CN210774569U

CN210774569U - Sealing detection device of safety valve

Info

Publication number: CN210774569U
Application number: CN201921397782.1U
Authority: CN
Inventors: 李治涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-06-16
Anticipated expiration: 2029-08-27

Abstract

The utility model relates to a sealing detection device of a safety valve, which comprises a rubber stopper, a leakage collecting pipe, an air bag, a micro-pressure differential gauge and a bubble leakage collector; the rubber plug is used for sealing the safety valve to be detected; the leakage collecting pipe is inserted into the rubber plug and connected with the safety valve to be detected and the bubble leakage collector; the air bag and the micro-pressure differential pressure meter are respectively connected with the leakage collecting pipe, and the micro-pressure differential pressure meter is connected between the air bag and the bubble leakage collecting device. The sealing detection device provided by the utility model overcomes the requirements of the existing device on the working strength of the inspectors, the detection environment and other factors when the safety valve is sealed and detected; the detection simplicity and accuracy are effectively improved.

Description

Sealing detection device of safety valve

Technical Field

The utility model relates to a check out test set, concretely relates to sealed detection device of relief valve.

Background

The existing safety valve checking project comprises setting pressure detection and sealing pressure detection of the safety valve. The sealing performance of the safety valve directly affects the safety of operators, environmental protection and normal and safe operation of equipment, so that the sealing pressure detection of the safety valve plays an especially important role in the normal and safe operation of the equipment, the environmental protection and the safety of the operators.

In the existing sealing detection, after the pressure of compressed air or other gases is increased to 90% of the set pressure of a safety valve, a leakage collecting pipe is arranged at an exhaust outlet of the safety valve, the tail end of the pipe is inserted into a beaker filled with detection liquid, and the tail end of the pipe is ensured to be 12.5mm below the detection liquid level and parallel to the detection liquid level, so that the sealing detection of the safety valve can be carried out. The detection method is to express the leakage rate of the safety valve through the number of leakage bubbles. In this case, the number of bubbles at the end of the leak collecting tube needs to be observed by a tester in a concentrated manner within a predetermined time period, and counted. However, in manual statistics, the detection personnel need to concentrate on attention, interference is generated, detection needs to be carried out again, and time is wasted. And the number of bubbles is not obvious in a certain special environment, so that the detection personnel cannot accurately judge the bubbles, and the detection is inaccurate.

Secondly, when the safety valve leaks, the safety valve is filled in the cavity wall of the outlet of the safety valve, particularly, the cavity wall of the outlet of the safety valve with a large caliber is large, and the time for filling the cavity wall with the leaked safety valve is required, so that the misjudgment is caused to detection personnel, and the detection accuracy is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealed detection device of relief valve, the device have overcome current device and have examined time measuring in the relief valve is sealed, to the requirement of inspection personnel working strength, and factor such as testing environment. The utility model discloses the effectual simplicity and accuracy that have improved the detection.

The sealing detection device of the safety valve specifically comprises:

comprises a rubber stopper, a leakage collecting pipe, an air bag, a micro-pressure differential gauge and a bubble leakage collector; the rubber plug is used for sealing the safety valve to be detected; the leakage collecting pipe is inserted into the rubber plug and connected with the safety valve to be detected and the bubble leakage collector; the air bag and the micro-pressure differential pressure meter are respectively connected with the leakage collecting pipe, and the micro-pressure differential pressure meter is connected between the air bag and the bubble leakage collecting device.

Wherein, the rubber stopper is used for sealing the safety valve outlet and collecting leaked gas. The rubber plug can be in the shape of a conventional rubber plug; the utility model preferably adopts the rubber plug with the shape of a cone; the conical rubber plug replaces the existing heavy sealing disc in a flange mode; not only saves the cost, but also is more convenient to operate.

In practical operation, the conical surface of the rubber plug and the outlet of the safety valve are subjected to soft sealing.

The leakage collecting pipe is inserted into the rubber plug, so that the leaked gas can be effectively ensured to smoothly reach the bubble leakage collector. The leakage collecting pipe is inserted in the middle of the rubber plug.

The utility model further provides that the air bag is a dust-free air bag; a filter screen and 2 one-way valves are arranged in the dust-free air bag; the one-way valve is used for preventing air backflow.

The utility model discloses further provide, the aperture of filter screen is not more than 21 microns.

The dust-free air bag can filter out dust and particles with the particle size of more than 21 microns; the influence of the environment on the detection result is more effectively avoided.

The utility model further provides that the one-way valves are respectively arranged at the upper end and the lower end of the dust-free air bag; the one-way valve arranged at the upper end is an air outlet one-way valve, and the one-way valve arranged at the lower end is an air inlet one-way valve.

The one-way valve can effectively prevent air from flowing back; the air in the outlet cavity wall of the safety valve is filled before the sealing pressure is detected, so that the misjudgment of detection personnel is prevented.

The utility model discloses further provide, the micro-pressure differential gauge is digital micro-pressure differential gauge.

The digital micro-pressure differential pressure gauge is a micro-pressure high-precision high-sensitivity high-stability pressure gauge. The pressure change between 0 and 13kpa can be detected, the measured value is not influenced by any environment and position change, and the value change of the sealing pressure can be accurately read. In addition, the digital micro-pressure differential gauge also has the functions of a timer, recording the highest pressure difference and the like.

Wherein, the air bag and the micro-pressure differential gauge are connected with the leak collecting pipe in a conventional way, for example, a tee joint is adopted for connection.

The utility model further provides, the bubble leak collector comprises a detection liquid container, a detection liquid inlet and a detection liquid outlet; the inlet end of the leak collecting pipe is connected with the detection liquid container, and the axis of the outlet end of the leak collecting pipe is vertically inserted below the detection liquid level.

Preferably, the outlet end of the leak collecting pipe is kept smooth.

The utility model discloses further provide, the exit end of collection hourglass pipe inserts and detects 12 ~ 13mm departments under the liquid level.

Preferably, the outlet end of the leak collecting pipe is inserted 12.5mm below the detection liquid level.

The utility model further provides that the detection liquid inlet is provided with a funnel and a stop valve;

an emptying stop valve is arranged at the detection liquid outlet;

the detection liquid container is provided with scales, and overflow ports are formed in the scales; the height from the scales to the outlet end of the leakage collecting pipe is 12.5 mm.

The utility model provides an optimal scheme, sealed side device of examining specifically do:

the safety valve to be detected is sequentially connected with a rubber plug, a dust-free air bag, a digital micro-pressure differential pressure gauge and a bubble leak collector through a leak collecting pipe; the rubber plug is used for sealing the safety valve to be detected, and the leakage collecting pipe is inserted into the rubber plug; a filter screen with the aperture not larger than 21 microns and 2 one-way valves are arranged in the dust-free air bag; the one-way valve is used for preventing air from flowing back; the one-way valves are respectively arranged at the upper end and the lower end of the dust-free air bag; the one-way valve arranged at the upper end is an air outlet one-way valve, and the one-way valve arranged at the lower end is an air inlet one-way valve; the bubble leak collector comprises a detection liquid container, a detection liquid inlet and a detection liquid outlet; the inlet end of the leak collecting pipe is connected with the detection liquid container, and the axis of the outlet end of the leak collecting pipe is vertically inserted into a position 12.5mm below the detection liquid level.

The utility model provides a sealed detection device of relief valve is full of the air in relief valve outlet chamber wall before detecting through dustless gasbag, prevents measurement personnel's erroneous judgement. Whether the sealing pressure of the safety valve is qualified or not can be clearly detected through the digital micro-pressure differential pressure gauge. The device is simple, convenient and accurate, and has practical application significance.

Drawings

Fig. 1 is a schematic structural view of a sealing detection device of the safety valve of the present invention;

in the figure: 1. an outlet of the safety valve; 2. a rubber stopper; 3. a leakage collecting pipe; 4. a dust-free air bag; 5. a digital micro-pressure differential gauge; 6. a bubble collector; 7. a funnel; 8. a stop valve; 9. an overflow port; 10. an emptying stop valve; 11. and (6) detecting the liquid.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Examples

Referring to the attached figure 1, the sealing detection device of the safety valve consists of a rubber plug 2, a leakage collecting pipe 3, a dust-free air bag 4, a digital micro-pressure differential pressure gauge 5 and a bubble leakage collector 6;

the rubber plug 2 can be in various types, and a proper rubber plug is selected according to different types of the safety valve outlet and plugged into the safety valve outlet to ensure the sealing of the safety valve outlet. The center through hole is arranged in the middle of each rubber plug, so that the leakage collecting pipe 3 can be conveniently inserted, the smooth flow direction of air in the inner wall cavity of the outlet of the safety valve to the leakage collecting pipe 3 is ensured, and the air finally flows into the bubble leakage collecting device 6.

The tail end of the leak collecting pipe 3 is inserted into the bubble leak collector 6 filled with the detection liquid 11, and the outlet end of the leak collecting pipe is ensured to be 12.5mm below the plane of the detection liquid 11 and parallel to the detection liquid level (axially and vertically inserted).

The bubble leak collector 6 comprises a detection liquid container with scales, a funnel 7 is arranged at the upper end of the detection liquid container, a stop valve 8 is arranged at the lower end of the funnel 7, and when the detection liquid is short, the detection liquid 11 is poured into the funnel 7 by opening the stop valve 8; when the corresponding scale is reached, the shut-off valve 8 is closed. The lower extreme of bubble collection hourglass ware 6 has an evacuation stop valve 10, can discharge through evacuation stop valve 10 when detecting liquid 11 and annotate too much and detect liquid for the liquid level of control detection liquid can also be changed through evacuation stop valve 10 simultaneously and detect liquid. An overflow port 9 is arranged above the liquid level of the bubble leakage collector 6, and the overflow port has the main functions of ensuring the normal pressure in the leakage collector and the overflow of the detection liquid.

Wherein, the middle section of collecting leakage pipe 3 connects one and carries out the flexible coupling through tee bend and specialty dust free air bag 4, and specialty dust free air bag 4 has two check valves, and the upper end of gasbag is a check valve of giving vent to anger, and the lower extreme of gasbag is a check valve of admitting air. The main effect is that the safety valve is filled with gas in the wall of the outlet cavity and the leak collecting pipe, and the bubble display in the bubble leak collector is ensured when gas is slightly discharged during the gas tightness detection of the safety valve.

The leak collecting pipe 3 close to one end of the bubble leak collector 6 is connected with a digital micro-pressure differential pressure meter 5 through a tee joint, the digital micro-pressure differential pressure meter 5 can detect pressure change between 0 and 13kpa, the measured value is not influenced by any environment and position change, the value change of sealing pressure can be accurately read, and the differential pressure meter can be displayed in a digital form as long as gas is discharged when the safety valve is subjected to gas tightness detection. The tester can clearly judge whether the safety valve air tightness test is qualified.

In this embodiment, an air tightness detection experiment of a safety valve is taken as an example, and the specific detection steps are as follows:

whether the outlet end of the leak collecting pipe 3 is 12.5mm below the detection liquid is checked, if the liquid level is low, the stop valve 8 needs to be opened, and the detection liquid is added through the funnel 7. If the liquid level is high, the emptying stop valve 10 needs to be opened, the excessive detection liquid 11 is discharged to reach the proper position, and the end of the pipe is ensured to be 12.5mm below the level of the detection liquid 11 and be parallel to the detection liquid level. Then the rubber plug 2 is plugged into the safety valve outlet 1, so that the safety valve outlet 1 and the rubber plug 2 are fully contacted without air leakage. Secondly, the dust-free air bag 4 is pinched, the cavity wall of the safety valve outlet 1 and the leakage collecting pipe 3 are filled with air, the digital micro-pressure differential pressure gauge 5 is opened, and the safety valve air tightness detection device is installed. And adjusting the sealing pressure of the safety valve, observing whether the digital micro-pressure differential pressure gauge 5 has pressure, if so, indicating that the sealing pressure is unqualified, and if the digital micro-pressure differential pressure gauge 5 does not have pressure, indicating that the sealing pressure of the safety valve is qualified. And whether bubbles are discharged from the detection liquid 11 is observed, and the detection liquid is qualified according to the standard regulation of TSGZF001-2006 Special equipment safety technical Specification and GB/T12243-2005 spring direct load type safety valve.

Although the invention has been described in detail in the foregoing by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that certain modifications and improvements may be made thereto based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The sealing detection device of the safety valve is characterized by comprising a rubber plug, a leakage collecting pipe, an air bag, a micro-pressure differential pressure gauge and a bubble leakage collector;

the rubber plug is used for sealing the safety valve to be detected;

the leakage collecting pipe is inserted into the rubber plug and connected with the safety valve to be detected and the bubble leakage collector;

the air bag and the micro-pressure differential pressure meter are respectively connected with the leakage collecting pipe, and the micro-pressure differential pressure meter is connected between the air bag and the bubble leakage collecting device.

2. The seal detection apparatus of claim 1, wherein the air bag is a dust-free air bag; a filter screen and 2 one-way valves are arranged in the dust-free air bag; the one-way valve is used for preventing air backflow.

3. The seal detection apparatus of claim 2, wherein the filter mesh has a pore size of not more than 21 μm.

4. The seal detection apparatus according to claim 2, wherein the check valves are provided at upper and lower ends of the dust-free air bag, respectively; the one-way valve arranged at the upper end is an air outlet one-way valve, and the one-way valve arranged at the lower end is an air inlet one-way valve.

5. The seal detection apparatus of claim 1, wherein the differential pressure differential gauge is a digital differential pressure differential gauge.

6. The seal detection device according to any one of claims 1 to 5, wherein the bubble trap comprises a detection liquid container, a detection liquid inlet, and a detection liquid outlet;

the inlet end of the leak collecting pipe is connected with the detection liquid container, and the axis of the outlet end of the leak collecting pipe is vertically inserted below the detection liquid level.

7. The seal detection device according to claim 6, wherein the outlet end of the leak collecting pipe is inserted 12-13 mm below the detection liquid level.

8. The seal detection apparatus according to claim 6, wherein the outlet end of the leak-collecting pipe is inserted 12.5mm below the detection liquid level.

9. The seal detection device according to claim 6, wherein the detection liquid inlet is provided with a funnel and a stop valve;

an emptying stop valve is arranged at the detection liquid outlet;

10. The seal detection device according to claim 1, wherein the safety valve to be detected is connected with a rubber plug, a dust-free air bag, a digital micro-pressure differential pressure gauge and a bubble leak collector in sequence through a leak collecting pipe;

a filter screen with the aperture not larger than 21 microns and 2 one-way valves are arranged in the dust-free air bag; the one-way valve is used for preventing air from flowing back; the one-way valves are respectively arranged at the upper end and the lower end of the dust-free air bag; the one-way valve arranged at the upper end is an air outlet one-way valve, and the one-way valve arranged at the lower end is an air inlet one-way valve;

the bubble leak collector comprises a detection liquid container, a detection liquid inlet and a detection liquid outlet;

the inlet end of the leak collecting pipe is connected with the detection liquid container, and the axis of the outlet end of the leak collecting pipe is vertically inserted into a position 12.5mm below the detection liquid level.