CN201083283Y

CN201083283Y - Ball valve

Info

Publication number: CN201083283Y
Application number: CNU2007201847754U
Authority: CN
Inventors: 潘建参; 连超燕; 祝云霞
Original assignee: NINGBO HUACHENG VALVE CO Ltd
Current assignee: NINGBO HUACHENG VALVE CO Ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2008-07-09
Anticipated expiration: 2017-10-19

Abstract

The utility model discloses a ball valve, comprising a valve body, a valve core of ball valve, a valve rod and a handle. The utility model is characterized in that the handle comprises an upper handle and a lower handle, the lower handle is fixedly connected with the valve rod, the upper handle is movably hinged on the lower handle; an extension part on the side face of the front end of the upper handle and the front end of the lower handle form a switching clamp; when the valve is closed, the clamp and a protruding limitation part of the valve body are in clamping fit; when the valve is turned to be opened, the extension part on the side face of the front end of the upper handle and the protruding limitation part are in blocking fit, thereby forming a locking structure; a spring supports between the back part of the upper hand and the lower handle. The ball valve can be closed and opened only by firstly opening the handle, and even if the fit between the valve rod and the valve body is loosened, the defect of the automatic opening of the ball valve is also avoided, thereby not only improving the quality and the safety of products, but also prolonging the service life.

Description

A kind of ball valve

Technical field

The utility model relates to a kind of ball valve.

Background technique

Common ball valve mainly is made up of parts such as main valve body, pair valve body, valve rod, spheroid, handles as shown in Figure 5.Pay valve body and connect with main valve body by screw thread, rely on single rubber ring seal in the body, the top is with the sealing of " O " type circle, and handle is placed in the valve rod also fastening with nut.

This type of ball valve is by widespread usage in actual life, but all is used in state of rest usually or vibrates in the middle of the minimum occasion.Because ball valve frequently opens and closes in use, tend to because valve rod causes defectives such as automatic opening-closing with the valve body matching loose, bring many troubles to people's life.

It as the patent No. 02261105.3 Chinese patent " locking-type valve ", it comprises valve body, spool, valve rod and one independently open and close handle, locking plate of socket on the valve rod, locking plate circumferentially is fixed on the valve rod, be provided with a spring between locking plate and the valve body, this spring is placed on the valve rod, lock body is near being provided with a locking device that prevents that locking plate from circumferentially rotating between this a part of madial wall of top end and the locking plate, lock housing in the external stability of lock body, the center of lock housing is a lockhole, there is an external diameter to be slightly less than the plush copper of lockhole on the above-mentioned switching handle, a recess that is complementary with valve rod outer end shape is arranged in the plush copper.During to this locking-type valve operation, need locking plate be moved down with opening and closing taper knob on valve rod, could the rotary opening closing handle.Its this structure mainly has problems and is, is unfavorable for sealing, in case self-locking mechanism damages, safeguards very difficult, practical inadequately; It as the patent No. 90201829.9 Chinese patent " self locking safety ball valve ", relating to main body is made of a valve body, a spheroid, two sealing seats and two valve seats, a kind of self locking safety ball valve that control operation part is made up of valve rod, connecting sleeve, handle, lock core base, lock core cover, lock core, lock pin, lock pin spring, lock core cover gland etc., it utilizes the internal structure of ball valve own to finish auto-lock function, also has similar problem.

Comprehensively above-mentioned, traditional ball valve requires further improvement design.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of simple and practical, working service ball valve easily, it has only under the condition of formerly opening handle just, and may command opens and closes ball valve, even the phenomenon of matching loose appears in valve rod and valve body, the defective that can avoid ball valve to open or close automatically equally, so not only improved the quality and the Security of product, also can increase the service life.

The technological scheme that the utility model solve the technical problem employing is: a kind of ball valve, it comprises valve body, ball valve core, valve rod, handle, it is characterized in that handle is divided into upper handle and lower handle, lower handle is fastened on the valve rod, and upper handle is to be hinged on versatilely on the lower handle, and the front end side extending part of upper handle and the front end of lower handle constitute the folder mouth of folding, under the valve closing state, folder mouthful carries out interlock and cooperates with projection limited part on the valve body, and under the valve Unscrew state, the front end side extending part and the projection limited part of upper handle carry out gear and cooperate, thereby the formation locking structure is supported with spring between the rear portion of upper handle and the lower handle.

Described upper handle is to be hinged on movably on the lower handle by rivet or pivot pin, is convenient to make.

Bayonet socket is left at extending part rear portion, described upper handle front end side, carries out gear with the projection limited part and cooperates; Accordingly, the front end of lower handle is also left bayonet socket, cooperates with the projection limited part, is convenient to gear and interlock like this, locks more reliable and more stable.

Be lined with seal washer and O type circle between described ball valve core and the valve body, O type circle is embedded on the seal washer, to improve sealability.

Described lower handle is fastened on the valve rod with nut, and the back boxing internal tooth lock washer is to improve the locking amount of tension.

Described valve body is divided into main valve body and auxiliary valve body, and liner O type circle is connected and fixed with bolt on their junction planes, to improve sealability.

Be lined with multiple tracks O type circle between described valve rod and the valve body, to improve sealability.

Compared with prior art, advantage of the present utility model is: 1. because this type of handle device, therefore can avoid in bullet train or vibration occasion, the ball valve failure phenomenon taking place, improve Security, reliability and stability, and can prolong the working life of ball valve; 2. owing to adopt the dual fail-safe seal arrangement of seal washer and O type circle between spheroid and the valve body, so its sealing effect is more excellent, more insurance, and service time is more lasting; 3. because main paying between the valve body used Bolt Connection, therefore more convenient when maintenance and part exchanging.Overall structure is simple and practical, and is easy to use, and maintenance is also convenient.

Description of drawings

Fig. 1 is the side view of the ball valve that provides of the utility model;

Fig. 2 is the cross-sectional view of Fig. 1 along A-A;

Fig. 3 is a stereogram of the present utility model;

Fig. 4 is a stereogram of the present utility model;

Fig. 5 is the cross-sectional view of ordinary ball valve.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Among the figure: 1, main valve body, 2, auxiliary valve body, 3, seal washer, 4, ball valve core, 5, bolt, 6, O type circle, 7, O type circle, 8, valve rod, 9, O type circle, 10, lower handle, 11, upper handle, 12, packing ring, 13, nut, 14, rivet, 15, spring, 16, limited part, the front end of 10a, lower handle, the front end side extending part of 11a, upper handle, the front end bayonet socket of 10b, lower handle, the front end side extending part bayonet socket of 11b, upper handle.

As depicted in figs. 1 and 2, this ball valve comprises 15 parts, and wherein main valve body 1 is fastening by bolt 5 (4) with auxiliary valve body 2, is provided with O type circle 6 between the middle junction plane; Be provided with seal washer 3 and O type circle 7 between ball valve core 4 and the

valve body

1,2, each 2; Be provided with O type circle between valve rod 8 and the main valve body 1, also be 2, the lower end links to each other with ball valve core 4, the upper end is connected by nut 13 with lower handle 10, and back boxing internal tooth lock washer 12, be used for increasing the coupling mechanism force between lower handle 10 and the valve rod 8, lower handle 10 is hinged rotationally by the parts and the upper handle 11 of rivet 14 or pivot pin, the front end side extending part 11a of upper handle and the front end 10a of lower handle constitute the folder mouth of folding, under the valve closing state, folder mouthful carries out interlock and cooperates with projection limited part 16 on the valve body, and valve Unscrew state is spent as rotating 90 down, and the front end side extending part 11a of upper handle carries out gear with projection limited part 16 and cooperates, thereby constitutes locking structure, for the ease of locking, extending part rear portion, upper handle front end side has bayonet socket 11b, and the front end of lower handle also has bayonet socket 10b, cooperates with projection limited part 16, be supported with spring 15 between the rear portion of upper handle 11 and the lower handle 10, come resetting of Joystick by spring 15 therebetween.

In the present embodiment, it is that material is made that seal washer 3 adopts teflon, and it is that material is made that all O type circles adopt NBR, all seals; 4 bolts 5 should be uniformly distributed in valve body around; Though upper handle 11 is riveted by rivet 14 with lower handle 10, must guarantee to go up the lower handle activity freely; Internal tooth lock washer 12 is the coupling mechanism forces that are used for increasing between lower handle 10 and the valve rod 8; Spring 15 is to be used for controlling lower handle to be in interlocking pattern forever.

The assembly process of this ball valve: 9,2 on socket O type circle on valve rod 8 at first, and insert in the top of main valve body 1 from lower to upper; Put into seal washer 3 and O type circle 7 again in main valve body 1, O type circle 7 is embedded in the seal washer 3, ball valve core 4 is put into main valve body 1 and joins with the lower end of valve rod 8; Then seal washer 3 and O type circle 7, O type circle 6 are put into auxiliary valve body 2; Then the major-minor valve body is tightly connected together by bolt 5; The handle that will assemble in advance and be up to the standards is tightened by nut 13 and internal tooth lock washer 12 and is got final product at last.Obviously, the assembly technology of this ball valve unlike the complexity of ordinary ball valve what, in control of quality, do not influence assembling speed.

Its working principle is such, when will close ball valve, see Fig. 4, must press upper handle 11, make the front end side extending part bayonet socket 11b of upper handle 11, break away from the projection limited part 16 on the valve body, no longer carrying out gear cooperates, like this, can handle with sleeve, make lower handle drive ball valve core 4 and rotate, thereby throttle down, openhanded opening resets upper handle 11 under the resilient force of spring, the front end side extending part 11a of upper handle 11 rotates once more, constitute the folder mouth of folding with the front end bayonet socket 10b of lower handle, a folder mouthful folder is stung on the projection limited part 16 on the valve body, prevents the defective of avoiding ball valve to open automatically, sees Fig. 3.

Claims

1. ball valve, it comprises valve body, ball valve core, valve rod, handle, it is characterized in that handle is divided into into upper handle and lower handle, lower handle is fastened on the valve rod, and upper handle is to be hinged on versatilely on the lower handle, and the front end side extending part of upper handle and the front end of lower handle constitute the folder mouth of folding, under the valve closing state, folder mouthful carries out interlock and cooperates with projection limited part on the valve body, and under the valve Unscrew state, the front end side extending part and the projection limited part of upper handle carry out gear and cooperate, thereby constitute locking structure, are supported with spring between the rear portion of upper handle and the lower handle.

2. ball valve according to claim 1 is characterized in that described upper handle is to be hinged on the lower handle movably by rivet or pivot pin.

3. ball valve according to claim 2 is characterized in that extending part rear portion, described upper handle front end side leaves bayonet socket, carries out gear with the projection limited part and cooperates; Accordingly, the front end of lower handle is also left bayonet socket, cooperates with the projection limited part.

4. according to claim 1 or 2 or 3 described ball valves, it is characterized in that being lined with between described ball valve core and the valve body seal washer and O type circle, O type circle is embedded on the seal washer.

5. ball valve according to claim 4 is characterized in that described lower handle is fastened on the valve rod with nut, and, the back boxing internal tooth lock washer.

6. ball valve according to claim 5 is characterized in that described valve body is divided into main valve body and auxiliary valve body, and liner O type circle is connected and fixed with bolt on their junction planes.

7. ball valve according to claim 6 is characterized in that being lined with between described valve rod and the valve body multiple tracks O type circle.