CN202252256U - External pilot-operated normally-opened solenoid valve - Google Patents
External pilot-operated normally-opened solenoid valve Download PDFInfo
- Publication number
- CN202252256U CN202252256U CN2011203170059U CN201120317005U CN202252256U CN 202252256 U CN202252256 U CN 202252256U CN 2011203170059 U CN2011203170059 U CN 2011203170059U CN 201120317005 U CN201120317005 U CN 201120317005U CN 202252256 U CN202252256 U CN 202252256U
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- China
- Prior art keywords
- piston
- valve
- iron core
- solenoid valve
- moving iron
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- Expired - Fee Related
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Abstract
The utility model discloses an external pilot-operated normally-opened solenoid valve. An upper pilot-operated hole (51) in the electromagnetic core (50) is opened or sealed by controlling a movable iron core (40) to move by an electromagnetic core (50), so as to change a pressure difference between an upper face and a lower face of a piston (30) of a sealed valve port (13). Therefore, the piston (30) can move up and down to open and close the valve port (13), so as to reach a purpose of enabling air inlet to be smooth or be separated. The external pilot-operated normally-opened solenoid valve provided by the utility model has the advantages of no noises and more stable work.
Description
Technical field
The utility model relates to a kind of external pilot formula normally open solenoid valve.
Background technique
Along with the continuous development of modern society, automation equipment universal increasing, and fluid Automatic Control Component solenoid valve, consumption also is increasing.Solenoid valve of a great variety, its basic principle are all the same, can no longer set forth here.The pilot hole of existing leading type normally open solenoid valve is opened in valve pocket inside on the market; Static iron core is in the lower end of moving iron core; Moving iron core moves down during the electromagnetic coil energising; So all difficult to the installation and the processing of static iron core, that does a little is bad, under the interchange situation, just is easy to generate situation such as noise.Normally open solenoid valve under above-mentioned situation is normally closed solenoid valve relatively, the structure more complicated, and the energising action is very unstable.People expect to invent a kind of external pilot formula normally open solenoid valve simple in structure for this reason, and its operating principle is the same with traditional normally closed solenoid valve, safety and stability.
The model utility content
To the deficiency that above-mentioned existing technology exists, the purpose of the utility model provides a kind of external pilot formula normally open solenoid valve, and it has noise free, and the advantage of working stability.
To achieve these goals, the technological scheme that the utility model adopted is: external pilot formula normally open solenoid valve comprises valve body; Be fixed in the valve gap of valve body top, said valve body has suction port and the air outlet that lays respectively at the valve body both sides, and is positioned at the valve port that the valve body top is communicated with suction port and air outlet; It is characterized in that; Be coated with piston on the said valve port, said piston is embedded in the valve gap and can slides up and down, and is provided with piston spring between the top of chamber in the top of said piston and the said valve gap; Said valve gap top also is fixed with electromagnetic core, is provided with moving iron core between said electromagnetism electricity core and the valve gap, and said moving iron core is connected on the valve gap through moving iron core spring; Said piston one side offers the pressure relief vent that communicates with inlet hole; Said valve gap end face offers the pore that communicates with pressure relief vent; Said electromagnetic core center offers the last pilot hole that connects pore; Said valve gap one side offers the following pilot hole that is communicated with the air outlet, and the upper end of said pilot hole down is connected said upper end of going up pilot hole through being positioned at outside tracheae.
Preferably, said piston outer side wall is inlaid with piston ring.
Preferably, said moving iron core upper end portion has sealing gasket.
Preferably, said moving core center has blind hole, is provided with Packing spring in the said blind hole, and said Packing spring upper end withstands on said sealing gasket bottom surface.
Preferably, said moving iron core is positioned at sleeve pipe, said sleeve pipe between said electromagnetic core and valve gap and be communicated with said on pilot hole and pore.
After adopting said structure; The utility model is compared the advantage that is had with existing technology: when electromagnetic core was not worked, moving iron core was in the position away from electromagnetic core under moving iron core spring force effect, and the last pilot hole in the electromagnetic core is held open; Pressure relief vent, pore, last pilot hole, tracheae are communicated with successively with following pilot hole and form the loop; Make to be positioned at the inner piston upper and lower surface air pressure balance of valve gap, piston overcomes the effect of piston spring elastic force and moves up under suction pressure, suction port is connected through valve port with the air outlet; Solenoid valve is in normally open and keeps clear, and electromagnetic core was in off-position and did not work this moment; When needs close solenoid valve and cut off gas through the time, only need opens solenoid valve, make electromagnetic core energising produce magnetic force and overcome the elastic force of moving iron core spring and attract moving iron core to move up; Make end face on the iron core be close to the bottom surface of electromagnetic core; The last pilot hole sealing that electromagnetic core is inner of moving iron core this moment cuts off the residing space of piston upper and lower surface, under suction pressure; The end face pressure is greater than its bottom surface pressure on the piston; Under the effect of piston spring elastic force, piston moves down simultaneously, and the sealing valve port cuts off suction port and air outlet.Therefore the utility model electromagnetic core when often opening is not worked; Only need when closing solenoid valve, work, and the tracheae of connection pilot hole is positioned at the solenoid valve outside, makes in the solenoid valve stressed less; Therefore can therefore not produce noise and solenoid valve more stable work.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of the utility model.
Among the figure: 10, valve body; 11, suction port;
12, air outlet; 13, valve port;
20, valve gap; 21, pore;
22, following pilot hole; 30, piston;
31, pressure relief vent; 32, piston spring;
33, piston ring; 40, moving iron core;
41, moving iron core spring; 42, sealing gasket;
43, blind hole; 44, Packing spring; 45, sleeve pipe;
50, electromagnetic core; 51, go up pilot hole;
60, tracheae.
Embodiment
The following stated is merely the preferred embodiment of the utility model, does not therefore limit the protection domain of the utility model.
Embodiment, see shown in Figure 1:
The utility model is a kind of external pilot formula normally open solenoid valve; Comprise valve body 10; Be fixed in the valve gap 20 of valve body 10 tops, said valve body 10 has the suction port 11 and air outlet 12 that lays respectively at valve body 10 both sides, and is positioned at the valve port 13 that valve body 10 tops are communicated with suction port 11 and air outlet 12; It is characterized in that; Be coated with piston 30 on the said valve port 13, said piston 30 is embedded in the valve gap 20 and can slides up and down, and is provided with piston spring 32 between the top of chamber in the top of said piston 30 and the said valve gap 20; Said valve gap 20 tops also are fixed with electromagnetic core 50, are provided with moving iron core 40 between said electromagnetic core and the valve gap 20, and said moving iron core 40 is connected on the valve gap 20 through moving iron core spring 41; Said piston 30 1 sides offer the pressure relief vent 31 that communicates with inlet hole 21; Said valve gap 20 end faces offer the pore 21 that communicates with pressure relief vent 31; Said electromagnetic core 50 centers offer the last pilot hole 51 that connects pore 21; Said valve gap 20 1 sides offer the following pilot hole 22 that is communicated with air outlet 12, and the upper end of said pilot hole 22 down is connected said upper end of going up pilot hole 51 through being positioned at outside tracheae 60.In the utility model; When electromagnetic core 50 was not worked, moving iron core 40 was in the position away from electromagnetic core 50 under moving iron core spring 41 elastic force effects, and the last pilot hole 51 in the electromagnetic core 50 is held open; Pressure relief vent 31, pore 21, last pilot hole 51, tracheae 60 are communicated with successively with following pilot hole 22 and form the loop; Make the piston 30 upper and lower surface air pressure balances that are positioned at valve gap 20 inside, piston 30 overcomes piston spring 32 elastic force effects and moves up under suction pressure, suction port 11 is connected through valve port 13 with air outlet 12; Solenoid valve is in normally open and keeps clear, and electromagnetic core 50 was in off-position and did not work this moment; When needs close solenoid valve and cut off gas through the time, only need opens solenoid valve, make electromagnetic core 50 energising produce magnetic force and overcome the elastic force of moving iron core spring 41 and attract moving iron core 40 to move up; Make end face on the iron core 40 be close to the bottom surface of electromagnetic core 50; This moment, moving iron core 40 sealed electromagnetic core 50 inner last pilot holes 51, the residing space of piston 30 upper and lower surfaces was cut off, under suction pressure; The end face pressure is greater than its bottom surface pressure on the piston 30; Under piston spring 32 elastic force effects, piston 30 moves down simultaneously, and sealing valve port 13 cuts off suction port 11 and air outlet 12.Therefore the utility model electromagnetic core 50 when often opening is not worked; Only need when closing solenoid valve, work, and the tracheae 60 of connection pilot hole is positioned at the solenoid valve outside, makes in the solenoid valve stressed less; Therefore can therefore not produce noise and solenoid valve more stable work.
In order to improve the sealing that piston 30 is positioned at valve gap 20 inside, said piston 30 outer side walls are inlaid with piston ring 33, piston 30 is contacted with valve gap 20 closely and not can therefore produce gas leakage.When needs were closed solenoid valve, moving iron core 40 needed to go up pilot hole 51 sealings, and it is tight inadequately to only depend on moving iron core 40 end faces to seal, and therefore said moving iron core 40 upper end portions have sealing gasket 42, made pilot hole 51 better by the sealing effect of sealing gasket 42 sealings.Even if there is sealing gasket 42; The situation that still possibly exist sealing gasket 42 to contact defective tightness with electromagnetic core 50 takes place; Therefore said moving iron core 40 centers have blind hole 43, are provided with Packing spring 44 in the said blind hole 43, and said Packing spring 44 upper ends withstand on said sealing gasket 42 bottom surfaces.Sealing gasket 42 just can closely contact with electromagnetic core 50 like this, can not have gas leak phenomenon with going up pilot hole 51 sealings fully.Because last pilot hole 51 is connected with pore 21 on the valve gap 20; Be originally as passage through solenoid valve; Therefore possibly have gas leakage, said moving iron core 40 is positioned at sleeve pipe 45, said sleeve pipe 45 between said electromagnetic core 50 and valve gap 20 and be communicated with said on pilot hole 51 and pore 21; Use sleeve pipe 45 to come conducting pore 21 and last pilot hole 51, avoid gas leak phenomenon to take place.
The external pilot formula normally open solenoid valve of the utility model, it has noise free, the advantage of more stable work.
Claims (5)
1. external pilot formula normally open solenoid valve; Comprise valve body (10); Be fixed in the valve gap (20) of valve body (10) top, said valve body (10) has the suction port (11) and air outlet (12) that lays respectively at valve body (10) both sides, and is positioned at the valve port (13) that valve body (10) top is communicated with suction port (11) and air outlet (12); It is characterized in that; Be coated with piston (30) on the said valve port (13), said piston (30) is embedded in the valve gap (20) and can slides up and down, and is provided with piston spring (32) between the top of said piston (30) and the interior top of chamber of said valve gap (20); Said valve gap (20) top also is fixed with electromagnetic core (50), is provided with moving iron core (40) between said electromagnetic core and the valve gap (20), and said moving iron core (40) is connected on the valve gap (20) through moving iron core spring (41); Said piston (30) one sides offer the pressure relief vent (31) that communicates with inlet hole (21); Said valve gap (20) end face offers the pore (21) that communicates with pressure relief vent (31); Said electromagnetic core (50) center offers the last pilot hole (51) that connects pore (21); Said valve gap (20) one sides offer the following pilot hole (22) that is communicated with air outlet (12), and the upper end of said pilot hole (22) down is connected said upper end of going up pilot hole (51) through being positioned at outside tracheae (60).
2. external pilot formula normally open solenoid valve according to claim 1 is characterized in that, said piston (30) outer side wall is inlaid with piston ring (33).
3. external pilot formula normally open solenoid valve according to claim 1 is characterized in that, said moving iron core (40) upper end portion has sealing gasket (42).
4. external pilot formula normally open solenoid valve according to claim 3; It is characterized in that; Said moving iron core (40) center has blind hole (43), is provided with Packing spring (44) in the said blind hole (43), and said Packing spring (44) upper end withstands on said sealing gasket (42) bottom surface.
5. external pilot formula normally open solenoid valve according to claim 4; It is characterized in that; Said moving iron core (40) is positioned at sleeve pipe (45), and said sleeve pipe (45) is positioned between said electromagnetic core (50) and the valve gap (20) and is communicated with said pilot hole (51) and the pore (21) gone up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203170059U CN202252256U (en) | 2011-08-29 | 2011-08-29 | External pilot-operated normally-opened solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203170059U CN202252256U (en) | 2011-08-29 | 2011-08-29 | External pilot-operated normally-opened solenoid valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202252256U true CN202252256U (en) | 2012-05-30 |
Family
ID=46113498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203170059U Expired - Fee Related CN202252256U (en) | 2011-08-29 | 2011-08-29 | External pilot-operated normally-opened solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202252256U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100758A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Two-position two-way solenoid valve |
| CN105570473A (en) * | 2016-02-24 | 2016-05-11 | 湖北仁创科技有限公司 | High-pressure water-mist pilot-operated type non-hydraulic damping electromagnetic distribution valve |
| CN106286952A (en) * | 2016-08-29 | 2017-01-04 | 贵州新安航空机械有限责任公司 | A kind of automatic reduction seals the electromagnetic valve movable iron core assembly of risk |
-
2011
- 2011-08-29 CN CN2011203170059U patent/CN202252256U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100758A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Two-position two-way solenoid valve |
| CN105570473A (en) * | 2016-02-24 | 2016-05-11 | 湖北仁创科技有限公司 | High-pressure water-mist pilot-operated type non-hydraulic damping electromagnetic distribution valve |
| CN106286952A (en) * | 2016-08-29 | 2017-01-04 | 贵州新安航空机械有限责任公司 | A kind of automatic reduction seals the electromagnetic valve movable iron core assembly of risk |
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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: 20120530 Termination date: 20130829 |