Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Reexamination Certificate
1999-02-23
2001-05-08
Stinson, Frankie L. (Department: 1746)
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
C134S103100, C134S16600C
Reexamination Certificate
active
06227215
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a piping cleaning device for cleaning the inside of the piping installed in building, residence, fountain, structure, etc., in a piping system intended for transferring liquids such as clean water, cooling water, solution, chemical solution, water liquid, liquid raw material, etc.
2. Description of the Prior Art
Conventionally, there exists, as device for cleaning piping, a device which cleans and removes dirt adhering to the inside of a piping by once storing at high pressure in an accumulator a cleaning solution stored in a tank, and then opening the valve to flow the cleaning solution stored in the accumulator at a stroke through the inside of the piping.
However, this device, which performs cleaning by flowing a cleaning solution from one end side to the other end side of the piping, requires continuous circulatory supply of a large amount of cleaning solution, and it is rather difficult to maintain a proper flow velocity and a pressure suitable for eliminating the dirt.
Moreover, another problem with this device is that, since the direction of flow of the cleaning solution is specified in one direction, the pressure and impact of the cleaning solution are applied from one direction only and not from the other direction and, for that reason, it is rather difficult to clean and remove obstinate dirt, making it necessary to repeat the operation of circulatory supply of cleaning solution many times in the case of presence of heavy dirt inside the piping, and taking a lot of labour and time for the cleaning of the entire piping.
Furthermore, in the case where a plural number of small pipes are installed on the piping, the transfer pressure of the cleaning solution flowing through the inside of the piping drops and the flow velocity and pressure of the cleaning solution change when the faucet provided at the discharge port of a small pipe is opened, and this makes it necessary to supply a still larger amount of cleaning solution at higher pressure, thus taking much time for the storage and pressurization of that cleaning solution and deteriorating the working efficiency.
On the other hand, still another problem is that, if either the discharge port or faucet of the small pipes is blocked, the fluid resistance inside the small pipes increases and the cleaning solution cannot be supplied to the terminal portion of the small pipes, thus making it impossible to remove dirt adhering to the inside of the small pipes.
SUMMARY OF THE INVENTION
The main objective of the present invention is to provide a piping cleaning device which can, by connecting a liquid storing tank, in which is stored a prescribed volume of cleaning solution, to one end side of the piping, connecting, to the other end side, a sealed tank for storing the cleaning solution discharged from that side and providing a liquid feed means for feeding a flow of cleaning solution between the two tanks through the inside of the piping, clean the piping by alternately repeating the action of feeding and flowing the cleaning solution to the liquid storing tank and the sealed tank through the inside of the piping to make the cleaning solution reach the entire areas of the piping up to the small pipes at the terminals, accurately clean and remove obstinate dirt adhering to the inside of the piping by applying the pressure and impact of the cleaning solution from different directions against the dirt adhering to the inside of the piping, promote improvement of working efficiency by making it possible to perform the cleaning work in a short time and efficiently and yet reduce the amount of cleaning solution to be supplied and thus reduce the amount of loss by feeding and recovering the cleaning solution from one end side of the piping, and is economical and capable of not only reducing the cleaning cost but also facilitating the installation work.
Another objective of the present invention is to provide a piping cleaning device which can, by connecting a sealed tank to the discharge port of the small pipes, temporarily store the cleaning solution discharged from the discharge port, accurately prevent the cleaning solution from splashing to the surrounding areas, and also accurately clean and eliminate dirt adhering to the inside of the piping.
Still another objective of the present invention is to provide a piping cleaning device which can, by constructing the liquid feed means with a pulsating feed means which pressurizes the cleaning solution when supplying it to the sealed tank and releasing the pressurization when recovering the solution to the liquid storing tank, repeat the action of pressure feeding the cleaning solution and the action of recovering the solution with release of pressurization, to make the cleaning solution pulsate and accurately clean and eliminate the dirt adhering to the inside of the piping with changes in flow velocity and pressure.
Yet another objective of the present invention is to provide a piping cleaning device which can, by constructing the liquid feed means with an reciprocating feed means, repeatedly apply pressure and impact to the cleaning solution from both the direction of feed and the direction of recovery to eliminate the dirt adhering to the inside of the piping.
A further objective of the present invention is to provide a piping cleaning device which can, by providing on the liquid feed means a switching means for switching the cleaning solution between a feed route and a recovery route, perform continuous operation without requiring stop and reverse turn of the liquid feed means, enable quick motion of feeding and recovering the cleaning solution, and thus improve the efficiency of cleaning work.
A still further objective of the present invention is to provide a piping cleaning device which can, by providing a means for applying ultrasonic vibrations to at least one of the cleaning solution and the piping, apply ultrasonic vibrations produced by the ultrasonic wave furnishing means to at least one of the cleaning solution and the piping, accurately separate obstinate dirt adhering to the inside of the piping with the synergism of pulsation or alternation of cleaning solution and ultrasonic vibrations, so as to accurately clean and eliminate even dirt sticking to corners and detailed parts inside the pipes and beautifully clean the inside of the piping, without being influenced by the size of pipe diameter and the situation of piping.
A yet further objective of the present invention is to provide a piping cleaning device which can, by providing a finishing liquid feed means for supplying finishing liquid, for washing away the residuals remaining inside the piping, to one end side of the piping, wash away the residuals remaining inside the piping with the finishing liquid, and finish and clean the inside of the piping into a clean and hygienic state.
Still another objective of the present invention is to provide a piping cleaning device which can, by sealing, in a sealed tank, a gas for discharging the cleaning solution stored in that tank, discharge the cleaning solution with the pressure of this gas, thus making it unnecessary, when discharging the liquid, to reverse the liquid feed means and suck the cleaning solution, shortening the time for recovery and reversing of flow, and enabling efficient execution of the cleaning work.
Yet another objective of the present invention is to provide a piping cleaning device which makes it possible, by constructing at least part of the tank in a way to enable visual check from outside of the cleaning solution in the tank, to visually control the degree of staining of the cleaning solution stored in the tank, easily grasp the state of cleaning inside the piping and, since the cleaning effect drops as the amount of foreign matters contained in the cleaning solution increases, accurately grasp the time for replacement of the cleaning solution by visually checking the degree of staining of the cleaning solution either at prescribed intervals or periodically, thus e
Kojima Moonray
Stinson Frankie L.
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