CN87204849U - Quick valve - Google Patents

Abstract

The utility model relates to a hand-operated quick valve. The hand-operated quick valve is suitable for the opening and closing device of the fluid convey pipeline, and also is suitable for the emergent safe closing device of the coal gas or steam pipeline. The utility model is characterized in that the allotype rubber pad sealing which has good sealing performance is adopted, and simultaneously a lever cam link gear is adopted. The utility model has fast opening and closing, and only needs one second. The pressure head of the fluid medium is totally converted into the speed head, and the huge impact force is generated. The utility model is used for clearing the cabin and damaging the arch for the coal cabin in the coal industry. The function is similar to the foreign 'air bubble '.

Description

Quick valve

The utility model relates to a kind of pipe break valve, especially as the quick unlatching and the cutoff device of various fluid circuit transporting systems.

In prior art, more general hand stop valve adopts pressure spring to compress and opens and closes the structure that body (flap) seals and resets.Russian Patent F16K1/36 for example; F16K47/04, № .676795, date of application: on April 3rd, 1987, № 2597573/25-08 date of publication: on July 3rd, 1979, (в, м, к а р л и н e р и в. и. л e з м а н), the switching body of this valve and valve seat all are plane sealings.When valve cuts out, by the flow section at place, medium inlet on vertical of flap and the valve body seal action first time that combined, then by the annular level circle that protrudes on the flap, compress on the soft sealing structure that is embedded on the valve seat, become sealing for the second time, thus the seal structure complex of this valve, and the requirement on machining accuracy height, and under the situation that opens and closes the body frequent operation, seal ring is subjected to the impact of working medium to be sneered bad easily or come off.The inside screw stop valve of the J11F-16 of domestic production and for example, also be fixed with the rubber flat plate seal ring on the flap, because of it is a plane with the valve seat mating face, so under the sealing load effect, can produce radial deformation, again because of its profile without any constraint, so that can not resist working medium pressure, thereby can not guarantee that valve has excellent sealing performance.And general hand stop valve all compresses by pressure spring and opens and closes body and seal and reset, so when higher working medium pressure, spring certainly will have bigger device compressive force (promptly first compressive force), and with the opposing working medium pressure, the beginning can be played seal action.But the device compressive force is big more, and then when people's hand starting lever promoted flap, the opening force that needs was also big more.Otherwise do not offset the tension force of spring, just do not open flap yet.If amplify the staff active force only according to hand lever, then often be subjected to the restriction of lever length and can not make the resistance that the staff active force is amplified to is enough to overcome spring, therefore, can not realize opening the purpose of flap, let alone open fast with hand lever.If employing handwheel---screw structure comes the open and close flap, it is very long then to take time, and is generally 2～3 minutes, therefore, does not also reach the purpose of quick opening and closing flap.

The purpose of this utility model is to avoid in the prior art, above-mentioned deficiency, and provide a kind of novel manual quick valve, this valve system adopts special-shaped rubber pad to make seal element, add sealing gland on this seal element top, on then seal ring is defied death the shaft shoulder in its underpart at valve rod with nut, and when valve cuts out, the top circumference of special-shaped rubber gasket, be enclosed in the end face annular flange flange inner chamber of sealing gland, the protrusion round platform of sealing gasket bottom then is inlaid in the iron port recess of valve seat, so when sealing gasket is subjected to working medium pressure, can not make radial expansion because its volume is controlled at respectively in gland and the valve seat groove, thereby guarantee the excellent sealing of valve.Simultaneously, the utility model is also pieced together fully and has been abandoned pressure spring commonly used and open and close body and seal and reset mode compressing, and has adopted lever---cam linkage mechanism, the unlatching of direct manipulation flap or close.Pass through lever---the employing of cam mechanism, the staff active force is carried out twice amplification, this valve is enough to produce and overcomes inertial force and surface friction drag required when opening flap, and required sealing force and amplely have Yu abundant when closing flap, so can realize the purpose of opening rapidly or cutting out.

The utility model is finished by following approach, and this valve is made up of parts such as valve seat, valve rod, seal ring, spring, valve gaps.The sealing position of seal ring is made into the circular duplex boss that external diameter does not wait, and the boss that upper diameter is big embeds in the circular groove of sealing gland end face; Seal ring and sealing gland all are assembled on the valve rod, and the top of assembly is by valve rod shaft shoulder location, the bottom then with nut with its back of the body tightly on valve rod, assembly and valve rod must not produce relative displacement.When valve was in closed condition, the lower boss that the diameter of seal ring is little in the iron port recess on the inserted valve seat, like this, had just guaranteed that seal ring can not radial expansion, simultaneously can axial displacement yet, and play fabulous seal action.

Be used to realize lever---the cam linkage mechanism of its opening and closing action, wherein, cam is a plate cam, is made of two lobe plates and a side batten, the middle deep trouth that forms, and end face has a shorter square shaft that protrudes.The flat part of cutting of valve rod head (lower end) is packed in the cam path, and is hinged by cutting slotted hole and bearing pin that flat part opens, and bearing pin then is to be transverse in the hole of two side plates of cam, and with screw bearing pin is fixed on the cam.Handle then is to be installed on the square shaft of cam face, and by pressing plate and screw.When the widely different commentaries on classics of operating grip, cam is the virtual center rotation with the different guide face on the sealing gland then, drive valve rod by bearing pin simultaneously and move up and down as straight line, thereby, realize the opening and closing of flap.There is a tapped hole valve rod end (lower end), by micrometer adjusting screw, can finely tune the relative position of bearing pin and valve rod, thus the stroke distances up and down of can regulate valve rod.

Description of drawings:

Fig. 1 is main structure figure of the present utility model

Fig. 2 is that the A of main structure figure of the present utility model is to view

Fig. 3 is cam structure figure of the present utility model

Embodiment during the utility model is incited somebody to action in conjunction with the accompanying drawings is described in further detail, as shown in Figure 1, valve gap (10) is equipped with in the upper end of valve seat (9), valve rod moving up and down (3) is housed in the guide hole of valve seat (9) and valve gap (10), seal ring (2) is housed on the valve rod (3), and the valve rod (3) between seal ring lower end and valve seat (9) guide hole upper-end surface is with spring (11).Sealing gland (1) is arranged in the seal ring upper-end surface, piece together on the tight shaft shoulder with nut (2) at valve rod in its underpart.

The valve port place of valve seat (9) has and is used to embed the groove of seal ring (2) bottom than the minor diameter sealing surface.Valve seat (9) is an ironcasting.Open and close body by valve rod (3), fixing ring (2), sealing gland (1), nut (12) is formed, wherein seal ring (2) is the duplex round boss structure that the diameter made with rubber does not wait, there is the circular hole of piercing at the center, top, the big footpath outer rim of frustum cone structure matches with the annular boss internal diameter of part (1) and forms a fixing even part, one side that the round platform lower diameter is little then combines with valve seat (9) iron port recess and forms the even part of a slip, so, seal ring is under the working medium pressure effect, or under the effect of sealing impacting force, all unlikely to radially expansion, produce rheology, and become a solid control volume, realize good seal action.Valve rod (3) is the stepped shaft garden axle made from round steel, the processing of one end is cut flat, thickness size and protruding axle middle part deep trouth width are complementary, and process oval perforation cutting flat place, aperture and bearing pin (6) diameter is movingly, valve stem tip has the screw system usefulness for micrometer adjusting screw installations, owing to micrometer adjusting screw, can make millimeter displacement of counting of the valve rod (3) and the rigging position of bearing pin (6), with the adjustment valve rod travel.The middle part diameter of valve rod matches with described (1) and part (2) center hole, because the shaft shoulder is arranged at valve rod top, and the bottom has processed one section screw thread, so after part (1) and (2) are packed the valve rod middle part into, shaft shoulder resisting piece (1), and part (2) has guaranteed that they do not produce relative displacement to valve rod, thereby has guaranteed the seal action of seal ring because the assembly of nut is tight.Spring (11) with pretightening force, be when Open valve, because the tension force of spring makes the unlikely disengaging working track of cam (4), when operating to help handle (5), cam is that virtual center is rotated to reach the effect of unlatching or throttle down with the plane of trajectory orbital.When the needs throttle down, can pass through handle (5) and drive cam (4) rotation, overcoming under working medium pressure and the spring tension situation, open and close body and move down, the flow section at valve seat place is interdicted.

Cam (4) is to be formed through machining by shaped steel, and there is a deep trouth that is complementary with Dimension of valve stem head at its middle part, and there is the shorter square shaft of a projection side end face, and its size and handle (5) upper aperture size is complementary.The cam work surface curve has one section lift angle and is zero circular arc in the section of closing, cam working face constitutes the cam pair with guiding plane on the sealing gland that is fixed on valve seat (9) lower end.Make its self-locking stably after throttle down, unlikely generation pine folder phenomenon.Cam links to each other with valve rod by bearing pin (6), and cam and bearing pin are that affixed valve rod and bearing pin then are hinged.Micrometer adjusting screw (7) then screws in the screw of valve rod end, and when cam working face is worn, or valve rod travel be need adjust the time, but then the turn micrometer adjusting screw to guarantee that seal ring can play reliable seal action.Handle (5) is to make with round steel, and it is packed into behind the cam square shaft, can be done join buting iron by pressing plate and screw (8), avoids coming off from cam.Valve gap (10) forms through machining for ironcasting.

The utility model has following advantages compared with the prior art, and this valve insert is simple in structure, good seal performance, and when test open and close number of times reached more than 3000 times, valve did not have any Seepage. Manually opened or closing motion is rapid, only need to finish a second, thereby make the head of working media almost completely be converted to velocity head, can produce huge gas shock power, bring down stocks broken arch when can be used as coal bunker blocking in the coal industry, effect is very remarkable. And rapid operation, simple in structure, be easy to processing and manufacturing, production cost is low, and result of use is good, and social benefit is remarkable. " air bubble " that this valve price is only introduced for the U.S. (bring down stocks broken arch with) 1/10. Its superiority, being far from other hand stop valve can compare. (the open and close time of other valve all reaches several minutes).

Claims (5)

1, a kind of manual rapid closing stop valve, a valve seat (9) is arranged, valve gap (10) is equipped with in the upper end of valve seat (9), valve rod moving up and down (3) is housed in the guide hole of valve seat (9) and valve gap (10), seal ring (2) is housed on the valve rod (3), on the valve rod (3) between seal ring lower end and valve seat (9) the guide hole upper-end surface, is with spring (11).It is characterized in that (one) seal ring (2) is to adopt special-shaped rubber seal, the duplex round boss is made at its sealing position, in the circular groove on ball embedding sealing gland (1) face that diameter is bigger, seal ring (2) and sealing gland (1) are installed on the valve rod (3), with shaft shoulder location, fix with nut below above.The valve port place of valve seat (9) has and is used to embed seal ring (2), and the bottom is than the groove of minor diameter sealing surface.(2) linking lever and cam switching mechanism, cam (4) are to be made of two wheel plates, the middle deep trouth that forms, an outstanding square shaft is arranged on the end face, (3) processing of valve rod are cut flat, and perpendicular to cutting slotted hole of processing on the flat plane, hinged by the bearing pin and the cam that penetrate slotted hole.Handle (5) is housed on the square shaft, and cam working face constitutes the cam pair with the guiding plane that is fixed on the sealing gland of valve seat (9) lower end.

2, according to the said quick valve of claim 1, it is characterized in that there is a circular screwhole said valve rod (3) termination, screw in the trimming bolt (7) of adjustable valve throw of lever distance in the screw, valve rod (3) is made with metallic material.

3,, it is characterized in that said seal ring (2) is the duplex round boss structure made from rubber according to the said quick valve of claim 1.

4, according to the said quick valve of claim 1, it is characterized in that said cam (4) is the plate cam of being made by shaped steel, it makes the null one section circular arc of lift angle in the section of closing.

5, according to the said quick valve of claim 2, it is characterized in that the stepped shaft circular shaft that valve rod is made with shaped steel, there is the shaft shoulder at the middle part and thread groove is arranged.

Images