CN109900472A - A kind of breather valve on-line measuring device - Google Patents
A kind of breather valve on-line measuring device Download PDFInfo
- Publication number
- CN109900472A CN109900472A CN201910171138.0A CN201910171138A CN109900472A CN 109900472 A CN109900472 A CN 109900472A CN 201910171138 A CN201910171138 A CN 201910171138A CN 109900472 A CN109900472 A CN 109900472A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- tight
- housing
- breather valve
- tank body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Abstract
A kind of breather valve on-line measuring device of the invention, including A-frame, room occurs for pressure difference, vacuum (-tight) housing and tank body to be measured equipped with breather valve, the pressure difference occurs to be equipped with rotary shaft at left and right sides of room, two rotary shafts are rotatable to be fixed on the A-frame, wherein a rotary shaft is connected with stepper motor, the stepper motor is fixed on the A-frame, the pressure difference occurs interior and sets air cavity and the piston that can slide up and down, the pressure difference occurs room and is arranged right below gas nozzle, surface is equipped with gas-tpe fitting, the gas-tpe fitting is connected with hose, the other end of the hose is connected on vacuum (-tight) housing, the vacuum (-tight) housing is adsorbed on tank body to be measured equipped on the position of breather valve.Whether the function that breather valve can be detected on active line is normal, easy to use, quick, efficient.Detection and production do not conflict, and have a very important significance to the safety in production of enterprise.
Description
Technical field
The present invention relates to tank body detection field more particularly to a kind of breather valve on-line measuring devices.
Background technique
Breather valve is a kind of safety device for guaranteeing storage tank eupnea, it can not only maintain cartridge gas pressure to balance, it is ensured that
Storage tank, from destroying, and can reduce the discharge of medium in tank to greatest extent, reduce environmental pollution in superpressure or vacuum.It is more at present
Several breather valve detection devices is to be mounted on breather valve on the Detecting data of special test room, is utilized respectively air pressure
The equipment such as contracting machine and vacuum pump provide positive/negative-pressure respectively opens breather valve, to determine the unlatching pressure outwardly and inwardly of breather valve
Power.Also there is mancarried device, although this device can take scene to, but breather valve is needed to disassemble from oil tank
Or have particular/special requirement to connecting line, therefore, the needs to breather valve on-line checking can not be met.
Breather valve all plays a crucial role safety in production and environmental protection etc. as an important safety component, right
It is also a wherein important ring, the breathing big for ownership to the inspection of breather valve in the annual test of transport of dangerous goods tank vehicle
Valve on-line measuring device and method propose increasingly higher demands, need to exempt to dismount, is convenient, fast, efficient breather valve exists
Line detector and method.
Summary of the invention
It is a primary object of the present invention to provide a kind of scheme of breather valve on-line measuring device regarding to the issue above.
To achieve the above objectives, the technical solution adopted by the present invention are as follows: a kind of breather valve on-line measuring device, a kind of breathing
Valve on-line measuring device, a kind of breather valve on-line measuring device, including A-frame, pressure difference occur room, vacuum (-tight) housing and equipped with exhaling
The tank body to be measured of valve is inhaled, the pressure difference occurs to be equipped with rotary shaft at left and right sides of room, and two rotary shafts are rotatable to be fixed on
On the A-frame, wherein a rotary shaft is connected with stepper motor, the stepper motor is fixed on the triangle branch
On frame, the pressure difference occurs interior and sets air cavity and the piston that can slide up and down, and indoor air cavity occurs for the piston and pressure difference
Wall is closed to be slided up and down, and the pressure difference occurs room and is arranged right below gas nozzle, surface equipped with gas-tpe fitting, and the gas-tpe fitting connects
It is connected to hose, the other end of the hose is connected on vacuum (-tight) housing, and the vacuum (-tight) housing is adsorbed on tank body to be measured equipped with breather valve
On position, vacuum (-tight) housing and tank body to be measured formation confined space and breather valve are located in the confined space, by changing the confined air
In gas pressure detect whether breather valve can work normally.
The internal piston is equipped at least a piece of clump weight, and the clump weight density is higher than the density of piston face material,
Such as the material sheet of piston is as No. 45 steel, then the density of material of the selection of clump weight will than No. 45 steel it is big, clump weight is
In order to generate bigger gravity in same volume, it is exactly to utilize piston gravity compressed gas that indoor pressure difference, which occurs, for pressure difference
Body increases gas pressure, and clump weight can increase reduction, and the size for needing gas differential pressure when according to detection is selected.
Annular magnetic stripe is equipped at the vacuum (-tight) housing and tank body sealing to be measured, the annular magnetic stripe, which is pressed on vacuum (-tight) housing, to be made very
Sky cover forms confined space with tank body to be measured, and the vacuum (-tight) housing is equipped with the pressure vacuum gauge for reading vacuum internal mask pressure and release
One end of the vacuum (-tight) housing air valve of gas in vacuum (-tight) housing, vacuum (-tight) housing and tank body to be measured contact is rubber material, can be occurred certain
Deformation, is adapted to the different surface shape of tank body to be measured, and annular magnetic stripe is adsorbed on tank surface to be measured.
The tank body to be measured is equipped with the tank body pressure gauge for reading tank interior pressure to be measured and discharges gas in tank body to be measured
The tank body air valve of body.
The cylindrical body or cuboid of the shape of room occurs for the pressure difference to be using plane where gas nozzle be bottom surface.
Compared with the prior art, the advantages of the present invention are as follows:
A-frame occurs room and is fixed on triangle by rotary shaft for fixing the breather valve on-line measuring device, pressure difference
On bracket, the indoor piston for being equipped with constant weight occurs for pressure difference, squeezes or stretches air by the self weight of piston, can produce positive pressure
With negative pressure, room occurs for pressure difference by step motor control, rotates 180 degree to generate extruding or stretch the effect of air, vacuum
Cover occurs to be connected between room with the hose of certain length pressure difference, vacuum (-tight) housing by the annular magnetic stripe of bottom be adsorbed in it is to be measured
It on tank body, and can be read by vacuum (-tight) housing equipped with vacuum (-tight) housing pressure gauge, when the pressure in vacuum (-tight) housing is more than certain threshold value
When range, breather valve is opened, and the intracorporal air pressure of tank changes, and tank body inside and outside differential pressure is kept constant, and is exhaled with this to detect
Inhale valve.
Breather valve can not had to remove using the present apparatus, the function of breather valve is detected on the active line of breather valve
It is whether normal, it is easy to use, quick, efficient.Detection and production do not conflict, and have highly important meaning to the safety in production of enterprise
Justice.
Detailed description of the invention
Fig. 1 is the partial sectional view of on-line checking breather valve of the present invention；
Fig. 2 is that the postrotational partial sectional view in room occurs for a kind of pressure difference of breather valve on-line measuring device；
Fig. 3 is a kind of side view of breather valve on-line measuring device.
The corresponding title of each appended drawing reference is: A-frame 1；Stepper motor 2；Room 3 occurs for pressure difference；Rotary shaft 31；Gas
Chamber 32；Piston 33；Clump weight 331；Gas nozzle 34；Gas-tpe fitting 35；Hose 4；Vacuum (-tight) housing 5；Annular magnetic stripe 51；Vacuum (-tight) housing pressure gauge
52；Vacuum (-tight) housing air valve 53；Tank body 6 to be measured；Breather valve 61；Tank body pressure gauge 62；Tank body air valve 63.
Specific embodiment
It is described below for disclosing particular content of the present invention so that those skilled in the art can be realized the present invention.It retouches below
Preferred embodiment in stating is only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
The embodiment of the present invention is a kind of breather valve on-line measuring device, a kind of breather valve on-line measuring device, including three
Room 3, vacuum (-tight) housing 5 and the tank body to be measured 6 equipped with breather valve 61 occur for angle support 1, pressure difference, and 3 left and right sides of room occurs for the pressure difference
Equipped with rotary shaft 31, two rotary shafts 31 are rotatable to be fixed on the A-frame 1, wherein a rotary shaft
31 are connected with stepper motor 2, and the stepper motor 2 is fixed on the A-frame 1, and the pressure difference occurs to set air cavity in room 3
32 and the piston 33 that can slide up and down, the pressure difference occurs that room 3 is arranged right below gas nozzle 34, surface is equipped with gas-tpe fitting
35, the gas-tpe fitting 35 is connected with hose 4, and the other end of the hose 4 is connected on vacuum (-tight) housing 5, and the vacuum (-tight) housing 5 adsorbs
On the position that tank body 6 to be measured is equipped with breather valve 61.
At least a piece of clump weight 331 is equipped with inside the piston 33,331 density of clump weight is higher than 33 surface material of piston
The density of material.
Annular magnetic stripe 51 is equipped at 6 sealing of the vacuum (-tight) housing 5 and tank body to be measured, the annular magnetic stripe 51 is pressed in vacuum (-tight) housing 5
Above so that vacuum (-tight) housing 5 and tank body to be measured form confined space, the vacuum (-tight) housing 5 is equipped with the vacuum pressure for reading vacuum internal mask pressure
The vacuum (-tight) housing air valve 53 of gas in power table 52 and release vacuum (-tight) housing.
The tank body to be measured 6 is equipped with the tank body pressure gauge 62 for reading tank interior pressure to be measured and discharges in tank body to be measured
The tank body air valve 63 of gas.
The cylindrical body or cuboid of the shape of room occurs for the pressure difference to be using plane where gas nozzle be bottom surface.
As shown in Figure 1-3, A-frame occurs room and passes through rotation for fixing the breather valve on-line measuring device, pressure difference
Axis is fixed on A-frame, and the indoor piston for being equipped with constant weight occurs for pressure difference, and the weight of piston can pass through regulating piston
Intermediate clump weight is arranged, and squeezes or stretches air by the self weight of piston, can produce positive pressure and negative pressure, according to carat uncle dragon
Equation PV=nRT, can it is known that at that same temperature, the pressure of the generation of gas is inversely proportional with its volume
PV=k is obtained, wherein k is constant, and pressure difference occurs room by step motor control, rotates 180 degree to generate extruding or stretching
The effect of air, vacuum (-tight) housing occur to be connected between room with the hose of certain length with pressure difference, the magnet that vacuum (-tight) housing passes through bottom
It is adsorbed on tank body to be measured detected, and vacuum (-tight) housing is equipped with air valve and pressure gauge, when the pressure in vacuum (-tight) housing is more than one
When determining threshold range, breather valve is opened, and the intracorporal air pressure of tank to be measured changes, and tank body inside and outside differential pressure to be measured keeps permanent
It is fixed, breather valve is detected with this.
Pressure difference occurs room one end and is equipped with gas nozzle, is connected to ambient atmosphere, acts on the air pressure perseverance that piston is located at gas nozzle one end
It is set to atmospheric pressure 1atm, before being detected, device is in Fig. 1 state, the air valve being located on vacuum (-tight) housing and tank body to be measured is opened,
Make to communicate in tank, in vacuum (-tight) housing with the air pressure in pressure difference generation room air cavity with external atmosphere pressure, constant is 1atm, hereafter closes institute
There is air valve, pressure difference is overturn by stepper motor and occurs room, piston squeezes air by the self gravity of clump weight, in the present invention
Air cavity is identical as the volume of vacuum (-tight) housing inner cavity, therefore when piston advances to state shown in Fig. 2 completely, does not consider that breather valve is opened
In the case that gas flows into tank body to be measured, gas volume is reduced into original 1/2, attainable greatest limit pressure in vacuum (-tight) housing
Power is 2atm, otherwise greatest limit pressure is 0.5atm, and the greatest limit pressure that can be generated under normal conditions depends on piston
Interior clump weight, the present invention illustrate clump weight as the iron block of 100mm thickness, and the maximum gas pressure difference that can be generated is ρIronGh, wherein h
For the thickness of iron block, it is 7702.8Pa, as 1.07atm that conversion, which can obtain the maximum gas pressure difference that can be generated, when breather valve is not switched on
When, air pressure is 1atm in tank, and breather valve both ends pressure difference is 0.07atm, about 7.091KPa, and general breather valve is required when detecting
Pressure difference be 5kPa, if there is different demands, bigger pressure difference can be generated by changing the gravity of clump weight to realize.
The step of specific detection are as follows:
One, state shown in Fig. 1 opens tank body air valve and vacuum (-tight) housing air valve, discharges air pressure；It is closed after stable gas pressure above-mentioned
Air valve.
Two, after closing air valve, rotate 180 ° of pressure differences and rooms occur, air pressure is slowly increased in vacuum (-tight) housing, until certain numerical value with
Afterwards, breather valve both ends pressure difference is more than threshold value, and breather valve is opened, when the piston comprising clump weight slowly moves, completely to Fig. 2 state
When, the pressure gauge reading difference on pressure gauge and tank body to be measured on vacuum (-tight) housing is the positive cracking pressure of breather valve；
Three, state shown in Fig. 2 opens tank body air valve and vacuum (-tight) housing air valve, discharges air pressure；It is closed after stable gas pressure above-mentioned
Air valve.
Four, after closing air valve, rotate 180 ° of pressure differences and rooms occur, air pressure is slowly reduced in vacuum (-tight) housing, until certain numerical value with
Afterwards, breather valve both ends pressure difference is more than threshold value, and breather valve is opened, when the piston comprising clump weight slowly moves, completely to Fig. 1 state
When, the pressure gauge reading difference on pressure gauge and tank body to be measured on vacuum (-tight) housing is the negative cracking pressure of breather valve.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (5)
1. a kind of breather valve on-line measuring device, including room (3), vacuum (-tight) housing (5) and equipped with exhaling occur for A-frame (1), pressure difference
Inhale the tank body to be measured (6) of valve (61), it is characterised in that: the pressure difference occurs to be equipped with rotary shaft (31) at left and right sides of room (3), and two
The rotary shaft (31) is rotatable to be fixed on the A-frame (1), wherein a rotary shaft (31) is connected with step
Into motor (2), the stepper motor (2) is fixed on the A-frame (1), and the pressure difference occurs to set air cavity in room (3)
(32) and the piston that can slide up and down (33), the pressure difference occur room (3) and are arranged right below gas nozzle (34), surface equipped with gas
Pipe fitting (35), the gas-tpe fitting (35) are connected with hose (4), and the other end of the hose (4) is connected to vacuum (-tight) housing (5)
On, the vacuum (-tight) housing (5) is adsorbed on tank body to be measured (6) equipped on the position of breather valve (61).
2. a kind of breather valve on-line measuring device according to claim 1, it is characterised in that: set inside the piston (33)
There is at least a piece of clump weight (331), clump weight (331) density is higher than the density of piston (33) surfacing.
3. a kind of breather valve on-line measuring device according to claim 1, it is characterised in that: the vacuum (-tight) housing (5) and to
It surveys at tank body (6) sealing and is equipped with annular magnetic stripe (51), the annular magnetic stripe (51) is pressed on vacuum (-tight) housing (5) so that vacuum (-tight) housing (5)
With tank body to be measured formed confined space, the vacuum (-tight) housing (5) be equipped with read vacuum internal mask pressure pressure vacuum gauge (52) and
Discharge the vacuum (-tight) housing air valve (53) of gas in vacuum (-tight) housing.
4. a kind of breather valve on-line measuring device according to claim 3, it is characterised in that: on the tank body (6) to be measured
Tank body air valve (63) equipped with gas in the tank body pressure gauge (62) and release tank body to be measured for reading tank interior pressure to be measured.
5. a kind of breather valve on-line measuring device according to claim 3, it is characterised in that: room (3) occur for the pressure difference
Shape to be using plane where gas nozzle (34) be bottom surface cylindrical body or cuboid.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171138.0A CN109900472B (en) | 2019-03-07 | 2019-03-07 | Breather valve on-line measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109900472A true CN109900472A (en) | 2019-06-18 |
| CN109900472B CN109900472B (en) | 2021-01-12 |
Family
ID=66946658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910171138.0A Active CN109900472B (en) | 2019-03-07 | 2019-03-07 | Breather valve on-line measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109900472B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780965A (en) * | 2020-08-10 | 2020-10-16 | 罗浮阀门集团有限公司 | Breather valve ventilation test device and method |
| CN116242603A (en) * | 2023-05-11 | 2023-06-09 | 山东泰阳特种设备检测科技有限公司 | Online checking device for breather valve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791631Y (en) * | 2005-02-06 | 2006-06-28 | 郭俊杰 | Breathing valve checking table |
| KR20070114249A (en) * | 2007-10-23 | 2007-11-30 | 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 |
| CN105571901A (en) * | 2015-12-10 | 2016-05-11 | 浙江省海洋水产研究所 | Rotary semi-isolation type high-accuracy plankton sampling system |
| 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 |
| CN106224631A (en) * | 2016-07-19 | 2016-12-14 | 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 |
-
2019
- 2019-03-07 CN CN201910171138.0A patent/CN109900472B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791631Y (en) * | 2005-02-06 | 2006-06-28 | 郭俊杰 | Breathing valve checking table |
| KR20070114249A (en) * | 2007-10-23 | 2007-11-30 | 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 |
| CN105571901A (en) * | 2015-12-10 | 2016-05-11 | 浙江省海洋水产研究所 | Rotary semi-isolation type high-accuracy plankton sampling system |
| CN106224631A (en) * | 2016-07-19 | 2016-12-14 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 张建儿: "一种带打印输出的呼吸阀检测装置设计", 《无线互联科技》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780965A (en) * | 2020-08-10 | 2020-10-16 | 罗浮阀门集团有限公司 | Breather valve ventilation test device and method |
| 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 |
| CN116242603A (en) * | 2023-05-11 | 2023-06-09 | 山东泰阳特种设备检测科技有限公司 | Online checking device for breather valve |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109900472B (en) | 2021-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106224631B (en) | A kind of breather valve on-line measuring device and method | |
| CN109900472A (en) | A kind of breather valve on-line measuring device | |
| CN106226000B (en) | A kind of vacuum sealing performance measurement device and method | |
| CN107289325B (en) | Automatic recovery processing device of sulfur hexafluoride | |
| JP6602852B2 (en) | Film chamber with volumetric function for gross leak detection | |
| CN203903207U (en) | Wire guide type intelligent fire breathing valve | |
| CN207556562U (en) | Environmental detection set with high leakproofness integral sensor protective cover | |
| CN205506315U (en) | Glove box gloves hunt leak on line device and glove box | |
| CN105333657B (en) | A kind of refrigerant filling system that can empty combustible refrigerant in time | |
| CN210136022U (en) | Gas pipeline pressure recording and leakage detecting device | |
| CN211627229U (en) | Air respirator middling pressure air duct capability test machine | |
| CN105668229B (en) | The decision method and device of corrugated case surface vacuum adsorption capacity are improved with coating process | |
| CN107202690A (en) | A kind of breather valve on-site calibration device and its application method | |
| CN210893579U (en) | Device of detectable air cooler gas tightness | |
| CN210426950U (en) | Portable flow resistance testing arrangement | |
| CN206930441U (en) | A kind of breather valve on-site calibration device | |
| CN207407067U (en) | A kind of sulfur hexafluoride automatic recovery processing device | |
| CN219675378U (en) | Storage tank breather valve detection device | |
| CN214473154U (en) | High-precision VOC detector convenient for cleaning internal inorganic impurities | |
| CN106768729A (en) | Evaporator airtight detecting apparatus | |
| CN111665031A (en) | Device and method for smoothly testing ripple movement of external oil ripple oil conservator | |
| CN207351627U (en) | The system for detecting water purification catridge air-tightness | |
| CN207215386U (en) | The detection means of axial workpiece sealing | |
| CN205066272U (en) | Refrigerant of flammable refrigerant of evacuation accessible time fills notes system | |
| JPH04187897A (en) | Backup system in case of abnormality of dry-gas seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
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 |
|
| CP03 | Change of name, title or address |