CN105546168A - Automatic gas safety valve - Google Patents
Automatic gas safety valve Download PDFInfo
- Publication number
- CN105546168A CN105546168A CN201610112951.7A CN201610112951A CN105546168A CN 105546168 A CN105546168 A CN 105546168A CN 201610112951 A CN201610112951 A CN 201610112951A CN 105546168 A CN105546168 A CN 105546168A
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- China
- Prior art keywords
- valve
- bonnet
- spring
- fixing frame
- automatic safety
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/14—Joints for pipes of different diameters or cross-section
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The invention provides an automatic gas safety valve and belongs to the technical field of valves. The problem that an existing gas safety valve is prone to fail is solved. The automatic gas safety valve comprises a valve element. The valve element comprises a valve element sleeve. A gas valve bracket with a first gas hole is fixed to the front end of the valve element sleeve. A fixing frame with a second gas hole is arranged at the rear end of the valve element sleeve. A valve cap for sealing the first gas hole is arranged in the valve element sleeve. A reset spring is connected between the valve cap and the gas valve bracket. A temperature control spring coaxial with the reset spring is arranged between the valve cap and the fixing frame. The rear end of the temperature control spring is connected with the fixing frame. When the temperature control spring extends, the front end of the temperature control spring abuts against the valve cap and the first gas hole is sealed by the valve cap. According to the safety valve, automatic gas leakage protection is achieved, automatic fire protection is achieved, and the safety valve is not prone to fail.
Description
Technical field
The invention belongs to valve technology field, relate to a kind of pipeline valve, particularly relate to a kind of automatic safety gas valve.
Background technique
Along with the development of society, the extensive use of new energy, combustion gas has become industry and necessary fuel energy in life.Use in gas process resident, aging due to gas pipeline and link, often cause gas leakage, thus the poisoning or explosive accident of combustion gas occurs.
The pipeline gas that Chinese patent literature data openly proposes reveals Safety valve [application number: CN01233581.9; Authorization Notice No.: CN2498423Y], this Safety valve comprises: valve body, back-up ring, filter screen, elastic seal ring, spherical valve, joint nut, spherical valve control valve rod, outside thread hollow screw, handle, sunk screw, elasticity cover plate; Be provided with ring-shaped step in one end of spherical valve through hole, equipped fixed air vavle shelf on ring-shaped step, air valve frame assembles valve rod valve plate, and the outer Clip Reed of spring is positioned at valve rod valve plate on air valve frame.This valve has the function of protection automatically, when pipeline, because of damaged, the situation of gas leakage occurs, can automatically be blocked by gas in pipelines passage, realizes gas pipeline protection and safety control automatically itself.But this security valve only could realize gas leakage protection automatically when valve is opened completely; Valve be in be not complete opening state as semi-open state pipeline occur reveal time, valve can not realize automatically being blocked by gas in pipelines passage, and the leakage automatic protector of valve easily lost efficacy.Nor can breaking out of fire or environment temperature too high time automatically block passage.
A kind of automatic fuel-gas fire-proof safety valve device [application number: CN03205587.0 that Chinese patent literature data openly proposes; Authorization Notice No.: CN2753932Y], comprise valve body, heat responsive element, holding frame, passageway break mechanism, the entry port of valve body has pipe thread, discharge port has pipe thread, passageway break mechanism is provided with between the entry port of valve body and discharge port, passageway break mechanism is provided with and connects slide bar, separating element, elastic element and sealing material, connects slide bar between heat responsive element and separating element, valve body be connected slide bar have sealing material.When ambient temperature is greater than setting temperature, heat responsive element is cracked, and under the action of the spring, connection slide bar, separating element move down, and the instantaneous element that is cut off of passage cut off.The advantage such as there is full-automatic, double seal, good seal performance, reliable performance, high temperature resistant, Security is good.But the heat responsive element in this relief valve device can not re-use once cracked just inefficacy, and need the relief valve device more renewed, user cost is high.
Summary of the invention
The object of the invention is the problems referred to above existed for prior art, propose a kind of automatic safety gas valve not easily lost efficacy.
Object of the present invention realizes by following technical proposal:
A kind of automatic safety gas valve, comprise spool, described spool comprises valve core housing, the front end of described valve core housing is fixed with the air valve frame with pore one, and the rear end of described valve core housing is provided with the fixing frame with pore two, is provided with the bonnet for sealed porosity one in described valve core housing, it is characterized in that, be connected with Returnning spring between described bonnet and air valve frame, be provided with the temperature control spring with Returnning spring coaxial line between described bonnet and fixing frame, the rear end of described temperature control spring is connected with fixing frame; When described temperature control spring elongates, the front end of described temperature control spring to be pressed on bonnet and pore one is closed by bonnet.
Combustion gas is entered in valve core housing by the pore two of fixing frame, then flows out spool from the pore one of air valve frame.Can to bonnet generation thrust backward when Returnning spring is compressed; Gas flow is when bonnet, and combustion gas applies pressure forward to bonnet.When combustion gas is at normal flow rate, the pressure that bonnet is subject to is identical with the size of thrust, is in dynamic stress state of equilibrium, so bonnet can not to abut on air valve frame and to be closed by pore one, combustion gas simultaneously can walk around pore one outflow of bonnet from air valve frame, and arranged at safety valve is in open mode.When leaking appears in combustion gas; increased by gas flow during bonnet; combustion gas is to the pressure increase of bonnet; when the thrust backward that Returnning spring produces can not resist the pressure of combustion gas generation; bonnet can not keep dynamic stress state of equilibrium; bonnet to be pressed against on air valve frame thus pore one is closed by bonnet by combustion gas, and now safety valve cuts out, and therefore safety valve has the automatic protective action of gas leakage.After the leakage point of combustion gas is repaired, the flow of combustion gas recovers normal, and bonnet is subject to combustion gas pressure forward to be reduced, and the bonnet spring that is reset is pushed open, and the pore one on air valve frame is opened, and combustion gas is flowed out from pore one again, and now safety valve is opened automatically.Combustion gas leak source is repaired rear safety valve and can normally uses again, and safety valve can be reused and not easily lose efficacy.
Temperature control spring under normal temperature state is in compressive state; temperature control spring during compression can not to act on bonnet and pore one is closed by bonnet; also just make; when normal temperature state; the setting of temperature control spring can not have influence on bonnet and Returnning spring with the use of, the realization of safety valve gas leakage automatic protection functions can not be affected.When temperature is elevated to the deformation temperature of temperature control spring, temperature control spring elongates, its front end to be resisted against on bonnet and pore one is closed by bonnet, and now safety valve cuts out, and therefore safety valve has fire automatic protection effect.When the deformation temperature of temperature lower than temperature control spring, temperature control spring reverts to compressive state and can not act on bonnet, and the bonnet spring that is reset is pushed open, and the pore one on air valve frame is opened, and combustion gas is flowed out from pore one again, and safety valve is opened.After temperature return is normal, safety valve can normally use again, and safety valve can be reused and not easily lose efficacy.Temperature control spring and Returnning spring are coaxially set, and bonnet can be avoided to be subject to the effect of moment and to produce upset, avoid spool to lose efficacy, thus safety valve was not easily lost efficacy.
Being equipped with and using of Returnning spring, bonnet and temperature control spring in valve core housing, makes safety valve be swift in response when realizing wheel leakage protective and fire protection and can repeat to realize, has the characteristic not easily lost efficacy.And such valve core structure is simply compact, safety valve installation is made to occupy space little.
In above-mentioned automatic safety gas valve, cylindrically, described bonnet and air valve frame be arranged in parallel and the axes normal of bonnet and valve core housing described valve core housing, the described axis of temperature control spring and the axis collinear of valve core housing.
Valve core housing is cylindrically conducive to combustion gas and is uniformly distributed in valve core housing, thus makes the pressure distribution of combustion gas to bonnet even.Air valve frame and bonnet be arranged in parallel and with the axes normal of valve core housing; the axis of Returnning spring and the axis of temperature control spring and the axis collinear of valve core housing; these are all conducive to bonnet uniform force, be conducive to the realization of the automatic protection of safety valve, safety valve was not easily lost efficacy.
In above-mentioned automatic safety gas valve, described bonnet is in the form of annular discs and be made up of soft material, the front-end face of described bonnet has sealing bulge loop, when described sealing bulge loop and air valve frame ear end face against time pore one close.
The bonnet that soft material is made can be sealed and matched with air valve frame well and realize closing of pore one, the gap that may exist before reducing bonnet and air valve frame, thus safety valve was not easily lost efficacy.Bonnet arranges sealing bulge loop on front-end face simultaneously, can alleviate the weight of bonnet self.Safety valve is generally that level is installed, if but safety valve can not keep level after mounting, the own wt of spool will affect the action of bonnet thus safety valve may be caused to lose efficacy, and can reduce this impact, safety valve was not easily lost efficacy by the weight reducing bonnet self.
In above-mentioned automatic safety gas valve, automatic safety gas valve also comprises outlet nozzle, front valve pocket and rear valve pocket, the rear end of described outlet nozzle is fixedly connected with the front end of front valve pocket, and the front-end and back-end of described valve core housing are inserted into respectively in front valve pocket and rear valve pocket also to be formed and are threaded.
Safety valve directly can be connected with the connecting tube on gas cooker by outlet nozzle, make gas pipeline quick for installation.Valve core housing is threaded with front valve pocket and rear valve pocket, facilitates dismounting and the safety valve connection in the duct of spool.
In above-mentioned automatic safety gas valve, Compress Spring is provided with between described air valve frame and outlet nozzle, pad is provided with between described outlet nozzle and Compress Spring, the inwall of described outlet nozzle rear end is provided with ring-type shoulder block, described pad is resisted against on ring-type shoulder block, the front end of described Compress Spring is resisted against on pad, and the rear end of described Compress Spring is resisted against on air valve frame.
If air valve frame can not be fixed on the front end of valve core housing, spool will lose efficacy.Compress Spring acts on air valve frame and air valve frame is tightly resisted against on the front-end face of valve core housing, and make air valve frame not easily depart from valve core housing, safety valve not easily lost efficacy.Pad is resisted against on ring-type shoulder block, and one end of Compress Spring is resisted against on pad; After using pad between Compress Spring and ring-type shoulder block, Compress Spring can not directly be resisted against on ring-type shoulder block, thus outlet nozzle is not easily damaged by pressure, and safety valve was not easily lost efficacy.
In above-mentioned automatic safety gas valve, described air valve frame comprises chassis, and described chassis is in the form of annular discs and have described pore one, and the front end on described chassis has the U-shaped support protruded forward, and described U-shaped support has the pilot hole arranged vertically; The front-end face of described bonnet is fixedly connected with guide rod, and described guide rod is through pilot hole, and described Returnning spring is sleeved on guide rod, and described Returnning spring front end is resisted against on U-shaped support, and the rear end of described Returnning spring is resisted against on bonnet; Described guide rod front end outer side mask limited location groove, snap in spacing card in described restraining groove, described spacing card can be resisted against on the front-end face of U-shaped support.
The setting of guide rod and pilot hole makes bonnet seesaw vertically, can prevent the situation that cannot seal pore one that bonnet causes because of dislocation.Returnning spring pushes bonnet open when normal flow rate, makes the gas circuit in safety valve keep on state, prevents bonnet from being sealed by pore one in normal using process thus causing gas circuit in safety valve to be cut off.Spacing card can prevent guide rod from departing from pilot hole, thus ensures the normal use of safety valve.These settings can prevent safety valve from occurring the situation that can not normally use, and ensure that safety valve not easily lost efficacy.
In above-mentioned automatic safety gas valve, described fixing frame is in the form of annular discs and be fixedly connected with screw, and described screw is formed be threaded through fixing frame forward vertically, has spring pad between described screw and fixing frame; The stud of described screw is set with described temperature control spring.
Spring pad not easily loosens after screw can be made to be fixed on fixing frame; Stud has leading role, and temperature control spring can be stretched vertically, and bonnet can be made when temperature control spring extends vertically to close pore one on air valve frame rapidly.The fixing frame being connected with screw improves the accuracy in temperature control spring action direction, and safety valve was not easily lost efficacy.
In above-mentioned automatic safety gas valve, the front-end face of described valve core housing is provided with annular recess one, the chassis of described air valve frame is fitted in annular recess one; The ear end face of described valve core housing is provided with annular recess two, described fixing frame is fitted in annular recess two.
Valve core housing front/rear end arranges the installation that annular recess facilitates air valve frame and fixing frame, makes air valve frame and fixing frame be fixedly connected on better on the front/rear end of valve core housing simultaneously, be conducive to the normal use of safety valve, ensure that safety valve not easily lost efficacy.
In above-mentioned automatic safety gas valve, the front inner wall of described rear valve pocket is provided with annular shoulder, has seal ring one between described fixing frame and annular shoulder, the front-end and back-end of described seal ring one are resisted against on fixing frame and annular shoulder respectively.
Seal ring one and between fixing frame and annular shoulder against making fixing frame be fixed on the ear end face of valve core housing, seal ring one has seal action and can prevent combustion gas from spilling from the seam crossing of spool and rear valve pocket.
In above-mentioned automatic safety gas valve, the rear end of described rear valve pocket is connected with reducer union.
Select suitable reducer union can facilitate the connection of pipeline.
In above-mentioned automatic safety gas valve, the outside middle portion of described reducer union being provided with cross section is orthohexagonal clamping part, formed and be threaded in the rear end that the front end of described reducer union is inserted into rear valve pocket, the rear end outer side surface of described reducer union is provided with standard thread.
After the middle part of reducer union arranges clamping part, utilize clamping part reducer union can be in place by the feature that spanner clamps.The front end of reducer union is threaded with rear valve pocket and makes the easy to connect of reducer union and rear valve pocket.The standard thread of the rear end of reducer union can be arranged to different models as required, conveniently matches connection.
In above-mentioned automatic safety gas valve, the rear end of described reducer union is connected with pipe joint, the outer wall of described pipe joint is provided with annular projection, described annular projection is socketed with tightening nuts, between described tightening nuts and pipe joint rear end, be provided with elastic collar.
It is convenient to be facilitated by pipe joint connection suction tude.By tightening nuts and elastic collar can by suction tude more frame be connected to securely on pipe joint.
In above-mentioned automatic safety gas valve, in described rear valve pocket, be connected with ball valve.
The combustion gas of ball valve hand switch can be passed through.When leakage or breaking out of fire occur in combustion gas, manual-lock ball valve while safety valve spool is closed automatically, has the effect of duplicate protection; Also ensure that simultaneously and also can close combustion gas when spool lost efficacy.Ball valve is arranged in rear valve pocket jointing when decreasing independent mounting ball valve, decreases the generation of leak source, ensure that the normal work of safety valve.
In above-mentioned automatic safety gas valve, described pad comprises 4 at circumferentially equally distributed arc plate, the external arc limit of 4 described arc plates is circumferentially same, and the Inner arc limit of 4 described arc plates is connected to the strip-shaped blade of strip, and 4 described strip-shaped blade are interconnected.
4 strip-shaped blade and arc plate composition pad make the structure of pad more stable, be conducive to Compress Spring against, safety valve was not easily lost efficacy.
Compared with prior art, this automatic safety gas valve has the following advantages:
While valve core housing front end arranges bonnet fixing frame composite structure, fixing frame temperature control spring assembly structure is set in valve core housing rear end; not only achieve the automatic protection of gas leakage but also achieve fire automatic protection; and these structures just can not lose efficacy after one-off, made safety valve not easily lose efficacy.Have employed Returnning spring, guide rod and pilot hole and spacing card in bonnet fixing frame composite structure, make bonnet working stability reliable, thus ensure that safety valve not easily lost efficacy.Have employed screw and spring pad in fixing frame temperature control spring assembly structure, make temperature control spring action accurately and reliably.Air valve frame and fixing frame are fitted in the annular recess of valve core housing, facilitate the installation of safety valve; On safety valve, assembling reducer union and pipe joint etc., facilitate the connection of suction tude; In safety valve, assemble ball valve, ensure that and also can close combustion gas when spool lost efficacy.
Accompanying drawing explanation
Fig. 1 is the structural representation of safety valve;
Fig. 2 is the structural representation of spool in safety valve;
Fig. 3 is the combination stereogram of air valve frame and bonnet in safety valve;
Fig. 4 is the combination stereogram of fixing frame and temperature control spring in safety valve;
Fig. 5 is the structural perspective of safety valve Intermediate gasket;
Fig. 6 is the structural perspective of reducer union in safety valve;
Fig. 7 is the phase diagram of the spool in safety valve when normal use;
Fig. 8 is the phase diagram of the spool in safety valve when combustion gas occurs to reveal;
Fig. 9 is the phase diagram of the spool in safety valve when breaking out of fire.
In figure, 1, outlet nozzle; 1a, ring-type shoulder block; 2, front valve pocket; 3, spool; 3a, valve core housing; 3a1, annular recess one; 3a2, annular recess two; 3b, air valve frame; 3b1, chassis; 3b2, pore one; 3b3, U-shaped support; 3b4, pilot hole; 3c, bonnet; 3c1, sealing bulge loop; 3d, guide rod; 3d1, restraining groove; 3e, Returnning spring; 3f, spacing card; 3g, fixing frame; 3g1, pore two; 3h, temperature control spring; 3i, spring pad; 3j, screw; 4, rear valve pocket; 4a, annular shoulder; 4b, ball valve; 5, pad; 5a, arc plate; 5b, strip-shaped blade; 6, Compress Spring; 7, seal ring one; 8, reducer union; 8a, clamping part; 9, pipe joint; 9a, annular projection; 10, tightening nuts; 11, elastic collar.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one
As shown in Figure 1, automatic safety gas valve comprise connect successively outlet nozzle 1, front valve pocket 2, spool 3, rear valve pocket 4, reducer union 8 and pipe joint 9.The front end outer side face of outlet nozzle 1 is provided with 2 ~ 5 trapezoidal bulge loops, is preferably 3; The front end outer side face of outlet nozzle 1 is also provided with annular boss after trapezoidal bulge loop; The rear end outer side surface of outlet nozzle 1 is provided with 2 ~ 5 annular seal grooves, be preferably 3, in annular seal groove, correspondence is set with seal ring two; The inwall of outlet nozzle 1 rear end is provided with ring-type shoulder block 1a.The front inner wall of front valve pocket 2 arranges bulge loop; The rear end of front end the past valve pocket 2 of outlet nozzle 1 is inserted, and on the bulge loop that the annular boss on outlet nozzle 1 outer wall is resisted against on front valve pocket 2 inwall, seal ring two is close on the inwall of front valve pocket 2; The joint glue of outlet nozzle 1 and front valve pocket 2 can be adhesively fixed.Spool 3 comprises valve core housing 3a, and the front-end and back-end of valve core housing 3a are inserted into respectively in front valve pocket 2 and rear valve pocket 4 also to be formed and are threaded.
As shown in Figures 2 and 3, valve core housing 3a cylindrically, its front-end face is provided with annular recess one 3a1, the ear end face of valve core housing 3a is provided with annular recess two 3a2.Air valve frame 3b comprises chassis 3b1 in the form of annular discs, the chassis 3b1 of air valve frame 3b to be fitted in annular recess one 3a1 and with the axis perpendicular of valve core housing 3a; Chassis 3b1 has pore one 3b2, the bottom of front end one-body molded oriented front the U-shaped support 3b3 protruded, the U-shaped support 3b3 of chassis 3b1 has the pilot hole 3b4 arranged along valve core housing 3a axial direction.Being provided with in the valve core housing 3a of 3b1 rear end, chassis can along the bonnet 3c of valve core housing 3a axial direction movement, bonnet 3c is made up of soft material (as rubber), bonnet 3c is in the form of annular discs and parallel with chassis 3b1, the front-end face of bonnet 3c is provided with sealing bulge loop 3c1.In the process of bonnet 3c movement, seal bulge loop 3c1 can be resisted against on the 3b1 of chassis and pore one 3b2 is closed.The front-end face of bonnet 3c is fixedly connected with the guide rod 3d arranged along valve core housing 3a axial direction, guide rod 3d is through pilot hole 3b4, Returnning spring 3e is sleeved on guide rod 3d, the front end of Returnning spring 3e is resisted against on U-shaped support 3b3, and the rear end of Returnning spring 3e is resisted against on the front-end face of bonnet 3c.Guide rod 3d front end outer side mask limited location groove 3d1, snap in spacing card 3f in restraining groove 3d1, spacing card 3f is positioned at before U-shaped support 3b3, and can be resisted against on U-shaped support 3b3 front-end face in the process seesawed at guide rod 3d.
As shown in Figure 2 and Figure 4, fixing frame 3g is in the form of annular discs and have pore two 3g1, and fixing frame 3g is fitted in annular recess two 3a2; Screw 3j is also formed through fixing frame 3g forward along valve core housing 3a axial direction and is threaded, and has spring pad 3i between screw 3j and fixing frame 3g; The stud of screw 3j is set with temperature control spring 3h, temperature control spring 3h and Returnning spring 3e coaxial line and with the axis collinear of valve core housing 3a, the rear end of temperature control spring 3h is connected with fixing frame 3g, and the front end of temperature control spring 3h faces bonnet 3c; When temperature control spring 3h extends, the front end of temperature control spring 3h to be pressed on bonnet 3c and pore one 3b2 closes by the chassis 3b1 making the sealing bulge loop 3c1 on bonnet 3c be resisted against air valve frame 3b.Temperature control spring 3h is compressive state when normal temperature state, as shown in Figure 2 and Figure 7.In the condition of high temperature as when more than 70 DEG C being elongation state, as shown in Figure 9; When the condition of high temperature, the front end of temperature control spring 3h can be resisted against on bonnet 3c and to promote bonnet 3c and be closed by pore one 3b2.During design screw 3j, also can select stud suitable length and the screw 3j on bonnet 3c can be resisted against, making user can be regulated the size of air demand in the length of fixing frame front end by the stud of adjusting screw 3j.Also can by the machine shaping of fixing frame 3g and valve core housing 3a one.Also on the front-end face of fixing frame 3g, directly can connect temperature control spring 3h, round bar also can be set on the front-end face of fixing frame 3g or hollow out pole pair temperature control spring 3h leads.The external diameter size of temperature control spring 3h can be identical with the diameter of bonnet 3c, also can be less than the diameter of bonnet 3c.
As shown in Figure 1, Compress Spring 6 is provided with between air valve frame 3b and outlet nozzle 1, pad 5 is provided with between outlet nozzle 1 and Compress Spring 6, pad 5 is resisted against on ring-type shoulder block 1a, the front end of Compress Spring 6 is resisted against on pad 5, and the rear end of Compress Spring 6 to be sleeved on U-shaped support 3b3 and to be resisted against on the 3b1 of chassis.The front inner wall of rear valve pocket 4 is provided with annular shoulder 4a, has seal ring 1 between fixing frame 3g and annular shoulder 4a, the front-end and back-end of seal ring 1 are resisted against on fixing frame 3g and annular shoulder 4a respectively; Ball valve 4b is connected with in rear valve pocket 4; The rear end of rear valve pocket 4 has been threaded reducer union 8.The rear end of reducer union 8 has been threaded pipe joint 9, the outer wall of pipe joint 9 is provided with annular projection 9a, annular projection 9a is socketed with tightening nuts 10, be provided with elastic collar 11 between tightening nuts 10 and pipe joint 9 rear end; Pipe joint 9 rear end can connect suction tude.
As shown in Figure 5, pad 5 has 4 external arc limits at circumferentially equally distributed arc plate 5a, 4 arc plate 5a circumferentially same, and the Inner arc limit of 4 arc plate 5a is connected to the strip-shaped blade 5b of strip, and 4 strip-shaped blade 5b are interconnected.
As shown in figures 1 to 6, formed and be threaded in the rear end that the front end of reducer union 8 can be inserted into rear valve pocket 4, the rear end outer side surface of reducer union 8 is provided with standard thread, suitable standard thread model can be selected as required, reducer union 8 is matched with pipe joint 9 and is connected.The outside middle portion of reducer union 8 being provided with cross section is orthohexagonal clamping part 8a.When reducer union 8 is installed, blessing portion 8a can be clamped with spanner and reducer union 8 is in place, can avoid like this using in spanner process the worm tooth generation destruction in reducer union 8.
As shown in Figure 1, the ball valve 4b be connected in rear valve pocket 4 comprises ball core, valve rod, ball core seal ring one, ball core seal ring two and handle.Ball core is arranged in rear valve pocket 4, and ball core ribbon has the vent of the front-end and back-end that can be communicated with rear valve pocket 4.The lower end of valve rod is connected with ball core, and the upper end of valve rod passes rear valve pocket 4 and is connected with handle afterwards, is provided with valve stem packing ring between valve rod and rear valve pocket 4.Handle can be butterfly-shaped or strip, and fastening piece can be utilized to be fixedly connected with valve rod by handle.Handle with sleeve can be with ovable valve stem and ball core to rotate, and makes ball core can be communicated with or block the front-end and back-end of rear valve pocket 4.The inwall of rear valve pocket 4 rear end is provided with ball core shoulder block, ball core seal ring one is resisted against on ball core shoulder block, ball core seal ring two is resisted against on the front-end face of reducer union 8, and ball core to be arranged between ball core seal ring one and ball core seal ring two and to be resisted against on ball core seal ring one and ball core seal ring two.If ball valve 4b can not be connected in rear valve pocket 4, also at the fuel gas ball valve of the direct connection universal in rear end of rear valve pocket 4, the hand switch function of safety valve can be realized.
During installation, outlet nozzle 1 and front valve pocket 2 fixedly mount well, again the rear end of pad 5 the past valve pocket 2 is put into and made pad 5 be resisted against on ring-type shoulder block 1a, again air valve frame 3b is fixed in annular recess one 3a1 of valve core housing 3a, again the rear end of Compress Spring 6 is sleeved on the U-shaped support 3b3 of air valve frame 3b, the rear end again front end of valve core housing 3a being inserted into front valve pocket 2 is also formed and is threaded, now the front end of Compress Spring 6 is resisted against on pad 5, the rear end of Compress Spring 6 is resisted against on the chassis 3b1 of air valve frame 3b, air valve frame 3b is fixed on the front-end face of valve core housing 3a.
Then be fit into ball valve 4b by rear valve pocket 4, then after being inserted the front end of reducer union 8, the rear end formation of valve pocket 4 is threaded, and by the front end of reducer union 8, ball valve 4b is fixed in rear valve pocket 4.Again seal ring 1 is resisted against annular shoulder 4a from the front loaded of rear valve pocket 4, again fixing frame 3g is fixed in annular recess two 3a2 of valve core housing 3a, the rear end again front end sleeve of rear valve pocket 4 being contained in valve core housing 3a is also formed and is threaded, and now the front end of seal ring 1 is resisted against on fixing frame 3g.Finally connecting tube joint 9 on the rear end of reducer union 8.
Outlet nozzle 1 front end connects steam outlet pipe, and the rear end of pipe joint 9 connects suction tude.Need to open ball valve 4b when connecting combustion gas, combustion gas by after pipe joint 9, reducer union 8, rear valve pocket 4 and ball valve 4b, spool 3, front valve pocket 2 and outlet nozzle 1, is flowed out from steam outlet pipe successively.Combustion gas, when spool 3, first enters valve core housing 3a by pore two 3g1 of fixing frame 3g.If the flow of combustion gas is normal, as shown in Figure 7, under the effect of Returnning spring 3e, combustion gas can not make bonnet 3c close pore one 3b2 on air valve frame 3b, and combustion gas is flowed out from pore one 3b2.When leak source appears in pipeline, combustion gas leaks out and causes ducted gas flow to increase from leak source, and as shown in Figure 8, the combustion gas of large discharge promotes bonnet 3c sealed porosity one 3b2, and pipeline gas circuit is cut off, and safety valve cuts out.Returnning spring 3e compression during bonnet 3c sealing pore one 3b2, after ducted leak source is repaired, gas flow recovers normal, and Returnning spring 3e pushes bonnet 3c open, and combustion gas is flowed out again from pore one 3b2, and safety valve reopens.
As shown in Figure 7, use safety valve under Normal Environmental Temperature, temperature control spring 3h is in contraction state, and temperature control spring 3h during contraction state can not promote bonnet 3c sealed porosity one 3b2, and combustion gas is flowed out from pore one 3b2.As shown in Figure 9, when ambient temperature is in the condition of high temperature, after such as breaking out of fire, ambient temperature is more than 70 DEG C, temperature control spring 3h extends, its rear end against or be fixed on fixing frame 3g, its front end to be resisted against on bonnet 3c and to make bonnet 3c sealed porosity one 3b2, and safety valve is closed.When ambient temperature is recovered normal, temperature control spring 3h recovers in contraction state, and bonnet 3c is open under the effect of Returnning spring 3e, and combustion gas is flowed out from pore one 3b2, and safety valve is opened.When there is gas leakage or fire, safety valve can automatically shut down; After leak source reparation or fire terminate, safety valve also can conducting automatically again.Safety valve has automatic leakage air protection and fire protective function, and safety valve is not the part that namely single use lost efficacy simultaneously, can reuse and not easily lose efficacy.What safety valve adopted is mechanicalness device, is not afraid of greasy dirt impurity, not easily loses efficacy, long service life.Safety valve, except having automatic protective action, also has hand switch function, even if spool 3 lost efficacy, also can pass through ball valve 4b manual-lock safety valve, make safety valve have double protection.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (14)
1. an automatic safety gas valve, comprise spool (3), described spool (3) comprises valve core housing (3a), the front end of described valve core housing (3a) is fixed with the air valve frame (3b) with pore one (3b2), the rear end of described valve core housing (3a) is provided with the fixing frame (3g) with pore two (3g1), the bonnet (3c) for sealed porosity one (3b2) is provided with in described valve core housing (3a), it is characterized in that, Returnning spring (3e) is connected with between described bonnet (3c) and air valve frame (3b), the temperature control spring (3h) with Returnning spring (3e) coaxial line is provided with between described bonnet (3c) and fixing frame (3g), the rear end of described temperature control spring (3h) is connected with fixing frame (3g), when described temperature control spring (3h) is extended, the front end of described temperature control spring (3h) is pressed on bonnet (3c) and goes up and pore one (3b2) is closed by bonnet (3c).
2. automatic safety gas valve according to claim 1, it is characterized in that, described valve core housing (3a) cylindrically, described bonnet (3c) and air valve frame (3b) be arranged in parallel and axes normal, the axis of described temperature control spring (3h) and the axis collinear of valve core housing (3a) of bonnet (3c) and valve core housing (3a).
3. automatic safety gas valve according to claim 1, it is characterized in that, described bonnet (3c) is in the form of annular discs and be made up of soft material, the front-end face of described bonnet (3c) has sealing bulge loop (3c1), when described sealing bulge loop (3c1) and air valve frame (3b) ear end face against time pore one (3b2) close.
4. automatic safety gas valve according to claim 1, it is characterized in that, automatic safety gas valve also comprises outlet nozzle (1), front valve pocket (2) and rear valve pocket (4), the rear end of described outlet nozzle (1) is fixedly connected with the front end of front valve pocket (2), and the front-end and back-end of described valve core housing (3a) are inserted into respectively in front valve pocket (2) and rear valve pocket (4) also to be formed and are threaded.
5. automatic safety gas valve according to claim 4, it is characterized in that, Compress Spring (6) is provided with between described air valve frame (3b) and outlet nozzle (1), pad (5) is provided with between described outlet nozzle (1) and Compress Spring (6), the inwall of described outlet nozzle (1) rear end is provided with ring-type shoulder block (1a), described pad (5) is resisted against on ring-type shoulder block (1a), the front end of described Compress Spring (6) is resisted against on pad (5), the rear end of described Compress Spring (6) is resisted against on air valve frame (3b).
6. automatic safety gas valve according to claim 1, it is characterized in that, described air valve frame (3b) comprises chassis (3b1), described chassis (3b1) is in the form of annular discs and have described pore one (3b2), the front end on described chassis (3b1) has the U-shaped support (3b3) protruded forward, described U-shaped support (3b3) has the pilot hole (3b4) arranged vertically; The front-end face of described bonnet (3c) is fixedly connected with guide rod (3d), described guide rod (3d) is through pilot hole (3b4), described Returnning spring (3e) is sleeved on guide rod (3d), described Returnning spring (3e) front end is resisted against on U-shaped support (3b3), and the rear end of described Returnning spring (3e) is resisted against on bonnet (3c); Described guide rod (3d) front end outer side mask limited location groove (3d1), snap in spacing card (3f) in described restraining groove (3d1), described spacing card (3f) can be resisted against on the front-end face of U-shaped support (3b3).
7. automatic safety gas valve according to claim 1, it is characterized in that, described fixing frame (3g) is in the form of annular discs and be fixedly connected with screw (3j), described screw (3j) passes fixing frame (3g) forward vertically and is formed and is threaded, and has spring pad (3i) between described screw (3j) and fixing frame (3g); The stud of described screw (3j) is set with described temperature control spring (3h).
8. automatic safety gas valve according to claim 6, it is characterized in that, the front-end face of described valve core housing (3a) is provided with annular recess one (3a1), the chassis (3b1) of described air valve frame (3b) is fitted in annular recess one (3a1); The ear end face of described valve core housing (3a) is provided with annular recess two (3a2), described fixing frame (3g) is fitted in annular recess two (3a2).
9. automatic safety gas valve according to claim 4, it is characterized in that, the front inner wall of described rear valve pocket (4) is provided with annular shoulder (4a), have seal ring one (7) between described fixing frame (3g) and annular shoulder (4a), the front-end and back-end of described seal ring one (7) are resisted against on fixing frame (3g) and annular shoulder (4a) respectively.
10. automatic safety gas valve according to claim 4, is characterized in that, the rear end of described rear valve pocket (4) is connected with reducer union (8).
11. automatic safety gas valves according to claim 10, it is characterized in that, the outside middle portion of described reducer union (8) being provided with cross section is orthohexagonal clamping part (8a), formed and be threaded in the rear end that the front end of described reducer union (8) is inserted into rear valve pocket (4), the rear end outer side surface of described reducer union (8) is provided with standard thread.
12. automatic safety gas valves according to claim 10, it is characterized in that, the rear end of described reducer union (8) is connected with pipe joint (9), the outer wall of described pipe joint (9) is provided with annular projection (9a), described annular projection (9a) is socketed with tightening nuts (10), between described tightening nuts (10) and pipe joint (9) rear end, is provided with elastic collar (11).
13. automatic safety gas valves according to claim 4, is characterized in that, are connected with ball valve (4b) in described rear valve pocket (4).
14. automatic safety gas valves according to claim 5, it is characterized in that, described pad (5) comprises 4 at circumferentially equally distributed arc plate (5a), the external arc limit of 4 described arc plates (5a) is circumferentially same, the Inner arc limit of 4 described arc plates (5a) is connected to the strip-shaped blade (5b) of strip, and 4 described strip-shaped blade (5b) are interconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112951.7A CN105546168A (en) | 2016-02-29 | 2016-02-29 | Automatic gas safety valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112951.7A CN105546168A (en) | 2016-02-29 | 2016-02-29 | Automatic gas safety valve |
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| CN105546168A true CN105546168A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610112951.7A Pending CN105546168A (en) | 2016-02-29 | 2016-02-29 | Automatic gas safety valve |
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| CN106267629A (en) * | 2016-08-15 | 2017-01-04 | 南通凌凌环保科技有限公司 | A kind of spark arrester |
| CN106951007A (en) * | 2017-03-01 | 2017-07-14 | 慈溪市奔科巨才五金配件有限责任公司 | A kind of gas pressure regulator, governor |
| CN107795776A (en) * | 2017-10-19 | 2018-03-13 | 创尔特热能科技(中山)有限公司 | Fuel connector with ultra-high temperature protection |
| CN108194307A (en) * | 2018-02-11 | 2018-06-22 | 泓道（上海）科技有限公司 | Piston type air compressor |
| CN110030413A (en) * | 2019-04-28 | 2019-07-19 | 宁波杰克龙精工有限公司 | A kind of integral type high temperature cutting fuel gas ball valve |
| CN114193519A (en) * | 2021-12-02 | 2022-03-18 | 宁波美志工具有限公司 | Safety knife |
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Application publication date: 20160504 |