Breather valve detection system

Abstract

According to the breather valve detection system provided by the utility model, the air capacitor, the detection module and the control module are arranged, the air inlet pressure regulating valve is arranged on the first external connecting pipeline, and the air inlet pressure gauge and the pressure sensor are arranged in front of and behind the air inlet pressure regulating valve, so that the pressure can be accurately regulated and monitored; a positive pressure connecting pipeline is connected in parallel, an inlet flow meter is installed, and a second external connecting pipeline is provided with an outlet flow meter, so that the leakage amount and the sensitivity of the breather valve in self-closing and opening states can be measured and analyzed when the breather valve is calibrated and detected under the condition of different air capacity airflow flow and pressure changes. Therefore, the comprehensive performance of closing and opening of the breather valve is comprehensively evaluated. The first external connecting pipeline is communicated with the negative pressure connecting pipeline and is provided with a vacuum pump, the condition that the pressure in the container changes due to various factors can be simulated, the opening and closing performance of the breather valve under the positive pressure threshold value and the negative pressure threshold value is effectively detected, and the defect that the performance of the breather valve under different working conditions is difficult to comprehensively and accurately assess through a traditional single pressure test is overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to a breathing valve detection technical field especially is related to a breathing valve detection system. BACKGROUND

[0002] The breathing valve is as the key safety part of various storage containers (such as oil tank, chemical storage tank etc.), has the extensive and indispensable application in gas and oil chemical ship, petroleum chemical industry, energy, food and beverage and numerous industrial fields.The main function is to adjust and control the balance of the pressure inside liquid cargo hold or container, when the pressure inside liquid cargo hold or container rises and exceeds the set positive pressure threshold value due to liquid evaporation, temperature change or other factors, the breathing valve opens automatically to exhaust to the outside, to maintain the pressure balance inside liquid cargo hold or container, effectively prevent liquid cargo hold or container from overpressure rupture;When the pressure inside liquid cargo hold or container drops to the negative pressure threshold value due to the extraction of liquid or the decrease of ambient temperature, the breathing valve opens to inhale air, to avoid liquid cargo hold or container from being deformed due to negative pressure.The precise control of the pressure of storage hold or container not only guarantees the structural integrity and service life of storage hold or container, but also plays a crucial role in the safety and stability of the whole storage system.For example, in the civil oil, gas transport ship and petroleum chemical industry, a large number of flammable, explosive or toxic and harmful liquid chemicals are stored in liquid cargo hold or large storage tank, once the breathing valve fails to cause the overpressure rupture or negative pressure deformation of storage hold or storage tank, it will most likely cause serious fire, explosion, leakage and other catastrophic accidents, which will cause immeasurable loss to personnel life safety, marine pollution, ecological environment and enterprise production and operation.

[0003] However, the current quality detection technology for breathing valve has many deficiencies.The traditional detection method often relies on simple pressure testing device, and this single pressure test is difficult to comprehensively and accurately evaluate the performance of breathing valve under different working conditions.For example, in actual application, the breathing valve faces complex and changeable airflow speed, pressure fluctuation range and different gas medium environment. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of breathing valve detection system, can simulate the detection of breathing valve under multi-working condition.

[0005] The utility model provides a kind of breathing valve detection system, including gas capacity, detection module and control module, gas capacity is equipped with for being detected breathing valve, the detection module includes first outer connecting pipeline and second outer connecting pipeline being communicated with the gas capacity respectively, inlet pressure regulating valve is installed on the first outer connecting pipeline, inlet pressure gage and pressure sensor are respectively equipped on the first outer connecting pipeline before and after the inlet pressure regulating valve, positive pressure connecting pipeline is shunt between the inlet pressure regulating valve and the inlet of the gas capacity on the first outer connecting pipeline, inlet flowmeter is equipped on the positive pressure connecting pipeline, outlet flowmeter is equipped on the second outer connecting pipeline;Negative pressure connecting pipeline is also communicated on the first outer connecting pipeline, vacuum pump is installed on the negative pressure connecting pipeline;The inlet flowmeter, outlet flowmeter and vacuum pump are all with the control module signal connection.

[0006] Further, the second outer connecting pipeline is provided with a monitoring pipeline at the outlet end of the gas capacity, and a water column pressure gauge is installed at the end of the monitoring pipeline.

[0007] Further, a negative pressure switch valve and a vacuum valve are installed on the negative pressure connecting pipeline, the vacuum valve is arranged at the end of the negative pressure connecting pipeline, and the vacuum pump is arranged between the vacuum valve and the negative pressure switch valve.

[0008] Further, one end of the positive pressure connecting pipeline is communicated between the inlet pressure regulating valve and the pressure sensor of the first outer connecting pipeline, and a second one-way flow regulating valve is installed on the positive pressure connecting pipeline.

[0009] Further, a first one-way flow regulating valve is also provided on the second outer connecting pipeline.

[0010] Further, a positive pressure valve is installed on the first outer connecting pipeline, and the positive pressure valve is installed between the two communication ports of the first outer connecting pipeline and the positive pressure connecting pipeline.

[0011] Further, an inlet switch valve is installed at the starting end of the first outer connecting pipeline, and the first outer connecting pipeline is communicated with the high-pressure gas supply device through the inlet switch valve.

[0012] Further, a pressure sensor is installed on the second outer connecting pipeline, and the pressure sensor is communicated with the control module.

[0013] Further, a gas filtering device is provided at the inlet end of the first outer connecting pipeline.

[0014] Further, the gas filtering device is a mechanical filter, an adsorption filter or a coagulation filter.

[0015] The beneficial effects of the technical scheme are as follows: by setting the air container, the detection module and the control module, setting the air inlet pressure regulating valve in the first outer connecting pipeline and configuring the air inlet pressure gauge and the pressure sensor before and after the air inlet pressure regulating valve, the pressure can be accurately regulated, controlled and monitored; the parallel positive pressure connecting pipeline is installed with the inlet flowmeter, the second outer connecting pipeline is provided with the outlet flowmeter, the leakage amount and the sensitivity of the breathing valve in the closed state under different air flow and pressure changes of the air container under the calibrated and detected pressure value can be measured and analyzed, so that the comprehensive performance of the closing and opening of the breathing valve is comprehensively evaluated. The first outer connecting pipeline is connected with the negative pressure connecting pipeline and installed with the vacuum pump, the pressure change of the container due to various factors can be simulated, the opening and closing performance of the breathing valve under the positive pressure and negative pressure threshold values can be effectively detected, the performance of the breathing valve under different working conditions is difficult to be comprehensively and accurately evaluated by the traditional single pressure test, and the accuracy and reliability of the breathing valve detection are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical schemes in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The system principle diagram of the present application.

[0018] The drawings are explained as follows: 1-air container, 2-detection module, 3-control module, 4-first outer connecting pipeline, 5-second outer connecting pipeline, 6-gas filtering device, 7-air inlet on-off valve, 8-air inlet pressure regulating valve, 9-air inlet pressure gauge, 10-pressure sensor, 11-positive pressure valve, 12-first one-way flow regulating valve, 13-outlet flowmeter, 14-positive pressure connecting pipeline, 15-second one-way flow regulating valve, 16-inlet flowmeter, 18-negative pressure connecting pipeline, 19-vacuum pump, 20-vacuum valve, 21-negative pressure on-off valve, 22-monitoring pipeline, 23-water column pressure gauge, 24-pressure sensor. DETAILED DESCRIPTION

[0019] The technical schemes of the present application will be described in detail below in combination with the embodiments. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0020] In the description of the utility model, need understanding is, the term "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and so on indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not the indication or implicit of the indicated device or element must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0021] In addition, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise expressly specifically limited. In addition, the terms "mounting", "connected", "connected" should be broadly understood, for example, can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Example 1

[0023] As Figure 1The utility model provides a kind of breathing valve detection system, including gas capacity 1, detection module 2 and control module 3, the top of gas capacity 1 is equipped with the breathing valve for being detected, detection module 2 includes first outer connecting pipeline 4 and second outer connecting pipeline 5 respectively with gas capacity 1 communication, the starting end of first outer connecting pipeline 4 is equipped with inlet valve 7, and first outer connecting pipeline 4 is communicated with high-pressure gas supply device by inlet valve 7.

[0024] First outer connecting pipeline 4 is also communicated with negative pressure connecting pipeline 18, and vacuum pump 19, negative pressure switch valve 21 and vacuum valve 20 are installed on negative pressure connecting pipeline 18;Vacuum valve 20 is arranged at the end of negative pressure connecting pipeline 18, vacuum pump 19 is arranged between vacuum valve 20 and negative pressure switch valve 21, and negative pressure switch valve 21 is used to open and close negative pressure connecting pipeline 18.

[0025] Second outer connecting pipeline 5 is provided with monitoring pipeline 22 at the outlet end of gas capacity 1, and water column pressure gauge 23 is installed at the end of monitoring pipeline 22, to observe the opening and closing pressure value of the positive pressure test of the breathing valve.

[0026] One end of positive pressure connecting pipeline 14 is communicated between inlet pressure regulating valve 8 and pressure sensor 10 of first outer connecting pipeline 4, and second one-way flow regulating valve 15 is installed on positive pressure connecting pipeline 14, to regulate the inlet flow, control the size of inlet leakage;First one-way flow regulating valve 12 is also provided on second outer connecting pipeline 5, to regulate the return flow, control the size of outlet leakage.

[0027] Pressure sensor 24 is also installed on second outer connecting pipeline 5, and pressure sensor 24 is used to display the pressure value of test return port. Inlet flow meter 16, outlet flow meter 13, vacuum pump 19 and pressure sensor 24 are all signal connected with control module 3.

[0028] In order to avoid the impurities in the compressed air into the pipeline, the scheme is provided with a filter device 6 at the inlet end of the first outer connecting pipeline 4, which can be a mechanical filter, an adsorption filter or a condensation filter.

[0029] The test steps of the detection system for the breathing valve are as follows:

[0030] First, close all valves in the detection module 2, connect the gas inlet of the first outer connecting pipeline 4 to the high-pressure gas supply device, and connect the test outlet and the test return of the detection module 2 to the gas container 1, that is, the first outer connecting pipeline 4 and the second outer connecting pipeline 5 are respectively communicated with the gas container 1, and then the test is started.

[0031] I. Positive pressure test

[0032] First, slowly open the gas inlet switch valve 7 on the first outer connecting pipeline 4 to input high-pressure gas into the system, stop rotating the gas inlet switch valve 7 when the gas inlet pressure gauge 9 reaches the desired pressure value, and then adjust the gas inlet pressure regulating valve 8 to observe the pressure sensor 10, stop rotating the gas inlet pressure regulating valve 8 when the pressure reaches the test pressure value. Slowly open the positive pressure valve 11 and slowly rotate it until the sound of the measured breathing valve exhaling is heard (the opening pressure is reached), confirm that the value should be within the set value (opening) pressure range, observe that the inlet flowmeter 16 and the outlet flowmeter 13 should have basically consistent readings and a large amount, and then slowly rotate the gas inlet pressure regulating valve 8 (to 90% of the opening pressure). It should be observed that the valve is in a closed state, and the readings of the two flowmeters should be observed to be sharply reduced. Record the pressure sensor 24, flowmeter readings and ambient temperature, and adjust the breathing valve angle to 0°, 90° and 180° respectively according to the standard requirements. Record the values each time the angle is adjusted. Collect three values for each angle, and finally obtain nine values. The average of the nine values is the positive pressure value (opening and closing) of the test. The difference between the two flowmeters in the closed state is the leakage of the breathing valve.

[0033] II. Negative pressure test

[0034] Turn on the vacuum pump 19 switch, and then slowly open the negative pressure switch valve 21 and rotate it until the sound of the measured breathing valve exhaling is heard. Confirm that the value should be within the standard range. Record the pressure, and adjust the breathing valve angle to 0°, 90° and 180° respectively according to the standard requirements. Record three values each time the angle is adjusted, and finally obtain nine values. The average of the nine values is the negative pressure value of the test.

[0035] After the test is completed, compare the recorded pressure, flow and ambient temperature data with the set data provided by the breathing valve manufacturer, and the difference should be within the allowable range. After the pressure test of the breathing valve is completed, open the unloading switch valve of the entire system to release the pressure of the system pipeline, remove the breathing valve, and the detection is completed.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A respiratory valve detection system, characterized by, The device comprises a gas container, a detection module and a control module, a breathing valve for detection is installed on the gas container, the detection module comprises a first external connection pipeline and a second external connection pipeline which are respectively communicated with the gas container, an air inlet pressure regulating valve is installed on the first external connection pipeline, an air inlet pressure gauge and a pressure sensor are respectively arranged at the two ends of the air inlet pressure regulating valve on the first external connection pipeline, a positive pressure connection pipeline is connected in parallel between the air inlet pressure regulating valve and the inlet of the gas container on the first external connection pipeline, an inlet flow meter is arranged on the positive pressure connection pipeline, an outlet flow meter is arranged on the second external connection pipeline; a negative pressure connection pipeline is further connected on the first external connection pipeline, a vacuum pump is installed on the negative pressure connection pipeline; the inlet flow meter, the outlet flow meter and the vacuum pump are signal connected with the control module.

2. The respiratory valve detection system of claim 1, wherein, A monitoring pipeline is arranged at the outlet end of the gas container on the second external connection pipeline, and a water column pressure gauge is installed at the end of the monitoring pipeline.

3. The respiratory valve detection system of claim 1, wherein, A negative pressure switch valve and a vacuum valve are installed on the negative pressure connection pipeline, the vacuum valve is arranged at the end of the negative pressure connection pipeline, and the vacuum pump is arranged between the vacuum valve and the negative pressure switch valve.

4. The respiratory valve detection system of claim 1, wherein, One end of the positive pressure connection pipeline is communicated between the air inlet pressure regulating valve and the pressure sensor of the first external connection pipeline, and a second one-way flow regulating valve is installed on the positive pressure connection pipeline.

5. The respiratory valve detection system of claim 1, wherein, A first one-way flow regulating valve is further arranged on the second external connection pipeline.

6. The respiratory valve detection system of claim 1, wherein, A positive pressure valve is installed on the first external connection pipeline, and the positive pressure valve is installed between the two communication ports of the first external connection pipeline and the positive pressure connection pipeline.

7. The respiratory valve detection system of claim 1, wherein, An air inlet switch valve is installed at the starting end of the first external connection pipeline, and the first external connection pipeline is communicated with a high-pressure gas supply device through the air inlet switch valve.

8. The respiratory valve detection system of claim 1, wherein, A pressure sensor is installed on the second external connection pipeline, and the pressure sensor is communicated with the control module.

9. The respiratory valve detection system of claim 1, wherein, A gas filter is arranged at the inlet end of the first external connection pipeline.

10. The respiratory valve detection system of claim 9, wherein, The gas filter is a mechanical filter, an adsorption filter or a coagulation filter.

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