CN208885996U - Soft sealing butterfly valve - Google Patents

Abstract

The utility model discloses a kind of soft sealing butterfly valves, it include valve body, valve rod and valve board assembly, the valve rod rotation is threaded through on valve body, the valve body includes fluid channel, the fluid channel includes inlet and outlet, the valve board assembly is located in fluid channel and is connected with valve rod composition, the inner wall of valve board assembly and fluid channel constitutes sealed set, the valve board assembly includes valve plate and pressing plate, the pressing plate is fixed on the valve plate, it is provided on the circumferential surface of the pressing plate along its circumferential equally distributed reinforcement block, the first sealing ring is arranged on the circumferential surface of the pressing plate, the first groove that grafting setting is constituted with the reinforcement block is provided on the inner wall of first sealing ring, the circumferential surface of first sealing ring abuts composition sealing cooperation with the inner wall of fluid channel.The utility model provides a kind of more preferable than prior art sealing performance, the wider array of soft sealing butterfly valve of application range.

Description

Soft sealing butterfly valve

Technical field

The utility model belongs to butterfly valve seal technical field, especially a kind of soft sealing butterfly valve.

Background technique

Butterfly valve is called flap valve, is a kind of simple regulating valve of structure, can be used for the switch control of low pressure pipeline medium Butterfly valve refers to that closure member (valve board assembly) is disk, and a kind of valve of open and close is reached around valve shaft rotation.Butterfly valve is in reality Also his advantage small in size, light-weight has been played in the use of border, but has been used in complicated fluid environment, and there is also one for butterfly valve Fixed defect.Butterfly valve seal is easy hair usually using hard sealing or soft seal, using between valve board assembly and valve body when hard sealing Raw abrasion, causes leakage accident so as to cause seal failure, therefore just must entirely replace valve body or valve board assembly, causes resource Waste.It is by being sealed cooperation between the sealing ring and valve body on valve board assembly to realize resistance when using soft seal The purpose of stream, although wear problem can be improved compared to hard sealing using soft seal, since leakproofness is easy by fluid The influence of pressure is that the soft sealing face of script will be made to leak when Fluid pressure is excessive, so as to cause occurring to leak thing Therefore.

Summary of the invention

It is a kind of more preferable than prior art sealing performance that in order to overcome the deficiencies of the prior art, the utility model provides, answers With the wider array of soft sealing butterfly valve of range.

To achieve the goals above, the technical solution adopted in the utility model is: a kind of soft sealing butterfly valve includes valve Body, valve rod and valve board assembly, the valve rod rotation are threaded through on valve body, and the valve body includes fluid channel, the fluid channel Including inlet and outlet, the valve board assembly is located in fluid channel and is connected with valve rod composition, valve board assembly and fluid The inner wall in channel constitutes sealed set, and the valve board assembly includes valve plate and pressing plate, and the pressing plate is fixed on the valve plate downward On the end face at fluid channel inlet end, pressing plate is annular in shape, and a convex block is provided on valve plate end face, and pressing plate is set on convex block and leads to It crosses bolt or screw is fixed on valve plate, be provided on the circumferential surface of the pressing plate along its circumferential equally distributed reinforcement block, it is described It is arranged with the first sealing ring on the circumferential surface of pressing plate, is provided on the inner wall of first sealing ring and constitutes grafting with the reinforcement block The first groove being arranged, the circumferential surface of the first sealing ring abut composition sealing cooperation with the inner wall of fluid channel.

It using the above scheme, include valve plate, pressing plate on valve board assembly, the pressing plate is fixed on the valve plate, and first is close After the first groove in seal is plugged on reinforcement block, sealing ring is bonded with the circumferential surface of pressing plate, passes through pressing plate outer wall On reinforcement block the inside of the sealing ring of script is reinforced, can sealing ring be passed through when Fluid pressure is excessive Reinforcement block reinforce sealing ring ability of anti-deformation so that sealing ring be able to maintain it is indeformable, thus guarantee and valve body between sealing Performance solves the problems, such as that soft seal sealing performance when pressure is excessive reduces, considerably increases the use scope of butterfly valve.For a long time Certain abrasion, which occurs, using rear sealing ring surface can also replace sealing ring by individually dismantling pressing plate, not need valve Board group part whole dismounting, improves work efficiency, maintenance is more convenient.

As the further setting of the utility model, transmission mechanism is provided between the valve plate and the valve rod, it is described Transmission mechanism includes the transmission gear being set on valve rod and the gear ring that is set on transmission gear, the transmission gear It is provided on the outer peripheral surface of one end and constitutes rodent part along its circumferentially distributed teeth, the other end is outward extended with for fixing with valve rod The interconnecting piece of connection, rodent part and the gear ring of transmission gear are engaged, the company of being wholely set on the outer wall of the gear ring Spindle, the connecting shaft is provided with the second groove on corresponding two sidewalls, is provided with limited block in second groove, described The first compressed spring that driving limited block stretches out the second groove, the first compression are provided between limited block and the bottom surface of the second groove Spring is provided with the connection plugged for connecting shaft on the valve plate respectively with the bottom surface of limited block, the second groove in being fixedly installed Hole is provided on the inner wall of the connecting hole after connecting shaft insertion connecting hole for constituting the limit of grafting setting with limited block Slot can contradict under the elastic reaction of the first compressed spring with the bottom surface of limiting slot, the limit when limited block is inserted into limiting slot Being provided with limited block when extracting from connecting shaft convenient for valve plate on the side wall of position block or limiting slot can be to the second groove contract First guiding surface is provided with when being inserted into connecting hole convenient for connecting shaft limited block on the limited block to the second groove contract Second guiding surface.

Using the above scheme, it is provided with driving limited block between limited block and the bottom surface of the second groove and stretches out the second groove First compressed spring and be provided on the side wall of connecting hole connecting shaft insertion connecting hole after be used for and limited block constitute grafting The limiting slot of setting can make connecting shaft preferably be plugged in connecting hole, pass through the grafting between limited block and limiting slot Cooperation can prevent connecting shaft from deviating from from connecting hole, and the first compressed spring is respectively with the bottom surface of limited block, the second groove in solid Fixed setting, is also possible to prevent limited block and deviates from from the second groove, the first guiding surface can be pulled out from connecting shaft in order to valve plate Limited block can be to the second groove contract, so that can be very easily by valve plate from connection when valve plate needs to dismantle when out It is extracted on axis, limited block is to the second groove contract when the second guiding surface packs into connecting shaft convenient for connecting hole, in this way Setting thus facilitates valve plate to remove from connecting shaft so that formed dismountable mating between connecting hole and connecting shaft. Under connecting hole and connecting shaft connection status, the transmission gear interconnecting piece being fixedly connected with valve rod is driven when valve rod rotation, thus So that the rodent part of transmission gear rotates, kinetic energy is then transmitted to by connecting shaft by engaging between rodent part and gear ring On, valve plate is rotated with the rotation of valve rod, realizes opening or closing for valve.Can pass through when valve plate needs to dismantle by Valve plate is extracted from connecting shaft, convenient for daily maintenance, and sealing ring when maintenance on replacement valve board assembly.

As the further setting of the utility model, the side wall of the limited block is provided with third groove, and the third is recessed It is provided with telescopic block in slot, is contradicted between one end and third groove floor of the telescopic block and is provided with the second compressed spring, institute The other end for stating telescopic block, which is extended, highlight bar, and second groove, which is located on the inner wall of notch, is provided with fixture block, described Highlight bar and fixture block constitute the limit for preventing limited block from deviating from from the second groove and cooperate.

Using the above scheme, when limited block enter the second groove during, it is recessed that the telescopic block is first squeezed into third In slot, so that limited block enters the telescopic block after the second groove in its third groove under the action of by the second compressed spring Stretched out to outside third groove and limited block simultaneously by the first compressed spring under the action of, the protrusion in telescopic block can be made Bar is contradicted with the fixture block that the second groove pocket side wall is arranged in be cooperated, and limited block middle abjection out of second groove is prevented.

As the further setting of the utility model, through-hole, the side of the valve rod are provided on the side wall of the interconnecting piece It is provided with the threaded hole through valve rod on wall, is bolted to connection between the interconnecting piece and valve rod.

Using the above scheme, facilitate the fixation between interconnecting piece and valve rod, so that the connection of valve rod and transmission gear is more Stablize.

As the further setting of the utility model, the second sealing ring is provided between the pressing plate and valve plate.

Using the above scheme, the leakproofness between valve board assembly and valve body is further increased.

As the further setting of the utility model, third sealing ring is embedded on the side wall of the valve plate.

Using the above scheme, the leakproofness between valve board assembly and valve body is further increased.

As the further setting of the utility model, first sealing ring is star-like sealing ring.

Using the above scheme, star-like sealing ring have better elastic packing performance, in the case where pressure becomes larger its with The contact area of fluid inner wall is continuously increased, and ensure that has good leakproofness under high pressure conditions.

The utility model is further described with reference to the accompanying drawing.

Detailed description of the invention

Attached drawing 1 is the utility model specific embodiment structural schematic diagram；

Attached drawing 2 is the structural schematic diagram of pressing plate in the utility model specific embodiment；

Attached drawing 3 is the partial sectional view of A-A in Fig. 1；

Attached drawing 4 is the enlarged drawing in the portion B in Fig. 1；

Attached drawing 5 is the enlarged drawing in the portion C in Fig. 1.

Specific embodiment

Specific embodiment of the utility model is as shown in Figs. 1-5, a kind of soft sealing butterfly valve, includes valve body 1,2 and of valve rod Valve board assembly 3, the rotation of valve rod 2 are threaded through on valve body 1, and the valve body 1 includes fluid channel 11, and the fluid channel 11 wraps Import 11a and outlet 11b are included, the valve board assembly 3 is located in fluid channel 11 and is connected with the composition of valve rod 2, valve plate group The inner wall of part 3 and fluid channel 11 constitutes sealed set, it is characterised in that: and the valve board assembly 3 includes valve plate 31 and pressing plate 32, The pressing plate 32 is fixed on the valve plate 31, is provided on the circumferential surface of the pressing plate 32 along its circumferential equally distributed reinforcement block 321, be arranged with the first sealing ring 4 on the circumferential surface of the pressing plate 32, be provided on the inner wall of first sealing ring 4 with it is described plus Strong block 321 constitutes the first groove 41 of grafting setting, and it is close that the circumferential surface of the first sealing ring 4 abuts composition with the inner wall of fluid channel 11 Envelope cooperation.

In the present embodiment, transmission mechanism 5 is provided between the valve plate 31 and the valve rod 2, the transmission mechanism 5 wraps The transmission gear 51 being set on valve rod 2 and the gear ring being set on transmission gear 51 52 are included, the transmission gear 51 Be provided on the outer peripheral surface of one end and constitute rodent part 511 along its circumferentially distributed teeth 5111, the other end be outward extended with for The interconnecting piece 512 that valve rod 2 is fixedly connected, rodent part 511 and the gear ring 52 of transmission gear 51 are engaged, gear ring 52 it is interior It is provided with the tooth socket 521 for engaging with teeth 5111 on wall, has been wholely set connecting shaft on the outer wall of the gear ring 52 522, the second groove 5221 is provided on the corresponding two sidewalls of the connecting shaft 522, is provided in second groove 5221 Limited block 53 is provided with driving limited block 53 and stretches out the second groove between the limited block 53 and the bottom surface of the second groove 5221 5221 the first compressed spring 54 is provided with the connecting hole 311 plugged for connecting shaft 522, the connecting hole on the valve plate 31 Connecting shaft 522 is provided on 311 inner wall to be inserted into after connecting hole 311 for constituting the limiting slot of grafting setting with limited block 53 3111, limit when extracting from connecting shaft 522 convenient for valve plate 31 is provided on the side wall of the limited block 53 or limiting slot 3111 Block 53 understands the first guiding surface 531 to 5221 contract of the second groove, is provided on the limited block 53 convenient for connecting shaft 522 Second guiding surface 532 of the limited block 53 to 5221 contract of the second groove when being inserted into connecting hole 311.

In the present embodiment, the side wall of the limited block 53 is provided with third groove 533, sets in the third groove 533 It is equipped with telescopic block 55, is contradicted between 533 bottom surface of one end and third groove of the telescopic block 55 and is provided with the second compressed spring 56, The other end of the telescopic block 55, which is extended, highlight bar 551, and second groove 5221, which is located on the inner wall of notch, to be arranged There is fixture block 52211, the highlight bar 551 constitutes the limit for preventing limited block 53 from deviating from from the second groove 5221 with fixture block 52211 Position cooperation.

In the present embodiment, it is provided with through-hole on the side wall of the interconnecting piece 512, is provided on the side wall of the valve rod 2 Through the threaded hole of valve rod 2, it is fixedly connected between the interconnecting piece 512 and valve rod 2 by bolt 5121.

In the present embodiment, the second sealing ring 6 is provided between the pressing plate 32 and valve plate 31.

In the present embodiment, third sealing ring 7 is embedded on the circumferential surface of the valve plate 31.

In the present embodiment, first sealing ring 4 is star-like sealing ring.

The utility model is not limited to above-mentioned specific embodiment, and persons skilled in the art are according to the utility model public affairs The content opened can be implemented the utility model or all using the utility model using other a variety of specific embodiments Design structure and thinking, do simple change or change, both fall within the protection scope of the utility model.

Claims (5)

1. a kind of soft sealing butterfly valve includes valve body, valve rod and valve board assembly, the valve rod rotation is threaded through on valve body, described Valve body includes fluid channel, and the fluid channel includes inlet and outlet, and the valve board assembly is located in fluid channel and and valve Bar composition is connected, and the inner wall of valve board assembly and fluid channel constitutes sealed set, it is characterised in that: the valve board assembly packet Valve plate and pressing plate are included, the pressing plate is fixed on the valve plate, is provided on the circumferential surface of the pressing plate and is uniformly distributed along its circumferential direction Reinforcement block, be arranged with the first sealing ring on the circumferential surface of the pressing plate, be provided on the inner wall of first sealing ring with it is described Reinforcement block constitutes the first groove of grafting setting, and the circumferential surface of the first sealing ring abuts composition sealing with the inner wall of fluid channel and matches It closes.

2. soft sealing butterfly valve according to claim 1, it is characterised in that: be provided with biography between the valve plate and the valve rod Motivation structure, the transmission mechanism include the transmission gear being set on valve rod and the gear ring that is set on transmission gear, institute It states to be provided on one end outer peripheral surface of transmission gear and constitutes rodent part along its circumferentially distributed teeth, the other end extends outwardly useful In the interconnecting piece being fixedly connected with valve rod, rodent part and the gear ring of transmission gear are engaged, on the outer wall of the gear ring Connecting shaft has been wholely set it, the connecting shaft is provided with the second groove, setting in second groove on corresponding two sidewalls There is limited block, the first compression that driving limited block stretches out the second groove is provided between the limited block and the bottom surface of the second groove Spring is provided with the connecting hole plugged for connecting shaft on the valve plate, and connecting shaft insertion is provided on the inner wall of the connecting hole It is provided with and is convenient on the side wall of limiting slot after connecting hole for being arranged with limited block composition grafting, the limited block or limiting slot Limited block can be provided on the limited block to the first guiding surface of the second groove contract when valve plate is extracted from connecting shaft Second guiding surface of the limited block to the second groove contract when being inserted into connecting hole convenient for connecting shaft.

3. according to claim 1 or soft sealing butterfly valve described in 2, it is characterised in that: be provided between the pressing plate and valve plate Two sealing rings.

4. soft sealing butterfly valve according to claim 3, it is characterised in that: be embedded with third sealing on the circumferential surface of the valve plate Circle.

5. soft sealing butterfly valve according to claim 1, it is characterised in that: first sealing ring is star-like sealing ring.