CN203705115U - Deflector membrane-type differential pressure sensor protective device - Google Patents
Deflector membrane-type differential pressure sensor protective device Download PDFInfo
- Publication number
- CN203705115U CN203705115U CN201420093143.7U CN201420093143U CN203705115U CN 203705115 U CN203705115 U CN 203705115U CN 201420093143 U CN201420093143 U CN 201420093143U CN 203705115 U CN203705115 U CN 203705115U
- Authority
- CN
- China
- Prior art keywords
- pressure
- differential pressure
- switch
- pressure sensor
- relay control
- 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.)
- Expired - Lifetime
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
A deflector membrane-type differential pressure sensor protective device relates to the field of an electronic technology. The protective device comprises a pressure sensor, a differential pressure gauge, a relay control switch, on-off switches, a pressure protective switch and a pump for supplying liquid to a deflector chamber. The pressure sensor is used for measuring pressure at two ends of the deflector chamber. The differential pressure gauge and the pressure protective switch are respectively connected with the pressure sensor. The on-off switches, the pressure protective switch and the relay control switch are connected in series and then connected in parallel with the differential pressure gauge. The relay control switch is connected with the pump for supplying liquid to the deflector chamber and is used for controlling start and stop of the pump for supplying liquid to the deflector chamber. According to the utility model, a threshold value is set for the pressure protective switch. When differential pressure at two ends of the pressure sensor exceeds the set threshold value, the pressure protective switch is disconnected such that no current passes through the relay control switch. Power at two ends of the deflector chamber is timely cut off. Pressure is prevented from further rising. Thus, a differential pressure sensor is protected.
Description
Technical field
The utility model relates to electronic technology field, is specially a kind of guide instrument membrane type differential pressure pickup protective device.
Background technology
In the test of pressure break indoor test propping agent flow conductivity, diversion chamber's front and back end pressure differential test result directly affects the levels of precision of propping agent flow conductivity test result.The test of pressure reduction is that the pressure differential by measuring membrane type differential pressure pickup both sides obtains, in process of the test, stop up the hole of propping agent due to the residue in fracturing liquid rubber-breaking liquid, cause pressure reduction to become large, in process of the test, may occur that pressure rises suddenly, cause membrane type differential pressure pickup impaired.
Aspect guide instrument differential pressure security, more do not studying at present, in experimentation, after sensor damages, can only change, wasting reasearch funds and time.
Utility model content
The purpose of this utility model is to provide a kind of guide instrument membrane type differential pressure pickup protective device that can effectively prevent that differential pressure pickup from damaging.
The technical scheme that realizes above-mentioned purpose is: guide instrument membrane type differential pressure pickup protective device, it is characterized in that: comprise pressure transducer, differential pressure indicator, relay control switch, point, combination switch, pressure-head switch and be the pump of diversion chamber's feed flow, described pressure transducer is used for measuring diversion chamber's pressure at two ends, described differential pressure indicator, pressure-head switch is connected with pressure transducer respectively, described point, combination switch, in parallel with differential pressure indicator after series connection between pressure-head switch and relay control switch, described relay control switch is connected with the pump for diversion chamber's feed flow, for controlling the start and stop into the pump of diversion chamber's feed flow.
The utility model is by setting a threshold value to pressure-head switch; in the time that the pressure reduction at pressure transducer two ends exceedes the threshold value of setting; pressure-head switch disconnects; making does not have electric current to pass through in relay control switch; the power of realizing diversion chamber two ends cuts off in time; avoid pressure further to go up, protected differential pressure pickup.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises pressure transducer 1, differential pressure indicator 2, relay control switch 3, point, combination switch 4, 5, pressure-head switch 6 and be the pump 7 of diversion chamber's 8 feed flows, pressure transducer 1 is for measuring diversion chamber's 8 pressure at two ends, described differential pressure indicator 2, pressure-head switch 6 is connected with pressure transducer 1 respectively, described point, combination switch 4, 5, in parallel with differential pressure indicator 2 after series connection between pressure-head switch 6 and relay control switch 3, described relay control switch 3 is connected with the pump 7 for diversion chamber's 8 feed flows, for controlling the start and stop into the pump 7 of diversion chamber's 8 feed flows.
When experiment starts; press combination switch 5; for the pump 7 of diversion chamber's 8 feed flows obtains electric work; in the time that the pressure reduction at pressure transducer 1 two ends exceedes the threshold value of setting, pressure-head switch 6 disconnects, and making does not have electric current to pass through in relay control switch 3; cut off the power supply by the pump 7 for diversion chamber's 8 feed flows of the control of relay control switch 3; thereby make as the pump 7 of diversion chamber's 8 feed flows quits work, diversion chamber's 8 two ends pressure reduction no longer rise, reach the effect of protection pressure transducer 1.
Claims (1)
1. guide instrument membrane type differential pressure pickup protective device, it is characterized in that: comprise pressure transducer, differential pressure indicator, relay control switch, point, combination switch, pressure-head switch and be the pump of diversion chamber's feed flow, described pressure transducer is used for measuring diversion chamber's pressure at two ends, described differential pressure indicator, pressure-head switch is connected with pressure transducer respectively, described point, combination switch, in parallel with differential pressure indicator after series connection between pressure-head switch and relay control switch, described relay control switch is connected with the pump for diversion chamber's feed flow, for controlling the start and stop into the pump of diversion chamber's feed flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093143.7U CN203705115U (en) | 2014-03-03 | 2014-03-03 | Deflector membrane-type differential pressure sensor protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093143.7U CN203705115U (en) | 2014-03-03 | 2014-03-03 | Deflector membrane-type differential pressure sensor protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705115U true CN203705115U (en) | 2014-07-09 |
Family
ID=51055537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420093143.7U Expired - Lifetime CN203705115U (en) | 2014-03-03 | 2014-03-03 | Deflector membrane-type differential pressure sensor protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705115U (en) |
-
2014
- 2014-03-03 CN CN201420093143.7U patent/CN203705115U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203705115U (en) | Deflector membrane-type differential pressure sensor protective device | |
| CN204523724U (en) | Mask rinse water feed system | |
| CN103950070A (en) | Electric saw with water cooling function | |
| CN104514706A (en) | Alarm device for submersible pump | |
| MX346836B (en) | Hydraulic device for driving oil well pump. | |
| CN107035963A (en) | Compressed air reservoir warning device | |
| CN204738952U (en) | Reation kettle automatic protection device of pump of unloading | |
| CN203925831U (en) | A kind of novel electric fuel punp protection mechanism | |
| CN201404847Y (en) | Water-interruption protector of wet grinding machine | |
| CN102734918A (en) | Electric water heater capable of preventing dry burning of heating tube and cutting off power under situation of low water pressure | |
| CN103388349A (en) | Automatic water supplying control system | |
| CN205260284U (en) | Water level liquid level automatic control device | |
| CN205331685U (en) | Pipe fitting is led directly to in electric smelting | |
| CN204342420U (en) | A kind of material-compound tank quantitative water adding device | |
| CN204226219U (en) | A kind of pump equipment with current-limiting protection function | |
| CN203627174U (en) | Protection system for submersible pump for well | |
| CN204646813U (en) | The relief circuit valve that a kind of system pressure is stable | |
| CN205136059U (en) | Anhydrous shutdown protection device of electric centrifugal pump | |
| CN204646617U (en) | A kind of protective gear of reverse-osmosis treated mesohigh pump | |
| CN103334912B (en) | Pressure gauge with electric contact control circuit | |
| CN203031079U (en) | Electrode life detection control device | |
| CN202468261U (en) | Protective device for submersible pump of sewage treatment system | |
| CN202585280U (en) | Digital display air switch | |
| CN204716518U (en) | Electric diaphragm pump protective system | |
| CN205535059U (en) | Compressed -air storage tank alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |