Electromagnetism trigger and gas cut off valve
Technical field
The utility model relates to a kind of fuel gas shutoff valve member, especially a kind of electromagnetism trigger, and has the gas cut off valve of this electromagnetism trigger.
Background technique
In gas pressure regulating system, cut-off valve is safety features, and during normal use, cut-off valve is only when system pressure exceedes cut-off valve setting value, and cut-off valve just can do cut-out action to block source of the gas, protection upstream device.But this process is according to cut-off valve self monitoring system pressure condition, the Purely mechanical action made on the spot.
Existing gas cut off valve is as sense cell completely by epithelium spring structure or piston spring structure; needs protective medium air pressure is monitored; when medium air pressure exceedes cut-off valve spring setting value; sense cell will trigger pin buckle machinery by effects of air pressure, thus cause cut-off valve to cut off action.
Along with the automatic control of gas pressure regulating system requires more and more higher, cut-off valve is too increased to the requirement of telecontrol.Such as when control system receives other early warning signal, also need the mode by sending instruction to cut-off valve to carry out action, this just needs to increase a set of Remote triggering structure to existing gas cut off valve and realizes.
Early stage gas cut off valve does not consider the function of long-range cut-out, and therefore most cut-off valve cannot install long-range cut-out.Minority has the cut-off valve of long-range cutting function, and be the medium air pressure being imported gas burning system by solenoid valve to cut-off valve pressure element, to make cut-off valve do cut-out action, but this mode depends on the gas medium of gas burning system, and therefore safety reliability is low.
Therefore, need research and development one neither to need by gas burning system medium, the more reliable long-range cut-out product that independently can use with gas burning system again, preferably also will possess the function of on-site manual operation simultaneously.
Model utility content
Technical problem to be solved in the utility model is to provide one can remote-operated electromagnetism trigger.
The utility model solves the technological scheme that its technical problem adopts: electromagnetism trigger, comprise electromagnetism loop bar, coil, piston, push rod, cover joint element for bar, energising joint, described electromagnetism loop bar outer felt coiling, coil is connected with energising joint, electromagnetism loop bar is hollow structure, piston is arranged in electromagnetism loop bar, and can move in electromagnetism loop bar, piston is that magnetic absorption material is made, first spring is set between piston and electromagnetism loop bar, electromagnetism loop bar is away from one end connecting sleeve joint element for bar of piston, push rod is arranged in electromagnetism loop bar and cover joint element for bar, and push rod one end is connected with piston, the other end of push rod through electromagnetism loop bar and exposure outside cover joint element for bar.
By energising joint to coil power supply, coil forms magnetic field, and piston is adsorbed by magnetic field and compresses the first spring movement, drives push rod to eject.After power-off, magnetic field dissipate, piston resets under the effect of the first spring, drives the push rod ejected to reset.Under the situation that is not energized, piston and push rod are subject to the effect of the first spring, keep the state that push rod does not eject.
Further, described electromagnetism loop bar arranges the first seal ring near between piston one end and coil, and electromagnetism loop bar arranges the second seal ring away between piston one end and cover joint element for bar.
Further, one end of the close piston of described electromagnetism loop bar connects plug, arrange Manual press bar, and Manual press bar can move in plug in plug, and piston is pointed in Manual press bar one end, and the other end exposure is outside plug.
The exposure end of pressing Manual press bar, Manual press bar promotes piston and moves, and promotes push rod further, realizes on-site manual manipulation electromagnetism trigger.Like this, except can long-range power-on servicing electromagnetism trigger, can also on-site manual manipulation electromagnetism trigger.
Further, the diameter of one end of the sensing piston of described Manual press bar is less than exposure in the diameter of outer one end.
Further, outside sheathed second spring of described Manual press bar.
Pressing Manual press bar after unclamping, under the effect of the second spring, Manual press bar automatically resets.
Any one electromagnetism trigger above-mentioned is installed on existing gas cut off valve, push rod is connected with the trigger point of gas cut off valve, just can obtain a kind of can the gas cut off valve of telecontrol.
Particularly, be fixed on the shell of existing gas cut off valve by cover joint element for bar, push rod is connected to the trigger point of gas cut off valve by bent plate, and what make push rod by leverage ejects the trigger point that can act on gas cut off valve.
The beneficial effects of the utility model are:
Electromagnetism trigger can receive extraneous electrical signal, realizes remote operation, and the trigger action of electromagnetism trigger is Purely mechanical, safe and reliable; Electromagnetism trigger is arranged Manual press bar, on-site manual manipulation electromagnetism trigger can be realized.
The utility model electromagnetism trigger is installed on existing gas cut off valve, obtain gas cut off valve of the present utility model, the first, remote controlled gas cut off valve, does not need to use any air pressure in the voltage-regulating system of gas cut off valve place, improves the safety and reliability of gas cut off valve; The second, electromagnetism trigger adopts general linkage structure to design, and can be applicable to various different gas cut off valve; Three, gas cut off valve incorporates telecontrol and on-site manual controlling functions, and mutual noninterference, while meeting different demand, in turn ensure that high reliability.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of the utility model electromagnetism trigger;
Fig. 2 is the structural drawing before the energising of the utility model electromagnetism trigger;
Fig. 3 is the structural drawing after the energising of the utility model electromagnetism trigger;
Fig. 4 is the structural drawing of the utility model gas cut off valve.
Component, position and numbering in figure: electromagnetism loop bar 1, first spring 2, piston 3, coil 4, first seal ring 5, second seal ring 6, cover joint element for bar 7, the 3rd seal ring 8, the 4th seal ring 9, plug 10, Manual press bar 11, push rod 12, second spring 13, energising joint 14, bent plate 15.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figures 1 to 3, the new electromagnetism trigger of this practicality comprises electromagnetism loop bar 1, coil 4, piston 3, push rod 12, cover joint element for bar 7, energising joint 14, electromagnetism loop bar 1 outer felt coiling 4, coil 4 is connected with energising joint 14, electromagnetism loop bar 1 is hollow structure, arranges piston 3 in the hollow structure of electromagnetism loop bar 1 right-hand member, and piston 3 can move in electromagnetism loop bar 1, the magnetic field produced after being energized to make coil 4 can act on piston 3, and piston 3 is made for magnetic absorption material.Arrange the first spring 2 between piston 3 and electromagnetism loop bar 1, electromagnetism loop bar 1 is away from one end connecting sleeve joint element for bar 7 of piston 3; Push rod 12 is arranged in electromagnetism loop bar 1 and cover joint element for bar 7, and push rod 12 right-hand member is connected with piston 3, the left end of push rod 12 through electromagnetism loop bar 1 and exposure in overlapping outside joint element for bar 7.
As Fig. 2, powered to coil 4 by energising joint 14, coil 4 forms magnetic field, and piston 3 is adsorbed by magnetic field and compresses the first spring 2 and moves, and drives push rod 12 to eject.As Fig. 3, after power-off, magnetic field dissipate, piston 3 resets under the effect of the first spring 2, drives the push rod 12 ejected to reset.Under the situation that is not energized, push rod 12 ejects the length of A1; After energising, piston 3 is moved to the left away from one end of the first spring 2 and contacts with electromagnetism loop bar 1, and now push rod 12 ejects the length of A2, and A2 is greater than A1.
In order to avoid the foreign material such as dust enter, electromagnetism loop bar 1 is near arranging the first seal ring 5 between piston 3 one end and coil 4, and electromagnetism loop bar 1 arranges the second seal ring 6 away between piston 3 one end and cover joint element for bar 7; Cover joint element for bar 7 arranges the 3rd seal ring 8.
In addition, in order to avoid piston 3 landing from electromagnetism loop bar 1, simultaneously also in order to realize manually-operable electromagnetism trigger on the spot, one end that electromagnetism loop bar 1 arranges piston 3 connects plug 10, arranges the 4th seal ring 9 between electromagnetism loop bar 1 and plug 10; Plug 10 can select stainless steel six square rod, arranges Manual press bar 11 in plug 10, and Manual press bar 11 can move in plug 10, and piston 3 is pointed in Manual press bar 11 one end, and the other end exposure forms button outside plug 10, for manually-operable.
The diameter that Manual press bar 11 points to one end of piston 3 is less than exposure in the diameter of outer one end, outside sheathed second spring 13 of Manual press bar 11.The exposure end of pressing Manual press bar 11, Manual press bar 11 promotes piston 3 and is moved to the left, and promotes push rod 12 further, realizes on-site manual manipulation electromagnetism trigger.Unclamp Manual press bar 11, under the effect of the second spring 13, Manual press bar 11 automatically resets.Like this, except can long-range power-on servicing electromagnetism trigger, can also on-site manual manipulation electromagnetism trigger.
In order to avoid Manual press bar 11 comes off in plug 10, between the second spring 13 and Manual press bar 11 termination pointing to piston 3, Manual press bar 11 is arranged a circle draw-in groove, one circle suitable snap ring is correspondingly set outside draw-in groove, the width of draw-in groove is greater than the width of snap ring, avoid Manual press bar 11 to come off, do not affect again Manual press bar 11 simultaneously and promote piston 3 and move.In addition, in order to avoid dust enters in plug 10, Manual press bar 11 arranges seal groove, and seal ring is set in seal groove, to strengthen seal.
Above-mentioned electromagnetism trigger is installed on existing gas cut off valve, push rod 12 is connected with the trigger point of gas cut off valve, just can obtain a kind of can the gas cut off valve of telecontrol.As shown in Figure 4, cover joint element for bar 7 is fixed on the shell of existing a certain gas cut off valve, push rod 12 is connected to the trigger point of gas cut off valve by bent plate 15, fixing in the middle part of bent plate 15, and bent plate 15 can rotate around middle part immovable point, what make push rod 12 by leverage ejects the trigger point that can act on gas cut off valve.
Trigger action due to electromagnetism trigger is Purely mechanical, is a kind of general linkage structure, therefore can be applicable to various different gas cut off valve, and has telecontrol and on-site manual controlling functions, can meet the different needs, and reliability is high.