CN209494973U - Check-valves in Fluorine-lined plastics - Google Patents

Abstract

The utility model proposes a kind of structure is simple, production cost is low, non-return effect is good and check-valves in small Fluorine-lined plastics is lost in liner assembly, including upper valve body, lower valve body, valve seat, flap, valve shaft, liner assembly, upper valve body is bolted with lower valve body, the second sealing device is provided between upper valve body and lower valve body, upper valve body and lower valve body offer inner cavity, upper valve body offers water outlet, lower valve body offers water inlet, water outlet, water inlet is connected with the inner cavity, limiting device is provided between flap and lower valve body, there is first sealing device between flap and lower valve body, valve shaft lower end is fixedly installed on flap upper surface, valve seat center offers limit hole, valve shaft upper end is arranged in limit hole, valve seat offers water-flowing trough, being provided between the valve seat and flap makes the flap sealing contact at the water inlet Elasticity reset device is provided with for buffering the buffer unit collided between the flap and lower valve body between the valve shaft and valve seat.

Description

Check-valves in Fluorine-lined plastics

Technical field

The utility model relates to field of check valves, in particular to check-valves in Fluorine-lined plastics.

Background technique

Check-valves refers to opening and closing element for round flap and by own wt and pressure medium generation movement to block medium to fall A kind of valve of stream, check-valves belong to a kind of automatic valve, main function be prevent medium from flowing backwards, prevent from pumping and driving it is electronic Machine reversion and vessel media are released, and check-valves can be divided mainly into swing check valve (rotating according to center of gravity) stops with lift Return valve (being moved along axis), Fluorine-lined valve is also known as fluoroplastics lining corrosion resistant valve, be by polyflon (or profile through plus Work) using molding (or inlaying) method be placed in steel or irony valve pressure part inner wall (same method be suitable for it is all kinds of The liner of pressure vessel and pipeline fittings) or valve internals outer surface, utilize its uniqueness in terms of anti-strong corrosive medium It can be made into all kinds of valves and pressure vessel, polytetrafluoroethylene (PTFE) has " cold flow properties ".I.e. material product is in long-time continuous load The lower plastic deformation (creep) occurred of effect, can generate larger touch with valve body when pressure medium crosses ambassador's flap quick-make It hits, is easy to make the liner assembly at flap and valve body collision to generate cold flow properties, so that plastic deformation, which occurs, influences its use, reduce Service life, Fluorine-lined lift check valve only relies on self weight and medium back flow driving flap closure, non-return mostly on the market at present Speed is slow.

Utility model content

Therefore, for above-mentioned problem, that the utility model proposes a kind of structures is simple, production cost is low, and non-return effect is good And check-valves in small Fluorine-lined plastics is lost in liner assembly and sealing ring.

To realize above-mentioned technical problem, the solution that the utility model is taken are as follows: check-valves in Fluorine-lined plastics, including Upper valve body, lower valve body, valve seat, flap, valve shaft, the liner assembly for corrosion-and high-temp-resistant, the upper valve body and lower valve body are logical It crosses and is bolted, the second sealing device is provided between the upper valve body and lower valve body, the upper valve body is offered with lower valve body Inner cavity, the upper valve body offer water outlet, and the lower valve body offers water inlet, the water outlet, water inlet with it is described interior Chamber is connected, and the flap can close the water inlet and be set to the water inlet, is arranged between the flap and lower valve body There is the limiting device for preventing the flap from skidding off the inner cavity, there is the first sealing dress between the flap and the lower valve body It sets, the valve shaft lower end is fixedly installed on the flap upper surface, and the valve seat center offers the limit passed through for the valve shaft Position hole, the valve shaft upper end are arranged in the limit hole, and the valve seat is located at the limit hole side and offers to be led to for fluid The water-flowing trough crossed is provided with the elastic reset dress for making the flap sealing contact at the water inlet between the valve seat and flap It sets, is provided between the valve shaft and valve seat for buffering the buffer unit collided between the flap and lower valve body.

Further improved to be: the buffer unit includes rubber pad, limited block, and the limited block is fixedly installed on described Valve shaft upper end, the rubber pad are fixedly installed on the valve seat, and the limited block can be contradicted with the rubber pad.

Further improved to be: the liner assembly includes the first lining part, the second lining part, third lining part, described First lining part is fixedly installed on the inner wall of the upper valve body, and the second lining part is fixedly installed on the interior of the lower valve body Wall, the third lining part are fixedly installed on the surface of the flap.

Further improved to be: the elasticity reset device is spring, and the spring pocket is set to the valve shaft, the spring Upper end is inconsistent with valve seat, and the lower spring end and the flap are inconsistent.

Further improved to be: the limiting device is retention bead, and the retention bead is fixedly installed on the lower valve Internal wall.

Further improved to be: the first sealing device is the first sealing ring, and first sealing ring surround and is set to The flap lower end surface.

Further improved to be: second sealing device is the second sealing ring, and second sealing ring is set to described Upper valve body and lower valve body adjacent.

By using preceding solution, the beneficial effects of the utility model are: by setting spring realize when stop into After water flap can quick-make, non-return effect is preferable, and by setting cushion buffer flap will be closed water inlet when to valve The impact of internal wall and the second lining part avoids lining part at impact from extending the second lining because cold flow properties bring is plastically deformed The service life of part.

Detailed description of the invention

Fig. 1 is the sectional view of check-valves in the utility model Fluorine-lined plastics.

Fig. 2 is the top view of check-valves in the utility model Fluorine-lined plastics.

Specific embodiment

Now in conjunction with the drawings and specific embodiments, the present invention will be further described.

With reference to Fig. 1, Fig. 2, it is check-valves in Fluorine-lined plastics that the utility model embodiment is revealed, including upper valve body 1, under Valve body 2, valve seat 3, flap 4, valve shaft 5, the liner assembly for corrosion-and high-temp-resistant, the upper valve body 1 pass through spiral shell with lower valve body 2 Bolt 11 connects, and the second sealing ring 12 is provided between the upper valve body 1 and lower valve body 2, second sealing ring 12 is set to institute Upper valve body 1 and 2 adjacent of lower valve body are stated, the upper valve body 1 offers inner cavity with lower valve body 2, and the upper valve body 1 offers water outlet Mouthful, the lower valve body 2 offers water inlet, and the water outlet, water inlet are connected with the inner cavity, and the flap 4 can be closed The water inlet is set to the water inlet, is provided between the flap 4 and lower valve body 2 for preventing the flap 4 sliding The retention bead 21 of the inner cavity out, the retention bead 21 are fixedly installed on 2 inner wall of lower valve body, the flap 4 and institute The first sealing ring 41 having between lower valve body 2 for sealing water inlet is stated, first sealing ring 41 surround and is set to the valve 4 lower end surface of valve, 5 lower end of valve shaft are fixedly installed on 4 upper surface of flap, and 3 center of valve seat is offered for the valve The limit hole 31 that axis 5 passes through, 5 upper end of valve shaft are arranged in the limit hole 31, and the valve seat 3 is located at the limit hole 31 Side offers the water-flowing trough 32 passed through for fluid, and the liner assembly includes the first lining part 61, the second lining part 62, third Lining part 63, the first lining part 61 are fixedly installed on the inner wall of the upper valve body 1, and the second lining part 62 is fixedly installed In the inner wall of the lower valve body 2, the third lining part 63 is fixedly installed on the flap 4 and 5 surface of valve shaft, the valve seat 3 Being provided between flap 4 makes the flap 4 seal the spring 42 for contacting at the water inlet, and the spring 42 is sheathed on described Valve shaft 5,42 upper end of spring and valve seat 3 are inconsistent, and 42 lower end of spring and the flap 4 are inconsistent, the valve shaft 5 with It is provided between valve seat 3 for buffering the buffer unit collided between the flap 4 and lower valve body 2, the buffer unit includes Rubber pad 71, limited block 72, the limited block 72 are fixedly installed on 5 upper end of valve shaft, and the rubber pad 71 is fixedly installed on 3 upper surface of valve seat, the limited block 72 can be contradicted with the rubber pad 71, and when the check valve is closed, the spring 42 pushes away It is close to the retention bead 21 to move the flap 4, when the flap 4 is close to the retention bead 21,5 upper end of valve shaft Limited block 72 and the rubber pad 71 contradict, 2 inner wall of lower valve body and second are served as a contrast when buffering 4 quick-make of flap In part 62 impact.

When check-valves is installed in pipeline connection, it is water outlet at the valve seat 3, is water inlet at the flap 4, when beats When opening pipe switch, water flow flow to water inlet, is acted on by hydraulic pressure, and the flap 4 is extruded towards the valve seat direction, water inlet It opens, water flow passes through, and when closing pipe switch, the flap 4 is by 42 elastic force of spring effect crushing failure at high speed in the limit Position protrusion 21, makes inlet seal, and water can not flow back in pipeline, realizes non-return effect, and buffer institute by the rubber pad 71 The impact for stating 4 that moment of quick-make of flap avoids the second lining part by compared with thump, becomes because its cold flow properties generates plasticity Shape extends the service life of the second lining part.

Based on preceding solution, the rubber pad 71 or buffering sponge.

The basic principles and main features and its advantage of the utility model, the technology people of the industry has been shown and described above Member only illustrates this described in above-described embodiment and explanation it should be appreciated that the present utility model is not limited to the above embodiments The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change And improvement, these various changes and improvements fall within the scope of the claimed invention, the utility model requires protection scope It is defined by the appending claims and its equivalent thereof.

Claims (7)

1. check-valves in Fluorine-lined plastics, including upper valve body, lower valve body, valve seat, flap, valve shaft, for the lining of corrosion-and high-temp-resistant In component, the upper valve body is bolted with lower valve body, and the second sealing dress is provided between the upper valve body and lower valve body It sets, the upper valve body and lower valve body offer inner cavity, and the upper valve body offers water outlet, and the lower valve body is offered into water Mouthful, the water outlet, water inlet are connected with the inner cavity, and the flap can close the water inlet and be set to the water inlet Place, is provided with the limiting device for preventing the flap from skidding off the inner cavity, the flap between the flap and lower valve body There is first sealing device between the lower valve body, the valve shaft lower end is fixedly installed on the flap upper surface, the valve seat Center offers the limit hole passed through for the valve shaft, and the valve shaft upper end is arranged in the limit hole, and the valve seat is located at The limit hole side offers the water-flowing trough passed through for fluid, it is characterised in that: being provided between the valve seat and flap makes The flap sealing contacts at the elasticity reset device of the water inlet, is provided between the valve shaft and valve seat for buffering State the buffer unit collided between flap and lower valve body.

2. check-valves in Fluorine-lined plastics according to claim 1, it is characterised in that: the buffer unit include rubber pad, Limited block, the limited block are fixedly installed on the valve shaft upper end, and the rubber pad is fixedly installed on the valve seat, described Limited block can be contradicted with the rubber pad.

3. check-valves in Fluorine-lined plastics according to claim 1, it is characterised in that: the liner assembly includes the first lining Part, the second lining part, third lining part, the first lining part are fixedly installed on the inner wall of the upper valve body, second lining In part be fixedly installed on the inner wall of the lower valve body, the third lining part is fixedly installed on the surface of the flap.

4. check-valves in Fluorine-lined plastics according to claim 1, it is characterised in that: the elasticity reset device is spring, The spring pocket is set to the valve shaft, and the spring upper end and valve seat are inconsistent, and the lower spring end and the flap are inconsistent.

5. check-valves in Fluorine-lined plastics according to claim 1, it is characterised in that: the limiting device is retention bead, The retention bead is fixedly installed on the lower valve body inner wall.

6. check-valves in Fluorine-lined plastics according to claim 1, it is characterised in that: the first sealing device is first close Seal, first sealing ring surround and are set to the flap lower end surface.

7. check-valves in Fluorine-lined plastics according to claim 3, it is characterised in that: second sealing device is second close Seal, second sealing ring are set to the upper valve body and lower valve body adjacent.