JPH03217289A - scum gap - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for removing scum in a settling tank by tilting a pipe scum skimmer using the flight movement force of a sludge scraper. The scum skimmer is tilted at a greater angle than the set angle at regular intervals or at arbitrary intervals, allowing large floating scum to be discharged and collected while reducing the amount of sewage discharged. [Prior art] The scum skimmer in a sedimentation tank has a scum collection hole bored on one outer circumferential surface in the longitudinal direction, and the scum collection hole is always facing upward. The scum floating in the water is collected along with the sewage on the water surface. This pipe scum skimmer is generally rotated electrically or manually to close the scum collection hole.

In addition, without using any other power, the flight drive power of the sludge scraper installed in the sedimentation basin is used to automatically rotate the pipe scum skimmer to open and close it to collect the scum floating on the upstream side of the scum skimmer. A method to do so has also been proposed.

[Problem to be solved by the invention]

When discharging scum floating on the water surface by rotating the pipe scum skimmer, this floating scum is collected at the same time as the wastewater on the water surface is discharged.

For this reason, it is desirable to suppress the amount of wastewater flowing out during scum collection and discharge. In order to suppress the amount of water flowing out, the rotation angle of the pipe scum skimmer is set at a predetermined angle. For this reason, even if scum floating near the upstream side of the pipe scum gap can be collected, large scum, scum floating a little farther from the pipe scum gap, or even a large amount of scum floating near the pipe scum gap may occur. was difficult to collect efficiently. In the present invention, the rotation angle of the pipe scum skimmer can be arbitrarily set by the arrangement of the striker, and an object of the present invention is to efficiently recover scum upstream of the pipe scum skimmer, a large amount of scum, large scum, etc. while suppressing the amount of discharged water.

[Means to solve the problem]

This invention was made to achieve the above object, and a striker for forward rotation of the pipe scum skimmer is attached to a flight attached to a predetermined position between two parallel main body chains of a sludge scraper installed in a pond. A striker for reverse rotation is individually protruded, and levers for forward rotation and reverse rotation, which are tilted by this striker, are respectively protruded from a double tube shaft. In a scum skimmer in which a pipe scum skimmer is rotatably provided via a rod and a lever,
A striker for the flight that tilts the pipe scum skimmer in the normal direction is selectively arranged, one for a set angle and one for a larger tilting angle, and also for increasing the water level difference when the pipe scum clearance is tilted at a large angle. A holding piece for pressing down the floating weir is provided protrudingly, and when a large tilt occurs, the floating weir is returned to the set tilted position by the buoyancy of the float, and the return to the standby position is performed by a reversing striker lever. In addition, the return of the pipe scum clearance can be used for returning from a large tilt position to a set position, as well as for forward rotation, and for returning from a set position to a standby position. This is done using a striker and lever for returning to the position and for reversing.

Further, the normal rotation and reversal of the pipe scum skimmer is performed by swinging a V-shaped lever with a striker for forward rotation and reversal provided on the flight when the flight moves along the pond bottom, or by swinging a V-shaped lever. The main idea is to combine this with buoyancy to perform a return.

〔Example〕

The scum skimmer of the present invention will be explained below based on the illustrated embodiments.

In the figure, 1 is a sedimentation tank with the required size and shape,
A sludge scraper 2 is disposed in the longitudinal direction or any direction of this settling tank l, and this sludge scraper 2 is installed between two parallel main body chains 22a and 22b stretched over a subrocket wheel. A large number of flights 23 are arranged and fixed at regular intervals or arbitrary intervals. flight 2
3 scrapes up the scum floating on the water surface toward the end of the pond or toward the scum removal position where a pipe scum skimmer is installed, and at the bottom of the pond, scrapes the settled sludge toward the discharge port.

A striker 3a for forward rotation of the pipe scum clearance is attached to any one of these flights 23, and another flight 23 is
In this case, a striker 3b for reversing the pipe scum skimmer is fixed in a protruding manner with both strikers 3a and 3b arranged in a relative relationship with a required spacing in the longitudinal direction of the chain. In the pond, an intermediate shaft 4C for forward rotation, whose both ends are supported by bearings 4a and 4b, is installed so as not to hinder the operation of the flight 23 of the sludge scraper 2, and this shaft 4C has a reverse rotation rotation shaft 4C. The pipe shafts 4d are supported concentrically, and each shaft 4
A forward rotation lever 40 and a reverse rotation lever 41 having levers protruding from shafts 4C and 4d, respectively, are projected downward from shafts 4C and 4d, and the tips of these levers 40 and 41 are connected to the strikers 3a and 4d, respectively. 3b, and when the striker moves, the shafts 4c and 4d are rotated via this lever. The forward rotation lever 40 and the reverse rotation lever 4l may protrude in the same direction or in different directions, and the forward rotation lever 40 and the reverse rotation lever 4l may protrude in the same direction or in different directions. Similarly, the lever is configured to be oscillated by a striker 3b for reverse rotation.

Further, a drive lever 42 for forward rotation is attached to the intermediate shaft 4C for forward rotation.
Reverse drive levers 43 are protruded from the reversal vibe shaft 4d, and a forward rotation rod 45 and a reverse rotation rod 46 are pivoted at the tips of the levers 42, 43, respectively. Both ends of the pipe scum skimmer 50 are rotatably supported at predetermined positions in the sedimentation basin 1 via support rollers 6 &+6a of bearing stands 6, 6, and one or more scum collection ports 5H are provided on the outer peripheral surface of the pipe scum skimmer 50. A forward rotation lever 47 and a reverse rotation lever 4 are provided at one end of this pipe scum clearance 5.
8 is provided, and the rods 45 and 4B are pivotally connected to both levers 47 and 48, and the pipe scum clearance 5 is tilted and
This is a choice to return. In addition, 8 in the figure is a floating weir with floats 81 installed at both ends, which floats and sinks following the water surface, and is installed parallel to the upstream side of the pipe scum clearance 5, and a fixed weir 9 is installed parallel to this floating weir 8. provided.

As shown in Fig. 2, this float 81 has a tapered inner side surface so that scum floating on the water surface naturally flows into the scum skimmer by the water flow flowing into the pipe scum skimmer. The scum collection port 5H is securely connected so that the scum does not flow along the tapered surface of the float 81 to the bearing at the end of the pipe scum clearance.
Allow yourself to be guided. As shown in FIGS. 5 and 6, a holding piece 5P is provided in a protruding manner on the pipe scum clearance 5 to press down a part of the float or floating weir 8 from its upper part. When this is made larger than the predetermined tilting angle of the pipe scum clearance, when the pipe scum clearance is rotated beyond the set angle, a part of the floating weir is pushed down, and the water surface Wl and the floating weir top surface W2 are
The water level difference between the

When the pipe scum skimmer 5 is tilted at a set angle, a normal striker is used.When the tilt angle is larger than the set angle, the shape of the striker is made longer as shown in the figure, or the upper end is bent, and the striker and lever are This is done by increasing the contact time of the lever 40, thereby increasing the swing angle of the lever 40.

Therefore, the long striker 3al shown in FIG. 3 is used for a large swing angle, and the short striker 3a2 is used for a set swing angle.

This long striker 3al is installed every predetermined plurality of short strikers 3a2. As shown in FIG. 4, the return (reverse) striker 3b has the same length as the short striker 3a2 for forward rotation. Next, the operation will be explained.

In a neutral state where the scum collection port 5H is facing upward, the flight is moved by the scraper and when the lever 40 is kicked by the striker 3a2, the lever 40 is moved through the O-tube 45 as shown in FIG. Then, the pipe scum clearance is tilted upstream only by a preset angle. As a result, the upper end of the floating weir is at a position below the water surface W, so the scum floating on the water surface due to this water level difference flows into the pipe scum gap and is collected together with the wastewater. Further, the tilted pipe scum clearance is reversed and returned by kicking the lever 41 with the reverse striker 3b.

Therefore, the forward rotation striker and the reverse rotation striker are arranged at a required interval in the front and back of the flight direction, and the interval between the two strikers 3a and 3b becomes the time during which the pipe scum skimmer 5 tilts and collects the scum.

When tilting at this set angle, floating scum near the upstream side of the pipe scum skimmer is collected, but if floating scum, large scum, or a large amount of scum is further away, the water level difference will be small at the set angle of the pipe scum skimmer. , scum collection is a little difficult. To solve this problem, when tilting the pipe scum skimmer periodically at a set angle,
At certain intervals, the pipe scum skimmer tilts further, increasing the water level difference between the water surface and the top of the floating weir. This is achieved by kicking the lever 40 with a long striker 3a1 to increase the swing angle of the lever 40, and at the same time, a presser piece 5P protruding from the pipe scum skimmer that tilts greatly.
This is done by pushing down the top of the floating weir against the buoyancy of the float. After the pipe scum skimmer has tilted significantly beyond this set tilt angle, when the striker 3al passes from the lower end of the lever 40, the floating weir is raised by the buoyancy of the float to the position where the pipe scum skimmer is tilted by the short striker and waits. do. Then, by kicking the reversing lever 41 with the reversing striker, the pipe scum clearance is returned to its original position.

In addition, in the above embodiment, the return of the pipe scum clearance is performed from the large tilt position to the set position by using the buoyancy of the float, and from the set position to the standby position is performed using the striker and lever in the same way as during forward rotation. However, by using the same lever or striker as for forward rotation, the return operation of the pipe scum skimmer can be performed by a combination of the striker and lever using the moving force of the flight without using the buoyancy of the float.

Furthermore, when the flight moves along the pond bottom, the striker of this flight operates the forward rotation and reverse levers to cause the pipe scum skimmer to rotate forward or reverse (return).

An embodiment of this case is shown in FIG.
1, that is, the portion that contacts the striker 3a or 3b is V-shaped with 40a, 40b and 41a, 4lb. [Effects of the Invention] According to the present invention, the pipe scum skimmer is tilted with strikers of different lengths provided in the flight at large and small tilting angles, so that a large amount of scum or large scum can be removed. can be collected periodically, and
Using the buoyancy of the float installed on the floating weir, the tilting angle is automatically returned from the large tilting angle to the small tilting angle, and the reversing striker,
Since this is done using a lever, standard reversing strikers and levers can be used. There is also the advantage that the large tilting angle of the pipe scum gap can be changed by replacing the tilting striker with one having a different length.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing the scum skimmer of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a longitudinal sectional side view showing the state of the pipe scum skimmer when it is tilted, and Fig. 4 is a longitudinal sectional side view when the pipe scum skimmer is inverted. FIG. 5 is an enlarged side view of the main part, FIG. 6 is a plan view of the same, and FIG. 7 is a longitudinal sectional side view of a different embodiment. 1 is a sedimentation tank, 2 is a sludge scraper, 22a and 22b are chains, 23 is a flight, 3a is a striker for forward rotation, 3b is a striker, 40 is a lever for forward rotation, and 4l is a lever for reverse rotation.
4c and 4d are shafts, 45.46 are lots, 5 is a pipe scum skimmer, 5H is a scum collection port, 5P is a holding piece, 8 is a floating weir, and 81 is a float.

Claims (1)

[Claims] (1) A striker for normal rotation of the pipe scum skimmer and a striker for reverse rotation are separately protruded from the flights attached at predetermined positions between the two parallel main body chains of the sludge scraper installed in the pond. , Levers for forward rotation and reverse rotation tilted by this striker are provided protruding from the double tube shaft, respectively, and the pipe scum clearance can be freely rotated from this double tube shaft via rods and levers for forward rotation and reverse rotation, respectively. In the scum skimmer installed in the pipe scum skimmer, a flight striker for forward tilting of the pipe scum skimmer is selectively installed, one for a set angle and one for a larger tilting angle. A holding piece is installed to press down the floating weir in order to increase the difference, and in the case of large tilting, the floating weir is returned to the set tilted position by the buoyancy of the float, and the return to the standby position is performed using the reversing striker lever. A scum skimmer that is characterized by doing things like this. (2) In the scum skimmer according to claim 1, the return of the pipe scum skimmer from the large tilting position to the set position, and the return from the set position to the standby position are performed by a striker for reversing the flight that moves along the pond bottom. The scum skimmer is operated by kicking a lever with a V-shaped tip.