JP2001079575A - Mounting structure of rod-like sensor, sewage septic tank and method for mounting rod-like sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach a rod-like sensor by annexing a hollow bracket to a supporting member, annexing a hooking part to the upper part of the rod-like sensor and constituting the mounting structure in such a manner that the hooking part is detained at the top end of the hollow bracket when the rod-like sensor is inserted into the hollow bracket from above. SOLUTION: When the rod-like sensor 4 is erected and mounted to the supporting member 9 within a sewage septic tank for treating the combined waste water of night soil and miscellaneous domestic waste water, the hollow bracket 8 is annexed to the supporting member 9 and the hooking part 10 is annexed to the upper part of the rod-like sensor 4. When the detecting part 7 at the front end of the rod-like sensor 4 is successively lowered from the top end of the hollow bracket 8, the hooking part 10 comes into contact with the top end 11 of the hollow bracket 8 and the rod-like sensor 4 is detained and held. When the rod-like sensor 4 is taken out of the hollow bracket 8, the hooking part 10 is merely necessitated to be pulled up by holding its upper part. Since the attachment and detachment of the rod-like sensor 4 to and from the hollow bracket 8 are simplified according to such constitution, the maintenance and inspection of the rod-like sensor 4 are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a rod-shaped sensor provided in a sewage purification tank for treating combined wastewater such as human waste and domestic wastewater discharged from homes and the like, a sewage purification tank and a method of mounting the rod-shaped sensor.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a mounting structure of a conventional bar sensor provided in a sewage treatment tank. FIG. 4 is a schematic cross-sectional view of a sewage purification tank equipped with a rod-shaped sensor, and FIG.
FIG. 5 is an enlarged perspective view of a rod-shaped sensor mounting portion in FIG. 4. The sewage purification tank 1 has a manhole 2 at an upper portion thereof, and the manhole 2 is provided with a manhole cover 3. When inspecting the inside of the sewage purification tank 1, the manhole cover 3 is removed. In the sewage purification tank 1, a rod-shaped sensor 4 such as a pH sensor, a DO (dissolved oxygen) sensor, and a liquid level sensor having a detection unit 7 at a lower end is provided in a substantially vertical direction. The rod-shaped sensor 4 is fixed with U-bolts 6 at two positions above and below an angle stay 5 provided in the sewage purification tank 1.

The angle stay 5 is provided above the water surface, the bar-shaped sensor 4 is provided upright, and the detection section 7 is provided.
Is provided below the surface of the water.

[0004]

The rod-shaped sensor requires operations such as replenishment and replacement of the electrolyte in the detection unit periodically or as needed, and cleaning of the detection unit. Such a work is performed by loosening the U bolt and pulling up the rod-shaped sensor until the lower end thereof is above the liquid level. At this time, the rod-shaped sensor is dropped downward, the nut is dropped, and in some cases, the U-shaped sensor is dropped. There was a problem that the bolts and nuts were corroded and could not be loosened.

[0005] The present invention is intended to solve such a problem, and when performing maintenance and inspection of a rod-shaped sensor,
It is an object of the present invention to provide a mounting structure of a rod-shaped sensor that does not cause the rod-shaped sensor or nut to fall off and that can be detached even if the U-bolt or nut is corroded.

[0006]

SUMMARY OF THE INVENTION The present invention relates to the following structure for mounting a rod-shaped sensor, a sewage treatment tank, and a method for mounting a rod-shaped sensor. (1) A mounting structure of a rod-shaped sensor for fixing the rod-shaped sensor 4 on a support member 9 in the sewage purification tank 1, wherein the support member 9 is provided with a hollow receiver 8 for receiving the rod-shaped sensor 4. The bar-shaped sensor 4 has a hook portion 10 attached to the upper portion thereof. When the bar-shaped sensor 4 is inserted into the hollow receiver 8 from above, the hook portion 10 is moved to the upper end 11 of the hollow receiver 8. A rod-shaped sensor mounting structure that is locked by (2) A sewage purification tank having the mounting structure according to (1). (3) A method of attaching a rod-shaped sensor to the support member 9 in the sewage purification tank 1 by mounting the rod-shaped sensor 4 on the support member 9, wherein the support member 9 is provided with a hollow receiver 8. A method of mounting a rod-shaped sensor, wherein a hook portion 10 is attached to the upper portion, the rod-shaped sensor 4 is inserted into the hollow receiver 8 from above, and the hook portion 10 is hooked on the upper end portion 11 of the hollow receiver 8.

[0007]

The rod-shaped sensor 4 is mounted on the hollow receiver 8 from above.
Is inserted, the hook portion 10 hits the upper end portion 11 of the hollow receiver 8 and is held there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view of a rod-shaped sensor mounting structure according to an embodiment of the present invention. Bar sensor 4
Is fixed upright on a support member 9 provided in the sewage purification tank. The support member 9 is provided with a hollow receiver 8 for receiving and fixing the rod-shaped sensor 4. The bar-shaped sensor 4 is provided with a hook portion 10 at its upper portion. When the bar-shaped sensor 4 is inserted into the hollow receiver 8 from above, the hook portion 10 hits the upper end portion 11 of the hollow receiver 8. Locked at the site. Thereby, the rod-shaped sensor 4 is fixed to the support member 9 provided in the sewage purification tank 1 via the hollow receiver 8. The support member 9 is provided above the water surface in the sewage purification tank 1 and fixed to an inner wall or a partition wall of the main body of the sewage purification tank 1.

The support member 9 may be provided exclusively for fixing the rod-shaped sensor 4, or may be provided in common with a member used for other purposes. The support member 9 can be formed by combining a plate material such as a flat band or an L-shape or a member such as a tube or a bar. In this combination, the bolt,
A method such as fixing with a nut or the like, fixing with adhesion, fixing with welding, or the like can be used. Examples of the material of the support member 9 include a synthetic resin and a metal.

The hollow receiver 8 has a cylindrical shape having a circular, elliptical, triangular, quadrangular, polygonal, etc. cross-section when erected according to the shape of the body of the rod-shaped sensor 4. From the viewpoint of being able to be used and being closely fixed to the support member 9, a circular or square shape is preferable. The internal size of the hollow receiver 8 may be a size that allows the rod-shaped sensor 4 to pass through, and is preferably a size that does not allow the inserted rod-shaped sensor 4 to rattle in the lateral direction. Hollow holder 8
Has a length of 10 to 70%, preferably 15 to 50% of the length of the rod-shaped sensor 4. The rod-shaped sensor 4 can be stably held by setting the length of the hollow receiver 8 to this range. The hollow receiver 8 may be provided with a hole or a hole having a circular shape, an elliptical shape, a triangular shape, a square shape, a polygonal shape, or the like on a wall portion of the hollow receiver 8 itself.

As the material of the hollow receiving member 8, a synthetic resin or a metal can be used, and a synthetic resin is preferable from the viewpoints of corrosiveness and handleability. The hollow receiver 8 may be fixed to a support member 9 provided in the sewage purification tank 1 by a fixing tool 12 using a U-bolt and a nut, or may be fixed by bonding or welding.

The rod-shaped sensor 4 generally has a cylindrical or rod-shaped body, and a detection unit 7 provided at the tip of the body.
It consists of a lead wire 13 provided at the other end. Such a rod-shaped sensor 4 includes a pH sensor, a DO sensor,
And a liquid level sensor. The body of the rod-shaped sensor 4 is
Usually, it is made of synthetic resin, metal or glass.

A hook 10 is provided above the body of the rod-shaped sensor 4. The hook portion 10 may be formed integrally with the body portion, or may be fixed to the body portion later by bonding, welding, or screwing. The hook portion 10 may be provided with a flange as shown in FIG. 1 over the entire circumference of the body portion, or may be provided on a part thereof. In short, it is only necessary that the rod-shaped sensor 4 can be hooked on the upper end portion 11 of the hollow receiver 8 by the hook portion 10 and hooked and locked. Examples of the material of the hook portion 10 include a synthetic resin and a metal.

When the detector 7 at the tip of the rod-shaped sensor 4 is lowered from the upper end of the hollow receiver 8, the bar-shaped sensor 4 is locked and held when the hook 10 contacts the upper end 11 of the hollow receiver 8. You. When removing the rod-shaped sensor 4 from the hollow receiving member 8, it is sufficient to lift it by holding the hook portion 10 or the upper portion thereof. Therefore, since the rod-shaped sensor 4 can be easily attached to and detached from the hollow receiver 8, maintenance and inspection of the rod-shaped sensor 4 can be easily performed. Furthermore, the hook part 10
Is locked to the distal end portion 11 of the hollow receiver 8, so that pH and D
In the measurement of O, measurement at a fixed position is always possible.

FIG. 2 is a schematic sectional view showing one embodiment of a sewage purifying tank having a mounting structure for the bar-shaped sensor 4 shown in FIG.

The sewage purification tank 1 is provided with a screen 15, a flow control tank 16, an aeration tank 17, a sedimentation tank 18, a filtration tank 19, a disinfection tank 20, and a sludge storage tank 21 from the side into which sewage flows. ing. The screen 15 is for removing coarse solids in wastewater. Flow control tank 16
Is a tank for receiving the sewage passing through the screen 15 and transferring the sewage at a constant flow rate to the aeration tank 17, and is provided with a raw water pump 22. The sewage pumped from the raw water pump 22 is distributed by a distribution meter 23 disposed above the flow rate adjustment tank 16, and a fixed amount is transferred to the aeration tank 17.

The aeration tank 17 is a tank in which activated sludge is present and aerobic to decompose organic substances in the wastewater. Usually, an aeration member 24 is provided, and air sent from a blower 25 is discharged. The sedimentation tank 18 is a tank for sedimenting and separating the activated sludge and taking out supernatant water. The precipitated activated sludge is returned to the aeration tank 17 by an air lift pump 26, and the supernatant water is transferred to a filtration tank 19.

The filtration tank 19 is provided with an SS contained in the supernatant water.
This is a tank that captures and removes (suspended suspended solids) and decomposes residual organic matter by the action of biofilm filtration. An air diffusion member 28 is arranged in the filtration tank 19 to make the filtration layer 27 aerobic. Further, a diffuser member for washing the filtration layer 27, a pump for extracting the separated sludge, and the like (not shown) may be provided. The disinfection tank 20 is a tank for disinfecting and discharging the treated water treated in the filtration tank 19. The sludge storage tank 21 is a tank for storing excess activated sludge, and a part of the activated sludge settled in the settling tank 18 is transferred (illustration of a pipe to be transferred is omitted).

The operation of electric equipment such as the raw water pump 22, the blower 25 and the rod-shaped sensor 4 is normally controlled by a controller provided in the controller 14.

FIG. 3 is a schematic sectional view taken along the line AA in FIG. The aeration tank 17 has a diffusing member 24 and a support member 9.
Is attached. The support member 9 is usually provided above the water surface, and is fixed to the inner wall of the tank. Two cylindrical hollow receivers 8 are fixed to the support member 9 in substantially vertical directions by U-bolt fixing members 12. In this hollow receiver 8,
The rod-shaped sensor 4 is inserted and held. Bar sensor 4
Is held by hooking a hook portion 10 on an upper end of a hollow receiver 8, and a detecting portion 7 is provided at a lower end portion of the rod-shaped sensor 4, and is usually arranged below the water surface. Bar sensor 4
Are connected to the controller 14. In addition, sewage septic tank 1
A manhole 2 used for inspection and the like in the tank and a manhole cover 3 for closing the manhole are provided on the upper part of the tank.

In the aeration tank 17, for example, a pH sensor or DO
A rod-shaped sensor 4 such as a sensor is used. These rod-shaped sensors 4 are used to know the pH and DO state of the aeration tank 17 and to perform appropriate processing. The rod-shaped sensor 4 such as a pH sensor or a DO sensor can be provided not only in the aeration tank 17 but also in the flow rate adjustment tank 16, the sedimentation tank 18, the filtration tank 19, and the like.

The sewage treatment tank 1 is not limited to the configuration shown in FIG. For example, the flow control tank 16 may be replaced with a sedimentation separation tank, the aeration tank 17 may be replaced with an aeration tank containing a membrane separation device, or a submerged filter tank (contact aeration tank, biological filtration tank, etc.). When the sedimentation tank 18 is replaced with a submerged filter tank, the treatment tank may be replaced or removed.
The filtration tank 19 may be replaced with or excluded from the biological filtration tank. Furthermore, an anaerobic treatment tank such as a sedimentation separation tank or an anaerobic filter bed tank may be provided at a stage before or after the aerobic treatment tank such as the aeration tank 17. The rod-shaped sensor 4 includes an anaerobic treatment tank such as the above-described flow rate adjusting tank 16, a sedimentation separation tank and an anaerobic filter bed tank, an aeration tank 17, an aeration tank containing a membrane separation device, an immersion filter bed tank (contact aeration tank, (E.g., a filtration tank), an aerobic treatment tank, a filtration tank 19, and a treatment water tank.

The rod-shaped sensor 4 is mounted upright on the support member 9 in the sewage purification tank 1 in the manner described above. That is, the support member 9 provided in the sewage purification tank 1 is provided with the hollow receiving member 8, and the bar-shaped sensor 4 is provided with the hook portion 10 on the upper part thereof. Next, the rod-shaped sensor 4 is inserted into the hollow receiver 8 from above, and is lowered. As it is lowered, the hook 10 of the rod-shaped sensor 4
Are locked against the upper end 11 of the hollow receiver 8. Thus, the rod-shaped sensor 4 can be held by the hollow receiver 8. Since the rod-shaped sensor 4 has no portion directly fixed to the support member 9 or the hollow receiver 8, it can be easily attached and detached.

[0024]

According to the rod sensor mounting structure of the first aspect, the rod sensor can be easily attached and detached without dropping the rod sensor. Further, since the U-bolt fixing tool is not directly used for fixing the rod-shaped sensor, the rod-shaped sensor can be easily attached and detached. Thereby, the maintenance and inspection work of the rod-shaped sensor can be easily performed. According to the sewage purification tank of the second aspect, since the information of the bar-shaped sensor becomes more accurate, sewage treatment can be performed stably and favorably. According to the rod sensor mounting method of the third aspect, the rod sensor can be easily attached and detached without dropping the rod sensor. Further, since the U-bolt fixing tool is not directly used for fixing the rod-shaped sensor, the rod-shaped sensor can be easily attached and detached.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rod-shaped sensor mounting structure according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing one embodiment of a sewage purification tank having a rod-shaped sensor mounting structure.

FIG. 3 is a schematic sectional view taken along a plane AA in FIG. 2;

FIG. 4 is a schematic cross-sectional view of a sewage purification tank equipped with a conventional rod-shaped sensor.

FIG. 5 is an enlarged perspective view of a rod-shaped sensor mounting portion in FIG. 4;

[Explanation of symbols]

1. Sewage septic tank 2. Manhole 3. Manhole cover 4. 4. Bar-shaped sensor Angle stay 6. U bolt 7. Detection unit 8. Hollow receiver 9. Support member 10. Hook part
11. Upper end 12. Fixture 13. Lead wire 14. Controller
15. Screen 16. Flow control tank 17. Aeration tank 18. Settling tank
19. Filtration tank 20. Disinfection tank 21. Sludge storage tank 22. Raw water pump 23. Dispensing and measuring device 24. Air diffuser 25. Blower 26. Air lift pump 27. Filtration layer 28. Aeration member

Claims (3)

[Claims] 1. A mounting structure of a rod-shaped sensor for fixing a rod-shaped sensor on a support member in a sewage purification tank, wherein the support member is provided with a hollow receiver for receiving the rod-shaped sensor, and the rod-shaped sensor is A hook portion is provided on the upper portion thereof, and the hook portion is locked at an upper end portion of the hollow receiver when the rod-shaped sensor is inserted into the hollow receiver from above. . 2. A sewage treatment tank having the mounting structure according to claim 1. 3. A method for mounting a rod-shaped sensor, wherein the rod-shaped sensor is mounted on a support member in a sewage purification tank, wherein the support member is provided with a hollow receiver, and the rod-shaped sensor is hooked on an upper portion thereof. A rod-shaped sensor, wherein the rod-shaped sensor is inserted into the hollow receiver from above, and the hook portion is hooked to an upper end of the hollow receiver.