CN201041786Y - Pressure difference switch - Google Patents
Pressure difference switch Download PDFInfo
- Publication number
- CN201041786Y CN201041786Y CNU2007200114578U CN200720011457U CN201041786Y CN 201041786 Y CN201041786 Y CN 201041786Y CN U2007200114578 U CNU2007200114578 U CN U2007200114578U CN 200720011457 U CN200720011457 U CN 200720011457U CN 201041786 Y CN201041786 Y CN 201041786Y
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- lead
- wire
- air pressure
- seat
- cable
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Abstract
The utility model provides a pressure difference switch, which includes a hydraulic opening 3, a pneumatic opening 9, and a cable clamping seat 16. The utility model is characterized in that membrane pieces 6 are arranged on ends of the hydraulic opening 3 and the pneumatic opening 9 and are welded into a whole body; guide poles 5, 7 and springs 4, 8 are respectively arranged in the hydraulic opening 3 and the pneumatic opening 9; a fine-movement switch groupware 11 is arranged in the pneumatic opening 9, a down-lead and a down-lead agglomeration seat groupware 12 of the fine-movement switch groupware are welded together, the two ends of the down-lead agglomeration seat groupware 12 are respectively welded with a wire locking seat 13 and the pneumatic opening 9 together. A cable 20 is led into the wire locking seat 13 and is fixed by a cable clamping seat 16, and the cable 20 is welded with the lead of the down-lead agglomeration seat groupware 12. The utility model has the specifications that the measuring range of test gas and liquid has 0.040Mpa pressure difference single, the overload of the hydraulic cavity is 5MPa, the appearance sizes is less than 16 * 16 * 80mm. The design adopts double guide poles, double springs, and membrane pieces to form a spring body in two cavities, adopts the membrane pieces and the pneumatic opening sine wave copying body to bear the overloaded pressure and to restore the spring of the membrane pieces. Air pressure holes and vertical grooves are arranged in the guide poles to benefit the ventilation to restore the membrane pieces.
Description
Technical field
The utility model relates to a kind of pressure difference switch in the industrial process auto-controller table unit.
Background technology
Switch is the performance element that generally uses in the industrial process instrument for automatic control, switch partial pressure and pressure reduction.But the pressure difference switch of special requirement, as specification requirement is that the pressure difference signal, liquid of measurement gas and liquid range 0.040Mpa presses chamber overload 5MPa, overall dimensions less than 16 * 16 * 80mm, the design that does not also meet this requirement at present, structural design all has a direct impact pressure difference switch performance, stability, dynamic response characteristic.
Summary of the invention
The purpose of utility model provides a kind of pressure difference switch that satisfies above-mentioned specification requirement.
Pressure difference switch comprises hydraulic port, air pressure mouth, cable tension seat, it is characterized in that hydraulic port and air pressure mouth end have diaphragm and integrally welded, have guide pillar, spring respectively in hydraulic port, the air pressure mouth; The sensitive switch assembly places the air pressure mouth, and its lead-in wire is welded into one with card line seat and air pressure mouth respectively with lead-in wire sintering holder assembly welding, lead-in wire sintering holder assembly two ends; Cable is introduced in the card line seat and by tension seat and is fixed, the wire bonds of cable and lead-in wire sintering holder assembly.
The design's this small-sized pressure difference switch integral body can be born the pressure of 5MPa.Adopt the elastomer between two guide pillars, dual spring and two cavitys of diaphragm composition among the design, and hydraulic port, air pressure mouth are the ripple imitation body and certain angle are arranged that diaphragm and air pressure mouth sine bellows imitation body are to bear overload pressure and to make diaphragm recover elasticity; Having pressure hole and radial slot to help ventilation in the guide pillar resets diaphragm.The stability of product can be improved in diaphragm, spring, guide pillar, sensitive switch contact on same axle center, seamless residual quantity journey that guide vane end stop is adjustable.
Description of drawings
Accompanying drawing 1 is the design's a pressure difference switch structural representation;
Accompanying drawing 2 is part cutaway views of hydraulic port 3;
Accompanying drawing 3 is part cutaway views of air pressure mouth 9;
Accompanying drawing 4 is part cutaway views of guide pillar 5 or 7;
Embodiment
The mechanical structure of pressure difference switch, see Fig. 1: comprise hydraulic port 3, air pressure mouth 9, lead-in wire sintering holder assembly 12, tension seat 16, see accompanying drawing 1: its feature has guide vane end stop 2 in hydraulic port 3 one ends are equipped with protective cap 1, hydraulic port 3, guide pillar 5 and spring 4 are installed in the center, one end face of hydraulic port 3 and air pressure mouth 9 all has sine-shaped ripple, have angle γ, see Fig. 2 and Fig. 3; Isolate by diaphragm 6 between the ripple end relatively, and welding formation one, two cavitys of formation differential pressure switch have minim gap between the ripple of both ends of the surface and the diaphragm.Diaphragm 6 also has the ripple with an end same waveform as of hydraulic port 3 and air pressure mouth 9, there are guide pillar 7 and spring 8 in air pressure mouth 9 centers, sensitive switch assembly 11 and lead-in wire sintering holder assembly 12 place middle part in the air pressure mouth 9, and contact with guide pillar 7 contacts, and air pressure mouth 9 interfaces have sealing ring 10 to seal.The lead-in wire of sensitive switch assembly 11 is welded together with the lead-in wire of lead-in wire sintering holder assembly 12, sintering holder assembly 12 two ends are integrally welded with card line seat 13 and air pressure mouth 9 respectively, in the card line seat 13 seal washer 14, metal gasket 15 are arranged, cable 20 is by tension seat 16 chuckings, introduce in the card line seat 13, cable 20 is fixed on the clamp 16 by screw 17, spring pad 18 by pressure pad 19, the wire bonds of cable 20 lead-in wires and lead-in wire sintering holder assembly 12.
All there is axial gas port o at guide pillar 5,7 centers among Fig. 4, and the cylinder other end has radial slot υ, and groove υ connects the diameter of post.
During use, when air pressure mouth 9 pressure during greater than hydraulic port 3 pressure, diaphragm 6 is seen accompanying drawing 1 to recessed, make guide pillar 7 in the drive of spring 8 also to bottom offset, move when a certain amount of 11 startings of (pressure reaches 0.040MPa) sensitive switch and open (or often open become normally closed) by normally closed often becoming.Hydraulic port 3 pressure are during greater than air pressure mouth 9 (maximum 5Mpa), and diaphragm 6 raises up, and make guide pillar 5 move diaphragm 6 and the engagement of air pressure mouth 9 ripples when a certain amount of, play overload protective function.The pressure difference signal operating value can be adjusted spring 4 by guide vane end stop 2 and revise.Sensitive switch 11 signals are drawn by high-temperature cable line 20 by lead-in wire sintering holder assembly 12, and outer surface carries out silicon rubber vulcanization to be handled.
Claims (5)
1. pressure difference switch, comprise hydraulic port (3), air pressure mouth (9), cable tension seat (16), it is characterized in that hydraulic port (3) and air pressure mouth (9) end has diaphragm (6) and integrally welded, has guide pillar (5), (7), spring (4), (8) respectively in hydraulic port (3), the air pressure mouth (9); Sensitive switch assembly (11) places air pressure mouth (9), the wire bonds of sensitive switch assembly (11) lead-in wire and lead-in wire sintering holder assembly (12), and lead-in wire sintering holder assembly (12) two ends are welded into one with card line seat (13) and air pressure mouth (9) respectively; Cable (20) is introduced in the card line seat (13) and by tension seat (16) and is fixed, the wire bonds of cable (20) lead-in wire and sintering holder assembly (12).
2. pressure difference switch according to claim 1, an end face that it is characterized in that hydraulic port (3) and air pressure mouth (9) all has identical sine-shaped ripple, have angle (γ), isolate by diaphragm (6) between the ripple end relatively, constitute two cavitys of differential pressure switch; The ripple of both ends of the surface and diaphragm have minim gap between (6), and diaphragm (6) also has the ripple with an end waveform of hydraulic port (3) and air pressure mouth (9).
3. pressure difference switch according to claim 1 is characterized in that there is axial gas port (ο) at guide pillar (5), (7) center, and cylinder one end has radial slot (υ), and groove connects the diameter of post.
4. pressure difference switch according to claim 1 is characterized in that hydraulic port (3) one ends are equipped with in protective cap (1), the hydraulic port (3) guide vane end stop (2) is arranged, and guide pillar (5) and spring (4) are installed in the center; There are guide pillar (7) and spring (8) in air pressure mouth (9) center, and sensitive switch assembly (11) and lead-in wire sintering holder assembly (12) place middle part in the air pressure mouth (9), and contacts with guide pillar (7) contact, and air pressure mouth (9) interface has sealing ring (10); The lead-in wire of sensitive switch assembly (11) is welded together with the lead-in wire of lead-in wire sintering holder assembly (12), and sintering holder assembly (12) two ends are integrally welded with card line seat (13) and air pressure mouth (9) respectively.
5. pressure difference switch according to claim 1, it is characterized in that seal washer (14), metal gasket (15) are arranged in the card line seat (13), cable (20) is tightened by tension seat (16), introduce in the card line seat (13), cable (20) is fixed on the tension seat (16) by screw (17), spring pad (18) by pressure pad (19), the wire bonds of cable (20) lead-in wire and lead-in wire sintering holder assembly (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200114578U CN201041786Y (en) | 2007-04-04 | 2007-04-04 | Pressure difference switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200114578U CN201041786Y (en) | 2007-04-04 | 2007-04-04 | Pressure difference switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041786Y true CN201041786Y (en) | 2008-03-26 |
Family
ID=39253500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200114578U Expired - Fee Related CN201041786Y (en) | 2007-04-04 | 2007-04-04 | Pressure difference switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041786Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676400A (en) * | 2013-11-29 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Lamp and telescopic rod thereof |
| CN104867779A (en) * | 2014-02-26 | 2015-08-26 | 泽坦有限公司 | Differential pressure switch used for fuel filter |
-
2007
- 2007-04-04 CN CNU2007200114578U patent/CN201041786Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676400A (en) * | 2013-11-29 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Lamp and telescopic rod thereof |
| CN104867779A (en) * | 2014-02-26 | 2015-08-26 | 泽坦有限公司 | Differential pressure switch used for fuel filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20130404 |