CN212158978U

CN212158978U - Valve sealing surface leakage inspection device

Info

Publication number: CN212158978U
Application number: CN201921187655.9U
Authority: CN
Inventors: 任利杰; 张啸峰; 赵首琦; 施叶明; 宋涛; 李俊
Original assignee: CNNC Sufa Technology Industry Co Ltd
Current assignee: CNNC Sufa Technology Industry Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-12-15
Anticipated expiration: 2029-07-26

Abstract

The utility model belongs to valve leakage inspection field specifically relates to a sealed face of valve leaks verifying attachment, wherein, including UNICOM's ware and overflow collection device, wherein, UNICOM's ware is U type container, and one end is the water filling port, and the other end sets up the overflow mouth for cutting the mouth on the trunk line of water filling port one side, and the below of overflow mouth sets up overflow collection device. This neotype effect that is showing is: the inspection device and the inspection method are mainly suitable for valve sealing surface leakage inspection. The method can replace the traditional bubble counting method to measure and calculate the leakage amount, and is more visual and accurate.

Description

Valve sealing surface leakage inspection device

Technical Field

The utility model belongs to valve leakage inspection field specifically relates to a sealed face of valve leakage inspection device.

Background

The valve is used as a pressure-bearing device, is widely applied to the industries of petrochemical industry, coal chemical industry, nuclear power and the like, mainly plays a role in cutting off media, works normally, and is related to the safety production of the whole set of equipment.

At present, the leakage inspection of a valve sealing surface is carried out by a bubble counting method, the technical method is unreliable, the result is not visual, and the inspection result is inaccurate because the relation between the number of bubbles and the actual leakage amount is only an empirical formula.

SUMMERY OF THE UTILITY MODEL

The purpose of the present application is to provide a method for checking the leakage of a valve sealing surface, which can solve the problem of checking the leakage of the valve sealing surface in the background art, display the result with intuitive leakage amount, and improve the checking precision.

This is novel to realize like this: the utility model provides a sealed face of valve leaks verifying attachment, includes UNICOM's ware and overflow collection device, wherein the UNICOM's ware is U type container, and one end is the water filling port, and the other end is for cutting the mouth, sets up the overflow mouth on the trunk line of water filling port one side, and the below of overflow mouth sets up overflow collection device.

The valve sealing surface leakage inspection device is characterized in that the water filling valve is arranged on the water filling port.

The valve sealing surface leakage inspection device is characterized in that the cut-off port is provided with a cut-off valve.

The valve sealing surface leakage inspection device is characterized in that the position of the water filling port and the position of the overflow port of the communicating device are higher than the position of the cutoff port.

The valve sealing surface leakage inspection device as described above, wherein the liquid level of the shut-off port is a reference liquid level.

This neotype effect that is showing is: the inspection device and the inspection method are mainly suitable for valve sealing surface leakage inspection. The method can replace the traditional bubble counting method to measure and calculate the leakage amount, and is more visual and accurate.

Drawings

FIG. 1 is a schematic diagram of a method for leak testing a valve sealing surface.

FIG. 2 is a schematic diagram of a valve seal face leakage testing device with a liquid level difference.

In the figure: 1. cut-off valve 2, communicating vessel 3, overflow collecting device 4, overflow port 5, water injection valve 6 and cut-off valve

Detailed Description

The present invention will be further explained with reference to the accompanying drawings

The utility model provides a device for valve sealing face leakage test, wherein, includes UNICOM's ware and overflow collection device, wherein UNICOM's ware is U type container, and one end is the water filling port, and the other end is for cutting the mouth, sets up the overflow mouth on the trunk line of water filling port one side, and the below of overflow mouth sets up overflow collection device.

The device for checking the leakage of the sealing surface of the valve is characterized in that the water filling valve is arranged on the water filling port.

The device for the valve sealing surface leakage inspection is characterized in that the cut-off port is provided with a cut-off valve.

The device for checking the leakage of the sealing surface of the valve is characterized in that the cutoff opening is communicated with the valve to be tested, and the two cutoff valves are respectively arranged on two sides of the cutoff opening.

The device for checking the leakage of the sealing surface of the valve is characterized in that the water filling port and the overflow port of the communicating device are higher than the position of the cutoff port.

The device for the valve sealing surface leakage inspection is characterized in that the liquid level of the cutoff opening is a reference liquid level.

A method for valve sealing face leak testing, comprising the steps of:

the method comprises the following steps: water injection

Before the inspection, the upstream side cut-off valve is closed, the downstream side cut-off valve is opened, and the water injection valve is opened for water injection, so that the water levels at the two ends of the communicating device are balanced and reach the reference liquid level;

step two: examination of

During inspection, the upstream side cut-off valve is opened, the downstream side is closed, leaked gas enters the communicating device, the gas pushes the liquid level at the cut-off end to descend, the liquid level at the water injection port end rises, and liquid level difference occurs;

step three: measuring

And closing the upstream side cut-off valve, converting the volume of the leaked gas into the liquid volume increment at the water injection port end of the communicating device, and summing the liquid volume increment at the water injection port end of the communicating device and the volume of the liquid in the overflow collecting device to obtain the final volume of the leaked gas.

The method for detecting the leakage of the sealing surface of the valve is characterized in that the height difference between the overflow port and the lowest position of the liquid level in the communicating device is constant, so that the phenomenon that leakage gas enters the communicating device due to overhigh water pressure is avoided, and the detection precision is reduced.

1. Establishing a constant volume liquid chamber

A set of mechanisms is used to create a constant volume liquid chamber to collect the leaking gas by a liquid discharge method.

2. Leaked gas collecting structure

The liquid cavity adopts the structure of UNICOM's ware, and the leakage gas inserts UNICOM ware one end, extrudees intracavity liquid, makes UNICOM ware both sides liquid level appear the liquid level difference, and accessible liquid level difference calculates and reachs the leakage gas volume.

Specifically, the method comprises the following steps: 1. according to the principle, a detection mechanism can be established as shown in the figure, and the detection mechanism comprises the following components: the device comprises a shut-off valve 1, a communicating vessel 2, an overflow collecting device 3, an overflow port 4, a water injection valve 5 and a shut-off valve 6. The communicating vessel 2 collects leakage gas, and the cut-off valve 1 and the cut-off valve 6 control the operation of the pipeline.

(test step) before the test, the cut-off valve 1 is closed, the cut-off valve 6 is opened, and the water injection valve 5 is opened to inject water so that the water level at the A, B end reaches the reference liquid level. The fill valve 5 is closed and the mechanism is in the state of figure 1. When in inspection, the cut-off valve 1 is opened, the cut-off valve 6 is closed, leaked gas enters the communicating device, the gas pushes the liquid level at the end A to descend, the liquid level at the end B to ascend, and liquid level difference occurs. And thirdly, closing the cut-off valve 1 to enable the device to be in the state shown in figure 2. At this time, a liquid level difference is generated between the two ends of A, B, and the volume of the leaked gas is converted into the liquid volume increment at the B end of the communicating device.

2. If the leakage amount is large, the situation of large liquid level difference can occur, and at the moment, the leakage gas can be prevented from entering the communicating device due to the overhigh pressure head of the water, so that the inspection precision is reduced. In order to prevent the situation, an overflow port is arranged at a certain height, when the liquid level exceeds the overflow port, the liquid enters an overflow collecting device from the overflow port, and finally the volume of the leaked gas is calculated by two-stage summation of the volume of the liquid in the collecting device and the increment of the volume of the liquid at the B end of the communicator.

Claims

1. The utility model provides a sealed face of valve leakage testing arrangement which characterized in that: including UNICOM ware (2) and overflow collection device (3), wherein UNICOM ware (2) are U type container, and one end is the water filling port, and the other end is for cutting the mouth, sets up overflow mouth (4) on the trunk line of water filling port one side, and the below of overflow mouth (4) sets up overflow collection device (3).

2. A valve sealing face leak testing apparatus as defined in claim 1, wherein: and a water injection valve (5) is arranged on the water injection port.

3. A valve sealing face leak testing apparatus as defined in claim 1, wherein: the cut-off port is provided with cut-off valves (1, 6).

4. A valve sealing face leak testing apparatus as defined in claim 1, wherein: the positions of the water injection port and the overflow port (4) of the communicating device (2) are higher than the position of the cutoff port.

5. A valve sealing face leak testing apparatus as defined in claim 1, wherein: the liquid level height of the cut-off is the reference liquid level height.