CN105090559B - Cut-off type two-position-five-way solenoid valve - Google Patents

Abstract

The cut-off two-position five-way solenoid valve disclosed by the present invention includes a valve body, a valve seat and an end cover. A valve cavity is formed between the valve body, the valve seat and the end cover. A valve stem is movable in the valve cavity. The wall is provided with a first exhaust port, a first air outlet, an air inlet, a second air outlet and a second exhaust port; There is a first cut-off port between the air outlet and the second exhaust port; a sealing ring is fixedly connected to the middle of the valve stem, a second cut-off port is arranged between the air inlet and the second air outlet, and the top of the valve core is provided with a In the third cut-off port, the bottom end of the valve stem extends into the valve core and is fixedly connected with a sealing seat, and the middle part of the valve core is provided with a fourth cut-off port; a first spring is provided between the seal seat and the end cap. The invention has the advantages of simple and reasonable structure, low manufacturing cost, long service life, high sensitivity and good sealing performance, and can be applied to large flow applications.

Description

Cut-off two-position five-way solenoid valve

technical field

The invention relates to the technical field of valves, in particular to a cut-off two-position five-way solenoid valve.

Background technique

Valve products are widely used in fluid control in various technical fields, and two-position five-way solenoid valve is one of them, which is well known by people. At present, most of the common two-position five-way solenoid valves on the market are spool-type structures. The structure is mainly to set a number of flat rings on the valve stem, and set a number of nodes corresponding to the flat rings on the inner wall of the valve body. By driving the valve stem to move along its axial direction, the contact or disengagement between the flat ring and the corresponding node is used to realize the on-off of the flow channel. The main disadvantage of this spool type two-position five-way solenoid valve is that the sliding part of the valve stem needs precision machining, which increases the manufacturing cost, and its reversing stroke is long, which cannot be applied to large flow applications; The column type 2-position 5-way solenoid valve is sensitive to the medium. If the filtration, lubrication and maintenance of the pneumatic system are not handled properly, the service life and action sensitivity of the valve will be seriously affected.

Contents of the invention

The object of the present invention is to aim at the defects and deficiencies of the prior art, and provide a large flow cut-off type two-position five-way solenoid valve with simple and reasonable structure, low manufacturing cost, long service life, high sensitivity and good sealing performance. .

To achieve the above object, the present invention adopts the following technical solutions:

The cut-off two-position five-way solenoid valve of the present invention includes a valve body, valve seats and end caps respectively arranged at both ends of the valve body, and a valve body is formed between the valve body, the valve seat and the end caps. There is a valve cavity, and a valve rod is movable in the valve cavity, and the wall of the valve body is provided with a first exhaust port, a first air outlet, The air inlet, the second air outlet and the second exhaust port, the valve seat is respectively provided with an air guide hole and a control air hole, and the valve body is formed with the valve seat to communicate with the air guide hole and the inlet. The gas channel of the gas port, the control air hole is connected with the valve cavity, and the valve seat is provided with a pilot assembly for controlling the conduction or cut-off of the air guide hole and the control air hole;

The valve cavity is embedded with a valve core sealingly fitted with the inner wall of the valve body, the inside of the valve core is hollow, and the valve core is arranged between the valve body and the end cover; The valve core is respectively provided with a first through hole and a second through hole, the first exhaust port communicates with the valve cavity through the first through hole, and the first air outlet communicates with the valve cavity. The cavity is connected through the second through hole; the top end of the valve rod is fixedly connected with a piston, and a valve is provided between the second air outlet and the second exhaust port to seal the lower end surface of the piston. The first cut-off port; the middle part of the valve stem is fixedly connected with a sealing ring, and a second cut-off port sealingly matched with the upper end surface of the sealing ring is arranged between the air inlet and the second air outlet, so that The top end of the valve core is provided with a third cut-off port sealingly matched with the lower end surface of the sealing ring, and the third cut-off port is located between the first air outlet and the air inlet; The bottom end protrudes into the valve core and is fixedly connected with a sealing seat. The middle part of the valve core is provided with a fourth cut-off port that is sealingly matched with the upper end surface of the seal seat. The fourth cut-off port is located on the A first spring is arranged between the first exhaust port and the first air outlet; between the sealing seat and the end cover.

Further, the pilot assembly includes a sleeve, a moving iron core, a static iron core and a coil assembly, the bottom end of the sleeve is fixedly connected to the valve seat through a pressure plate, and the moving iron is movably arranged in the sleeve core, the static iron core is fixedly arranged, a second spring is arranged between the moving iron core and the sleeve, and the coil assembly is wound on the outer wall of the sleeve and electrically connected to the junction box; The upper end surface of the valve seat is provided with a boss, and the boss is provided with the air guide hole in the axial direction, and the bottom end of the moving iron core is provided with a first plug sealingly matched with the boss; The static iron core is provided with an exhaust channel along the axial direction, and the top end of the moving iron core is provided with a second plug sealingly fitted with the exhaust channel.

Further, a manual lever for manually driving the moving iron core is arranged laterally on the side wall of the valve seat.

Further, the piston includes a base body fixedly connected to the valve stem, the base body is covered with a first sealing sleeve, and an upper sealing ring with an upward opening extends from the upper peripheral wall of the first sealing sleeve, so that A lower sealing ring with an opening downward extends from the middle peripheral wall of the first sealing sleeve, and both the upper sealing ring and the lower sealing ring are in sealing fit with the inner wall of the valve body.

Further, the outside of the sealing seat is covered with a second sealing sleeve, and the sealing seat is sealingly engaged with the fourth cut-off opening through the second sealing sleeve.

Further, "O" rings are embedded between the upper and middle outer walls of the valve core and the valve body, and between the end cover and the valve body.

Further, the end cover is axially provided with a guide groove corresponding to the valve stem.

The beneficial effects of the present invention are: the present invention sets a valve core in the valve cavity of the valve body, and the valve core is respectively provided with a first through hole for communicating with the first exhaust port and the valve cavity, and for communicating with the first air outlet. It is connected with the second through hole of the valve cavity, and the valve body is provided with a first cut-off port sealingly matched with the piston and a second cut-off port sealed with the upper end surface of the sealing ring, and a lower cut-off port with the sealing ring is set on the valve core. The third cut-off port with the sealing fit of the end face and the fourth cut-off port with the upper end face of the sealing seat are sealed. When working, the valve stem moves and drives the piston, the sealing ring and the sealing seat to seal or separate from the corresponding cut-off port respectively, so as to realize the gas Road switching.

Compared with the existing spool-type two-position five-way solenoid valve, the present invention adopts a cut-off sealing structure, which has low requirements on the air source during operation, a longer service life, a shorter reversing stroke, higher sensitivity, and tight sealing. Good performance, can be effectively applied to the application of large flow; the invention not only facilitates assembly by embedding the valve core in the valve body, but also effectively reduces the The number of cut-off ports in the valve body is reduced, which makes the processing more convenient, thereby reducing the manufacturing cost; in addition, the piston, sealing ring and valve core of the present invention are all made of polyester materials, which have better wear resistance and durability. Strong, better sealing effect, more stable working performance.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

In Figure 1:

1. Valve body; 11. First exhaust port; 12. First air outlet; 13. Air inlet; 14. Second air outlet; 15. Second exhaust port; 16. First cut-off port; 17. 2. Valve seat; 21. Air guide hole; 22. Control air hole; 23. Gas channel; 24. Boss; 25. Manual lever; 3. End cover; 31. Guide groove; 4. Valve cavity; 5, valve stem; 51, piston; 511, substrate; 512, the first sealing sleeve; 513, upper sealing ring; 514, lower sealing ring; 52, sealing ring; 53, sealing seat; 54, the first spring; 55, 61, casing; 62, moving iron core; 621, first plug; 622, second plug; 63, static iron core; 631, exhaust channel; 64, coil assembly; 65, pressure plate ; 66, the second spring; 67, the junction box; 7, the spool; 71, the first through hole; 72, the second through hole; 73, the third cut-off port; 74, the fourth cut-off port; 75, "O" Shaped circle.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

The cut-off two-position five-way solenoid valve shown in Figure 1 includes a valve body 1, a valve seat 2 and an end cover 3 respectively arranged at both ends of the valve body 1, and a valve body 1, a valve seat 2 and an end cover 3 are formed. There is a valve chamber 4, a valve stem 5 is movable in the valve chamber 4, and the wall of the valve body 1 is provided with a first exhaust port 11 and a first air outlet 12 respectively connected with the valve chamber 4 at equal intervals from bottom to top. , the air inlet 13, the second air outlet 14 and the second exhaust port 15, the valve seat 2 is respectively provided with an air guide hole 21 and a control air hole 22, and the valve body 1 and the valve seat 2 are formed to communicate with the air guide hole 21 and the inlet The gas channel 23 of the air port 13 and the control air hole 22 communicate with the valve cavity 4 , and the valve seat 2 is provided with a pilot assembly for controlling the conduction or cutoff of the air guide hole 21 and the control air hole 22 .

The pilot assembly includes a casing 61, a moving iron core 62, a static iron core 63 and a coil assembly 64. The bottom end of the casing 61 is fixedly connected with the valve seat 2 through a pressure plate 65. A moving iron core 62, a fixed A static iron core 63 is provided, a second spring 66 is arranged between the moving iron core 62 and the casing 61, and the coil assembly 64 is wound on the outer wall of the casing 61 and electrically connected to the junction box 67; the upper end surface of the valve seat 2 A boss 24 is provided, and the boss 24 is provided with an air guide hole 21 along the axial direction, and the bottom end of the moving iron core 62 is provided with a first plug 621 which is sealingly matched with the boss 24; The air channel 631 , the top end of the moving iron core 62 is provided with a second plug 622 sealingly fitted with the exhaust channel 631 .

The valve cavity 4 is embedded with a valve core 7 which is sealingly matched with the inner wall of the valve body 1. The inside of the valve core 7 is hollow, and the valve core 7 is arranged between the valve body 1 and the end cover 3; the valve core 7 is respectively A first through hole 71 and a second through hole 72 are provided, the first exhaust port 11 communicates with the valve cavity 4 through the first through hole 71 , and the first gas outlet 12 communicates with the valve cavity 4 through the second through hole 72 The top of the valve rod 5 is fixedly connected with a piston 51, and the first cut-off port 16 that is sealingly matched with the lower end surface of the piston 51 is arranged between the second air outlet 14 and the second exhaust port 15; the middle part of the valve rod 5 is fixedly connected There is a sealing ring 52, a second cut-off port 17 that is sealingly matched with the upper end surface of the sealing ring 52 is provided between the air inlet 13 and the second air outlet 14, and the top end of the valve core 7 is provided with a sealing ring that is sealed with the lower end surface of the sealing ring 52. Coordinated third cut-off port 73, the third cut-off port 73 is located between the first air outlet 12 and the air inlet 13; the bottom end of the valve stem 5 extends into the valve core 7 and is fixedly connected with a sealing seat 53, the valve core The middle part of 7 is provided with the fourth cut-off port 74 that is sealed with the upper end surface of the seal seat 53, and the fourth cut-off port 74 is located between the first exhaust port 11 and the first air outlet 12; between the seal seat 53 and the end cover 3 A first spring 54 is arranged between them.

The working principle of the present invention is: in the initial state, the piston 51 is away from the first cut-off port 16, the sealing ring 52 is in sealing contact with the second cut-off port 17 and is away from the third cut-off port 73, and the sealing seat 53 is in sealing contact with the fourth cut-off port 74 , now the air inlet 13 is connected to the first outlet 12, the second outlet 14 is connected to the second outlet 15, and the first outlet 11 is in a closed state; when the coil assembly 64 is energized, the moving iron The core 62 is separated from the boss 24 under the action of magnetic force and is in close contact with the static iron core 63. At this time, the passage between the air guide hole 21 and the control air hole 22 is conducted, and the compressed gas in the air inlet 13 passes through the gas passage 23, The air guide hole 21 and the control air hole 22 enter the valve cavity 4, so that the piston 51 pushes the valve stem 5 to move down under the action of air pressure, so that the piston 51 is in sealing contact with the first cut-off port 16, and the sealing ring 52 is separated from the second cut-off port 17 and It is in sealing contact with the third cut-off port 73, and the sealing seat 53 is separated from the fourth cut-off port 74. At this time, the first exhaust port 11 is connected to the first gas outlet 12, the air inlet 13 is connected to the second gas outlet 14, and the second gas outlet 13 is connected to the second gas outlet 14. The second exhaust port 15 is in the closed state to realize the air circuit reversing operation; when the coil assembly 64 is powered off again, the moving iron core 62 is in sealing contact with the boss 24 again under the action of the second spring 66, and the air guide hole 21 is in contact with the control valve. The passage between the air holes 22 is cut off, the residual gas in the valve cavity 4 is discharged to the atmosphere through the control air hole 22 and the exhaust passage 631 in turn, and the sealing seat 53 drives the valve stem 5 to reset under the elastic force of the first spring 54, so that The air inlet 13 communicates with the first air outlet 12 , the second air outlet 14 communicates with the second exhaust port 15 , and the first exhaust port 11 is closed.

In order to facilitate the inspection and maintenance of the present invention, a manual lever 25 for manually driving the moving iron core 62 is arranged laterally on the side wall of the valve seat 2. When the manual lever 25 is moved, the inner end of the manual lever 25 urges the moving iron core 62 moves up, and then the air guide hole 21 is connected with the control air hole 22.

As a preferred embodiment of the present invention, the piston 51 includes a base body 511 that is fixedly connected to the valve stem 5. The outside of the base body 511 is covered with a first sealing sleeve 512. The upper peripheral wall of the first sealing sleeve 512 is extended with an opening upward. The upper sealing ring 513 and the lower sealing ring 514 with the opening extending downward extend from the middle wall of the first sealing sleeve 512 . By setting the piston 51 composed of the base body 511 and the first sealing sleeve 512, and respectively setting the upper sealing ring 513 and the lower sealing ring 514 on the outer periphery of the first sealing sleeve 512, the sealing effect is effectively improved, and the service life is longer. The performance is more stable.

In order to make the sealing effect between the sealing seat 53 and the fourth cut-off opening 74 better, the outside of the sealing seat 53 is covered with a second sealing sleeve 55, and the sealing seat 53 is sealed with the fourth closing opening 74 through the second sealing sleeve 55 .

"O" rings 75 are embedded between the upper and middle outer walls of the valve core 7 and the valve body 1, and between the end cover 3 and the valve body 1. By setting the "O" rings 75, gas leakage is effectively avoided. Occurrence improves the sealing effect.

The end cover 3 is provided with a guide groove 31 corresponding to the valve stem 5 along the axial direction. By setting the guide groove 31, the axiality of the movement of the valve stem 5 is effectively guaranteed, and the working performance of the present invention is further improved.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (7)

1. cut-off type two-position-five-way solenoid valve, including valve body, the valve seat and end cap that are respectively arranged at the valve body two ends, the valve Valve pocket is formed between body, the valve seat and the end cap, valve rod is movably set with the valve pocket, on the wall of the valve body certainly Spaced set has the first row gas port for being connected with the valve pocket respectively, the first gas outlet, air inlet, second to go out successively on down Gas port and second exhaust port, the valve seat are respectively arranged with gas port and control stomata, and the valve body coordinates shape with the valve seat Into the gas passage for having to connect the gas port and the air inlet, the control stomata is connected with the valve pocket, institute The first guide assembly for being provided with to control the gas port and the control stomata on or off on valve seat is stated, its feature exists In：

The valve element coordinated with the inner wall sealing of the valve body is embedded with the valve pocket, the inside of the valve element is in hollow setting, The valve element is supported and is located between the valve body and the end cap；First through hole and the second through hole are respectively arranged with the valve element, The first row gas port is connected with the valve pocket by the first through hole, and first gas outlet passes through institute with the valve pocket The second through hole is stated to be connected；The top of the valve rod is fixedly connected with piston, second gas outlet and the second exhaust port Between be provided with the first cut-off mouth coordinated with the sealing of the lower surface of the piston；Sealing is fixedly connected with the middle part of the valve rod Circle, is provided with the second cut-off coordinated with the upper surface sealing of the sealing ring between the air inlet and second gas outlet Mouthful, the top of the valve element is provided with the 3rd cut-off mouth coordinated with the lower surface sealing of the sealing ring, the 3rd cut-off Mouth is located between first gas outlet and the air inlet；The bottom of the valve rod is inserted into the valve element and is fixedly connected There is seal receptacle, be provided with the 4th cut-off mouth coordinated with the sealing of the upper surface of the seal receptacle in the middle part of the valve element, described the Four cut-off mouths are located between the first row gas port and first gas outlet；It is provided between the seal receptacle and the end cap First spring.

2. cut-off type two-position-five-way solenoid valve according to claim 1, it is characterised in that：The first guide assembly includes set Pipe, dynamic iron core, static iron core and coil block, the bottom of described sleeve pipe are fixedly connected by pressing plate with the valve seat, described sleeve pipe Inside it is movably set with the dynamic iron core, is fixedly installed the static iron core, is provided between the dynamic iron core and described sleeve pipe Two springs, the coil block is set around on the outer wall of described sleeve pipe and is electrically connected with terminal box；The upper surface of the valve seat sets Boss is equipped with, the boss is axially disposed the gas port, and the bottom of the dynamic iron core is provided with and is sealed with the boss The first chock plug for coordinating；The static iron core is axially disposed exhaust passage, and the top of the dynamic iron core is provided with and leads to exhaust The second chock plug that road sealing coordinates.

3. cut-off type two-position-five-way solenoid valve according to claim 2, it is characterised in that：On the side wall of the valve seat laterally It is provided with the hand lever for dynamic iron core action described in manual actuation.

4. cut-off type two-position-five-way solenoid valve according to claim 1, it is characterised in that：The piston includes and the valve The matrix that bar is fixedly connected, the outside of described matrix is coated with the first sealing shroud, prolongs on the top perisporium of first sealing shroud The upper sealing ring for there are opening upwards is stretched, the lower sealing ring that Open Side Down, institute are extended with the middle part perisporium of first sealing shroud Upper sealing ring and the lower sealing ring is stated to coordinate with the inner wall sealing of the valve body.

5. cut-off type two-position-five-way solenoid valve according to claim 1, it is characterised in that：The outside cladding of the seal receptacle There is the second sealing shroud, the seal receptacle is sealed with the described 4th cut-off mouth by second sealing shroud and coordinated.

6. cut-off type two-position-five-way solenoid valve according to claim 1, it is characterised in that：The top and middle part of the valve element Round section joint ring is embedded between outer wall and the valve body, between the end cap and the valve body.

7. cut-off type two-position-five-way solenoid valve according to claim 1, it is characterised in that：The end cap is axially disposed to be had With the gathering sill of the valve rod corresponding matching.