CN203348693U - Air exhaust electromagnetic valve - Google Patents
Air exhaust electromagnetic valve Download PDFInfo
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- CN203348693U CN203348693U CN 201320385249 CN201320385249U CN203348693U CN 203348693 U CN203348693 U CN 203348693U CN 201320385249 CN201320385249 CN 201320385249 CN 201320385249 U CN201320385249 U CN 201320385249U CN 203348693 U CN203348693 U CN 203348693U
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- valve
- valve body
- piston rod
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Abstract
The utility model discloses an air exhaust electromagnetic valve. The air exhaust electromagnetic valve comprises a valve body provided with valve elements and pilot valve assemblies arranged on the valve body. A valve cavity, an air exhaust cavity and a piston cavity are formed in the valve body. An air inlet communicated with the valve cavity is formed in the valve body. An air exhaust opening communicated with the air exhaust cavity is formed in the valve body. Each valve element comprises a piston rod, a piston, a sealing head and a resetting spring, wherein the piston rod is sleeved with the piston, the sealing head and the resetting spring. An end cap is arranged on the side end of the valve body. Each countersunk matched with one piston rod is formed in the end cap. The end cap is provided with air exhaust holes enabling the countersunks to be communicated with the valve cavity. End face threads are machined on the end face of each piston, so that a spiral air exhaust groove enabling the middle of the end face of each piston to be communicated with the edge of the end face of each piston is formed in the end face of each piston. The air exhaust electromagnetic valve is simple and reasonable in structure and enables the piston rods to move in a balanced mode, and therefore normal work of the air exhaust electromagnetic valve is guaranteed.
Description
Technical field
The utility model relates to the pneumatic element technical field, especially relates to a kind of exhaust solenoid valve.
Background technique
A kind of solenoid valve for the train train tail apparatus, as shown in Figure 1, comprise the valve body 20 that is provided with spool 10 and be located at the pilot valve assembly 30 on valve body 20, be provided with valve cavity 21 in valve body 20, exhaust cavity 22 and piston cavity 23, valve body 20 is provided with the suction port 24 be communicated with valve cavity 21 and the relief opening 25 be communicated with exhaust cavity 22, pilot valve assembly 30 is controlled the switching of the pressure channel between suction port 24 and piston cavity 23, spool 10 comprises piston rod 11 and is sheathed on successively the piston 12 on piston rod 11, sealing head 13 and Returnning spring 14, piston 12 is positioned at piston cavity 23, sealing head 13 is positioned at valve cavity 21, sealing head 13 is blocked or is communicated with exhaust cavity 22 for valve cavity 21.During use, suction port 24 is connected with the air main of train, make the air pressure in the train air main can enter in the valve cavity 21 of valve body 20, during the solenoid valve outage, pilot valve assembly 30 is in closed condition, therefore the thrust that the air pressure in valve cavity 21 produces and the active force of Returnning spring 14 make sealing head 13 fit tightly on the through hole between valve cavity 21 and exhaust cavity 22, to prevent that air pressure from leaking, now valve cavity 21 is in air-tight state.When the air main of train train tail apparatus needs air draft, the solenoid valve energising, pilot valve assembly 30 is in open mode, now pilot valve assembly 30 makes the air pressure in the train air main enter in the piston cavity 23 of valve body 20, owing between piston 12 and sealing head 13, existing area pressure poor, therefore the active force that piston 12 and sealing head 13 can overcome Returnning spring 14 oppositely moves, the through hole that makes sealing head 13 break away between valve cavity 21 and exhaust cavity 22, thus valve cavity 21 is communicated with and realizes air draft with exhaust cavity 22.The patent disclosed " for the solenoid valve of passenger train tail device " that can be CN102556108A referring to notification number about concrete structure and the working principle of the above-mentioned solenoid valve for the train train tail apparatus.
There are many defects in the above-mentioned solenoid valve for the train train tail apparatus because structural design is unreasonable: at first, the end cap 70 of valve body 20 is provided with counterbore 71, one end of piston rod 11 inserts in counterbore 71 and in the interior spacing movement of counterbore 71, because piston rod 11 is formed with closed chamber by the opening end shutoff of counterbore 71, the stable air pressure in this closed chamber can hinder piston rod 11 balances and move; Secondly, piston 12 is positioned at piston cavity 23, when interior edge face and the piston cavity 23 chamber walls of piston 12 fit tightly, because faying surface is comparatively smooth, easily sticks together, and can produce Adhesion force and back pressure, so can hinder piston rod 11 reset movement; Again, piston rod 11 is located in valve body 20 by three strong points, be respectively the pilot hole that counterbore 71, the bearing holes on piston cavity 23 chamber walls and piston 12 middle parts of end cap 70 radially contact with piston rod 11, because piston rod 11 supports by three strong points, easily because of production fitted position tolerance, produce frictional force and imbalance, therefore higher to the required precision of the coaxality tolerance of size of Assembly part, be unfavorable for processing.
Therefore be necessary that above-mentioned solenoid valve is improved.
Summary of the invention
The deficiency existed for above-mentioned prior art, the purpose of this utility model will provide a kind of exhaust solenoid valve, and solenoid valve described in the utility model, by the improvement of its structure, makes piston rod energy balance move, to ensure the solenoid valve normal operation.
To achieve these goals, the technological scheme that the utility model adopts is:
A kind of exhaust solenoid valve, comprise the valve body that is provided with spool and be located at the pilot valve assembly on valve body, be provided with valve cavity in valve body, exhaust cavity and piston cavity, valve body is provided with the suction port be communicated with valve cavity and the relief opening be communicated with exhaust cavity, the pilot valve assembly is controlled the switching of the pressure channel between suction port and piston cavity, spool comprises piston rod and is sheathed on the piston on piston rod, sealing head and Returnning spring, piston is positioned at piston cavity, sealing head is positioned at valve cavity, sealing head is blocked or is communicated with exhaust cavity for valve cavity, the side of valve body is provided with end cap, end cap is provided with the counterbore coordinated with piston rod, one end of piston rod inserts in counterbore, described end cap is provided with the exhaust port of counterbore and valve cavity conducting, the end face of described piston is processed with end-face helical, make on the end face of piston and be formed with the spiral helicine air vent with the conducting of piston end surface edge by the piston end surface middle part.
Wherein, the chamber wall of described piston cavity is provided with the bearing holes coordinated with described piston rod, and described piston rod stays in described valve body by described counterbore and 2 of described bearing holes.Described piston is provided with the pilot hole coordinated with described piston rod, and the internal diameter of described pilot hole is greater than the external diameter of described piston rod.The starting point of described end-face helical is positioned at the edge of described pilot hole, and the clearing end of described end-face helical is positioned at the edge of described piston end surface.
Wherein, described exhaust port radially is arranged on described end cap.
After adopting technique scheme, the advantage that compared to the prior art the utility model had is:
Exhaust solenoid valve described in the utility model, its end cap is provided with the exhaust port of counterbore and valve cavity conducting, and this exhaust port effect is to make the air pressure of counterbore and valve cavity to keep balance, makes piston rod freely to move swimmingly in counterbore; The end face of described piston is processed with end-face helical, make on the end face of piston and be formed with the spiral helicine air vent with the conducting of piston end surface edge by the piston end surface middle part, the end-face helical of piston end surface has reduced the area of contact of piston end surface and piston cavity, the formed air vent of piston end surface is conducive to exhaust, form air gap in the time of can preventing piston end surface and the laminating of piston cavity chamber wall, thereby can avoid producing back pressure, make piston rod energy balance move swimmingly.Further, solenoid valve described in the utility model increases the pilot hole of piston, need three strong points to be reduced to two strong points in piston rod in background technique, be that piston rod stays in valve body by counterbore and 2 of bearing holes, can avoid part to produce frictional force and imbalance because of production fitted position tolerance, be convenient to production and processing.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated:
The sectional structure schematic diagram that Fig. 1 is the described solenoid valve of background technique.
The sectional structure schematic diagram that Fig. 2 is solenoid valve of the present utility model.
The end-face structure schematic diagram that Fig. 3 is piston of the present utility model.
The sectional structure schematic diagram that Fig. 4 is piston of the present utility model.
The sectional structure schematic diagram that Fig. 5 is end cap of the present utility model.
In figure, 10: spool; 11: piston rod; 12: piston; 121: end-face helical; 122: air vent; 123: pilot hole; 13: sealing head; 14: Returnning spring; 20: valve body; 21: valve cavity; 22: exhaust cavity; 23: piston cavity; 24: suction port; 25: relief opening; 30: the pilot valve assembly; 31: first guide bracket; 32: coil; 33: pilot head; 34: nut; 40: bottom; 50: the copper mouth; 60: gland; 70: end cap; 71: counterbore; 72: exhaust port.
Embodiment
The following stated is only preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
Embodiment, see shown in Fig. 2 to Fig. 5: a kind of exhaust solenoid valve, comprise the valve body 20 that is provided with spool 10 and be located at the pilot valve assembly 30 on valve body 20, the lower end of valve body 20 is provided with bottom 40, be provided with valve cavity 21 in valve body 20, exhaust cavity 22 and piston cavity 23, valve body 20 is provided with the suction port 24 be communicated with valve cavity 21 and the relief opening 25 be communicated with exhaust cavity 22, suction port 24 and pilot valve assembly 30 are located at the upper end of valve body 20, be socketed with copper mouth 50 on suction port 24, pilot valve assembly 30 comprises the first guide bracket 31 of being located on valve body 20, pilot head 33, coil 32 and nut 34, pilot head 33, coil 32 and nut 34 are located on first guide bracket 31, first guide bracket 31 is fixedly connected with valve body 20 by hexagon socket cap head screw, pilot valve assembly 30 is controlled the switching of the pressure channel between suction port 24 and piston cavity 23, spool 10 comprises piston rod 11 and is sheathed on the piston 12 on piston rod 11, sealing head 13 and Returnning spring 14, valve body 20 is provided with the gland 60 coordinated with piston cavity 23, piston 12 is positioned at piston cavity 23, sealing head 13 is positioned at valve cavity 21, sealing head 13 is blocked or is communicated with exhaust cavity 22 for valve cavity 21, the side of valve body 20 is provided with end cap 70, Returnning spring 14 is located between end cap 70 and sealing head 13, end cap 70 is provided with the counterbore 71 coordinated with piston rod 11, one end of piston rod 11 inserts in counterbore 71, end cap 70 is provided with the exhaust port 72 with valve cavity 21 conductings by counterbore 71, exhaust port 72 radially is arranged on end cap 70, the end face of piston 12 is processed with end-face helical 121, make on the end face of piston 12 and be formed with the spiral helicine air vent 122 with piston 12 end face edge conductings by piston 12 end faces middle parts.
Further, the chamber wall of piston cavity 23 is provided with the bearing holes coordinated with piston rod 11, and piston rod 11 stays in valve body 20 by counterbore 71 and 2 of bearing holes.Piston 12 is provided with the pilot hole 123 coordinated with piston rod 11, and the internal diameter of pilot hole 123 is greater than the external diameter of piston rod 11, makes the diametric plane of piston rod 11 not contact with pilot hole 123.The starting point of end-face helical 121 is positioned at the edge of pilot hole 123, and the clearing end of end-face helical 121 is positioned at the edge of piston 12 end faces.
In the present embodiment, pilot valve assembly 30 is in parallel two groups, and spool 10 is two groups.The sealing configuration of the interior employing "O"-ring of valve body 20 or " Y " type circle, structure and the working principle of pilot valve assembly 30 are prior art known in those skilled in the art, no longer are described in detail.
Claims (5)
1. an exhaust solenoid valve, comprise the valve body (20) that is provided with spool (10) and be located at the pilot valve assembly (30) on valve body (20), be provided with valve cavity (21) in valve body (20), exhaust cavity (22) and piston cavity (23), valve body (20) is provided with the suction port (24) be communicated with valve cavity (21) and the relief opening (25) be communicated with exhaust cavity (22), spool (10) comprises piston rod (11) and is sheathed on the piston (12) on piston rod (11), sealing head (13) and Returnning spring (14), the side of valve body (20) is provided with end cap (70), end cap (70) is provided with the counterbore (71) coordinated with piston rod (11), it is characterized in that: described end cap (70) is provided with the exhaust port (72) with valve cavity (21) conducting by counterbore (71), the end face of described piston (12) is processed with end-face helical (121), make on the end face of piston (12) and be formed with spiral helicine air vent (122).
2. exhaust solenoid valve according to claim 1, it is characterized in that: the chamber wall of described piston cavity (23) is provided with the bearing holes coordinated with described piston rod (11), and described piston rod (11) stays in described valve body (20) by described counterbore (71) and 2 of described bearing holes.
3. exhaust solenoid valve according to claim 2, it is characterized in that: described piston (12) is provided with the pilot hole (123) coordinated with described piston rod (11), and the internal diameter of described pilot hole (123) is greater than the external diameter of described piston rod (11).
4. exhaust solenoid valve according to claim 3, it is characterized in that: the starting point of described end-face helical (121) is positioned at the edge of described pilot hole (123), and the clearing end of described end-face helical (121) is positioned at the edge of described piston (12) end face.
5. exhaust solenoid valve according to claim 1, it is characterized in that: described exhaust port (72) radially is arranged on described end cap (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320385249 CN203348693U (en) | 2013-06-28 | 2013-06-28 | Air exhaust electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320385249 CN203348693U (en) | 2013-06-28 | 2013-06-28 | Air exhaust electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203348693U true CN203348693U (en) | 2013-12-18 |
Family
ID=49748593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320385249 Expired - Lifetime CN203348693U (en) | 2013-06-28 | 2013-06-28 | Air exhaust electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203348693U (en) |
-
2013
- 2013-06-28 CN CN 201320385249 patent/CN203348693U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |