CN207830642U - A kind of check-valves - Google Patents

Abstract

The utility model provides a kind of check-valves, belongs to technical field of valve manufacturing.Not the problems such as it is not fine that it, which solves existing check valve seal effect, and service life is shorter.Rubber washer is arranged in non-return girth sheets downside in this check-valves, annular plastics part is equipped between rubber washer and lower valve core bar, the lower end of annular plastics part have curve be extruded on rubber washer lower face under turn edge, there is annular convex ring in the outer annular surface of annular plastics part, there is indent link slot on the internal spherical surface of rubber washer, annular convex ring is connected in above-mentioned indent link slot, have what is be axially arranged vertical to enclose boss on non-return step, rubber washer lower face, which has, is sealed against ring, it is vertical to enclose boss resilient abutment in being sealed against ring and the vertical outer ring surface for enclosing boss and the inner ring surface for being sealed against ring are tilted against cooperation.Reasonable in design, the advantages that sealing effect is preferable, and service life is long of this check-valves.

Description

A kind of check-valves

Technical field

The utility model belongs to technical field of valve manufacturing, is related to a kind of check-valves.

Background technology

Check-valves is that opening and closing element is in normally off under by outer force effect, is surpassed when the pressure medium in equipment or pipeline increases When crossing specified value, by outside system discharge medium come to prevent pressure medium in pipeline or equipment be more than the particular usage valve of specified value Door.Check-valves belongs to automatic valve class, is mainly used for boiler, on pressure vessels and pipes, and control pressure is no more than specified value, to people Body safety and equipment have run important protective effect.

Check valve structure mainly has two major classes：Spring loaded check valve and lever check valve.Spring loaded check valve refers to valve Active force of the sealing of valve and valve seat by spring.Lever check valve is the active force by lever and weight.With large capacity It needs, and has a kind of pulsed check-valves, also referred to as pilot-operated type check-valves, be made of main check valve and auxiliary valve.When in pipeline When pressure medium is more than authorized pressure value, auxiliary valve is first opened, and medium enters main check valve along conduit, and main check valve is beaten It opens, makes the pressure medium increased reduction.

Existing check-valves is mainly made of shell, handle, spool, inlet and outlet channel, and this check-valves is only one in fact Kind fluid passage operates spool come on and off liquid by handle, cannot automatically be protected with the pressure change of liquid, Therefore function is limited, in particular to connects the liquid system of valve body, occurs imbalance of pressure suddenly, and liquid will rush from unbalance Go out, gently then pollutes or economic loss, it is heavy then cause casualties, therefore application is restricted；For above-mentioned this case, Occur some check-valves in the market in recent years, change the problem, such as Chinese patent literature data discloses a kind of non-return Valve [application number：200410054120.6] comprising valve seat, spool, feed pathway have a sphere in feed pathway, and sphere is extremely Feed pathway seals when feed pathway outlet port, and feed pathway is then led to when leaving outlet port, and there is band star in the sphere other side The gasket in hole, sphere are limited by inlet tube, feed pathway mouth one end connecting flange；Inlet tube is by clamp spring connecting flange；On flange There is bearing；Check-valves connects blowdown valve.The check valve structure is complex, and pressure regulating mechanism is unstable, sealing effect It is not fine, service life is shorter.

Invention content

The purpose of this utility model is to be directed to the above-mentioned problems in the prior art, is provided a kind of simple in structure, close It is preferable to seal effect, check-valves with long service life.

The purpose of this utility model can be realized by following technical proposal：A kind of check-valves, including it is internal with cavity Cylinder shape valve, the lower end of the cylinder shape valve is water inlet end, upper end is water outlet, in the cylinder valve body At upper end at upper mounting seat, lower end with lower mounting seat, it is intermediate have one to enclose non-return step, in the cylinder valve body With spool, the spool includes upper valve core bar, lower valve core bar and non-return girth sheets, and the upper valve core bar is threaded through installation On seat, the lower valve core bar is threaded through in lower mounting seat, and the non-return girth sheets is resisted against on non-return step, in upper valve core bar On be arranged with spring, one end of the spring is resisted against in upper mounting seat, and the other end is resisted against on non-return girth sheets, and feature exists In being provided with sealing device between non-return girth sheets and non-return step, sealing device is included in the setting of non-return girth sheets downside Rubber washer, is equipped with annular plastics part between the rubber washer and lower valve core bar, the lower end of the annular plastics part has Have and turn edge under curving on the rubber washer lower face described in being extruded in, there is ring in the outer annular surface of the annular plastics part Shape bulge loop, has indent link slot on the internal spherical surface of the rubber washer, and the annular convex ring is connected to described interior There is axially be arranged vertical to enclose boss, the rubber washer lower face has close in recessed link slot, on the non-return step Envelope is described vertical to enclose boss resilient abutment in being sealed against ring and the vertical outer ring surface for enclosing boss and be sealed against ring against ring Inner ring surface tilt against cooperation.

The main annular plastics part between rubber washer and lower valve core bar of this check-valves, the lower end of annular plastics part have curved Turn to turn edge under being extruded on rubber washer lower face, under turn edge and be wrapped in rubber washer from down and prevent rubber washer from bottom spool It falls off in bar；There is annular convex ring in the outer annular surface of annular plastics part, there is indent connection on the internal spherical surface of rubber washer Slot, annular convex ring are connected in the indent link slot, and there is annular convex ring barb, barb and the indent of the annular convex ring to connect Access slot coordinates, and so that rubber washer is formed with annular plastics part connected, rubber washer is further prevented to fall off from lower valve core bar；Only Returning to Chinese Taiwan, there is on rank be axially arranged vertical to enclose boss, and rubber washer lower face, which has, is sealed against ring, vertical to enclose boss resilient abutment In being sealed against ring and the vertical outer ring surface for enclosing boss and the inner ring surface for being sealed against ring are tilted against cooperation, by inclined-plane with The sealing means on inclined-plane, sealing effect is preferable, and service life is long.

In a kind of check-valves, the cylinder shape valve includes upper valve body, is threadedly coupled down with upper valve body Valve body, the upper mounting seat are located in upper valve body, and the non-return step, lower mounting seat are located in lower valve body, described The lower thread of lower valve body be connected with cylindric guard.The purpose being arranged in this way is：It is convenient that upper valve body and lower valve body are torn open It unloads, facilitates repair；The setting of cylindric guard is to prevent rubbish from entering in check-valves, increases service life.

In a kind of check-valves, there is upper connecting hole, the upper valve core bar to wear in the upper mounting seat In the upper connecting hole, there is the lower mounting seat lower connecting hole, the lower valve core bar to be threaded through the lower company It connects in hole.The purpose being arranged in this way is：Spool is limited by upper connecting hole, lower connecting hole, makes spool the operation is stable.

In a kind of check-valves, the bore dia of the upper connecting hole is more than the shank diameter of upper valve core bar, described Lower connecting hole bore dia be more than lower valve core bar shank diameter.The purpose being arranged in this way is：Upper connecting hole and lower connecting hole are also There are the effects of overcurrent.

In a kind of check-valves, the vertical cross-section of the spring is round table-like, and spring ring is straight on spring Diameter is less than the diameter of spring ring under spring, on the non-return girth sheets there is spring base, the lower spring ring of the spring to be located at On the spring base.The purpose being arranged in this way is：The elasticity stable of spring increases service life.

Compared with prior art, this check-valves is reasonable in design, simple in structure, easy to assembly, sealing effect is preferable, Service life is long, good operating stability.

Description of the drawings

Fig. 1 is the main structure diagram of this check-valves.

Fig. 2 is the schematic cross-sectional view of this check-valves.

In figure, 1, water inlet end；2, water outlet；3, upper mounting seat；4, lower mounting seat；5, non-return step；6, upper valve core bar；7、 Lower valve core bar；8, non-return girth sheets；9, spring；10, rubber washer；11, annular plastics part；11a, under turn edge；11b, annular convex ring； 12, it stands and encloses boss；13, upper valve body；14, lower valve body；15, cylindric guard；16, upper connecting hole；17, lower connecting hole；18, spring Seat.

Specific implementation mode

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As depicted in figs. 1 and 2, this check-valves is mainly made of the internal cylinder shape valve with cavity, in practical manufacture When, which includes upper valve body 13, the lower valve body being threadedly coupled with upper valve body 13 14, and the purpose being arranged in this way is：Side Just to the dismounting of upper valve body 13 and lower valve body 14, facilitate repair；The lower end of cylinder shape valve is water inlet end 1, upper end is water outlet 2, there is in upper valve body 13 upper mounting seat 3, there is a circle non-return step 5, lower mounting seat 4 in lower valve body 14, under lower valve body 14 End is threaded with cylindric guard 15, and the setting of cylindric guard 15 is to prevent rubbish from entering in check-valves, increases and uses the longevity Life.There is in cylinder valve body spool, spool includes upper valve core bar 6, lower valve core bar 7 and non-return girth sheets 8, non-return girth sheets 8 against On non-return step 5, upper valve core bar 6 is threaded through in upper mounting seat 3, and lower valve core bar 7 is threaded through in lower mounting seat 4.

In actual setting, the connection structure of upper valve core bar 6 and upper mounting seat 3 is：There is upper connecting hole in upper mounting seat 3 16, upper valve core bar 6 is threaded through in connecting hole 16, and the bore dia of upper connecting hole 16 is more than the shank diameter of upper valve core bar 6；The lower valve The connection structure of core bar 7 and lower mounting seat 4 is：There is lower connecting hole 17, lower valve core bar 7 to be threaded through lower connection in lower mounting seat 4 In hole 17, the bore dia of lower connecting hole 17 is more than the shank diameter of lower valve core bar 9；Spring 9, spring 9 are arranged on upper valve core bar 6 One end be resisted against in upper mounting seat 3, the other end is resisted against on non-return girth sheets 8.

It is provided with sealing device between non-return girth sheets 8 and non-return step 5, the concrete structure of the sealing device is：Including In 8 downside of non-return girth sheets, rubber washer 10, annular plastics part 11 between rubber washer 10 and lower valve core bar 7, annular modeling are set The lower end of materials and parts 11 have curve be extruded on 10 lower face of rubber washer under turn edge 11a, the outer ring of annular plastics part 11 There is annular convex ring 11b on face, on the internal spherical surface of rubber washer 10 there is indent link slot, annular convex ring 11b to be connected to institute There is axially be arranged vertical to enclose boss 12,10 lower face of rubber washer has sealing in the indent link slot stated, on non-return step 5 It is vertical to enclose 12 resilient abutment of boss in being sealed against ring and the vertical outer ring surface for enclosing boss 12 and be sealed against in ring against ring Anchor ring is tilted against cooperation.

When actual design manufactures, the vertical cross-section of spring 9 is round table-like, and the diameter of spring ring is less than bullet on spring 9 There is on non-return girth sheets 8 diameter of 9 times spring rings of spring spring base 18, the lower spring ring of spring 9 to be located at the spring base 18 On, the purpose being arranged in this way is：The elasticity stable of spring 9 increases service life.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (5)

1. the lower end of a kind of check-valves, including the internal cylinder shape valve with cavity, the cylinder shape valve is water inlet end （1）, upper end be water outlet（2）, there is upper mounting seat at the upper end in the cylinder valve body（3）, there is at lower end lower peace Fill seat（4）, intermediate there is a circle non-return step（5）, the cylinder valve body is interior to have spool, and the spool includes upper valve Core bar（6）, lower valve core bar（7）With non-return girth sheets（8）, the upper valve core bar（6）It is threaded through upper mounting seat（3）On, it is described Lower valve core bar（7）It is threaded through lower mounting seat（4）On, the non-return girth sheets（8）It is resisted against non-return step（5）On, in upper valve core Bar（6）On be arranged with spring（9）, the spring（9）One end be resisted against upper mounting seat（3）On, the other end is resisted against non-return Girth sheets（8）On, which is characterized in that in non-return girth sheets（8）With non-return step（5）Between be provided with sealing device, the sealing Device is included in non-return girth sheets（8）Rubber washer is arranged in downside（10）, the rubber washer（10）And lower valve core bar（7）It Between be equipped with annular plastics part（11）, the annular plastics part（11）Lower end have to curve and be extruded in the rubber washer （10）It turns edge under on lower face（11a）, the annular plastics part（11）Outer annular surface on have annular convex ring（11b）, The rubber washer（10）Internal spherical surface on have indent link slot, the annular convex ring（11b）Described in being connected to In indent link slot, the non-return step（5）It is upper vertical to enclose boss with what is be axially arranged（12）, the rubber washer（10） Lower face, which has, is sealed against ring, described vertical to enclose boss（12）Resilient abutment is in being sealed against ring and this stands and encloses boss（12） Outer ring surface and be sealed against the inner ring surface of ring and tilt against cooperation.

2. a kind of check-valves according to claim 1, which is characterized in that the cylinder shape valve includes upper valve body （13）With upper valve body（13）The lower valve body of threaded connection（14）, the upper mounting seat（3）Positioned at upper valve body（13）It is interior, it is described Non-return step（5）, lower mounting seat（4）It is located at lower valve body（14）Interior, described lower valve body（14）Lower thread connection There is cylindric guard（15）.

3. a kind of check-valves according to claim 2, which is characterized in that the upper mounting seat（3）It is upper that there is upper connection Hole（16）, the upper valve core bar（6）It is threaded through the upper connecting hole（16）In, the lower mounting seat（4）With lower company Connect hole（17）, the lower valve core bar（7）It is threaded through the lower connecting hole（17）In.

4. a kind of check-valves according to claim 3, which is characterized in that the upper connecting hole（16）Bore dia be more than Upper valve core bar（6）Shank diameter, the lower connecting hole（17）Bore dia be more than lower valve core bar（7）Shank diameter.

5. a kind of check-valves according to claim 1 or 2 or 3 or 4, which is characterized in that the spring（9）Vertical cross Section is round table-like, spring（9）The diameter of upper spring ring is less than spring（9）The diameter of lower spring ring, the non-return girth sheets（8） It is upper that there is spring base（18）, the spring（9）Lower spring ring be located at the spring base（18）On.