CN103511657A

CN103511657A - Ball valve

Info

Publication number: CN103511657A
Application number: CN201310523566.8A
Authority: CN
Inventors: 丁城; 王国军; 王建华
Original assignee: Neway Valve Suzhou Co Ltd
Current assignee: Neway Valve Suzhou Co Ltd
Priority date: 2013-10-30
Filing date: 2013-10-30
Publication date: 2014-01-15
Anticipated expiration: 2033-10-30
Also published as: CN103511657B

Abstract

The invention relates to a ball valve which comprises a fixator positioned between a valve ball and a valve body, wherein a first sealing part and a second sealing part are arranged between the fixator and the valve body; the first sealing part is arranged near the fixator; the second sealing part is arranged near the valve body; baffle parts for blocking the first sealing part from moving to the valve body and blocking the second sealing part from moving to the fixator are respectively arranged on the valve body and the fixator. When the inner left side of the ball valve is pressed for the first time, the first sealing part moves rightwards, is blocked by the baffle part on the valve body, and cannot move, the sealing of the fixator and the valve body is realized, and the left side pressure cannot enable the second sealing part to move; When the inner right side of the ball valve is pressed for the first time, the second sealing part moves leftwards, is blocked by the baffle part on the fixator, and cannot move, the sealing of the fixator and the valve body is realized, and the right side pressure cannot enable the first sealing part to move; no matter what the pressure re-entering direction in the ball valve is, the first sealing part and the second sealing part cannot be displaced, and the sealing reliability of the sealing parts is ensured.

Description

Ball valve

Technical field

The present invention relates to valve manufacture technology field, specifically relate to a kind of ball valve.

Background technique

Ball valve is reliable owing to having sealing, and feature simple in structure, easy to maintenance, becomes one of widely used valve.In ball valve, DBB and DIB are two kinds of valve seat functional forms, and wherein, DBB valve seat also claims single piston effect valve seat, and each valve seat can be resisted the active force of a direction, can discharge lumen.DIB valve seat is divided into again DIB-1 valve seat and DIB-2 valve seat, and each valve seat opposing both direction active force of DIB-1 valve seat, claim double-piston effect valve seat, but this structure need arrange lumen pressure-relieving device; The valve seat of DIB-2 entrance point is DBB, and outlet end is DIB, is again single, double piston effect valve seat, this structure pass through the entrance point lumen pressure of automatically releasing.DIB type valve seat, due to favorable sealing property, is widely used in recent years.

Be as shown in Figure 1 the ball valve of disclosed a kind of DIB-2 type in prior art, comprise: valve ball 11, valve body 12, be positioned at the fixture 13 of 12 of valve ball 11 and valve bodies, fixture 13 1 sides are tightly connected by seal ring 14 and

valve ball

11,12 of fixture 13 and valve bodies are provided with spring 16, on fixture 13 opposite sides, also form shoulder, Sealing 15 is located on described shoulder, and fixture 13 is tightly connected by Sealing 15 and valve body 12.In the assembly process of ball valve, valve component (fixture 13+ seal ring 14) first moves to valve body 12 one end, reserve sufficient space and place valve ball 11, as shown in Figure 2, after valve ball 11 is put into, valve component draws close and pushes to valve ball 11 sealing that valve ball 11 is realized 11 of fixture 13 and valve balls again under the effect of the spring-back force of spring 16, so the distance L 2 that moves to valve body one end of the width L1+ valve component of the length L=Sealing of shoulder; In practical work process, as shown in Figure 3, during the entrance pressure of right side, Sealing 15 can be shifted onto its left side along Sealing groove by medium; As shown in Figure 4, during the entrance pressure of left side, Sealing 15 can be shifted onto its right side along Sealing groove by medium.

Because Sealing 15 moves around on fixture 13, produce friction, rubbing surface easily abrades on the one hand, on the other hand, during a side entrance pressure, Sealing 15 is pulled on fixture 13 or valve body 12 end faces and can be clashed into, and the frictional force of interior outer seal lip is when inconsistent, easily cause the non-design ideal state of Sealing 15 physical location state, cause the sealing effect of this ball valve greatly to reduce, sealing stability can not well be guaranteed, this phenomenon has been passed through verification experimental verification.

Summary of the invention

For this reason, technical problem to be solved by this invention is the problem that Sealing moves around and causes sealing effect to reduce on fixture, the present invention, by the structure of Sealing between appropriate design fixture and valve body, to prevent that Sealing from moving, improves the sealing effect of Sealing.

For solving the problems of the technologies described above, a kind of ball valve of the present invention, comprise the fixture being positioned between valve ball and valve body, between described fixture and described valve body, be provided with the first Sealing and the second Sealing, described the first Sealing is near described fixture setting, described the second Sealing, near described valve body setting, is provided for respectively on described valve body and described fixture stopping that described the first Sealing moves, stops to described valve body the barrier portion that described the second Sealing moves to described fixture.

Between described the first Sealing and the stop part of described valve body, be provided with the first block, between described the second Sealing and the stop part of described fixture, be provided with the second block.

Described barrier portion is for taking shape in respectively the second shoulder on the madial wall of the first shoulder on the outer side wall of described fixture and described valve body.

Described the first block is against described the second shoulder and described the second block during against described the first shoulder, and described the first block contacts cooperation with described the second block.

The position of described the first shoulder and described the second shoulder over against, the surface of contact of described the first block and described the second block is plane.

The position of described the first shoulder and described the second shoulder certain distance that staggers, the ladder surface of the surface of contact of described the first block and described the second block for mutually mating.

In the space of described valve body and described fixture, be provided with for limiting the back-up ring of described the first Sealing position, described back-up ring is positioned at a side that approaches described valve ball, and is resisted against on the sidewall of described valve body, between described back-up ring and described fixture, is provided with spring.

Described the first Sealing be with the first stopper and opening towards left energy-storaging spring seal ring, described the second Sealing is towards right energy-storaging spring seal ring with the second stopper and opening.

Technique scheme of the present invention has the following advantages compared to existing technology,

1, ball valve provided by the invention, comprise the fixture being positioned between valve ball and valve body, between fixture and valve body, be provided with the first Sealing and the second Sealing, on valve body and fixture, be provided for respectively stopping that the first Sealing moves right, stops the barrier portion that the second Sealing is moved to the left.In ball valve, left side is for the first time during entrance pressure, the first Sealing moves right under pressure and is no longer moved after the barrier portion barrier on valve body, and realize the sealing between fixture and valve body, and left side pressure can not act on the second Sealing, and left side pressure can not make the second Sealing move; In ball valve, right side is for the first time during entrance pressure, the second Sealing no longer moves after being moved to the left under pressure the barrier portion barrier being fixed on device, and realize the sealing between fixture and valve body, and right atrial pressure can not act on the first Sealing, and right atrial pressure can not make the first Sealing move; After the first Sealing and the second Sealing are all stopped moving by barrier portion barrier, no matter in ball valve again from left side entrance pressure or again from right side entrance pressure, can not make the first Sealing and the second Sealing produce displacement, the first Sealing and the second Sealing also just can not be because friction is impaired repeatedly, guaranteed the sealing reliability of above-mentioned Sealing, above-mentioned sealing configuration is specially adapted to DIB type ball valve.

2, in ball valve of the present invention, between the first Sealing and the stop part of valve body, be provided with the first block, between the second Sealing and the stop part of fixture, be provided with the second block.Barrier portion is for taking shape in respectively the second shoulder on the madial wall of the first shoulder on the outer side wall of fixture and valve body.Particularly, the first Sealing is resisted against on the first block, and the first block is resisted against the second shoulder on the madial wall of valve body, and the second Sealing is resisted against on the second block, the second block against with fixture outer side wall on the first shoulder; So arrange and can prevent that ball valve is in primary entrance pressure process, there is direct collision in the first Sealing and the second Sealing barrier portion respectively and between fixture and valve body, will cause the first Sealing and the second Sealing to tilt and damage, affect sealing effect, and surface of contact between the first block and the first Sealing fits like a glove, during the collision of the first Sealing and the first block, the first Sealing just can not run-off the straight and impaired, has guaranteed the sealing effect of the first Sealing; Same, the surface of contact between the second block and the second Sealing fits like a glove, and when the second Sealing and the second block collide, the second Sealing can run-off the straight and impaired yet, guarantees the sealing effect of the second Sealing.And, because the axial force that the first Sealing bears is born by valve body but not the second Sealing, and the axial force that the second Sealing bears is born by fixture but not the first Sealing, while having avoided the first Sealing and the second Sealing against each other, while causing one-sided entrance pressure, the problem that the Sealing of opposite side moves.

3, in ball valve of the present invention, in order to shorten the length of fixture, the first block is against the second shoulder and the second block during against the first shoulder, and the first block contacts cooperation with the second block.When the position of the first shoulder and the second shoulder over against time, the surface of contact of the first block and the second block is plane, as long as guarantee the first block and identical contact of surface of contact between the second block; In order further to shorten the length of fixture, when certain distance is staggered in the position of the first shoulder and the second shoulder, the first block is the mutual ladder surface mating with the surface of contact of the second block, to guarantee coincideing between the first block and the second block Contact face.

4, in ball valve of the present invention, be provided with for limiting the back-up ring of the first Sealing position in the space of valve body and fixture, back-up ring is positioned at a side that approaches valve ball, and is resisted against on the sidewall of valve body, between back-up ring and fixture, is provided with spring.The first Sealing be with the first stopper and opening towards left energy-storaging spring seal ring, the second Sealing is towards right energy-storaging spring seal ring with the second stopper and opening.The assembly process of valve ball is: first the second Sealing, the second block, the first block, the first Sealing, back-up ring and spring are placed on fixture successively, by frock, fixture is pressed to valve body one end again, the second stopper of the second Sealing can be against valve body, prevent that opening is towards right energy-storaging spring seal ring direct collision valve body, cause lip limit to damage, put into after valve ball, unclamp fixture, fixture compresses valve ball under the rebound effect of spring, in the springback process of fixture, back-up ring is for limiting the position that the first Sealing moves to valve ball direction, long to prevent the displacement distance of the first Sealing on fixture, cause opening directly to depart from valve body towards left energy-storaging spring seal ring, or due to long and frictionally damage the first Sealing of displacement distance, make Sealing cannot play seal action, the first stopper of the first Sealing of the present invention can be against back-up ring when assembling, can not depart from sealing station, therefore further guaranteed the sealing effect of the first Sealing and the second Sealing.

Accompanying drawing explanation

For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein

Fig. 1 is the structural representation of fixture in prior art, Sealing and valve body;

Fig. 2 is the schematic diagram in sealing part works space in ball valve in prior art;

Fig. 3 is the schematic diagram of Sealing position during the entrance pressure of right side in prior art;

Fig. 4 is the schematic diagram of Sealing position during entrance pressure, left side in prior art;

Fig. 5 is ball-valve structure schematic diagram of the present invention;

In figure, reference character is expressed as: 11,51-valve ball, 12,52-valve body, 13,53-fixture, 14-seal ring, 15-Sealing, 16,591-spring, 54-the first Sealing, 541-the first stopper, 542-energy-storaging spring seal ring, 55-the second Sealing, 551-the second stopper, 552-energy-storaging spring seal ring, 56-barrier portion, 561-the first shoulder, 562-the second shoulder, 57-the first block, 58-the second block, 59-back-up ring, the length of L-shoulder, the width of L1-Sealing, the distance that L2-valve component moves to valve body one end.

Embodiment

embodiment 1:

The present embodiment provides a kind of concrete structure of ball valve disclosed by the invention, as shown in Figure 5, comprise the fixture 53 that is positioned at 52 of valve ball 51 and valve bodies, between fixture 53 and valve body 52, be provided with the first Sealing 54 and the second Sealing 55, the first Sealing 54 arranges near fixture 53, the second Sealing 55 arranges near valve body 52, is provided for respectively stopping that the first Sealing 54 moves, stops to valve body 52 the barrier portion 56 that the second Sealing 55 moves to fixture 53 on valve body 52 and fixture 53.

Technique scheme is core technology scheme of the present invention, in ball valve, left side is for the first time during entrance pressure, the first Sealing 54 moves right under pressure and is no longer moved after barrier portion 56 barriers on valve body, and realize the sealing of 52 of fixture 53 and valve bodies, left side pressure can not act on the second Sealing 55, and left side pressure can not make the second Sealing 55 move; In ball valve, right side is for the first time during entrance pressure, the second Sealing 55 no longer moves after being moved to the left under pressure barrier portion 56 barriers that are fixed on device, and realize the sealing of 52 of fixture 53 and valve bodies, right atrial pressure can not act on the first Sealing 54, and right atrial pressure can not make the first Sealing 54 move; After the first Sealing 54 and the second Sealing 55 are all stopped moving by barrier portion 56 barriers, no matter in ball valve again from left side entrance pressure or again from right side entrance pressure, can not make the first Sealing 54 and the second Sealing 55 produce displacement, the first Sealing 54 and the second Sealing 55 just can, because friction is impaired repeatedly, not guarantee the sealing reliability of above-mentioned Sealing yet.

In order to prevent from, between the first Sealing and the second Sealing and barrier portion, direct collision rear-inclined occurs and impaired, in the present embodiment, between the stop part of the first Sealing 54 and valve body 52, be provided with between the stop part of the first block 57, the second Sealings 55 and fixture 53 and be provided with the second block 58.Barrier portion 56 is for taking shape in respectively the second shoulder 562 on the madial wall of the first shoulder 561 on the outer side wall of fixture 53 and valve body 52.Particularly, the first Sealing 54 is resisted against on the first block 57, the second shoulder 562, the second Sealings 55 that the first block 57 is resisted against on the madial wall of valve body 52 are resisted against on the second block 58, the second block 58 against with fixture outer side wall on the first shoulder 561; So arrange and can prevent that ball valve is in primary entrance pressure process, there is direct collision in the first Sealing 54 and the second Sealing 55 barrier portion 56 respectively and between fixture 53 and valve body, will cause the first Sealing 54 and the second Sealing 55 tilt and damage, affect sealing effect, and the surface of contact of 54 of the first block 57 and the first Sealings fits like a glove, when the first Sealing 54 and the collision of the first block 57, the first Sealing 54 just can not run-off the straight and impaired, has guaranteed the sealing effect of the first Sealing 54; Same, the surface of contact that the second block 58 and the second Sealing are 55 fits like a glove, and when the second Sealing 55 and the second block 58 collide, the second Sealing 55 can run-off the straight and impaired yet, guarantees the sealing effect of the second Sealing 55.And, because the axial force that the first Sealing 54 bears is born by valve body 52 but not the second Sealing 55, and the axial force that the second Sealing 55 bears is born by fixture 53 but not the first Sealing 54, while having avoided the first Sealing 54 and the second Sealing 55 against each other, while causing one-sided entrance pressure, the problem that the Sealing of opposite side moves.

In order to shorten the length of fixture, the first block 57 is against the second shoulder 562 and the second block 58 during against the first shoulder 561, and the first block 57 contacts cooperation with the second block 58.In the present embodiment, the first block 57 contacts with the second block 58 and coordinates and the first shoulder 561 and the second shoulder 562 position certain distance that staggers, the first block 57 is preferably the mutual ladder surface mating with the surface of contact of the second block 58, to guarantee identical contact of the

first block

57 and 58 of the second blocks.The surface of contact of certain the first block 57 and the second block 58 can be also other shape of mutually mating, as long as can guarantee identical contact of the

first block

57 and 58 of the second blocks, is not described in detail herein.

For preventing that the first Sealing and the second Sealing can direct collision fixture and valve bodies in assembly process, in valve body 52 and fixture 53 space, be provided with for limiting the back-up ring 59 of the first Sealing 54 positions, back-up ring 59 is positioned at a side that approaches valve ball 51, and be resisted against on the sidewall of valve body 52, between back-up ring 59 and fixture 53, be provided with spring 591.The first Sealing 54 for the first stopper 541 and opening towards left energy-storaging spring seal ring 542, the second Sealings 55 for the second stopper 551 and opening towards right energy-storaging spring seal ring 552.

The assembly process of valve ball is: first the second Sealing 55, the second block 58, the first block 57, the first Sealing 54, back-up ring 59 and spring 591 are placed on fixture 53 successively, by frock, fixture 53 is pressed to valve body 52 one end again, the second stopper 551 of the second Sealing can be against valve body 52, prevent that opening is towards right energy-storaging spring seal ring 552 direct collision valve bodies 52, cause lip limit to damage, put into after valve ball 51, unclamp fixture 53, fixture 53 compresses valve ball 51 under the rebound effect of spring 591, in the springback process of fixture 52, the position that back-up ring 59 moves to valve ball direction for limiting the first Sealing 54, long to prevent the displacement distance of the first Sealing 54 on fixture 53, cause opening directly to depart from valve body 52 towards left energy-storaging spring seal ring, or due to long and frictionally damage the first Sealing 54 of displacement distance, make Sealing cannot play seal action, the first stopper of the first Sealing of the present invention can be against back-up ring when assembling, can not depart from sealing station, therefore guaranteed the sealing effect of the first Sealing 54 and the second Sealing 55.

embodiment 2

The present embodiment and embodiment's 1 structure is basic identical, and distinctive points is:

In the present embodiment the first shoulder 561 and the second shoulder 562 position over against, the surface of contact of the first block 57 and the second block 58 is plane, guarantees that surface of contact between the first block and the second block coincide to contact.This structure can reduce the processing cost of described the first block 57 and the second block 58.

Obviously, above-described embodiment is only for example is clearly described, and the not restriction to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all mode of executions.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.

Claims

1. a ball valve, comprise the fixture (53) being positioned between valve ball (51) and valve body (52), between described fixture (53) and described valve body (52), be provided with the first Sealing (54) and the second Sealing (55), described the first Sealing (54) arranges near described fixture (53), described the second Sealing (55) arranges near described valve body (52), it is characterized in that, on described valve body (52) and described fixture (53), be provided for respectively stopping that described the first Sealing (54) is mobile to described valve body (52), stop that described the second Sealing (55) is to the mobile barrier portion (56) of described fixture (53).

2. ball valve according to claim 1, it is characterized in that: between the stop part of described the first Sealing (54) and described valve body (52), be provided with the first block (57), between the stop part of described the second Sealing (55) and described fixture (53), be provided with the second block (58).

3. ball valve according to claim 1 and 2, is characterized in that: described barrier portion is for taking shape in respectively the second shoulder (562) on the madial wall of the first shoulder (561) on the outer side wall of described fixture (53) and described valve body (52).

4. ball valve according to claim 3, it is characterized in that: described the first block (57) is against described the second shoulder (562) and described the second block (58) during against described the first shoulder (561), and described the first block (57) contacts cooperation with described the second block (58).

5. ball valve according to claim 4, is characterized in that: the position of described the first shoulder (561) and described the second shoulder (562) over against, described the first block (57) is plane with the surface of contact of described the second block (58).

6. ball valve according to claim 4, it is characterized in that: the position of described the first shoulder (561) and described the second shoulder (562) certain distance that staggers, the ladder surface of the surface of contact of described the first block (57) and described the second block (58) for mutually mating.

7. according to the arbitrary described ball valve of claim 1-6, it is characterized in that: in the space of described valve body (52) and described fixture (53), be provided with for limiting the back-up ring (59) of described the first Sealing (54) position, described back-up ring (59) is positioned at a side that approaches described valve ball (51), and be resisted against on the sidewall of described valve body (52), between described back-up ring (59) and described fixture (53), be provided with spring (591).

8. according to the arbitrary described ball valve of claim 1-7, it is characterized in that: described the first Sealing (54) for the first stopper (541) and opening towards left energy-storaging spring seal ring (542), described the second Sealing (55) for the second stopper (551) and opening towards right energy-storaging spring seal ring (552).