JPH0222816B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pressurized testing of sanitary ware for water leakage and air leakage.

When using sanitary ware, there is a risk of water leakage,
There should be no air leaks. In order to maintain the quality of manufactured sanitary ware and sell ceramics of a certain quality on the market, manufactured sanitary ware is inspected for water leakage and air leakage. The conventional method for testing sanitary ware for water and air leaks is to place the ware horizontally, fill the reservoir in the trap of the porcelain with water, and check for water and air leaks from the changes in the water level on a manometer. method was adopted. According to this method, first hold the pottery horizontally, fill the reservoir in the trap with water, seal the drain opening of the drain channel with an iron plate coated with urethane resin or rubber, and then open the solenoid valve. When the water level on the manometer reached a certain level, the solenoid valve was closed, and after a certain period of time the water level on the manometer was checked for water leakage or air leakage from the pottery. However, with this method, the water leakage and air leakage tests are performed after filling the water reservoir in the pottery trap with water, so if there are any water or air leakage points in the pottery, the drainage channel must be checked before the inspection. There is a possibility of getting wet, and defects such as micro cracks and pinholes that get wet will be blocked by water, reducing inspection accuracy. In addition, it can only test for water leakage and air leakage from drainage channels, and furthermore, the current configuration can only apply pressure to about 80 mm of water column, so it has the disadvantage of poor inspection accuracy. Ta.

The present invention eliminates the drawbacks in the prior art and
To provide a method for inspecting water leakage and air leakage from ceramics.

An object of the present invention is to provide an inspection method that does not use water in the inspection process, so that the sanitary ware does not get wet with water and has high detection accuracy.

A feature of the present invention is that it is possible to inspect all water leakage and air leakage throughout the pottery.

The feature of the present invention is that the pressurization test pressure can be increased (for example, about 2000 mm of water column), so water leakage and air leakage can be tested with high precision in a short time.

A further object of the present invention is to quickly stabilize the pressure by providing a pressure relief device together with a manometer, and by reducing the internal volume of the pottery with a box or the like, it is possible to test for water leaks and air leaks more accurately in a shorter time. It lies in what you can do.

In order to facilitate understanding of the present invention, the prior art method will first be described in detail. FIG. 3 shows a conventional method for testing sanitary ware for water leakage and air leakage. A Western-style toilet bowl will be explained as a typical example of sanitary ware. The sanitary ware 101 has a drainage channel 130,
The drainage channel 130 is separated from the water supply port by a ceramic wall 138, and has an upper opening 134 at the top and a lower opening, ie, a drain 136 at the bottom. Drain port 13
A sealing device 105 for sealing the iron plate 10
3, a sealing body 102 made of urethane resin or rubber, and an air cylinder 104, and a conduit 140 is provided to penetrate the sealing device 105. One end of the conduit 140 is connected to a manometer, and the other end communicates within the drainage channel. A conduit 142 branches from the conduit 140, and the solenoid valve 1
It is connected to one end of 10. The other end of the solenoid valve is connected to a pressure source (not shown).

The inspection process in the prior art is as follows. First, the sanitary ware 101 is placed horizontally, the internal trap reservoir 132 is filled with water, and the sealing body 102 is pressed against the drain port 136 by the air cylinder 104 to seal the drain channel 130. Next, the solenoid valve is opened to pressurize the inside of the drainage channel 130. When the water level on the manometer 120 reaches a certain water level B, the solenoid valve 110 is closed and a water leakage and air leakage test is started. When the water level of the manometer 120 is above the water level C after a certain period of time, the sanitary ware 101
It is determined that there is no water leakage or air leakage, and when the water level falls below water level C, it is determined that there is water leakage or air leakage.

Next, a preferred embodiment of the invention of the present application will be described with reference to FIGS. 1 and 2.

FIG. 1 shows the sanitary ware 10 in a state before water leakage and air leakage testing is started, that is, before a pressurizing device 20 and sealing devices 30, 40 are attached to the sanitary ware 10. In Figure 1, sanitary ware 1
0 has a ball top surface 12 that opens upward, a water supply port surface 14, and a drain port surface 16 that opens downward, and is placed on a pallet 19.

The pressurizing device 20 includes a sealing part 15, an air cylinder 28, and a solenoid valve 27.
5 consists of an iron plate 22, a sealing body 21 made of urethane resin, rubber, etc., and a box 25 for reducing the internal volume of the sanitary ware 10. A branch pipe 70 passes through the box 25. Branch pipe 70
is connected to one end of the solenoid valve 27 and the manometer 50, and the remaining end opens into the interior of the sanitary ware 10. The other end of the solenoid valve 27 is connected to a pressure source. The pressurizing device is adapted to press the sealing body 21 against the ball upper surface 12 of the sanitary ware 10 in a sealing manner by means of an air cylinder 28.

The upper sealing device 30 includes an iron plate 34 , a sealing body 36 made of urethane resin, rubber, etc., and an air cylinder 32 .
It is designed so that it can be pressed freely to seal it. The lower sealing device 40 includes an iron plate 44, a sealing body 46 made of urethane resin, rubber, etc., and an air cylinder 4.
2, and its sealing body 46 can be pressed against the drain port surface 16 of the sanitary ware 10 in a sealing manner by an air cylinder 42.

FIG. 2 shows a pressurizing device 20, sealing devices 30 and 4.
0 is set to sanitary ware. A manometer 50 connected to the pressurizing device is filled with water, and the water level A indicates the atmospheric pressure before starting pressurizing the sanitary ware 10. The water level B indicates the internal pressure of the sanitary ware 10 when the sanitary ware 10 is pressurized. Water level C indicates water leakage to sanitary ware 10.
The limit water level for determining whether there is an air leak is displayed.

The pressure relief device 60 includes a water tank 62 filled with water.
and a pipe line 64 branching from the branch pipe 70. The pressure relief device 60 is the sanitary ware 1
When pressurizing the inside of the sanitary ware 10, the purpose is to alleviate the pressure change inside the sanitary ware 10 and stabilize the water level of the manometer 50 at an early stage. Note that the pressure relief device may be a method in which a branch valve is attached to the middle part of the branch pipe 70 and the internal pressure is relieved by opening and closing operations. However, the pressure relief device 6
Water leakage and air leakage can be tested using the manometer 50 without providing 0.

More specifically, the pressure relief device 6 described above
By using 0, even if an attempt is made to pressurize the inside of the sanitary ware beyond the water pressure corresponding to the submerged dimension of the pipe 64, the excess pressure will escape from the lower end of the pipe 64 in the form of bubbles. As long as the submersion dimension is accurately set to a dimension corresponding to the desired pressurizing pressure, the pressure inside the sanitary ware can be brought to the predetermined water pressure (corresponding to the predetermined water level B) in a short time.

Next, a process of inspecting the sanitary ware 10 for water leakage and air leakage will be explained. The pressurizing device 20 is connected to the air cylinder 28
to seal the upper surface 12 of the ball.
Next, the upper sealing device 30 is lowered by the air cylinder 32 to seal the water supply port surface 14. The lower sealing device 40 is raised by the air cylinder 42 to seal the drain port surface 16. The solenoid valve 27 is opened to pressurize the sanitary ware 10. The pressurized pressure inside the sanitary ware is measured by a manometer 50 via a pressure stabilizer 60.
is transmitted to. When the water level on the manometer 50 rises to B, the solenoid valve 27 is closed and a water leakage and air leakage test is started. After a certain period of time has elapsed, if the water level on the manometer 50 is C or higher, it is determined that there is no leakage of water or air in the sanitary ware 10, and if the water level is below C, it is determined that there is a leakage of water or air. Even without the pressure relief device 60, the purpose of inspecting water leakage and air leakage can be achieved by the above-described procedure, but the pressure relief device 60 can alleviate pressure changes inside the manometer and lower the water level in the manometer. Stabilization can be achieved more accurately and in a shorter time.

When the inspection for water leakage and air leakage of the sanitary ware 10 is completed, the air cylinder 42 is lowered and the sanitary ware 1
0. The inside of the pressurizing device 20, the pressure stabilizing device 60, and the manometer 50 are opened to the atmosphere, and then the air cylinders 28 and 32 are raised to remove the pressurizing device 20 and the upper sealing device 30 from the sanitary ware 10. Note that the water levels (A, B, C) are determined using known electrical and optical methods, and do not limit the present invention.

As explained above, the features of the present invention are (1) sanitary ware does not get wet with water, and detection accuracy is high.

(2) All sanitary ware can be inspected for water and air leaks.

(3) Since the inspection pressure can be increased, inspection can be carried out in a short time and with high accuracy.

(4) By using a box and reducing the internal volume of the ceramic, pressure stabilization is quick and detection accuracy is improved.

(5) Since it is equipped with a pressure relief device, inspections can be carried out in a short time.

(6) This operation does not require much human effort,
It greatly contributes to automation and labor saving.

[Brief explanation of drawings]

FIG. 1 shows the state of the sanitary ware before water leakage and air leakage testing is started, and shows a sectional view of the sanitary ware, a pressurizing device for sealing it, and a sealing device. FIG. 2 shows a state in which the sanitary ware is tested for water leakage and air leakage, and shows a sectional view of the sanitary ware, the pressurizing device, the sealing device, and the manometer. FIG. 3 is a schematic diagram for explaining a conventional water leakage and air leakage testing method. ○A represents the state in which water is stored in the trap internal water reservoir. ○ indicates the state in which the inside of the trap is pressurized. 10... Sanitary ware, 20... Pressure device, 50...
...Manometer, 60...Pressure stabilizer, A, B,
C...Water level.

Claims (1)

[Claims] 1. A method for inspecting sanitary ware for water leakage and air leakage, which involves sealing and pressurizing the entire opening of the sanitary ware, and reading changes in the water level of a manometer communicating with the inside of the pressurized sanitary ware. How to test for water leakage and air leakage. 2. By sealing and pressurizing the entire opening of the sanitary ware and communicating the inside of the sanitary ware with the manometer via a pressure relief device, changes in the water level in the manometer can be quickly stabilized and changes in the water level in the manometer can be read. A method for inspecting sanitary ware for water leakage and air leakage according to claim 1.