JP3813922B2 - Filter press, clamping device and driving method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, for example, filters sludge such as sludge. Do filter press And, more particularly, to reduce the size of a tightening device for tightening a filter plate unit by a filter press. Filter press The present invention also relates to a tightening device and a driving method thereof.
[0002]
[Prior art]
As is well known, a filter press has a filter cloth set between a filter plate and a compressed filter plate equipped with a diaphragm for injecting pressurized water, and a plurality of filters for filtering sludge such as sludge pressed into the filter chamber. A configuration including a clamping device that includes plate units arranged in parallel so as to overlap in a horizontal direction, and a pressing member that presses and fixes the plurality of filter plate units to the fixing member so as to be reciprocally movable. It is common.
[0003]
The tightening force of the tightening device is a first tightening force corresponding to the product of the area of the seal surface where the filter plate and the compressed filter plate press and hold the filter cloth and the surface pressure of the seal surface, Since a tightening force larger than the sum (reaction force, back pressure) of the second tightening force corresponding to the product of the compression pressure acting on the filter chamber and the area of the filter chamber is necessary, Although a hydraulic cylinder is employed as the attachment device, it is a large hydraulic cylinder and has a problem in miniaturization.
[0004]
Furthermore, when a hydraulic cylinder is used as a tightening device, oil leakage must be taken into account and a pump unit is required, and there are problems such as installation space problems and noise generated from the pump unit. .
[0005]
In view of this, a configuration has been proposed in which a screw mechanism is employed instead of a hydraulic cylinder as the tightening device, and the screw mechanism is rotationally driven by a motor (see, for example, Patent Document 1 and Patent Document 2).
[0006]
[Patent Document 1]
JP 2001-276510 A
[Patent Document 2]
JP 2001-104714 A
[0007]
[Problems to be solved by the invention]
The configuration described in Patent Document 1 includes a moving frame and a carriage that support a plurality of filter plates on a pair of horizontal main beams supported at both ends by a column member, and press the filter plates against a fixed member. Are supported by the main beam so as to be movable. Further, a pantograph jack (toggle link mechanism) is interposed as a clamping device between the moving frame and the carriage, and the carriage and the pantograph jack are used to finely adjust the clamping pressure by the pantograph jack. The screw rod is configured to be movable back and forth in the tightening direction.
[0008]
In the configuration as described above, after fixing the carriage so as not to move backward, the pantograph jack is operated, the moving frame is moved in the direction of the filter plate, and the filter plate is pressed against the fixing member and tightened. At this time, the tightening pressure is detected by the pressure detecting means, and if the detected tightening pressure matches the preset tightening pressure, the tightening process is finished, and if not, the screw rod is rotated. Then, it moves back and forth to adjust the position.
[0009]
Therefore, there is a problem that the adjustment work after fixing the carriage is troublesome, and the pressure (back pressure) acting on the filter plate at the time of filtration is received by the threaded rod part. However, there is a problem that fixing phenomenon such as seizure phenomenon is likely to occur.
[0010]
In Patent Document 2, a rail that supports a number of filter plates is configured such that a stopper and a movable head that presses the filter plate are movably supported, and a stopper is provided between the stopper and the movable head. On the other hand, a screw for moving the movable head is provided.
[0011]
In the above configuration, in order to fix the stopper and the movable head to the rail, the stopper and the movable head are each provided with an engaging device.
[0012]
Therefore, the back pressure (reaction force) acting on the filter plate during the filtration operation is received by the engagement device provided in the movable head, and the influence on the screw screw can be prevented, but the stopper and the movable head are respectively There is a problem that the configuration is complicated because the engagement device has a configuration capable of resisting a large tightening force.
[0014]
[ Means for solving the problem ]
The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 A filter cloth is set between the filter plate and the compressed filter plate, and a plurality of filter plate units for filtering the slurry press-fitted into the filter chamber are provided in parallel. In a filter press provided with a pressing member that can be pressed and tightened so as to be reciprocally movable, a pressing means for pressing and moving the pressing member in the tightening direction is used to propel the pressing member in the tightening direction. A pressure member is provided, the pressure member is provided so as to be movable in the opposite direction with respect to the tightening direction, and is pressed and urged in the tightening direction, and the pressure member is moved in the opposite direction. It is the structure provided with the movement control member for restricting.
[0015]
Claim 2 The invention according to Claim 1 In the filter press according to claim 1, the pressurizing unit includes a screw mechanism including a screw member and a nut member screwed to be relatively movable to the screw member, and one of the screw member side and the nut member side. A pressing member is provided on the side, and the other side is a pressing member.
[0016]
Claim 3 The invention according to the present invention is provided with a plurality of filter plate units in parallel, wherein a filter cloth is set between the filter plate and the compressed filter plate, and the slurry press-fitted into the filter chamber is filtered. In a filter press comprising a pressing member that can be pressed against and tightened against a fixed member so as to be reciprocally movable, it can be integrally rotated with a sleeve rotated by a rotary actuator and can be moved in the axial direction with respect to the sleeve The screw member supported by the sleeve, the nut member or screw member being screwed to the supported screw member or nut member so as to be relatively movable and the pressing member being provided on the nut member or screw member. Alternatively, the screw member or the nut member provided so as to be movable in the direction opposite to the tightening direction and pressed and urged in the tightening direction and supported by the sleeve. A configuration in which a movement restricting member for restricting the movement in the said opposite direction of the nut member.
[0017]
Claim 4 The invention according to Claim 3 The filter press according to claim 1, further comprising detection means for detecting movement of the screw member or nut member supported by the sleeve in the opposite direction.
[0018]
Claim 5 The invention according to Claim 3 or 4 In the filter press described in (1), the power transmission mechanism from the rotary actuator to the sleeve is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve.
[0019]
Claim 6 According to the invention, the nut member or the screw member is relatively moved to the screw member or the nut member supported so as to be rotatable integrally with the sleeve rotated by the rotary actuator and movable in the axial direction with respect to the sleeve. The nut member or the screw member is provided with a pressing member, and the screw member or the nut member supported by the sleeve is provided so as to be movable in a direction opposite to the pushing direction of the pressing member. A configuration is provided that includes a movement restricting member that is provided by being pressed and urged in the pushing direction and that is capable of restricting movement of the screw member or the nut member supported by the sleeve in the opposite direction.
[0020]
Claim 7 The invention according to Claim 6 The tightening device according to claim 1, further comprising detection means for detecting movement of the screw member or nut member supported by the sleeve in the opposite direction.
[0021]
Claim 8 The invention according to Claim 6 or 7 In the tightening device described in (1), the power transmission mechanism from the rotary actuator to the sleeve is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve.
[0022]
Claim 9 According to the invention, the nut member or the screw member is relatively moved to the screw member or the nut member supported so as to be rotatable integrally with the sleeve rotated by the rotary actuator and movable in the axial direction with respect to the sleeve. A screw mechanism that can be screwed together is provided, a pressing member is provided on the nut member or the screw member, and the screw member or the nut member supported by the sleeve can be moved in a direction opposite to the direction in which the pressing member is pushed forward. And a movement restricting member that is provided to be pressed and urged in the pushing direction and is capable of restricting movement of the screw member or the nut member supported in the sleeve in the opposite direction, from the rotary actuator to the sleeve A tightening mechanism for filter presses, which is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve in a power transmission mechanism up to In the driving method of the apparatus, when a plurality of filter plate units provided in a filter press are pressed against a fixing member by the pressing member and tightened, the rotary actuators are pressed until the filter cloth provided in each filter plate unit is pressed. The sleeve is rotated at a high speed, and when the filter cloth in each filter plate unit starts to be pressed, the rotation of the sleeve by the rotary actuator is switched to a low speed, and the clamping force of each filter plate unit by the pressing plate When the torque reaches a predetermined clamping force, the rotation of the rotary actuator is stopped to hold the clamping force at the predetermined clamping force, and the slurry is pressed into each filter chamber of each filter plate unit. After squeezing and filtering the slurry, the sleeve is rotated at a low speed in the reverse direction by the rotary actuator to release the fixing phenomenon of the screw mechanism. Serial is a driving method of a filter with press clamping apparatus for high speed rotating the sleeve in the reverse direction by the rotary actuator.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
Referring to FIG. 1 schematically and conceptually, a filter press 1 according to an embodiment of the present invention includes a frame 5 integrated with a base 3, and a pair of front and rear provided horizontally on the frame 5. Between the guide rails 7, a plurality of filter plate units 9 are provided in parallel so as to overlap in the horizontal direction, and each filter plate unit 9 is supported by the guide rails 7 so as to be movable.
[0025]
The filter plate unit 9 has a configuration in which a filter cloth is set between the filter plate and a compressed filter plate having a diaphragm for injecting pressurized water, and performs filtration by pressing slurry such as sludge into the filter chamber. Thus, the solid content in the slurry is accumulated in the filter chamber as a dehydrated cake. Then, pressurized water is injected into a diaphragm provided in the squeezing filter plate, and the dehydrated cake is further pressurized and squeezed and dehydrated to minimize moisture. Thereafter, the dewatering cake is peeled off from the filter cloth by opening the filter plate and the squeezing filter plate so as to separate.
[0026]
In addition, since this kind of filter plate unit 9 is well-known, the detailed description about the structure of the filter plate unit 9 is abbreviate | omitted.
[0027]
In order to press and fix each filter plate unit 9 against the fixing member 5A provided on the frame 5, a pressing member 11 that can press the filter plate unit 9 is movable on the guide rail 7. It is supported. A clamping device 13 that reciprocates the pressing member 11 along the guide rail 7 and presses and clamps each filter plate unit 9 against the fixing member 5 </ b> A by the pressing member 11 supports the frame 5. It is attached to the part 5B.
[0028]
As shown in detail in FIG. 2, the fastening device 13 includes a cylindrical housing 15 that is horizontally attached to a support portion 5 </ b> B of the frame 5 by a fixture such as a bolt, and the housing 15 includes a casing. 17 is integrally attached by a fixture such as a bolt. A motor 19 as an example of a rotary actuator is appropriately attached to the casing 17, and an output shaft 19A of the motor 19 is a lid member attached so as to close the casing 17 and the opening of the casing 17. Both ends of the cap 21 are coupled to a clutch shaft 23 that is rotatably supported by a coupling 25.
[0029]
First and second drive gears 27 and 29 are rotatably supported at both ends of the clutch shaft 23, and the rotation of the clutch shaft 23 is directed to the first and second drive gears 27 and 29 side. A switchable clutch mechanism is provided.
[0030]
That is, between the first and second drive gears 27 and 29, there is a disc-shaped clutch member 31 that can transmit the rotation of the clutch shaft 23 to the first and second drive gears 27 and 29. It is supported movably in the direction. The clutch member 31 rotates integrally with the clutch shaft 23 via, for example, a slide key.
[0031]
In order to move the clutch member 31 in the axial direction, an axial direction formed on the clutch shaft 23 is formed on an inner end portion of a shift pin 33 slidably fitted in a hole provided in an axial center of the clutch shaft 23. A connecting pin 35 that is fixed to the clutch member 31 through the long hole is fixed.
[0032]
A shifter cap 37 is attached to the outer end portion of the shift pin 33 via a bearing so as to be relatively rotatable. The shifter cap 37 is attached to a bracket 39 provided on the cap 21 via a pin. A tip end portion of a bell crank 41 that is pivotally supported is pivotally connected. At the base end portion of the bell crank 41, a reciprocating actuator 45 such as a solenoid or a fluid pressure cylinder as an example of a clutch switching means swingably supported by a bracket 44 provided on the casing 17 is provided. The front end of an operating rod 45A that is reciprocally movable is pivotally connected.
[0033]
Therefore, by reciprocating the operating rod 45A in the actuator 45, the shift pin 33 is reciprocated in the axial direction via the bell crank 41, and the clutch member 31 is moved to the first drive gear 27 side or the second drive. It can be selectively moved to the gear 29 side.
[0034]
In order to transmit the rotation of the clutch shaft 23 to the first and second drive gears 27 and 29 by integrating the first and second drive gears 27 and 29 and the clutch member 31, Engaging recesses 27A and 29A are formed on the surfaces of the second drive gears 27 and 29 facing the clutch member 31, and the engaging recesses 27A and 29A are formed on both surfaces of the clutch member 31 on the disk. And an engaging projection 31A that is freely disengageable.
[0035]
The engagement recesses 27A, 29A and the engagement projections 31A are relative to each other, and the engagement projections are provided on the first and second drive gears 27, 29 side to provide the clutch member 31. An engaging recess may be provided on the side. Further, the dog clutch may have a configuration in which the first and second drive gears 27 and 29 and the clutch member 31 are each provided with an engaging recess and an engaging protrusion.
[0036]
Both ends of a sleeve 47 are rotatably supported on the casing 17 and the cap 21, and first and second driven gears 49 and 51 having different diameters are integrally attached to the sleeve 47. In order to transmit the rotation of the first and second drive gears 27 and 29 to the sleeve 47, an intermediate shaft 53 is rotatably supported by the casing 17 and the cap 21. A large-diameter intermediate gear 55A meshed with the second drive gear 29 is integrally attached, and a small-diameter intermediate gear 55B meshed with the large-diameter second driven gear 51 is integrally provided. is there.
[0037]
Further, an intermediate gear 57 meshed with the first drive gear 27 is rotatably supported on the intermediate shaft 53, and the intermediate gear 57 is meshed with the first driven gear 49 having a small diameter.
[0038]
Accordingly, in a state where the clutch member 31 and the first drive gear 27 are connected, the sleeve 47 is rotated at a high speed via the intermediate gear 57 and the first driven gear 49, and the clutch member 31 and the second drive gear 49 are rotated. In a state where the gear 29 is connected, the sleeve 47 is rotated at a low speed via the intermediate gears 55A and 55B and the second driven gear 51.
[0039]
That is, the configuration including the clutch member 31, the first and second drive gears 27 and 29, the intermediate gears 55A, 55B and 57, the first and second driven gears 49 and 51, etc. The power transmission mechanism reaching the sleeve 47 is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve 47.
[0040]
A slide shaft portion 63 integral with a screw member 61 of a screw mechanism 59 as an example of a pressurizing means built in the housing 15 is fitted to the sleeve 47 so as to be movable in the axial direction. The slide shaft portion 63 is configured to be fitted in the sleeve 47 with, for example, a spline or to be moved in the axial direction through a slide key, but is configured to rotate integrally with the sleeve 47. A nut member 65 is screwed to the screw member 61 so as to be reciprocally movable, and a distal end portion of a cylindrical pressing operation rod 67 integrally connected and fixed to the nut member 65 at the proximal end side is A connecting plate 69 integrally connected to the pressing member 11 is integrally attached.
[0041]
Therefore, as described above, when the sleeve 47 is rotated by the drive of the motor 19, the screw member 61 is integrally rotated, so that the nut member 65 screwed into the screw member 61 is axially (left and right in FIG. 2). ) Will be moved. Then, when the pressing member 11 is moved in the direction of the filter plate unit 9 via the connecting plate 69 and the filter plate unit 9 is pressed and pressed by the pressing member 11, the screw member 61 in FIG. It will move relatively to the right.
[0042]
As already understood, since the pressing member 11 is propelled in the tightening direction (pressing direction) by the rotation of the screw member 61, the screw member 61 is a pressurizing member for propelling and pressing the pressing member 11. It constitutes a member.
[0043]
In addition, in order to detect that the screw member 61 as the pressurizing member has moved relatively to the right in FIG. 2, a movement detection sensor 71 such as a limit switch is provided as an example of a detection unit. As an example of a pressing and urging means that urges and urges the screw member 61 in the tightening direction (left direction in FIG. 2), for example, a plate between the flange portion 61F provided in the screw member 61 and the sleeve 47 An elastic member 73 such as a spring or urethane rubber is interposed.
[0044]
The movement detection sensor 71 is attached to a cover 75 attached to the cap 21 so that its position can be adjusted. That is, the movement detection sensor 71 is activated when the screw member 61 moves a desired amount against the urging force of the elastic member 73. For example, the end of the slide shaft portion 63 of the screw member 61 is detected. The distance between and is adjustable.
[0045]
In other words, the screw member 61 is moved to the right in FIG. 2 against the urging force of the elastic member 73 and the elastic member 73 is compressed, so that the elastic member 73 compresses the desired urging force. Is equivalent to the detection operation of the movement detection sensor 71 when the movement detection sensor 71 is applied to the screw member 61. Therefore, the movement detection sensor 71 is pressed relatively to the left by the screw member 61. This is equivalent to detecting the thrust of the rod 67 or the like, and forms a kind of thrust detection means.
[0046]
When the reaction force due to the pressing member 11 pressing the filter plate unit 9 reaches a desired magnitude or a predetermined magnitude, the screw member 61 is moved relatively rightward in FIG. In order to restrict the movement, the housing 15 is provided with a movement restricting portion 77 that can come into contact with the flange portion 61F. The movement restricting portion 77 is not limited to the housing 15 and can be provided on the sleeve 47.
[0047]
In the configuration as described above, the pressing member 11 is in a state of moving in the direction away from the filter plate unit 9 (right direction in FIG. 1), and from between the filter plate and the compressed filter plate in each filter plate unit 9. When the dehydrated cake is in an initial state where it is dropped, the sleeve 47 is rotated at a high speed when the clutch member 31 and the first drive gear 27 in the clutch mechanism are connected and the motor 19 is driven to rotate.
[0048]
Therefore, since the screw member 61 is also integrally rotated at a high speed, the pressing member 11 moves at a high speed in the direction of pressing the filter plate unit 9 as shown by VA in FIG. become. At this time, the load (load) acting on the pressing member 11 is very small, as indicated by FA in FIG. 3, and the filter plate units 9 are pressed against each other by the pressing member 11 so that each filter is in contact with each other. When reaching a position where the filter cloth and the squeezing filter plate in the plate unit 9 starts to press the filter cloth, the connection between the first drive gear 27 and the clutch member 31 is cut off, and the movement of the pressing member 11 is temporarily stopped. (The state of VB in FIG. 3).
[0049]
Whether or not the pressing member 11 has reached a position at which each filter plate unit 9 starts to repress the filter cloth is determined by previously adjusting detection sensors such as limit switches and proximity switches on the guide rail 7. The position where the saddle pressure of each filter cloth in each filter plate unit 9 is started by detecting that this detection sensor is actuated by the pressing member 11 or detecting the load fluctuation of the motor 19. It can be detected that the pressing member 11 has reached.
[0050]
Thereafter, when the clutch member 31 of the clutch mechanism is moved rightward in FIG. 2 and the second drive gear 29 and the clutch member 31 are connected, the rotation of the screw member 61 is switched to the low speed rotation. The pressing member 11 presses each filter plate unit 9 at a low speed as indicated by VC in FIG.
[0051]
As described above, when the pressing member 11 presses each filter plate unit 9 in a state where the filter plate units 9 are in contact with each other, the filter cloth is pressed and tightened by the filter plate and the squeezed filter plate in each filter plate unit 9. Thus, as indicated by FB in FIG. 3, the load (load) gradually increases. As described above, when the load is gradually increased, the pressing member 11 gradually and firmly tightens each filter plate unit 9 at a fixed position. Therefore, the screw member 61 in the screw mechanism 59 as an example of the pressurizing unit is attached. While gradually compressing the elastic member 73 as the biasing means, it moves relatively to the right in FIG.
[0052]
When the tightening force by the pressing member 11 reaches a predetermined value, the flange portion 61F provided on the screw member 61 comes into contact with the movement restricting portion 77 provided on the housing 15, and the relative position in FIG. Movement in the right direction, that is, movement in the direction opposite to the direction in which the pressing member 11 presses each filter plate unit 9 is restricted. This state can be easily detected because the slide shaft portion 63 of the screw member 61 moves relative to the sleeve 47 and the movement detection switch 71 is operated.
[0053]
As a configuration for detecting that the flange portion 61F of the screw member 61 is in contact with the movement restricting portion 77, the current value of the motor 19 is detected, and the detected current value is set in advance. It can also be configured to detect that the threshold value has been reached.
[0054]
As described above, when it is detected that the flange portion 61F comes into contact with the movement restricting portion 77, the driving of the motor 19 is stopped (the state of VD in FIG. 3), and each filter plate unit is stopped. The tightening force 9 is maintained at a predetermined tightening force FC. This tightening force FC is larger than the tightening force (F1: not shown) for tightening the filter cloth in each filter plate unit 9, and this tightening force F1 and the filter chambers in each filter plate unit 9 are in the filter chamber. The tightening force is smaller than the sum (F1 + F2) of the reaction force (F2: not shown) due to the applied pressing pressure.
[0055]
As described above, when the filter cloth of each filter plate unit 9 is tightened with the tightening force FC, when slurry is press-fitted into the filter chamber in each filter plate unit 9 to start dewatering, When the pressure gradually increases (in the state of FD in FIG. 3), when the dewatered cake in the filter chamber is squeezed and dehydrated by injecting pressurized water into the diaphragm provided in the squeezing filter plate, the pressure in the filter chamber is maximum (state of FE in FIG. 3). )
[0056]
The back pressure (reaction force) due to the pressure acting in the filter chamber is received by the movement restricting portion 77 via the flange portion 61F of the screw member 61, and the screw member 61 moves to the right in FIG. It is located at a fixed position without moving. Therefore, even when the pressure in the filter chamber in each filter plate unit 9 is increased during dehydration, each filter plate unit 9 is in a state of being fastened and fixed by the pressing member 11, and the filter of each filter plate unit 9. The plate and the squeeze filter plate do not open.
[0057]
As will be understood, the motor 19 only needs to have an ability to press the filter cloth in each of the filter plate units 9 and pressurize the filter cloth until the predetermined tightening force FC is reached. Since it does not require the ability to resist the back pressure due to the large pressure acting on the filter chambers in each filter plate unit 9 at times, the motor 19 can be reduced in size.
[0058]
A large pressure acts in the filter chamber of each filter plate unit 9 at the time of the pressure dehydration, so that the large back pressure causes a biting phenomenon (adhesion phenomenon) between the screw member 61 and the nut member 65 in the screw mechanism 59. It can occur and not easily move. Therefore, in order to release the tightening of each filter plate unit 9 after the squeezing and dehydrating process is completed, the motor 19 is reversely rotated in a state where the second drive gear 29 and the clutch member 31 in the clutch mechanism are connected, and the screw member 61 is reversely rotated at a low speed (VE in FIG. 3).
[0059]
Thus, by reverse rotation at a low speed, the biting phenomenon can be canceled by a low speed and a high torque. Thereafter, the rotation is temporarily stopped (VF), the connection in the clutch mechanism is switched to the connection between the first drive gear 27 and the clutch member 31, and then the motor 19 is rotated in the reverse direction so that the screw member 61 is reversed at a high speed. Since it is rotated, the pressing member 11 returns to the initial position in the right direction in FIG. 1 at a high speed (VG).
[0060]
When the pressing member 11 returns to the original origin position, the dewatering cake is dropped from each filter plate unit 9 and the reverse rotation of the motor 19 is stopped, and the pressing member 11 stops at the original position, It is in a standby state for the next dehydration start.
[0061]
The present invention is not limited to the above-described embodiment, and can be implemented in other forms by making appropriate changes. For example, in the screw mechanism 59, the configuration in which the screw member 61 is supported by the sleeve 47 and is movable in the axial direction has been described, but the positional relationship between the screw member 61 and the nut member 65 is relative. The nut member can be movably supported on the sleeve, and the biasing means is interposed between the nut member and the sleeve, and the screw member is connected to the pressing member.
[0062]
Furthermore, the pressurizing means is not limited to the screw mechanism in which the screw member and the nut member are screwed together, and a cam mechanism, a toggle link mechanism, or the like can also be employed.
[0063]
【The invention's effect】
As understood from the above description, in the present invention, the tightening force when the pressing member is pressed and biased by the biasing means is larger than the tightening for tightening the filter cloth in the filter plate unit, The tightening force applied to the pressing member is smaller than the sum of the tightening force and the back pressure due to the compression pressure acting on the filter chamber, and the movement of the pressing member is restricted by the movement restricting portion. Since the size of the actuator for applying the tightening force can be reduced, the overall configuration can be reduced.
[0064]
In addition, a special fixing device for fixing the pressing member or the like is not required, the overall configuration can be simplified, and the conventional problems as described above can be solved. .
[Brief description of the drawings]
FIG. 1 is a schematic and conceptual illustration of a filter press according to an embodiment of the present invention.
FIG. 2 is a cross-sectional explanatory view of a tightening device according to an embodiment of the present invention.
FIG. 3 is an action explanatory diagram showing the relationship between the action of the tightening device and the load acting on the filter plate unit.
[Explanation of symbols]
1 ... Filter press
5 ... Frame
5A ... Fixing member
5B ... support part
9 ... Filter plate unit
11 ... Pressing member
13 ... Tightening device
15 ... Housing
17 ... Casing
19: Rotary actuator (motor)
23 ... Clutch shaft
27. First drive gear
29 ... Second drive gear
31 ... Clutch member
45 ... Actuator
47 ... Sleeve
49 ... 1st driven gear
51. Second driven gear
53 ... Intermediate shaft
59. Screw mechanism
61 ... Screw member
61F ... Flange
63 ... Slide shaft
65 ... Nut member
71 ... Movement detection sensor
73. Elastic member
77 ... Movement restriction part

Claims (9)

  A filter cloth is set between the filter plate and the compressed filter plate, and a plurality of filter plate units for filtering the slurry press-fitted into the filter chamber are provided in parallel. In a filter press provided with a pressing member that can be pressed and tightened so as to be reciprocally movable, a pressing means for pressing and moving the pressing member in the tightening direction is used to propel the pressing member in the tightening direction. A pressure member is provided, the pressure member is provided so as to be movable in the opposite direction with respect to the tightening direction, and is pressed and urged in the tightening direction, and the pressure member is moved in the opposite direction. A filter press comprising a movement restricting member for restricting the movement. 2. The filter press according to claim 1 , wherein the pressurizing unit includes a screw mechanism that includes a screw member and a nut member that is movably engaged with the screw member, and the screw member side or the nut member. A filter press comprising a pressing member on one side and a pressing member on the other side.   A filter cloth is set between the filter plate and the compressed filter plate, and a plurality of filter plate units for filtering the slurry press-fitted into the filter chamber are provided in parallel. In a filter press comprising a pressing member that can be pressed and tightened so as to be capable of reciprocating, a screw member that is supported by a sleeve rotated by a rotary actuator so as to be integrally rotatable and movable in the axial direction with respect to the sleeve. Alternatively, the nut member or the screw member is screwed into the nut member so as to be relatively movable, the pressing member is provided on the nut member or the screw member, and the screw member or the nut member supported by the sleeve is disposed on the nut member. The screw member or the nut member provided so as to be movable in a direction opposite to the tightening direction and pressed and urged in the tightening direction, and supported by the sleeve. Filter press, characterized in that it includes a movement restricting member for restricting the movement of the serial opposite direction. 4. The filter press according to claim 3 , further comprising detection means for detecting movement of the screw member or nut member supported by the sleeve in the opposite direction. 5. The filter press according to claim 3 , wherein the power transmission mechanism from the rotary actuator to the sleeve is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve.   A nut member or a screw member is screwed into a screw member or a nut member supported so as to be rotatable integrally with a sleeve rotated by a rotary actuator and movable in the axial direction with respect to the sleeve. The nut member or the screw member is provided with a pressing member, and the screw member or the nut member supported by the sleeve is provided so as to be movable in a direction opposite to the pushing direction of the pressing member and in the pushing direction. A tightening device for a filter press, comprising a movement restricting member which is provided by pressing and is capable of restricting movement of the screw member or nut member supported by the sleeve in the opposite direction. 7. The tightening device according to claim 6 , further comprising detection means for detecting movement of the screw member or nut member supported by the sleeve in the opposite direction. Attached equipment. 8. The tightening device according to claim 6 , wherein a power transmission mechanism from the motor to the sleeve is provided with a speed switching mechanism capable of switching the rotational speed of the sleeve. Attached equipment.   The nut member or the screw member is screwed to the screw member or the nut member supported so as to be rotatable integrally with the sleeve rotated by the rotary actuator and movable in the axial direction with respect to the sleeve. A screw mechanism is provided, a pressing member is provided on the nut member or the screw member, the screw member or the nut member supported by the sleeve is provided so as to be movable in a direction opposite to the pushing direction of the pressing member, and the pushing A power transmission mechanism that includes a movement restricting member that is configured to be pressed and urged in a direction and that is capable of restricting the movement of the screw member or the nut member supported in the sleeve in the opposite direction, from the rotary actuator to the sleeve. And a driving method of a tightening device for a filter press provided with a speed switching mechanism capable of switching the rotation speed of the sleeve. When the plurality of filter plate units provided in the filter press are pressed against the fixing member by the pressing member and tightened, the rotary actuators are used to press the filter cloths in the filter plate units until the filter cloth is pressed. The sleeve is rotated at a high speed, and when the filter cloth in each filter plate unit starts to be crushed, the rotation of the sleeve by the rotary actuator is switched to a low speed, and the tightening force of each filter plate unit by the pressing plate is set to a predetermined value. When the tightening force is reached, the rotation of the rotary actuator is stopped to hold the tightening force at a predetermined tightening force, and slurry is pressed into each filter chamber of each filter plate unit and compressed. After the filtration of the slurry is finished, the sleeve is rotated at a low speed in the reverse direction by the motor to release the fixing phenomenon of the screw mechanism, and then the rotary actuator is used. The driving method of the clamping device for filter press, characterized by high-speed rotation of the sleeve in the opposite direction Te.

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