JP4135850B2 - Filter press equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter press apparatus.
[0002]
[Prior art]
As is well known, a recent filter press apparatus has a filter plate group consisting of a plurality of filter plates that can be expanded and contracted in the thickness direction of the filter plate to form a large number of filter chambers for the purpose of improving the filtration efficiency. The filter plates are pressed and adhered to each other at the time of filtration to form a filter chamber between the filter plates, and when the dehydrated cake is discharged, the filter plates are separated from each other and the dehydrated cake is discharged from between the filter plates. Yes.
[0003]
As an apparatus for expanding and contracting the filter plate group, there is one proposed by the present applicant in Japanese Patent Publication No. 4-9566. This opening / closing device is connected to a filter plate group composed of a plurality of filter plates, which can be freely opened and closed in the thickness direction of the filter plate, and a filter plate on one side end of the filter plate group via a hydraulic cylinder. And a moving table that is movable back and forth in the direction of expansion and contraction of the filter plate group. By extending and contracting this cylinder, the one end filter plate on the one side while the cylinder takes a reaction force on the moving table. The filter plate on the other side is pressed and tightened on the side, and the filter plate open / close distance can be very long while the device configuration is simple, and the number of filter chambers can be increased accordingly. It is.
[0004]
[Problems to be solved by the invention]
However, in such a conventional apparatus, since the hydraulic cylinder is installed on the one side end filter plate and the moving base as a clamping device, a large-diameter hydraulic cylinder is required to increase the clamping force, and the weight of the device In addition, an increase in equipment cost has been a problem. Also, as the hydraulic cylinder increases in size, the weight of the part that moves together with the moving base increases, so a large driving source is required for the moving base. However, it was a problem that it became higher.
[0005]
On the other hand, the filter press device is sometimes used in wastewater dewatering facilities such as water purification plants. In such a case, if a hydraulic cylinder is used, the hydraulic oil is not only supplied from the cylinder itself but also from hydraulic piping, a hydraulic unit, etc. It was also a problem that there was a risk of leakage and mixing with drainage or dehydrated matter.
[0006]
Furthermore, in the filter press device, the tightening pressure may change depending on the old and new filter cloth and the dehydrated cake attached to the filter cloth. However, conventionally, the filter plate tightening pressure cannot be detected and adjusted. The tightening pressure could not be optimized. In particular, when the number of filter plates is large, such a change in tightening pressure appears remarkably, and stable dehydration ability cannot be exhibited over time.
[0007]
Therefore, a main problem of the present invention is to enable reduction in size and weight and cost of the tightening drive source. Another problem is to prevent hydraulic oil from being mixed into the drainage or dehydrated product.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention that has solved the above problems is a filter plate group comprising a plurality of filter plates that can be freely opened and closed in the thickness direction of the filter plate, and one end of the filter plate group. It is connected to the filter plate via a pantograph jack and is a movable table that is movable back and forth in the direction of expansion and contraction of the filter plate group, and a filter press device comprising:
The pantograph jack is configured so that it can be expanded and contracted in the filter plate group expansion / contraction direction, and the refraction angle of the refraction arm pair on one side with respect to the expansion / contraction direction is larger than the refraction angle of the refraction arm pair on the other side. Has been
By expanding the width of the pantograph-type jack in the filter plate group expansion / contraction direction, the pantograph-type jack presses the one side end filter plate toward the other side while applying a reaction force to the moving table. A filter press device characterized by being configured to be tightened and tightened. Since such a pantograph jack can exhibit a large output (a large expansion / contraction force) even with a small input, a large tightening pressure can be exhibited even with a small drive source. Therefore, it is possible to reduce the size and weight of the tightening drive source without reducing the tightening force, and to reduce the cost and the cost of the drive source of the carriage 11 accordingly. Become.
[0009]
The invention according to claim 2 is provided with a rack along the moving direction of the moving table, while providing a rotating drive source on the moving table, and providing a gear driven to rotate by the rotating drive source. The filter press apparatus according to claim 1, wherein the rack is engaged with the rack.
[0010]
According to a third aspect of the present invention, there is provided means for fixing the movable table so as not to move in a retreating direction separated from at least the one side end filter plate at a predetermined movement position. This is a filter press device.
[0011]
The invention described in claim 4 comprises pressure detecting means for detecting the tightening pressure by the pantograph jack, and pressure adjusting means for adjusting the tightening pressure by the pantograph jack based on the detected pressure. It is a filter press apparatus of any one of 1-3. By providing such means, it becomes possible to finely adjust to an appropriate tightening pressure.
[0012]
Invention of Claim 5 is a filter press apparatus of any one of Claims 1-4 which does not have the drive source act | operated by oil_pressure | hydraulic. That is, in all of the tightening drive source, the filter plate opening / closing drive source, and the pressure adjustment drive source, the drainage can be achieved by using no drive source that operates by hydraulic pressure such as a hydraulic jack or a hydraulic motor. It becomes possible to prevent the hydraulic oil from being mixed into the dehydrated product.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Device configuration)
1 to 3 show a filter plate clamping device according to the present invention, FIG. 1 is a plan view, FIG. 2 is a side view of the filter plate opened, and FIG. 3 is a filter plate tightened. FIG.
In the apparatus of this example, a pair of main beams 1 and 1 that are spaced apart from each other and parallel to each other are in the longitudinal direction (hereinafter simply referred to as the longitudinal direction means the longitudinal direction of the main beams 1 and 1). Are supported by the support members 2 and 2 and extend in the horizontal direction, and a filter plate group comprising a plurality of filter plates 3, 3... The moving frame 4 supported and arranged on the opening direction side of the filter plate groups 3, 3... Is supported. Guide rollers 6, 6 are attached to the individual filter plates 3, 3... And the moving frame 4, and the guide rollers 6, 6 are configured to run on the main beams 1, 1. Further, the adjacent filter plates 3, 3... And the entire moving frame 4 are connected to each other by tie bolts 5, 5.
[0014]
In the present invention, a pantograph jack 20 as a clamping device on the open frame side (that is, the side opposite to the filter plate side of the moving frame 4) with respect to the integral filter plates 3, 3,. Are connected to a carriage 11 having guide rollers 12, 12...
[0015]
In the present embodiment, a cart drive rotary drive source such as an electric motor (not shown) is attached to the lower side of the cart 11, and the rotation shaft extends to the lower side of the main beam 1 on one side. A pinion gear (gear) is attached to the existing portion, and a rack is fixed along the longitudinal direction on the lower surface of the main beam on one side, and the pinion gear and the rack are engaged with each other. Therefore, by operating the carriage moving rotational drive source 13M and appropriately rotating the pinion gear forward and backward, the carriage can move back and forth as the pinion gear runs while meshing along the lower surface of the rack. In particular, since the racks 14 and 14 are provided on the lower side surfaces of the main beams 1 and 1 and the cart guide rollers 12 and 12 and the pinions 13 and 13 support the main beams 1 and 1 between them, the cart 11 The back-and-forth movement is stable.
[0016]
Further, in the apparatus of this example, as the retraction preventing means 70, latching convex portions 71 and 71 are provided on the side surface portions of the main beams 1 and 1, and the carriage 11 can be moved up and down by a reciprocating drive device such as a jack (not shown). The retraction prevention members 72, 72 are attached. By adopting such a configuration, even when the carriage 11 is moved to a predetermined position, the carriage 11 is moved in the backward direction by lowering the backward prevention members 72 and 72 to the front side of the latching projections 71 and 71. The receding prevention members 72 and 72 are caught by the catching convex portions 71 and 71 and are prevented from moving backward. In addition to this, for example, the reverse prevention means proposed in the above-mentioned Japanese Patent Publication No. 4-9566 can be used.
[0017]
Further, in the present embodiment, the carriage 11 is connected to the moving frame 4 integrated with the filter plate groups 3, 3,... Via the pantograph jack 20, and as shown in FIG. The expansion / contraction drive source 20M is attached to the.
More specifically, the pantograph jack 20 includes moving frame side link brackets 21 and 21 attached to the side surface of the moving frame 4 in the opening direction, the moving frame side link brackets 21 and 21, and the moving frame side link pins 26. The movable frame side main link arms 22 and 22 and the movable frame side auxiliary link arm 31 are connected to each other via the movable frame side main link arms 22 and 22 and the central main link pin 27, respectively. The trolley side main link arms 23, 23 that are rotatably connected, the trolley side auxiliary link arm 32 that is rotatably connected via the moving frame side auxiliary link arm 31 and the central part auxiliary link pin 34, and these Main and auxiliary link arms 23, 23, 32 and link pins 28 on the cart side Together are each pivotally connected via a link mechanism with the carriage side link bracket 24, 24 is connected is configured as a pressure sensing means 50 at its opposite sides. Further, with respect to the central auxiliary link pin 34, an internal nut member (not shown) and a tightening rotation drive source 20M such as an electric motor for rotating the nut member around its rotation axis through the reduction gear 43 are provided. The driving device 42 is fixed, and the other end portion of the screw rod 41 having one end connected to the central main link pin 27 is screwed to the internal nut member of the driving device 42.
[0018]
Further, according to the present invention, the angle of refraction of the main link arm pair 22, 23 as the refracting arm on one side with respect to the expansion / contraction direction along the filter plate expansion / contraction direction is set to the auxiliary link arm pair 31, 32 as the other refraction arm. It is configured to be larger than the refraction angle. With such a configuration, because of the principle of the lever, a large output (a large expansion / contraction force) can be exhibited even with a small input, so that there is an advantage that a large tightening pressure can be exhibited even with a small driving source. The tightening drive source can be reduced in size and weight and cost can be reduced without reducing the tightening force, and the drive source of the carriage 11 can be reduced in size and weight and cost can be reduced accordingly.
[0019]
Thus, when the tightening rotation drive source 20M is operated and the internal nut member is rotated in the forward direction or the reverse direction, the screw rod 41 is moved upward or downward with respect to the internal nut, thereby the central main link pin. The distance between 27 and the central auxiliary link pin 34 is changed, and the jack 20 can be expanded and contracted in the filter plate group expansion / contraction direction.
[0020]
On the other hand, in this embodiment, the pantograph jack 20 and the carriage 11 are connected via the pressure detection means 50. The pressure detecting means 50 detects the tightening pressure of the filter plate groups 3, 3,... By the above-described pantograph jack 20, and for example, a load cell can be used.
[0021]
Further, a pressure adjusting means 60 for finely adjusting the filter plate clamping pressure by adjusting the distance between the pressure detecting means 50 and the carriage is attached to the carriage side mounting portion of the pressure detecting means 50. . The pressure adjusting means 60 is screwed into a pair of nut members 62 and 62 attached to the end of the carriage 11 on the pressure detecting means 50 side in a posture along the tightening direction. A pair of screw rods 61, 61 projecting on both sides and having a tip portion rotatably connected to the pressure detecting means 50, and a screw rod side chain wheel 65 attached to the base end portion of these screw rods 61, 61. , 65, a drive source side chain wheel 66 disposed therebetween, an endless chain 64 wound around these chain wheels, and a rotational drive for adjustment such as a motor with a speed reducer that rotationally drives the drive source side chain wheel 66 And a source 63.
[0022]
Thus, by operating the rotational drive source 63 and rotating the screw rods 61, 61 via the endless chain 64 or the like, the screw rods 61, 61 are moved back and forth in the tightening direction with respect to the nut members 62, 62. Can do. Since the pressure detection means 50, the pantograph jack 20, the moving frame 4, and the filter plate groups 3, 3,... Are connected in this order to the tips of the screw rods 61, 61, the screw rods 61, 61 are moved back and forth in the tightening direction. This makes it possible to finely adjust the filter plate clamping pressure.
[0023]
(Tightening method)
Next, a suitable filter plate tightening method using the above-described filter press apparatus will be described.
FIG. 2 shows a state before the filter plate is tightened. To tighten the filter plate, the filter plate groups 3, 3... Are first closed from this state. That is, the carriage moving rotational drive source 13M is operated to move the carriage to the filter plate groups 3, 3,..., And this moving force causes the pressure adjustment means 60, the pressure detection means 50, and the pantograph jack 20 to pass through. The moving frame 4 and the filter plates 3, 3.
[0024]
When the carriage 11 reaches the predetermined position in this manner, the movement of the carriage 11 is stopped, and as shown in FIGS. 1 and 3, the carriage 11 is moved backward (filter plates 3, 3,. Do not move in the opposite direction).
If the carriage 11 is fixed so as not to move backward, next, the fastening rotation drive source 20M is operated to gradually expand the pantograph jack 20 in the fastening direction, and while taking a reaction force on the fixed carriage 11, The moving frame 4 and the filter plates 3, 3... Are tightened and tightened until the main link arms 22 and 23 on each side are in a straight line for a predetermined extension distance. Stop 20M .
[0025]
Subsequently, the pressure detecting means 50 detects the tightening pressure of the filter plates 3, 3. Here, if the pressure obtained by the pressure detection means 50 matches the preset clamping pressure of the filter plate, the filter plate clamping process is terminated, and the process proceeds to the filtration process.
[0026]
On the other hand, if it does not agree with the preset tightening pressure of the filter plate, the following operation is performed.
That is, first, the pantograph jack 20 is contracted to open the filter plates 3, 3. Next, based on the previously detected tightening pressure, the adjustment rotary drive source 63 is operated to rotate the screw rods 61 and 61 to adjust the distance between the pressure detecting means 50 and the carriage 11. If the previously obtained pressure from the moving frame 4 side is larger than the preset clamping pressure of the filter plate, the screw is set so that the distance between the pressure detecting means 50 and the carriage 11 is shortened. When the rods 61 and 61 are rotated and, conversely, the pressure obtained from the moving frame 4 side is smaller than the preset clamping pressure of the filter plate, the pressure detecting means 50 and the carriage 11 are reversed. The screw rods 61 and 61 are rotated so that the distance between them becomes longer. It should be noted that the relationship between the contraction distance and the set pressure detection pressure difference is preferably determined in advance through experiments or the like.
[0027]
Thereafter, the pantograph jack 20 is expanded again and tightened, and the pressure is detected by the pressure detecting means 50. By repeating the above operation until the detected pressure matches the preset filter plate tightening pressure, tightening at an optimum pressure can be performed.
[0028]
On the other hand, at the time of opening the frame, the procedure is the reverse of the closing frame process described above, and after the pantograph jack 20 is contracted, the retraction preventing members 72 and 72 are then lifted to unlock the carriage 11. Then, the carriage 11 is moved in the frame opening direction (the side opposite to the filter plates 3, 3,...), And the moving frame 4 and the filter plates 3, 3,.
[0029]
【The invention's effect】
As described above, according to the filter press according to the present invention, it is possible to reduce the size and weight of the tightening drive source and to reduce the cost, and to finely adjust the filter plate tightening pressure. Various advantages such as prevention of contamination are brought about.
[Brief description of the drawings]
FIG. 1 is a plan view of a filter press apparatus according to the present invention.
It is a side view showing a filtration plate open frame state of the filter press apparatus according to the present invention; FIG.
Is a side view showing a filtration plate閉枠state of filter press apparatus according to the present invention; FIG.
FIG. 4 is a plan view of an essential part of a pantafflar jack.
FIG. 5 is a front view of a main part of a contracted state of a pantaflaf jack.
FIG. 6 is a front view of the main part of the expanded panta-flaf jack.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main beam, 2 ... Column member, 3 ... Filter plate, 4 ... Moving frame, 5 ... Tie bolt, 6 ... Guide roller, 10 ... Moving means, 11 ... Dolly, 12 ... Dolly guide roller, 13 ... Pinion, 14 ... Rack, 20 ... Pantograph jack, 21 ... Moving frame side link bracket, 22 ... Moving frame side main link arm, 23 ... Dolly side main link arm, 24 ... Dolly side link bracket, 26, 27, 28, 34 ... Link pin 30 ... Auxiliary member, 31 ... Moving frame side auxiliary link arm, 32 ... Dolly side auxiliary link arm, 41 ... Screw rod, 42 ... Fixing member, 43 ... Reducer, 20M ... Tightening rotation drive source, 50 ... Pressure detection means, 51 ... load cell, 52 ... load cell adapter, 60 ... pressure adjusting means, 61 ... screw rod, 62 ... nut member, 63 ... rotational driving adjustment , 64 ... endless chain, 65, 66 ... chain wheel, 70 ... retraction preventing means, 71 ... Kaketometotsu unit, 72 ... retraction preventing member.

Claims (5)

A filter plate group consisting of a plurality of filter plates that can be opened and closed in the thickness direction of the filter plate, and is connected to a filter plate at one end of the filter plate group via a pantograph jack and the filter plate A filter press device comprising a moving table that is movable back and forth in the expansion and contraction direction of the plate group,
The pantograph jack is configured so that it can be expanded and contracted in the filter plate group expansion / contraction direction, and the refraction angle of the refraction arm pair on one side with respect to the expansion / contraction direction is larger than the refraction angle of the refraction arm pair on the other side. Has been
By expanding the width of the pantograph-type jack in the filter plate group expansion / contraction direction, the pantograph-type jack presses the one side end filter plate toward the other side while applying a reaction force to the moving table. A filter press device characterized by being configured to be tightened. A rack is provided along a moving direction of the moving table, a rotation driving source is provided on the moving table, a gear that is rotated by the rotation driving source is provided, and the gear and the rack are engaged with each other. Item 2. A filter press apparatus according to Item 1. The filter press apparatus according to claim 1 or 2, further comprising means for fixing the moving table so as not to move at least at a predetermined moving position in a backward direction away from the one-side end filter plate. The pressure detecting means for detecting the tightening pressure by the pantograph jack and the pressure adjusting means for adjusting the tightening pressure by the pantograph jack based on the detected pressure. The filter press apparatus as described. The filter press apparatus according to any one of claims 1 to 4, wherein the filter press apparatus does not have a drive source that operates by hydraulic pressure.

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