JP7044520B2 - Filtration test equipment - Google Patents

Description

The present invention relates to a filtration test device.

FIG. 10 shows a principle diagram of an example of a rotary drum type filter. In the rotary drum type filter 100, the drum 102 is rotatably arranged above the slurry tank 101 around the axis O in the horizontal direction so that the lower portion thereof is immersed in the slurry in the slurry tank 101. The drum 102 is made of punching metal or the like, and a filter cloth 103 is attached to the outer periphery of the drum 102. The slurry is filtered by the filter cloth 103 by vacuuming from the inside of the drum 102, and the filtrate is taken out from the inside of the drum 102 to the outside by the internal pipe. In addition, instead of the evacuation method, there is also a pressurization method in which the slurry is filtered by pressurization from the outside of the drum 102.

The cake 104, which is the solid content of the slurry, adheres to the outer surface of the filter cloth 103 which is displaced upward from the slurry of the slurry tank 101 by the rotation of the drum 102. The cake 104 exposed in the air is dehydrated during rotation. Next, the cake 104 is peeled off by blowing air or the like blown from the inside of the drum 102 and the vibration of the filter cloth 103 accompanying the blow, and the cake 104 is taken out as a dehydrated cake from the cake chute 105. The filter cloth 103 from which the cake 104 has been removed is immersed in the slurry in the slurry tank 101 again by the rotation of the drum 102. As described above, when focusing on an arbitrary portion of the filter cloth 103, the filtration step → the dehydration step → the cake peeling step is performed during one rotation of the drum 102.

Generally, in manufacturing such a rotary drum type filter 100, the optimum filter cloth 103 suitable for the characteristics of the slurry is selected from a plurality of types of filter cloth 103, and the optimum filtration condition suitable for the optimum filter cloth 103 is obtained. A mock test called a leaf test is being conducted. FIG. 11 shows a conventional example of the jig used in this test. The jig 106 is composed of a first jig 108 and a second jig 109 that sandwich the filter cloth 103 of the test piece and the punching metal plate 107 according to the drum 102. The first jig 108 has a shape including a funnel portion 108A and a flange portion 108B formed at the expanded end of the funnel portion 108A. A notch 108C is formed on the outer peripheral edge of the flange portion 108B. The second jig 109 is made of a ring-shaped plate member, and a bolt 110 with a wing nut is attached to the second jig 109 so that it can be tilted up and down. The operator sandwiches the filter cloth 103 and the punching metal plate 107 between the flange portion 108B of the first jig 108 and the second jig 109, raises the bolt 110, passes it through the notch 108C, and tightens the wing nut. As a result, the outer edges of the filter cloth 103 and the punching metal plate 107 are sandwiched and fixed between the first jig 108 and the second jig 109.

FIG. 12 shows an example of a test method using the jig 106. In FIG. 12A, the operator connects the vacuum hose 111 to the small diameter portion of the funnel portion 108A and immerses the jig 106 in the slurry in the slurry container 112. Then, the vacuum pump is operated to evacuate and start filtration. The filtrate is collected in a filtrate recovery pipe 113 provided in the middle of the hose 111. This is a filtration step according to the filtration step of the rotary drum type filter 100.

After the lapse of a predetermined time, the filtration step is terminated, and the operator pulls up the jig 106 from the slurry container 112 as shown in FIG. 12 (b) to expose the cake attached to the filter cloth 103 to the atmosphere. This is a dehydration step according to the dehydration step of the rotary drum type filter 100. When the predetermined time has elapsed, the dehydration process is terminated, the vacuum pump is stopped, and the valve 114 is opened to collect the filtrate from the filtrate recovery pipe 113.

Next, the operator removes the hose 111 from the jig 106 and replaces it with the blow hose 115 as shown in FIG. 12 (c) to operate the air compressor. As a result, the cake adhering to the surface of the filter cloth 103 is peeled off by air blowing and collected in the container 116. This is a cake peeling step according to the cake peeling step of the rotary drum type filter 100.

The operator measures various data regarding the filtrate and cake obtained in the above steps, and repeats the above test under conditions such as changing the amount of slurry to be charged and changing the time of each step as necessary. By performing these tests on a plurality of types of filter cloth 103, the optimum filter cloth and filtration conditions are determined.

Since the present inventor could not find a patent document relating to the filtration test apparatus, the patent document relating to the rotary drum type filter was designated as Patent Document 1 as the prior art document.

JP-A-2015-120107

According to the conventional filtration test method, there are the following problems.
(1) Since the filtration step, the dehydration step, and the cake peeling step are performed manually, the operator frequently comes into direct contact with the slurry or cake.
(2) Since it is performed manually, variations due to habits of each operator are likely to appear in the test results.
(3) During a continuous test over a long period of time, a load is applied to the operator.
(4) It is difficult to test by one person, and two people are required as operators.

The present invention has been created to solve such a problem, and an object of the present invention is to provide a filtration test device capable of reducing the workload of an operator.

In order to solve the above-mentioned problems, in the present invention, the slurry is filtered by a removable filter medium, and the leaf head for accommodating the filtrate in the internal filtration chamber and the leaf head are provided with respect to the slurry. The leaf head drive mechanism that moves between the position where the filter medium is immersed and the position away from it, and the filtrate collection path formed between the filtration chamber and the filtrate discharge portion are switched between the communicating state and the non-communication state. The filter fluid recovery path switching mechanism and the blow supply path formed between the filtration chamber and the blow inflow section are switched between the communicating state and the non-communicating state, and the filter medium is at a position away from the slurry. In addition, the leaf head drive mechanism includes a rotary shaft that rotates around the axis and the rotary shaft that makes the blow supply path in the communicating state when the filtrate recovery path is in the non-communication state. A rotary flange that extends outward from the rotary shaft and rotates integrally with the rotary shaft, and a pipe material that connects the leaf head and the rotary flange and constitutes the filtrate recovery path and the blow supply path. The leaf head is a filtration test device characterized in that it is attached to the pipe material by a one-touch coupler .

According to the present invention, the workload of the operator can be reduced, and test results can be obtained without variation due to the operator's habits and the like.

It is a side sectional view of the filtration test apparatus which concerns on this invention. FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a view taken along the line III in FIG. It is an exploded explanatory view of a leaf head. FIG. 5 is a sectional view taken along line VV in FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. It is sectional drawing of VII-VII in FIG. It is an operation explanatory diagram of the filtration test apparatus. It is a side sectional view of the filtration test apparatus when applied to a pressurization method. It is a principle diagram of a rotary drum type filter. It is an exploded perspective view of the jig used for the conventional filtration test. It is explanatory drawing which shows the process of the conventional filtration test method.

As shown in FIG. 1, the filtration test apparatus 1 according to the present invention includes a leaf head 2, a leaf head drive mechanism 3, a filtrate recovery path switching mechanism 4, and a blow supply path switching mechanism 5. ing.

"Leaf head 2"
The leaf head 2 filters the slurry S with a removable filter medium, and stores the filtrate L in the internal filtration chamber 6. In FIG. 4, the leaf head 2 includes an outer case 7, an inner case 8, a cap 9, and a stopper 10. The outer case 7 has a rectangular shape, and a filter medium opening 12 for allowing the filter cloth 11 as a filter medium to face the outside is formed on one surface thereof. The surface facing the filter medium opening 12 is formed with an insertion opening 15 for inserting the filter cloth 11, the support plate 13, the packing 14, and the inner case 8 into the outer case 7. The support plate 13 is made of a plate material having open eyes that allows the filtrate L to pass through, such as punching metal.

The inner case 8 has a rectangular shape that follows the shape of the inner surface of the outer case 7, and the insertion tip surface has an opening 16 that communicates with the filter medium opening 12 via the filter cloth 11 and the support plate 13. Is formed. One-touch coupler males 17 and 18 for connecting the filtrate recovery pipe 34 and the blow supply pipe 35, which will be described later, so as to communicate with the filtration chamber 6 are attached to the surface facing the opening 16.

The cap 9 is a plate-shaped member that opens and closes the insertion opening 15 of the outer case 7, and is rotatably attached to the outer surface of the outer case 7 with a hinge 19. The cap 9 presses the outer surface of the inner case 8 when closed to prevent the inner case 8 from rattling. The cap 9 is formed with a relief opening 20 for passing the one-touch coupler males 17 and 18.

The stopper 10 of the present embodiment includes a cam lever 21. The cam lever 21 includes a lever 23 having a cam portion 22, a contact plate 24 pressed by the cam portion 22, a bolt 25, and a nut 26. A fastened plate 28 having a U-shaped groove 27 is attached to the outer surface of the outer case 7, and a U-shaped groove 29 is also formed on the short edge of the cap 9 corresponding to the U-shaped groove 27.

The leaf head 2 has the above configuration, and when setting the filter cloth 11, the operator inserts the filter cloth 11, the support plate 13, the packing 14, and the inner case 8 in this order from the insertion opening 15 of the outer case 7. Then, the cap 9 is closed, the bolt 25 is passed through the U-shaped grooves 27 and 29, and the lever 23 is tilted. As a result, as shown in FIG. 1, the short edge of the cap 9 and the fastened plate 28 are fastened by the contact plate 24 pressed by the cam portion 22 and the nut 26. The filter cloth 11 and the support plate 13 are stably sandwiched and fixed by the outer case 7 and the inner case 8, and the inside of the inner case 8 is defined as a closed filtration chamber 6 by the packing 14.

"Leaf head drive mechanism 3"
In FIG. 1, the leaf head drive mechanism 3 moves the leaf head 2 between the position where the filter cloth 11 is immersed and the position away from the slurry S. The leaf head drive mechanism 3 of the present embodiment includes a rotary shaft 30 that rotates around the axis O in the horizontal direction, a rotary flange 31 that extends outward from the rotary shaft 30 and rotates integrally with the rotary shaft 30, and a leaf. The head 2 and the rotary flange 31 are connected to each other, and the filtrate recovery pipe 34 and the blow supply pipe 35, which are the pipe materials constituting the filtrate recovery passage 32 and the blow supply passage 33, are provided.

The filtration test apparatus 1 includes a gantry 36 framed in a rectangular shape with the direction along the axis O as the longitudinal direction. A slurry container 37 having an open upper portion and storing a slurry S is placed and fixed on the gantry 36. As shown in FIG. 2, a cake collecting section 92 is defined in a part of the slurry container 37 via a partition plate 91. It is preferable that the cake collecting unit 92 is removable. Further, the slurry container 37 and the cake collecting unit 92 may be used as separate containers. In FIG. 1, the slurry container 37 is sandwiched in the axis O direction, the first rotary shaft support plate 38 is erected on one end side of the gantry 36, and the second rotary shaft support plate 39 is erected on the other end side. ing. A motor support plate 40 is erected on the other end side of the second rotary shaft support plate 39. All of these three support plates are erected vertically with their respective plate surfaces orthogonal to the O direction of the axis. A motor 52 with a speed reducer connected to the other end of the rotary shaft 30 is attached to the motor support plate 40 as a drive source for the rotary shaft 30.

A rotary shaft support hole is formed through the first rotary shaft support plate 38 and the second rotary shaft support plate 39, respectively, and the rotary shaft 30 is rotatably supported in the pair of rotary shaft support holes via the collar 42. ing. Reference numeral 43 is a color presser. Each collar 42 protrudes from the first rotary shaft support plate 38 and the second rotary shaft support plate 39 toward the slurry container 37, and the first fixed flange 44 and the second fixed flange 45 are respectively projected from the protruding portion of the collar 42. It is fitted outside. The first fixed flange 44 and the second fixed flange 45 will be described in detail later.

The rotary flange 31 is composed of a first rotary flange 46 and a second rotary flange 47 that sandwich the leaf head 2 in the O direction of the axis. The outer end surface of the first rotary flange 46 is in contact with the first fixed flange 44, and the outer end surface of the second rotary flange 47 is in contact with the second fixed flange 45. The first rotary flange 46 and the second rotary flange 47 are attached by a key 48 so as to rotate integrally with the rotary shaft 30.

The filtrate recovery pipe 34 is a pipe member extending along the axis O, and one end thereof is fixed to the filtrate rotation hole 55 of the first rotary flange 46, which will be described in detail later, by press fitting or welding. At the other end of the filtrate recovery pipe 34, a one-touch coupler female 50 is attached via an elbow 49 in the direction outside the diameter of the axis O. The blow supply pipe 35 is also a pipe member extending along the axis O, and one end thereof is fixed to the blow rotation hole 73 of the second rotary flange 47, which will be described in detail later, by press fitting, welding, or the like. A one-touch coupler female 51 is also attached to the other end of the blow supply pipe 35 in the out-of-diameter direction of the axis O via the elbow 49.

As described above, in the leaf head 2, the one-touch coupler males 17 and 18 are connected to the one-touch coupler females 50 and 51, respectively, so that the filter cloth 11 faces the outside diameter of the axis O, respectively, and the filtrate recovery pipe is arranged. It is supported by 34 and the blow supply pipe 35. That is, the filtrate recovery pipe 34 and the blow supply pipe 35 function as the filtrate recovery passage 32 and the blow supply passage 33, and the leaf head 2 is connected to the rotary shaft 30 via the first rotary flange 46 and the second rotary flange 47. It also has a support function that attaches so that it rotates integrally with. In the present embodiment, a plurality of leaf heads 2 are provided around the axis O, specifically, eight leaf heads 2 are provided at equal intervals (indicated by reference numerals 2A to 2H in FIG. 2). Therefore, the filtrate recovery pipe 34 and the blow supply pipe 35 are also provided at equal intervals around the axis O, and the filtrate rotation holes 55 and the blow rotation holes 73 are also drilled at equal intervals around the axis O. Has been done. When the rotary shaft 30 is rotated by the drive of the motor 52, the leaf heads 2A to 2H rotate in the P direction in FIG. 2, and when the filter cloth 11 is displaced downward, the filter cloth 11 is immersed in the slurry S in the slurry container 37 and is moved upward. When displaced to, it separates upward from the slurry S.

"Filtrate recovery path switching mechanism 4"
In FIG. 1, the filtrate recovery path switching mechanism 4 switches the filtrate recovery path 32 formed between the filtration chamber 6 and the filtrate discharge unit 53 between a communicating state and a non-communication state. Specifically, the filtrate recovery path switching mechanism 4 is a communication or non-communication switching operation between the filtrate fixing hole 54 formed in the first fixing flange 44 and the filtrate rotating hole 55 formed in the first rotating flange 46. I do.

As described above, the first rotary flange 46 is provided with eight filtrate rotation holes 55 at equal intervals around the axis O corresponding to the eight leaf heads 2 (FIG. 2). Here, the first rotary flange 46 is attached to the rotary base flange 56 to which the filtrate recovery pipe 34 is attached to the rotary shaft 30 by the key 48, and the rotary sliding contact flange 57 which is in contact with the first fixed flange 44. It is divided and configured. The rotary base flange 56 and the rotary sliding contact flange 57 have the same diameter. The rotary base flange 56 and the rotary sliding contact flange 57 are integrated by bolts 58 in a state where the rotation phases of the eight filtrate rotation holes 55 formed through the shaft O direction are matched.

The first fixed flange 44 is a non-rotating member. The first fixed flange 44 is also divided into a rectangular fixed base flange 59 that fits outside the collar 42 and a fixed sliding contact flange 60 that contacts the rotary sliding contact flange 57. The fixed sliding contact flange 60 has the same diameter as the first rotary flange 46. As shown in FIG. 5, an annular groove 61 extending 360 degrees around the axis O is formed on the split surface side of the fixed base flange 59, and penetrates from the groove inner surface at the lower end of the annular groove 61 to the lower surface of the fixed base flange 59. A through hole 62 is formed. As shown in FIG. 1, a joint 63 is attached to the lower end opening of the through hole 62 as a filtrate discharge portion 53. The filtrate is collected in the filtrate recovery unit via a pipe (not shown) connected to the joint 63. In the present embodiment, the filtrate is constantly evacuated from the filtrate discharging unit 53, and a negative pressure is constantly applied to the filtrate fixing hole 54.

On the other hand, the fixed sliding contact flange 60 is formed with an endless annular hole 64 (FIG. 1) having the same pitch diameter as the annular groove 61 around the axis O. In FIG. 6, the starting end 64A of the endped annular hole 64 starts to immerse the leaf head 2 in the slurry S, and when almost the entire filter cloth 11 is immersed, the filtrate rotates through the leaf head 2. It is located so that it begins to communicate with the hole 55. The end 64B of the endped annular hole 64 is a filtrate that passes through the leaf head 2 when the leaf head 2 is separated from the slurry S by half a turn or more and is turned sideways before being immersed in the slurry S again. It is located so as to finish communicating with the rotary hole 55. The formation range angle θ of the endped annular hole 64 is appropriately set in consideration of the communication time of the filtrate recovery path 32 and the like. As shown in FIG. 1, the fixed base flange 59 and the fixed sliding contact flange 60 are integrated by a bolt 65. As a result, the endless annular hole 64, the annular groove 61, and the through hole 62 form the filtrate fixing hole 54.

Here, it is preferable that the hardness of one of the rotary sliding contact flange 57 and the fixed sliding contact flange 60, which are in contact with each other, is lower than the hardness of the other. As a preferred example, one is made of a metal material and the other is made of a resin material. In the present embodiment, the rotary sliding contact flange 57 is made of a metal material, and the fixed sliding contact flange 60 is made of a resin material. Examples of the resin material are fluororesin, polypropylene, polyethylene and the like. As a result, good slidability and adhesion between the metal surface and the resin surface can be ensured. Further, as another example of making the hardness of one lower than the hardness of the other, both the rotary sliding contact flange 57 and the fixed sliding contact flange 60 are made of a metal material, and one flange has a lower hardness than the other flange. It may be composed of a metal material. Considering the wear of the sliding metal surface and the resin surface, the first rotary flange 46 is divided into the rotary base flange 56 and the rotary sliding contact flange 57 as in the present embodiment, or the first fixed flange is formed. By separately configuring the 44 into the fixed base flange 59 and the fixed sliding contact flange 60, replacement work and maintenance work related to wear can be easily performed.

Further, in order to improve the adhesion between the rotary sliding contact flange 57 and the fixed sliding contact flange 60, the first fixed flange 44 is pressed so that the contact surface portion of the fixed sliding contact flange 60 is brought into close contact with the contact surface portion of the rotary sliding contact flange 57. It is preferable to provide an urging means 66 for urging. A spring accommodating case 67 is attached to the outer end surface side of the first rotary shaft support plate 38 (the surface side opposite to the surface facing the first fixed flange 44). A plurality of spring accommodating cases 67 are attached around the axis O, corresponding to the four corners of the fixed base flange 59 having a rectangular shape in the present embodiment, as shown in FIG. Each spring accommodating case 67 accommodates a compression coil spring 68 and a pressing plate 69 that presses one end of the compression coil spring 68. The other end of the compression coil spring 68 is in contact with the side surface of the fixed base flange 59 via a through hole formed in the first rotary shaft support plate 38. A hexagon socket head cap screw 70 for pressing and adjusting the pressing plate 69 toward the compression coil spring 68 is screwed into the spring accommodating case 67.

As described above, the first fixed flange 44 is pushed toward the first rotary flange 46 by the restoring elastic force of the compression coil spring 68, and the contact surface portion of the fixed sliding contact flange 60 is brought into close contact with the contact surface portion of the rotary sliding contact flange 57. .. Further, the urging force of the compression coil spring 68 can be easily adjusted by the hexagon socket head cap screw 70.

"Blow supply path switching mechanism 5"
In FIG. 1, the blow supply path switching mechanism 5 switches the blow supply path 33 formed between the filtration chamber 6 and the blow inflow section 71 into a communicating state and a non-communication state, and the filter cloth 11 is separated from the slurry S. The blow supply path 33 is brought into the communicating state when the filtrate recovery path 32 is in the non-communicating state at the above position. Specifically, the blow supply path switching mechanism 5 performs a communication or non-communication switching operation between the blow fixing hole 72 formed in the second fixed flange 45 and the blow rotating hole 73 formed in the second rotating flange 47. conduct.

The second rotary flange 47 is provided with eight blow rotary holes 73 at equal intervals around the axis O, corresponding to the eight leaf heads 2 (FIG. 2). Similar to the first rotary flange 46, the second rotary flange 47 is also divided into a rotary base flange 74 and a rotary sliding contact flange 75. The rotary base flange 74 and the rotary sliding contact flange 75 are integrated by bolts 76 in a state where the rotation phases of the eight blow rotary holes 73 formed through the shaft O direction are matched.

Similar to the first fixed flange 44, the second fixed flange 45 is also divided into a rectangular fixed base flange 77 and a fixed sliding contact flange 78 that are externally fitted to the collar 42. Similar to the fixed base flange 59, the fixed base flange 77 is formed with an annular groove 79 and a through hole 80 penetrating from the inner surface of the groove at the lower end of the annular groove 79 to the lower surface of the fixed base flange 77. A joint 81 is attached to the lower end opening of the through hole 80 as a blow inflow portion 71. A pipe connected to a blow gas source such as an air compressor is connected to the joint 81. In this embodiment, blow gas is constantly supplied from the blow inflow portion 71 to the blow fixing hole 72.

A blow hole 82 communicating with the annular groove 79 is formed through the fixed sliding contact flange 78. As shown in FIG. 7, the blow hole 82 is formed as one single hole. The blow hole 82 is formed at a position overlapping the pitch circle of the blow rotation hole 73. In FIG. 1, when the filtrate rotation hole 55 corresponding to a certain leaf head 2 and the filtrate fixing hole 54 are in a non-communication state, the blow hole 82 communicates with the blow rotation hole 73 corresponding to the leaf head 2. It is formed in a position. The fixed base flange 77 and the fixed sliding contact flange 78 are integrated by a bolt 83. As a result, the blow hole 82, the annular groove 79, and the through hole 80 form the blow fixing hole 72.

Similar to the filtrate recovery path switching mechanism 4, the rotary sliding contact flange 75 is made of a metal material and the fixed sliding contact flange 78 is made of a resin material for the purpose of improving the adhesion of the contact surface portion. Further, similarly to the filtrate recovery path switching mechanism 4, also in the blow supply path switching mechanism 5, the second fixed flange 45 is pressed to bring the contact surface portion of the fixed sliding contact flange 78 into close contact with the contact surface portion of the rotary sliding contact flange 75. The urging means 66 for urging is provided.

"Action"
FIG. 8 is an explanatory diagram of the operation of the filtration test device 1 as seen from the direction of arrow III in FIG. When a leaf head 2 starts to immerse the entire filter cloth 11 in the slurry S due to the rotation of the rotating shaft 30 in the P direction as shown at the position R1, the filtrate rotating hole 55 and the filtrate fixing hole The starting end 64A of the endd annular hole 64 of 54 is switched from the non-communication state to the communication state. As a result, a negative pressure is applied to the filtration chamber 6 of the leaf head 2 through the filtrate recovery tube 34 in FIG. 1, the slurry S is filtered by the filter cloth 11, and the filtrate L is the filtrate recovery tube 34 → filtrate rotation. It is discharged from the filtrate discharge unit 53 through the route of the hole 55 → the filtrate fixing hole 54. In FIG. 8, the filtration step is generally performed while the filter cloth 11 is immersed in the slurry S from the position R1 to the position R2.

In FIG. 8, when the leaf head 2 is rotated more than half a turn after being separated from the slurry S upward and is turned sideways as shown by the position R3, the filtrate rotation hole 55 reaches the end 64B of the end ring hole 64. The filtrate rotation hole 55 and the filtrate fixing hole 54 are switched from the communicating state to the non-communication state. As a result, the generation of negative pressure in the filtration chamber 6 is stopped. When the rotary shaft 30 further rotates and the leaf head 2 reaches the position R4, the blow rotary hole 73 and the blow hole 82 of the blow fixing hole 72 are switched from the non-communication state to the communication state. The process of dehydrating the cake C is generally up to immediately before switching to this communication state. Blow gas is supplied to the filtration chamber 6 through the blow supply pipe 35 in FIG. 1 by communicating the blow rotation hole 73 and the blow hole 82. Since the filtrate rotating hole 55 and the filtrate fixing hole 54 are not in communication with each other, the blow gas does not escape from the filtrate discharging portion 53. As a result, as a cake peeling step, the cake C is effectively peeled from the filter cloth 11 and collected by the cake collecting unit 92. The leaf head 2 from which the cake C has been peeled off is immersed in the slurry S again. The above process is repeated.

In the above steps, the rotary shaft 30 is rotated at a constant rotational speed, but for example, the motor 52 may be controlled by a controller (not shown) to change the rotational speed in each step. Further, while the blow rotation hole 73 and the blow hole 82 are in communication with each other, the rotation is stopped for a while to set a long blow time, and the time of each process is reduced by changing or stopping the rotation speed of the rotary shaft 30. It may be set arbitrarily.

As described above, the slurry S is filtered by the removable filter cloth 11, and the leaf head 2 for accommodating the filtrate L in the internal filtration chamber 6 and the leaf head 2 are immersed in the filter cloth 11 in the slurry S. The filtrate collection path 32 formed between the leaf head drive mechanism 3 for circulating and moving between the position where the filtration is performed and the position where the filtrate is discharged is switched between the communication state and the non-communication state. The blow supply path 33 formed between the filtrate recovery path switching mechanism 4 and the filtration chamber 6 and the blow inflow section 71 is switched between the communicated state and the non-communicated state, and the filter cloth 11 is at a position away from the slurry S. Further, according to the filtration test device 1 provided with the blow supply path switching mechanism 5 for making the blow supply path 33 in the communicating state when the filtrate recovery path 32 is in the non-communication state, the following effects are achieved. Will be done.

(1) Since each test step (filtration step, dehydration step, cake peeling step) is not manually performed as in the conventional case, contact with the operator's slurry S and cake C is reduced.
(2) Since it is not performed manually, there is no variation due to habits of each operator, and uniform test results can be obtained regardless of the operator.
(3) The load on the operator is reduced in continuous tests over a long period of time.
(4) You can handle it by yourself as an operator.

The leaf head drive mechanism 2 includes a rotary shaft 30 that rotates around the axis O, a rotary flange 31 that extends outward from the rotary shaft 30 and rotates integrally with the rotary shaft 30, and a leaf head 2 and a rotary flange 31. , And the pipe material constituting the filtrate recovery path 32 and the blow supply path 33 is provided, the following effects are obtained.

(1) The leaf head 2 can be circulated and moved with a simple structure using the rotating shaft 30.
(2) Since the pipe material can have a filtrate recovery function by the filtrate recovery path 32, a blow supply function by the blow supply path 33, and a support function of the leaf head 2, the number of parts is reduced and the assembling property is reduced. Excellent for.

A fixed flange (first fixed flange 44, second fixed flange 45) that contacts the outer end surface of the rotary flange 31 is provided, and the rotary flange 31 is configured with a filtrate recovery path 32 and a blow supply path 33 to form an axial center. A rotary hole (filter liquid rotary hole 55, blow rotary hole 73) that is displaced around O is formed, and the filtrate recovery path switching mechanism 4 has a filtrate fixing hole 54 and a rotary hole (filter liquid rotary hole) formed in the fixed flange. The switching operation of communication or non-communication with 55) is performed, and the blow supply path switching mechanism 5 performs a switching operation of communication or non-communication between the blow fixing hole 72 formed in the fixed flange and the rotary hole (blow rotary hole 73). The following effects are achieved if the configuration is such that

(1) The filtrate recovery path switching mechanism 4 can be manufactured with a simple structure using the filtrate rotation hole 55 of the rotary flange 31 and the filtrate fixing hole 54 of the fixing flange.
(2) The blow supply path switching mechanism 5 can be manufactured with a simple structure using the blow rotary hole 73 of the rotary flange 31 and the blow fixing hole 72 of the fixed flange.

If the hardness of one contact surface portion of the rotating flange 31 and the fixed flange that are in contact with each other is lower than the hardness of the other contact surface portion, good slidability and adhesion of both contact surface portions can be ensured.

If the urging means 66 is provided to press the fixed flange to bring the contact surface portion of the fixed flange into close contact with the contact surface portion of the rotary flange 31, the contact surface portions can be brought into close contact with each other with a simple structure.

If a plurality of leaf heads 2 are provided around the axis O, a plurality of filter cloths 11 of the same type can be tested at the same time, or different types of filter cloths 11 can be tested at the same time, and the test time can be shortened.

If the leaf head 2 is attached to the pipe material by a one-touch coupler (one-touch coupler male 17, 18, one-touch coupler female 50, 51), the setting work and the removal work of the leaf head 2 can be performed quickly.

The rotary flange 31 is composed of a first rotary flange 46 and a second rotary flange 47 that sandwich the leaf head 2 in the O direction of the axis, and the fixed flange is the first fixed surface that contacts the outer end surface of the first rotary flange 46. It is composed of a flange 44 and a second fixed flange 45 that is in contact with the outer end surface of the second rotating flange 47. Then, the pipe material is blow-supplied by connecting the filtrate recovery pipe 34, which connects the leaf head 2 and the first rotary flange 46 to form the filtrate recovery path 32, and the leaf head 2 and the second rotary flange 47. It is composed of a blow supply pipe 35 constituting the road 33. Then, the filtrate recovery path switching mechanism 4 performs a communication or non-communication switching operation between the filtrate fixing hole 54 formed in the first fixing flange 44 and the filtrate rotating hole 55 formed in the first rotating flange 46. The blow supply path switching mechanism 5 is configured to perform a communication or non-communication switching operation between the blow fixing hole 72 formed in the second fixed flange 45 and the blow rotating hole 73 formed in the second rotating flange 47. , The following effects are achieved.

By dividing the rotary flange 31 into the first rotary flange 46 and the second rotary flange 47 and the fixed flange into the first fixed flange 44 and the second fixed flange 45, the filtrate recovery path switching mechanism 4 and the blow supply path are switched. The mechanism 5 and the mechanism 5 can be arranged apart from each other. Further, the leaf head 2 can be supported by both the filtrate recovery pipe 34 and the blow supply pipe 35, and the support strength of the leaf head 2 is increased.

The preferred embodiment of the present invention has been described above. In the embodiment described, a vacuum method is adopted in which a negative pressure is generated in the filtration chamber 6 of the leaf head 2 by drawing a vacuum from the filtrate discharge unit 53, and the slurry S is filtered by the differential pressure inside and outside the filtration chamber 6. However, the present invention is not limited to this, and can be easily applied to the pressurization method.

<Modification example>
FIG. 9 shows a pressurization type filtration test device 1, and the filtration test device 1 of FIG. 1 is hermetically covered with a pressurization case 93 except around the motor 52. Around the insertion portion of the rotating shaft 30, the sealing member 94 is used to seal the shaft. Since the pressure atmosphere in the pressure case 93 creates a differential pressure between the inside and outside of the filtration chamber 6 of the leaf head 2, the slurry S is filtered without drawing a vacuum from the filtrate discharge section 53, and the filtrate is discharged. It can be discharged from 53.

Further, in the described embodiment, the rotary flange 31 is composed of the first rotary flange 46 and the second rotary flange 47, the fixed flange is composed of the first fixed flange 44 and the second fixed flange 45, and the pipe material is formed. There are two pipes, a filtrate recovery pipe 34 and a blow supply pipe 35. Then, the filtrate recovery path switching mechanism 4 is provided on the first fixed flange 44 and the first rotary flange 46 side, and the blow supply path switching mechanism 5 is provided on the second fixed flange 45 and the second rotary flange 47 side. However, the present invention is not limited to this, for example, both the filtration fixing hole 54 and the blow fixing hole 72 are formed on one side of the first fixing flange 44, and the filtrate rotation hole of the first rotating flange 46 is formed in both holes. By associating 55, both the filtrate recovery path switching mechanism 4 and the blow supply path switching mechanism 5 can be provided on the side of the first fixed flange 44 and the first rotating flange 46. That is, the filtrate can be recovered and blown by one of the filtrate recovery pipes 34. According to this, the number of parts can be reduced.

Further, the filter medium attached to the leaf head 2 is not limited to the filter cloth, and may be a filter paper or a solid filter medium.
The case shape of the leaf head 2 is not limited to the rectangular shape, but may be a cylindrical shape, a truncated cone shape, a pyramidal trapezoidal shape, or the like, and is not limited as long as it is a three-dimensional shape.
As the leaf head drive mechanism 3, in the embodiment, a rotary shaft 30 is provided, the leaf head 2 is supported by the rotary shaft 30, and the leaf head 2 is circulated and moved. However, the present invention can be implemented without limitation. Is. For example, the leaf head 2 may be attached to the circulating chain to circulate the leaf head 2. Further, the leaf head 2 may be reciprocated in a straight line.

1 Filtration test device 2 Leaf head 3 Leaf head drive mechanism 4 Filter liquid recovery path switching mechanism 5 Blow supply path switching mechanism 6 Filtration chamber 11 Filter cloth (filter material)
30 Rotating shaft 31 Rotating flange 32 Strain recovery path 33 Blow supply path 34 Strain recovery tube 35 Blow supply tube 37 Slurry container 44 1st fixed flange 45 2nd fixed flange 46 1st rotating flange 47 2nd rotating flange 53 Strain Discharge section 54 Filter liquid fixing hole 55 Filter rotating hole 56 Rotating base flange 57 Rotating sliding contact flange 59 Fixed base flange 60 Fixed sliding contact flange 61 Circular groove 62 Through hole 64 Ended annular hole 64A Starting end 64B Termination 66 Biasing means 71 Blow inflow part 72 Blow fixing hole 73 Blow rotating hole 74 Rotating base flange 75 Rotating sliding contact flange 77 Fixed base flange 78 Fixed sliding contact flange 82 Blow hole 92 Cake recovery part

Claims (2)

A leaf head that filters the slurry with a removable filter medium and stores the filtrate in the internal filtration chamber,
A leaf head drive mechanism that moves the leaf head between a position where the filter medium is immersed in the slurry and a position away from the slurry.
A filtrate recovery path switching mechanism that switches the filtrate recovery path formed between the filtration chamber and the filtrate discharge section between a communicating state and a non-communicating state.
The blow supply path formed between the filtration chamber and the blow inflow section is switched between a communicating state and a non-communicating state, the filter medium is at a position away from the slurry, and the filtrate recovery path is not communicating. A blow supply path switching mechanism that switches the blow supply path to a communication state when in the state,
Equipped with
The leaf head drive mechanism is
A rotating shaft that rotates around the axis and
A rotary flange that extends outward from the rotary shaft and rotates integrally with the rotary shaft.
A pipe material that connects the leaf head and the rotary flange to form the filtrate recovery path and the blow supply path, and
Equipped with
The leaf head is a filtration test apparatus characterized in that it is attached to the pipe material by a one-touch coupler. A leaf head that filters the slurry with a removable filter medium and stores the filtrate in the internal filtration chamber,
A leaf head drive mechanism that moves the leaf head between a position where the filter medium is immersed in the slurry and a position away from the slurry.
A filtrate recovery path switching mechanism that switches the filtrate recovery path formed between the filtration chamber and the filtrate discharge section between a communicating state and a non-communicating state.
The blow supply path formed between the filtration chamber and the blow inflow section is switched between a communicating state and a non-communicating state, the filter medium is at a position away from the slurry, and the filtrate recovery path is not communicating. A blow supply path switching mechanism that switches the blow supply path to a communication state when in the state,
Equipped with
The leaf head drive mechanism is
A rotating shaft that rotates around the axis and
A rotary flange that extends outward from the rotary shaft and rotates integrally with the rotary shaft.
A pipe material that connects the leaf head and the rotary flange to form the filtrate recovery path and the blow supply path, and
Equipped with
A fixed flange that comes into contact with the outer end surface of the rotary flange is provided.
The rotary flange is composed of a first rotary flange and a second rotary flange that sandwich the leaf head in the axial direction.
The fixed flange is composed of a first fixed flange that contacts the outer end surface of the first rotary flange and a second fixed flange that contacts the outer end surface of the second rotary flange.
The pipe material includes a filtrate recovery pipe that connects the leaf head and the first rotary flange to form the filtrate recovery path, and the blow supply path that connects the leaf head and the second rotary flange. Consists of a blow supply pipe and consists of
The filtrate recovery path switching mechanism performs a communication or non-communication switching operation between the filtrate fixing hole formed in the first fixing flange and the filtrate rotation hole formed in the first rotating flange.
The filtration supply path switching mechanism is characterized in that it performs a communication or non-communication switching operation between the blow fixing hole formed in the second fixing flange and the blow rotation hole formed in the second rotating flange. Test equipment.

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