JPH09166147A - Bearing mechanism of piping for separating supernatant water in sewage disposal plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve difficulty for machining O-ring grooves by making a bearing out of carbon material against a back metal part made of stainless steel material. SOLUTION: A back metal 2A made of stainless steel material is fixedly secured to a flange 2k, the back metal 2A is worked into a cylinder 2a in the axial direction, and one end of the cylinder 2a is formed into a flange 2b. A bearing material 2B made of a carbon material, synthetic resin material, or alloy of easy machinability is fitted in the cylinder 2a, a side plate 2C is fitted to the back metal 2A by screws 2j so as to prevent the bearing material 2B from slipping out in the axial direction. 0-ring grooves 2e, 2g are cutting- worked on the bearing face end of the bearing material 2B. The inner diameter D of a land 2f formed between the O-ring groove 2e and the O-ring groove 2g is made larger than the inner diameter of the bearing face 2d of the bearing material 2B. A narrow groove such as O-ring groove can be worked, because of machining for the carbon material or synthetic resin material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing mechanism for a supernatant water separating pipe in a sewage treatment plant.

[0002]

2. Description of the Related Art FIG. 3 is a side sectional view of a conventional waste water storage tank. The water tank is divided into a water tank A and a water tank B with a wall 7 interposed therebetween. The water tank A and the water tank B are connected via a pipe 1, and the pipe 1 is rotatably supported by bearings 5 and 6 and is rotatable about its axis as indicated by an arrow h. The branch pipes 1C and 1D communicate with each other.

In the above facility, the wastewater stored in the water storage tank A causes the wastewater such as bacteria contained in the wastewater to be deposited in the water storage tank A by a process such as aeration by blowing air. During the process of precipitating the waste, the pipe inlet 1a
And 1b are placed above the water surface WL.

After the wastewater in the wastewater tank A is settled in this manner, the pipe 1 is electrically operated to rotate the pipe 1 at a very slow speed as indicated by an arrow h via the lever-1F.
The pipe inlets 1a and 1b are aligned with the water surface WL. As a result, the supernatant water in the water storage tank A flows in from the pipe inlets 1a and 1b, and flows out to the water storage tank B side through the branch pipes 1C and 1D, the pipe 1 and the pipe outlet 1c as shown by the arrow i.

That is, filth is settled in the water storage tank A, and the supernatant water is separated from the water storage tank A side to the water storage tank B side by utilizing the water level difference with the water storage tank B. It has become.

When the height of the water surface WL in the water storage tank A changes in the separation of the supernatant water as described above, the pipe 1 is operated as indicated by the arrow h by operating the lever-1F as described above in response to the change. The inlets 1a and 1b are adjusted so as to always coincide with the water surface WL. In addition, 1A
And 1B are flanges that connect the pipe 1.

The bearing 5 of the pipe 1 for separating such clear water also serves as a seal between the water tank A and the water tank B in the wall 7, and the flange 5a of the bearing 5 is screwed into the wall 7. I'm wearing it. The mechanism of the bearing 5 is as follows.

FIG. 4 is a side sectional view showing an enlarged cross section of the bearing 5 in FIG. Flange 5a
Bearing material 5B made of carbon material on back metal 5A integrated with
Is fitted. A plurality of O-ring grooves 5b and 5c are provided on the side of the pipe outlet 1c of the back metal 5A, and O-rings 5d and 5e are inserted into the grooves 5b and 5c to connect the pipe shaft support portion 1E and the bearing 5. We are doing a seal between them.

The back metal 5A is made of stainless steel. It is used in consideration of deterioration of the bearing material due to rust in a poor environment where the environment of use is a dirty water tank.

Further, the bearing material 5B is provided between the back metal 5A and the shaft supporting portion 1E instead of directly using the stainless material of the back metal 5A as the bearing material. 1E and back metal 5A
This is because if and are directly supported by the shafts, the compatibility of the two as bearings is not good. Incidentally, the bearing material 5B made of a carbon material has a good compatibility with the shaft support portion 1E made of a stainless material as a bearing.

[0011]

It is difficult to process the O-ring grooves 5b and 5c in the back metal 5A as described above. This is because it is difficult to process the O-ring grooves 5b and 5c, which are extremely narrow grooves, because the back metal 5A is a stainless steel material having resistance to processing.

According to the present invention, the O ring groove 5b,
It is an object of the present invention to provide a bearing mechanism for clear water separation piping for a wastewater treatment plant, which eliminates the processing difficulty of 5c.

[0013]

[Means for Solving the Problems] In a back metal (2A) made of a stainless material, a flange (2
The bearing material (2B) is inserted and fitted in the axial direction until the bearing material (2B) abuts the flange in the cylinder (2a) to which b) is fixed.

At one axial end of the bearing surface of the bearing material that axially supports the supernatant water separation pipe, a plurality of O-ring grooves are arranged in the axial direction so as to make one round in the circumferential direction of the bearing surface. This is to enable the seal between the outer diameter of the clear water separation pipe and the bearing material.

The inner diameter (D) of the land (2f) partitioning the O-ring grooves in the axial direction is larger than the inner diameter of the bearing surface. The shaft end of the bearing material opposite to the side where the flange is located is fixed to the back metal by a side plate (2C).

[0016]

1 is a side sectional view of a bearing 2 according to the present invention, which is an improvement of the conventional mechanism of FIG. In FIG. 1, the flange 2k corresponds to the flange 5a in FIG. Back metal 2A made of stainless steel is flange 2
It is fixed to k and the cylinder 2 is in the axial direction of the back metal 2A.
A is machined to form a flange 2b at one end of the cylinder 2a.

The cylinder 2a is fitted with a bearing material 2B made of a carbon material, a synthetic resin material or an alloy which can be easily cut, and the side plate 2C is screwed to the back metal 2A by a screw 2j so that the shaft of the bearing material 2B is screwed. Prevents slipping in the direction.

O-ring grooves 2e and 2g are cut on the shaft end of the bearing material 2B. The inner diameter D of the land 2f formed between the O-ring groove 2e and the O-ring groove 2g is larger than the inner diameter of the bearing surface 2d of the bearing material 2B.
The O-rings are not attached to the O-ring grooves 2e and 2g for convenience of illustration.

The operation of the above embodiment will be described below. As described in FIG. 3, in the water tank A, the pipe inlets 1a and 1b have the water surface WL during the process such as aeration.
It remains raised further upward, and the movement of the pipe 1 in the rotation direction is stopped.

Therefore, in this state, the shaft support 1E of the pipe 1 does not rotate and does not move at all. The O-rings (not shown) mounted in the O-ring grooves 2e and 2g prevent water leakage from the water storage tank A to the water storage tank B via the shaft support 1E and the bearing member 5B. ing.

In contrast to the above state, when the wastewater in the wastewater tank A is settled and the supernatant water in the water tank A is discharged to the water tank B side as described above, the pipe inlet 1a And 1b enter the operation of matching the water surface WL.

That is, in order to make the pipe inlets 1a and 1b coincide with the water surface WL, the pipe 1 is gently rotated as indicated by an arrow h, and the rotation thereof causes the shaft support 1E to slide and rotate with respect to the bearing member 2B. Will be done.

With respect to this sliding rotation, since the bearing material 2B is made of a carbon material or a material having good compatibility with the synthetic resin for the pipe shaft support portion 1E made of a stainless material,
The pipe 1 can rotate while being smoothly supported by the bearing member 2B. Further, the carbon material or the synthetic resin used for these bearing materials 2A can be used with good durability because it does not cause corrosion or rust even if it contacts the dirty water in the water tank A.

While the pipe 1 is rotating, the pipe 1 rotates with respect to the O-rings fitted in the O-ring grooves 2e and 2g, and the elastic force of the O-rings causes the shaft support 1 to rotate.
A seal is made between E and the bearing material 2B.

In the land 2f of the partition that separates the O-ring grooves 2e and 2f in the above sealing action, the water tank A is provided.
The water pressure is applied from the side toward the water tank B side. However, since the water pressure is only the water head up to the water surface WL in the water storage tank A, the land 2f is a cover integrated with the bearing material 2B.
Even if the material is a bon material, synthetic resin material, or bearing alloy having a small tensile strength, the land 2f is not damaged by the water pressure.

Further, since the inner diameter D of the land 2f becomes larger than the inner diameter of the bearing surface 2d and a radial gap exists between the land 2f and the shaft supporting portion 1E, the shaft supporting portion has a narrow axial width of the land 2f. The weight of 1E does not damage the land 2f.

Further, in the structure shown in FIG. 1, it is difficult to press fit and integrate the bearing material 2B of carbon, synthetic resin or alloy into the back metal 2A of stainless material. Therefore, in FIG. 1, the flange 2b of the back metal 2A and the side plate 2C prevent the bearing material 2B from coming off in the axial direction.

With respect to the above operation, the O-ring groove 2
Since the cutting of e and 2g is the cutting of the carbon material or the synthetic resin material as described above, the O-ring groove 2e,
A narrow groove such as 2g can be easily processed.

FIG. 2 shows another embodiment of the present invention with respect to FIG. 1 described above, and is a side sectional view of the bearing 3 as in FIG. In FIG. 2, back metal 3A and side plate 3
C is the same as the back metal 2A and the side plate 2C in FIG.

2 is different from FIG. 1 in that it is improved with respect to the O-ring grooves 2e and 2g of the bearing material 2B of FIG. That is, the configuration of the portion to which the O-rings 3f and 3g in FIG. 2 are attached is as follows.

In the bearing material 3B, the cylindrical portion 3e is cut without providing the land 2f for providing the O-ring grooves 2e and 2g as shown in FIG. 1, and the cylindrical portion 3e is axially moved to the cylindrical portion 3e as shown in the drawing. The O-ring 3f, the backup ring 4 and the O-ring 3g are sequentially mounted.

The operation in FIG. 2 is as follows. The operation of the pipe 1 is the same as in FIG. Further, the action of the bearing surface 3b pivotally supporting the rotation when the pipe 1 rotates is the same as in the case of FIG.

The O-ring 3f is attached to the groove portion formed by the wall surface 3d, the cylindrical portion 3e and the backup ring 4, and the O-ring 3g is attached to the groove portion formed by the backup ring 4, the cylindrical portion 3e and the side plate 3C. When mounted, the O-rings 3f and 3g are fixed to the bearing material 3B.

The O-rings 3f and 3g fixed to the bearing member 3B as described above seal between the bearing member 3B and the shaft support 1E of the pipe 1 in the same manner as in FIG. The well-known mass-produced and inexpensive parts used together with the O-ring in a general high-pressure seal are used as the backup ring 4 in FIG. 2 in the same role as the land 2f in FIG. .

The inner diameter of the backup ring 4 is elastic in the radial direction as is well known, and therefore the inner diameter of the land 2f in FIG. 1 must be larger than the inner diameter of the shaft supporting portion 2d. There is no. This is because the elasticity of the backup ring 4 allows the force applied from the shaft support 1E to escape.

As described above, in the present invention, the backup ring 2A or 3A made of a stainless material which is difficult to cut is used.
It is possible to select a bearing material 2B or 3B that is easy to cut, and the O-ring groove 2e, 2g or 3 is formed on the bearing material 2B or 3B that is easy to cut.
The e-part is integrated and the bearing material is fitted to the backup ring. As a result, the O-rings 2e and 2g into which the O-ring fits, or the O-rings 3f and 3g.
The cylindrical portion 3e into which g is fitted is easily processed.

[0037]

【The invention's effect】

Effect of claim 1; The bearing material 2B fitted into the backup ring 2A is configured to include the O-ring grooves 2e and 2g, and the bearing material 2B can be selected from a material that can be easily cut. , Bearing material that is easy to cut 2
The O ring grooves 2e and 2g can be easily processed into B.

Effect of claim 2; Similar to the case of claim 1, the bearing material 3B is easily cut into the O-ring 3f,
It becomes possible to easily process the cylindrical portion 3e into which 3g is fitted, and the complexity of processing the land 2f in claim 1 is no longer necessary. Compared to claim 1, the O-ring 3f,
It is intended to further facilitate the cutting work of the portion to which 3 g is attached.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a bearing mechanism of a clear water separation pipe of a sewage treatment plant according to the present invention.

FIG. 2 is a side sectional view showing a bearing mechanism of a supernatant water separating pipe according to another embodiment of the present invention.

FIG. 3 is a side sectional view showing a conventional wastewater treatment tank.

FIG. 4 is a cross-sectional view of the bearing 5 shown in FIG.

[Explanation of symbols]

1 pipe, 1E shaft support, 2, 3 bearings, 2A,
3A Back metal, 2B, 3B Bearing material, 2C, 3
C side plate, 2a, 3a cylinder part, 2b, 3k
Flange, 2e, 2i O-ring groove, 2d, 3b
Bearing surface, 2f land, 3e cylindrical part, 3f, 3g
O-ring, 4 backup ring.

Claims (2)

[Claims] 1. A back metal (2A) made of a stainless steel material, wherein a cylinder (2a) having a flange (2b) fixed at one axial end thereof is provided with a bearing material (2B) in the axial direction until the bearing material (2B) contacts the flange. At the axial end of the bearing surface (2d) of the bearing material that is inserted and fits and pivotally supports the clear water separation piping (1), the outer diameter of the clear water separation piping and the bearing material are In order to enable sealing, a plurality of O-ring grooves that make one round in the circumferential direction of the bearing surface are arranged in the axial direction, and the inner diameter (D) of the land (2f) that partitions the O-ring grooves in the axial direction. Is larger than the inner diameter of the bearing surface, and the shaft end of the bearing material opposite to the side where the flange is located is fixed to the back metal by a side plate (2C). Bearing mechanism for piping. 2. A back metal (3A) made of a stainless steel material, wherein a cylinder (3a) having a flange (3k) fixed at one axial end thereof is provided with a bearing material (3B) in the axial direction until the bearing material (3B) contacts the flange. At the axial end of the bearing surface (3b) of the bearing material that is inserted and fits and pivotally supports the clear water separation pipe (1), the inner diameter of the bearing surface is set to be larger than the inner diameter of the bearing surface. A cylindrical portion (3e) having the same shaft center as that of the above, and the cylindrical portion is provided with O-rings (3f, 3g) and backup rings (4) alternately in this axial direction from the side of the bearing surface, A bearing mechanism of a clear water separation pipe for a wastewater treatment plant, wherein a shaft end of the bearing material opposite to the side where the flange is located is fixed to the back metal by a side plate (2C).