CN202402673U

CN202402673U - Quickly-opened stop valve with sealed ceramic valve clacks

Info

Publication number: CN202402673U
Application number: CN2011204499326U
Authority: CN
Inventors: 戴学祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-07
Filing date: 2011-11-07
Publication date: 2012-08-29
Anticipated expiration: 2021-11-07

Abstract

The utility model provides a quickly-opened stop valve with sealed ceramic valve clacks. A valve body is connected with a valve bonnet through bolts, a valve rod is connected with an upper valve clack and extends out of the valve bonnet to be connected with a handle by means of positioning, runner holes and round bosses in a lower valve clack are formed on two sides of the circumference, a valve body sealing ring is respectively in hermetic contact with a sealing surface on the lower valve clack and a stepped sealing plane on the valve body, a valve bonnet sealing ring respectively tightly contacts with the valve bonnet and a step of an outer circle of the upper surface of the lower valve clack, the tail end of the valve rod is an n-shaped rectangular block, an outer circle and an inner circle, on two sides of the n-shaped rectangular block, are connected with an outer circle and an inner circle on a groove in the upper valve clack, the n-shaped rectangular block is an upper sealing conical frustum upwardly, the end face of the upper sealing conical frustum contacts with an upper sealing gasket, the upper surface of a belleville spring contacts with the end face on the valve rod, the lower surface of the belleville spring contacts with the plane on the upper valve clack, the outer circle and the inner circle of the valve rod are movably matched, the center of the upper valve clack is a rectangular block, two sides of the upper valve clack connected with the rectangular block are ring-shaped, one surface of each ring shape is provided with an inward recessed annular groove, a small through runner hole is arranged on one side of each ring shape, and the sealing surface of the upper valve clack contacts with the sealing surface in the lower valve clack to be sealed.

Description

The ceramic valve flap seal open stop valve soon

Technical field

The invention belongs to stop valve, relate in particular to the design of opening stop valve soon of ceramic valve flap seal.

Background technique

Stop valve mainly is to constitute with bolted valve gap each other with the valve chest that is provided with fluid passage and; Connect and the medium that dams when opening and closing in order to be supported in; Need be with so that the drive screw that valve moves between passage opening and closing position be done vertical moving up and down to drive flap in valve casing; Screw rod passes housing, is positioned at the outside of this valve, is connected by handwheel to drive.Tightness between the wall of guaranteeing fluid passage and housing periphery; Also need a valve seat; Valve seat is circular, inner circumferential surface with housing in form and fit snugly on the fluid passage, the conical surface of valve seat and flap connects airtight to claim to be the sealing pair of stop valve when full cut-off.

End in the valve housing (generally being often referred to the valve below the 50mm) small-sized, valve seat normally is embedded in the hole of valve flowing channel, and flap is processed by chromium stainless steel or Hardmetal materials, this forged steel valve that is used on the petrochemical industry device.

Stop valve is most to be used on the device of petrochemical industry pipeline, and the sealing surface of this stainless steel material is not very desirable at the sealing effect that uses, because; The sealing surface of metallic material is except fretting wear; Also there are erosion and scratch and adhesive wear, influence sealing effect and working life, therefore; The interior phenomenon of leaking with regard to ubiquity after one break time of using on the market for a long time, and maintenance is relatively more difficult.So, need work hard improving on wear-resisting, the corrosion-resistant and hardness of valve base sealing, up to the present, some proposed high abrasion ceramic valve technology as follows.

Patent documentation one: the patent No.: 94218557.9 " ceramic seal face stop valve ".The characteristic of this valve can only be applicable to supply channel and heating system by following reason; Being sealed into of valve rod and valve gap described in second page of 14～15 row of specification: its stage casing is for there being the circle footpath of two annular grooves (15); O type circle (16) is housed in the annular groove (15), this O type circle is worked usually at normal temperatures, and the temperature of industrial pipeline generally can be at 120 ℃～425 ℃ or can be higher to 550 ℃.Being sealed at Instructions Page 2 25～27 line description valve bodies and stator in addition: the upper end interplanar of the stator (6) the endoporus (24) of valve gap (4) lower end in and the water intake (27) of valve body (1) is equipped with elastic sleeve (28), in order to move, stator exert pressure with obtain to move, the combining closely and sealing be provided of the fitting surface of stator.Elastic sleeve (28) is not used any material though the inventor puts down in writing in specification, be the rubber manufactured good that the normal temperature the same with O type circle (16) is worked down too from valve mechanism analysis.

Patent documentation two: the patent No.: 9924449.3 " ceramic seal face stop valve ".Wherein: the author is stated as at second page of the 6th～7 row of specification: referring to figure (3) is sealing gasket, on the sealing circumference, is provided with a positioning hole (31), is provided with 180 degree fan-shaped pylones 32 above.First page of 18～19 row of specification is stated as in addition: the utility model does not have to be prone to aging, easy to wear rubber, plastics are participated in sealing, can not take place to leak and influences bulk life time.Suppose that the sealing gasket like Fig. 3 is that the power of leaning on valve gap 7 to screw forces to make lower valve core and valve body 1 to form sealing for the non-metal kind material, this sealing means is too in simplification, and defective is: under the situation that does not obtain external force, interior leakage can occur.The Spielpassung of the cylindrical of spool 3 and spool 4 and valve body 1 can leak into valve body 1 and form the consequence that a large amount of media leak outside with the screw thread place that valve gap 7 combines in addition.

Summary of the invention

The present invention possibly overcome the above problems, and that purpose provides is a kind of " ceramic valve flap seal open soon stop valve " (the following stop valve that all is called), and the high hardness of ceramic flap and highly corrosion resistant can prolong the life-span of stop valve and the reliability of long-term maintaining valve door sealing.

The present invention is a prerequisite with the quick open type stop valve of ceramic valve flap seal, and characteristic is: valve body is by bolted bonnet (BB), and valve rod connects goes up flap, and valve rod stretches out valve gap and is connected with handle through the location.

The both sides that runner hole in the lower Disc, round boss are formed in circumference; Valve seals respectively with lower Disc on sealing surface and the step sealing plane contact seal on the valve body, valve bonnet seal circle one side closely contacts with step plane contact, another side and the step of cylindrical above the lower Disc on the valve gap.

The not end of valve rod is a ∩ shape rectangular block, wherein, the cylindrical of both sides and interior circle respectively with last flap in groove on cylindrical and interior circle be connected, ∩ shape rectangular block upwards is to seal round platform on one, end face contacts with last sealing gasket.

The one side that goes up of butterfly spring contact with end face on the valve rod, following simultaneously with last flap on plane contact, movingly flexible in cylindrical and the valve rod.

Last flap center is that the coupled both sides that connects of rectangular block is that circular, one side has the annular groove that concaves into, a side wherein to establish the small flow channels hole that connects, and sealing surface contacts the situation that becomes sealing with sealing surface in the lower Disc.

Beneficial effect of the present invention is following:

Long service life; The pottery flap has superpower hardness; Corrosion-resistant superior with crocking resistance; In working life that can highly effective raising valve, for example JB/T8859-2004 stop valve static pressure life-span rules regulation Grade A A life time of the level number of times is 3000 times, and the life-span of high-class product is 6000 times; Acceptable product do not have life requirements, and the working life of ceramic flap minimum can reaching 300,000 times.

High temperature high voltage resistant: valve body and valve gap are excellent suitability for press forming, and pad is stainless steel+graphite synthetic products with valve rod sealing member can adapt to safe and reliable work under different high and low temperatures.

Operational torque is little: the sealing surface of ceramic flap is a plane structure up and down, and highly polished, contacts to be the contact of the flexibility under the spring pressure, and therefore, action required power is little.

Switch is convenient and swift: handle drives the valve rod half-twist and gets final product the opening and closing valve, can fully save human resources.

Description of drawings

Diagram major part sign indicating number number: 1, valve body, 2, valve seals, 3, lower Disc, 4, the valve bonnet seal circle, 5, go up flap; 6, valve rod, 7, butterfly spring, 8, go up sealing gasket, 9, valve gap; 10, filler, 11, Gland, 12, handle, 13, positioning block; 14, bolt, B, inlet channel, A, outlet flow, C, valve gap space.

Embodiment

Of the present invention these are described in detail through figs with other purpose advantage.

Fig. 1 is the sectional view of opening stop valve soon of ceramic valve flap seal of the present invention.

Fig. 2 is the perspective view of opening flap on the stop valve soon of ceramic valve flap seal of the present invention.

Fig. 3 is the projection view of flap on Fig. 2.

Fig. 4 is the perspective view of opening the stop valve lower Disc soon of ceramic valve flap seal of the present invention.

Fig. 5 is the projection view of Fig. 4 lower Disc.

Fig. 6 is the perspective view of opening the stop valve valve body soon of ceramic valve flap seal of the present invention.

Fig. 7 is the perspective view of opening the stop valve valve rod soon of ceramic valve flap seal of the present invention.

Embodiment

Valve body (1) connects valve gap (9) by bolt (14), and flap (5) in valve rod (6) connection, valve rod (6) stretch out outside the valve gap (9), also are connected with handle (12) through positioning block (13).

Runner hole in the lower Disc (3) (3-1,3-6), round boss (3-4,3-3) are formed in the both sides of circumference; Valve seals (2) respectively with lower Disc (3) on sealing surface (3-2) and step sealing plane (1-4) contact seal on the valve body (1), valve bonnet seal circle (4) one side contacts with step plane (9-3) on the valve gap (9), another side closely contacts with the step (3-7) of the top cylindrical of lower Disc (3).

The not end of valve rod (6) is a ∩ shape rectangular block; Wherein, The cylindrical of both sides (6-4) and interior circle (6-5) respectively with last flap (5) in groove (5-2) on cylindrical (5-1) be connected with interior circle (5-3), ∩ shape rectangular block upwards is to seal round platform (6-1) on one, end face (6-2) contacts with last sealing gasket (8).

The one side that goes up of butterfly spring (7) contact with end face (6-3) on the valve rod (6), and following one side contacts interior circle (6-5) the activity cooperation of cylindrical and valve rod (6) with plane (5-8) on the last flap (5).

Last flap (5) center is that rectangular block (5-6), the coupled both sides that connects are that circular (5-4), one side have the annular groove (5-7) that concaves into; A side is wherein established the small flow channels hole (5-6) that connects, and sealing surface (5-5) contacts the situation that becomes sealing with sealing surface (3-5) in the lower Disc (3).

The round platform (16-6) at the middle part of valve rod (16) is last sealing, and (16-4) of one side is with the plane contact of last sealing gasket (8) and by means of the upwards thrust of butterfly spring (7) and the sealing of pipeline fluid active force formation valve rod (16) and valve gap (9).

Make it be in 180 ° of orientation through rotatable handle (12) drive valve rod (6), last flap (5); At this moment; The runner hole (1-2) of medium through valve body (1), vertical run hole (B), through the inlet channel hole (3-6) in the lower Disc (3); The outlet flow hole (3-1) that the lower space that gets into valve gap (9) is flowed through in the lower Disc (3) again is valve opening through the outlet flow (A) in the valve body (1) with outlet flow (1-1), otherwise for closing.

When valve is in closed condition (like accompanying drawing 1); Hydrodynamic pressure from valve body (1) inlet channel (1-2), through the runner straight hole (B) that hangs down, lower Disc (3) runner hole (3-6), go up the inner space (C) of small flow channels hole (5-6) to valve gap (9) of flap (5); Make the pressure of valve be in the state of a mutual balance in (B) and space (C) like this, purpose be go up flap (5) the downward active force of butterfly spring (7) on the other hand fluid pressure action can help valve to obtain excellent sealing closing in the power of flap (5).

Claims

A ceramic valve flap seal open stop valve soon, characteristic is: valve body (1) connects valve gap (9) by bolt (14), flap (5) valve rod (6) connections in, valve rod (6) stretch out outside the valve gap (9), also pass through positioning block (13) is connected with handle (12).
2. ceramic valve flap seal according to claim 1 open stop valve soon; It is characterized in that: the runner hole in the lower Disc (3) (3-1,3-6), round boss (3-4,3-3) are formed in the both sides of circumference; Valve seals (2) respectively with lower Disc (3) on flat (1-4) contact seal of sealing surface (3-2) and the step on the valve body (1) sealing, valve bonnet seal circle (4) one side contacts with step flat (9-3) on the valve gap (9), another side closely contacts with the step (3-7) of the top cylindrical of lower Disc (3).
3. ceramic valve flap seal according to claim 1 open stop valve soon; It is characterized in that: the not end of valve rod (6) is a ∩ shape rectangular block; Wherein, The cylindrical of both sides (6-4) and interior circle (6-5) respectively with last flap (5) in groove (5-2) on cylindrical (5-1) be connected with interior circle (5-3), ∩ shape rectangular block upwards is to seal round platform (6-1) on one, end face (6-2) contacts with last sealing gasket (8).
4. ceramic valve flap seal according to claim 1 open stop valve soon; It is characterized in that: the upward one side of butterfly spring (7) contacts with the end face (6-3) on the valve rod (6); Following one side contact interior circle (6-5) the activity cooperation of cylindrical and valve rod (6) with plane (5-8) on the last flap (5).
5. ceramic valve flap seal according to claim 1 open stop valve soon; It is characterized in that: going up flap (5) center is that rectangular block (5-6), the coupled both sides that connects are that circular (5-4), one side have the annular groove (5-7) that concaves into; A side is wherein established the small flow channels hole (5-6) that connects, and sealing surface (5-5) contacts the situation that becomes sealing with sealing surface (3-5) in the lower Disc (3).