CN205937846U - Trip valve with simple union - Google Patents

Abstract

The utility model discloses a trip valve with simple union, including the valve port and the valve rod of sliding fit on the valve body that are used for feeding through fluid passage, the valve rod is connected with locking mechanism, is equipped with between valve rod and the valve body to be used for driving the first spring that the valve rod moved, and the valve rod front end is equipped with the valve clack to when locking mechanism was in the unblock state, the valve clack formed the shutoff to the fluid passage of valve port, valve rod front end spiral shell has closed the ball round pin, and the ball round pin is fixed on the valve rod through lock nut locking, and a spring coupling is between lock nut and valve body, the hemisphere nest that the valve clack passes through to form on the valve clack is connected with the bulb of ball round pin is partly, and the welding has the spherical cap on the valve clack, and hemisphere nest and another part of bulb of ball round pin of forming on this spherical cap are connected, and locking mechanism's locking power is provided by the second spring, and release mechanism power is provided by the diaphragm. The beneficial effects of the utility model are that, simple structure, cut off reliable, safe in utilization, long service life.

Description

There is the stop valve of simple articulation

Technical field

This utility model patent is related to a kind of stop valve, particularly a kind of simple articulation that has for fuel gas shutoff Stop valve.

Background technology

Stop valve is a kind of valve for blocking fluid in control section in fluid circuit, defeated in chemical industry, combustion gas Give and city gas supply in commonly used.The startup control of stop valve generally adopts Electromagnetic Control, cuts off type of drive bag Include driven by power, hydraulic pressure or air pressure driving etc..When inflammable and explosive environment or pumped (conveying) medium are flammable explosive gas, Electromagnetic Control Electrical equipment start and easily produce spark, there is disaster hidden-trouble.In addition, stop valve generally combines formation using valve rod with flap Valve element, existing combination valve core is in rigid structure, under the influence of the accuracy of manufacture, the perpendicularity of sealing valve port face and valve rod mobile axis Certainly exist certain error although can suitably be made up by soft seal pad, but sealing gasket unbalance stress can be caused, easily Sealing gasket local early damage phenomenon occurs.For this reason, it may be necessary to improve further.

Content of the invention

The purpose of this utility model is aiming at the deficiencies in the prior art, provides a kind of stop valve with simple loose joint, Its structure is simple, sealing gasket uniform force, cut-out is reliable, use safety, long service life.Further by the fluid of pumped (conveying) medium Pressure is as the driving power starting control, and cuts off the pure mechanic structure stop valve that power is provided by the spring of energy-storage travelling wave tube, Can effectively eliminate sealing gasket early damage and because driven by power mode exist electronic component spark produce link it is adaptable to inflammable easily Gas explosion body conveys, particularly city gas supply pipeline.

For achieving the above object, this utility model adopts the following technical scheme that.

A kind of stop valve with simple articulation, including for connecting the valve port of fluid passage and being slidably fitted in valve body On valve rod, valve rod is connected with lockable mechanism, is provided with the first spring for driving valve rod movement, valve rod between valve rod and valve body Front end is provided with flap, so that when lockable mechanism is in released state, flap forms closure to the fluid passage of valve port；Described valve rod Front end is screwed with ball pin, and ball pin is locked on valve rod by locking nut, described first spring be connected to locking nut with Between described valve body；The bulb part that described flap passes through the half ball-and-socket and ball pin being formed on flap is connected, and flap welds There is spherical cap, half ball-and-socket that this spherical cap is formed is connected with bulb another part of ball pin.

Using this utility model of preceding solution, valve rod and flap constitute the valve element of stop valve, and valve rod is led to flap Cross ball pin and spherical cap forms ball pivot and connects, after flap front end setting sealing gasket, sealing gasket uniform force, stress can be prevented effectively from The local early damage that skewness causes；In addition, there being valve rod to be connected with lockable mechanism, between valve rod and valve body, it is provided with the first bullet Spring, when lockable mechanism is in released state, valve rod is driven by the elastic force of the first spring and moves, thus the fluid to valve port Passage forms closure.Its cut-out closing power is constant, is not affected by Fluid pressure size, and structure is simple, cut-out is reliable.

Preferably, described spherical cap is made up of two lobes of circumference equal dividing, and spherical cap is formed the terminal pad fitted with flap end face. Two valve structures are easy to the bulb of ball pin is fastened in ball-and-socket, and terminal pad is used for improving fastness and the stability of welding.

Preferably, described lockable mechanism includes lock pin, and lock pin passes through to form valve to valve rod in the horizontal cannelure being inserted in valve rod The locking of door opening, lock pin is respectively provided on two sides with second spring and barrier film, and second spring and barrier film are respectively used to lock pin Locking and the mobile driving of unblock；Form diaphragm cavity, this diaphragm cavity is connected with described fluid passage between described barrier film and valve body.Lock The lock pin that locking mechanism passes through in the horizontal cannelure being inserted in valve rod forms the locking to valve rod movement, lock pin respectively by second spring with Barrier film drives valve rod locking and unblock；Form diaphragm cavity, this diaphragm cavity is connected with described fluid passage between barrier film and valve body.Cause This, when barrier film cavity fluid pressure is more than setting value, barrier film, by fluid forces displacement, overcomes the elastic force of second spring Make lock pin deviate from the cannelure of valve rod, reach the purpose that valve rod is unlocked and the fluid passage of valve port is closed.To realize to mesh The control of mark pipeline section upper fluid pressure, is particularly well-suited to chemical industry pipeline, poisonous and harmful fluid line, and inflammable and explosive The cutting-off controlling management of the pressure limit of gas pipeline., according to pipe fluid pressure, reliability is high, is not required to borrow for its cutting-off controlling Help other instruments instrument, less need driven by power control, eliminate electrical equipment and start the fire or quick-fried producing spark and bringing Fried potential safety hazard.

It is further preferred that described lock pin is circle；The cannelure side of described valve rod is formed with the conical shaft shoulder, lock pin The abutting state being in tangent with the described cone shaft shoulder forms the locking to valve rod.To facilitate manufacture, reduce manufacturing cost, and and When in the case that lock pin or/and valve rod rotate, all can reliably realize lock control.

It is further preferred that the described cone taper seat of the shaft shoulder and the angle α of valve rod axis are between 75 °～85 °. Frustoconical bevel angle parameter directly affects reliability and the unblock response speed of locking, and the bigger locking of this angle is more reliable, and angle is less, Unblock corresponding speed is faster, and therefore, rational frustoconical bevel angle needs according to lock pin and valve rod material, hardness, rough surface group etc. Condition carries out Theoretical Calculation and lot of experiment validation obtains.Therefore, select rational frustoconical bevel angle, both can ensure that acquisition was good Reliability and quick, quick unblock performance.

It is further preferred that described lock pin traverses in the middle part of tubular element, the middle part of tubular element is provided with for through institute Perforation is traversed in the bar shaped stating valve rod, and lock pin is connected with described valve rod by the part in tubular element pipe；Tubular element passes through The mating holes that the pipe outer wall of lock pin side is provided with described valve body forms sliding connection, and the endoporus of this section of pipeline section is formed with Interior step, the endoporus of this section of pipeline section installs described second spring, and interior step is abutted with one end of second spring, second spring The other end is connected on plug screw, and plug screw is screwed on described valve body；Tubular element is located at the far-end of lock pin opposite side with barrier film even Connect.Tubular element and the arrangement of valve rod formation decussation, its topology layout is compact, and stop valve overall volume is little, installs Take up room little it is adaptable to be laid in the narrow and small equipment of installation site or facility.

Preferably, it is fixedly connected with rigid dish type end liner in the middle part of described barrier film.Most of rigidity that formed of barrier film is tied Structure, is easy to for the deformation of flexible portion to be reliably converted into displacement, improves and control sensitivity.

Preferably, described valve rod forms closure by front end to the fluid passage of described valve port, and valve rod tail end exposes described valve External body, valve rod tail end is formed with free-hand handgrip.To cut off in pipeline fluid and to fix a breakdown, or Fluid pressure reduces Afterwards, free-hand pulling valve rod is up to by automatic locking.

The beneficial effects of the utility model are, structure is simple, cut-out is reliable, use safety, and long service life is particularly suitable Cutting-off controlling in city gas pipeline pressure limit.

Brief description

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

Fig. 2 is the A portion enlarged drawing in this utility model Fig. 1.

Specific embodiment

Below in conjunction with the accompanying drawings this utility model is further described, but therefore this utility model is not limited in institute Among the scope of embodiments stated.

Referring to Fig. 1, Fig. 2, a kind of stop valve with simple articulation, including for connecting fluid channel inlet end and going out The valve port 1 at mouth end and the valve rod 3 being slidably fitted on valve body 2, valve rod 3 front end ball pivot is connected with flap 13, and flap 13 is by front end Sealing gasket 17 closure is formed to the fluid passage of valve port 1, sealing gasket 17 passes through the back taper head card protruding out in the middle part of flap 13 end face It is combined on flap 13, valve rod 3 tail end exposes outside valve body 2, valve rod 3 tail end is formed with the free-hand handgrip 3b of cylinder capitiform, The free-hand handgrip 3b outer end of valve rod 3 is provided with the protective cover 11 being screwed on valve body 2；Valve rod 3 is connected with lockable mechanism, valve rod It is provided with the first spring 4, so that when lockable mechanism is in released state, the elastic force of the first spring 4 drives valve between 3 and valve body 2 Bar 3 is mobile, and forms closure to the fluid passage of valve port 1；Valve rod 3 front end is screwed with ball pin 14, and ball pin 14 passes through locking nut 15 are locked on valve rod 3, and described first spring 4 is connected between locking nut 15 and described valve body 2；Described flap 13 leads to Half ball-and-socket being formed is crossed on flap 13 be connected with a bulb part for ball pin 14, flap 13 is welded with spherical cap 16, this spherical cap 16 Half ball-and-socket of upper formation is connected with bulb another part of ball pin 14, and spherical cap 16 is formed by plate stamping, and passes through circumference equal dividing Two lobes compositions, spherical cap 16 forms terminal pad 16a fitted with flap 13 end face, spherical cap 16 is by terminal pad 16a and flap 13 welding.Lockable mechanism includes lock pin 5, and lock pin 5 passes through to form valve opening shape to valve rod 3 in the horizontal cannelure being inserted in valve rod 3 The locking of state, lock pin 5 is respectively provided on two sides with second spring 6 and barrier film 7, and second spring 6 and barrier film 7 are respectively used to the lock of lock pin 5 Only move and drive with unblock；Form diaphragm cavity between barrier film 7 and valve body 2, in the middle part of barrier film 7, be fixedly connected with rigid dish type end liner 12, this diaphragm cavity is connected by the port of export of Media Interface Connector 2a and described fluid passage, is adjusted with arranging in the exit of valve port 1 passage After depressor, the Fluid pressure that through-flow body leads to the port of export is the pressure after pressure regulation, when the pressure after this pressure regulation exceedes setting value, cuts The valve port 1 Channel front end port that disconnected valve is blocked by valve rod 3, thus cut off the fluid shutoff at outlet flow channels end.

Wherein, lock pin 5 is circle；The cannelure side of valve rod 3 is formed with conical shaft shoulder 3a, lock pin 5 and conical shaft Shoulder 3a forms the locking to valve rod 3 in tangent abutting state；The taper seat of conical shaft shoulder 3a and the angle α of valve rod 3 axis Between 75 °～85 °.

Lock pin 5 traverses in the middle part of tubular element 8, and the middle part of tubular element 8 is provided with to traverse for the bar shaped through valve rod 3 and wears Hole, lock pin 5 is connected with described valve rod 3 by the part in tubular element 8 pipe；Tubular element 8 passes through outside the pipe of lock pin 5 side The mating holes that wall is provided with described valve body 2 forms sliding connection, the endoporus of this section of pipeline section is formed with interior step, this section pipe The endoporus of section installs described second spring 6, and interior step is abutted with one end of second spring 6, and the other end of second spring 6 abuts On plug screw 9, plug screw 9 is screwed on described valve body 2, is provided with the protection cap 10 being screwed on valve body 2 outside plug screw 9, and valve body 2 leads to Cross same screw to screw togather with plug screw 9 and protection cap 10；The far-end that tubular element 8 is located at lock pin 5 opposite side is connected with barrier film 7.

In the present embodiment, the angle α of the taper seat of conical shaft shoulder 3a and valve rod 3 axis is between 78 °～82 ° Good.

Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area Member just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all this technology necks In domain, technical staff passes through logical analyses, reasoning or limited reality on the basis of existing technology according to design of the present utility model Test available technical scheme, all should be in the protection domain being defined in the patent claims.

Claims (8)

1. a kind of stop valve with simple articulation, including the valve port for connecting fluid passage（1）Be slidably fitted in valve Body（2）On valve rod（3）, valve rod（3）It is connected with lockable mechanism, valve rod（3）And valve body（2）Between be provided with for driving valve rod （3）First spring of movement（4）, valve rod（3）Front end is provided with flap（13）, with when lockable mechanism is in released state, flap （13）To valve port（1）Fluid passage formed closure；It is characterized in that, described valve rod（3）Front end is screwed with ball pin（14）, ball pin （14）By locking nut（15）It is locked in valve rod（3）On, described first spring（4）It is connected to locking nut（15）With institute State valve body（2）Between；Described flap（13）By flap（13）Half ball-and-socket of upper formation and ball pin（14）A bulb part even Connect, flap（13）On be welded with spherical cap（16）, this spherical cap（16）Half ball-and-socket of upper formation and ball pin（14）Bulb another part Connect.

2. the stop valve with simple articulation according to claim 1 is it is characterised in that described spherical cap（16）By circumference Two lobe compositions of decile.

3. the stop valve with simple articulation according to claim 1 and 2 is it is characterised in that described lockable mechanism bag Include lock pin（5）, lock pin（5）It is inserted in valve rod by horizontal（3）Cannelure in valve rod（3）Form the locking of valve opening state, Lock pin（5）It is respectively provided on two sides with second spring（6）And barrier film（7）, second spring（6）And barrier film（7）It is respectively used to lock pin（5）'s Locking and the mobile driving of unblock；Described barrier film（7）With valve body（2）Between form diaphragm cavity, this diaphragm cavity and described fluid passage Connect.

4. the stop valve with simple articulation according to claim 3 is it is characterised in that described lock pin（5）For circle； Described valve rod（3）Cannelure side be formed with the conical shaft shoulder（3a）, lock pin（5）With the described cone shaft shoulder（3a）In tangent Abutting state formed to valve rod（3）Locking.

5. the stop valve with simple articulation according to claim 4 it is characterised in that described cone the shaft shoulder（3a） Taper seat and valve rod（3）The angle α of axis is between 75 °～85 °.

6. the stop valve with simple articulation according to claim 3 is it is characterised in that described lock pin（5）Traverse Tubular element（8）Middle part, tubular element（8）Middle part be provided with for through described valve rod（3）Bar shaped traverse perforation, lock pin （5）By positioned at tubular element（8）Part in pipe and described valve rod（3）Connect；Tubular element（8）By lock pin（5）Side Pipe outer wall and described valve body（2）The mating holes being provided with forms sliding connection, and the endoporus of this section of pipeline section is formed with interior step, The endoporus of this section of pipeline section installs described second spring（6）, and interior step and second spring（6）One end abut, second spring（6） The other end be connected to plug screw（9）On, plug screw（9）It is screwed on described valve body（2）On；Tubular element（8）Positioned at lock pin（5）Another The far-end of side and barrier film（7）Connect.

7. the stop valve with simple articulation according to claim 3 is it is characterised in that described barrier film（7）Middle part is solid Surely it is connected with rigid dish type end liner（10）.

8. the stop valve with simple articulation according to claim 3 is it is characterised in that described valve rod（3）By front end To described valve port（1）Fluid passage formed closure, valve rod（3）Tail end exposes described valve body（2）Outside, valve rod（3）Tail end shape Become to have free-hand handgrip（3b）.