radius R ₂ of the radius R ₁ of the radius R ₂ arc Since it is located above the arc having the radius R ₁ , the filter plate suspension rod is pressed downward by the bottom surface of the engaging recess, and the filter cloth is loosened. On the contrary,
On the right side of the figure from the point G, the circular arc of radius R ₁ is located above the circular arc of radius R ₂ so that the filter cloth suspension rod is not pressed by the bottom surface of the engaging recess and the filter cloth is stretched. It remains. Therefore, when the engaging plate body is lowered at the point G to insert the filter cloth hanging rod into the engaging concave portion, or conversely, the engaging plate body is raised to take out the filter cloth hanging rod from the engaging concave portion, this G On the right side of the figure from the point, for example, in the front direction of the filter press, this filter cloth is vibrated while being stretched.
On the left side of the point, the filter cloth suspension rod is pressed down by the bottom surface of the engaging recess and the filter cloth is loosened. As a result, there is a problem that the cake cannot be smoothly separated from the filter cloth due to the looseness of the filter cloth.

Therefore, as a result of earnest research, the inventor of the present invention divided the engaging plate body into two pieces, and pivotally attached the engaging plate body corresponding to each of the pair of front and rear filter cloth suspension rods to the support body. . By doing so, as shown in FIG. 5, the radius R ₃ of the locus of the bottom surface of the engaging recess of the engaging plate can be made smaller, and the engaging recess and the filter cloth suspension can be made at point G as in the conventional case. Even if the rod is moved in and out, the arc of radius R ₃ is located above the arc of radius R ₂ in both the front and back directions of point G, and the filter cloth sways in either direction. Even if you move it, it will remain in the expanded state. Therefore, an object of the present invention is to solve the above problems, and to provide a cake removing device in a filter press that can apply vibration while the filter cloth is stretched to smoothly separate the cake from the filter cloth. Especially.

[0005]

In order to achieve the above-mentioned object, according to the present invention, two swinging members are swingably attached to one supporting body in correspondence with a pair of filter cloth suspension rods. In this way, the distance between the pivot shaft and the bottom surface of the engaging recess is made smaller than before, and the bottom surface of the engaging recess prevents the filter cloth suspension rod from being pressed downward, and the filter cloth swings in either the forward or backward direction. It is configured so that it can maintain its expanded state even when it is moved.

That is, a dolly movable along a moving member provided in the front-rear direction of the filter press, a support main body supported by the dolly so as to be vertically movable, and a side end near each support main body on the support main body. A pair of rocking members, each of which is pivotally supported by a pivot shaft and has an engaging concave portion that opens downward at each lower portion thereof and into which a filter cloth suspension rod can be inserted; and a piston rod supported by the support body. A swing cylinder having a tip end attached to the swing member and swinging the swing member around the pivot shaft by driving the piston rod forward and backward. In the above structure, the support body may be formed of a plate, and the support body may be provided with a guide roller for guiding the vertical movement when the support body is moved up and down.

[0007]

According to the structure of the present invention, the distance between the pivot shaft and the bottom surface of the engaging recess is smaller than that in the conventional case, and the bottom surface of the engaging recess does not press the filter cloth suspension rod downward. The cloth can be maintained in a stretched state regardless of whether the cloth is swung in the front-rear direction, and the cake can be smoothly separated from the filter cloth stretched by the vibration. Also,
Support bodies are provided on both left and right sides of the trolley so that they can be raised and lowered by a lifting cylinder.
The two rocking members are pivotally mounted independently of each other,
An engaging recess is provided at the lower end of each rocking member in a downward opening so as to engage with an end of the filter cloth suspension rod from above, and the rocking member is provided at a peripheral position of the rocking member. Since a rocking cylinder for giving a rocking force is provided, each of the above rocking members is independently rocked by driving the cylinder rod of each rocking cylinder, and further, the filter cloth hanging engaged with this rocking member. The rod is also swung, and as a result, the filter cloth attached to the filter cloth hanging rod is applied with an oscillating force in the up-down direction and the front-back direction, and the cake adhering to the filter cloth is peeled off.
Further, since the engaging concave portion provided in the swing member has a downward opening shape so as to be held and engaged with the end portion of the filter cloth suspension rod from above, the swinging motion of the swing member is prevented by the filter cloth. It is reliably transmitted to the suspension rod, and the transmission efficiency of the driving force is very good. Further, the method of transmitting power between the respective components is direct and simple, the operation is reliable, and the vibration force is applied by the rocking cylinder while the rocking member is constantly engaged with the filter cloth suspension rod. Therefore, in combination with the above-mentioned high transmission efficiency, an extremely efficient vibration operation of the filter cloth can be obtained. Furthermore, the cake removing device has a simple structure, and each component or device is relatively small and lightweight. Therefore, it is possible to reduce the size of the cake removing device and thus the filter press as a whole, and it is also possible to significantly reduce the cost.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
It will be described in detail based on. As shown in FIGS. 1 to 4, the cake removing device in the filter press according to the present embodiment is provided with a carriage 4 provided on a moving rail 3 provided above the filter plates 2, ... It is generally composed of a pair of vibrating devices 5 and 5 provided on both left and right sides.

The plurality of filter plates 2, ..., 2 are arranged so as to be movable in the front-rear A and B directions on the side plates 6, 6 between machine frames (not shown in FIG. 1) before and after the filter press.
These movements are sequentially performed one by one by a filter plate transfer device (not shown). Reference numeral 7 denotes a filter cloth stretched on the front and rear surfaces of each filter plate 2, the upper edge of which is attached to a filter cloth suspension rod 8. The filter cloth suspension rod 8 has left and right suspension arms 9,9. Is suspended and supported via filter cloth suspension springs 10 and 10. The lower end of the suspension arm 9 is pivotally attached to the upper portions of the left and right side surfaces of each filter plate 2, and the suspension arm 9 is provided so as to project upward from the upper portions, and the upper ends thereof are pivotally attached to each other.

Specifically, the moving rail 3 is made of a pair of left and right H-shaped steels, and above the filter plates 2, ..., 2 in the arrangement direction of the filter plates 2 ,. It is provided so as to extend.

The dolly 4 is provided with a pair of left and right moving wheels 13, 13 at the front and rear parts of its top.
, 13 are mounted on the moving rail 3 so as to be rollable. In addition, the rotary shaft 1 of the front moving wheels 13, 13
A sprocket wheel 14 is fixed to 3a, and this is connected to a drive motor 16 by a drive chain 15. Then, by the drive of the drive motor 16, the carriage 4 is moved in the front-rear A and B directions in response to the opening / closing operation of the filter plates 2 performed one by one for discharging the cake after the filtration process. It In addition, 35 is a guide roller.

The vibrating device 5 is for vibrating the filter cloth 7 in the vertical and longitudinal directions, and a pair of vibrating devices 5 are provided on both left and right sides of the carriage 4. Each vibrating device 5 includes a support body 17,
The swing member 23 and the swing cylinder 19 are provided as main parts.

Specifically, the support body 17 is made of a vertically long plate material, and the front and rear side edges 17a, 17a of the guide body 2 are rotatably arranged side by side on the side surface of the carriage 4.
Guided by 0, ..., 20, it is able to move up and down. Further, inside the support plate 17, an elevating cylinder 21 is fixed upward on the side surface of the carriage 4. The elevating cylinder 21 is specifically an air cylinder, and the tip of a cylinder rod 21a thereof is connected to the upper end of the support body 17 via a connecting bracket 22 so as to extend in the vertical direction of the cylinder rod 21a. The support body 17 moves up and down in response to the forward / backward movement.

The swinging member 23 is composed of a plate body pivotally mounted on the lower end of the support body 17 so as to be swingable. The swing member 23 is pivotally attached to a lower end portion of the support body 17 by a pivot shaft 25 at a portion near the front-rear direction support body. Further, the tip end 19b of the piston rod 19a of the rocking cylinder 19 is pivotally mounted on the opposite side in the front-rear direction with respect to the portion of the rocking member 23 where the pivot shaft 25 is provided, and the piston of the rocking cylinder 19 is The engaging plate 23 is rotated around the pivot shaft 25 by moving the rod 19a in and out. An engaging recess 23a is provided at the lower end of the swing member 23 so as to open downward. The engagement recess 23a is engaged with the end of the filter cloth suspension rod 8 so as to be held from the upper side. Has been done. Further, as shown in FIG. 1, the arrangement positions of the engaging recesses 23a, 23a of the pair of engaging members 23, 23 in the front-rear direction are as follows.
In the open frame state of the filter plates 2 and 2, the filter plate suspension rods 8 and 8 which are adjacent to each other in the front-rear direction are set in correspondence with the front-rear direction interval dimension.
The rocking cylinder 19 applies a rocking force to the rocking member 23, and is provided above the rocking member 23 so as to face the supporting body 17 downward. The swing cylinder 19 is specifically an air cylinder, and is used as the swing member 2
Two are provided corresponding to 3 and 23, respectively. The rocking cylinders 19 and 19 may be arranged not only in one side as shown in FIG.

The cake removing device 1 configured as described above
When the filtration step by the filter press is completed, the clamping pressure fixing state of the filter plates 2, ..., 2 is released, and each time the filter plates 2 are opened by the filter plate transfer device, the following sequence is performed. Operated by. The drive motor 16 of the dolly 4 is activated, the dolly 2 moves on the moving rail 3, and the cake removing device 1 is located above the central portion between the open filter plates 2 and 2. At this time, the support main body 17 is in the raised position, and the engaging recesses 23a, 23a of the swinging members 23, 23 are located above the side end portions of the filter cloth suspension rods 8, 8 adjacent to each other in the front-rear direction. Next, the pair of lift cylinders 21 and 21 provided on both the left and right sides of the carriage 4 are activated, and the pair of left and right support bodies 1
7, 17 are lowered to the lowered position. At this time, the engaging recesses 23a of the rocking members 23 simultaneously engage with the ends of the filter cloth suspension bars 8 adjacent to each other in the front-rear direction so as to be held from above. In this state, the rocking cylinders 19, 19 are activated to rock the rocking members 23, 23 about the pivot shafts 25, 25.

Then, the engaging recess 23 of the swing member 23 is formed.
The filter cloth suspension rod 8 engaged with a is also swung, and the filter cloth 7 is vibrated in the vertical direction and the front-back direction. This, combined with the elastic force of the filter cloth suspension springs 10 and 10,
A complicated and effective vibration is applied to the filter cloth 7, and as a result, the cake adhering to the filter cloth 7 is swung off quickly and reliably.

In this case, the filter cloth suspension rod 8 has the swing member 23.
Since the engaging recess 23a is always engaged so as to be held from above, the driving force is reliably transmitted from the swinging member 23 to the filter cloth suspension rod 8. When the work of removing the cake from the filter cloths 7, 7 is completed, the rocking cylinders 19, 19 are stopped, and then the lifting cylinders 21, 21 are activated again, and the pair of left and right support bodies 17, 17 are left and right. Is returned to the raised position. At this time, the engagement state between the engagement recess 23a of each rocking member 23 and the filter cloth suspension rod 8 adjacent to the front and rear is also released at the same time.

When one cake removing operation is completed as described above, the above-described operations are sequentially repeated thereafter to remove the cake from all the filter cloths 7, 7 of the filter press.

In the above operation, the projecting and retracting operations of the rocking cylinders 19, 19 are alternately performed forward and backward. Further, the order of operation and the operating speed are set in the left and right vibrating devices 5, 5. If properly combined, various vibration modes optimal for the filter cloths 7, 7 of the filter press can be obtained. For example, in addition to completely synchronizing the operations of the left and right vibrating devices 5 and 5, the operations of the left and right vibrating devices 5 and 5 are reversed so that the front swing cylinder 19 of the left vibrating device 5 is
It is possible to synchronize the projecting / retracting operation between the rear swing cylinder 19 of the right and left vibration device 5, or to change the speed of the projecting / retracting operation of the swing cylinders 19 and 19 on the left and right. .

According to the above embodiment, as shown in FIG.
Pivot shaft 25 and smaller than the spacing or the radius R ₃ conventional and engaging recess bottom surface, it is not possible to press the filter cloth hanging rod 8 by the engagement recess bottom downwards, the filter cloth 7 is in either the longitudinal direction The stretched state can be maintained even when the cake is swung in the direction, and the cake can be smoothly separated from the filter cloth 7 stretched by the vibration. A support body 17 is provided on both left and right sides of the carriage 4 so as to be lifted and lowered by a lift cylinder 21, and a lower end portion of the support body 17 is
Two rocking members 23, 23 are pivotally mounted independently of each other so as to be rockable, and the engaging recess 23 is formed at the lower end of each rocking member 23.
The rocking cylinder 19a is provided in a downward opening so as to engage with the end of the filter cloth suspension rod 8 from above, and which rocks the rocking member 23 at a position around the rocking member 23.
Since the rocking members 23 are provided, the rocking members 23 are independently rocked by driving the cylinder rods 19a of the rocking cylinders 19, and the filter cloth suspension rods 8 engaged with the rocking members 23 are rocked. As a result, the filter cloth 7 attached to the filter cloth suspension rod 8 is applied with an oscillating force in the up-down direction and the front-rear direction, and the cake adhering to the filter cloth 7 is peeled off. Further, since the engaging recess 23a provided in the rocking member 23 is formed in a downward opening so as to be held and engaged with the end portion of the filter cloth suspension rod 8 from above, the rocking member 23 rocks. The movement is surely transmitted to the filter cloth suspension rod 8,
The transmission efficiency of driving force is very good. In addition, the power transmission method between the respective components is direct and simple, the operation is reliable, and the vibration by the rocking cylinder 19 is generated while the rocking member 23 is always engaged with the filter cloth suspension rod 8. Since the force is applied, an extremely efficient vibration operation of the filter cloth 7 can be obtained in combination with the high transmission efficiency. Furthermore, the cake removing device has a simple structure, and each component or device is relatively small and lightweight. For this reason, it is possible to reduce the size of the cake removing device and thus the filter press as a whole.
Moreover, the cost can be significantly reduced.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example,
Although the above-mentioned embodiment is applied to a single type filter press in which a plurality of filter plates 2, ..., 2 having the same structure are arranged, the present invention comprises a plurality of filter plates and filter frames arranged alternately. It can also be applied to multiple filter presses.

[Brief description of drawings]

FIG. 1 is a partial side view of a cake removing device of a filter press according to an embodiment of the present invention.

2 is a partially enlarged front view of the cake removing device of FIG. 1. FIG.

3 is a plan view of the cake removing device of FIG. 1. FIG.

FIG. 4 is an explanatory view showing a swinging state of a swinging plate body of the cake removing device of FIG. 1.

FIG. 5 is an explanatory diagram for explaining the relationship between a conventional example and the present invention.

[Explanation of symbols]

1 ... Cake removing device, 2 ... Filter plate, 3 ... Moving rail, 4 ...
Dolly, 5 ... Vibration device, 6 ... Side plate, 7 ... Filter cloth, 8 ... Filter cloth suspension rod, 9 ... Suspension arm, 10 ... Filter cloth suspension spring, 13 ... Moving wheel, 14 ... Sprocket wheel, 15 ... Drive chain , 16 ... Drive motor, 17 ... Support body, 19 ... Oscillating cylinder, 19a ... Piston rod, 20 ... Guide roller, 21 ... Lifting cylinder, 21a ... Cylinder rod, 2
3 ... Oscillating plate, 23a ... Engagement recess, 25 ... Pivot shaft, 35
… Guidance roller.

Claims (2)

(57) [Claims] 1. A dolly (4) movable along a moving member (3) provided in the front-rear direction of a filter press, and a support body (1) movably supported by the dolly (4).
7) and the support body (17) is pivotally attached at its end near each support body by a pivot shaft (25), and a filter cloth suspension rod (8) is inserted into each lower part of the support body (17) by opening downward. A pair of swing members (23) having possible engagement recesses (23a), and a piston rod tip supported by the support body (17) and attached to the swing member (23). ), The swing member (2
A cake removing device in a filter press, comprising: a swing cylinder (19) for swinging 3) around the pivot shaft (25). 2. The support body (17) is composed of a plate body, and a guide roller (20) for guiding a vertical movement when the support body (17) is moved up and down is provided on the support body (17). The cake removing device in the filter press according to claim 1, wherein the cake removing device is provided in the filter press.