CN201373164Y

CN201373164Y - Solenoid valve

Info

Publication number: CN201373164Y
Application number: CN 200920116018
Authority: CN
Inventors: 金钜; 黄长金
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2009-03-23
Filing date: 2009-03-23
Publication date: 2009-12-30
Anticipated expiration: 2019-03-23

Abstract

The utility model discloses a solenoid valve, comprising a guide pipe and a valve body. The inner part of the guide pipe is provided with a core iron; the upper part of the guide pipe is provided with an attractor by means of compression; the valve body is provided with an air inlet end, an air outlet end and a valve opening arranged between the air inlet end and the air outlet end; the upper part of the core iron is provided with a small hole; the small hole is internally provided with a returning spring; the other end of the returning spring is connected to the attractor; the lower part of the core iron is provided with an installation hole; the installation hole is internally provided with a hard seal head; the upper part of the hard seal head is connected to the core iron by a compensating spring; and the lower part of the hard seal head is arranged above the valve opening. By adopting the hard seal head, the valve opening is continually struck when the solenoid valve works; match between the hard seal head and the valve opening gets better and better; the hard seal head can not be abraded and deformed; and even if the valve opening is concaved or the hard seal head is abraded, the compensating spring can also compress the hard seal head downward, so as to effectively compensate clearance generated between the hard seal head and the valve opening, keep leakage rate stabilized, and prolong the service life of the solenoid valve. The capability of the solenoid valve can not be obviously reduced after the solenoid valve is used for thousands of times.

Description

Solenoid valve

[technical field]

The utility model relates to solenoid valve, relates in particular to the solenoid valve that is used for refrigeration systems such as air-conditioning, freezing and refrigeration.

[background technique]

Be widely used in refrigeration system at present as shown in Figure 1 as the electromagnetic valve structure of controlling automatically, comprise and be connected in conduit coil and valve seat and the attractor of shutoff on conduit and the core iron that is positioned at conduit at two ends up and down, valve seat has import and outlet, has valve port between import and the outlet, the fixing sealing plug that cooperates with valve port in core iron lower end; Along with the conduction or the outage of coil, core iron moves up and down in conduit, sealing plug is left or the shutoff valve port, thereby being interconnected or closing of control import and outlet makes solenoid valve be in different working staties.

In the solenoid valve of this structure, sealing plug all is soft materials such as employing plastic cement, the sealing of soft material is plugged with certain elasticity, early stage Use Limitation fruit better, but, along with the continuous bump of soft material sealing plug and valve port, its wearing and tearing and distortion are serious, and extraordinary high temperature in the refrigeration system or low temperature environment all can quicken the distortion of soft material sealing plug.For addressing the above problem, some solenoid valve has adopted the sealing plug that is connected with damping spring, makes the bump of sealing plug and valve port obtain buffering, thus protection valve port and sealed member, and can regulate the required pretightening force of sealing by damping spring.Though this structure has been slowed down the wearing and tearing and the distortion of soft seal plug to a certain extent,, fundamentally do not solve wearing and tearing, the problem on deformation of soft seal plug.

And along with applying of refrigeration systems such as air-conditioning, freezing and refrigeration, solenoid valve is as the critical elements of control automatically, and its application is also increasingly extensive, yet along with the attention to environmental protection ideas, also more and more higher to performance demands such as solenoid valve noises.Present solenoid valve is when high frequency opens and closes, and core iron and attractor directly clash into, and core iron and valve directly clash into when closing, and the noise that bump produces between the metal is bigger, and surrounding environment is had a direct impact.

After the directly welding between present attractor and the conduit, millions of time or up to ten million times of switch, easily cause welding to come off between attractor and the conduit, solenoid valve is damaged, influenced the working life of solenoid valve greatly.

[summary of the invention]

The purpose of this utility model solves the problems of the prior art exactly, proposes a kind of solenoid valve, can avoid the wearing and tearing and the distortion of sealed member, prolongs the working life of solenoid valve.

For achieving the above object, the utility model proposes a kind of solenoid valve, comprise conduit and valve body, core iron is equipped with in the inside of described conduit, top is pressed with attractor, inlet end, outlet side are arranged on the valve body, be arranged on the valve port between inlet end and the outlet side, the top of described core iron has aperture, Returnning spring is housed in the aperture, the other end of Returnning spring is connected to attractor, and the bottom of core iron has mounting hole, and hard sealing head is housed in the mounting hole, the top of described hard sealing head is connected on the core iron by counterbalance spring, and the bottom places the valve port top.

As preferably, also be provided with gland around the side of described hard sealing head and between the core iron.

As preferably, described hard sealing head adopts steel ball.

As preferably, be provided with cushion pad between the top of described core iron and the below of attractor.

As preferably, have groove on the described attractor, locating point externally beaten by conduit or necking down cooperates with groove.

As preferably, the bottom of described attractor also is provided with divided magnetic ring.

As preferably, described valve body is provided with the buffering step, is provided with shock ring in the buffering step.

As preferably, the internal diameter of described valve port is less than the internal diameter of outlet side.

The beneficial effects of the utility model: the utility model adopts hard sealing head, constantly clash into valve port during work, the cooperation of hard sealing head and valve port is become better and better, hard sealing head can not wear and tear, be out of shape, even valve port depression or hard sealing head wearing and tearing, counterbalance spring also can be with hard sealing head toward pressing down, effectively compensate the gap that produces between hard sealing head and the valve port, it is stable that leakage rate keeps, and prolonged the working life of solenoid valve, and solenoid valve of the present utility model uses up to ten million back performances obviously not descend.

Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.

[description of drawings]

Fig. 1 is the structural representation of solenoid valve in the prior art;

Fig. 2 is the utility model solenoid valve embodiment one a structural representation;

Fig. 3 is the utility model solenoid valve embodiment two a structural representation.

[embodiment]

Embodiment one:

As shown in Figure 2, solenoid valve, comprise conduit 3 and valve body 7, core iron 5 is equipped with in the inside of described conduit 3, top is pressed with attractor 1, inlet end 11 is arranged on the valve body 7, outlet side 12, be arranged on the valve port 14 between inlet end 11 and the outlet side 12, the top of described core iron 5 has aperture, Returnning spring 4 is housed in the aperture, and the other end of Returnning spring 4 is connected to attractor 1, and the bottom of core iron 5 has mounting hole, hard sealing head 9 is housed in the mounting hole, the top of described hard sealing head 9 is connected on the core iron 5 by counterbalance spring 6, and the bottom places valve port 14 tops, also is provided with gland 8 around the side of described hard sealing head 9 and between the core iron 5.Hard sealing head 9 adopts the standard steel ball, is hard sealing.Constantly clash into valve port during valve work, the cooperation of steel ball and valve port is become better and better, and steel ball can not be out of shape, and it is stable that its leakage rate also keeps.The existing product sealing head all adopts soft material, and valve is through behind the multiple switching, and sealing head is out of shape gradually, and its amount of leakage can be increasing.So when up to ten million times of valve work, the superiority of the application's this structure has just embodied.The counterbalance spring 6 that is assemblied in hard sealing head 9 back has promptly absorbed most of power that hard sealing head 9 and valve port 14 bumps produce to reduce noise, and gap that also can compensation produces between the two after

valve port

14 and 9 wearing and tearing of hard sealing head makes valve port 14 keep sealing; And this valve is because tightr through cooperating after the long-term extruding between valve port 14 and the hard sealing head 9, thus its sealing can be along with the increase in life-span variation.

Be provided with cushion pad 13 between the below of the top of described core iron 5 and attractor 1.Cushion pad 13 is assemblied between core iron 5 and the attractor 1, and the vibrations major part that bump produces when making its high-frequency operation is cushioned pad and absorbs, and has eliminated noise greatly.

Have groove 15 on the described attractor 1, locating point externally beaten by conduit 3 or necking down cooperates with groove 15.Slot 15 on the attractor 1, the assembling back is played locating point or necking down and is cooperated with groove 15 in conduit 3 outsides, can strengthen the intensity after the welding between attractor and the conduit so greatly.Existing solenoid valve generally all directly adopts between attractor and the conduit and welds, and after up to ten million life-spans, the phenomenon that comes off can occur welding like this.

The bottom of described attractor 1 also is provided with divided magnetic ring 2.By the bottom at attractor 1 divided magnetic ring 2 is set, the magnetic flux separated into two parts that when operating current is Ac coil is produced produces phase difference, thereby magnetic pole each several part suction can not be zero simultaneously, eliminated the vibration of core iron, also just removed noise, made adhesive more stable simultaneously.

Described valve body 7 is provided with the buffering step, is provided with shock ring 10 in the buffering step.On the buffering step between core iron 5 and the valve body 7, shock ring 10 is set, can effectively prevents the noise that core iron 5 and valve body 7 bumps produce, also cushioned impact force greatly.

The internal diameter of described valve port 14 is less than the internal diameter of outlet side 12.Valve port 14 relative outlet sides 12 are smaller, can produce the gas whistle if fruit directly is connected with outlet side 12 with valve port 14, can send sharp-pointed noise as whistling.The principle that the application's structure adopts classification to amplify is provided with intermediate hole between valve port 14 and outlet side 12, its diameter less than outlet side 12, presents the ladder dress greater than valve port 14, and this structure can effectively prevent the generation at the gas whistle.

When valve was opened, core iron 5 was up carried, and cushion pad 13 can effectively stop the noise that collision produces between core iron 5 and the attractor 1; When valve cut out, core iron 5 moved down, and its most of impact force is absorbed by shock ring 10, and when hard sealing head 9 and valve port 14 bumps, counterbalance spring 6 also can effectively be alleviated impact force, thereby the noise that produces when making solenoid valve work reduces greatly.And have groove 15 on attractor 1 cylindrical, and on conduit 3, can play locating point or necking down during assembling, it is more firm that attractor 1 and conduit 3 are cooperated, and after solenoid valve used up to ten million times continuously, attractor 1 did not have loosening phenomenon yet.After valve work a period of time, valve port 14 can cave in and hard sealing head 9 can wear and tear, and this moment, counterbalance spring 6 can effectively compensate the gap that produces between hard sealing head 9 and the valve port 14 with hard sealing head 9 past pressing down.The valve of this new structure especially under high-frequency working environment, greatly reduces noise.

Embodiment two:

As shown in Figure 3, present embodiment and embodiment's one the main distinction is that valve port 14 is the soft material making, and press-fits within valve body 7; Cushion pad 13 is fixed under the attractor 1, mainly all has been the effect that reduces noise.

The foregoing description is to explanation of the present utility model, is not to qualification of the present utility model, any scheme after the utility model simple transformation is all belonged to protection domain of the present utility model.

Claims

1. solenoid valve, comprise conduit (3) and valve body (7), core iron (5) is equipped with in the inside of described conduit (3), top is pressed with attractor (1), inlet end (11) is arranged on the valve body (7), outlet side (12), be arranged on the valve port (14) between inlet end (11) and outlet side (12), it is characterized in that: the top of described core iron (5) has aperture, Returnning spring (4) is housed in the aperture, the other end of Returnning spring (4) is connected to attractor (1), the bottom of core iron (5) has mounting hole, hard sealing head (9) is housed in the mounting hole, and the top of described hard sealing head (9) is connected on the core iron (5) by counterbalance spring (6), and the bottom places valve port (14) top.

2. solenoid valve as claimed in claim 1 is characterized in that: also be provided with gland (8) around the side of described hard sealing head (9) and between the core iron (5).

3. solenoid valve as claimed in claim 1 is characterized in that: described hard sealing head (9) adopts steel ball.

4. solenoid valve as claimed in claim 1 is characterized in that: be provided with cushion pad (13) between the below of the top of described core iron (5) and attractor (1).

5. solenoid valve as claimed in claim 1 is characterized in that: have groove (15) on the described attractor (1), locating point externally beaten by conduit (3) or necking down cooperates with groove (15).

6. solenoid valve as claimed in claim 1 is characterized in that: the bottom of described attractor (1) also is provided with divided magnetic ring (2).

7. solenoid valve as claimed in claim 1 is characterized in that: described valve body (7) is provided with the buffering step, is provided with shock ring (10) in the buffering step.

8. as any one described solenoid valve in the claim 1 to 7, it is characterized in that: the internal diameter of described valve port (14) is less than the internal diameter of outlet side (12).