CN2033873U

CN2033873U - Fluid control device

Info

Publication number: CN2033873U
Application number: CN 88203985
Authority: CN
Inventors: 朱兆坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-09
Filing date: 1988-04-09
Publication date: 1989-03-08

Abstract

The utility model discloses a fluid control device composed of a valve body (1), a valve rod (10), a valve head (6), a sealing member (12) and a valve cover (11). The valve head is made of polytetrafluoroethylene or rubber materials, and the valve head is contacted with a valve seat (7) in linear sealing or face sealing. The valve body (1) and the valve cover (11) are connected with a pneumatic operation device through the valve rod (10) and a double-head screw (16), a hand operation device is connected above the pneumatic operation device to make manual control convenient when the user stops operating an air source. A scapula section (10a) of the valve rod and the lower end (11a) of the neck of the valve cover form sealing structure, so the user can exchange the sealing member when the valve body has fluid and the work efficiency is improved.

Description

Fluid control device

The utility model relates to a kind of fluid control device, particularly relates to a kind of pneumatic manual rapid fluid control gear of holding concurrently that is installed on the fluid line.

Past, in the industrial production on the various fluid lines employed fluid control device (except that modulating valve) be generally cock (cock), ball valve and gate valve etc.This class valve is the difficulty of processing height during fabrication, must be through coincideing after the strict grinding as the valve head of cock and valve seat; Sealing plug dress the time also is not easy very much, and the tension valve rod just revolves motionlessly a little, and pine does not a bit then reach sealing effect, especially Sealing and seepage usually occurs after aging a little.In addition, existing this class valve in use breaks down easily, often runs into to revolve motionless phenomenons such as (stinging very), and service cycle is short, and working life is also short, must change most of member when running into special media.For above-mentioned valve is transformed, the present inventor once proposed to be different from fully on the structure the pneumatic rapid fluid control gear (patent No.: 86200872) above-mentioned valve, novel.Advantages such as this device has that manufacturing process is simple, significant sealing affection, adaptation are wide, highly versatile and long service life, on probation through over 2 years proves that its performance is better than older generation's product greatly.

Although Kai Fa pneumatic rapid fluid control gear has above-mentioned gratifying advantage first, also exist the some shortcomings part.For example when changing Sealing, need separate whole valve body fluid line or be in valve body, not to be connected with under the situation of fluid to carry out at least, relatively more inconvenient; In addition, owing to rely on pneumatic operation device to carry out the operation that opens or closes of valve fully, whole valve just can't proper functioning afterwards in case source of the gas interrupts.

The purpose of this utility model is to be further improved on the basis of the pneumatic rapid fluid control gear of developing first, not only to overcome and when changing Sealing, must separate fluid line to whole valve body or not make fluid flow through the drawback of valve body, also will change the situation of the working state of depending merely on the pneumatic operation device control valve.

Fluid control device of the present utility model is to constitute like this, it comprises valve body, valve rod, valve head, Sealing, valve gap, said valve head is teflon or rubber type of material, it is fixed on the valve rod by screw rod, nut, packing ring, pressing plate, and to make valve head be linear sealing or face seal with contacting of valve seat; Valve body connects with a pneumatic operation device by valve rod and three double threaded screws mutually with valve gap, it is characterized in that:

(a) the shoulder teat of valve rod branch also forms sealing configuration with the lower end of valve gap neck;

(b) top of pneumatic operation device connects a manual operation equipment.

Fluid control device of the present utility model has been owing to done above-mentioned improvement on the basis of fluid control device of exploitation first, so it is compared with the fluid control device of developing first and has produced following advantage:

1. because the shoulder teat of valve rod divides and the lower end of valve gap neck also can form sealing configuration (can be described as the back seal structure here), the operation of changing Sealing just can be connected with in valve body under the state of fluid to be carried out, be not connected with fluid in the valve body and needn't separate fluid line to whole valve body or make, therefore reduce stop frequency, improved the working efficiency of valve.

2. owing on pneumatic operation device, connect a manual operation equipment, so even under the situation of source of the gas interruption, also can make valve reach required working state by manually-operable, thereby improved reliability.

Concrete structure of the present utility model can be provided by following embodiment and accompanying drawing thereof.

Fig. 1 a and Fig. 1 b are the sectional drawings according to the fluid control device that the utility model proposes.

With reference to Fig. 1 a and Fig. 1 b.Fluid control device of the present utility model comprises that valve body ［ 1 ］, valve rod ［ 10 ］, valve head ［ 6 ］, Sealing ［ 12 ］, valve gap ［ 11 ］, said valve head ［ 6 ］ are teflon or rubber type of material, and it is fixed on the valve rod ［ 10 ］ by screw rod ［ 2 ］ (with the valve rod all-in-one-piece), nut ［ 4 ］, pad ［ 5 ］, pressing plate ［ 8 ］ and packing ring ［ 9 ］.Wherein in the screw rod ［ 2 ］ pin ［ 3 ］ is arranged, it mainly is used to prevent freely rotating of nut ［ 4 ］, thereby makes valve head ［ 6 ］ fixing more firm on valve rod ［ 10 ］.Valve body ［ 1 ］ itself comprises valve seat ［ 7 ］, and its α angle is 60 °, and the θ angle of valve head ［ 6 ］ is for being less than or equal to 30 °, thereby makes valve head ［ 6 ］ form linear sealing or face seal with valve seat ［ 7 ］ when contacting.When the material of valve head ［ 6 ］ was teflon, the θ angle was less than 30 °, thereby made valve head ［ 6 ］ form linear sealing with valve seat ［ 7 ］ when contacting; When the material of valve head ［ 6 ］ is rubber type of material, then makes the θ angle equal 30 °, thereby make valve head ［ 6 ］ when contacting, form face seal with valve seat ［ 7 ］.These two kinds of designs can guarantee to make valve head ［ 6 ］ and valve seat ［ 7 ］ to produce best sealing effect when contacting.Here, the material selection stainless steel of valve body ［ 1 ］ waters foundry goods or glass fibre reinforced plastics rolled-up stock, with tightness and the corrosion resistance that guarantees it.Sealing ［ 12 ］ also is a polytetrafluoroethylmaterial material, and it is embedded in the valve gap ［ 11 ］, and closely contacts with valve rod ［ 10 ］ formation, trim ring ［ 13 ］ also is housed in order to fastening above it.The topmost part mouth neck place of valve gap ［ 11 ］ is rotary with a blind nut ［ 14 ］ in order to fit sealing spare ［ 12 ］ and trim ring ［ 13 ］, wherein also is embedded with an O RunddichtringO ［ 15 ］.What deserves to be explained is that the shoulder teat branch ［ 10a ］ of valve rod ［ 10 ］ and the lower end ［ 11a ］ of valve gap neck also form sealing configuration.This sealing configuration (or being called the back seal structure) has been arranged afterwards, the operation of changing Sealing ［ 12 ］ just can continue to be connected with in valve body under the state of fluid and carry out, be not connected with fluid in the valve body and needn't separate fluid line to whole valve body or make, therefore improved the working efficiency of valve.

Valve body ［ 1 ］ connects with a pneumatic operation device by valve rod ［ 10 ］ and three double threaded screws ［ 16 ］ (wherein having does not draw) mutually with valve gap ［ 11 ］.Said pneumatic operation device mainly contains base ［ 21 ］, cylindrical shell ［ 24 ］, piston ［ 25 ］, piston rod ［ 22 ］, connecting rod ［ 33 ］ and bonnet ［ 31 ］ and forms.Wherein, cylindrical shell ［ 24 ］ is spiral marking connection with base ［ 21 ］, bonnet ［ 31 ］, and piston rod ［ 22 ］ and valve rod ［ 10 ］ are also with spiral marking connection.More than these are threaded and bring convenience for maintenance and changeing of partial component.90 ° of recesses of base ［ 21 ］ are also being inlayed a y-type seal ring ［ 18 ］ that closely contacts with valve rod ［ 22 ］, below it, inlaying an O type circle ［ 17 ］ again, and baffle plate ［ 19 ］ in order to fastening this y-type seal ring and hole are being housed up with back-up ring ［ 20 ］ at it.Piston rod ［ 22 ］ and piston ［ 25 ］ are with spiral marking connection and in addition fastening by a locknut ［ 23 ］.Connecting rod ［ 33 ］ also is with spiral marking connection with piston rod ［ 22 ］, and they all are fixed on the piston ［ 25 ］.Also inlaying 2 O RunddichtringOs ［ 26 ］ that closely contact with the inwall of cylindrical shell ［ 24 ］ on the piston ［ 25 ］.Also inlaying the seal ring ［ 29 ］ that closely contacts with connecting rod ［ 33 ］ on the bonnet ［ 31 ］, and baffle plate ［ 28 ］ and hole back-up ring ［ 27 ］ in order to fastening sealing circle are being housed.In addition, also be inlaid with the O RunddichtringO ［ 30 ］ that closely contacts with connecting rod ［ 33 ］ on the piston.Have pore ［ b ］ in this pneumatic operation device, have pore ［ c ］ in the base of this device ［ 21 ］, working gas can enter in the cylindrical shell ［ 24 ］ from pore ［ b ］ or pore ［ c ］.

Hand-operating device mainly is made up of handle ［ 41 ］, nut sleeve ［ 40 ］, lifting bar ［ 37 ］, supporting frame ［ 32 ］ etc., connects mutually with pneumatic operation device with supporting frame ［ 32 ］ by its lifting bar ［ 37 ］.Wherein, lifting bar ［ 37 ］ is interconnected by a tightening nut ［ 34 ］ at their shoulder teat ［ 37a ］ and ［ 33a ］ with the connecting rod ［ 33 ］ of pneumatic operation device.The nut sleeve ［ 40 ］ of the handle of this hand-operating device ［ 41 ］ and lifting bar is by the connection that fixes of locking cap ［ 42 ］ and trim ring ［ 39 ］, and to make rotating screw thread identical with lifting bar ［ 37 ］ again for nut sleeve ［ 40 ］.Specifically, nut sleeve ［ 40 ］ has an end of flange and the hole on the supporting frame is slidingly matched, the trim ring ［ 39 ］ that is enclosed within on the nut connects by the internal thread of outside thread with the supporting frame hole, and handle ［ 41 ］ is fixed with the other end scyewed joint of nut sleeve ［ 40 ］ and by locking cap ［ 42 ］.Along with handle handle ［ 41 ］ is done clockwise or is rotated counterclockwise, lifting bar ［ 37 ］ is just done motion up or down.For lifting bar ［ 37 ］ is rotated, also offered sliding-groove ［ 35 ］, and this groove and a pin ［ 36 ］ that is arranged on the supporting frame are matched in the lengthwise position of bar.［ 38 ］ be tank filler sleeve, from then on the hole splashes into each moving element maintenance lubricating status that lubricant oil can make this hand-operating device frequently.

Fluid control device of the present utility model is the pneumatic manual fluid control device of holding concurrently.Be to adopt pneumatic control generally speaking, at this moment the connecting rod ［ 33 ］ on lifting bar of hand-operating device ［ 37 ］ and the pneumatic operation device is in disengaged position.When pore ［ b ］ feeds working gas, piston ［ 25 ］ just moves downward, move downward simultaneously thereby drive piston rod ［ 22 ］, valve rod ［ 10 ］ and valve head ［ 6 ］, till valve head ［ 6 ］ and valve seat ［ 7 ］ match, so the fluid that is flowing in the pipeline is cut off.When moving downward, pore ［ c ］ is an exhaust port at piston ［ 25 ］, and the gas that enters is 4～5 kg/cm, and the gas of discharge is near normal pressure.Otherwise, when working gas from ［ c ］ when the hole enters, piston ［ 25 ］ just moves upward, and moves upward simultaneously thereby drive piston rod ［ 22 ］, valve rod ［ 10 ］ and valve head ［ 6 ］, so valve head ［ 6 ］ is lifted off a seat ［ 7 ］, has realized the unimpeded of pipeline inner fluid.

When interrupting, just can utilize hand-operating device to carry out the keying operation of valve in case the source of the gas of working gas hinders for some reason.At this moment, by tightening nut ［ 34 ］ lifting bar ［ 37 ］ of hand-operating device is connect mutually with the connecting rod ［ 33 ］ of pneumatic operation device.When the handle on the hand-operating device ［ 41 ］ when being rotated counterclockwise, lifting bar ［ 37 ］ just moves downward, thereby the connecting rod on the promotion pneumatic operation device ［ 33 ］, piston rod ［ 22 ］ and valve rod ［ 10 ］ and valve head ［ 6 ］ also move downward simultaneously, till valve head ［ 6 ］ and valve seat ［ 7 ］ match, so the fluid that is flowing in the pipeline just is cut off.When this handle ［ 41 ］ when turning clockwise, lifting bar ［ 37 ］ just moves upward, thereby the connecting rod on the pulling pneumatic operation device ［ 33 ］, piston rod ［ 22 ］ and valve rod ［ 10 ］ and valve head ［ 6 ］ also move upward simultaneously, so valve head ［ 6 ］ is lifted off a seat ［ 7 ］, has realized the unimpeded of pipeline inner fluid.

Claims

1, a kind of fluid control device, comprise valve body [1], valve rod [10], valve head [6], Sealing [12], valve gap [11], said valve head [1] is teflon or rubber type of material, it is fixed on the valve rod [10] by screw rod [2], nut [4], pad [5], pressing plate [8], packing ring [9], and to make valve head [6] be linear sealing or face seal with contacting of valve seat [7]; Valve body [1] connects with a pneumatic operation device by valve rod [10] and three double threaded screws [16] mutually with valve gap [11], it is characterized in that:

(a) the shoulder teat branch [10a] of valve rod [10] also forms sealing configuration with the lower end [11a] of valve gap [11] neck;

(b) top of pneumatic operation device connects a manual operation equipment, this hand-operating device mainly is made up of handle [41], nut sleeve [40], lifting bar [37], supporting frame [32] etc., lifting bar [37] by it connects with pneumatic operation device mutually with supporting frame [32], wherein, lifting bar [37] is interconnected at their shoulder teat [37a] and [33a] with the connecting rod [33] of pneumatic operation device; Nut sleeve [40] has an end of flange and the hole on the supporting frame is slidingly matched, and the trim ring [39] that is enclosed within on the nut connects with the internal thread of supporting frame by outside thread, and handle [41] connects with the other end of nut sleeve [40] and be fixing by locking cap [42].