CN107050983A - A kind of double knock pressure difference indicator - Google Patents
A kind of double knock pressure difference indicator Download PDFInfo
- Publication number
- CN107050983A CN107050983A CN201710387551.1A CN201710387551A CN107050983A CN 107050983 A CN107050983 A CN 107050983A CN 201710387551 A CN201710387551 A CN 201710387551A CN 107050983 A CN107050983 A CN 107050983A
- Authority
- CN
- China
- Prior art keywords
- pressure difference
- difference indicator
- magnetic
- pnp
- pore
- 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
- 239000011148 porous material Substances 0.000 claims description 31
- 239000000446 fuel Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 16
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 208000033999 Device damage Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
Abstract
The present invention proposes a kind of double knock pressure difference indicator, including pressure difference indicator housing, the double knock pressure difference indicator also includes being arranged at the control circuit shell of the pressure difference indicator housing upper end and is connected to the electric plug connector of the control circuit shell side.The present invention can be told with direct visualizztion in use notifies operator rationally and sufficiently to use filter core, and reduces the maintenance cost of equipment, and stable, and alarm is accurate.
Description
Technical field
The present invention relates to plant maintenance field, more particularly to a kind of double knock pressure difference indicator.
Background technology
In the equipment of wind power generation and solar power generation, gear-box is very expensive equipment, in order to ensure gear
Case normal work is, it is necessary to install filter, and (i.e. stopping state is very tight in filter after filter element service life expires
Weight), electric signal will be sent by pressure difference indicator, reminds staff to change filter core in time, once pressure difference indicator occurs partially
In the case of difference or failure, it will result in switch false alarm or do not alarm, if changing or not changing in time in advance
Filter insert will result in no small loss, it is more likely that cause scrapping for equipment.
Found in maintenance process, the existing pressure difference indicator of in the market is all only provided with once alarming, once product loses
When spirit or alarming value are inaccurate, it is necessary to which an additional alarm point sends electric signal, so makes in the equipment of high value
With with maintenance during, can loss and energy consumption reduce.
Therefore, we are necessary to improve such a structure, to overcome drawbacks described above.
The content of the invention
It is an object of the invention to provide a kind of double knock pressure difference indicator.
The present invention is for the technical scheme that is used of its technical problem of solution：
A kind of double knock pressure difference indicator, including pressure difference indicator housing, the double knock pressure difference indicator also include setting
It is placed in the control circuit shell of the pressure difference indicator housing upper end and is connected to electrically connecting for the control circuit shell side
Plug；
The pressure difference indicator enclosure interior is hollow shape structure and its inner tip is provided with piston moving up and down, institute
State piston tip and be additionally provided with magnet steel, the pressure difference indicator surface of shell middle part is in helicitic texture, helicitic texture bottom one
Side offers fuel feed hole, and the pressure difference indicator housing bottom is provided with positioning retainer ring, between the piston and the positioning retainer ring
It is provided with spring, the positioning retainer ring and is further opened with oil outlet；
It is provided with the top of the control circuit shell inside LED light panel, the control circuit shell and also passes through neck
Two magnetic PNP switches are fixed with, electric plug connector is connected by circuit and LED light panel and two magnetic PNP switches
Connect.
Further, it is in hollow structure inside the control circuit shell；The pressure difference indicator case top is also connected with
Have and offer shape of threads through hole at the top of connecting rod, the connecting rod.
Further, the control circuit shell is anchored on pressure difference indicator housing upper end, institute by LED light panel
State LED light panel surface and offer a manhole, screw connects through LED light panel and with connecting rod screw threads for fastening
Connect.
Further, it is arranged with sealing ring outside the pressure difference indicator housing top and bottom.
Further, the LED light panel includes the LED that three kinds of colors are respectively red, yellow and green.
Further, the electric plug connector has 4~20mA simulations defeated using M12x8 core plugs as signaling interface
Go out signal.
Further, the pressure difference indicator housing lower end is also associated with the top of valve block connecting seat, the valve block connecting seat
Offer shape of threads through hole, the valve block connecting seat left and right sides offers pore one and pore two respectively, the pore one with
The inwall of pore two is also in thread-like structure, and the pressure difference indicator housing is rotatably connected with the valve block connecting seat, valve block
Connecting seat shape of threads through hole correspondence pressure difference indicator housing fuel feed hole is further opened with also opening in annular oil-feed tank, annular oil-feed tank
Provided with oil-feed perforation, oil-feed perforation and the formation path of pore one；
Valve block connecting seat shape of threads through hole correspondence pressure difference indicator housing oil outlet lower end also offers annular and goes out oil groove,
Annular goes out in oil groove to be further opened with fuel-displaced perforation, fuel-displaced perforation and the formation path of pore two.
Further, two magnetic PNP switches are respectively that magnetic PNP switchs one and magnetic PNP switches two, and magnetic PNP is opened
Close one and be respectively arranged at the connecting rod left and right sides with magnetic PNP switches two, the magnetic PNP switches two are located at magnetic PNP
The upside of switch one.
Further, it is connected with the pore one at inflow pipeline, the pore two and is connected with flowline, flowline
Road is connected with filter oil-inlet end.
Fluid is delivered at valve block connecting seat pore one from inflow pipeline, and the fluid in pore one is conveyed by annular oil groove
At to pressure difference indicator housing fuel feed hole and it is delivered to oil outlet at pressure difference indicator enclosure interior, the located back-up ring of fluid and goes out
Oil, annular oil groove of the fluid again through oil outlet lower end is delivered to pore two, and fluid is delivered to filter by flowline again.
When filter interior is without under stopping state, piston normal work, LED light panel green light；When in filter
When certain stopping state occurs in portion, piston is moved up due to pressure drop, and with magnetic PNP switches one magnetic occurs for the magnet steel at piston
Coupling, magnetic PNP switches one are by being disconnected to closure, and now LED light panel amber light is bright forms first time pre-alarm, this
When reached the limit values 75%；When filter interior blocking is serious, piston is continued to move up due to pressure drop, at piston
With magnetic PNP switches two magnetic couplings effect occurs for magnet steel, and magnetic PNP switchs two by being disconnected to closure, now LED light face
Second of alarm of plate when red formation, now represents over-limit condition 100%, it is necessary to change filter element at once, otherwise
Device damage is may result in, causes equipment cisco unity malfunction, very big loss is caused.
The advantage of the invention is that：
1st, the present invention is acted on by the magnet steel at piston and the generation magnetic couplings of magnetic PNP switches one and causes amber light bright,
Form first time pre-alarm；Acted on by piston and the generation magnetic couplings of magnetic PNP switches two and cause when red, form second
Secondary alarm；Teaching process personnel observation in time and replacing filter core, are used in the equipment of high value by the way of this double knock
In maintenance process, loss and energy consumption can be preferably minimized.
2nd, pressure difference indicator housing and valve block connecting seat spin, and the sealing ring that pressure difference indicator housing upper end is arranged can be to prevent
Only fluid overflows upward；The sealing ring that pressure difference indicator housing lower end is arranged plays a part of interval fuel feed hole and oil outlet,
Avoid at fluid underflow to the oil outlet of fuel feed hole, it also avoid at fluid overflow to the fuel feed hole of oil outlet.
3rd, the screw thread mode of spinning of the present invention can effectively act as closed interval action, meanwhile, screw is passed through
LED light panel is simultaneously connected with connecting rod screw threads for fastening, causes device more to stablize in itself and firmly, improve making for device
Production cost is saved with the life-span and largely.
4th, because pressure difference indicator is used for the particularity of expensive instrument, the present invention is aobvious compared with mill run lifting in precision
Write.
5th, the present invention can be told with direct visualizztion in use notifies operator rationally and sufficiently using filter
Core, and the maintenance cost of equipment is reduced, and also it is stable, alarm is accurate；For a long time, company leader and a line are received
The consistent favorable comment of operating personnel.
Brief description of the drawings
Fig. 1 is a kind of structural representation of double knock pressure difference indicator proposed by the present invention.
Fig. 2 is valve block connecting seat sectional view.
Fig. 3 is a kind of electrical schematic diagram of double knock pressure difference indicator proposed by the present invention.
Numeral and the corresponding component title represented by letter in figure：
1st, pressure difference indicator housing 2, control circuit shell 3, electric plug connector 4, piston 5, fuel feed hole 6, positioning
Back-up ring 7, spring 8, LED light panel 9, sealing ring 10, connecting rod 11, valve block connecting seat 12, pore 1, pipe
Hole 2 14, magnetic PNP switches 1, magnetic PNP switches two
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Diagram and specific embodiment are closed, the present invention is expanded on further.
As shown in Figure 1 to Figure 3, a kind of double knock pressure difference indicator proposed by the present invention, including pressure difference indicator housing 1,
The double knock pressure difference indicator also includes control circuit shell 2 and the connection for being arranged at the upper end of pressure difference indicator housing 1
Electric plug connector 3 in control circuit shell 2 side；
It is described that hollow shape structure is in the inside of pressure difference indicator housing 1 and its inner tip is provided with piston 4 moving up and down,
The top of piston 4 is additionally provided with magnet steel, and the surface middle part of pressure difference indicator housing 1 is in helicitic texture, helicitic texture bottom
End side offers fuel feed hole 5, and the bottom of pressure difference indicator housing 1 is provided with positioning retainer ring 6, the piston 4 and the positioning
It is provided between back-up ring 6 at spring 7, the positioning retainer ring 6 and is further opened with oil outlet；
The top of control circuit shell 2, which is provided with inside LED light panel 8, the control circuit shell, also passes through card
Groove is fixed with two magnetic PNP switches, and electric plug connector 3 is opened by circuit with LED light panel 8 and two magnetic PNP
Connection connects.
Further, the inside of control circuit shell 2 is in hollow structure；The top of pressure difference indicator housing 1 also connects
Connecting rod 10 is connected to, the top of connecting rod 10 offers shape of threads through hole.
Further, the control circuit shell 2 is anchored on pressure difference indicator housing 1 by LED light panel 8
End, the surface of LED light panel 8 offers a manhole, screw through LED light panel 8 and with connecting rod 10
Screw threads for fastening is connected.
Further, sealing/9 are arranged with outside the top and bottom of pressure difference indicator housing 1.
Further, the LED light panel 10 includes the LED that three kinds of colors are respectively red, yellow and green
Lamp.
Further, the electric plug connector 3 has 4~20mA simulations defeated using M12x8 core plugs as signaling interface
Go out signal.
Further, the lower end of pressure difference indicator housing 1 is also associated with valve block connecting seat 11, the valve block connecting seat 11
Top offers shape of threads through hole, and the left and right sides of valve block connecting seat 11 offers pore 1 and pore 2 13, institute respectively
It is also in thread-like structure with the inwall of pore 2 13 to state pore 1, and the pressure difference indicator housing 1 is connected with the valve block
Seat 11 is rotatably connected, and the fuel feed hole 5 of the shape of threads through hole of valve block connecting seat 11 correspondence pressure difference indicator housing 1 is further opened with annular and entered
Oil-feed perforation, oil-feed perforation and the formation path of pore 1 are further opened with oil groove, annular oil-feed tank；
It is fuel-displaced that the oil outlet lower end of the shape of threads through hole of valve block connecting seat 11 correspondence pressure difference indicator housing 1 also offers annular
Groove, annular goes out in oil groove to be further opened with fuel-displaced perforation, fuel-displaced perforation and the formation path of pore 2 13.
Further, two magnetic PNP switches are respectively that magnetic PNP switchs one 14 and magnetic PNP switches 2 15, magnetic
PNP switches 1 and magnetic PNP switches 2 15 are respectively arranged at the left and right sides of connecting rod 10, the magnetic PNP switches two
15 are located at the upside of magnetic PNP switches 1.
Further, it is connected with the pore 1 at inflow pipeline, the pore 2 13 and is connected with flowline, is gone out
Oil-piping is connected with filter oil-inlet end.
Fluid is delivered at valve block connecting seat pore one from inflow pipeline, and the fluid in pore one is conveyed by annular oil groove
At to pressure difference indicator housing fuel feed hole and it is delivered to oil outlet at pressure difference indicator enclosure interior, the located back-up ring of fluid and goes out
Oil, annular oil groove of the fluid again through oil outlet lower end is delivered to pore two, and fluid is delivered to filter by flowline again.
When filter interior is without under stopping state, piston normal work, LED light panel green light；When in filter
When certain stopping state occurs in portion, piston is moved up due to pressure drop, and with magnetic PNP switches one magnetic occurs for the magnet steel at piston
Coupling, magnetic PNP switches one are by being disconnected to closure, and now LED light panel amber light is bright forms first time pre-alarm, this
When reached the limit values 75%；When filter interior blocking is serious, piston is continued to move up due to pressure drop, at piston
With magnetic PNP switches two magnetic couplings effect occurs for magnet steel, and magnetic PNP switchs two by being disconnected to closure, now LED light face
Second of alarm of plate when red formation, now represents over-limit condition 100%, it is necessary to change filter element at once, otherwise
Device damage is may result in, causes equipment cisco unity malfunction, very big loss is caused.
The present invention is acted on by the magnet steel at piston and the generation magnetic couplings of magnetic PNP switches one and causes amber light bright, shape
Into first time pre-alarm；Acted on by piston and the generation magnetic couplings of magnetic PNP switches two and cause when red, formed second
Alarm；By the way of this double knock teaching process personnel in time observation and change filter core, high value equipment use and
In maintenance process, loss and energy consumption can be preferably minimized.
Pressure difference indicator housing is spun with valve block connecting seat, and the sealing ring that pressure difference indicator housing upper end is arranged can be prevented
Fluid overflows upward；The sealing ring that pressure difference indicator housing lower end is arranged plays a part of interval fuel feed hole and oil outlet, keeps away
Exempt from fluid underflow to the oil outlet of fuel feed hole, it also avoid at fluid overflow to the fuel feed hole of oil outlet.
The screw thread mode of spinning of the present invention can effectively act as closed interval action, meanwhile, screw passes through LED
Indicate light panel and be connected with connecting rod screw threads for fastening, device is more stablized in itself and firmly, is improved the use of device
Life-span has simultaneously largely saved production cost.
Because pressure difference indicator is used for the particularity of expensive instrument, the present invention is aobvious compared with mill run lifting in precision
Write.
The present invention can be told with direct visualizztion in use notifies operator rationally and sufficiently to use filter core,
And the maintenance cost of equipment is reduced, and it is stable, alarm is accurate.
General principle, principal character and the advantages of the present invention of the present invention has 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 the simply explanation described in above-described embodiment and specification is originally
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent is defined.
Claims (9)
1. a kind of double knock pressure difference indicator, including pressure difference indicator housing (1), it is characterised in that：The double knock pressure difference refers to
Show that device also includes being arranged at the control circuit shell (2) of pressure difference indicator housing (1) upper end and is connected to the control electricity
The electric plug connector (3) of road housing (2) side；
It is hollow shape structure that the pressure difference indicator housing (1) is internal and its inner tip is provided with piston moving up and down (4),
Piston (4) top is additionally provided with magnet steel, and pressure difference indicator housing (1) the surface middle part is in helicitic texture, screw thread knot
Structure bottom side offers fuel feed hole (5), and pressure difference indicator housing (1) bottom is provided with positioning retainer ring (6), the piston
(4) spring (7) is provided between the positioning retainer ring (6), positioning retainer ring (6) place is further opened with oil outlet；
It is provided with the top of the control circuit shell (2) inside LED light panel (8), the control circuit shell and also passes through card
Groove is fixed with two magnetic PNP switches, and electric plug connector (3) passes through circuit and LED light panel (8) and two magnetic
PNP switch connections.
2. a kind of double knock pressure difference indicator according to claim 1, it is characterised in that：The control circuit shell (2)
Inside is in hollow structure；It is also associated with the top of the pressure difference indicator housing (1) at the top of connecting rod (10), the connecting rod (10)
Offer shape of threads through hole.
3. a kind of double knock pressure difference indicator according to claim 1 or 2, it is characterised in that：The control circuit shell
(2) pressure difference indicator housing (1) upper end is anchored on by LED light panel (8), LED light panel (8) surface is opened
Provided with a manhole, screw is connected through LED light panel (8) and with connecting rod (10) screw threads for fastening.
4. a kind of double knock pressure difference indicator according to claim 1, it is characterised in that：The pressure difference indicator housing
(1) sealing ring (9) is arranged with outside top and bottom.
5. a kind of double knock pressure difference indicator according to claim 1, it is characterised in that：The LED light panel
(10) LED that three kinds of colors are respectively red, yellow and green is included.
6. a kind of double knock pressure difference indicator according to claim 1, it is characterised in that：The electric plug connector (3)
Using M12x8 core plugs as signaling interface, there are 4~20mA analog output signals.
7. a kind of double knock pressure difference indicator according to claim 1, it is characterised in that：The pressure difference indicator housing
(1) lower end is also associated with offering shape of threads through hole, the valve block at the top of valve block connecting seat (11), the valve block connecting seat (11)
Connecting seat (11) left and right sides offers pore one (12) and pore two (13), the pore one (12) and the pore two respectively
(13) inwall is also in thread-like structure, and the pressure difference indicator housing (1) is rotatably connected with the valve block connecting seat (11), valve block
Connecting seat (11) shape of threads through hole correspondence pressure difference indicator housing (1) fuel feed hole (5) is further opened with annular oil-feed tank, and annular is entered
Oil-feed perforation, oil-feed perforation and pore one (12) formation path are further opened with oil groove；
It is fuel-displaced that valve block connecting seat (11) shape of threads through hole correspondence pressure difference indicator housing (1) oil outlet lower end also offers annular
Groove, annular goes out in oil groove to be further opened with fuel-displaced perforation, fuel-displaced perforation and pore two (13) formation path.
8. a kind of double knock pressure difference indicator according to claim 3, it is characterised in that：Two magnetic PNP switch difference
One (14) are switched for magnetic PNP and magnetic PNP switchs two (15), and magnetic PNP switchs one (14) and switchs two (15) point with magnetic PNP
The connecting rod (10) left and right sides is not arranged at, and the magnetic PNP switchs two (15) and is located on one (14) of magnetic PNP switches
Side.
9. a kind of double knock pressure difference indicator according to claim 7, it is characterised in that：Described (12) place of pore one spins
There is inflow pipeline, described (13) place of pore two is connected with flowline, and flowline is connected with filter oil-inlet end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387551.1A CN107050983B (en) | 2017-05-27 | 2017-05-27 | Double-alarm pressure difference indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387551.1A CN107050983B (en) | 2017-05-27 | 2017-05-27 | Double-alarm pressure difference indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107050983A true CN107050983A (en) | 2017-08-18 |
| CN107050983B CN107050983B (en) | 2022-11-08 |
Family
ID=59610073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710387551.1A Active CN107050983B (en) | 2017-05-27 | 2017-05-27 | Double-alarm pressure difference indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107050983B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588060A (en) * | 2017-10-20 | 2018-01-16 | 新乡市华航航空液压设备有限公司 | A kind of Split type electric pressure difference signal device structure |
| CN117482644A (en) * | 2024-01-03 | 2024-02-02 | 南方环境有限公司 | A ventilation adjustment mechanism for dust collecting equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234301Y (en) * | 1995-11-22 | 1996-09-04 | 陈忠 | Pressure differential signaler |
| CN2900890Y (en) * | 2006-03-08 | 2007-05-16 | 厦门福莱特滤油设备制造有限公司 | Oil filter |
| CN102698497A (en) * | 2012-06-14 | 2012-10-03 | 广州市益民饮用水技术有限公司 | Automatic diagnostic technique for complete equipment for water supply by different qualities |
| CN203002089U (en) * | 2013-01-11 | 2013-06-19 | 新乡平原航空液压设备有限公司 | Differential pressure pinger |
| CN206823338U (en) * | 2017-05-27 | 2018-01-02 | 嘉兴肯布鲁克液压科技有限公司 | A kind of double knock pressure difference indicator |
-
2017
- 2017-05-27 CN CN201710387551.1A patent/CN107050983B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234301Y (en) * | 1995-11-22 | 1996-09-04 | 陈忠 | Pressure differential signaler |
| CN2900890Y (en) * | 2006-03-08 | 2007-05-16 | 厦门福莱特滤油设备制造有限公司 | Oil filter |
| CN102698497A (en) * | 2012-06-14 | 2012-10-03 | 广州市益民饮用水技术有限公司 | Automatic diagnostic technique for complete equipment for water supply by different qualities |
| CN203002089U (en) * | 2013-01-11 | 2013-06-19 | 新乡平原航空液压设备有限公司 | Differential pressure pinger |
| CN206823338U (en) * | 2017-05-27 | 2018-01-02 | 嘉兴肯布鲁克液压科技有限公司 | A kind of double knock pressure difference indicator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588060A (en) * | 2017-10-20 | 2018-01-16 | 新乡市华航航空液压设备有限公司 | A kind of Split type electric pressure difference signal device structure |
| CN117482644A (en) * | 2024-01-03 | 2024-02-02 | 南方环境有限公司 | A ventilation adjustment mechanism for dust collecting equipment |
| CN117482644B (en) * | 2024-01-03 | 2024-03-19 | 南方环境有限公司 | A ventilation adjustment mechanism for dust collecting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107050983B (en) | 2022-11-08 |
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