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Results and Utilization of Technology Development
Last updated on August 23, 2023.
City of Yokohama, Water Works Bureau conducts various research and research to sustain and develop water supply businesses and solve various issues.
As a result of this research, I would like to introduce those patented by Water Works Bureau and private companies.
If you would like to use these technologies and want to know more details, please contact the Water Works Bureau Asset Utilization Division (Tel: 045-671-3660).
Results and utilization of technology development
Mobile soundproof wall
Joint Applicant
Meiji Shoko Co., Ltd.
Corporate Number: 4010701009616
Date of application
H22.4.6
Date of patent acquisition
H25.11.15
Overview
It is used to reduce noise generated from cutting machines, installation equipment, etc. at construction sites such as road construction, construction related to water pipe renewal and repair.
(Characteristics and effects)
(1)The jabara-like caster gate is used for the frame, and it can be easily moved at the work site.
(2)Since the upper part is arched, it has the effect of reducing noise leakage to the outside.
(3)Especially, it is effective when working in places where the surrounding environment is quiet, such as nighttime construction.
Distribution pipes, distribution pipes with water taps and their burial methods
Joint Applicant
Kurimoto Ltd.
Corporate Number: 1120001048991
Date of application
H22.8.27
Date of patent acquisition
H26.4.11
Overview
It does not require drilling and installation work at the site when renewing or constructing a new water pipe, contributing to a reduction in construction costs.
(structure)
Epoxy resin powder coating is applied to the inner surface of the branch hole, and anticorrosion core is not required, and the outer surface coating is as high as GX.
(Characteristics of water supply branch short pipes)
（1） Improved corrosion resistance at the water supply pipe branch.
（2） No drilling or installation work is required.
（3） Responding to shallow filling of pipelines.
Inspection equipment for checking the installation status of rust-proof cores in perforation of water pipe branches from water pipes, etc.
Joint Applicant
MAEZAWA KYUSO INDUSTRIES Co., Ltd.
Corporate Number: 8013201005478
Date of application
H25.5.13
Date of patent acquisition
H26.8.8
Overview
This is an inspection device that allows you to visually check the condition of the adhesion core due to non-water interruption, and also considers workability and safety.
(Characteristics and effects)
(1)The condition of the adhesion core can be visually confirmed due to the absence of water supply.
(2)It can be used day and night because the light of LED lights is irradiated inside the water tap through a light conductive member.
(3)Since the LED light and the air removal mechanism are compact, the workability is good.
(4)Air can be safely discharged with simple operation.
(5)It can be used repeatedly.
Connection joints between a water meter and a tightening holder with a flange type on the primary side end.
Joint Applicant
MAEZAWA KYUSO INDUSTRIES Co., Ltd.
Corporate Number: 8013201005478
Date of application
H24.4.17
Date of patent acquisition
H26.12.12
Overview
This is a connection joint that improves the workability of connecting the water meter in the meter unit used for the flange type water meter.
(Characteristics and effects)
(1)There is no need for a dedicated joint that connects the water meter used in the conventional meter unit.
(2)It is possible to connect the water meter to the meter unit without using tools.
(3)The connection joint is designed to stop water using rubber packing.
(4)Equipped with a fall prevention structure when attaching a water meter with a connection joint to the meter unit.
Standpipe
Joint Applicant
KITAGAWA IRON WORKS Co., Ltd.
Corporate Number: 1160001008208
Date of application
H26.7.23
Date of patent acquisition
H27.3.13
Overview
Underground fire hydrants provided under the road surface, inlet outlets such as fire hydrants provided for fire trucks, etc., or stand pipes connected to air valves, support areas that are easily damaged or use strong materials, etc. Safety and durability have been improved.
How to renew pipelines and their pipelines
Joint Applicant
Taisei Machinery Co., Ltd.
Corporate Number: 1120001066556
Date of application
H25.8.28
Date of patent acquisition
H28.4.1
Overview
This is a new non-cutting communication method that enables cost reduction. The aging existing pipes will be installed and updated with seismic pipes at locations different from the existing pipes without interruption.
(Characteristics and effects)
（1） Two types of three-way switching valves are used in each process: the non-cutting valve and the new switching valve.
（2） Cost reduction can be achieved by removing the switching valve and reusing it.
（3） After removing the switching valve, it is possible to prevent corrosion of the pipe cut surface by installing a flow path guide (corrosion-proof body).
Dry Powder activated carbon injection facility and dry powder activated carbon injection
Joint Applicant
TSUKISHIMA KIKAI Co., Ltd.
Corporate Number: 8010001034856
Date of application
H26.8.11
Date of patent acquisition
H28.4.8
Overview
This system allows simultaneous and continuous automatic control of the dissolved concentration and injection amount of activated carbon slali in one series in a dry powder activated carbon injection facility.
(Characteristics and effects)
（1） In addition to controlling the injection flow of activated carbon slali, the melting concentration adjustment can also be controlled by a single series, so detailed injection rate control can be realized in a responsive manner.
（2） By equipping this system with a dry-type pulverizer, it is possible to generate and inject pulverized coal on-site, which greatly improves the maximum injection rate of commercial coal conversion.
（3） It has a crushing route and an unmilled route, and it is possible to switch between commercial and pulverized coal and pulverized coal, so it is possible to secure the minimum injection rate of commercial coal conversion. (Realization of a significant injection rate range)
Branch pipes
Joint Applicant
Kurimoto Ltd.
Corporate Number: 1120001048991
Date of application
H25.8.22
Date of patent acquisition
H29.5.26
Overview
When renewing or constructing a water pipe, connecting a water pipe with a water tap mechanism eliminates the need for drilling pipes and installing a water tap in the water pipe removal work, and contributes to reducing construction costs. .
Continuous epoxy resin powder coating from the inside of the pipe to the branch hole, and outer coating has long-term durability due to high corrosion-resistant coating similar to the GX type.
This invention is characterized by the addition of support legs for the purpose of stability at the time of installation, with a main pipe diameter of 75 x branch pipe diameter of 50.
Inspection method of laying pipes
Joint Applicant
Venture Academia Co., Ltd.
Corporate Number: 2020001042962
Date of application
H25.12.24
Date of patent acquisition
H30.2.9
Overview
Pipe in Pipe is a method of inserting an internal intubation (internal pipe) inside the existing pipe (outer pipe) buried underground, injecting cement gluut between the outer pipe and the inner pipe, and fixing both. If the injection of graut material is not homogeneous, it may not be possible to perform its function. If normal, the inner tube and the outer tube are not in contact, but if it is uneven, it is in contact. This is a method in which a rectangular wave current is applied between the inner and outer pipes, and the response is used to determine whether there is contact.
Pressure resistance test equipment for piping
Joint Applicant
San-esu Rubber Industries, Ltd.
Corporate Number: 4120001080034
Date of application
H26.5.14
Date of patent acquisition
H30.5.25
Overview
In this invention, the pressure resistance test equipment for piping is equipped with two packers connected by a flexible connection method and a fluid pressure supply method for pressure resistance test. There are multiple sled driving guides with multiple running rollers at both ends of each packer. Each packer has a cylindrical body and a swelling tube that is fitted to the outer periphery of the body and has both ends joined to the outer periphery. The swelling tube consists of a tube body, which is made of rubber elastic material, and a number of adjustment bands, which are made of non-stretchable material and inserted into the tube body.
Powder activated carbon injection facility and powder activated carbon injection method
Joint Applicant
TSUKISHIMA KIKAI Co., Ltd.
Corporate Number: 8010001034856
Date of application
H29.2.14
Date of patent acquisition
H30.6.8
Overview
This is an automatic control system that stably manufactures and injects pulverized pulverized pulverized coal with the target granularity even if the grain size of the commercially available dry coal (hereinafter referred to as raw coal) is different in the on-site pulverized activated carbon injection facility.
(Characteristics and effects)
（１） This system automatically adjusts the grinding energy in order to bring the pulverized carbon particle size closer to the target particle size based on the raw material charcoal particle size that is continuously measured based on the knowledge of the correlation between the activated carbon particle size ratio and the crushed energy before and after milling.
（２） When forming a milling path in which raw coal and pulverized coal are mixed, the amount of mixed activated carbon is automatically adjusted based on the mix ratio and adsorption performance difference.
（３） As mentioned above, even if the grain size of the raw charcoal purchased varies greatly, it is possible to manufacture and inject pulverized coal with a constant grain size (quality) at all times, thereby preventing excessive or inadequate use of activated carbon.
Water pressure test equipment
Source: Development of medium-diameter water pressure testers. Kurimoto Technique, 2019, 68, p.4.
Joint Applicant
San-esu Rubber Industries, Ltd.
Corporate Number: 4120001080034
Kurimoto Ltd.
Corporate Number: 1120001048991
Date of application
H28.8.23
Date of patent acquisition
R3.3.2
Overview
The water pressure test equipment in this invention can be easily and reliably verified by making it possible to pressurize the same water pressure as normal water flow to the joint joint junction of the newly established medium-diameter ductile iron pipe. The main invention is the structure and shape of a rubber stoppage and a special flange made of special materials.
Estimation and prediction of corrosion status of buried metal structures and measurement probes used for them
Example of Estimation Curve
Figure measurement
Joint Applicant
Venture Academia Co., Ltd.
Corporate Number: 2020001042962
Date of application
H29.10.12
Date of patent acquisition
R3.4.9
Overview
A device (CTS) that installs a metal body of the same material as the buried pipe near the buried pipe and continuously measures the amount of meat reduction using electrical signals. Calculate the estimated amount of meat reduction in buried pipes from the measured amount of meat reduction, and evaluate the remaining life of buried pipes. The figure shows that point X is judged to have no problem for more than 100 years, while at point Y, corrosion may reach the thickness of the pipe in about 60 years. Furthermore, the results of the analysis will help micro management determine when to update pipelines.
Installation method of strainer for removing foreign substances of tap water and construction method of tap water pipe
Joint Applicant
Interchemical Co., Ltd.
Corporate Number: 5010001151563
Date of application
H29.3.31
Date of patent acquisition
R3.12.7
Overview
In order to respond to inquiries such as `` foreign matter comes out '' from homes that use water supply after disconnection due to water supply work and homes that use aging water supply equipment, fine foreign matter can be removed while using water supply, and easily detachable We have developed and constructed a strainer that can be removed.
(１) It is possible to catch fine foreign matter (iron rust, rubber packing fragments, etc.)
(２) It is possible for customers to remove foreign substances while using water.
(３) Easy to remove
(４) Reduction of the amount of non-revenue water associated with water discharge cleaning and on-site response time for Water Works Bureau staff
(５) It is possible to determine whether the foreign matter is from the primary side of the water meter or from the secondary side.
Fluid Equipment Replacement Method and Equipment Replacement jig (Slide Repair Method)
Joint Applicant
Taisei Machinery Co., Ltd.
Corporate Number: 1120001066556
Date of application
R1.5.20
Date of patent acquisition
R5.5.23
Overview
This method is to repair a water tap with a saddle that has leaked without interruption.
The repair bracket is temporarily assembled adjacent to the water faucet with the saddle, slide with the water faucet with the saddle, and fasten the repair bracket with one bolt with the equipment replacement jig, stop the water, and repair the water leakage.
[Characteristics and Effects]
- It is possible to repair water leaks in water taps with water saddles in a short time.
- One-bolt type, speedy temporary water stoppage
- It can be constructed even if there is an existing core.
- Repair is possible without interruption of water distribution pipes
Replacement method of fluid equipment and equipment replacement jig (Saddle rotation method)
[Process]
(1)Use a temporary fixture to temporarily fix a water tap with a saddle.
(2)Replace the band with repair materials
(3)180° turn the water tap with saddle after removing the temporary fixation and replacing the band.
(4)Temporarily fix the rotated repair material and replace the saddle with repair material.
Joint Applicant
Taisei Machinery Co., Ltd.
Corporate Number: 1120001066556
Date of application
R1.5.20
Date of patent acquisition
R5.6.5
Overview
This method is to repair a water tap with a saddle that has leaked without interruption.
[Characteristics and Effects]
- It is possible to repair water leaks in water taps with water saddles in a short time.
- The finish after repair is compact
- Repair is possible without interruption of water distribution pipes
Inquiries to this page
Planning Division, Water Works Bureau Facility Department
Phone: 045-671-3061
Phone: 045-671-3061
Fax: 045-212-1158
E-Mail address [email protected]
Page ID: 101-669-189
