CN2138724Y

CN2138724Y - Two position two way electromagnetic valve

Info

Publication number: CN2138724Y
Application number: CN 92243468
Authority: CN
Inventors: 唐建民
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-12
Filing date: 1992-12-12
Publication date: 1993-07-21
Anticipated expiration: 2002-12-12

Abstract

The utility model relates to a two position two way electromagnetic valve for the mechanical equipment with washing bottle filling production lines for medicines and foods. The both ends of a push rod (7) are respectively matched with an armature iron core (2) and a valve core, so when an electric magnet has electricity, the first valve core (24) is driven, and the valve is opened. A second valve core can be arranged between the first valve core (24) and a valve seat. The electromagnetic valve has long service life, the working time of the electromagnetic valve is more than 10<7>.

Description

Two position two way electromagnetic valve

The utility model relates to a kind of two-position two-way solenoid valve, and it is widely used in the machinery of medicine, food wash bottle, can production line, is suitable for the break-make of pilot line flowing medium.

Existing two-position two-way solenoid valve all is the plane type seal spool structure that adopts pull-type electromagnet, rubber and metal composite, and during the electromagnet energising, armature iron core and spool move upward simultaneously.The solenoid valve of this kind structure, in the frequent occasion of work number of times, in the machinery as medical wash bottle production line, frequency of okperation is 1 time/second, and worked at least 16 hours every day, and electromagnet repeatedly clashes into armature guide sleeve upper end portion fast, about 5 to more than 10 days time, armature guide sleeve weld bond place phenomenon of rupture will take place, so that can't use, seriously influenced user's working efficiency and economic benefit.

Thus, the purpose of this utility model provides a kind of two-position two-way solenoid valve of long working life, thereby has solved the short problem of said structure solenoid valve operating life.

In solenoid valve described in the utility model, comprise a pushing-type electromagnet and the valve body that to dismantle mutually, the one sealing guide sleeve that has a center hole is set in described valve body, the hole that one push rod passes on the valve body of described sealing guide sleeve and this cover lower end slidably enters upper chamber, the upper end of described push rod is against living armature iron core lower end, its lower end is pressed on first spool that is arranged in the lower chambers, described spool has a trochoidal surface, this surface or with the valve seat mating reaction, in the lower end of spool one helical spring is housed, the force direction of this spring with when the pushing-type electromagnet is switched on, make the moving direction of described armature iron core opposite.

One top is set in described lower chambers has conical surface and bottom that second spool of cylndrical surface is arranged, it has one with the center hole of the conical surface mating reaction of described first spool and be communicated with lower chambers and the throttle orifice of import, be subjected to the flowing through effect of import medium of the part of the described second spool conical surface.

In described sealing guide sleeve, have an atria and a guide sleeve drain boles, in valve body, also have a valve body drain boles that aligns with the guide sleeve drain boles.

The pushing-type solenoid valve that the utility model is addressed, owing to avoided the operating mode of the frequent bump fast of armature iron core armature guide sleeve, thus having prolonged the working life of this solenoid valve significantly, its work number of times is greater than 10 ⁷

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.

Fig. 1 is the sectional view of the utility model solenoid valve

Fig. 2 is another embodiment's of the utility model solenoid valve a partial sectional view

Wherein:

1 pushing-type electromagnet, 2 armature iron cores, 3 flange-type armature guide sleeves

4 drain chamber 5 drain boles 6 " O " shape seal rings

7 push rods, 8 valve body upper chamber, 9 valve bodies

10 second valve valve ports, the 11 first valve circle conical surfaces, the 12 second valve circle conical surfaces

13 throttle orifices, 14 imports, 15 springs

16 valve body lower chambers, 17 plug screw 18 " O " shape seal rings

Space 21 spring seats are adjusted in 19 plug screw spanner spaces 20

22 pilot holes, 23 second spools, 24 first spools

25 first valve valve ports, 26 outlets, 27 packing rings

28 " O " shape seal ring, 29 sealing guide sleeves

30 screw threads, 31 screws, 32 connection plugs

As shown in Figure 1, the pushing-type electromagnet 1 of the utility model solenoid valve and valve body 9 are connected as a single entity by screw 31.Described pushing-type electromagnet 1 comprises an armature iron core 2 and a flange-type armature guide sleeve 3, and armature iron core 2 is housed in the center hole of described guide sleeve 3 slidably.Described valve body 9 has an import 14, an outlet 26, upper chamber 8, the sealing guide sleeve 29 of band shoulder hole is housed in the upper end of valve body 9, hole that the diameter of described guide sleeve 29 is bigger and flange-type armature guide sleeve 3 form one and drain chamber 4, by drain boles 5 corresponding on radial hole on this guide sleeve and the valve body described drainage chamber 4 are communicated with atmosphere.In described guide sleeve 29 and in the valve body hole of this cover lower end, pass a push rod 7 slidably, the upper end of this push rod props up on the lower end surface of armature iron core 2, its lower end is pressed on first spool 24 that supports by spring 15, described spool 24 has a conical surface 11, this conical surface 11 and second spool 23 are arranged in the lower chambers 16 and by pilot hole 22 and lead, be provided with a conical surface 12 in the upper end of this spool 23, it and valve seat mating reaction have a throttle orifice 13 that is communicated with lower chambers 16 and import 14 on described spool 23.

Described sealing guide sleeve 29 is provided with O-

ring seals

6,28 and packing ring 27, makes screw mouth 30 above this guide sleeve 29, so that dismounting.

By the drainage structure that radial hole of offering on the sealing guide sleeve 29 and valve body drain boles 5 constitute, can't discharge and make its movement parts such as the motion of armature iron core to be provided with flexibly in the described chamber 4 in order to prevent that medium from flowing to.

The underpart of described push rod 7 is littler than the diameter of upper end portion, and to increase the MEDIA FLOW flux at valve port place, the upper-end surface and the lower end surface of described push rod 7 are hemisphere.

In the lower end of valve body 9 plug screw 17 is set, between this plug screw 17 and valve body 9, leaves an adjustable gap 29, the pretightening force that can come Regulation spring 15 by six side spaces 19 by six side's spanners.The upper end built-in spring seat 21 of described plug screw 17, and be provided with O-ring seals 18, described six side spaces are positioned at the lower end of plug screw 17.

The action of described solenoid valve following (with reference to Fig. 1), when the pushing-type electromagnet was not switched on, armature iron core 2 was in illustrated free state.When pushing-type magnet is switched on, armature iron core 2 is under the action of a magnetic field, by the push rod 7 downward pressure mediums that push first spools 24 and overcome the elastic force and the lower chambers 16 of spring 15, the valve port 25 of 23 of the conical surface 11 of first spool 24 and second spools is opened, pressure medium in the lower chambers 16 is lower than the pressure at import 14 places, pressure under this pressure reduction acts on the annular useful area of conical surface 12 of second spool 23, second spool 23 is moved downward along pilot hole 22, valve port 10 is opened, make big flow medium arrive outlet 26 through valve port 10 to upper chamber 8, thereby increased circulation area, the medium in the pipeline is in connected state at this moment.

When the pushing-type electromagnet cuts off the power supply, no the action of a magnetic field, armature iron core 2 is in free state, first spool 24 is under the effect of spring 15, move upward, and close port 25, increased pressure in the lower chambers 16, this pressure acts on the circular useful area in lower end of second spool 23, act on power that second spool makes progress greater than downward power, make second spool 23 move upward close port 10, at this moment, the medium in this pipeline is in cut-off state.

Among second embodiment as described in Figure 2, just the conical surface 11 direct and valve seat mating reactions of first spool, other structure and above-mentioned described identical, its uses the occasion at tubule road latus rectum.

Described valve body, spool, push rod, spring, plug screw, sealing guide sleeve are stainless steel material.

In described pushing-type electromagnet, flange-type armature guide sleeve need be done chromium plating or Nickel Plating Treatment, and described pushing-type electromagnet can adopt exchange of paper integer, once-through type, flame-proof type and different electric pressures as required.

External wire can be connected on the plug 32.

Claims

1, a kind of two-position two-way solenoid valve, comprise valve body, seal element, spool and exchange of paper integer, once-through type, the electromagnet of flame-proof type and different electric pressures, this electromagnet has the armature iron core and through the armature guide sleeve of chromium plating or Nickel Plating Treatment, it is characterized in that, comprise a push rod (7), the lower end of armature iron core (2) is stated in the upper end of described push rod (7) against the residence, the lower end of push rod (7) is pressed on first spool (24) that is arranged in the lower chambers (16), described first spool (24) have one or with the conical surface (11) of valve seat mating reaction, in the lower end of first spool (24) helical spring (15) is housed, described electromagnet (1) is the pushing-type electromagnet.

2, solenoid valve as claimed in claim 1, it is characterized in that, one top is set in described lower chambers (16) has second spool (23) that conical surface (12) and bottom have the cylndrical surface, it has one with the center hole of described first spool conical surface (11) mating reaction and be communicated with lower chambers (16) and the throttle orifice (13) of import (14), the part of the described second spool conical surface is subjected to the effect from the import medium, have a pilot hole (22) in the described valve body (9), described second spool (23) is contained in this pilot hole (22) slidably.

3, solenoid valve as claimed in claim 1 or 2, it is characterized in that, have one by sealing the atria (4) that guide sleeve (29) and flange-type armature guide sleeve form on the top of valve body (9), on described guide sleeve (29), be provided with a drain boles, on valve body (9), has drain boles (5), the drain boles of described guide sleeve (29) is communicated with drain boles (5), makes atria (4) be communicated with atmosphere.

4, solenoid valve as claimed in claim 1 or 2 is characterized in that, the underpart of described push rod (7) is littler than upper end portion diameter.

5, solenoid valve as claimed in claim 4 is characterized in that, the upper-end surface and the lower end surface of described push rod (7) are hemisphere.

6, solenoid valve as claimed in claim 1 or 2 is characterized in that, is shaped on screw mouth (30) in the top of sealing guide sleeve (29).

7, solenoid valve as claimed in claim 1 or 2, it is characterized in that, be provided with a plug screw (17) in the lower end of valve body, the intrinsic spring seat (21) in the upper end of this plug screw, described spring (15) are bearing between first spool (24) lower end and this spring seat (21).

8, solenoid valve as claimed in claim 7 is characterized in that, leaves one or six side spaces in the lower end of described plug screw (17), leaves an adjustable gap (20) between plug screw (17) and valve body (9)