CN106504941B - A kind of differential pressure switch - Google Patents
A kind of differential pressure switch Download PDFInfo
- Publication number
- CN106504941B CN106504941B CN201611223718.2A CN201611223718A CN106504941B CN 106504941 B CN106504941 B CN 106504941B CN 201611223718 A CN201611223718 A CN 201611223718A CN 106504941 B CN106504941 B CN 106504941B
- Authority
- CN
- China
- Prior art keywords
- flow
- differential pressure
- hole
- frizzen
- switch base
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
Abstract
A kind of novel differential pressure switch.It is related to switch element field.Propose the novel differential pressure switch that a kind of delicate structure, stability are high, service life is long and operating accuracy is good.Including flow tube, switch base, movable contact spring, fixed touching plate, frizzen and differential pressure diaphragm, the switch base is fixedly connected on flow tube, and the switch base is in hollow form and towards offering flow-conveying groove on the end face of flow tube；It is equipped in the middle part of the flow tube on pressure limiting hole and the side wall of flow tube and offers the triggering hole being connected with flow-conveying groove and reset hole, the triggering hole and reset hole set up separately in the both sides in pressure limiting hole；The differential pressure diaphragm is fixedly connected at the notch of flow-conveying groove and includes the flow passage being linked together and work department.The present invention has the characteristics that stability is high, service life is long and operating accuracy is good on the whole.
Description
Technical field
The present invention relates to switch element fields, more particularly to wherein differential pressure switch improvement.
Background technology
Traditional differential pressure switch is made of two bellows chambers, by the deformation of wherein diaphragm finally to trigger the micro- of the top
Dynamic switch so that electric signal output；Wherein, the representative portion announced on June 20th, 2012 such as State Bureau is entitled
" micro-pressure differential pressure switch ", application No. is shown in the Chinese invention patent of " 201120356399.9 ".However, people are in actually making
Problems with is found that after：One, it since diaphragm generally use rubber therein is made, is often made because of ageing of rubber
The phenomenon that at pressure instability or even leak；Two, it is triggered using microswitch due to it, is also inevitably brought
Complicated, the defects of assembly difficulty is big, manufacturing cost is high and error is big.
Invention content
The present invention is in view of the above problems, propose that a kind of delicate structure, stability are high, service life is long and operating accuracy is good
Novel differential pressure switch.
The technical scheme is that：Including flow tube, switch base, movable contact spring, fixed touching plate, frizzen and differential pressure diaphragm,
The switch base is fixedly connected on flow tube, and the switch base is in hollow form and towards offering on the end face of flow tube
Chute；Be equipped in the middle part of the flow tube on pressure limiting hole and the side wall of flow tube offer the triggering hole being connected with flow-conveying groove and
Reset hole, the triggering hole and reset hole set up separately in the both sides in pressure limiting hole；
The differential pressure diaphragm is fixedly connected at the notch of flow-conveying groove and includes the flow passage being linked together and work department,
The flow passage offers the through-hole being connected to reset hole, the work between reset hole and flow-conveying groove and in the middle part of flow passage
Make portion to be located between triggering hole and flow-conveying groove and be in arc surfaced in the middle part of work department；
One end of the fixed touching plate stretches in switch base, and one end of the movable contact spring stretches in switch base and stretches into
Wear the slot bottom of the flow-conveying groove towards the side of flow-conveying groove, the frizzen to fixed touching plate and stretch in switch base with it is dynamic
It is fixedly linked in the middle part of contact, the one end of the frizzen far from movable contact spring is located at the work department of differential pressure diaphragm backwards to triggering hole
Side.
The movable contact spring stretches into one section in switch base as elastic contact blade, and one end of the frizzen is fixedly connected on elasticity
The end point at the middle part of contact, the elastic contact blade is equipped with movable contact, and the fixed touching plate, which stretches into one end in switch base and is equipped with, to be determined
Contact, the movable contact and fixed contact are oppositely arranged.
The slot bottom of the flow-conveying groove offers the seal groove concentric with the work department of differential pressure diaphragm, in the frizzen
Portion wears the slot bottom of the seal groove, and sealing shroud is arranged on the outer wall of the frizzen, and the setting of the sealing shroud swelling exists
Between seal groove and frizzen.
Internal thread is offered on the inner wall of the sealing shroud.
The triggering hole is towards offering heavy platform at the aperture of switch base.
The differential pressure diaphragm is made of metal.
When the present invention works, triggering is effectively jacked up by upward " kick " that the work department of differential pressure diaphragm passively generates upwards
Bar so that movable contact spring uplink is in contact with fixed touching plate, sends out electric signal；And matched by the restoring force of back pressure and movable contact spring itself
It closes so that " kick " resets the work department of differential pressure diaphragm downwards.The present invention can carry out sensitive, accurate control by differential pressure diaphragm
System, and can be worked normally under small hydraulic pressure environment, have the characteristics that applied widely；And wherein differential pressure diaphragm is made of metal,
To have the characteristics that service life is long, stability is good.The present invention has high stability, service life length and works on the whole
The good feature of precision.
Description of the drawings
Fig. 1 is the structural schematic diagram of this case,
Fig. 2 is the vertical view of Fig. 1,
Fig. 3 is the sectional view along A-A of Fig. 2,
Fig. 4 is the stereogram of Fig. 1,
Fig. 5 is the structural schematic diagram of differential pressure diaphragm in this case,
Fig. 6 is the stereogram of Fig. 5,
Fig. 7 is the working state schematic representation one of this case,
Fig. 8 is the working state schematic representation two of this case；
1 is flow tube in figure, and 11 be pressure limiting hole, and 12 be triggering hole, and 13 be reset hole, and 2 be switch base, and 20 be flow-conveying groove, 3
It is movable contact spring, 31 be elastic contact blade, and 32 be movable contact, and 4 be fixed touching plate, and 41 be fixed contact, and 5 be frizzen, and 50 be sealing shroud, 6
It is differential pressure diaphragm, 61 be flow passage, and 62 be work department.
Specific implementation mode
The present invention as shown in figures 1-8, including flow tube 1, switch base 2, movable contact spring 3, fixed touching plate 4, frizzen 5 and differential pressure film
Piece 6, the switch base 2 are fixedly connected on by rivet on flow tube 1, and in hollow form, (switch base includes top to the switch base 2
Open pedestal and head cover, mandril are removably connected by four columns with pedestal) and towards opening up on the end face of flow tube 1
There is flow-conveying groove 20；1 middle part of the flow tube is equipped with to offer on pressure limiting hole 11 and the side wall of flow tube 1 to be connected with flow-conveying groove 20
Logical triggering hole 12 and reset hole 13, the triggering hole 12 and reset hole 13 set up separately in the both sides in pressure limiting hole 11；
The differential pressure diaphragm 6 is fixedly connected at the notch of flow-conveying groove 20 and includes the flow passage 61 being linked together and work
Make portion 62, the flow passage 61 is between reset hole 13 and flow-conveying groove 20 and 61 middle part of flow passage offers and reset hole 13
The through-hole of connection, the work department 62 is located between triggering hole 12 and flow-conveying groove 20 and 62 middle part of work department is in arc surfaced；
One end of the fixed touching plate 4 stretches in switch base 2, one end of the movable contact spring 3 stretch in switch base 2 and
Fixed touching plate 4 is stretched to towards the side of flow-conveying groove 20, the frizzen 5 wears the slot bottom of the flow-conveying groove 20 and stretches to out
It closes the middle part in seat 2 with movable contact spring 3 to be fixedly linked, the one end of the frizzen 5 far from movable contact spring 3 is located at the work of differential pressure diaphragm 6
Make portion 62 backwards to the side for triggering hole 12.The working condition of the present invention is as Figure 7-8, and when flow proper flow will pass through always
Pressure limiting hole will then take the lead in carrying out pressure release into triggering hole, when hydraulic pressure is more than setting value, then will trigger once hydraulic pressure is excessive
Sufficiently large pressure is put aside in hole promotes the middle part of the work department of differential pressure diaphragm to generate upward " kick ", is touched to jack up upwards
Bar is sent out, finally so that movable contact spring uplink is in contact with fixed touching plate, sends out electric signal；Hereafter, being closed water by equipment is influenced, and flow is obstructed
After will reversely generate back pressure, and take the lead in being entered in flow-conveying groove by reset hole, and coordinate the restoring force of movable contact spring itself, force differential pressure
The middle part of the work department of diaphragm generates downward " kick ", so that differential pressure diaphragm and frizzen are reset to original state.
The movable contact spring 3 stretches into one section in switch base as elastic contact blade 31, and one end of the frizzen 5 is fixedly connected on
The end point at the middle part of elastic contact blade 31, the elastic contact blade 31 is equipped with movable contact 32, and the fixed touching plate 4 stretches into switch base 2
One end be equipped with fixed contact 41, the movable contact 32 and fixed contact 41 are oppositely arranged.In this way, being effectively ensured by elastic contact blade
When differential pressure diaphragm resets, movable contact and fixed contact can efficiently separate, and frizzen is resetted.
The slot bottom of the flow-conveying groove offers the seal groove concentric with the work department of differential pressure diaphragm 6, the frizzen 5
Middle part wears the slot bottom of the seal groove, and sealing shroud 50 is arranged on the outer wall of the frizzen 5,50 swelling of the sealing shroud
It is arranged between seal groove and frizzen 5.To effectively promote the leakproofness between frizzen and seal groove, that is, it is effectively ensured
The use reliability and service life of the stability and equipment entirety of equipment operation.
Internal thread is offered on the inner wall of the sealing shroud 50.In this way, may make the friction between sealing shroud and frizzen
Power is less than the frictional force between sealing shroud and seal groove, so that frizzen can smoothly do relative motion with sealing shroud, into
And ensureing equipment operational reliability.
The triggering hole 12 is towards offering heavy platform at the aperture of switch base 2.To which the work department to pressure difference diaphragm reserves
Motion space avoids movement interference.
The differential pressure diaphragm 6 is made of metal.To have the characteristics that service life is long, stability is good.
Claims (6)
1. a kind of differential pressure switch, which is characterized in that including flow tube, switch base, movable contact spring, fixed touching plate, frizzen and differential pressure film
Piece, the switch base are fixedly connected on flow tube, and the switch base is in hollow form and towards offering on the end face of flow tube
Flow-conveying groove；It is equipped in the middle part of the flow tube on pressure limiting hole and the side wall of flow tube and offers the triggering hole being connected with flow-conveying groove
And reset hole, the triggering hole and reset hole set up separately in the both sides in pressure limiting hole；
The differential pressure diaphragm is fixedly connected at the notch of flow-conveying groove and includes the flow passage being linked together and work department, described
Flow passage offers the through-hole being connected to reset hole, the work department between reset hole and flow-conveying groove and in the middle part of flow passage
It is in arc surfaced between triggering hole and flow-conveying groove and in the middle part of work department；
One end of the fixed touching plate stretches in switch base, and one end of the movable contact spring, which stretches in switch base and stretches to, determines
Towards the side of flow-conveying groove, the frizzen wears the slot bottom of the flow-conveying groove and stretches in switch base and movable contact spring contact
Middle part be fixedly linked, the one end of the frizzen far from movable contact spring is located at the work department of differential pressure diaphragm backwards to triggering the one of hole
Side.
2. a kind of differential pressure switch according to claim 1, which is characterized in that the movable contact spring stretches into one section in switch base
One end for elastic contact blade, the frizzen is fixedly connected on the middle part of elastic contact blade, and the end point of the elastic contact blade is equipped with
Movable contact, the fixed touching plate stretch into one end in switch base and are equipped with fixed contact, and the movable contact and fixed contact are oppositely arranged.
3. a kind of differential pressure switch according to claim 1, which is characterized in that the slot bottom of the flow-conveying groove offers and differential pressure
The work department of diaphragm concentric seal groove wears the slot bottom of the seal groove in the middle part of the frizzen, the frizzen
Sealing shroud is arranged on outer wall, the setting of the sealing shroud swelling is between seal groove and frizzen.
4. a kind of differential pressure switch according to claim 3, which is characterized in that offer interior spiral shell on the inner wall of the sealing shroud
Line.
5. a kind of differential pressure switch according to claim 1, which is characterized in that the triggering hole is towards at the aperture of switch base
Offer heavy platform.
6. a kind of differential pressure switch according to claim 1, which is characterized in that the differential pressure diaphragm is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223718.2A CN106504941B (en) | 2016-12-27 | 2016-12-27 | A kind of differential pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223718.2A CN106504941B (en) | 2016-12-27 | 2016-12-27 | A kind of differential pressure switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106504941A CN106504941A (en) | 2017-03-15 |
| CN106504941B true CN106504941B (en) | 2018-10-09 |
Family
ID=58334066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611223718.2A Active CN106504941B (en) | 2016-12-27 | 2016-12-27 | A kind of differential pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106504941B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2727787B1 (en) * | 1994-12-06 | 1997-01-24 | Eaton Sa Monaco | ELECTRICAL SAFETY SWITCH |
| CN202796730U (en) * | 2012-07-30 | 2013-03-13 | 汤以华 | Differential pressure switch |
| CN203631417U (en) * | 2013-12-12 | 2014-06-04 | 佟勇华 | A water flow sensing switch |
| CN203812803U (en) * | 2014-04-11 | 2014-09-03 | 张蔚 | Flow switch |
| CN205050771U (en) * | 2015-11-05 | 2016-02-24 | 佛山市吉泉净水科技有限公司 | High -voltage switch |
| CN206388644U (en) * | 2016-12-27 | 2017-08-08 | 中山市博安泰电器科技有限公司 | Novel differential pressure is switched |
-
2016
- 2016-12-27 CN CN201611223718.2A patent/CN106504941B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106504941A (en) | 2017-03-15 |
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