CN201851418U

CN201851418U - Double-spool valve for pneumatic valve terminal

Info

Publication number: CN201851418U
Application number: CN2010206077485U
Authority: CN
Inventors: 翁之旦; 陶国良
Original assignee: Ningbo Hoyea Machinery Manufacture Co Ltd
Current assignee: Ningbo Hoyea Machinery Manufacture Co Ltd
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2011-06-01
Anticipated expiration: 2020-11-12

Abstract

The utility model discloses a double-spool valve for a pneumatic valve terminal, which comprises a valve body, two side plates and two miniature solenoid valves, wherein the side plates are arranged on the two sides of the valve body; the miniature solenoid valves are arranged on the control end surface of the valve body; a first main spool, a second main spool, a first manual spool and a second manual spool are slidingly arranged in the valve body; the first main spool and the second main spool respectively penetrate a working chamber of the first main spool and a working chamber of the second main spool, and the two miniature solenoid valves are used as pilot valves and respectively control the movement of the first main spool and the movement of the second main spool through a differential circuit, therefore two mutually-independent two-station three-way valves are formed; the first manual spool and the second manual spool are respectively positioned in a working chamber of the first manual spool and a working chamber of the second manual spool; and two mutually-isolated chambers are respectively formed between the first manual spool and the working chamber of the first manual spool, and between the second manual spool and the working chamber of the second manual spool.

Description

The double spool valve that is used for the pneumatic valve island

Technical field

The utility model relates to a kind of pneumatic valve island, particularly is used to form the double spool valve on pneumatic valve island.

Background technique

In the early stage pneumatic system, all kinds of solenoid valves are arranged separately on the body respectively by pipe fitting joint and cable.But along with the increase of pneumatic system complexity, the quantity of elements such as the solenoid valve of employing also increases thereupon, and connecting pipeline and cable are also complicated more.Therefore in the early 1990s, Germany Festo company of famous pneumatic producer has released the electric integrated intelligent control element one valve island of a new generation, and it has unified gas source interface and automatically controlled signal interface.Fundamentally simplify the hardware configuration of pneumatic system interface, improved the reliability of system.

Valve island product is on the market monopolized by external producer at present, mainly be divided into standard type valve island and compact type valve island, wherein compact type valve island is fit to reasons such as dispersion and the multiple occasion of centralized control because the volume small flow is big, receive the concern in market day by day, become the trend of valve island development from now on.At present, the used double spool valve in compact type valve island mainly contains two big classes, one class is representative with Festo-CPV type valve island, its double spool valve adopts the integral type pilot valve and the valve body combination of exploitation separately, make it simple and compact for structure, but the development cost of integral type pilot valve is high, processed complex, and maintenance is also inconvenient with replacing.Another kind of is representative with Norgren-VM type valve island, and it is pilot valve that its double spool valve adopts standard coil pipe valve, avoided the exploitation of integral type pilot valve, thereby greatly reduced cost, and maintenance is all very convenient with replacing; But it does not realize that gas resets, and still adopts spring reset, so just makes its working life and the reliability all will be well below Festo-CPV type valve island.

The model utility content

The purpose of this utility model provides a kind of brand-new double spool valve that is used for the pneumatic valve island.

For achieving the above object, technical solution adopted in the utility model is: this is used for the double spool valve on pneumatic valve island, it comprises valve body, first side plate, second side plate and two miniature solenoid valve, the operative end surface of described valve body is relative with the control end face, described two miniature solenoid valve are fixedly mounted on the control end face of valve body, described first side plate and second side plate correspondingly are fixedly connected with first side and second side of valve body respectively, and first side of described valve body is relative with second side; It is characterized in that: be provided with the first main exhaust chamber in the described valve body, the second main exhaust chamber, the first pilot stage exhaust cavity, the second pilot stage exhaust cavity, the first piston exhaust cavity, the second piston exhaust cavity, the pilot stage pressure chamber, primary pressure chamber, first active chamber, second active chamber, first-hand movable valve plug first pressure chamber, second-hand's movable valve plug first pressure chamber, first-hand movable valve plug second pressure chamber, second-hand's movable valve plug second pressure chamber, first-hand movable valve plug second pressure port, first-hand movable valve plug first pressure port, second-hand's movable valve plug first pressure port, second-hand's movable valve plug second pressure port, first-hand movable valve plug active chamber, second-hand's movable valve plug active chamber, main valve plug first active chamber and main valve plug second active chamber; The outlet of described first active chamber and second active chamber is positioned on the operative end surface of valve body; The described first main exhaust chamber, the second main exhaust chamber, the first pilot stage exhaust cavity, the second pilot stage exhaust cavity, pilot stage pressure chamber and primary pressure chamber run through valve body along a junction surface of valve body to another junction surface direction separately; Described main valve plug first active chamber and main valve plug second active chamber lay respectively at the both sides of primary pressure chamber, and main valve plug first active chamber, main valve plug second active chamber and primary pressure chamber are interconnected; The described first main exhaust chamber is communicated with first active chamber by main valve plug first active chamber, and the described second main exhaust chamber is communicated with second active chamber by main valve plug second active chamber; Be provided with the first main piston chamber in described first side plate, be provided with the second main piston chamber in described second side plate accordingly, be slidingly fitted with the first main valve plug piston and the second main valve plug piston in the described first main piston chamber and the second main piston chamber respectively, the described first main piston chamber is separated into first sub-chamber, the first main piston chamber and the second sub-chamber, the first main piston chamber by the first main valve plug piston, and the second main piston chamber is separated into first sub-chamber, the second main piston chamber and the second sub-chamber, the second main piston chamber by the second main valve plug piston; First main valve plug runs through main valve plug first active chamber, second main valve plug runs through main valve plug second active chamber, and first main valve plug, second main valve plug and valve body form and are slidingly matched, one end of first main valve plug is fixedlyed connected with the first main valve plug piston, and an end of second main valve plug is fixedlyed connected with the second main valve plug piston; The outlet of described second-hand's movable valve plug active chamber is positioned on first side of valve body, be slidingly fitted with second-hand's movable valve plug in second-hand's movable valve plug active chamber, form second-hand's movable valve plug active chamber first sub-chamber and the second-hand's movable valve plug active chamber second sub-chamber that isolates mutually between the inwall of second-hand's movable valve plug active chamber and the second-hand's movable valve plug; The outlet of described first-hand movable valve plug active chamber is positioned on first side of valve body, be slidingly fitted with first-hand movable valve plug in the first-hand movable valve plug active chamber, form first-hand movable valve plug active chamber first sub-chamber and the first-hand movable valve plug active chamber second sub-chamber that isolates mutually between the inwall of first-hand movable valve plug active chamber and the first-hand movable valve plug; Described primary pressure chamber is communicated with the pilot stage pressure chamber; Described pilot stage pressure chamber is communicated with first-hand movable valve plug first pressure chamber; Described first-hand movable valve plug first pressure chamber is communicated with first-hand movable valve plug active chamber by first-hand movable valve plug first pressure port; The described first-hand movable valve plug active chamber second sub-chamber is communicated with first-hand movable valve plug second pressure chamber by first-hand movable valve plug second pressure port; Described first-hand movable valve plug second pressure chamber is communicated with the first sub-chamber, the first main piston chamber; The second sub-chamber, the described first main piston chamber is communicated with the first piston exhaust cavity; Described first piston exhaust cavity is communicated with first-hand movable valve plug first pressure chamber; Described pilot stage pressure chamber is communicated with second-hand's movable valve plug first pressure chamber; Described second-hand's movable valve plug first pressure chamber is communicated with second-hand's movable valve plug active chamber first sub-chamber by second-hand's movable valve plug first pressure port; Described second-hand's movable valve plug active chamber is communicated with second-hand's movable valve plug second pressure chamber by second-hand's movable valve plug second pressure port; Described second-hand's movable valve plug second pressure chamber is communicated with the first sub-chamber, the second main piston chamber; The second sub-chamber, the described second main piston chamber is communicated with the second piston exhaust cavity; The described second piston exhaust cavity is communicated with second-hand's movable valve plug first pressure chamber; The air supply opening of one of them miniature solenoid valve is communicated with the pilot stage pressure chamber, and the working hole of this miniature solenoid valve is communicated with first-hand movable valve plug active chamber, and the relief opening of this miniature solenoid valve is communicated with the first pilot stage exhaust cavity; The air supply opening of another miniature solenoid valve is communicated with the pilot stage pressure chamber, and the working hole of this miniature solenoid valve is communicated with second-hand's movable valve plug active chamber second sub-chamber, and the relief opening of this miniature solenoid valve is communicated with the second pilot stage exhaust cavity.

Further, the area of the first main valve plug piston described in the utility model is the twice of the attachment portion area of the first main valve plug piston and first main valve plug, and the area of the described second main valve plug piston is the twice of the attachment portion area of the second main valve plug piston and second main valve plug.

Further, second-hand's movable valve plug described in the utility model along its axially spaced-apart be provided with two circumferential circular grooves, between described circular groove and second-hand's movable valve plug active chamber, form the second-hand's movable valve plug active chamber first sub-chamber and the second-hand's movable valve plug active chamber second sub-chamber that isolate mutually.

Further, first-hand movable valve plug described in the utility model along its axially spaced-apart be provided with two circumferential circular grooves, between described circular groove and first-hand movable valve plug active chamber, form the first-hand movable valve plug active chamber first sub-chamber and the first-hand movable valve plug active chamber second sub-chamber that isolate mutually.

Further, first-hand movable valve plug first pressure port described in the utility model is located in first-hand movable valve plug first pressure chamber, described first-hand movable valve plug second pressure port is located in first-hand movable valve plug second pressure chamber, described second-hand's movable valve plug first pressure port is located in second-hand's movable valve plug first pressure chamber, and described second-hand's movable valve plug second pressure port is located in second-hand's movable valve plug second pressure chamber.

Compared with prior art, the beneficial effects of the utility model are: the utility model double spool valve rational in infrastructure, compact, realized being installed on the control end face of valve body as pilot valve and with it with the miniature solenoid valve of standard, thereby replace off-gauge integral type pilot valve used in the prior art, greatly reduce cost, made things convenient for maintenance and safeguarded.And the utility model at miniature solenoid valve and brand-new design valve body, first main valve plug and second main valve plug, and the compression area that makes the first sub-chamber, the first main piston chamber is greater than the second sub-chamber, the first main piston chamber, and the compression area in the first sub-chamber, the second main piston chamber is also greater than the second sub-chamber, the second main piston chamber simultaneously; Make the both sides of two main valve plug pistons exist the gas circuit of area difference and its both sides to be communicated with thus, thereby form differential circuit in the both sides of two main valve plug pistons.Like this, two miniature solenoid valve just can be controlled the motion of first main valve plug and second main valve plug by differential circuit respectively, thereby cancelled spring reset structure of the prior art, realized that gas resets, therefore structure is simpler, has also improved the working life and the reliability of valve simultaneously greatly.Particularly the area when the first main valve plug piston is the twice (promptly the compression area in the first sub-chamber, the first main piston chamber is the twice in the second sub-chamber, the first main piston chamber) of the attachment portion area of the first main valve plug piston and first main valve plug, when the area of the second main valve plug piston is the twice (promptly the compression area in the first sub-chamber, the second main piston chamber is the twice in the second sub-chamber, the second main piston chamber) of the attachment portion area of the second main valve plug piston and second main valve plug, first main valve plug and second main valve plug suffered power when two lateral movements is just equal substantially, and therefore first main valve plug and second main valve plug opens, the time of closing is also equal substantially.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a perspective view of the present utility model;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the worm's eye view of Fig. 2;

Fig. 5 is the right elevation of Fig. 2;

Fig. 6 is the A-A sectional view of Fig. 3;

Fig. 7 is the B-B sectional view of Fig. 3;

Fig. 8 is the C-C sectional view of Fig. 2;

Fig. 9 is the D-D sectional view of Fig. 2;

Figure 10 is the E-E sectional view of Fig. 2;

Figure 11 is the F-F sectional view of Fig. 2;

Figure 12 be the utility model double spool valve often start shooting can the structure sectional view.

Among the figure: 1. valve body, 1a. operative end surface, 1b. control end face, 1c. first side, 1d. second side, 2. first side plate, 3. second side plate, 4. sealing gasket, 5. miniature solenoid valve, 6. first main valve plug, 6a. the first main valve plug piston, 7. second main valve plug, 7a. the second main valve plug piston, 8. first valve pocket, 9. second valve pocket, 10. seal ring, 11. first-hand movable valve plug, 12. second-hand's movable valve plugs, 13. first bolts hole, 14. second bolt hole, 15. the 3rd bolt hole, 16. first main exhaust chambeies, 17. second main exhaust chambeies, 18. the first pilot stage exhaust cavity, 19. the second pilot stage exhaust cavity, 20. first piston exhaust cavitys, 21. second piston exhaust cavitys, 22. pilot stage pressure chamber, 23. primary pressure chamber, 24. first active chambers, 25. second active chambers, 26. first-hand movable valve plug first pressure chamber, 27. second-hand's movable valve plug first pressure chamber, 28. first-hand movable valve plug second pressure chambers, 29. second-hand's movable valve plugs, second pressure chamber, 30. first-hand movable valve plug second pressure port, 31. first-hand movable valve plug first pressure port, 32. second-hand's movable valve plugs, first pressure port, 33. second-hand's movable valve plugs, second pressure port, 34a. the first sub-chamber, the first main piston chamber, 34b. the second sub-chamber, the first main piston chamber, the first sub-chamber, the 35a. second main piston chamber, the second sub-chamber, the 35b. second main piston chamber, 36a. the first-hand movable valve plug active chamber first sub-chamber, 36b. the first-hand movable valve plug active chamber second sub-chamber, 37a. second-hand's movable valve plug active chamber first sub-chamber, 37b. second-hand's movable valve plug active chamber second sub-chamber, 38. main valve plug first active chamber, 39. main valve plug second active chamber, 40. first screw holes, 41. second screw holes, 42. the 3rd screw hole, 43. the 4th screw hole, first passage in the 44. first side plate internal channels, 45. valve bodies, 46. second channel in the second side plate internal channel, 47. valve bodies.

Embodiment

In mode of execution shown in Figure 1, the double spool valve that the utility model is used for the pneumatic valve island comprises valve body 1, first side plate 2, second side plate 3, two miniature solenoid valve 5 and is installed on sealing gasket 4 on valve body 1 junction surface.The operative end surface 1a of valve body 1 is relative with control end face 1b, and promptly the operative end surface 1a of valve body 1 is the upper-end surface of valve body 1, and control end face 1b is the lower end surface of valve body 1.Two 5 of miniature solenoid valve are fixedly mounted on the control end face 1b of valve body 1.First side plate 2 and second side plate 3 correspondingly are fixedly connected with the first side 1c and the second side 1d of valve body 1 respectively.The first side 1c of valve body 1 is relative with the second side 1d, and promptly the first side 1c of valve body 1 is the left surface of valve body 1, and the second side 1d is the right flank of valve body 1.

Be respectively equipped with first bolt hole 13, second bolt hole 14 and the 3rd bolt hole 15 in first side plate, 2 tops, second side plate, 3 tops and valve body 1 bottom, need be when the multi-disc valve is connected into the valve island with bolt passing through bolt hole in order to fixing.

As Fig. 1, Fig. 4, shown in Figure 5, the upper and lower both sides that the upper and lower both sides of first side plate 2 are respectively equipped with first screw hole 40 and second screw hole, 41, the second side plates 3 are respectively equipped with the 3rd screw hole 42 and the 4th screw hole 43.Such first side plate 2 and second side plate 3 just can be installed on the first side 1c and the second side 1d of valve body 1 by screw respectively.Two 5 of miniature solenoid valve are installed on the control end face 1b of valve body 1 with screw respectively.

As shown in Figure 2, be provided with the first main exhaust chamber 16 in the valve body 1, the second main exhaust chamber 17, the first pilot stage exhaust cavity 18, the second pilot stage exhaust cavity 19, first piston exhaust cavity 20, the second piston exhaust cavity 21, pilot stage pressure chamber 22, primary pressure chamber 23, first-hand movable valve plug first pressure chamber 26, second-hand's movable valve plug first pressure chamber 27, first-hand movable valve plug second pressure chamber 28 and second-hand's movable valve plug second pressure chamber 29, wherein, the first main exhaust chamber 16, the second main exhaust chamber 17, the first pilot stage exhaust cavity 18, the second pilot stage exhaust cavity 19, pilot stage pressure chamber 22 and primary pressure chamber 23 run through valve body 1 along a junction surface of valve body 1 to another junction surface direction separately.In addition, be provided with first-hand movable valve plug first pressure port 31 in first-hand movable valve plug first pressure chamber 26, be provided with second-hand's movable valve plug first pressure port 32 in second-hand's movable valve plug first pressure chamber 27, be provided with first-hand movable valve plug second pressure port 30 in first-hand movable valve plug second pressure chamber 28, be provided with second-hand's movable valve plug second pressure port 33 in second-hand's movable valve plug second pressure chamber 29.Certainly, first-hand movable valve plug first pressure port 31, first-hand movable valve plug second pressure port 30, second-hand's movable valve plug first pressure port 32, second-hand's movable valve plug second pressure port 33 also can be located in above-described each chamber and be located at other positions, as long as first-hand movable valve plug first pressure chamber 26 is communicated with the first-hand movable valve plug active chamber second sub-chamber 36b by first-hand movable valve plug first pressure port 31, the first-hand movable valve plug active chamber second sub-chamber 36b is communicated with first-hand movable valve plug second pressure chamber 28 by first-hand movable valve plug second pressure port 30, second-hand's movable valve plug first pressure chamber 27 is communicated with second-hand's movable valve plug active chamber first sub-chamber 37a by second-hand's movable valve plug first pressure port 32, second-hand's movable valve plug active chamber first sub-chamber 37a is communicated with second-hand's movable valve plug second pressure chamber 29 and gets final product by second-hand's movable valve plug second pressure port 33.

As Fig. 6, shown in Figure 7, the inside of valve body 1 is provided with first active chamber 24, second active chamber 25, first-hand movable valve plug active chamber, second-hand's movable valve plug active chamber, main valve plug first active chamber 38, main valve plug second active chamber 39, second channel 47 in first passage 45 and the valve body in the valve body.

The outlet of first active chamber 24 and second active chamber 25 is positioned on the operative end surface 1a of valve body 1, and they can connect actuator, to finish the action of appointment.Because the first main exhaust chamber 16, the second main exhaust chamber 17, the first pilot stage exhaust cavity 18, the second pilot stage exhaust cavity 19, pilot stage pressure chamber 22 and primary pressure chamber 23 run through valve body 1 along a junction surface of valve body 1 to another junction surface direction separately, therefore after the multi-disc valve connects to form the valve island, these cavitys that run through valve body 1 just constitute gas channels separately, these gas channels can be respectively with the valve island on the principal pressure mouth be connected with main vent.First piston exhaust cavity 20, the second piston exhaust cavity 21, first-hand movable valve plug first pressure chamber 26, first-hand movable valve plug second pressure chamber 28, second-hand's movable valve plug first pressure chamber 27 and second-hand's movable valve plug second pressure chamber 29 be not then for running through the cavity of valve body 1, after the multi-disc valve connects to form the valve island, these cavitys only with its under valve self be related, and do not take place not related with other valves.

As Fig. 2, Fig. 6, shown in Figure 7, main valve plug first active chamber 38 and main valve plug second active chamber 39 lay respectively at the both sides of primary pressure chamber 23, and main valve plug first active chamber 38, main valve plug second active chamber 39 and primary pressure chamber 23 are interconnected.The first main exhaust chamber 16 is communicated with first active chamber 24 by main valve plug first active chamber 38, and the second main exhaust chamber 17 is communicated with second active chamber 25 by main valve plug second active chamber 39.As Fig. 6, shown in Figure 7, be separately installed with first valve pocket 8, seal ring 10, second valve pocket 9, seal ring 10, second valve pocket 9, seal ring 10 in main valve plug first active chamber 38 from left to right successively, correspondingly, then be separately installed with first valve pocket 8, seal ring 10, second valve pocket 9, seal ring 10, second valve pocket 9, seal ring 10 in main valve plug second active chamber 39 from right to left successively.Thus, first valve pocket 8, second valve pocket 9 that are installed in the valve body 1 of seal ring 10 is fixed in main valve plug first active chamber 38 and main valve plug second active chamber 39.

Be provided with the first main piston chamber in first side plate 2, be provided with the second main piston chamber in second side plate 3 accordingly, be slidingly fitted with the first main valve plug piston 6a and the second main valve plug piston 7a in the first main piston chamber and the second main piston chamber respectively.The described first main piston chamber is separated into the first main piston chamber, first sub-chamber 34a and the first main piston chamber, the second sub-chamber 34b by the first main valve plug piston 6a, and the second main piston chamber is separated into the second main piston chamber, first sub-chamber 35a and the second main piston chamber, the second sub-chamber 35b by the second main valve plug piston 7a.

First main valve plug 6 runs through main valve plug first active chamber 38, second main valve plug 7 runs through main valve plug second active chamber 39, and six seal rings 10 in first main valve plug 6, second main valve plug 7 and main valve plug first active chamber 38, main valve plug second active chamber 39 form and are slidingly matched, and are slidingly matched thereby form between first main valve plug 6, second main valve plug 7 and valve body 1.One end of first main valve plug 6 is fixedlyed connected with the first main valve plug piston 6a, and an end of second main valve plug 7 is fixedlyed connected with the second main valve plug piston 7a.As a kind of embodiment of the present utility model, first main valve plug 6 and the first main valve plug piston 6a, second main valve plug 7 and the second main valve plug piston 7a design for integral type, are promptly formed by whole bar car system.As another kind of mode of execution of the present utility model, between first main valve plug 6 and the first main valve plug piston 6a, between second main valve plug 7 and the second main valve plug piston 7a as long as fixedly connected, for example with jump ring or be threaded.

Owing to fixedly connected between first main valve plug 6 and the first main valve plug piston 6a, just make the area of the area of the first main valve plug piston 6a greater than the attachment portion of the first main valve plug piston 6a and first main valve plug 6, promptly the compression area of the first main piston chamber, the first sub-chamber 34a is greater than the first main piston chamber, the second sub-chamber 34b; Owing to fixedly connected between second main valve plug 7 and the second main valve plug piston 7a, just make the area of the area of the second main valve plug piston 7a greater than the attachment portion of the second main valve plug piston 7a and second main valve plug 7, promptly the compression area of the second main piston chamber, the first sub-chamber 35a is greater than the second main piston chamber, the second sub-chamber 35b.Like this, because the first main valve plug piston 6a is different with the second main valve plug piston 7a both sides compression area, just can form differential circuit, two miniature solenoid valve 5 just can be controlled the motion of first main valve plug 6 and second main valve plug 7 by differential circuit respectively as pilot valve.

In the utility model, the compression area of the first main piston chamber, the first sub-chamber 34a only needs to get final product greater than the first main piston chamber, the second sub-chamber 34b, and the compression area of the same second main piston chamber, the first sub-chamber 35a only needs to get final product greater than the second main piston chamber, the second sub-chamber 35b.As preferred embodiment of the present utility model, the area of the first main valve plug piston 6a is the twice of the attachment portion area of the first main valve plug piston 6a and first main valve plug 6, and promptly the compression area of the first main piston chamber, the first sub-chamber 34a is the twice of the first main piston chamber, the second sub-chamber 34b; The area of the second main valve plug piston 7a is the twice of the attachment portion area of the second main valve plug piston 7a and second main valve plug 7, and promptly the compression area of the second main piston chamber, the first sub-chamber 35a is the twice of the second main piston chamber, the second sub-chamber 35b.Will basically identical when such first main valve plug 6 and second main valve plug 7 move back and forth at stressed on, multiple both direction, the open and close time of valve also can basically identical.

First main valve plug 6 and second main valve plug 7 are separate, are independent of each other, and promptly are equivalent to two independently two-position three-way valves.As a kind of embodiment of the present utility model, among Fig. 6, what first main valve plug 6 and second main valve plug 7 were selected for use is the main valve plug of two normally closed functions, its working method is: when first main valve plug 6 was in position, a left side, first active chamber 24 was communicated with the first main exhaust chamber 16 by main valve plug first active chamber 38; When first main valve plug 6 was in right position, first active chamber 24 was communicated with primary pressure chamber 23 by main valve plug first active chamber 38, and the first main exhaust chamber 16 then is in closed state.When second main valve plug 7 was in position, a left side, second active chamber 25 was communicated with primary pressure chamber 23 by main valve plug second

active chamber

39, and 17 in the second main exhaust chamber is in closed state; When second main valve plug 7 was in right position, second active chamber 25 was communicated with the second main exhaust chamber 17 by main valve plug second active chamber 39.

As shown in figure 12, when first main valve plug 6 and second main valve plug 7 select for use normal start can spool the time, its working method is: when first main valve plug 6 was in position, a left side, first active chamber 24 was communicated with primary pressure chamber 23 by main valve plug first active chamber 38, and the first main exhaust chamber 16 then is in closed state; When first main valve plug 6 was in right position, first active chamber 24 was communicated with the first main exhaust chamber 16 by main valve plug first active chamber 38.When second main valve plug 7 was in position, a left side, second active chamber 25 was communicated with the second main exhaust chamber 17 by main valve plug second active chamber 39; When second main valve plug 7 was in right position, second active chamber 25 was communicated with primary pressure chamber 23 by main valve plug second

active chamber

39, and 17 in the second main exhaust chamber is in closed state.

In addition, two main valve plugs also can adopt one normally closed one form of often opening more than.In addition, because the work of two main valve plugs is separate, main valve plug can have multiple compound mode flexibly.

As shown in Figure 6, the outlet of second-hand's movable valve plug active chamber is positioned on the first side 1c of valve body 1, in second-hand's movable valve plug active chamber second-hand's movable valve plug 12 is installed, makes second-hand's movable valve plug 12 in second-hand's movable valve plug active chamber, to move back and forth along its length.As a kind of embodiment of the present utility model and consider the attractive in appearance of valve monnolithic case, second-hand's movable valve plug 12 can run through first side plate 2.As another kind of mode of execution of the present utility model, also can block first side plate 2 in the position at second-hand's movable valve plug 12 places, can directly on the first side 1c of valve body 1, operate second-hand's movable valve plug 12 thus.

Form second-hand's movable valve plug active chamber first sub-chamber 37a and the second-hand's movable valve plug active chamber second sub-chamber 37b that isolates mutually between the inwall of second-hand's movable valve plug active chamber and the second-hand's movable valve plug 12.As a kind of mode of execution wherein, second-hand's movable valve plug 12 along its axially spaced-apart be provided with two circumferential circular grooves, thereby between these two circular grooves and second-hand's movable valve plug active chamber, form second-hand's movable valve plug active chamber first sub-chamber 37a and the second-hand's movable valve plug active chamber second sub-chamber 37b that isolates mutually.As another kind of mode of execution of the present utility model, also can on second-hand's movable valve plug 12, radially make a call to two holes or special-shaped groove, these two holes or special-shaped groove are spaced apart along its length, as long as these two holes or special-shaped groove can form two cavitys of mutual isolation with second-hand's movable valve plug active chamber.

As shown in Figure 6, the outlet of first-hand movable valve plug active chamber is positioned on the first side 1c of valve body 1, and first-hand movable valve plug 11 is installed in the first-hand movable valve plug active chamber, makes first-hand movable valve plug 11 to reciprocatingly slide along the length direction of first-hand movable valve plug active chamber.Equally, as a kind of embodiment of the present utility model and consider the attractive in appearance of valve monnolithic case, first-hand movable valve plug 11 can run through first side plate 2.As another kind of mode of execution of the present utility model, also can block first side plate 2, so that directly on the first side 1c of valve body 1, operate first-hand movable valve plug 11 at place, first-hand movable valve plug 11 places.

Form first-hand movable valve plug active chamber first sub-chamber 36a and the first-hand movable valve plug active chamber second sub-chamber 36b that isolates mutually between the inwall of first-hand movable valve plug active chamber and the first-hand movable valve plug 11.As a kind of embodiment wherein, first-hand movable valve plug 11 along its axially spaced-apart be provided with two circumferential circular grooves, thereby between these two circular grooves and first-hand movable valve plug active chamber, form first-hand movable valve plug active chamber first sub-chamber 36a and the first-hand movable valve plug active chamber second sub-chamber 36b that isolates mutually.As another kind of mode of execution of the present utility model, also can on first-hand movable valve plug 11, radially make a call to two holes or special-shaped groove, these two holes or special-shaped groove are spaced apart along its length, as long as these two holes or special-shaped groove can form two cavitys of mutual isolation with first-hand movable valve plug active chamber.

As shown in Figure 2, primary pressure chamber 23 is communicated with pilot stage pressure chamber 22 by the breach of seal groove, and pilot stage pressure chamber 22 is communicated with first-hand movable valve plug first pressure chamber 26 by the breach of seal groove.As Fig. 6, shown in Figure 9, first-hand movable valve plug first pressure chamber 26 is communicated with first-hand movable valve plug active chamber by first-hand movable valve plug first pressure port 31.After the first-hand movable valve plug 11 of promotion moved right, then first-hand movable valve plug first pressure chamber 26 was communicated with the first-hand movable valve plug active chamber second sub-chamber 36b by first-hand movable valve plug first pressure port 31.As Fig. 6, shown in Figure 8, the first-hand movable valve plug active chamber second sub-chamber 36b is communicated with first-hand movable valve plug second pressure chamber 28 by first-hand movable valve plug second pressure port 30.As Fig. 6, shown in Figure 7, first-hand movable valve plug second pressure chamber 28 is communicated with the first main piston chamber, the first sub-chamber 34a by first passage 45, the first side plate internal channel 44 in the valve body 1 successively.The first main piston chamber, the second sub-chamber 34b is communicated with first piston exhaust cavity 20 by the breach of the first adjacent valve pocket 8.As shown in Figure 2, first piston exhaust cavity 20 is communicated with first-hand movable valve plug first pressure chamber 26 by the breach of seal groove.Moreover, the compression area difference of the first main valve plug piston 6a both sides, thus the both sides of the first main valve plug piston 6a have just formed differential circuit, control the motion of first main valve plug 6 thus, so just can cancel Returnning spring, realize that gas resets.

As shown in Figure 6, the air supply opening that is positioned at the miniature solenoid valve 5 of first side plate, 2 one sides is communicated with pilot stage pressure chamber 22, the working hole of miniature solenoid valve 5 is communicated with the first-hand movable valve plug active chamber second sub-chamber 36b, after the first-hand movable valve plug 11 of promotion moves right, then the working hole of miniature solenoid valve 5 is communicated with the first-hand movable valve plug active chamber first sub-chamber 36a, and the relief opening of miniature solenoid valve 5 is communicated with the first pilot stage exhaust cavity 18.

As shown in Figure 2, pilot stage pressure chamber 22 is communicated with second-hand's movable valve plug first pressure chamber 27 by the breach of seal groove.As Fig. 6, shown in Figure 10, second-hand's movable valve plug first pressure chamber 27 is communicated with second-hand's movable valve plug active chamber first sub-chamber 37a by second-hand's movable valve plug first pressure port 32.As Fig. 6, shown in Figure 11, second-hand's movable valve plug active chamber second sub-chamber 37b is communicated with second-hand's movable valve plug second pressure chamber 29 by second-hand's movable valve plug second pressure port 33.After promotion second-hand movable valve plug 12 moved right, then second-hand's movable valve plug active chamber first sub-chamber 37a was communicated with second-hand's movable valve plug second pressure chamber 29 by second-hand's movable valve plug second pressure port 33.As Fig. 6, shown in Figure 7, second-hand's movable valve plug second pressure chamber 29 is communicated with the second main piston chamber, the first sub-chamber 35a by second channel 47, the second side plate internal channel 46 in the valve body successively.The second main piston chamber, the second sub-chamber 35b is communicated with the second piston exhaust cavity 21 by the breach of the first adjacent valve pocket 8.As shown in Figure 2, the second piston exhaust cavity 21 is communicated with second-hand's movable valve plug first pressure chamber 27 by the breach of seal groove.Moreover, the compression area difference of the second main valve plug piston 7a both sides, thus the both sides of the second main valve plug piston 7a have just formed differential circuit, control the motion of second main valve plug 7 thus, so just can cancel Returnning spring, realize that gas resets.

As shown in Figure 6, the air supply opening that is positioned at the miniature solenoid valve 5 of second side plate, 3 one sides is communicated with pilot stage pressure chamber 22, the working hole of miniature solenoid valve 5 is communicated with second-hand's movable valve plug active chamber second sub-chamber 37b, and the relief opening of miniature solenoid valve 5 is communicated with the second pilot stage exhaust cavity 19.

Further introduce working procedure of the present utility model below in conjunction with each accompanying drawing:

After connecting bleed pressure, bleed pressure just acts on the air supply opening and first-hand movable valve plug first pressure chamber 26 and second-hand's movable valve plug first pressure chamber 27 of two miniature solenoid valve 5 by primary pressure chamber 23 and pilot stage pressure chamber 22.This moment, bleed pressure just acted in the second sub-chamber 34b of the first main piston chamber by first-hand movable valve plug first pressure chamber 26, first piston exhaust cavity 20, promoted first main valve plug 6 to left movement; Act in the second sub-chamber 35b of the second main piston chamber by second-hand's movable valve plug first pressure chamber 27, the second piston exhaust cavity 21 at the opposite side bleed pressure, promote second main valve plug 7 and move right.This moment, first main valve plug 6 was in position, a left side, and second main valve plug 7 is in right position, was the original state of valve.

The miniature solenoid valve 5 in left side when electric, small piston in the left side miniature solenoid valve 5 moves to left, and bleed pressure is acted in the first sub-chamber 34a of the first main piston chamber by the first passage 45 and the first side plate internal channel 44 in pilot stage pressure chamber 22, left side miniature solenoid valve 5, the first-hand movable valve plug active chamber second sub-chamber 36b, first-hand movable valve plug second pressure port 30, first-hand movable valve plug second pressure chamber 28, the valve body.At this moment, the effect of pressure is arranged also in the second sub-chamber 34b of the first main piston chamber, but the compression area of the first main piston chamber, the first sub-chamber 34a has formed differential circuit greater than the first main piston chamber, the second sub-chamber 34b, therefore promoted first main valve plug 6 and move right.At this moment, first main valve plug 6 is in right position, be the utility model double spool valve left side miniature solenoid valve 5 the working state when electric.

The miniature solenoid valve 5 on right side when electric, small piston in the right side miniature solenoid valve 5 moves to right, and bleed pressure is acted in the first sub-chamber 35a of the second main piston chamber by the second channel 47 and the second side plate internal channel 46 in pilot stage pressure chamber 22, right side miniature solenoid valve 5, second-hand's movable valve plug active chamber second sub-chamber 37b, second-hand's movable valve plug second pressure port 33, second-hand's movable valve plug second pressure chamber 29, the valve body.At this moment, the effect of pressure is arranged also in the second sub-chamber 35b of the second main piston chamber, but the compression area of the second main piston chamber, the first sub-chamber 35a has formed differential circuit greater than the second main piston chamber, the second sub-chamber 35b, therefore promoted second main valve plug 7 to left movement.At this moment, second main valve plug 7 is in left side position, be the utility model double spool valve right side miniature solenoid valve 5 the working state when electric.

Because the work of first main valve plug 6 and second main valve plug 7 is separate, therefore two miniature solenoid valve 5 can be independent electric also can be simultaneously.

Wherein, the working procedure of first-hand movable valve plug 11 and second-hand's movable valve plug 12 is as follows:

When two miniature solenoid valve 5 proper functioning, need not to press first-hand movable valve plug 11 or second-hand's movable valve plug 12.

If left side miniature solenoid valve 5 can't be worked, then can promote first-hand movable valve plug 11 and move right, bleed pressure is acted in the first sub-chamber 34a of the first main piston chamber by the first passage 45 and the first side plate internal channel 44 in primary pressure chamber 23, pilot stage pressure chamber 22, first-hand movable valve plug first pressure chamber 26, first-hand movable valve plug first pressure port 31, the first-hand movable valve plug active chamber second sub-chamber 36b, first-hand movable valve plug second pressure port 30, first-hand movable valve plug second pressure chamber 28, the valve body.This moment, the working hole of left side miniature solenoid valve 5 was communicated with the first-hand movable valve plug active chamber first sub-chamber 36a, was in the state of sealing.After this working procedure just with left side miniature solenoid valve 5 the working procedure when electric is in full accord.

In addition, if right side miniature solenoid valve 5 can't be worked, then can promote second-hand's movable valve plug 12 and move right, bleed pressure is acted in the first sub-chamber 35a of the second main piston chamber by the second channel 47 and the second side plate internal channel 46 in primary pressure chamber 23, pilot stage pressure chamber 22, second-hand's movable valve plug first pressure chamber 27, second-hand's movable valve plug first pressure port 32, second-hand's movable valve plug active chamber first sub-chamber 37a, second-hand's movable valve plug second pressure port 33, second-hand's movable valve plug second pressure chamber 29, the valve body.The working hole of right side miniature solenoid valve 5 is communicated with second-hand's movable valve plug active chamber second sub-chamber 37b at this moment, is in the state of sealing.After this working procedure just with right side miniature solenoid valve 5 the working procedure when electric is in full accord.

Claims

1. double spool valve that is used for the pneumatic valve island, it comprises valve body (1), first side plate (2), second side plate (3) and two miniature solenoid valve (5), the operative end surface (1a) of described valve body (1) is relative with control end face (1b), described two miniature solenoid valve (5) are fixedly mounted on the control end face (1b) of valve body (1), described first side plate (2) and second side plate (3) correspondingly are fixedly connected with first side (1c) and second side (1d) of valve body (1) respectively, and first side (1c) of described valve body (1) is relative with second side (1d); It is characterized in that: be provided with the first main exhaust chamber (16) in the described valve body (1), the second main exhaust chamber (17), the first pilot stage exhaust cavity (18), the second pilot stage exhaust cavity (19), first piston exhaust cavity (20), the second piston exhaust cavity (21), pilot stage pressure chamber (22), primary pressure chamber (23), first active chamber (24), second active chamber (25), first-hand movable valve plug first pressure chamber (26), second-hand's movable valve plug first pressure chamber (27), first-hand movable valve plug second pressure chamber (28), second-hand's movable valve plug second pressure chamber (29), first-hand movable valve plug second pressure port (30), first-hand movable valve plug first pressure port (31), second-hand's movable valve plug first pressure port (32), second-hand's movable valve plug second pressure port (33), first-hand movable valve plug active chamber, second-hand's movable valve plug active chamber, main valve plug first active chamber (38) and main valve plug second active chamber (39); The outlet of described first active chamber (24) and second active chamber (25) is positioned on the operative end surface (1a) of valve body (1); The described first main exhaust chamber (16), the second main exhaust chamber (17), the first pilot stage exhaust cavity (18), the second pilot stage exhaust cavity (19), pilot stage pressure chamber (22) and primary pressure chamber (23) run through valve body (1) along a junction surface of valve body (1) to another junction surface direction separately; Described main valve plug first active chamber (38) and main valve plug second active chamber (39) lay respectively at the both sides of primary pressure chamber (23), and main valve plug first active chamber (38), main valve plug second active chamber (39) and primary pressure chamber (23) are interconnected; The described first main exhaust chamber (16) is communicated with first active chamber (24) by main valve plug first active chamber (38), and the described second main exhaust chamber (17) is communicated with second active chamber (25) by main valve plug second active chamber (39); Be provided with the first main piston chamber in described first side plate (2), be provided with the second main piston chamber in described second side plate (3) accordingly, be slidingly fitted with the first main valve plug piston (6a) and the second main valve plug piston (7a) in the described first main piston chamber and the second main piston chamber respectively, the described first main piston chamber is separated into first sub-chamber (34a), the first main piston chamber and the second sub-chamber (34b), the first main piston chamber by the first main valve plug piston (6a), and the second main piston chamber is separated into first sub-chamber (35a), the second main piston chamber and the second sub-chamber (35b), the second main piston chamber by the second main valve plug piston (7a); First main valve plug (6) runs through main valve plug first active chamber (38), second main valve plug (7) runs through main valve plug second active chamber (39), and first main valve plug (6), second main valve plug (7) form with valve body (1) respectively and are slidingly matched, one end of first main valve plug (6) is fixedlyed connected with the first main valve plug piston (6a), and an end of second main valve plug (7) is fixedlyed connected with the second main valve plug piston (7a); The outlet of described second-hand's movable valve plug active chamber is positioned on first side (1c) of valve body (1), be slidingly fitted with second-hand's movable valve plug (12) in second-hand's movable valve plug active chamber, form second-hand's movable valve plug active chamber first sub-chamber (37a) and the second-hand's movable valve plug active chamber second sub-chamber (37b) that isolates mutually between the inwall of second-hand's movable valve plug active chamber and the second-hand's movable valve plug (12); The outlet of described first-hand movable valve plug active chamber is positioned on first side (1c) of valve body (1), be slidingly fitted with first-hand movable valve plug (11) in the first-hand movable valve plug active chamber, form first-hand movable valve plug active chamber first sub-chamber (36a) and the first-hand movable valve plug active chamber second sub-chamber (36b) that isolates mutually between the inwall of first-hand movable valve plug active chamber and the first-hand movable valve plug (11); Described primary pressure chamber (23) is communicated with pilot stage pressure chamber (22); Described pilot stage pressure chamber (22) is communicated with first-hand movable valve plug first pressure chamber (26); Described first-hand movable valve plug first pressure chamber (26) is communicated with first-hand movable valve plug active chamber by first-hand movable valve plug first pressure port (31); The described first-hand movable valve plug active chamber second sub-chamber (36b) is communicated with first-hand movable valve plug second pressure chamber (28) by first-hand movable valve plug second pressure port (30); Described first-hand movable valve plug second pressure chamber (28) is communicated with the first sub-chamber (34a), the first main piston chamber; The second sub-chamber (34b), the described first main piston chamber is communicated with first piston exhaust cavity (20); Described first piston exhaust cavity (20) is communicated with first-hand movable valve plug first pressure chamber (26); Described pilot stage pressure chamber (22) is communicated with second-hand's movable valve plug first pressure chamber (27); Described second-hand's movable valve plug first pressure chamber (27) is communicated with second-hand's movable valve plug active chamber first sub-chamber (37a) by second-hand's movable valve plug first pressure port (32); Described second-hand's movable valve plug active chamber is communicated with second-hand's movable valve plug second pressure chamber (29) by second-hand's movable valve plug second pressure port (33); Described second-hand's movable valve plug second pressure chamber (29) is communicated with the first sub-chamber (35a), the second main piston chamber; The second sub-chamber (35b), the described second main piston chamber is communicated with the second piston exhaust cavity (21); The described second piston exhaust cavity (21) is communicated with second-hand's movable valve plug first pressure chamber (27); The air supply opening of one of them miniature solenoid valve (5) is communicated with pilot stage pressure chamber (22), the working hole of this miniature solenoid valve (5) is communicated with first-hand movable valve plug active chamber, and the relief opening of this miniature solenoid valve (5) is communicated with the first pilot stage exhaust cavity (18); The air supply opening of another miniature solenoid valve (5) is communicated with pilot stage pressure chamber (22), the working hole of this miniature solenoid valve (5) is communicated with second-hand's movable valve plug active chamber second sub-chamber (37b), and the relief opening of this miniature solenoid valve (5) is communicated with the second pilot stage exhaust cavity (19).

2. the double spool valve that is used for the pneumatic valve island according to claim 1 is characterized in that: the area of the described first main valve plug piston (6a) is the twice of the attachment portion area of the first main valve plug piston (6a) and first main valve plug (6); The area of the described second main valve plug piston (7a) is the twice of the attachment portion area of the second main valve plug piston (7a) and second main valve plug (7).

3. the double spool valve that is used for the pneumatic valve island according to claim 1 and 2, it is characterized in that: described second-hand's movable valve plug (12) along its axially spaced-apart be provided with two circumferential circular grooves, between described circular groove and second-hand's movable valve plug active chamber, form the second-hand's movable valve plug active chamber first sub-chamber (37a) and the second-hand's movable valve plug active chamber second sub-chamber (37b) that isolate mutually.

4. the double spool valve that is used for the pneumatic valve island according to claim 1 and 2, it is characterized in that: described first-hand movable valve plug (11) along its axially spaced-apart be provided with two circumferential circular grooves, between described circular groove and first-hand movable valve plug active chamber, form the first-hand movable valve plug active chamber first sub-chamber (36a) and the first-hand movable valve plug active chamber second sub-chamber (36b) that isolate mutually.

5. the double spool valve that is used for the pneumatic valve island according to claim 1 and 2, it is characterized in that: described first-hand movable valve plug first pressure port (31) is located in first-hand movable valve plug first pressure chamber (26), described first-hand movable valve plug second pressure port (30) is located in first-hand movable valve plug second pressure chamber (28), described second-hand's movable valve plug first pressure port (32) is located in second-hand's movable valve plug first pressure chamber (27), and described second-hand's movable valve plug second pressure port (33) is located in second-hand's movable valve plug second pressure chamber (29).