JP2003155768A - Urolith adhesion preventing method for flush toilet urinal facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of accurately keeping the pH suitable for preventing adhesion of urolith. SOLUTION: This method for preventing adhesion of urolith of a flush toilet urinal facility is a method for preventing adhesion of urolith in the flush toilet urinal facility using a chemical solution injecting device for the flush toilet urinal fitted to a water supply pipe to the urinal. In the chemical solution injecting device for the flush toilet urinal, a chemical solution with a designated concentration is quantitatively injected at a designated ratio to the quantity of water for one washing, thereby keeping the pH of the mixed waste water of urine, washing water and a chemical solution under 5.0.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing urine stones from adhering to a flush urinal.

[0002]

2. Description of the Related Art In recent years, flush urinals have been equipped with an injection device configured to supply a chemical for flush urinals for the purpose of preventing adherence of urinary stones, disinfection, deodorization, etc. Is increasing. In the injection device, the medicine to be used is generally a solid medicine, and as shown in FIG. 9, the solid medicine 110 is stored in a perforated container 111 and a urinal.
The water flow branched from the wash water pipe 130 to the float valve 120
It is introduced into the dissolution tank 150 via 140 and dissolved, and the dissolution liquid is injected or supplied at the end of the washing water to the urinal 120 to prevent adhesion of urine stones etc. to the urinal 120. It is configured. Such an injection device includes a human body sensor 160, detects that the human body is separated after using the urinal, and opens a solenoid valve 180 for a predetermined time by the control circuit 170 to supply flush water to the urinal. It is configured. In the case of an injection device using such a solid medicine, in order to accurately control the injection amount, JP-A-3-59326, JP-A-3-66842, and JP-A-2-2257 are used.
Various devices have been proposed in Japanese Unexamined Patent Application Publication No. 33-33, JP-A-2001-090144, and the like. However, these devices also have various problems because they use a solid drug. As a condition for elution of the solid chemical in water, there is a problem that the chemical concentration of the eluted cleaning water tends to vary depending on seed conditions such as water temperature, ambient temperature and aging. Therefore, p of the mixed solution of urine, wash water, and chemical solution
It was difficult to keep H at the desired value.

[0003]

The pH of the mixed solution is 5.0.
If it is less than the above range, urinary stones are hard to adhere, but it is difficult to control the pH by the injection method using a solid drug. If the pH is extremely lowered, the toilet equipment will be corroded, so it is necessary to prevent it from falling too low.On the other hand, if the pH is too high, urine stones tend to adhere and cleaning management of the toilet equipment becomes complicated, so the pH is too high. You also need to prevent it. Under such circumstances, it has become necessary to accurately and accurately inject the drug solution. Therefore, the present invention is suitable for preventing the attachment of urinary stones.
The purpose is to provide a method capable of maintaining H accurately.

[0004]

A method for preventing urinary cough adhesion of flush urinal equipment according to claim 1 is a method of flush flush urinal equipment using a chemical solution injection device for flush urinal attached to a water supply pipe to the urinal. In the method for preventing adherence of urinary stones, in the above-mentioned flush type urinal drug solution injecting device, urine, washing water, and a medicinal solution are obtained by quantitatively injecting a medicinal solution having a predetermined concentration at a predetermined ratio with respect to the amount of washing water at one time. PH of mixed wastewater of 3.5 ~
It is characterized in that it is maintained below 5.0. Claim 2
The method for preventing adherence to urinary cough of the flush urinal facility is characterized in that when injecting a drug solution of a predetermined concentration, a constant flow pump is used to inject a fixed amount of the drug solution of a predetermined concentration. The method for preventing urinary cough adhesion of flush urinal equipment according to claim 3 is characterized in that, when injecting a drug solution of a predetermined concentration, a fixed amount of the drug solution of a predetermined concentration is injected using a plunger type constant flow pump. There is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A drug solution injector for a flush urinal used in the method for preventing urinary cough adhesion of flush urinal equipment of the present invention will be described with reference to the drawings. FIG. 1 is a basic structural diagram of an example of a flush type urinal drug solution injector for use in the present invention.

In FIG. 1, reference numeral 1 is a flushing type urinal drug solution injector, which detects a human body M and an electromagnetic valve 3 arranged between a water supply pipe 2 and a pipe 5 to a urinal 6. The control device 7 outputs a pump drive signal and a solenoid valve control signal, and a drug solution supply unit 9. The control device 7
The infrared sensor 73 for detecting that the human body M approaches the urinal and the fact that the human body M has left the urinal, and an electromagnetic valve control signal for controlling the opening and closing of the electromagnetic valve 3 are output, and the medicine solution supply unit 9 A control circuit 72 that outputs a pump drive signal that controls the drive of the pump 8 and a power supply device 71 are provided.

The chemical solution supply section 9 includes a chemical solution tank 91,
The pump 8, the supply tank 92, the float valve 93 provided in the supply tank 92, and the supply pipe 4 connected to the pipe 5.
It has and.

FIG. 2 is an exploded perspective view of the flush type urinal drug solution injector 1. In FIG. 2, the frame 11
Is fixed to a push button type flash valve 12 connected between the water supply pipe 2 and the pipe 5. A supply tank 92, a solenoid valve 3, a plunger type constant flow pump (hereinafter simply referred to as a pump) 8, a chemical liquid tank 91, and a battery 71 as a power supply device are attached to the frame 11.

Next, the operation of the flush-type urinal drug solution injector 1 having the above construction will be described. When the human body M stands in front of the urinal 6, the sensor 73 senses and a human body detection signal is input to the control circuit 72. When this human body detection signal is input, the control circuit 72 opens the solenoid valve 3 for a predetermined time to flow water from the water supply pipe 2 to pre-wash the urinal. At this time, since the drug solution does not flow out, waste of the drug can be prevented. After that, when the human body M leaves the urinal 6 after urination, the sensor 73 does not output the human body detection signal. When the human body detection signal is no longer output, the control circuit 72 opens the solenoid valve 3 for a predetermined time to allow water from the water supply pipe 2 to flow and post-clean the urinal.

At this time, a part (about 100 ml) of the washing water flowing through the pipe 5 connecting the solenoid valve 3 and the urinal 6 flows backward from the supply pipe 4 to the supply tank 92. At the same time as a part of the wash water flows back to the supply tank 92, a pump drive signal is output from the control circuit 72, so that the pump 8 has a predetermined amount (about 0.
The chemical solution of 1 ml / 1 time is supplied from the chemical solution tank 91 to the supply tank 92. In the supply tank 92, the cleaning water and the chemical solution are easily mixed. After that, when the solenoid valve 3 is closed and the flow rate of washing water is reduced and the water pressure is reduced, the supply tank 92
The mixed chemical solution therein is supplied from the supply pipe 4 to the urinal 6 through the pipe 5. This mixed chemical solution has a pH of 5.
Since it is maintained at less than 0, urine stones are prevented from adhering to the urinal 6 and its drain pipe (not shown).

Next, the operation of the solenoid valve 3 will be described with reference to FIG. 3 showing the internal structure thereof. When the solenoid valve is actuated by the solenoid valve control signal output from the control circuit 72, the valve portion A1 moves upward. At this time, the cylinder cover
Since the small hole portion 17-1 formed in 17 opens, the supply water in the space 17-2 filled with the supply water is discharged from the discharge port 17-3 formed in the cylinder cover 17 and communicates with it. It is discharged from the tank supply / discharge port. When the small hole portion 17-1 is opened, the water pressure in the water supply pipe is reduced. Therefore, when the water pressure on the upper surface of the valve seat 19 is reduced, the discharge port 3-1 of the cylinder is opened and discharged. At this time, a portion of the differential pressure between the water supply pressure and the drainage pressure (about 100 ml) is supplied from the tank water supply port into the supply tank 92. When the electromagnetic valve is closed after a predetermined time, the drainage pressure further decreases, so that the chemical solution in the supply tank 92 is discharged from the tank supply / drain port through the pipe 5 to the urinal 6.
By keeping the pH of the drug solution below 5.0, urine stones are prevented from adhering to the urinal and its drain.

Next, the supply tank 92 will be described with reference to FIG. In FIG. 4A, the supply tank 92 is the solenoid valve 3
In order to secure a space for arranging, the flat section is formed in a U shape so as to surround the solenoid valve 3. Then, as shown in the side sectional view of FIG. 4B, a float valve 93 is arranged inside the supply tank 92. This float valve 9
The inflow space at the bottom of 3 is connected to the water supply port on the opposite side.

Description of Pump FIG. 5 is a side sectional view of the pump 8, and FIG. 6 is a plan sectional view of the pump 8. 5 and 6, when electricity from the power supply device (battery) 71 is supplied to the motor 85 of the pump through the control circuit 72, the motor rotates and the worm gear 81 mounted on the motor shaft rotates. The rotation of the worm gear causes the gear 82 to rotate at a predetermined reduction ratio. The eccentric shaft mounted on this gear causes the piston 83
Is driven back and forth. The stroke at that time is about 2 mm. The piston is equipped with a piston valve and a piston support rod, the cylinder including the piston is equipped with a discharge port 87, a suction port 88 and a backflow prevention ball 86, and the cylinder is fixed to a gear box mounted on the motor. Has been done.

When the piston moves to the suction port side due to the reciprocating motion of the piston, the piston valve swingably attached to the piston also moves to the suction port side. The chemical liquid remaining on the suction port side of the cylinder receives a compressive force due to the movement of the piston valve, and moves the piston valve to the discharge port side. At this time, the backflow prevention ball blocks the suction port to prevent backflow of the chemical liquid. The chemical liquid in the cylinder is delivered to the discharge port side from the discharge hole provided in the piston. When the piston moves to the discharge port side, the piston valve provided in the piston closes the discharge hole provided in the piston and moves to the discharge port side. At this time, the backflow prevention ball provided on the suction port side opens the suction port and sucks the liquid medicine into the cylinder. By the above reciprocating piston movement, the volume (about 0.05 milliliters / 1 stroke) defined by the stroke of the piston valve is discharged. The chemical solution discharged by such an accurate constant flow rate pump is mixed and diluted with water in the supply tank and supplied to the urinal. Therefore, by injecting about 0.1 ml of a chemical solution having a pH of 1.8 to 2.5 with respect to 100 ml of washing water per wash, urine having a pH of 6.0 to 6.5 excreted from the body. The pH of the mixed solution with is 3.
It is kept below 5 to 5.0. As described above, since the accurate injection amount can be maintained by using the plunger type constant flow rate pump, the pH in the urinal can be accurately maintained. Therefore, the pH in the urinal can be controlled so as to be maintained at less than 3.5 to 5.0, so that it is possible to reliably prevent urine stones from adhering to the urinal. Furthermore, it has become possible to more reliably prevent adhesion from the urinal to the drain pipe.

As shown in FIG. 7, the chemical liquid tank 91 has a concave bottom surface, and the pump 8 is provided at the lowest portion thereof.
The tip of the suction pipe to is arranged. Therefore, it is possible to surely inhale even if the amount of the residual liquid medicine becomes small.

The battery as the power source device 71 can be used for a long period of time without replacement by using a high capacity battery.

The chemical solution used is not particularly limited, but a solution containing sulfamic acid is preferable for preventing adherence of urinary stones. Further, in order to obtain a cleaning action, for example, anionic surfactants such as sodium lauryl sulfate and sodium dodecylbenzene sulfonate, and nonionic surfactants such as sorbitan monolaurate and monoglyceride laurate can be mentioned.

[0018]

EFFECTS OF THE INVENTION According to the present invention, since a chemical solution having a predetermined flow rate is accurately injected, the pH in the urinal facility is 3.5 to 10.
Since it has become possible to accurately maintain the range of less than 5.0, it is possible to reliably prevent urine stones from adhering to the urinal equipment. Furthermore, it has become possible to suppress corrosion of the urinal equipment and its drain pipe, and to more reliably prevent adhesion from the urinal equipment to the drain pipe.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a flush-type urinal drug solution injector used in the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is a structural explanatory view of a solenoid valve.

FIG. 4 is a plan sectional view of a supply tank.

FIG. 5 is a side sectional view of the pump.

FIG. 6 is a plan sectional view of the pump.

FIG. 7 is a side sectional view of a chemical liquid tank.

FIG. 8 is a time chart of the operation.

FIG. 9 is a conventional medicine injection device for flush urinal.

[Explanation of symbols]

1 Chemical solution injection device for flush urinal 2 water supply pipe 3 Solenoid valve 5 piping 6 urinals 7 Control device 72 Control circuit 73 sensor 8 pumps 9 Drug solution supply section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shiro Mizobata             3-1 Takezumi Shiba, 3-1 Ozumiikeshima, Kyotanabe, Kyoto Prefecture             Within the corporation (72) Inventor Yoshihiro Inoue             3-1 Takezumi Shiba, 3-1 Ozumiikeshima, Kyotanabe, Kyoto Prefecture             Within the corporation (72) Inventor Takashi Izuda             3-1 Takezumi Shiba, 3-1 Ozumiikeshima, Kyotanabe, Kyoto Prefecture             Within the corporation F-term (reference) 2D038 AA02                 2D039 AA04 CB01 CD00 DB04 DB08

Claims (3)

[Claims] 1. A method for preventing adherence of urinary stones to a flush urinal facility by using a flush type urinal drug solution injector attached to a water supply pipe to the flush urinal, wherein the flush urinal drug solution injector has a predetermined concentration. It is characterized in that the pH of the mixed waste water of urine, wash water, and chemical solution is maintained at 3.5 to less than 5.0 by injecting the chemical solution at a predetermined ratio with respect to the amount of wash water once. Method for preventing urinary cough adhesion in flush urinal equipment. 2. The urinary cough for flush-type urinal equipment according to claim 1, characterized in that when injecting the drug solution having a predetermined concentration, a constant flow pump is used to inject the drug solution having a predetermined concentration in a fixed amount. Anti-adhesion method. 3. The flush urinal facility according to claim 1, wherein, when injecting the chemical liquid of a predetermined concentration, a constant amount of the chemical liquid of a predetermined concentration is injected using a plunger type constant flow pump. Urine cough adhesion prevention method.