CN208417658U - Gas closes device in limited time - Google Patents

Abstract

A kind of gas closes device in limited time, comprising shell and timer, timer includes being located at the intracorporal machine core of shell, and connect and be maintained above shell with the shaft of machine core, it prescribes a time limit the shut-in time for forward turn setting gas, or reverse turn does not set the knob of gas shut-in time.Wherein, machine core includes limited post, and shaft is equipped with bar, and shell periphery has outwardly projecting limit plate, and knob inner circumferential is equipped with inwardly projecting baffle.Knob forward/reverse maximum rotating angle is when terminating in baffle and touching limit plate and limited post respectively simultaneously with bar, forms double limitation insurance whereby, when preventing knob by firmly turn to maximum angle, damage bar or limited post.In addition, the bottom of shaft is supported using steel ball, shaft is avoided to decline and machine core is made to lose function.

Description

Gas closes device in limited time

Technical field

The utility model closes device about a kind of gas in limited time, refers in particular to a kind of gas limit for having double limitation insurance When close device.

Background technique

Fig. 1 shows a kind of appearance of mechanical type timepiece 14, which includes machine core 45 and knob 48, wherein machine core 45 have shaft 52 and bracket 54, and shaft 52 is equipped with bar 56, and bracket 54 is equipped with limited post 58, and knob 48 is connected to shaft 52, It prescribes a time limit the shut-in time for user's turn setting.Bar 56 and limited post 58 constitute the limiting device of timer 14, can limit The maximum rotating angle of knob 48；That is, the maximum rotating angle of knob 48 terminates in bar 56 when touching limited post 58.

This mechanical type timepiece 14 known to one have the advantages that it is light and handy, practical with it is cheap, therefore be widely used in one As the small household appliances product such as domestic oven, dish drier, electric fan, to set the shut-in time in limited time, i.e., within certain time Set the time that uses of household appliances, setting time then automatic shutdown.In addition, the mechanical type timepiece 14 is also applied to watt On this utensil or pipeline, it is used to closed gas in limited time.Such as the TaiWan, China new patent proposed on behalf of the applicant No. M462346 " gas timing breaker ", No. M473470 " gas safe and timing breaker ", No. M506939 " has and determines When closed gas function gas oven ", No. M556313 " gas oven timing means " etc. be all case using mechanical type timepiece Example.

Mechanical type timepiece 14 is because of light and handy relationship, only using bar 56 made of ferrous material and 58 diameter of limited post Respectively 2 ㎜ and 2.5 ㎜, therefore limited strength, but the knob 48 configured by timer 14 that above-mentioned electric equipment products use compared with Small, the torsion that turn knobs 48 generate is relatively small, applies in electric equipment products and no problem.However, working as the mechanical timing When device 14 is applied to gas or pipeline aspect, due to for safety, laborsaving, operation ease or other reasons, timing The opposite big many of timer knob 48 used than above-mentioned electric equipment products of the outer diameter of device knob 48, therefore turn knobs 48 generate Torsion it is relatively large, once because hastily, nervous or other reasons and when firmly turning knob 48, bar 56 and limited post 58 It is easily bent deformation, even fracture, and lose the function of limit.

On the other hand, as seen in figures 2 and 3, the bottom of timer shaft 52 is because form hanging shape without any support State can move down when shaft 52 is by external force (such as colliding), lead to the turntable 55 and pivot that are incorporated in 52 end of shaft The brake component 46 for being connected to bracket 54 cannot be maintained at correctly cooperation position, it is, the trip 62 of brake component 46 can not be embedded in The notch 57 of turntable 55 or circular contact with turntable 55, and machine core 45 is made to lose function.

Utility model content

The purpose of this utility model is in order to solve the above problem and provides a kind of gas and close device in limited time have auxiliary limit Position device, the limiting device that timer can be cooperated existing generate double limitation safety effect, it is ensured that knob is arrived by firmly turn When maximum angle, bar and limited post will not be damaged.

Another object of the present invention is to provide a kind of gas and closes device in limited time, has rotating-shaft support devices, can be with It is moved down when preventing shaft by external force, shaft is avoided to decline and machine core is made to lose function.

To achieve the above object, the utility model takes following technical scheme:

The gas of the utility model closes device in limited time, includes a shell, which has one first housing chamber and one second Housing chamber, the side of the shell connect an inlet suction port, and the other side connects an air outlet adapter, the inlet suction port along axial direction open up one into Stomata road, the air outlet adapter open up an outlet duct along axial direction, and the air inlet port, the second housing chamber and outlet duct constitute a gas Access.The gas timing means also include one be located at the timer of first housing chamber, one be set to second housing chamber time-delay valve, and One crosses over the transmission mechanism of first and second housing chamber.The timer includes a machine core and a knob, which includes a bracket With a shaft, the upper surface of the bracket is equipped with a limited post, which is radially equipped with a bar, the knob be connected to the shaft and The top of the shell is maintained at for artificial turn.When forward turn knob sets shut-in time in limited time of the time-delay valve or inverse To the turn knob to be directed toward the time-delay valve be open position when, which drives the time-delay valve actuation by the transmission mechanism At valve opening position, keep the outlet duct unimpeded.It ends (setting time is then) when the timer or the turn knob is to being directed toward The time-delay valve be closed position when, the time-delay valve involution valve closing position and occlude the outlet duct.Wherein, the periphery of the shell has One outwardly projecting limit plate, the inner circumferential of the knob are equipped with an inwardly projecting baffle, the knob forward/reverse maximum swirl angle When degree terminates in the baffle and touches the limit plate and limited post respectively simultaneously with bar.

In another embodiment, first and second described housing chamber is isolated by a partition, one steel ball of flexible assembling on the partition, The bottom of the shaft is supported on the steel ball.

In another embodiment, a safety valve can be set in the air inlet port, and the safety valve is different in gas flow Automatically close up the air inlet port when often.

In another embodiment, the dynamic valve of a heat can be set in the air inlet port, which moves valve and be higher than limit in temperature Determine the air inlet port that automatically closes up when temperature.

The beneficial effects of the utility model are: the utility model compared to the prior art the effect of be, pass through a bodily form At in shell periphery limit plate be integrally formed in the baffle of knob inner circumferential, constitute auxiliary stopper device, cooperation timer was both By limited post and the basic limiting device that form of bar, make knob forward/reverse maximum rotating angle terminates in baffle and bar When touching limit plate and limited post respectively simultaneously, double limitation safety effect is generated whereby, avoids being arrived in knob by firmly turn Bar and limited post are damaged when maximum angle.

In addition, the steel ball for being held in partition rolling by one generates supporting role in the bottom of shaft, prevent shaft downward It is mobile, machine core, which is avoided, because shaft declines loses function.

Detailed technology content and other purposes and feature as the utility model is referring to the following embodiment for cooperating attached drawing Illustrate to be fully appreciated that.

Detailed description of the invention

Fig. 1 is the outside drawing of existing machinery formula timer.

Fig. 2 is the front view of existing machinery formula timer, and display shaft decline makes position quilt of the turntable relative to brake component The situation of change.

Fig. 3 is the left side view of Fig. 2.

Fig. 4 is the outside drawing that the utility model gas closes device in limited time.

Fig. 5 is the element exploded view of the utility model.

Fig. 6 is axial direction (Gas Flow direction) sectional view of the utility model, and display delayed valve, safety valve and the dynamic valve of heat are protected The state in valve closing position is held, wherein arrow indicates Gas Flow path, the same below.

Fig. 7 is the sectional view of the line A-A along Fig. 6, the state that the notch of the trip and turntable that show brake component agrees with.

Fig. 8 be the utility model axial section, the actuation of display delayed valve at valve opening position state.

Fig. 9 is the sectional view of the line B-B along Fig. 8, display knob forward turn to maximum angle when, bar and baffle are simultaneously The state of limited post and limit plate is touched respectively.

When Figure 10 is the reverse turn of knob to maximum angle, bar touches limited post and limit plate with baffle respectively simultaneously Sectional view.

Figure 11 is the sectional view of the line C-C along Fig. 8, and display actuator arm pushes actuation at the safe valve plug of valve closing position backward Situation.

Drawing reference numeral: 10: gas closes device in limited time；11: shell；12: inlet suction port；13: air outlet adapter；14: timing Device；15: transmission mechanism；16: time-delay valve；17: safety valve；18: the dynamic valve of heat；19: steel ball；20: the dynamic valve seat of heat；21: flange；22: Partition；23: the first housing chambers；24: the second housing chambers；25: cap；26: screw；27: sealing ring；28: air inlet side interface；29: outlet Side interface；30: segment difference section；31: negative thread；32: jack；33: limit plate；34: air inlet port；35: cylindrical portion；36: threaded portion； 37:O shape ring；38: fastener；39: annular ditch groove；40: outlet duct；41: outer screw section；42:O shape ring；43: safe valve chamber；44: The dynamic valve chamber of heat；45: machine core；46: brake component；47: instruction disk；48: knob；49: screw；50: column component；51: clockwork spring；52: turning Axis；53: gear train；54: bracket；55: turntable；56: bar；57: notch；58: limited post；59: elastic slice；60: segment difference section；61: Pillar；62: trip；63: arrow；64: baffle；65: bar axis；66: rocker arm；67: rocking bar；68: opening；69: actuator arm；70: bullet Spring abutment；71: valve rod；72: valve body；73: compressed spring；74: centre bore；75: head；76: bar tail；77: washer；78: safety valve Seat；79: bracket；80: safe valve plug；81: compressed spring；82: pin thread；83:O shape ring；84: logical circulation road；85: segment difference section；86: Sleeve；87: rack body；88: slide bar；89: bar tail；90: bracket；91: the dynamic valve plug of heat；92: compressed spring；93: eutectic spot welding Material；94: bracket body；95: fin；96: sets of holes；97: short tube；98: chamber；99: strainer；100: screw.

Specific embodiment

As shown in Figs. 4-6, it includes a shell 11, an air inlet connecting that the gas that the utility model discloses closes device 10 in limited time First 12, one air outlet adapter 13, a timer 14, a transmission mechanism 15 and a time-delay valve 16.Wherein:

Shell 11, shape is substantially cylindric, and bottom extends radially outward to form a fillet quadrangle flange 21, interior Portion space is divided into one first housing chamber 23 and one second housing chamber 24, the timer 14 and a part by radial about 22 partition 15 component of transmission mechanism is installed on the first housing chamber 23, and time-delay valve 16 and 15 component of transmission mechanism of another part are set to second shell The bottom opening of room 24, second housing chamber 24 is closed by one using the cap 25 that several screws 26 are locked on flange 21, and is matched Unification is assembled in the sealing ring 27 of 11 bottom of shell, and formation is reliable airtight between cap 25 and the contact surface of shell 11, whereby The second housing chamber 24 is closed, gas leakage is prevented.Shell 11 also includes that the air inlet side interface 28 and one being oppositely arranged goes out gas side Interface 29, two interface 28,29 are connected to the second housing chamber 24 respectively, and the inlet suction port 12 is connected to air outlet adapter 13 Air inlet side interface 28 and outlet side interface 29.Air inlet side interface 28 is preceding small, the rear big different diameter hole of an internal diameter, and between A cyclic annular segment difference section 30 is formed, the depth foundation of air inlet side interface 28 is packed into as inlet suction port 12.Air inlet side interface 28 also wraps The jack 32 that the negative thread 31 and one for being set to aperture section containing one intersect vertically with big hole section, the work of the negative thread 31 and jack 32 It is aftermentioned with remaining, it skips over for the time being.Outlet side interface 29 is a hole (screw hole) for being equipped with negative thread.

Inlet suction port 12 has an air inlet port 34 opened up along axial direction, and external one end is cylindrical portion 35, opposite end For threaded portion 36, which is inserted in air inlet side interface 28 and terminates in segment difference section 30, and by being assembled in 35 periphery of cylindrical portion Two O-rings 37, generated between cylindrical portion 35 and the contact surface of air inlet side interface 28 appropriate airtight, while using a fastener 38 Inlet suction port 12 is connected to shell 11.The fastener 38 is generally in ㄩ shape, and the ring of 35 front end of cylindrical portion is inserted into via jack 32 In shape groove 39, in this way, inlet suction port 12 is tightly connected in shell 11, for used in connection gas pipeline (not shown).

Air outlet adapter 13 has one to exist along the outlet duct 40 that axial direction opens up and an outer screw section 41, the outer screw section 41 Outside is screwed after assembling an O-ring 42 with outlet side interface 29, in this way, by the airtight shell 11 that is tightened in of air outlet adapter 13 with even Rubber hose (not shown) is connect, the other end of the rubber hose is then connected to gas (not shown).The air inlet port 34, Second housing chamber 24 constitutes a gas access (unnumbered) with outlet duct 40, and gas follows air inlet port 34 and enters the second housing chamber 24, Venthole road 40 is flowed into from the second housing chamber 24 again, is then supplied to gas via rubber hose.

Timer 14 includes a machine core 45, a brake component 46, one instruction disk 47 and a knob 48.The machine core 45 uses one Group screw 49 is locked on one group of column component 50 of the first housing chamber 23 comprising a clockwork spring 51, a shaft 52, one are by several pairs of gears The bracket 54 of the gear train (Gear Train) 53 of composition and a support said modules.The lower end of the shaft 52 has a turntable 55, upper end is equipped with a bar 56, and the circumference of the turntable 55 has a notch 57；The bar 56 and a limit above bracket 54 Position column 58 is cooperated, and the two constitutes the basic limiting device of timer 14, to limit the maximum rotating angle of knob 48.Brake component 46 It is articulated on bracket 54, and cooperates with an elastic slice 59, brake component 46 is fixed in one end of the elastic slice 59, and opposite free end extends To the rear of the wherein pillar 61 of bracket 54；The trip 62 that brake component 46 also extends comprising one towards 55 direction of turntable, this trip 62 It is usually embedded in the notch 57 (Fig. 7) of turntable 55, when turntable 55 is rotated with shaft 52, turntable 55 will push brake component 46 to put outward It is dynamic, make trip 62 exit notch 57 and with the circular contact of turntable 55 (Fig. 9 and 10), while the free end contact of elastic slice 59 is in branch Column 61 makes elastic slice 59 lay in elastic energy, and elastic force makes brake component 46 be maintained at tensioning state whereby, and turns in turntable 55 When positioning, the power source of notch 57 is automatically inserted as trip 62.The instruction disk 47 is assembled in the upper of shell 11 to be round End, the open and close of disk mark, the full-time number and scale the (not shown) printed words such as opened and indicate the time.Knob 48 uses transparent modeling Glue material is made, and is connected to the upper end of shaft 52 and rotates around instruction disk 47, for manually setting closing in limited time for time-delay valve 16 Close time and valve position.Knob 48 includes the arrow 63 and a baffle 64 inwardly projecting from inner circumferential for being formed in upper surface, the arrow First 63 cooperation instruction disk 47 is used to indicate that time and valve position.The baffle 64 and one is from the outwardly projecting limit in the periphery of shell 11 Position plate 33 constitutes auxiliary stopper device, make knob 48 forward/reverse maximum rotating angle terminates in baffle 64 and the same time-division of bar 56 When not touching limit plate 33 and limited post 58 (Fig. 9 and 10).By forward turning knob 48, can be set within certain time Determine gas to prescribe a time limit the shut-in time.(the figure when backwards rotation knob 48 to arrow 63 is directed toward " full-time to open " position on instruction disk 47 10), time-delay valve 16 can be made to remain in the normally open position, timer 14 does not have clocking capability at this time.

In the preferred embodiment, can on partition 22 one steel ball 19 of flexible assembling, steel ball 19 is in shaft 52 whereby Support effect is caused in bottom, moves down when preventing shaft 52 by external force, avoids machine core 45 and loses because shaft 52 declines Function.

Transmission mechanism 15 is arranged in shell 11 and is pushed and swung by brake component 46, to convey straight line to time-delay valve 16 Movement.Transmission mechanism 15 includes a bar axis 65, a rocker arm 66 and a rocking bar 67, which airtight can rotationally run through shell 11 Partition 22, and two ends are kept at the first housing chamber 23 and the second housing chamber 24.It (is not compiled with a screw one end of rocker arm 66 Number) it is locked in the upper end of bar axis 65, the other end is contacted with brake component 46, makes rocker arm 66 that can be pushed by brake component 46 and be put outward It is dynamic.One end of rocking bar 67 is locked in the lower end of bar axis 65 with a screw (unnumbered), and there is an opening 68 to be prolonged with connection for opposite end When valve 16；The actuator arm 69 that rocking bar 67 also intersects forming V-shape with shaft comprising one, effect remain aftermentioned.

Time-delay valve 16 is arranged in the second housing chamber 24, to be opened and closed gas access.Time-delay valve 16 is by a spring base 70, one Valve rod 71, a valve body 72 and a compressed spring 73 are constituted, and wherein spring base 70 is ducted body made of extending downwardly from partition 22, To support valve rod 71 and compressed spring 73.The valve rod 71 is slidably disposed through the centre bore 74 of spring base 70, and has and be in The head 75 and bar tail 76 of opposite end, the diameter of the head 75 are greater than the width of rocking bar opening 68, and are maintained at 67 bar of rocking bar The inside of body, so as to push head 75 to retreat valve rod 71 when rocking bar 67 is swung；Conversely, can be in valve rod 71 because of compression When the elastic force of spring 73 is advanced, 67 backswing of rocking bar is pushed by head 75.Valve body 72 is installed on bar with unification washer 77 Tail 76, with the advance of valve rod 71 and to retreat and actuation reaches and is opened and closed gas path effect at valve opening position and involution valve closing position. 73 snare of compressed spring is in the periphery of valve rod 71, and both ends are held in spring base 70 and washer 77 respectively and are in tensioning state, To make the usual valve closing position for being maintained at occlusion outlet duct 40 of valve body 72 by its elastic force.

As shown in figs. 6 and 7, in 14 stationary state of timer, the trip 62 of brake component 46 is embedded in the notch 57 of turntable 56 Interior, valve body 72 is maintained at valve closing position and occludes outlet duct 40 at this time.

As shown in figures 8 and 9, be directed toward on instruction disk 47 when forward turning knob 48 to arrow 63 "ON" position (Fig. 9 be with Forward turn makes baffle 64 touch limit plate 33 and the illustration of limited post 58 respectively simultaneously with bar 56 to knob 48 to maximum angle), Setting gas prescribe a time limit the shut-in time when, shaft 52 and will drive the clockwork spring 51 inside machine core 45 to crispatura, and make it with knob 48 with turning The rotary motion of certain time can be communicated to gear train 53, reach timing by deposit elasticity energy when this energy discharges slowly Effect；Meanwhile the notch 57 of turntable 56 no longer agrees with trip 62 as turntable 56 and shaft 52 are with turning, change turntable 56 with Its circumference is touched with trip 62, and pushes brake component 46 to be deflected outward when the two is touched, and makes to shake by what bar axis 65 was connected Arm 66 and rocking bar 67 generate identical swing, then convey and move along a straight line from the oscillating motion of rocking bar 67 to valve rod 71, make to be linked to The valve body 72 of valve rod 71 shifts and leaves air outlet adapter 13, opens outlet duct 40, allows gas via connection flow air outlet adapter 13 rubber hose is supplied to gas.When valve rod 71 retreats, compressed spring 73 is accumulated elastic energy by compression simultaneously.

When 14 timing of timer ends (setting time is then), the notch 57 of turntable 56 is by the face with the rotation of turntable 56 To trip 62, turntable 56 is set to disappear by the strength that transmission mechanism 15 is added in time-delay valve 16, then compressed spring 73 is released It is elastic can, by 15 pushed home of transmission mechanism, trip 62 is made to automatically insert the notch 57 of turntable 56, while valve body 72 is also with shaking 67 homing of bar and be sealed at air outlet adapter 13, occlude outlet duct 40, interdict gas automatically, close stove fire, reach energy conservation With security purpose.

As shown in Figure 10, (this when backwards rotation knob 48 to arrow 63 is directed toward " full-time to open " position on instruction disk 47 Figure is so that baffle 64 is touched limit plate 33 and limited post 58 respectively simultaneously with bar 56 with the reverse turn of knob 48 to maximum angle Illustrate), timer 14 will drive time-delay valve 16 to retreat by transmission mechanism 15, keep unimpeded venthole road 40, while shaft 52 with knob 48 reverse when, the effect for clockwork spring 51 of not crispaturaing, thus timer 14 " full-time to open " position without make time-delay valve 16 limit When the function closed.When "ON" on the direction instruction disk 47 of knob arrow 63 or " full-time to open " position, extremely by 48 turn of knob Off-position can force 72 involution valve closing position of valve body, close outlet duct 40.

In the preferred embodiment, as illustrated in figures 5 and 6, it can be set in the safe valve chamber 43 for being formed in 34 leading portion of air inlet port Set a safety valve 17.The safety valve 17 includes an emergency valve seat 78, a bracket 79, a safe valve plug 80 and a compressed spring 81. Emergency valve seat 78 is cylindrical shape, is assembled in peace by the cooperation of negative thread 31 of the pin thread 82 and inflow side interface 28 of its front end Full valve room 43, until contact is in segment difference section 30, and through an O-ring 83 between emergency valve seat 78 and the contact surface of safe valve chamber 43 It is formed reliable airtight.The emergency valve seat 78 has preceding small, the rear big logical circulation road 84 of an internal diameter, and the logical circulation road 84 is because of difference in internal diameters And a cyclic annular segment difference section 85 is formed on its boundary.The bracket 79 includes a sleeve 86 and a rack body 87, the sleeve 86 The back segment of logical circulation road 84 is inserted in the way of interference engagement, until its front end contact is in segment difference section 85；87 one of rack body It is formed in the rear of sleeve 86.The shape of safe valve plug 80 is generally in umbrella, and the center for passing through rack body 87 with one is The slide bar 88 to slide axially freely, the bar tail 89 that the rear end of the slide bar 88 has an outer diameter big compared with its bar diameter is to support compressed spring 81.The compressed spring 81 is assembled on slide bar 88, and contact is distinguished in rack body 87 and bar tail 89, by its bullet in two ends Property power makes safe valve plug 80 be maintained at valve opening position.

As shown in fig. 6, safe 80 front of valve plug is small with the gas pressure difference at rear in gas normal operating condition In the elastic force of compressed spring 81.Therefore, safe valve plug 80 is compeled rearward, to make the logical circulation road 84 of emergency valve seat 78 by the elastic force It keeps unimpeded, the gap that then gas follows rack body 87 circulates road 84 and second housing chamber 24 that arrives, then from the second housing chamber 24 Into after outlet duct 40, gas is supplied to via rubber hose.

As shown in figure 11, when the abnormal conditions that generation such as rubber hose rupture or its front end are fallen off by gas, The gas pressure difference in safe 80 front of valve plug and rear is to be greater than the elastic force of compressed spring 81, allows safe valve plug 80 whereby Before pressure and then it is sealed at segment difference section 85, logical circulation road 84 is occluded, stops gas supply, avoids causing gas explosion.

When safe valve plug 80 is had an effect, artificial turning knob 48 to arrow 63 is directed toward the position of "Off" on instruction disk 47 It sets, makes 72 actuation of valve body of time-delay valve 16 at valve closing position, occlude gas access, interdict gas really.

After the exclusion of above-mentioned unusual condition, turning knob 48 to arrow 63 is directed toward "ON" or " full-time to open " on instruction disk 47 Position, to push safe valve plug is after 80s to move back by the actuator arm 69 of rocking bar 67, and invar stone road has occluded, safe valve plug 80 The gas pressure difference at front and rear disappears, and retreat safe valve plug 80 can by the elastic force of compressed spring 81 and involution valve opening Gas circulation is restored in position.

In addition, the utility model can also move valve chamber 44 in the heat for being formed in 34 back segment of air inlet port and set as illustrated in figures 5 and 6 Set the dynamic valve 18 of a heat.The dynamic valve chamber 44 of heat is preceding small, the rear big different diameter hole of an internal diameter, and forms a cyclic annular segment difference section between 60.The dynamic valve 18 of heat includes that 90, one heat of a bracket moves valve plug 91, a compressed spring 92 and eutectic solder 93, wherein bracket 90 include a cylindric bracket body 94, and from the periphery of bracket body 94 to several fins 95 of external radiation, the bracket 90 On the one hand interference engagement is generated by the inner wall of the outer rim of fin 95 and the dynamic valve chamber 44 of heat, on the one hand passes through the leading edge top of fin 95 It is butted on segment difference section 60, and reaches the effect for being fixed on the dynamic valve chamber 44 of heat.Bracket body 94 is general cylindrical, and inside has a sets of holes 96 move the compressed spring 92 of valve plug 91 with part with the heat of receiving portion.The dynamic valve plug 91 of heat is welded on eutectic solder 93 The front of bracket 90 is usually kept spaced from the valve opening position of the dynamic valve seat 20 of heat.Eutectic solder 93 is using in temperature 80 and 100 DEG C Range is fusible kamash alloy and is made.The dynamic valve seat 20 of heat is a ring-type being formed between safe valve chamber 33 and the dynamic valve chamber 43 of heat Segment difference section.The dynamic valve plug 91 of heat is also axially rearwardly extending comprising one, and being inserted in is the short tube 97 to slide axially freely in sets of holes 96, The inner tubal wall of the short tube 97 defines a chamber 98, and to receive 88 back segment of slide bar and bar tail 89 of safe valve plug 80, this design has Help shorten the length of inlet suction port 12.The back segment of compressed spring 93 is inserted in the sets of holes 96 of bracket body 94, and leading portion is around short The outer tube wall of pipe 97, and both ends are respectively supported at bracket body 94 and the dynamic valve plug 91 of heat and are in tensioning state, to lay in elasticity Energy.

When gas closes device 10 because when the factors such as fire are heated in limited time, by heat-conduction effect, can rapidly by into The temperature of gas connector 12 reaches eutectic solder 93；When the temperature of eutectic solder 93 is higher than its fusing point and melts, will lose The effect of the fixed dynamic valve plug 91 of heat, then the dynamic valve plug 91 of heat is advanced with the elastic force of compressed spring 92, and is being detached from bracket body In 94 way, by being slidably matched for short tube 97 and sets of holes 96, the dynamic valve plug 91 of heat is made impartially to be sealed at the dynamic valve seat 20 of heat, It is formed between the contact surface of the two airtight and occludes air inlet port 34 simultaneously, interdicted gas, avoid greater disaster.

Since safety valve 17 includes elongated compressed spring 81, and gas is supplied to by gas transfer pipeline Gas usually contains the impurity of solid.Iron rust, dust in gas transfer pipeline etc. are the main pollution sources of solid impurity.This It is accumulating over a long period in compressed spring 81 as a result, the spring can be made to lose effectiveness if a little pollutants do not remove in advance, and then allow peace Full valve plug 80 can not normal actuation.Therefore, in the preferred embodiment, as illustrated in figures 5 and 6, the utility model also includes a filter Net 99, which is made circle using stainless (steel) wire, and is locked on the bracket body 94 of the dynamic valve 18 of heat with a screw 100, The solid impurity flowed into gas is filtered out whereby, avoids the accumulation of these pollutants in the compressed spring 81 of safety valve 17, it is ensured that Safe valve plug 80 being capable of normal actuation.

Certainly, above-described embodiment can be subject to several variations in the case where not departing from the scope of the utility model, therefore above explanation Include and whole item shown in the drawings should be regarded as illustrative, rather than applies for a patent model to limit the utility model It encloses.

Claims (4)

1. It include a shell 1. a kind of gas closes device in limited time, which has one first housing chamber and one second housing chamber, the shell Side connect an inlet suction port, the other side connects an air outlet adapter, which opens up an air inlet port along axial direction, should go out Gas connector opens up an outlet duct along axial direction, and the air inlet port, the second housing chamber and outlet duct constitute a gas access；The gas Timing means also include one be located at the timer of first housing chamber, one be set to second housing chamber time-delay valve and one across this One and second housing chamber transmission mechanism；The timer includes a machine core and a knob, which includes a bracket and a shaft, is somebody's turn to do The upper surface of bracket is equipped with a limited post, which is radially equipped with a bar, which is connected to the shaft and is maintained at the shell The top of body supplies artificial turn；When forward the turn knob sets the shut-in time in limited time of the time-delay valve, or inversely turn rotation For button to when to be directed toward the time-delay valve be open position, which drives the time-delay valve actuation at valve opening position by the transmission mechanism, Keep the outlet duct unimpeded；End when the timer and when reaching setting time or the turn knob is to being directed toward the delay Valve be closed position when, the time-delay valve involution valve closing position and occlude the outlet duct；

   It is characterized in that, the periphery of the shell has an outwardly projecting limit plate, it is inwardly projecting that the inner circumferential of the knob is equipped with one Baffle, the knob forward/reverse maximum rotating angle terminates in the baffle and touches the limit plate respectively simultaneously with bar and limit When column.
2. 2. gas as described in claim 1 closes device in limited time, which is characterized in that first housing chamber and second housing chamber It is isolated by a partition, one steel ball of partition over-assemble, the bottom of the shaft is supported on the steel ball.
3. 3. gas as described in claim 1 closes device in limited time, which is characterized in that further include one and be set in the air inlet port Safety valve, which automatically closes up the air inlet port in gas flow exception.
4. 4. gas as described in claim 1 closes device in limited time, which is characterized in that further include one and be set in the air inlet port Heat move valve, which moves valve and automatically closes up when temperature is higher than limiting temperature the air inlet port.