CN2070854U

CN2070854U - Hand antecedent type electromagnetic valve

Info

Publication number: CN2070854U
Application number: CN 90213142
Authority: CN
Inventors: 许渭清
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-12
Filing date: 1990-07-12
Publication date: 1991-02-06

Abstract

The utility model relates to a hand antecedent type electromagnetic valve which adopts a hand eccentric shaft valve opening mechanism. A guide valve core is jacked up by the rotation of an eccentric shaft to obtain the labor saving purpose of using hands to open the valve, and three straight opening slip rings and two straight opening slip rings which are mutually stagger are arranged on a main valve core and a guide post respectively to make the main valve core have the performances of good inside and outside guiding, centering, damping, residue isolation and clamping prevention. A main valve core head and a guide valve core head can be manufactured by adopting stainless steel or brass or fluoroplastic to ensure the characters of corrosion resistance, wear resistance and good seal. The utility model has the advantages of simple structure, reliable work, good sealing property and long service life and is suitable for the pipelines of steam and corrosive fluid.

Description

Band manual operating device guide electromagnetic valve

The utility model belongs to a kind of guide electromagnetic valve with the additional manual device.

At present, applied high-pressure solenoid valve mostly is guide electromagnetic valve on the market, and its purpose is to reduce the opening force of solenoid valve.Yet it is all not high that existing various guide electromagnetic valves are applied in the steam line reliability, and the life-span is short, and how not to be with manual operating device, so when the power failure or the state of emergency, can't manually opened valve.Give in the actual job applications and bring many troubles.Though occurred guide electromagnetic valve (as Chinese patent CN87204720) recently, the inoperable difficulty of solenoid valve when having solved power failure with manual operating device.Can still there be the manual operating device complexity by existing band manual operating device solenoid valve.The processing and fabricating difficulty.Particularly the aciculiform valve rod moves axially the easily problem such as leakage of packing that makes.

The purpose of this utility model be to provide that a kind of manually-operable is more laborsaving, structure is easier, more reliable, the better high pressure guide electromagnetic valve of anti-sticking performance of work.

According to the solution that purpose of the present invention proposed be: at the pilot valve position of solenoid valve setting-manual eccentric valve-opening mechanism.Avoided moving axially of manually operated valve.Thereby solved conventional solenoid valve manual operating device operation effort.The problem that packing leaks easily.And the slip ring of all having set up guiding and having used at the spool position of main valve and pilot valve every slag.And row's silt device.Having solved solenoid valve is subject to sticking card and causes the malfunctioning key issue of action.

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

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the utility model guide valve core structural drawing;

Fig. 3 is the utility model slip ring structural drawing.

Fig. 1 has provided an embodiment of the present utility model.The utility model mainly is made up of main valve body (1), living spool (36), directional post (30), main valve plug return spring (35), pilot valve body (12), rotating shaft (9), guide valve core (16), guide valve core return spring (21), shelves iron (17), electromagnetic coil and overcoat (18) (19).On main valve plug (36), have wide shape slip ring groove (7), slip ring (4), (5), (6) that three roads head straight for mouth and mutual dislocation are housed in the wide shape slip ring groove (7).Better for the sealing that makes slip ring every slag and steering capability, do not increase surface friction drag again, and can make slip ring when expanding with heat and contract with cold, be in best fit-state all the time, and with the opening mutual dislocation of slip ring (4), (5), (6).And make between this three roads slip ring and the slip ring groove (7) gap that keeps leaving 0.1～0.5mm.On main valve directional post (30), also have in addition also to be equipped with in the above slip ring grooves of twice (31), (33) slip ring groove (31), (33) and head straight for a mouthful slip ring (32), (34), and match with the pilot hole (37) of main valve plug (36), and keep 0.1～0.5 mm clearance.And mouthful (39) opening size of heading straight for of slip ring is 0.1～1mm.In addition, on guide valve core (16), also have slip ring groove (25).And slip ring (26) is housed, match with magnetic shield (23).And on pilot valve body (12), be provided with the knob (8) that manual rotating shaft (9) and can be indicated valve open and close state.One eccentric shaft (10) is arranged in the rotating shaft (9).But jack-up, let-down guide valve core (16), thereby realized the easy valve actuation energy of manually opening.When the solenoid valve proper functioning, eccentric shaft (10) is in lower dead point position (be on Fig. 1 shown in position).When power failure guide valve core (16) can not be worked.Then can make eccentric shaft (10) by knob (8) rotating shaft (9), jack-up guide valve core (16) and open valve, and by the resistance location self-locking of Sealing and eccentric friction pair.When the needs throttle down, rotating shaft (9).Make eccentric shaft (10) return, guide valve core (16) then utilizes the weight of self and the elastic force and the hydrodynamic pressure of return spring (21).Automatic-closing valve.

For more complete, avoid the wearing and tearing and sticking card of sludge in the fluid effectively to spool.In the utility model, guide valve core (16) is on the cylndrical surface on slip ring groove (25) top.Have the twice through-flow grooves of wide shape circular arc (14), (15).Make antiseized card performance better.Locating near slip ring groove (25).Have the warp-wise pod apertures (24) of leading to spring eye (22).Top in pilot valve core print (11) has pressure row silt (slag) inclined hole (27) that leads to spring eye (22), the row's of formation silt passage.When guide valve core (16) when being in closed condition, if any shoal materials, then can be deposited on slip ring (26) top of guide valve core (16) in the magnetic shield (23).And be diffused in the spring eye (22) through pod apertures (24) radially.As the interior also residual sludge that has of magnetic shield (23).When driving valve.Guide valve core (16) moves upward, fluid in the magnetic shield (23) is squeezed, under the effect of fluid, be pushed in the spring eye (22) from pod apertures (24), and realize automatic function of arranging sludge with fluid through pressure row's sludge inclined hole (27) ejection together with the sludge in this hole.

Slip ring of the present utility model all can adopt metal or polytetrafluoroethylmaterial material manufacturing.Polytetrafluoroethylmaterial material manufacturing effect with the band addition material is better.The opening of slip ring is for heading straight for mouth.Opening size is 0.1～1mm.And main valve core print (3) and pilot valve core print (11) all adopt the stainless steel material manufacturing, or according to service condition, also can adopt materials such as brass, teflon, to satisfy the requirement of the wear-resisting or different operating modes of corrosion protection.In addition, band pole (38), the return spring (35) of (20), (21) all are housed in the spring eye (29) of directional post (30) and guide valve core (16), (22), reduce and avoided spring stretch, buckling phenomenon in the compression process, make main valve plug and guide valve core (16) axial motion that is in line.Guaranteed that main valve core print (3) remains no gap with valve core case (2), pilot valve core print (11) with pilot valve core print seat (28) and coincide when closing valve.Realized really that in use reliable operation, maintenance are little, good seal performance, the purpose of long service life.

Claims

1. band manual operating device guide electromagnetic valve, comprise valve body (1), main valve plug (36), directional post (30), main valve plug return spring (35), pilot valve body (12), guide valve core (16), guide valve core return spring (21), magnetic shield (23), shelves iron (17), electromagnetic coil (18), electromagnetic coil overcoat (19), it is characterized in that having on the main valve plug (36) wide shape slip ring groove (7).Three roads are housed in the wide shape slip ring groove (7) head straight for a mouthful slip ring (4), (5), (6).Also have simultaneously to be equipped with respectively in slip ring groove (31) more than the twice, (33) on directional post (30) and head straight for a mouthful slip ring (32), (34), this external pilot valve body (12) is provided with a manual eccentric valve-opening mechanism.

2. solenoid valve according to claim 1.It is characterized in that manual eccentric valve-opening mechanism be by rotating shaft (9) but and the eccentric shaft (10) of a jack-up or let-down guide valve core constituted.And in rotating shaft (9) but the valve outer end operation knob (8) of one indicating valve door opening and closing state is housed.

3. according to claim 1,2 described solenoid valves.The opening (39) that it is characterized in that three road slip rings (4), (5), (6) on the main valve plug is for heading straight for mouth, and opening mutual dislocation when installing, and leaves the assemblage gap of 0.1～0.5mm simultaneously diametrically with slip ring groove (7).And the opening size that heads straight for mouthful (39) is 0.1～1mm.

4. according to claim 1,2 described solenoid valves.It is characterized by and on the cylndrical surface on guide valve core (16) top, have the twice through-flow grooves of wide shape circular arc (14), (15).

5. solenoid valve according to claim 1 is characterized in that the pilot hole (37) on the main valve plug (36) matches with the directional post (30) that slip ring (32), (34) are housed.And, the gap that all keeps 0.1～1mm between pilot hole (37) and slip ring (32), (34) and the directional post (30).