JP2000104329A - Short pipe provided with pig passing detector in sewage force conveying pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply connect a short pipe provided with a pig passing detector at a proper position of a sewage conveying pipe line, to confirm the passing of a pig visually by a pointer and, at the same time, to enable the shake-off of foreign matters entangled in a detection claw with hands. SOLUTION: A short pipe provided with a pig passing detector in a sewage conveying pipe line is a short pipe 1 having a joint connected to the sewage conveying pipe line, a protected pipe 3 is linked with the short pipe 1 to erect, and a rotary shaft 4 is inserted into the protected pipe 3 to form the upper part of the protected pipe 3 in an air tight state. A detection claw 7 is fixed to the lower end of the rotary shaft 4 and is projected in the inside of the short pipe 1, a pointer 8 is mounted to an upper projection of the rotary shaft 4, and indicators 10a and 10b for indicating the rotation of the pointer 8 are provided downward thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short pipe with a pig passage detector which is connected to a portion of a sewage pressure feeding line at a position where the pig is to be checked. In order to maintain and manage the pipes, the pigs are run periodically in the pipeline to remove deposits and the like in the pipeline, but the passage of the pig at this time is detected by the rotation of the pointer. The present invention relates to a short pipe with a pig passage detector on a road.

[0002]

2. Description of the Related Art Conventionally, various foreign substances have flowed into a sewage pressure pipeline installed between a sewage treatment plant and a sewage treatment plant or between a sewage treatment plant and a terminal sewage treatment plant and accumulated on the inner peripheral surface. There is a problem in that the substance adheres and the flow in the pipe is obstructed to cause a decrease in the flow rate, or the gas stays in the pipe to deteriorate the odor and the flow of the sewage. Therefore, by periodically moving the pig made of foamed resin in the pipeline with the discharge pressure of the pressure feed pump to prevent the accumulation of sediment in the pipeline and the growth of slime, the gas and air are discharged. It is practiced to always keep the sewage pressure line clean.

In the operation of inserting the pig, it is necessary to check the progress of the pig emitted from the launching device to the main pipe, the passing status of the pig in the middle of the pipeline, whether the pig has arrived at the collecting device, and the like. If a problem occurs in one pig and the vehicle stops in a pipeline, a stop detection device can be used to identify the stop location and help search. Therefore, the pig passage detection device is indispensable in the sewage pressure pipeline.
This is a very important device that allows the maintenance manager of the sewage pressure pipeline to carry out the insertion work with peace of mind.

[0004] Since the sewage line is connected for a short one and several kilometers and for a long one for several tens of kilometers, a passage detecting device is appropriately installed at a place where it is desired to confirm the passage of a pig in the middle of the sewage line. Has been installed. As the passage detecting device, the present applicant has proposed and obtained a favorable reputation.
As described in Japanese Patent No. 23829, when a pig hits a detection claw protruding into a pipeline, a rotary shaft rotates, and a limit plate integrally fixed to the rotary shaft rotates, whereby a limit switch is turned on. There is an electric detection device that detects the passage by operating.

As another example, when a pig hits a plunger protruding into a pipeline, the plunger is pushed up, a lever supporting the flag in a horizontal state is released, and the flag stands up by its own weight. And there is a mechanical detection device that senses the passage by looking at the flag.

[0006]

The former electric passage detection device, when confirming the passage of a pig many times in a short period of time, such as an oil pipeline, confirms each time visually. Even if it is suitable because it is not necessary, it is not suitable to be used for detection about once every several months like a sewage pressure pipeline. Further, the electric detection device cannot be visually confirmed because the limit plate is returned to the original state by the pulling-back force of the spring when the limit switch is operated. Furthermore, even if a foreign substance is entangled with the detection claw, the detection claw cannot be shaken off, and the rotating shaft may not rotate smoothly. In addition, there has been a problem that the elasticity of the spring is weakened during use for a long period of time, and accurate detection cannot be performed.

[0007] If it is intended to visually check the passage, a warning light may be turned on by operating a limit switch to check the passage. However, the passage of a sewage pressure supply line or the passage of a pig is detected. It is very difficult to bring in or pull in the power supply to the place where the device is installed, and there has been a problem that the management thereof increases the cost.

In addition, the latter mechanical passage detection device employs a plunger mechanism, which complicates the mechanism and causes many failures, and inorganic and organic sludge and hair accompanying factory drainage and domestic drainage. Sewage containing fiber waste flows through the pipeline, and especially hair and fiber waste flow into the pipeline even after the treatment process. There was a problem that caused trouble.

Further, in both cases of the electric and mechanical passage detection devices, they must be directly attached to the sewage pressure feed pipe by welding or the like. Sometimes I couldn't.

Since the sewage pipeline supports the local community, if it stops, the function of social life will stop and cause great confusion. Therefore, the detector to be installed is maintenance-free and does not break down. Even if there is, something that can be fixed without easily removing it from the outside is required,
The two-pass detection devices described above did not always satisfy these requirements.

SUMMARY OF THE INVENTION The present invention has been developed to solve the above problems, and can be easily connected to an appropriate position of a sewage pumping line, and can confirm passage of a pig visually with a pointer. It is another object of the present invention to provide a short pipe with a pig passage detector in a sewage pressure feed line which has an advantage that a foreign substance entangled in a detection claw can be manually shaken off.

[0012]

As a means for solving the above-mentioned problems and achieving the object, the present invention provides a short pipe having a connection port connected to a sewage pressure pipeline, wherein the short pipe has The protection tube is erected by communicating with the protection tube, a rotation shaft is inserted into the protection tube to make the upper portion of the protection tube airtight, and a detection claw is fixed to the lower end of the rotation shaft to protrude into the short tube. A short pipe with a pig passage detector in a sewage pressure feed line was constructed and provided with a pointer attached to the upper protruding part of the rotating shaft and a display section indicating the rotation of the pointer below the pointer.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 in the accompanying drawings. Reference numeral 1 denotes flanges 1a at both ends connected in the middle of a sewage pressure pipeline. , 1
a short pipe of stainless steel having a
The hole 2 is formed at a position of a circular arc at an angle of 45 degrees from.

Reference numeral 3 denotes a cylindrical stainless steel protection tube having one side surface vertical and the other side bulging outwardly from the lower end to the center, and formed to be wider from the lower end to the center. Therefore, even if a foreign substance or the like is mixed in, it can be easily taken out. The lower end of the protective tube 3 is fitted in the hole 2 and the fitting portion is welded and vertically erected, and the upper end is airtight as described later.

Reference numeral 4 denotes a rotating shaft inserted into the protective tube 3, which is rotated forward and reverse by bearings 5 and 5 provided on the upper and lower portions of the rotating shaft 4. A sleeve 6 made of stainless steel is fitted.

Numeral 7 denotes a detection claw, which is welded and fixed to the lower end of the rotary shaft 4 and has a tip protruding into the short tube 1. A pointer 8 having a thin mounting base and a thick mounting base is mounted with a nut 9. The pointer 8 may be colored to stand out.

Reference numeral 10 denotes an upper flange fixedly integrated with the upper part of the sleeve 6 by welding. A display part 10a of a SET position is provided on the surface of the upper part of the upper part of the sleeve 6 so as to indicate a rotation position of the pointer 8, and a display part 10a is provided on both sides. PASU position display unit 10b, 10
b are displayed respectively.

Reference numeral 11 denotes a lower flange fixedly integrated with the upper portion of the protection tube 3 by welding. A packing 12 is interposed between the lower flange 11 and the upper flange 10, and bolts 13 for connecting the upper flange 10 and the lower flange 11 are provided. The above-mentioned protection tube 3 is attached in an air-tight state by tightening and joining. 14 is an O-ring.

The short pipe with the pig passage detector in the sewage pressure feed line of the present invention configured as described above is connected to a portion where the pig is to be confirmed to pass, for example, an outlet of a bent portion. That is, the flanges 1a and 1a on both sides of the short pipe 1 with the pig passage detector can be easily attached on site by abutting the flanges of the sewage pressure feed pipe and bolting. The vessel is installed and can be easily attached.

Next, the operation of the detector will be described. The pig fired from the firing device by the pump pressure travels in the pipeline. When the short pipe 1 comes to the place where the short pipe 1 is connected, the pig hits the detection claw 7 and the rotating shaft 4 rotates, and accordingly, the pointer 8 is applied to the surface of the upper flange 10 from the central SET position 10a and the PASS in the traveling direction. Rotate towards position 10b, approximately 9
The pointer 8 stops at the position of 0 degrees. Looking at the state of the pointer 8, the passage of the pig can be confirmed. After the passage is confirmed, the pointer 8 may be returned to the original SET position 10a for the next detection.

FIGS. 6 and 7 show a second embodiment of the present invention. The difference from the first embodiment is that the pointer 8 is fixed to the pointer mounting plate I5. And display portions 10a, 10a on the surface of the upper flange 10.
b, a large semi-circular display plate 16 provided with a 10b is attached.

That is, a rectangular pointer mounting plate I5 is attached to the upper end of the rotary shaft 4 by a nut 9, and a relatively long and high pointer 8 is integrally fixed to the pointer mounting plate I5. On the surface of the upper flange 10, a display plate 16 indicating the rotation of a pointer 8 made of a large semicircular stainless steel plate having a center SET position 10a and display portions indicating PASS positions 10b on both sides is attached. Only the points described above do not differ from the first embodiment in other structures, functions, and effects. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals.

In the first and second embodiments, the case where the short pipe 1 with the pig passage detector is connected in the middle of the sewage pressure feed line has been described.
a and 1a, but, for example, when it is attached to the pig launching device 17 or the pig collecting device 18 shown in FIG. 4 and FIG. 5, it has a flange 1a at one end and launches at the other end. Short pipe 1 configured to be directly welded to equipment and recovery equipment
Is used.

Thus, the launching side can confirm the progress of the pig to the main pipe, the recovery side can quickly recognize the arrival, and the toxic gas such as hydrogen sulfide generated in the pipe along with the cleaning of the sewage feed pipe. When is discharged, it is possible to check the arrival from the outside without opening the collection device and to perform work, thereby protecting the safety of workers. And
If the arrival of the pig is confirmed by the pointer, safety can be ensured by replacing the toxic gas with a safe gas in advance at the time of removal.

Although the embodiments of the main embodiment of the present invention have been described above, the present invention is not limited to these embodiments, but can achieve the object of the invention and provide the gist of the present invention. It goes without saying that various design changes can be made without departing from the scope of the present invention.

[0026]

As described above, the short pipe with the pig passage detector in the sewage pumping line of the present invention is a short pipe having a connection port connected to the sewage pumping line, and is protected by the short pipe. The pipe is connected to stand upright, a rotary shaft is inserted into the protective tube to make the upper part of the protective tube airtight, and a detection claw is fixed to the lower end of the rotary shaft to protrude into the short pipe. In addition, since the pointer is attached to the upper protruding portion of the rotating shaft and a display portion for indicating the rotation of the pointer is provided below the pointer, the following excellent effects can be exhibited.

Since the pointer rotates with the rotation of the rotating shaft, there is no rotation error, and the pig passage detector itself has an extremely simple structure, so that it can be used for a long period without failure and can be provided at low cost. it can.

Since the rotation and the stop position of the hands can be visually checked, the passage or non-passage of the pig can be reliably detected, and since the hands are rotated above the display section, the hands are not rotated. In addition to being clearer, the rotation of the pointer can be recognized simply by opening the lid where the pig passage detector is installed.

In addition, the connection can be made at an appropriate position where the passage of the pig is desired to be confirmed in the middle of the sewage pressure pipe, and the connection can be easily made on site, so that the connection work time can be shortened, the work efficiency can be improved, and The pig passage detector works just by connecting the short pipe.

Further, when the foreign matter is entangled with the detection claw, if the pointer is rotated, the rotating shaft can be rotated to release the entangled foreign matter, and the rotation of the rotating shaft becomes smooth.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a partially omitted plan view showing the first embodiment of the present invention.

FIG. 3 is a side view showing the first embodiment of the present invention.

FIG. 4 is a side view in which the short tube with a pig passage detector of the present invention is connected to a firing device.

FIG. 5 is a side view in which the short pipe with a pig passage detector of the present invention is connected to a collecting device.

FIG. 6 is a partially omitted longitudinal sectional view showing a second embodiment of the present invention.

FIG. 7 is a plan view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Short tube with pig passage detector 3 Protective tube 4 Rotation axis 7 Detection claw 8 Pointer 10a Display unit 10b Display unit

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[Procedure amendment]

[Submission date] November 9, 1998 (1998.11.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

FIGS. 6 and 7 show a second embodiment of the present invention. The difference from the first embodiment is that the pointer 8 is fixed to the pointer mounting plate 15. And display portions 10a, 10a on the surface of the upper flange 10.
b, a large semi-circular display plate 16 provided with a 10b is attached.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

[0022] That is, Yes rectangular pointer attachment plate 1 5 to the upper end of the rotary shaft 4 is attached by a nut 9, a relatively long and high pointer 8 to the pointer attachment plate 1 5 is fixed integrally A display plate 16 indicating the rotation of the pointer 8 made of a large semicircular stainless steel plate having a dot, a center SET position 10a on the surface of the upper flange 10, and a display portion indicating the PASS position 10b on both sides. Only at the point of attachment, there is no difference between the first embodiment and other structures, functions and effects. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals.

Claims (1)

[Claims] Claims: 1. A short pipe having a connection port connected to a sewage pressure feed pipe line, wherein the short pipe is erected by connecting a protection pipe to the short pipe.
A rotary shaft is inserted into the protective tube to make the upper portion of the protective tube airtight, and a detection claw is fixed to the lower end of the rotary shaft to project into the short tube. A short pipe with a pig passage detector in a sewage pressure feed line, which is provided with a pointer attached to the bottom of the pipe and a display section indicating rotation of the pointer below the pointer.