JPH0411243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mechanism for opening and closing a filter plate of a filter press.

[Background of the invention]

The structure and operation of the filter press are shown in Figures 6 to 9.
This will be explained below based on the figures. In the figure, 1 is a machine frame, and on the underframe 1C of the machine frame 1 are front and rear frames 1A,
1B is erected, and left and right side frames 1D and 1E are spanned between the front and rear frames 1A and 1B. Filter plate 2 is the seventh
As shown in the figure, it consists of a frame 3A and a plate 3B surrounded by the frame 3A, and a large number of grooves 3C are formed in the vertical direction on the surface of the plate 3B to facilitate the outflow of the filtrate. It has an introduction hole 3D for the liquid to be treated in the center, and a guide hole 3F in the bulge 3E of the frame 3A at the lower corner. It communicates with the inner horizontal groove 3J. Furthermore, support arms 3H and 3I are extended from the left and right side edges of the filter plate 2. To attach a plurality of filter plates 2 to the machine frame 1, the support arms 3H and 3I of the filter plates 2 are attached to the machine frame 1.
It is supported by the left and right side frames 1D and 1E. A fixed plate 4 is disposed at the front end of the plurality of filter plates 2, and a press plate 5 to which a pressing rod 6 is connected is disposed at the rear end. The pressing rod 6 is screwed into a female thread block 8 with a drive gear 7 provided at the front end of the machine frame 1. Drive gear 7 communicates with electric motor 9 via gear 7A. For filtration, as shown in FIG. 8, a filter cloth 10 is clamped between filter disks 2, and the plurality of filter disks 2 are clamped and fixed between a fixed plate 4 and a press plate 5. In this way, when the plurality of filter plates 2 are closed, each filter plate 2
To-be-processed liquid introduction path 1 formed by the introduction hole 3D of
2. There is a filtrate discharge path 13 formed by the introduction hole 3F, and the introduction path 12 is equipped with a pump 14 and a pressure gauge 15.
A press-in passage 16 for the liquid to be treated, in which a pressure adjustment tank 15 marked A is interposed, communicates via a fixed platen 4.

In the above configuration, the liquid to be treated is transferred from the injection path 16 to the introduction path 12 of the filtration block 11 by the pump 14.
At this time, the pressure is adjusted by the pressure adjustment tank 15. The liquid to be treated that is press-fitted into the introduction path 12 is filtered by the filter cloth 10 between each filter plate 2, the filtrate is discharged from the discharge path 13 through the communication hole 3G, and the solid content in the liquid to be treated is filtered through the filter cloth 10. Accumulate within 10. After the filtration process is completed, the gear 7 is moved by the electric motor 9.
A. The female screw block 8 is rotated via the drive gear 7 to open the press plate 5 to the dotted line position in FIG. 6, and then each filter plate 2 is opened to the dotted line position to remove the solid content in the filter cloth 10.

Previously, in the above filter press, each filter plate 2
To open the filter plate 2, the operator must use the support arms 3 from both sides of the filter plate 2.
It depended on carrying H and 3I by hand. However, this requires a lot of labor from the operator, so recently, conveyor means such as conveyors are provided on the left and right side frames 1D and 1E of the machine frame 1, and the conveyor means is equipped with a filter plate 2.
An automatic filter plate opening/closing device is provided which mechanically conveys the filter plate 2 by engaging or riding the support arms 3H and 3I of the filter plate. However, after filtration, the adhesion of the cake accumulated on the filter cloth held between the filter plates 2 causes adjacent filter plates 2 to stick to each other, making it difficult to open them one by one.

[Conventional technology]

Conventionally, in a filter press equipped with such an automatic filter plate opening/closing device, in order to separate the adjacent filter plates 2 and ensure that they open one by one, it is necessary to lock the filter plates together in the overlapping state of the filter plates in the filtration process. Various filter plate locking devices have been provided in which, after filtration, when the filter plate is sequentially opened from one end, only the engagement between the moved filter plate and the next filter plate is released. (For example, Japanese Patent Publication No. 46-40146,
JP-A No. 47-19465, JP-A No. 56-33618, JP-A No. 57-18927).

[Problem that the invention seeks to solve]

However, in the above-mentioned prior art, the structure of the filter press becomes complicated due to the need for a locking device, and additional maintenance is required accordingly, resulting in high price and operating costs of the device.

[Means for solving problems]

As a means for solving the above-mentioned conventional problems, the present invention provides a plurality of filter plates 2 with supporting arms 3H, 3I extending from the left and right side edges of the machine frame 1 to the left and right side frames 1D, 1E. In this filter press, a filter plate opening/closing device 20 which is moved back and forth by a drive source is attached to both sides of the machine frame 1 so as to be slidable back and forth by supporting the filter plate opening/closing device 2.
0 consists of a pair of contact pieces 20D and 20E that are made retractable and retractable by air cylinders 20B and 20C, one of which contacts the front surface of the filter plate support arms 3H and 3I, and the other. provides a filter plate opening/closing mechanism in a filter press which is brought into contact with the rear surfaces of the support arms 3H and 3I.

[Effect]

The effects of the present invention are as follows.

After filtration, when the filter plates 2 in the superposed state are sequentially moved rearward from one end to open, the filter plate opening/closing device 20 is stopped at the position of the rearmost filter plate 2, and the abutting piece 20D of the filter plate opening/closing device 20 is opened. ,20E as air cylinder 2
The filter plate support arm 3 is protruded by 0B and 20C.
After touching the front of H, 3I, remove the filter plate opening/closing device 2.
0 is moved backward to separate the filter plates from each other, and then the filter plate 2 is transported rearward. After the filter plate 2 is transported to a predetermined position, the filter plate opening/closing device 20 is stopped, and then moved forward, and the protruding abutment pieces 20D and 20E are retracted by the air cylinders 20B and 20C to open the new rearmost filter. The filter plate 2 is stopped at the position of the plate 2, and the filter plate 2 is transported rearward in the same manner as described above. When closing the filter plate 2, the filter plate opening/closing device 20 is stopped at the frontmost position of the opened filter plate 2, and the contact pieces 20D, 20E are connected to the air cylinders 20B, 20.
When the filter plate opening/closing device 20 is advanced after being projected by C and brought into contact with the rear surface of the filter plate support arms 3H, 3I, the filter plate 2 is transported forward by the filter plate opening/closing device 20. . After the filter plate 2 is transported to a predetermined position, the filter plate opening/closing device 20 is stopped, and then the filter plate opening/closing device 20 is moved backward, and the protruding abutment pieces 20D and 20E are retracted by the air cylinders 20B and 20C, and the new frontmost filter is removed. Stop at the position of plate 2,
The filter plate 2 is transported forward in the same manner as described above. The air cylinders 20B and 20C are highly reliable with few failures, and the abutment piece 20 is attached to the filter plate 2, etc.
Even if D and 20E are interfered with, the amount of protrusion of the contact pieces 20D and 20E is adjusted by the elasticity of the air.

〔Effect of the invention〕

Therefore, in the filter plate opening/closing mechanism of the present invention, the filter plates can be automatically pulled apart one by one and reliably opened without providing a filter plate locking device.

〔Example〕

The present invention will be described with reference to an embodiment shown in FIGS. 1 to 5. An automatic opening/closing device for a filter plate 2 is installed at both ends of a conventional filter press shown in FIGS. 6 to 9. The automatic opening/closing device consists of a chain 19 suspended by sprockets 17 and 18 at both ends, and a filter plate opening/closing device 20 attached to the chain 19. The sprocket 17 is connected to a motor 22 by a chain 21. Filter plate opening/closing device 20
As shown in FIG. 3, there is a casing 20A, a pair of air cylinders 20B and 20C housed within the casing 20A, and the air cylinder 20.
A pair of contact pieces 20 retracted by B and 20C
D, 20E, and one filter plate opening/closing device 20 has sensors 20F, 2 which are proximity switches at the front and rear.
0G, a sensor 20H, which is a proximity switch, is attached to the front side of the other filter plate opening/closing device 20.

In the above configuration, the following procedure is used to change the filter plate 2 from the open state shown by the dotted line in FIG. 2 to the closed state shown by the solid line.

(1) Motor 22 reverses → Filter plate opening/closing device 20 retreats (2) Sensor 20G detects the frontmost filter plate 2 (3) Motor 22 stops → Filter plate opening/closing device 20 stops (4) Timer operates (5) Air cylinder 20C operation → contact piece 20E protrudes (6) Motor 22 rotates normally → filter plate opening/closing device 20 moves forward (see Figure 4, the direction of the arrow is forward) (7) Sensors 20F and 20H move the front fixed plate 4
Detected (8) Motor 22 stopped → Filter plate opening/closing device 20 stopped (9) Air cylinder 20C activated → Contact piece 20E pulled in (10) Timer activated (11) Motor 22 reversed → Filter plate opening/closing device 20 retreated (12) Sensor At 20G, the filter plate 2 which has newly become the forefront is sensed (13) Motor 22 stops → Filter plate opening/closing device 20 stops Repeat from (4) below, but in (7), sensor 2
What F, 20H senses is the filter plate 2 that was transported last time after this time.

Next, in order to change the filter plate 2 from the closed state shown by the solid line in FIG. 2 to the open state shown by the dotted line in FIG.
After separating it from the filter plate 2, carry out the following procedure.

(1) Motor 22 rotates forward → Filter plate opening/closing device 20 moves forward (2) Sensors 20F and 20H detect filter plate 2 located at the rear end (3) Motor 22 stops → Filter plate opening/closing device 20 stops (4) Timer operates (5) Air cylinders 20B and 20C operate → contact pieces 20D and 20E protrude (6) Motor 22 reverses → filter plate opening/closing device 20 retreats (7) Timer operates (approximately midway between filter plate 2 and press plate 5) (8 ) Motor 22 stops → Filter plate opening/closing device 20 stops (9) Motor 22 rotates forward → Filter plate opening/closing device 20 moves forward (10) Sensor 20F or 20H detects filter plate 2 located at the rear end (11) Motor 22 stops → Filter plate opening/closing device 20 stops (12) Timer operates (13) Motor 22 reverses → Filter plate opening/closing device 20 retreats (14) Sensor 20G detects rear press plate 5 (15) Motor 22 stops → Filter plate opening/closing device 20 Stop (16) Timer operation (17) Air cylinders 20B, 20C operate → Contact pieces 20D, 20E are pulled in (18) Motor 22 rotates forward → Filter plate opening/closing device 20 advances (19) Sensors 20F, 20G move to the rearmost end Detects the old filter plate 2 (20) Motor 22 stops → Filter plate opening/closing device 20 stops Repeat from (4) below, but at (14), sensor 2
What the 0G senses is the filter plate 2 that was transported last time. In addition, in step 6 above, the filter plate 2 is transported rearward by retracting the filter plate opening/closing device 20, but in steps (6) to (12), the filter plate opening/closing device 20 is
By reciprocating the filter plate 2 by moving the filter plate 0 forward and backward, and applying vibration and separation force to the filter plate, the next filter plate 2 attached to the filter plate 2 is separated. In the above procedure, the filter plate opening/closing device 20 is designed to make only one round trip, but by repeating steps (6) to (12),
It may be made to go back and forth several times.

As described above, the sensor 20 of the filter plate opening/closing device 20
F, 20G, 20H are front or rear filter plates 2
(Fixed platen 4 or push platen 5) or by operating a timer, the motor 22 is rotated forward, reversed, and stopped, and the air cylinder lids 20B and 20C are actuated to open and close the filter plate in the forward direction. Sensors 20F, 20H are arranged on both sides of the device 20, and both sensors 20F,
If both 20H and 20H do not sense the filter plate 2, the timer
The reason why the motor 22 is prevented from starting or stopping is that when the front filter plate 2 is tilted as shown by the dotted line in Figure 4, the filter plate 2 is first detected by the sensor 20F, and if the sensor 20H is not attached. At this point, the motor 22 stops due to the signal from the sensor 20F, and the filter plate 2 is moved to the contact pieces 20D, 20.
I can't figure out E. So sensor 20F, 20
Combine H in an AND manner to connect both sensors 20F, 2
If 0H does not detect the filter plate 2, the timer and motor 22 will not operate or stop, and the filter plate 2 will be activated.
This made it possible to correct the inclination by pushing the filter plate 2 up to the next filter plate 2.

Other than this embodiment, sensors 20F, 20G, 20
H may be a photoelectric switch, or may be operated by a manual switch or the like without providing a sensor.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a plan sectional view of the filter plate opening/closing device, and FIG. 4 is a filter plate FIG. 5 is a partially cutaway plan view of conveyance, FIG. 5 is a partially cutaway front view of filter plate conveyance, FIGS. 6 to 9 show conventional examples, FIG. 6 is a side view, and FIG. 7 is a perspective view of filter plate. 8 is a sectional view of the filter plate side, and FIG. 9 is an explanatory diagram of the filter block. In the diagram, 1... Machine frame, 1D, 1E... Left and right side frames,
2... Filter plate, 3H, 3I... Support arm 20... Filter plate opening/closing device, 20B, 20C... Air cylinder,
20D, 20E...Abutting pieces.

Claims (1)

[Scope of Claims] 1. A filter press in which a plurality of filter plates with support arms extended from the left and right side edges are attached to the left and right side frames of the machine frame so as to be slidable back and forth by supporting the support arms on the left and right side frames of the machine frame. A filter plate opening/closing device that is moved back and forth by a driving source is installed on both sides, and the filter plate opening/closing device consists of a pair of abutting pieces that are made retractable by an air cylinder. 1. A filter plate opening/closing mechanism for a filter press, characterized in that one of the filter plate support arms contacts the front surface of the filter plate support arm, and the other of the filter plate support arms contacts the rear surface of the support arm. 2. A sensor for detecting the filter plate is attached to the filter plate opening/closing device, and the sensor communicates with the means for projecting and retracting the contact piece of the filter plate opening/closing device and the driving source. A filter plate opening/closing mechanism in a filter press as described in Scope 1.