JPH08266936A - Sludge recovery apparatus - Google Patents

Abstract

PURPOSE: To rapidly recover sludge while achieving miniaturization and cost reduction. CONSTITUTION: A plurality of rotary drum bodies, a discharge blade driving means 51, a moving drive means 81 and a position control means are provided. During the centrifugal separation of sewage by one rotary drum body 10A, the discharge blades 21 of the other rotary drum body 10B and the discharge blade driving means 51 are connected to scrape out sludge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge recovery device for recovering sludge by centrifuging waste liquid containing sludge such as paint particles discharged from a coating booth.

[0002]

2. Description of the Related Art For example, as shown in FIG. 7, a conventional sludge recovery device has a device body frame 1, a rotating drum body 10
(Drum 11, discharge blade 21), drum rotation drive device 3
1, including the stopper portion 41, the sludge containing sludge is centrifugally separated to deposit sludge on the inner surface 11i of the drum, and the sludge can be scraped out and collected. The sludge thus recovered has a low water content (for example, 20 to 60%) and does not occupy a large volume, so that the sludge can be easily disposed of.

Specifically, the drum 11 has a lower opening 1
2 and has a holder 16 and a hollow main shaft 15 rotatably held by the holder 16 and is rotatably held by a substrate 1B of the apparatus main body frame 1 about a rotation axis 15a. There is. A clean water extraction port 14 is provided in a portion of the upper lid 13 of the drum 11 near the main shaft 15.

A discharge blade 21 is housed in the drum 11 rotatably around the axis (15a) of the blade shaft 25. The blade shaft 25 is a main shaft 1 via a bearing.
5 is inserted so as to be relatively rotatable.

Further, the drum rotation drive device 31 includes a drive motor 32 and a belt transmission mechanism 35, and is capable of rotating the drum 11 in a predetermined direction via the main shaft 15 and the drum 1
When the rotation of 1 is stopped by the stopper portion 41, the independent rotation of the discharge blade 21 is allowed. When the drum rotation drive device 31 is driven to rotate the main shaft 15, the blade shafts 25 follow and rotate in the same direction due to the frictional force generated between the blade shafts 25 and the main shaft 15.

The stopper portion 41 includes a locking portion 42 with a slit groove 43 provided on the upper lid 13 of the drum 11,
A stopper bar 44 is provided on the base plate 1B of the apparatus main body frame 1 so as to project / retract with respect to the slit groove 43, and a cylinder device 46 with a built-in cushion for projecting / retracting the stopper bar 44. When the rod 44 is projected downward, the limit switch 45 inserted into the power supply circuit (not shown) of the drive motor 32 is turned off to disable the drive motor 32, and the tip portion of the stopper rod 44 is The slit 1 is engaged with the slit groove 43, and the drum 1
1 is forcibly stopped.

In FIG. 7, numeral 5 is a nozzle, which is a drum 11.
It is formed so that sewage (sewage) can be supplied into the drum 11 through the lower opening 12 of the. In this nozzle 5,
The sewage is sent through a sewage supply pipe 6 in which an electromagnetic on-off valve 7 is interposed.

Further, the sludge recovery device is provided with a discharge blade driving means 51P for driving the discharge blade 21 in order to improve handling. Discharge blade driving means 5
1P is a means that has a connecting portion (engaging cap 52) that can be connected to the blade shaft 25 of the discharging blade 21, and rotationally drives the discharging blade 21 via this connecting portion (engaging cap 52).

That is, the discharge blade driving means 51P includes an engaging cap 52, a cap elevating part 53P and a cap rotation driving part 62P, and the engaging cap 52 is connected to the blade shaft 2.
5 from the standby position P1 above the blade shaft 25
It is formed so that it can be connected to the engagement corner portion 28 formed at the tip end of the, and can be rotated in that state and lifted to release the connection with the engagement corner portion 28.

More specifically, the cap elevating part 53P includes an elevating shaft 54, a connecting member 55, and an elevating cylinder 57, and lowers and raises the engaging cap 52 to form the standby position P1 and the engaging corner portion 28 of the blade shaft 25. It is configured such that it can be selectively positioned and held at the connecting position P2 to be connected.

A lower end of the elevating shaft 54 is connected to the engaging cap 52, and an upper end of the elevating shaft 54 is rotatably connected to the engaging cylinder 56 of the connecting member 55 via an axis or the like through an axis 54a. Has been done. Both ends of the connecting member 55 are held by the lifting cylinders 57 so as to be lifted and lowered.

The cap rotation drive portion 62P includes a hollow power transmission shaft 63, a drive motor 65 and a belt transmission mechanism 66, and the engagement cap 52 is rotatable about the axis 54a of the elevating shaft 54. ing.

The power transmission shaft 63 is for transmitting rotational power to the elevating shaft 54, and is formed so that the elevating shaft 54 can be relatively moved in the direction of the axis 54a and cannot be relatively rotated. The power transmission shaft 63 is rotatably provided on the substrate 1C of the apparatus main body frame 1 via a holder 64, and is connected to a drive motor 65 via a belt transmission mechanism 66.

Therefore, when the drive motor 65 is driven, the engagement cap 52 is rotated while being allowed to move up and down via the belt transmission mechanism 66, the power transmission shaft 63 and the lifting shaft 54.

In order to recover sludge using the above sludge recovery device, first, a centrifugal separation step is performed for a predetermined time (for example, 60 minutes). That is, the drive motor 32 is driven to rotate the drum 11 at a high speed, and the opening / closing valve 7 is opened to supply dirty liquid (dirty water) into the drum 11. Then, the waste liquid supplied into the drum 11 is centrifuged, and the sludge S is deposited on the inner surface 11i of the drum 11 in a cake shape (see FIG. 8A).

The liquid component (clean liquid) separated and purified from the sludge S passes through the clean water extraction port 14 of the drum 11 and the internal passage 1A and is discharged to the outside from the discharge pipe 1P.

Next, the discharging process is performed for a predetermined time (for example, 10 minutes).
Minutes) do. That is, the stopper portion 41 is operated to stop the rotation of the drum 11, and in that state, the engagement cap 52 of the discharge blade drive means 51 is fitted to the engagement corner portion 28 formed at the tip end portion of the blade shaft 25. By rotating the discharge blade 21 using the cap rotation drive portion 62P in this state, the low water content sludge (S) is scraped out of the drum 11 by the discharge blade 21 as shown in FIG. It is dropped into the sludge storage cart 9 of.

[0018]

By the way, in the above sludge recovery device, the centrifugal separation step cannot be executed while the sludge S is being scraped by the discharge blade 21, and the sludge recovery takes too much time.

Therefore, in order to reduce the sludge recovery time, it is conceivable that a plurality of sludge recovery devices (for example, two) are installed and sludge recovery is performed simultaneously.

As a result, the sludge collection time can be shortened, but a large installation space is required and equipment costs are too high, which is a troublesome problem.

In view of the above circumstances, an object of the present invention is to provide a sludge recovery device which can speedily recover sludge while achieving downsizing and cost reduction.

[0022]

According to the present invention, when the drum is rotated to centrifuge the waste liquid, the discharge blade does not have to be rotationally driven by the discharge blade driving means. Paying attention to the fact that it takes longer than the time required to rotate the discharge blade to scrape out the sludge, while rotating the discharge blade of the other rotary drum while centrifugally separating the waste liquid with one rotary drum. The sludge can be scraped out to achieve the above object.

That is, the present invention has a rotating drum body composed of a drum and discharge vanes housed in the drum, and centrifugally separates the waste liquid supplied into the drum by rotationally driving the drum. In a sludge recovery device configured to be capable of accumulating sludge in filth on the inner surface of the drum and rotating the discharge blades while the drum is stopped to scrape out sludge in the drum, a plurality of rotating drum bodies are separated from each other. Discharge blade driving means that is provided and has a connecting portion that can be connected to the blade axis of the discharge blade of an arbitrary rotating drum body, and that can rotate the discharge blade through the connecting portion; The moving driving means capable of moving the rotating drum body relative to each other and the moving driving means so that the connecting portion of the discharging blade driving means is positioned so as to be connected to the blade shaft of the discharging blade of the selected rotating drum body. Characterized by providing a position control means for driving and controlling means.

[0024]

According to the present invention having the above-described structure, while rotating the drum of one rotating drum to centrifuge the waste liquid,
The position control means drives and controls the movement driving means to position the connecting portion of the discharge blade driving means at a position where it can be connected to the discharge blade of another rotating drum body. Next, the discharge blade driving means is driven to connect the connecting portion and the blade axis of the discharge blade, and the discharge blade is rotationally driven through the connecting portion.

Thus, while the waste liquid is centrifugally separated by one rotating drum body, the sludge can be scraped out by the other rotating drum body. Since the sludge scraping is completed in a shorter time than the sewage centrifugal separation, immediately after the sewage centrifugal separation, the sludge scraping is performed by using the discharge blade driving means which has already scraped the sludge with another rotating drum body. be able to.

As described above, since the discharge vane driving means is shared and the centrifugal separation of the waste liquid and the scraping of the sludge can be performed by the respective rotary drum bodies without leaving an interval therebetween, the number of constituent parts can be reduced and the size and cost can be reduced. The sludge can be recovered quickly.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) This sludge recovery device is shown in FIGS.
As shown in Fig. 7, the basic structure is similar to that of the conventional example (Fig. 7), but a plurality of (for example, two) drum rotating bodies (10A,
10B), discharge blade drive means 51, and movement drive means 8
1 and position control means (72, 73) are provided, and while one rotary drum body (10A) is centrifuging sewage, the other rotary drum body (10B) is discharged using the discharge blade drive means 51. Sludge can be scraped out by rotating the blade 21.

The same components as those of the conventional example (FIG. 5) are designated by the same reference numerals, and the description thereof will be simplified or omitted.

The first and second rotary drum bodies (10A,
As shown in FIG. 1, 10B) are arranged side by side at a predetermined distance.

Further, the discharge blade driving means 51 is used for the discharge blades 2 of the first and second rotary drum bodies (10A, 10B).
It is a means that has a connecting portion (52) that can be connected to one blade shaft 25 and that rotationally drives the discharge blade 21 via the connecting portion (52).

In this embodiment, the discharge blade driving means 51
Includes an engaging cap 52, a cap elevating portion 53, and a cap rotation driving portion 62, and lowers the engaging cap 52 from a standby position P1 above each blade shaft 25 to connect it to the engaging corner portion 28. It is configured such that it can be rotationally driven in the state and can be lifted to release the connection of both (52, 28).

In the discharge blade driving means 51, a power transmission shaft 63 is rotatably provided on a moving base 82 described later via a holder 64, and an elevating shaft 54 is centered on an axis line via a rotary joint 59. Since it has the same structure as the discharge blade driving means (51P) of the conventional sludge recovery device except that it is connected to the lifting cylinder 57 so as to be lifted and lowered while being allowed to rotate, the description thereof will be omitted.

The moving drive means 81 is the discharge blade drive means 5
It is a means for relatively moving 1 and each rotary drum body (10A, 10B). In this embodiment, a movable table 82, a linear guide mechanism 83, and a cylinder device 86 are included, and the discharge vane drive means 51 can be laterally moved above the respective rotary drum bodies (10A, 10B) within a predetermined stroke range. Is configured.

The linear guide mechanism 83 is a pair of horizontally arranged support members 89 mounted on the upper part of the apparatus main body frame 1 so as to be positioned a predetermined distance above the rotary drum bodies (10A, 10B). Straight guide bar (85,
85) and the guide rods 85 are slidably fitted to the movable table 8
2 and a bearing portion 84 fixed to 2. The cylinder device 86 is attached to the right end of the support member 89 in FIG. 1.

Piston rod 86a of cylinder device 86
Is connected to the moving base 82, and the cylinder device 86 uses pneumatic pressure to project and retract the piston rod 86a to move the moving base 82 horizontally along the guide rod 85 within a predetermined stroke range. It is movably installed. As shown in FIG. 2, a positioning member 88a capable of restricting the lateral position of the movable table 82 is provided on the upper portion of the support member 89.
A shock damper 88b is provided.

In the position control means, the connection portion (engagement cap 52) of the discharge blade driving means 51 can be connected to the blade shaft 25 of the discharge blade 21 of the selected rotary drum body (10A or 10B). It is a means for driving and controlling the movement drive means 81 (cylinder device 86) so that the movement drive means 81 (cylinder device 86) is positioned.

In this embodiment, the position control means is constructed by utilizing some of the constituent elements of the control device 71 for driving and controlling the entire sludge recovery device and its functions. The control device 71 includes a CPU 72, a ROM 73, and an R as shown in FIG.
AM74, keyboard 75, input / output port (I / O) 7
It is composed of 6 etc. At the input / output port 76, the drive motor 32 of the drum rotation drive device 31, the opening / closing valve 7, the drive cylinder device 46 of the stopper portion 41, the lift cylinder 57 of the discharge blade drive means 51, the drive motor 65 and the cylinder of the movement drive means 81. The device 86 and the like are connected. The position control means is composed of a ROM 73 for storing a position control program for the discharge blade driving means 51 and a CPU 72.

In this embodiment, the position control means (72, 7
Locking means 87 is provided so that the discharge blade driving means 51 positioned in 3) can be locked more reliably.
The locking means 87 includes an engaging body (87A, 87B) provided on the rotating drum body (10A, 10B) side, and a moving base 82.
And a locking cylinder 87C attached to the locking cylinder 87C when the discharge blade driving means 51 is positioned above the rotating drum body (10A or 10B) by the position control means (72, 73). The locking member 87b provided at the tip of the piston rod and the engaging body (87A or 87B) are engaged with each other so that the moving base 82 can be locked more reliably.

More specifically, the engaging members (87A, 87A)
B) is a holder 87h on the substrate 1B of the apparatus main body frame 1.
A locking rod 87i provided so as to be movable up and down through a spring 87j for elastically supporting the locking rod 87i, and the piston rod of the locking cylinder 87C is projected downward to form the locking rod 87i. When the lower end of the locking rod 87i is lowered through the locking member 87b, the slit groove 4 of the locking portion 42 is formed.
It is configured to be fitted in 3. It is also possible to use the locking means 87 instead of the stopper portion 41 to forcibly stop the drum 11 of each rotating drum body (10A, 10B). In the case of such a configuration, the stopper portion 41 becomes unnecessary, and it is possible to further reduce the size and cost.

Next, the operation of this embodiment will be described based on the timing chart shown in FIG. When centrifuging the waste liquid with the first rotating drum body 10A, the CPU 72
The on-off valve 7A is opened to supply the waste liquid into the drum 11, and the drive motor 32 is drive-controlled. This allows
The drum 11 rotates at a high speed and the discharge blade 21 follows and rotates, so that the sewage supplied into the drum 11 rotates, and the sludge (S) in the sewage on the drum inner surface 11i is rotated by the centrifugal force.
Are deposited.

While the waste liquid is being centrifugally separated by the first rotary drum 10A (required time t1, for example, 50 mi).
n), a CPU for scraping sludge from the second rotating drum body 10B for which the waste liquid centrifugation has already been completed.
72 is the engaging cap 52 of the discharge blade driving means 51 shown in FIG.
The cylinder device 86 of the movement drive means 81 is drive-controlled so as to be positioned at the standby position P1 above the blade shaft 25 of the second rotary drum body 10B as indicated by the two-dot chain line.

Next, the CPU 72 causes the discharge blade driving means 5
1 is drive-controlled to lower the engagement cap 52 to the connecting position P2, and the engagement corner portion 28 of the blade shaft 25 is fitted. Then, the discharge blade 21 is rotationally driven to scrape out the sludge for a predetermined time t2 (for example, 10 minutes).

After scraping off the sludge, the CPU 72 raises the engagement cap 52 to the standby position P1 and then drives the piston rod 86a of the cylinder device 86 backward to return it to its original position (the position shown by the solid line in FIG. 1). Let When the waste liquid centrifugal separation in the first rotating drum body 10A is completed, the sludge is immediately scraped out by using the discharge blade driving means 51.

Therefore, according to the first embodiment, the first
Further, the second drum rotating body (10A, 10B), the discharge blade driving means 51, the movement driving means 81, and the position control means (72, 73) are provided, and one rotating drum body (10
While centrifuging the waste liquid in (A), another rotating drum body (10
Since the discharge blade 21 of B) and the discharge blade driving means 51 are connected to each other so that sludge can be scraped out, the discharge blade driving means 51 is shared and each rotary drum body (10A, 1).
In 0B), sewage centrifugal separation and sludge scraping can be performed without leaving an interval. Therefore, sludge can be promptly collected while achieving downsizing and cost reduction.

Further, since the moving base 82 is locked by the locking means 87 while being directly aligned with the rotating drum body (10A or 10B), the engaging cap 52 and the rotating drum body (10A or 10B) are locked. The sludge scraping work can be performed by connecting the blade shaft 25 of 10B) more smoothly and surely.

(Second Embodiment) The second embodiment is shown in FIGS. 5 and 6. The sludge recovery device according to the second embodiment includes a plurality of (for example, two) rotary drum bodies (10A, 1).
0B) side is moved (rotated) with respect to the discharge blade drive means 51.
Thus, the sludge can be scraped out by the rotating blade body (10A) while centrifuging the sewage while the other rotating drum body (10B) uses the discharge blade driving means 51. The movement driving means 81 is provided on the apparatus main body frame 1 with the axis 9
A turntable 92 rotatably mounted about 2a
And a rotary drive means 93 capable of indexing and rotating the rotary table 92 at a pitch of 180 °.

The rotation driving means 93 is an indexing motor 94.
And a gear 94D mounted on the motor 94, and a gear 94E provided on the outer peripheral surface of the rotary table 92 so as to mesh with the gear 94D.

Further, on the turntable 92, the first and second rotary drum bodies (10A, 10B) are arranged on the same circumference at a predetermined pitch (180 ° pitch). The drum 11 of both rotating drum bodies (10A, 10B) is configured to be rotated by a single drive motor 95 via a power transmission mechanism 96.

The power transmission mechanism 96 is a driven pulley (98A, 98B) having a built-in one-way clutch, and is capable of normal and reverse rotation mounted on the apparatus main body frame 1 side so that its axis matches the axis of the rotary base 92. Drive motor 95 and a drive pulley 98D mounted on the rotary shaft of the drive motor 95
Drive pulley 98D and driven pulleys (98A, 98
B) An endless belt (98P, 9)
8Q).

A one-way clutch (not shown) built in the driven pulley 98A transmits rotational power to the drum 11 side of the rotary drum body 10A when the drive motor 95 rotates in the forward direction, and shuts off rotational power when it rotates in the reverse direction. Is configured. On the other hand, a one-way clutch (not shown) built in the driven pulley 98B shuts off rotational power transmission to the drum 11 side of the rotary drum body 10A when the drive motor 95 rotates in the forward direction, and transmits rotational power when it rotates in the reverse direction. Is configured.

Therefore, when the drive motor 95 is rotated in the normal direction, the drum 1 of the first rotating drum body 10A on the right side in FIG.
1 rotates, and the left rotary drum body (10B)
When the drum 11 of the right side stops and is reversed, the right drum 11
Stops and the drum 11 on the left rotates.

The discharge blade driving means 51 is fixed to the apparatus main body frame 1 side so as to be located above the rotary drum body (10A) positioned leftward in FIG.
The discharge blade drive means 51 has the same structure as that of the first embodiment, and therefore its details are omitted. Also, FIG.
The reference numeral 99 denotes a locking means for locking the rotary base 92, but since it has the same structure as the locking means (87) of the first embodiment, its details are omitted. Note that the stopper portion that exhibits the same function as the stopper portion 41 of the first embodiment is omitted in the drawing.

Next, the operation of the second embodiment will be described. While the first rotary drum body 10A on the right side in FIG. 5 is centrifuging the waste liquid, the discharge blade 21 of the second rotary drum body 10B on the left side is rotationally driven by the discharge blade driving means 51 to scrape out the sludge. .

After the centrifugal separation of the waste liquid, the rotary table 92 is rotated half a turn to supply the waste liquid into the drum 11 of the second rotary drum body 10B which is positioned and held to the right for centrifugal separation, and at the same time, to the left. The sludge in the drum 11 of the first rotary drum body 10A positioned and held in this direction is scraped out.

Therefore, the discharge blade driving means 51 can be shared and the two rotary drum bodies (10A, 10B) can be subjected to the centrifugal separation step without leaving an interval, and the sludge can be quickly recovered. .

Further, since the drum 11 of each rotary drum body (10A, 10B) is rotationally driven by one drive motor 95, the structure can be further simplified, and the size and cost can be reduced.

In the above embodiment, the two rotary drums (10A, 10B) are installed on the rotary table 92, but the number of installed rotary drums is not limited to this. For example, three rotary drum bodies (10A, 10B) may be installed on the turntable 92.

[0058]

According to the present invention, a plurality of drum rotating bodies, a discharging blade driving means, a moving driving means and a position control means are provided, and one rotating drum body is used during centrifugal separation of waste liquid. Since the discharge blades of the other rotating drums and the discharge blade driving means are connected to each other so that sludge can be scraped out, the discharge blade driving means can be commonly used to perform centrifugal separation of waste liquid and sludge scraping between the rotating drums. Can be done without a gap. Therefore, sludge can be promptly collected while achieving downsizing and cost reduction.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a first embodiment of the present invention.

FIG. 2 is likewise a plan view for explaining the movement driving means.

FIG. 3 is likewise a block diagram mainly for explaining a control unit.

FIG. 4 is also a timing chart for explaining the operation.

FIG. 5 is a diagram for explaining a second embodiment of the present invention.

FIG. 6 is likewise a plan view.

FIG. 7 is a diagram for explaining a configuration of a conventional example.

FIG. 8 is also a diagram for explaining a sludge recovery operation.

[Explanation of symbols]

 10A, 10B Rotating drum body 11 Drum 21 Discharging blade 25 Blade shaft 31 Drum driving device 41 Stopper portion 51 Discharging blade driving means 72 CPU (position control means) 73 ROM (position control means) 81 Moving drive means 82 Moving table 92 Rotating table

Claims (1)

[Claims] 1. A rotary drum body comprising a drum and discharge blades housed in the drum, and by rotating the drum, the waste liquid supplied into the drum is centrifugally separated to the inner surface of the drum. In a sludge recovery device configured to be capable of accumulating sludge in sewage and rotating a discharge blade in a state in which a drum is stopped to scrape out sludge in the drum, a plurality of the rotating drum bodies are arranged apart from each other, Discharge blade driving means having a connecting portion capable of connecting to the blade axis of the discharge blade of an arbitrary rotating drum body and capable of rotationally driving the discharge blade through the connecting portion; this discharge blade driving means and each rotating drum body Is controlled so that the connecting portion of the moving drive means capable of relative movement and the connecting portion of the discharge blade driving means are positioned at a position connectable with the blade axis of the discharge blade of the selected rotary drum body. Sludge recovery apparatus is characterized by providing a position control means.