CN202733124U

CN202733124U - Pilot type electromagnetic switch air valve

Info

Publication number: CN202733124U
Application number: CN 201220371142
Authority: CN
Inventors: 金晓辉; 陈斌; 王利
Original assignee: SICHUAN HAICHUAN FIRE FIGHTING EQUIPMENT CO Ltd
Current assignee: SICHUAN HAICHUAN FIRE FIGHTING EQUIPMENT CO Ltd
Priority date: 2012-07-30
Filing date: 2012-07-30
Publication date: 2013-02-13
Anticipated expiration: 2022-07-30

Abstract

The utility model discloses a pilot type electromagnetic switch air valve which comprises a valve cover, a main valve body, a hollow main valve seat, a main valve core and a main valve sleeve. A pilot type valve body and an electromagnet are arranged on the valve cover, a movable iron core of the electromagnet is connected with a pilot type valve core, the pilot type valve core is arranged inside the pilot type valve body in sliding mode, a needle valve is fixedly connected with the lower end of the pilot type valve core, a pilot type valve sleeve is arranged on the pilot type valve body, the lower end of the needle valve penetrates through the pilot type valve sleeve, a compression spring is sleeved outside the needle valve, a main compression spring is arranged between the pilot type valve body and the main valve core, a pilot valve hole is arranged in the pilot type valve sleeve, a pilot valve groove is arranged on the outer side wall on the middle portion of the pilot type valve core, and pilot valve gas circuits are further arranged inside the pilot type valve body and the main valve sleeve. An exhaust hole is arranged inside the pilot type valve core, and an air hole is further arranged inside the pilot type valve body. A throttle valve core is arranged inside the main valve core below the needle valve, and a throttle hole matched with the needle valve is arranged inside the throttle valve core. The pilot type electromagnetic switch air valve can still be quickly closed to guarantee normal operation when being used for media easy to freeze.

Description

Guide type electromagnetic switch air valve

Technical field

The utility model relates to a kind of guide electromagnetic valve, especially for the guide type electromagnetic switch air valve in the low pressure carbon dioxide fire extinguishing systems.

Background technique

Be used at present the low pressure carbon dioxide fire extinguishing systems guide electromagnetic valve, be comprised of pilot valve and main valve, the two has passage to link to each other; When the magnet spool energising, moving iron core and static iron core adhesive are so that the pilot valve hole is open, the pressure in main valve plug back of the body chamber passes through the pilot valve orifice flow to outlet, this moment, main valve plug back of the body cavity pressure was lower than inlet pressure, main valve plug overcomes the resistance of Compress Spring so that main valve plug breaks away from main valve seat, carbon dioxide flows to outlet from import, and solenoid valve is opened; When coil blackout, moving iron core and static iron core break away from, and the pilot valve hole is closed, the back of the body cavity pressure of main valve plug is replenished by import by the throttle orifice of the throttling valve core in the main valve plug, with the inlet pressure balance, the main valve plug by compression effect of spring is closed main valve seat gradually, thus shut electromagnetic valve; The shortcoming of this solenoid valve is: because liquid carbon dioxide is continuing, constantly gasification in the flowing of large flow, expand, need absorbing heat from environment, the liquid carbon dioxide that causes the water vapor in the pipeline and be left freezes easily, when solenoid valve is opened, carbon dioxide also enters the spool epicoele by the throttle orifice of throttling valve core, therefore very easily stop up throttle orifice this moment, in case throttle orifice is blocked, during coil blackout, the back of the body cavity pressure of main valve plug can not be replenished by import by the throttling valve core in the main valve plug, still be lower than inlet pressure, cause solenoid valve normally to close, cause inefficacy.

The model utility content

The purpose of this utility model is for the prior art above shortcomings, and a kind of guide type electromagnetic switch air valve is provided, and it still can be closed rapidly when being used for the medium that easily freezes, and guarantees normal operation.

For achieving the above object, guide type electromagnetic switch air valve of the present utility model, comprise valve gap, main valve body, the main valve seat of hollow, main valve plug and main valve housing, main valve plug slides and is loaded in the main valve housing, main valve body is provided with gas-entered passageway and exhaust passage, gas-entered passageway is positioned at the below of main valve seat, the exhaust passage is positioned at the top of main valve seat, it is characterized in that being provided with guide valve blocks at valve gap, be provided with electromagnet at guide valve blocks, the moving iron core of electromagnet links to each other with guide's spool, what guide's spool slided is located in the guide valve blocks, and formerly the lower end of guide valve core is fixedly connected with needle-valve, is provided with guide's valve pocket at guide valve blocks, guide's valve pocket is passed in the lower end of needle-valve, and formerly the needle-valve overcoat between guide valve core and the guide's valve pocket has Compress Spring; Between guide valve blocks and main valve plug, be provided with main Compress Spring, formerly be provided with the pilot valve hole that is communicated with its inside and outside sidewall in the guide valve bushing, formerly the middle part outer side wall of guide valve core is provided with the pilot valve groove, also is provided with the pilot valve gas circuit that is communicated with pilot valve groove and exhaust passage in guide valve blocks and main valve housing; Formerly be provided with the exhaust port that is communicated with guide spool lower end surface and guide valve blocks inner chamber upper end in the guide valve core, also be provided with communication with cavity upper end and extraneous pore in the guide valve blocks; Be provided with throttling valve core in the main valve plug below needle-valve, be provided with the throttle orifice that cooperates with needle-valve in the throttling valve core; Between the guide's spool between main valve plug and the main valve housing, above the pilot valve groove and guide valve blocks, be equipped with seal ring.

Working principle of the present utility model is: the magnet spool energising, moving iron core is attracted downwards to drive the pilot valve core to be moved down, the inner chamber of pilot valve groove and guide's valve pocket is connected, the pressure of main valve plug epicoele is by the pilot valve hole, the pilot valve groove, the pilot valve gas circuit is to the exhaust passage release, this moment, the main valve plug upper cavity pressure was lower than gas-entered passageway pressure, main valve plug overcomes on the resistance of main Compress Spring and moves, main valve plug is opened gradually, when throttling valve core is moved on main valve plug, when needle-valve stops up the throttle orifice of throttling valve core, medium can't enter the epicoele of main valve plug, on the main valve plug, the pressure reduction of cavity of resorption strengthens, move until put in place on main valve plug is quick, opening speed is faster, and this moment, spool was opened fully, and medium flows to outlet from import; When coil blackout, guide's spool resets under the effect of Compress Spring, the inner chamber isolation of pilot valve groove and guide's valve pocket, needle-valve separates with throttling valve core, throttle orifice is unimpeded, and the upper cavity pressure of main valve plug is replenished by gas-entered passageway by the throttle orifice of the throttling valve core in the main valve plug, the pressure balance in the upper and lower chamber of main valve plug, main valve seat is closed in the effect of main valve plug acceptor Compress Spring, thus shut electromagnetic valve; When solenoid valve is opened, because needle-valve stops up the upper end throttle orifice of throttling valve core, in the throttle orifice substantially without media flow, even for the medium that easily freezes, throttle orifice can be not blocked yet, when shut electromagnetic valve, but the pressure Fast-Balance in the upper and lower chamber of main valve plug, main valve plug can be closed rapidly main valve seat, guarantees normal operation; And the stroke of guide's spool is very short, but reduced volume.

As further improvement of the utility model, be provided with seal groove in the lower end surface of main valve plug, be provided with the O RunddichtringO in the seal groove, the screw in the lower end of main valve plug by hollow also is equipped with pressing plate; In the lower end surface of main valve plug seal ring is set by pressing plate, can improves sealing;

In sum, the utility model still can be closed rapidly when being used for the medium that easily freezes, and guarantees normal operation, and has that opening speed is fast, volume is little, the advantage of good airproof performance.

Description of drawings

Fig. 1 is the utility model embodiment's structural representation.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1, this guide type electromagnetic switch air valve, comprise valve gap 1, main valve body 2, the main valve seat 3 of hollow, main valve plug 4 and main valve housing 5, main valve plug 4 slides and is loaded in the main valve housing 5, main valve body 2 is provided with gas-entered passageway 6 and exhaust passage 7, gas-entered passageway 6 is positioned at the below of main valve seat 3, exhaust passage 7 is positioned at the top of main valve seat 3, be provided with guide valve blocks 8 at valve gap 1, be provided with electromagnet 9 at guide valve blocks 8, the moving iron core 10 of electromagnet 9 links to each other with guide's spool 11, what guide's spool 11 slided is located in the guide valve blocks 8, and formerly the lower end of guide valve core 11 is fixedly connected with needle-valve 12, is provided with guide's valve pocket 13 at guide valve blocks 8, guide's valve pocket 13 is passed in the lower end of needle-valve 12, and formerly needle-valve 12 overcoats between guide valve core 11 and the guide's valve pocket 13 have Compress Spring 14; Between guide valve blocks 8 and main valve plug 4, be provided with main Compress Spring 15, formerly be provided with the pilot valve hole 16 that is communicated with its inside and outside sidewall in the guide valve bushing 13, formerly the middle part outer side wall of guide valve core 11 is provided with pilot valve groove 17, also is provided with the pilot valve gas circuit 18 that is communicated with pilot valve groove 17 and exhaust passage 7 in guide valve blocks 8 and main valve housing 5; Formerly be provided with the exhaust port 19 that is communicated with guide spool lower end surface and guide valve blocks inner chamber upper end in the guide valve core 11, also be provided with communication with cavity upper end and extraneous pore 20 in the guide valve blocks 8; Be provided with throttling valve core 21 in the main valve plug 4 below needle-valve 12, be provided with the throttle orifice 22 that cooperates with needle-valve 12 in the throttling valve core 21; Between the guide's spool 11 between main valve plug 4 and the main valve housing 5, above the pilot valve groove and guide valve blocks 8, be equipped with seal ring 23; Lower end surface at main valve plug 4 is provided with seal groove, is provided with O RunddichtringO 24 in the seal groove, and the screw 25 in the lower end of main valve plug 4 by hollow also is equipped with pressing plate 26.

Working principle of the present utility model is: the coil electricity of electromagnet 9, moving iron core 10 is attracted downwards to drive pilot valve core 11 to be moved down, exhaust port 19 and pore 20 can be discharged the air pressure in guide's valve pocket 13, guarantee moving down smoothly of guide's spool 11, then pilot valve groove 17 is connected with the inner chamber of guide's valve pocket 13, the pressure of main valve plug 4 epicoeles is by pilot valve hole 16, pilot valve groove 17, pilot valve gas circuit 18 is 7 releases to the exhaust passage, this moment, the main valve plug upper cavity pressure was lower than the pressure in the gas-entered passageway 6, main valve plug 4 overcomes on the resistance of main Compress Spring 15 and moves, main valve plug is opened gradually, when throttling valve core 21 is moved on main valve plug 4, when needle-valve 12 stops up the throttle orifice 22 of throttling valve core 21, medium can't enter the epicoele of main valve plug 4, on the main valve plug, the pressure reduction of cavity of resorption strengthens, main valve plug 4 moves until put in place on fast, opening speed is faster, and this moment, main valve plug 4 was opened fully, and medium flows to outlet from import; When coil blackout, guide's spool 11 resets under the effect of Compress Spring 14, pilot valve groove 17 is isolated with the inner chamber of guide's valve pocket 13, needle-valve 12 separates with throttling valve core 21, throttle orifice 22 is unimpeded, and the upper cavity pressure of main valve plug 4 is replenished by gas-entered passageway 6 by the throttle orifice 22 of throttling valve core 21, the pressure balance in the upper and lower chamber of main valve plug, main valve seat 3 is closed in the effect of main valve plug 4 acceptor's Compress Springs 15, thus shut electromagnetic valve; When solenoid valve is opened, because needle-valve 12 stops up the throttle orifice 22 of throttling valve core 21, throttle orifice 22 is interior substantially without media flow, even for the medium liquid carbon dioxide that easily freezes, throttle orifice 22 can be not blocked yet, when shut electromagnetic valve, but the pressure Fast-Balance in the upper and lower chamber of main valve plug, main valve plug 4 can be closed rapidly main valve seat 3, guarantees normal operation; And the stroke of guide's spool 11 is very short, can dwindle the volume of solenoid valve; In the lower end surface of main valve plug 4 O RunddichtringO 24 is set by pressing plate 26, can improves sealing.

Claims

1. guide type electromagnetic switch air valve, comprise valve gap, main valve body, the main valve seat of hollow, main valve plug and main valve housing, main valve body is provided with gas-entered passageway and exhaust passage, gas-entered passageway is positioned at the below of main valve seat, the exhaust passage is positioned at the top of main valve seat, it is characterized in that being provided with guide valve blocks at valve gap, be provided with electromagnet at guide valve blocks, the moving iron core of electromagnet links to each other with guide's spool, what guide's spool slided is located in the guide valve blocks, and formerly the lower end of guide valve core is fixedly connected with needle-valve, is provided with guide's valve pocket at guide valve blocks, guide's valve pocket is passed in the lower end of needle-valve, and formerly the needle-valve overcoat between guide valve core and the guide's valve pocket has Compress Spring; Between guide valve blocks and main valve plug, be provided with main Compress Spring, formerly be provided with the pilot valve hole that is communicated with its inside and outside sidewall in the guide valve bushing, formerly the middle part outer side wall of guide valve core is provided with the pilot valve groove, also is provided with the pilot valve gas circuit that is communicated with pilot valve groove and exhaust passage in guide valve blocks and main valve housing; Formerly be provided with the exhaust port that is communicated with guide spool lower end surface and guide valve blocks inner chamber upper end in the guide valve core, also be provided with communication with cavity upper end and extraneous pore in the guide valve blocks; Be provided with throttling valve core in the main valve plug below needle-valve, be provided with the throttle orifice that cooperates with needle-valve in the throttling valve core; Between the guide's spool between main valve plug and the main valve housing, above the pilot valve groove and guide valve blocks, be equipped with seal ring.

2. guide type electromagnetic switch air valve as claimed in claim 1 is characterized in that being provided with seal groove in the lower end surface of main valve plug, is provided with the O RunddichtringO in the seal groove, and the screw in the lower end of main valve plug by hollow also is equipped with pressing plate.