CN109900472B - Breather valve on-line measuring device - Google Patents
Breather valve on-line measuring device Download PDFInfo
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- CN109900472B CN109900472B CN201910171138.0A CN201910171138A CN109900472B CN 109900472 B CN109900472 B CN 109900472B CN 201910171138 A CN201910171138 A CN 201910171138A CN 109900472 B CN109900472 B CN 109900472B
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- 238000001514 detection method Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 6
- 230000000241 respiratory effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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Abstract
The invention discloses an online detection device for a breather valve, which comprises a triangular support, a differential pressure generating chamber, a vacuum cover and a tank body to be detected, wherein the tank body to be detected is provided with the breather valve, rotating shafts are arranged on the left side and the right side of the differential pressure generating chamber, the two rotating shafts are rotatably fixed on the triangular support, one rotating shaft is connected with a stepping motor, the stepping motor is fixed on the triangular support, an air cavity and a piston capable of sliding up and down are arranged in the differential pressure generating chamber, an air nozzle is arranged right below the differential pressure generating chamber, an air pipe joint is arranged right above the differential pressure generating chamber, the air pipe joint is connected with a hose, the other end of the hose is connected to the vacuum cover. Whether the function of the breather valve is normal can be detected on a working line, and the breather valve is convenient, rapid and efficient to use. The detection and the production are not conflicted, and the method has very important significance for the safety production of enterprises.
Description
Technical Field
The invention relates to the field of tank body detection, in particular to an online detection device for a breather valve.
Background
The breather valve is a safety device for ensuring the normal breathing of the storage tank, not only can maintain the air pressure balance of the storage tank, ensure that the storage tank is prevented from being damaged in overpressure or vacuum, but also can reduce the discharge of the medium in the tank to the maximum extent and reduce the environmental pollution. At present, in most breather valve detection devices, a breather valve is mounted on a detection test bed of a specific test room, and positive pressure and negative pressure are respectively provided by an air compressor, a vacuum pump and other equipment to open the breather valve, so that the outward opening pressure and the inward opening pressure of the breather valve are determined. There are portable devices, but although these devices can be brought to the site, they require the breather valve to be detached from the tank or have special requirements for the connection line, and therefore, the need for online detection of the breather valve cannot be met.
The breather valve is used as an important safety part, plays a vital role in safety production, environmental protection and the like, is an important part in the annual inspection of tank vehicles for transporting dangerous goods, provides higher and higher requirements for the breather valve online detection device and method with large retention capacity, and needs the breather valve online detection device and method which are free of disassembly and assembly, convenient, quick and efficient.
Disclosure of Invention
The main object of the present invention is to provide a solution for an online detection device of a respiratory valve.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a breather valve on-line measuring device, includes A-frame, pressure differential generation room, vacuum mask and the jar body that awaits measuring that is equipped with the breather valve, the pressure differential generation room left and right sides is equipped with the rotation axis, two the rotation axis is rotatable to be fixed on the A-frame, one of them rotation axis is connected with step motor, step motor fixes on the A-frame, the indoor air cavity and the piston that can slide from top to bottom of establishing of pressure differential generation, the airtight up-and-down slip of air cavity wall in piston and the pressure differential generation room, be equipped with the air cock under the pressure differential generation room, be equipped with the trachea joint directly over, the trachea joint is connected with the hose, the other end of hose is connected on the vacuum mask, the vacuum mask adsorbs on the jar body that awaits measuring is equipped with the position of breather, and detecting whether the breather valve can work normally or not by changing the gas pressure in the closed space.
At least one balancing weight is arranged inside the piston, the density of the balancing weight is higher than that of the surface material of the piston, for example, the material of the piston is 45 # steel, the density of the material selected by the balancing weight is larger than that of the 45 # steel, the balancing weight is used for generating larger gravity under the same volume condition, the pressure difference in the pressure difference generation chamber is used for compressing gas by utilizing the gravity of the piston to increase the gas pressure, the balancing weight can be increased and decreased, and the size of the gas pressure difference is selected according to the requirement in detection.
The vacuum cover and the tank body that awaits measuring are sealed and are equipped with annular magnetic stripe, annular magnetic stripe presses and covers in the vacuum and make the vacuum cover and the tank body that awaits measuring form airtight space, be equipped with the vacuum pressure table that reads the vacuum cover internal pressure and the vacuum cover pneumatic valve of gaseous in the release vacuum cover on the vacuum cover, the one end of the contact of the tank body that awaits measuring of vacuum cover and the tank body that awaits measuring is the rubber material, can take place certain deformation, can adapt to the different surface shapes of the tank body that awaits measuring, and annular magnetic stripe adsorbs on.
And the tank body to be tested is provided with a tank body pressure meter for reading the internal pressure of the tank body to be tested and a tank body air valve for releasing the gas in the tank body to be tested.
The shape of the pressure difference generating chamber is a cylinder or a cuboid with the plane of the air tap as the bottom surface.
Compared with the prior art, the invention has the advantages that:
a triangular support is used for fixing the breather valve on-line detection device, a pressure difference generation chamber is fixed on the triangular support through a rotating shaft, a piston with a certain weight is arranged in the pressure difference generation chamber, the piston extrudes or stretches air through the dead weight of the piston, positive pressure and negative pressure can be generated, the pressure difference generation chamber is controlled through a stepping motor, the piston rotates 180 degrees to generate the effect of extruding or stretching air, a hose with a certain length is connected between a vacuum cover and the pressure difference generation chamber, the vacuum cover is adsorbed on a tank body to be detected through an annular magnetic strip at the bottom, and can be read through a vacuum cover pressure gauge arranged on the vacuum cover, when the pressure in the vacuum cover exceeds a certain threshold range, the breather valve is opened, the air pressure in the tank body changes, and the pressure difference inside and outside the tank.
The breather valve detection device can detect whether the function of the breather valve is normal or not on the working line of the breather valve without detaching the breather valve, and is convenient, rapid and efficient to use. The detection and the production are not conflicted, and the method has very important significance for the safety production of enterprises.
Drawings
FIG. 1 is a partial cross-sectional view of an on-line test breather valve of the present invention;
FIG. 2 is a partial cross-sectional view of a respiratory valve on-line measuring device after rotation of a differential pressure generating chamber;
fig. 3 is a side view of an on-line detection device for a respiratory valve.
The names corresponding to the respective reference numerals are: a triangular bracket 1; a stepping motor 2; a differential pressure generation chamber 3; a rotating shaft 31; an air cavity 32; a piston 33; a weight 331; an air tap 34; a gas pipe joint 35; a hose 4; a vacuum housing 5; an annular magnetic stripe 51; a vacuum cup pressure gauge 52; a vacuum hood air valve 53; a tank body 6 to be tested; a breather valve 61; a tank pressure gauge 62; a tank air valve 63.
Detailed Description
The following description is presented to disclose the invention in order to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
The embodiment of the invention relates to an online detection device for a breather valve, which comprises a triangular bracket 1, a differential pressure generating chamber 3, a vacuum cover 5 and a tank body 6 to be detected, wherein the tank body 6 is provided with a breather valve 61, the left side and the right side of the differential pressure generating chamber 3 are provided with rotating shafts 31, the two rotating shafts 31 are rotatably fixed on the triangular support 1, one of the rotating shafts 31 is connected with a stepping motor 2, the stepping motor 2 is fixed on the triangular support 1, an air cavity 32 and a piston 33 capable of sliding up and down are arranged in the differential pressure generating chamber 3, an air nozzle 34 is arranged right below the differential pressure generating chamber 3, an air pipe joint 35 is arranged right above the differential pressure generating chamber, the air pipe joint 35 is connected with a hose 4, the other end of the hose 4 is connected to a vacuum cover 5, and the vacuum cover 5 is adsorbed on the position of the tank body 6 to be tested, which is provided with a breather valve 61.
At least one piece of weight 331 is arranged inside the piston 33, and the density of the weight 331 is higher than that of the surface material of the piston 33.
The sealing position of the vacuum cover 5 and the tank body 6 to be tested is provided with an annular magnetic strip 51, the annular magnetic strip 51 is pressed on the vacuum cover 5, so that the vacuum cover 5 and the tank body to be tested form a closed space, and the vacuum cover 5 is provided with a vacuum pressure gauge 52 for reading the pressure in the vacuum cover and a vacuum cover air valve 53 for releasing the gas in the vacuum cover.
And the tank body 6 to be tested is provided with a tank body pressure gauge 62 for reading the internal pressure of the tank body to be tested and a tank body air valve 63 for releasing the gas in the tank body to be tested.
The shape of the pressure difference generating chamber is a cylinder or a cuboid with the plane of the air tap as the bottom surface.
As shown in fig. 1-3, a triangular bracket is used to fix the online detection device for the respiratory valve, a differential pressure generating chamber is fixed on the triangular bracket through a rotating shaft, a piston with a certain weight is arranged in the differential pressure generating chamber, the weight of the piston can be set through adjusting a balancing weight in the middle of the piston, air is extruded or stretched through the self weight of the piston, positive pressure and negative pressure can be generated, it can be known from the krabbelon equation p.v.. n.r.t, the pressure intensity generated by the gas is inversely proportional to the volume of the gas under the same temperature, p.v.. k, wherein k is a constant, the differential pressure generating chamber is controlled by a stepping motor, the differential pressure generating chamber rotates 180 degrees to generate the effect of extruding or stretching the air, a hose with a certain length is connected between a vacuum cover and the differential pressure generating chamber, the vacuum cover is adsorbed on a detected tank to be detected through a magnet at the bottom, and, when the pressure in the vacuum cover exceeds a certain threshold range, the breather valve is opened, the air pressure in the tank body to be detected changes, and the pressure difference between the inside and the outside of the tank body to be detected is kept constant, so that the breather valve is detected.
One end of the differential pressure generating chamber is provided with an air nozzle which is communicated with the external atmosphere, the air pressure acting on one end of the piston, which is positioned at the air nozzle, is constant to 1atm, before detection, the device is in the state shown in figure 1, the air valves positioned on the vacuum cover and the tank body to be detected are opened, the air pressure in the tank, the vacuum cover and the air cavity of the differential pressure generating chamber are communicated with the external atmosphere and is constant to 1atm, all the air valves are closed, the differential pressure generating chamber is overturned by the stepping motor, the air is extruded by the piston through the self gravity of the balancing weight, the volume of the air cavity and the volume of the inner cavity of the vacuum cover are the same, therefore, when the piston completely moves to the state shown in figure 2, the volume of the air is reduced to the original 1/2, the maximum limit pressure which can be reached in theThe limit pressure is 0.5atm, the maximum limit pressure which can be generated under the normal condition depends on the balancing weight in the piston, the balancing weight is an iron block with the thickness of 100mm in the invention, and the maximum pressure difference which can be generated is rhoIrongh, wherein h is the thickness of the iron block, the maximum pressure difference which can be generated by conversion is 7702.8Pa, namely 1.07atm, when the breather valve is not opened, the pressure in the tank is 1atm, the pressure difference at two ends of the breather valve is 0.07atm and is about 7.091KPa, the pressure difference required by the detection of a common breather valve is 5kPa, if different requirements exist, the generation of larger pressure difference can be realized by changing the gravity of the balancing weight.
The specific detection steps are as follows:
firstly, opening a tank body air valve and a vacuum cover air valve in the state shown in figure 1 to release air pressure; and closing the air valve after the air pressure is stable.
After the air valve is closed, rotating the air valve by 180 degrees to form a differential pressure generation chamber, slowly increasing the air pressure in the vacuum cover until the differential pressure at two ends of the breather valve exceeds a threshold value after a certain numerical value, opening the breather valve, and when a piston containing a balancing weight slowly moves and completely reaches the state shown in the figure 2, the reading difference between a pressure gauge on the vacuum cover and a pressure gauge on the tank body to be tested is the positive opening pressure of the breather valve;
thirdly, opening the tank body air valve and the vacuum cover air valve in the state shown in figure 2 to release air pressure; and closing the air valve after the air pressure is stable.
And fourthly, after the air valve is closed, rotating the 180-degree pressure difference generation chamber, slowly reducing the air pressure in the vacuum cover, after a certain numerical value is reached, ensuring that the pressure difference at two ends of the breather valve exceeds a threshold value, opening the breather valve, and when a piston containing a balancing weight slowly moves and completely reaches the state shown in the figure 1, and ensuring that the reading difference between a pressure gauge on the vacuum cover and a pressure gauge on the tank body to be tested is the negative opening pressure of the breather valve.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a breather valve on-line measuring device, includes that A-frame (1), pressure differential take place room (3), vacuum mask (5) and be equipped with the jar body (6) of awaiting measuring of breather valve (61), its characterized in that: the left side and the right side of the pressure difference generating chamber (3) are provided with rotating shafts (31), the two rotating shafts (31) are rotatably fixed on the triangular support (1), one rotating shaft (31) is connected with a stepping motor (2), the stepping motor (2) is fixed on the triangular support (1), an air cavity (32) and a piston (33) capable of sliding up and down are arranged in the pressure difference generating chamber (3), an air nozzle (34) is arranged right below the pressure difference generating chamber (3), an air pipe connector (35) is arranged right above the pressure difference generating chamber, the air pipe connector (35) is connected with a hose (4), the other end of the hose (4) is connected onto a vacuum cover (5), and the vacuum cover (5) is adsorbed on the position where a breather valve (61) is arranged on a tank body (6) to be detected; an annular magnetic stripe (51) is arranged at the sealing position of the vacuum cover (5) and the tank body (6) to be tested, the annular magnetic stripe (51) is pressed on the vacuum cover (5) to enable the vacuum cover (5) and the tank body to be tested to form a closed space, and a vacuum pressure gauge (52) for reading the pressure in the vacuum cover and a vacuum cover air valve (53) for releasing the air in the vacuum cover are arranged on the vacuum cover (5); a tank pressure gauge (62) for reading the internal pressure of the tank to be tested and a tank gas valve (63) for releasing gas in the tank to be tested are arranged on the tank to be tested (6); the shape of the differential pressure generating chamber (3) is a cylinder or a cuboid with the plane of the air nozzle (34) as the bottom surface.
2. The on-line detection device for the respiratory valve according to claim 1, wherein: at least one piece of balancing weight (331) is arranged inside the piston (33), and the density of the balancing weight (331) is higher than that of the surface material of the piston (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171138.0A CN109900472B (en) | 2019-03-07 | 2019-03-07 | Breather valve on-line measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171138.0A CN109900472B (en) | 2019-03-07 | 2019-03-07 | Breather valve on-line measuring device |
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| Publication Number | Publication Date |
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| CN109900472A CN109900472A (en) | 2019-06-18 |
| CN109900472B true CN109900472B (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910171138.0A Active CN109900472B (en) | 2019-03-07 | 2019-03-07 | Breather valve on-line measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111780965B (en) * | 2020-08-10 | 2022-07-29 | 罗浮阀门集团有限公司 | Breather valve ventilation test device and method |
| CN116242603B (en) * | 2023-05-11 | 2023-08-18 | 山东泰阳特种设备检测科技有限公司 | Online checking device for breather valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791631Y (en) * | 2005-02-06 | 2006-06-28 | 郭俊杰 | Breathing valve checking table |
| KR100808062B1 (en) * | 2007-10-23 | 2008-02-28 | 에스씨에스 주식회사 | Breather Valve Test Bench |
| CN201834445U (en) * | 2010-09-30 | 2011-05-18 | 中国人民解放军后勤工程学院 | Opening pressure detecting device for breather valve of oil storage tank |
| CN203231887U (en) * | 2013-03-19 | 2013-10-09 | 中国石油天然气股份有限公司 | Positive negative pressure generator for oil tank breather valve |
| CN103808501A (en) * | 2014-01-24 | 2014-05-21 | 广州永粤机电工程有限公司 | On-line calibration device for breather valve |
| CN205263667U (en) * | 2015-10-30 | 2016-05-25 | 南通市飞宇石油科技开发有限公司 | Pressure regulation control system |
| CN105571901B (en) * | 2015-12-10 | 2018-02-13 | 浙江省海洋水产研究所 | One kind half isolated high-precision planktonic organism sampling system of rotation |
| CN106224631B (en) * | 2016-07-19 | 2018-06-15 | 中国人民解放军总后勤部油料研究所 | A kind of breather valve on-line measuring device and method |
| CN206988555U (en) * | 2017-08-01 | 2018-02-09 | 山西易高煤层气有限公司 | A kind of atmospheric storage tank breather valve on-line measuring device |
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Address after: 7th Floor, Building A, No. 1588 Jiangnan Road, Yinzhou District, Ningbo City, Zhejiang Province, 315048 Patentee after: Ningbo Labor Safety Technology Service Co.,Ltd. Country or region after: China Address before: 7 / F, 1588 Jiangnan Road, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO LABOR SAFETY TECHNOLOGY SERVICE Co. Country or region before: China |