CN209278569U

CN209278569U - A kind of mechanical pipe gas self-closing valve

Info

Publication number: CN209278569U
Application number: CN201821645121.1U
Authority: CN
Inventors: 李仲伦
Original assignee: 李仲伦
Current assignee: Shanghai lianzihuan valve equipment Co., Ltd
Priority date: 2018-10-10
Filing date: 2018-10-10
Publication date: 2019-08-20
Anticipated expiration: 2028-10-10

Abstract

A kind of mechanical pipe gas self-closing valve, there is setting in ball valve cavity top end and is connected with being arranged in the intracorporal ball valve of ball valve chamber, make the manual knob mechanism of ball valve cavity on and off for controlling ball valve rotation, the air inlet hickey of ball valve cavity inlet end, it is additionally provided with automatic control device, automatic control device has the control cavity for the air outlet side for being integrally formed in ball valve cavity, the integrally formed gas outlet with control cavity, channel switch mechanism is provided at gas passage at control cavity and ball valve cavity integrally connected, touching mechanism is provided in control chamber body, the upper end of control cavity is provided with the manual control mechanism for controlling touching mechanism, it controls and is provided with epithelium at the upper opening of cavity, it is perforative above and below the center of epithelium to be provided with pull rod, the upper end of pull rod above epithelium connects manual control mechanism, it is located at The bottom end connection touching mechanism of pull rod below epithelium.The utility model can efficiently solve the problems, such as various gas leakages.

Description

A kind of mechanical pipe gas self-closing valve

Technical field

The utility model relates to a kind of safety valves for gas.It can prevent more particularly to one kind because of overpressure of gas, under-voltage, broken The mechanical pipe gas self-closing valve that damage leakage is automatically shut down.

Background technique

Since current governmental is in renovating environment pollution problem energetically, strongly expand popularization industry and domestic fuel Carry out coal and change gas engineering because combustion gas is flammable explosive gas, government in order to ensure formulated safely with gas relevant regulation with Precautionary measures, so the engineers and technicians of the industry propose various solution technical solutions.

The manufacturer of each pipe gas self-closing valve currently on the market, substantially using permanent magnet as automatic control Power has highlighted the invariable the suction-combining force of permanent magnet in actual use, defines the range of working condition normal use, institute Gas source can be automatically cut off when air pressure drops to 0.8KPa when with gas peak, the illusion generally stopped the supple of gas or steam is caused, gives gas user Inconvenience in the majority is caused with gas company, since this kind design is not suitable with the changeable working condition variation of gas transmission and distribution, it is naughty just to face The certainty eliminated.To solve this problem it is necessary to weed out the old and bring forth the new, drawback is overcome to change design scheme.

Chinese utility model patent ZL 2015207576467.9 gives a kind of pipe gas self-closing valve, in main valve body It is provided with epithelium in the upper port in gas storage storehouse, epithelium moves up and down with the air pressure change in gas storage storehouse to drive to be arranged in gas storage storehouse Shifting block, shifting block do flip-flop movement in the range of restriction, and the valve plate in control bound body inlet channel axially moves.Work as gas Keep aeration status when balance, when superpressure sets reversion upwards ahead and is detached from valve plate, and valve plate is under the action of the spring and in inlet channel Sealing face contact block blast tube.When air pressure air pressure is less than standard limitation in gas storage storehouse；Shifting block downwardly turns over disengaging valve plate, Valve plate blocks blast tube with the sealing face contact in inlet channel under the action of the spring.When working condition occurs, superpressure is owed Gas source can be automatically cut off when pressure, damaged leakage combustion gas.Because disadvantage is that not having manually-operated gate function, and lacking quasi- The really stability of regulation air pressure and air-flow.Another 201720173658.1 pipe gas self-closing valve of utility model patent ZL, it is main The Technology design wanted is the normally closed valve plate of inlet channel setting in main valve body, the normally opened valve plate of setting in outlet passageway, in gas storage storehouse Upper port be provided with epithelium, upper cover, the pull rod one end told is back taper cylinder, one end of pull rod pass through epithelium pallet with Suit control spring is then passed through the centre bore of upper cover after nut fastening and limit pull-button is screwed togather with interior pull-button, forms a superpressure, owes The critical back taper cylinder with pull rod of the guide rod of pressure control device, the normally closed valve plate told and long valve opening, limits when pulling up The back taper cylinder of pull rod opens normally closed valve plate conducting gas source when the pull-button of position, adjusts control pressure change by epithelium and control spring and protects Combustion gas on state is held, when pressure continues to rise over range, pull rod is expanded with epithelium, control spring retraction increases, and is drawn The valve rod that the back taper cylinder of bar squeezes normally opened valve plate pushes normally opened valve plate to seal face closure outlet passageway realization excess pressure cutout Gas source, when air pressure is lower than rated range in gas storage storehouse, epithelium retraction control spring opens pull rod and simultaneously declines, the back taper of pull rod The guide rod that the cylinder conical surface is detached from normally closed valve plate realizes under-voltage closing.Such design is solved to be lacked using what permanent magnet can not regulate and control It falls into, but still there are problems that storage high pressure in non-cutting gas storage storehouse, it is therefore desirable to be further improved, is perfect, optimization, make it Gas source can be thoroughly cut off, one kind is designed and is more applicable for indoor fuel gas safety channel gas self-closing valve.Due to current governmental In renovating environment pollution problem energetically, therefore, strongly expands popularization industry with domestic fuel progress coal and change gas engineering, because of combustion Gas is flammable explosive gas, and government has formulated safely relevant regulation and precautionary measures with gas to ensure, so the industry Engineers and technicians propose various solution technical solutions.

Summary of the invention

Technical problem to be solved by the utility model is to provide a kind of multiple functional, more safe and reliable, durable, and It is linked with fuel gas ball valve and is integrated manual, automatic, the mechanical pipe gas self-closing valve with a variety of automatic protection functions, this Utility model thoroughly solves the problems, such as gas pipeline superpressure, under-voltage, damaged leakage combustion gas.

The technical scheme adopted by the utility model is a kind of mechanical pipe gas self-closing valve, includes ball valve, it is described Ball valve includes ball valve cavity, setting in the intracorporal ball valve of ball valve chamber, setting the ball valve cavity top end and be connected with ball valve, Make the manual knob mechanism of ball valve cavity on and off for the rotation by control ball valve, and is connected to the ball valve The air inlet hickey of cavity inlet end is provided in the air outlet side of the ball valve cavity with superpressure, it is under-voltage, overcurrent from Dynamic control device, the automatic control device includes the control cavity for being integrally formed in the air outlet side of the ball valve cavity, The control cavity is formed with the gas outlet for connecting outer combustion gas hose, the control far from that side of ball valve cavity The upper end of cavity processed is formed with upper opening, and setting is useful at the gas passage at the control cavity and ball valve cavity integrally connected Lead under ball valve on state in being provided in the channel switch mechanism for opening and closing the gas passage, the control chamber body The touching mechanism for the opening and closing for moving up and down trigger port switching mechanism is crossed, the upper end setting of the control cavity is useful It is provided at the manual control mechanism that control touching mechanism moves up and down, the upper opening of the control cavity for closing control Cavity and the epithelium that can be heaved or collapse under the intracorporal gas driven of control chamber, it is perforative above and below the center of the epithelium to set It is equipped with pull rod, the upper end of the pull rod above epithelium connects the manual control mechanism, the pull rod below epithelium Bottom end connects the touching mechanism.

The channel switch mechanism includes: being integrally formed in the gas of the control cavity and ball valve cavity junction Channel goes out the ring wall of gas side, and the mistake for the combustion gas of ball valve cavity to be sent into control cavity is formed on the ring wall Stomata is provided with the air inlet for opening or closing the air passing hole by moving horizontally at the air passing hole of the ring wall Control valve, positioned at ring wall close to control cavity side be provided with guiding trestle, be formed on the guiding trestle with it is described Air passing hole is corresponding to be used to support air intake control valve while moving horizontally the guiding being oriented to the air intake control valve Hole, the side that the air intake control valve is located at ball valve cavity are provided with air inlet control spring, and the air inlet control spring is to pass through The spring support that the ball valve cavity outlet side is arranged in is connected on the air intake control valve.

The pull rod includes main body, is formed in the lower spiral shell for being used to connect the touching mechanism of the lower body Line is integrally formed on the body and is located at the disk of the lower threaded upper end, is formed on the body and is located at described The middle screw thread for being threadedly coupled with the epithelium of disk upper end, and it is formed in being used for and the hand for the main body upper end The connected upper screw thread of dynamic control mechanism.

The touching mechanism includes to be fixed at the intracorporal middle control bracket of the control chamber, on the middle control bracket Under lead to passing through and be formed with guide channel, the first guide groove and the are respectively formed on two symmetrical side walls of the middle control bracket Two guide grooves, the Opening length of first guide groove are greater than the Opening length of second guide groove, in the guide channel It is provided with the starting bracket of П shape structure, the upper end of the starting bracket is connect with the lower screw thread of the pull rod, described to open The opening of dynamic bracket two sides is correspondingly arranged with the first guide groove of the middle control bracket and the second guide groove, in the starting bracket Be provided with by very heavy axis it is very heavy, the very heavy both ends stretch out respectively it is described starting bracket two sides opening and middle control bracket The first guide groove and the second guide groove, wherein be located at the first guide groove in that one end corresponding channel switching mechanism in air inlet Control valve setting touches air intake control valve and opens in channel switch mechanism when for moving up and down under the drive for starting bracket Air passing hole, it is described it is very heavy in be provided with the torsion spring covered on the very heavy axis, when the very heavy axis it is middle control bracket effect Under after rotation, the torsion spring is for making very heavy reset.

The middle control bracket is respectively set on two symmetrical sides of adjacent first guide groove and the second guide groove It is outwardly convex go out lug, be formed with pilot hole on the lug, be provided in the control chamber body and the middle control bracket Two lugs are corresponding to be used to support the middle locating shoulder for controlling bracket, is formed with and the lug on the locating shoulder On the corresponding screw hole of pilot hole, the lug is fixed by screws on the locating shoulder.

The starting bracket includes П shape bracket, and the cylindrical body of the П shape cantilever tip is arranged in, is axially formed It is right on the intracorporal internal screw thread for being threadedly coupled with the pull rod of the cylinder, two sides of the П shape bracket What is claimed is respectively formed with the axis hole for being used to support very heavy axis, is provided with and is used on the inside of the side bottom edge of the П shape bracket Second end of the limit plate of the first end of support torsion spring, the torsion spring is supported on very heavy.

It is described it is very heavy include both ends stretch out respectively the starting bracket two sides opening and middle control bracket first The hollow very heavy ontology of guide groove and the second guide groove, the very heavy ontology stretch out the first guide groove and it is corresponding described into One end of gas control valve is formed with the oblique cambered surface for touching the air intake control valve, and the very heavy ontology is closing on the second guiding The opening that can stretch out and support the second end of the torsion spring, two sides of the very heavy ontology are formed on the inside of slot The upper through hole being formed with for running through the very heavy axis corresponding with the axis hole on starting bracket respectively.

The manual control mechanism includes the pallet for covering on the pull rod and being located above the epithelium, and described The middle screw thread of pull rod connects and is located at the nut for being used for location tray above the pallet, and lower thread is connected to the drawing Interior pull-button on the upper screw thread of bar, lower port is connected in the upper opening of the control cavity, upper end muzzle is in the interior pull-button Upper cover on periphery, and cover and be used to drive by interior pull-button on the upper port periphery of the upper cover and on interior pull-button periphery Pull rod promotes the limit pull-button of touching mechanism, and upper spring is cased on the outside of the nut, and the upper end of the upper spring withstands on described The bottom end of interior pull-button, the lower end of the upper spring withstand on the upper surface of described pallet, wherein when the pull rod is in propradation When, the epithelium sticks on the upper surface of the disk of pull rod under the drive of pallet and nut.

The upper port of the control cavity is formed with a ring annular groove, and a circle energy is formed on the outer periphery of the epithelium The chimb being enough embedded in the annular groove of the control cavity, the centre bore for being formed in the epithelium center are tightly placed in the drawing On bar.

The upper cover includes can be by the middle part of pull rod and the nut being connected on the pull rod and spring and support The rounded cap body that disk is accommodated in the inner, the rounded cap body lower port have cap edge to the formation that periphery level is protruded, and the cap edge is pressed in institute It states on the upper port side of control cavity for positioning the chimb for the epithelium being embedded in the annular groove of control cavity upper port, institute State the outer periphery on cap edge downward vertically be formed with sealing edge, the sealing edge covers the upper port in the control cavity On, the top of the rounded cap body is formed with opening, and the opening is protruding upward to be provided with for covering in the interior pull-button Outside and the cylindrical structure being located on the inside of the limit pull-button, the formation that the top of institute's cylindrical structure outwardly protrudes has for limiting The limit pull-button deviates from the position-limited edge of cylindrical structure in upper mention.

The limit pull-button includes ring body, if being along the circumferential direction formed at equal intervals in the ring body Dry convex goes out for the barb with the position-limited edge phase hook at the upper cover top ports, between barb described in every two all It is formed with the separate slot that can make the barb that there is elastic space.

There is independent function mutually to close again for a kind of mechanical pipe gas self-closing valve of the utility model, each mechanism Connection, the division of labor are clear, therefore more safe and reliable.The utility model has the advantage that

1, the utility model is provided in the outlet side of ordinary ball valve has superpressure, under-voltage, overcurrent automatic controls, Efficiently solve the problems, such as various gas leakages, especially；When stopping the supple of gas or steam because of gas pipeline maintenance or other reasons, it can be automatically closed Gas source, because being not turned off the problem of burnt gas valve leakage combustion gas causes disaster accident when preventing from restoring to supply.

2, manual ball valve and automatic control device in the utility model, although being separately positioned on ball valve cavity and control cavity On, but ball valve cavity and control cavity are the whole valve arrangements that integrally connected is formed, and interrelated, are being fired to eliminate The hidden danger of Mulit-point Connection in feed channel, more securely and reliably.

Detailed description of the invention

Fig. 1 is a kind of external structure schematic diagram of mechanical pipe gas self-closing valve of the utility model；

Fig. 2 is a kind of schematic diagram of internal structure of mechanical pipe gas self-closing valve of the utility model；

Fig. 3 is a kind of decomposition texture schematic diagram of mechanical pipe gas self-closing valve of the utility model；

Fig. 4 is the ball valve cavity of integrally connected in the utility model and the schematic diagram of internal structure of control cavity；

The overlooking structure diagram of the ball valve cavity of integrally connected and control cavity in Fig. 5 the utility model；

Fig. 6 is the structural schematic diagram of air intake control valve in the utility model；

Fig. 7 is the structural schematic diagram of pull rod in the utility model；

Fig. 8 is the structural schematic diagram for starting bracket in the utility model；

Fig. 9 is the schematic cross-sectional view for starting bracket in the utility model；

Figure 10 is the structural schematic diagram of middle control bracket in the utility model；

Figure 11 is structural schematic diagram very heavy in the utility model；

Figure 12 is the structural schematic diagram that spring is reversed in the utility model；

Figure 13 is the structural schematic diagram of epithelium in the utility model；

Figure 14 is the structural schematic diagram of upper cover in the utility model；

Figure 15 is the structural schematic diagram that pull-button is limited in the utility model；

Figure 16 is the schematic diagram of internal structure that pull-button is limited in the utility model；

Figure 17 is the overlooking structure diagram of interior pull-button in the utility model；

Figure 18 is that the section view of interior pull-button in the utility model is intended to；

Figure 19 is the structural schematic diagram of spring support in the utility model；

Figure 20 is the structural schematic diagram of pallet in the utility model.

In figure

1: ball valve cavity 2: middle control bracket

2-1: the 2-2: the first guide groove of guide channel

2-3: the second guide groove 2-4: lug

2-5: pilot hole 3: starting bracket

3-1: П shape bracket 3-2: cylindrical body

3-3: internal screw thread 3-4: axis hole

3-5: limit plate 4: very heavy

4-1: oblique cambered surface 4-2: through hole

4-3: opening 4-4: very heavy ontology

5: torsion the 5-1: the first end of spring

5-2: the second end 6: very heavy axis

7: pull rod 7-1: lower screw thread

7-2: disk 7-3: middle screw thread

7-4: upper screw thread 7-5: main body

8: epithelium 8-1: centre bore

8-2: chimb 9: pallet

10: nut 11: upper spring

12: upper cover 12-1: rounded cap body

12-2: cylindrical structure 12-3: position-limited edge

12-4: sealing edge 12-5: cap edge

13: limit pull-button 13-1: ring body

13-2: separate slot 13-3: barb

14: interior 14-1: ten pilot trench of pull-button

14-2: cylindrical body 14-3: internal screw thread

14-4: top cap 15: air intake control valve

15-1: guide rod 15-2: rubber valve plate

15-3: rear axle 16: air inlet controls spring

17: spring support 17-1: support ring

17-2: support spoke 17-3: central through hole

18: ball valve 19: gasket

20: air inlet hickey 21: Air Filter

22: hole circlip 23: valve rod

24:O shape circle 25: knob

26: screw 27: gasket

28: control cavity 29: gas outlet

30: ring wall 30: air passing hole

32: guiding trestle 33: pilot hole

34: locating shoulder 35: screw hole

36: annular groove 37: gasket mounting groove

38: spring support mounting groove 39: gas passage

40: cylinder 41: positive stop lug boss

Specific embodiment

It is made specifically below with reference to a kind of mechanical pipe gas self-closing valve of the embodiment and attached drawing to the utility model It is bright.

As shown in Figure 1, Figure 2, Figure 3 shows, a kind of mechanical pipe gas self-closing valve of the utility model, includes ball valve, institute Stating ball valve includes ball valve cavity 1, the ball valve 18 in ball valve cavity 1 is arranged in, setting is in 1 top of ball valve cavity and and ball Valve 18 is connected, for the manual knob mechanism rotated to make 1 on and off of ball valve cavity by control ball valve 18, Yi Jilian The air inlet hickey 20 in 1 inlet end of ball valve cavity is connect, opens or closes valve with either manually or by ball valve 18.Described The air outlet side of ball valve cavity 1 is provided with superpressure, under-voltage, overcurrent automatic control device, the automatic control device packet Include the control cavity 28 for being integrally formed in the air outlet side of the ball valve cavity 1, the control cavity 28 is far from ball valve cavity 1 That side be formed with the gas outlet 29 for connecting outer combustion gas hose, the upper end of the control cavity 28 is formed with It is open, is provided at the gas passage 39 at the control cavity 28 and 1 integrally connected of ball valve cavity for opening and closing institute The channel switch mechanism of gas passage 39 is stated, is provided in the control cavity 28 under ball valve on state by moving up and down Come the touching mechanism of the opening and closing of trigger port switching mechanism, the upper end of the control cavity 28 is provided with for controlling touching The manual control mechanism that mechanism moves up and down is touched, is provided at the upper opening of the control cavity 28 for closing control cavity 28 and can under the gas driven in control cavity 28 epithelium 8 that heave or collapse, it is perforative above and below the center of the epithelium 8 It is provided with pull rod 7, the upper end of the pull rod 7 above epithelium 8 connects the manual control mechanism, below epithelium 8 The bottom end of pull rod 7 connects the touching mechanism.

As shown in Fig. 2, Fig. 3, Fig. 5, the knob 25 of 1 upper end of ball valve cavity is fixed with screw 26.Gasket 19 fills In the gasket mounting groove for fitting over 1 air inlet side of ball valve cavity, gasket 27 is assemblied in the gasket installation that ball valve cavity 1 goes out gas side In slot 37, ball valve 18 is assemblied in ball valve cavity 1.After assembling gasket 19, Air Filter 21 and hole circlip 22, by air inlet screw thread The external screw thread of interface 20 and the internal screw-thread screw of ball valve cavity 1 are fixed, and 1 upper end of ball valve cavity is used to connect manual rotation The side of the cylinder 40 of button mechanism is provided with knob 25 of the positive stop lug boss 41 in limit manual Knob mechanisms and does 90 ° of rotations Movement.

As shown in Figure 2, Figure 4 shows, the channel switch mechanism includes: being integrally formed in the control cavity 28 and ball valve The gas passage 39 of 1 junction of cavity goes out the ring wall 30 of gas side, is formed on the ring wall 30 for by ball valve chamber The air passing hole 31 of control cavity 28 is sent into the combustion gas of body 1, is provided at the air passing hole 31 of the ring wall 30 for passing through water Translation is moved to open or close the air intake control valve 15 of the air passing hole 31, is located at ring wall 30 close to control 28 side of cavity It is provided with guiding trestle 32, is formed on the guiding trestle 32 and corresponding with the air passing hole 31 is used to support air inlet control Valve 15, simultaneously to the pilot hole 33 being oriented to that moves horizontally of the air intake control valve 15, the air intake control valve 15 is located at The side of ball valve cavity 1 is provided with air inlet control spring 16, and the air inlet control spring 16 is by being arranged in the ball valve chamber The spring support 17 of 1 outlet side of body is connected on the air intake control valve 15.As shown in fig. 6, the air intake control valve 15 wraps The rubber valve plate 15-2 for including the air passing hole 31 for blocking the ring wall 30 is connected to the one of the rubber valve plate 15-2 The guide rod 15-1 of center side, and it is connected to the rear axle 15-3 at the another side the rubber valve plate 15-2 center, wherein institute The guide rod 15-1 stated sequentially passes through the pilot hole 33 on the air passing hole 31 and guiding trestle 32 of the ring wall 30, and is touching Touch under the touching of mechanism and the rubber valve plate 15-2 driven to open or close the air passing hole 31, be cased on the rear axle 15-3 into Gas control spring 16.

As shown in Fig. 2, Fig. 7, the pull rod 7 includes main body 7-5, be formed in the lower end the main body 7-5 for connecting The lower screw thread 7-1 for meeting the touching mechanism, is integrally formed on the main body 7-5 and is located at the circle of the upper end lower screw thread 7-1 Disk 7-2 is formed on the main body 7-5 and is located at the middle spiral shell for being threadedly coupled with the epithelium 8 of the upper end the disk 7-2 Line 7-3, and it is formed in the upper screw thread 7-4 for being connected with the manual control mechanism of the upper end the main body 7-5.

As shown in Fig. 2, Fig. 7~Figure 12, the touching mechanism includes to be fixed in the control cavity 28 Middle control bracket 2, middle about the 2 control bracket leads to passing through is formed with guide channel 2-1, and two of the middle control bracket 2 are symmetrical The first guide groove 2-2 and the second guide groove 2-3 are respectively formed on side wall, the Opening length of the first guide groove 2-2 is greater than The Opening length of the second guide groove 2-3 is provided with the starting bracket 3 of П shape structure in the guide channel 2-1, described to open The upper end of dynamic bracket 3 is threadedly coupled with the lower screw thread 7-1 of the pull rod 7, the opening for starting 3 two sides of bracket with it is described in The the first guide groove 2-2 and the second guide groove 2-3 of control bracket 2 are correspondingly arranged, and are arranged in the starting bracket 3 by very heavy axis 6 Have very heavy 4, the opening of starting 3 two sides of bracket and the first guiding of middle control bracket 2 are stretched out in very heavy 4 both ends respectively Slot 2-2 and the second guide groove 2-3, wherein the air inlet in that one end corresponding channel switching mechanism being located in the first guide groove 2-2 Control valve 15 is arranged, and air intake control valve 15 is touched when for moving up and down under the drive for starting bracket 3 and opens channel switch machine Air passing hole 31 in structure is provided with the torsion spring 5 covered on the very heavy axis 6 in described very heavy 4, when the very heavy axis 6 is in Under the action of control bracket 2 after rotation, the torsion spring 5 is resetted for making very heavy 4.

As shown in Fig. 2, Fig. 5, Figure 10, the middle control bracket 2 is in adjacent first guide groove 2-2 and the second guide groove 2-3 Two symmetrical sides on be respectively arranged on the lug 2-4, the lug 2-4 outwardly protruded and be formed with pilot hole 2-5, institute It states to be provided in control cavity 28 and corresponding with middle control two lug 2-4 of bracket 2 is used to support the middle control bracket 2 Locating shoulder 34, be formed with screw hole 35 corresponding with the pilot hole 2-5 on the lug 2-4 on the locating shoulder 34, The lug 2-4 is fixed by screws on the locating shoulder 34.

As shown in Fig. 2, Fig. 8, the starting bracket 3 includes П shape bracket 3-1, is arranged in the П shape bracket 3-1 The cylindrical body 3-2 on top, the interior spiral shell for being threadedly coupled with the pull rod 7 being axially formed in the cylindrical body 3-2 Line 3-3 is symmetrically respectively formed with the axis hole 3-4 for being used to support very heavy axis 6, institute on two sides of the П shape bracket 3-1 State the limit plate 3- that the first end 5-1 for being used to support torsion spring 5 is provided on the inside of the side bottom edge of П shape bracket 3-1 5, the second end 5-2 of the torsion spring 5 is supported on very heavy 4.

As shown in Fig. 2, Figure 11, described very heavy 4 include both ends stretch out respectively it is described starting 3 two sides of bracket opening with And the hollow very heavy ontology 4-4, the very heavy ontology 4-4 of the first guide groove 2-2 and the second guide groove 2-3 of middle control bracket 2 It is formed in the one end for stretching out the first guide groove 2-2 and the corresponding air intake control valve 15 for touching the air intake control valve 15 oblique cambered surface 4-1, the very heavy ontology 4-4 can be stretched out and support institute closing on on the inside of the second guide groove 2-3 to be formed with The opening 4-3 for stating the second end 5-2 of torsion spring 5, on two sides of the very heavy ontology 4-4 respectively and on starting bracket 3 Axis hole 3-4 it is corresponding be formed with for run through the very heavy axis 6 through hole 4-2.

As shown in Fig. 2, the manual control mechanism includes to cover on the pull rod 7 and be located above the epithelium 8 Pallet 9, the nut that the pallet 9 is used for location tray 9 above is threadedly coupled and is located at the middle screw thread 7-3 of the pull rod 7 10, lower thread is connected to the interior pull-button 14 on the upper screw thread 7-4 of the pull rod 7, and lower port is connected to the control cavity 28 Upper opening on, upper cover 12 of the upper end muzzle on interior 14 periphery of pull-button, and cover outside the upper port of the upper cover 12 The limit pull-button 13 for being used to drive pull rod 7 to promote touching mechanism by interior pull-button 14 in Zhou Shanghe on 14 periphery of pull-button, it is described The outside of nut 10 is cased with upper spring 11, and the upper end of the upper spring 11 withstands on the bottom end of the interior pull-button 14, the upper spring 11 lower end withstands on the upper surface of described pallet 9, wherein when the pull rod 7 is in propradation, the epithelium 8 is being held in the palm The upper surface of the disk 7-2 of pull rod 7 is sticked under the drive of disk 9 and nut 10.

As shown in Fig. 2, Fig. 4, Fig. 5, Figure 13, the upper port of the control cavity 28 is formed with a ring annular groove 36, institute It states and is formed with the chimb 8-2 that a circle can be embedded in the annular groove 36 of the control cavity 28 on the outer periphery of epithelium 8, shape It is tightly placed on the pull rod 7 at the centre bore 8-1 at 8 center of epithelium.

As shown in Fig. 2, Figure 14, the upper cover 12 includes that the middle part of pull rod 7 and can will be connected on the pull rod 7 Nut 10 and the rounded cap body 12-1 that is accommodated in the inner of spring 11 and pallet 9, the rounded cap body 12-1 lower port is to periphery level The formation of protrusion has cap along 12-5, and the cap is embedded in along the upper port side that 12-5 is pressed in the control cavity 28 for positioning Control the chimb 8-2 of the epithelium 8 in the annular groove 36 of 28 upper port of cavity, the cap along the outer periphery of 12-5 downward vertically It is formed with sealing edge 12-4, the sealing edge 12-4 covers in the upper port of the control cavity 28, the sealing edge The effect of 12-4 is: for compressing the upper port of epithelium 8, sealing control cavity 28 and upper cover 12 being made to be fixedly connected on the control The top of the upper port of cavity 28 processed, the rounded cap body 12-1 is formed with opening, and opening setting protruding upward is useful In the outside covered in the interior pull-button 14 and the cylindrical structure 12-2, institute cylindrical structure 12-2 that are located on the inside of the limit pull-button 13 The formation that outwardly protrudes of top have the position-limited edge for deviating from cylindrical structure 12-2 in upper mention for limiting the limit pull-button 13 12-3。

As shown in Fig. 2, Figure 15, Figure 16, the limit pull-button 13 includes ring body 13-1, the ring body Along the circumferential direction be formed at equal intervals in 13-1 several convexes go out for the limit at 12 top ports of upper cover All being formed between the barb 13-3 of side 12-3 phase hook, barb 13-3 described in every two can be such that the barb 13-3 has The separate slot 13-2 of elastic space.

As shown in Fig. 2, Figure 17, Figure 18, the interior pull-button 14 includes the circle for being inserted into 12 top of upper cover Have cylindrical body 14-2 in barrel structure 12-2, be integrally formed in the top the cylindrical body 14-2 for riding over the limit pull-button 13 The top cap 14-4, the cylindrical body 14-2 of upper end is formed with along axis for connecting with the upper screw thread 7-4 of 7 upper end of pull rod Internal screw thread 14-3, the upper surface of the top cap 14-4 are provided centrally with for passing through screwdriver for interior pull-button 14 and pull rod 7 The close-connected ten pilot trench 14-1 of upper screw thread 7-4 at end.

As shown in Fig. 4, Figure 19, the spring support 17 is arranged in the control cavity 28 and ball valve cavity 1 one In the spring support mounting groove 38 of the inlet end of the gas passage 39 of body junction, includes support ring 17-1, pass through supporting spokes 17-2 is formed in the central through hole 17-3 at the center support ring 17-1, opens gas passage when the air intake control valve 15 is in When 39 state, the rear axle 15-3 of air intake control valve 15 is inserted into the central through hole 17-3.

As shown in Figure 1, Figure 2, Figure 3 shows, a kind of working principle of mechanical pipe gas self-closing valve of the utility model is, when After opening ball valve 18 by knob 25, start automatic control device, including pulls up limit pull-button 13 and drive interior pull-button 14, pull rod 7, start that bracket 3, very heavy 4, torsion spring 5, very heavy axis 6 is synchronous rises, upper spring 11 bounces back, when limit draws knob 13 to rise to When the position-limited edge 12-3 of the cylindrical structure 12-2 on 12 top of lid, position-limited edge 12-3 blocks barb 13-3, draws to limit limit Button 13 continues up.Very heavy 4 oblique cambered surface 4-1 pushes the guide rod 15-1 of air intake control valve plate 15 to axially move, The gas for being detached from the rubber valve plate 15-2 into air intake control valve 15 between the ball valve cavity 1 of integrally connected and control cavity 28 is logical Ring wall 30 at road 39, gas enter control cavity 28, and epithelium 8 increases to splash with air pressure and rise, offsets under the pressure of the gas The screen resilience of upper spring 11 keeps ventilation safety on the alert.

When control cavity 28 in gas pressure exceed rated pressure when, epithelium 8 continue to splash rise drive interior pull-button 14, pull rod 7, Starting bracket 3, very heavy 4, torsion spring 5, the synchronization of very heavy axis 6 rise again, when very heavy 4 that one end far from oblique cambered surface 4-1 are very heavy When tail 4-3 touches the upper end of the second guide groove 2-3 of middle control bracket 2, the second upper end guide groove 2-3 stirs very heavy 4 and does up time Needle spinning movement, oblique cambered surface 4-1 are detached from the guide rod 15-1 of air intake control valve plate 15, and air intake control valve plate 15 controls bullet in air inlet With 30 closed amputation gas source of ring wall under the election of spring 16, gas pressure zero in cavity 28 is controlled, in pushing away for upper spring 11 The decline of lower touching mechanism is lifted, very heavy 4, which touch guide rod 15-1, continues to rotate clockwise and cross guide rod 15-1, is reversing spring Origin is arrived in convolution under the action of 5, and automatic control device is restored to stationary state, automatically cuts off gas source.

When there is gas hose breakage leakage, when exceeding specified gas supply flow in control cavity 28, control in cavity 28 Gas pressure reduces, interior pull-button 14, pull rod 7, starting bracket 3, very heavy 4, torsion spring 5, very heavy axis 6 under the election of upper spring 11 Synchronous decline, oblique cambered surface 4-1 are detached from the guide rod 15-1 of air intake control valve plate 15, and air intake control valve plate 15 controls spring in air inlet With 30 closed amputation gas source of ring wall under 16 election, gas pressure zero in cavity 28 is controlled, automatic control device restores To stationary state, gas source is automatically cut off.

Under conditions of a kind of mechanical pipe gas self-closing valve of the utility model works normally, as long as pressing interior tension-torsion 14 can make automatic control device revert to the stationary state for closing gas source.

Specific example described in the utility model is only the illustration of the utility model.Belonging to the utility model Those skilled in the art various modifications or additions can be done to described specific example or using similar Mode substitutes, but not deviate from the spirit of the utility model or appended right defined in range.

Claims

1. a kind of mechanical pipe gas self-closing valve, includes ball valve, the ball valve includes ball valve cavity (1), is arranged in ball Ball valve (18) in valve chamber (1), setting is on ball valve cavity (1) top and is connected with ball valve (18), controls for passing through The rotation of ball valve (18) makes the manual knob mechanism of ball valve cavity (1) on and off, and is connected to the ball valve cavity (1) the air inlet hickey (20) of inlet end, which is characterized in that being provided in the air outlet side of the ball valve cavity (1) has Superpressure, under-voltage, overcurrent automatic control device, the automatic control device include to be integrally formed in the ball valve cavity (1) Air outlet side control cavity (28), it is described control cavity (28) far from ball valve cavity (1) that side be integrally formed it is useful Upper opening, the control chamber are formed in the upper end of the gas outlet (29) of connection outer combustion gas hose, control cavity (28) It is provided at gas passage (39) at body (28) and ball valve cavity (1) integrally connected for opening and closing the gas passage (39) channel switch mechanism, interior be provided with of the control cavity (28) are triggered under ball valve on state by moving up and down The upper end of the touching mechanism of the opening and closing of channel switch mechanism, control cavity (28) is provided with for controlling touching machine The manual control mechanism that structure moves up and down, it is described control cavity (28) upper opening at be provided with for close control cavity (28) And the epithelium (8) that can be heaved or collapse under the gas driven in control cavity (28), the center of the epithelium (8) are passed through up and down That wears is provided with pull rod (7), and the upper end for being located at the pull rod (7) of epithelium (8) above connects the manual control mechanism, is located at skin The bottom end of the pull rod (7) of film (8) below connects the touching mechanism.

2. a kind of mechanical pipe gas self-closing valve according to claim 1, which is characterized in that the channel switch machine Structure includes: the gas passage (39) for being integrally formed in described control cavity (28) and ball valve cavity (1) junction goes out gas side Ring wall (30) is formed on the ring wall (30) for control cavity (28) to be sent into the combustion gas of ball valve cavity (1) Air passing hole (31), be provided with for being opened or closed by moving horizontally at the air passing hole (31) of the ring wall (30) The air intake control valve (15) of the air passing hole (31) is located at ring wall (30) close to control cavity (28) side and is provided with guiding Bracket (32) is formed on the guiding trestle (32) and corresponding with the air passing hole (31) is used to support air intake control valve (15), the pilot hole (33) being oriented to, the air intake control valve are moved horizontally to the air intake control valve (15) simultaneously (15) side positioned at ball valve cavity (1) is provided with air inlet control spring (16), and air inlet control spring (16) is by setting The spring support (17) set in ball valve cavity (1) outlet side is connected on the air intake control valve (15).

3. a kind of mechanical pipe gas self-closing valve according to claim 1, which is characterized in that pull rod (7) packet Main body (7-5) has been included, the lower screw thread (7-1) for being used to connect the touching mechanism of the lower end the main body (7-5), one are formed in It is formed on the main body (7-5) and is located at the disk (7-2) of lower screw thread (7-1) upper end, is formed in the main body (7-5) The middle screw thread (7-3) for being threadedly coupled with the epithelium (8) that is upper and being located at the upper end the disk (7-2), and be formed in The upper screw thread (7-4) for being connected with the manual control mechanism of main body (7-5) upper end.

4. a kind of mechanical pipe gas self-closing valve according to claim 1, which is characterized in that the touching mechanism packet The middle control bracket (2) being fixed in control cavity (28) is included, the middle control bracket (2) is led to passing through up and down to be formed with Guide channel (2-1) is respectively formed with the first guide groove (2-2) and the on two symmetrical side walls of middle control bracket (2) Two guide grooves (2-3), the Opening length of first guide groove (2-2) are greater than the Opening length of second guide groove (2-3), The starting bracket (3) of П shape structure, the upper end of starting bracket (3) and the drawing are provided in the guide channel (2-1) The lower screw thread (7-1) of bar (7) is threadedly coupled, and the opening of described starting bracket (3) two sides is led with the first of middle control bracket (2) It is correspondingly arranged, is provided with by very heavy axis (6) in the starting bracket (3) very heavy to slot (2-2) and the second guide groove (2-3) (4), the opening of described starting bracket (3) two sides is stretched out at the both ends of very heavy (4) respectively and the first of middle control bracket (2) is led To slot (2-2) and the second guide groove (2-3), wherein being located at that one end corresponding channel switching mechanism in the first guide groove (2-2) In air intake control valve (15) setting, for start bracket (3) drive under move up and down when touch air intake control valve (15) The air passing hole (31) in channel switch mechanism is opened, is provided with the torsion spring covered on the very heavy axis (6) in very heavy (4) (5), after under the action of the very heavy axis (6) is in middle control bracket (2) around rotation, the torsion spring (5) is for making very heavy (4) It resets.

5. a kind of mechanical pipe gas self-closing valve according to claim 4, which is characterized in that the middle control bracket (2) it is respectively arranged with and outwardly protrudes on two symmetrical sides of adjacent first guide groove (2-2) and the second guide groove (2-3) Lug (2-4), be formed with pilot hole (2-5) on the lug (2-4), be provided in the control cavity (28) with it is described in The corresponding locating shoulder (34) for being used to support middle control bracket (2) of two lugs (2-4) of bracket (2) is controlled, it is described fixed Screw hole (35) corresponding with pilot hole (2-5) on the lug (2-4), the lug (2- are formed on position shoulder (34) 4) it is fixed by screws on the locating shoulder (34).

6. a kind of mechanical pipe gas self-closing valve according to claim 4, which is characterized in that the starting bracket (3) include П shape bracket (3-1), the cylindrical body (3-2) on П shape bracket (3-1) top is set, institute is axially formed at State the internal screw thread (3-3) for being threadedly coupled with the pull rod (7) in cylindrical body (3-2), the П shape bracket (3-1) Two sides on be symmetrically respectively formed with the axis hole (3-4) for being used to support very heavy axis (6), the П shape bracket (3-1) The limit plate (3-5) for being used to support first end (5-1) of torsion spring (5), institute are provided on the inside of the bottom edge of one side The second end (5-2) for stating torsion spring (5) is supported on very heavy (4).

7. a kind of mechanical pipe gas self-closing valve according to claim 4, which is characterized in that described very heavy (4) packet It includes both ends and stretches out the opening of described starting bracket (3) two sides and the first guide groove (2-2) and the of middle control bracket (2) respectively The hollow very heavy ontology (4-4) of two guide grooves (2-3), the very heavy ontology (4-4) are the first guide groove (2-2) and right in stretching One end of the air intake control valve (15) is answered to be formed with the oblique cambered surface (4-1) for touching the air intake control valve (15), institute Stating very heavy ontology (4-4) and being formed on closing on the inside the second guide groove (2-3) can stretch out and support torsion spring (5) The opening (4-3) of second end (5-2), on two sides of the very heavy ontology (4-4) respectively with the axis in starting bracket (3) Hole (3-4) is corresponding to be formed with for the through hole (4-2) through the very heavy axis (6).

8. a kind of mechanical pipe gas self-closing valve according to claim 1, which is characterized in that the manual control machine Structure includes to cover on the pull rod (7) and be located at the pallet (9) of the epithelium (8) above, the middle screw thread with the pull rod (7) (7-3) is threadedly coupled and is located at the nut (10) that the pallet (9) are used for location tray (9) above, and lower thread is connected to institute State the interior pull-button (14) on the upper screw thread (7-4) of pull rod (7), lower port is connected in the upper opening of control cavity (28), Upper cover (12) of the upper end muzzle on interior pull-button (14) periphery, and cover on the upper port periphery of the upper cover (12) and The limit pull-button (13) for being used to drive pull rod (7) to promote touching mechanism by interior pull-button (14) on interior pull-button (14) periphery, institute It states and is cased on the outside of nut (10) upper spring (11), the upper end of the upper spring (11) withstands on the bottom end of the interior pull-button (14), The lower end of the upper spring (11) withstands on the upper surface of described pallet (9), wherein when the pull rod (7) is in propradation, The epithelium (8) sticks on the upper surface of disk (7-2) of pull rod (7) under the drive of pallet (9) and nut (10).

9. a kind of mechanical pipe gas self-closing valve according to claim 8, which is characterized in that the control cavity (28) Upper port be formed with a ring annular groove (36), be formed on the outer periphery of the epithelium (8) circle can be embedded in it is described The chimb (8-2) in the annular groove (36) of cavity (28) is controlled, the centre bore (8-1) for being formed in the epithelium (8) center is tight It covers on the pull rod (7).

10. a kind of mechanical pipe gas self-closing valve according to claim 8, which is characterized in that the upper cover (12) Including can be by the middle part of pull rod (7) and the nut being connected on the pull rod (7) (10) and spring (11) and pallet (9) The rounded cap body (12-1) being accommodated in the inner, rounded cap body (12-1) lower port have cap along (12- to the formation that periphery level is protruded 5), the cap is embedded in control cavity (28) for positioning along the upper port side that (12-5) is pressed in control cavity (28) The chimb (8-2) of epithelium (8) in the annular groove (36) of port, one of the cap along the outer periphery of (12-5) downward vertically It is formed with sealing edge (12-4), the sealing edge (12-4) covers in the upper port of control cavity (28), the rounded cap body The top of (12-1) is formed with opening, and the opening is protruding upward to be provided with for covering in the outside of the interior pull-button (14) And it is located at the cylindrical structure (12-2) on the inside of limit pull-button (13), the shape that the top of institute's cylindrical structure (12-2) outwardly protrudes At the position-limited edge (12-3) having for limiting limit pull-button (13) abjection cylindrical structure (12-2) in upper propose.

11. a kind of mechanical pipe gas self-closing valve according to claim 8, which is characterized in that the limit pull-button (13) include ring body (13-1), be along the circumferential direction formed at equal intervals in the ring body (13-1) several to Evagination goes out for the barb (13-3) with position-limited edge (12-3) phase hook at the upper cover (12) top ports, described in every two The separate slot (13-2) that can make the barb (13-3) that there is elastic space is all formed between barb (13-3).