CN214093085U

CN214093085U - Double-sealing triple-eccentric hard sealing butterfly valve

Info

Publication number: CN214093085U
Application number: CN202023224469.3U
Authority: CN
Inventors: 张贤新
Original assignee: Wenzhou Tianke Valve Co ltd
Current assignee: Wenzhou Tianke Valve Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-31
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a double sealing's three eccentric butterfly valves sealed firmly, valve rod periphery cover be equipped with rotary gear, be provided with in the horizontal passage with rotary gear engaged with straight-teeth gear, the straight-teeth gear is arranged along the horizontal passage direction, be provided with on the straight-teeth gear with straight-teeth gear synchronous movement's movable block, one side that the relative straight-teeth gear of horizontal passage was located is fitted with a contraceptive ring and is provided with in movable block looks adaptation, the cooperation circles the contact surface that has with the movable block contact, the cooperation circles and is provided with the through-hole that supplies the medium circulation, the one end of through-hole is located and the contact surface, the other end of through-hole extends to the adjacent side of contact surface, the movable block removes at the contact surface. The utility model provides a double seal's triple offset butterfly valve sealed firmly.

Description

Double-sealing triple-eccentric hard sealing butterfly valve

Technical Field

The utility model relates to a butterfly valve, concretely relates to double seal's triple offset butterfly valve sealed firmly.

Background

The three-eccentric hard seal butterfly valve is an eccentric metal seal structure, the seal form is metal-to-metal seal, the three-eccentric hard seal butterfly valve comprises a valve body, a valve rod, a valve plate and a sealing element, the valve body is provided with a horizontal channel for a medium to pass through, the valve rod vertically penetrates through the valve body and is rotatably connected to the valve body, the valve plate is fixed on the valve rod and synchronously rotates with the valve rod, the valve plate is positioned at the horizontal channel and is matched with the horizontal channel, the sealing element is fixed at the inner side of the horizontal channel and is an oblique conical surface, the sealing element is matched with the valve plate to seal the horizontal channel, three eccentricities of the three-eccentric hard seal butterfly valve are respectively one side of the valve rod deviating from the edge of the valve plate, the central line of the valve rod deviating from the center of the valve body, and the conical axis of the sealing element deviates from the cylindrical axis of the body.

Due to the structural principle of the triple-eccentric hard seal butterfly valve, when a medium is in a positive flow, the inclined conical surface of the sealing element tends to be attached to the valve plate, so that the pressure of the medium on the valve plate is higher, the contact between the sealing element and the valve plate is tighter, the sealing effect is better, when the medium is in a reverse flow, the inclined conical surface of the sealing element tends to leave the valve plate, so that the sealing element cannot provide supporting force for the valve plate, when the pressure of the medium on the valve plate is higher than the torque of the valve rod, leakage can be caused, and the sealing performance is greatly reduced.

Disclosure of Invention

To the not enough of prior art existence, the utility model aims to provide a double seal's three eccentric butterfly valves sealed firmly.

In order to achieve the above purpose, the utility model provides a following technical scheme: the valve body is provided with a horizontal channel for a medium to pass through, the valve rod vertically penetrates through the valve body and is connected to the valve body in a rotating mode, the valve plate is fixed on the valve rod and rotates synchronously with the valve rod, the driving mechanism drives the valve rod to rotate, the valve plate is arranged at the horizontal channel and is matched with the horizontal channel, the sealing element is fixed on the inner side of the horizontal channel, one side of the sealing element is an oblique conical surface, the sealing element is matched with the valve plate to seal the horizontal channel, a rotating gear is sleeved on the periphery of the valve rod, a straight gear meshed with the rotating gear is arranged in the horizontal channel and is arranged along the direction of the horizontal channel, a moving block synchronously moving with the straight gear is arranged on the straight gear, a matching ring matched with the moving block in a matching mode is annularly arranged on one side, where the horizontal channel is located, and a contact surface with the moving block is arranged on the matching ring, the matching ring is provided with a through hole for medium circulation, one end of the through hole is positioned on the contact surface, the other end of the through hole extends to the adjacent side surface of the contact surface, the moving block moves on the contact surface, so that the horizontal channel has a sealing state and a circulation state, the sealing state is that the two ends of the through hole are positioned on one side of the moving block, the horizontal channel is in the sealing state, the circulation state is that the two ends of the through hole are positioned on the two sides of the moving block, the medium flows through the matching ring from the through hole, and the horizontal channel is in an opening state.

By adopting the technical scheme, when the horizontal channel is required to be opened, the driving mechanism drives the valve rod to rotate, the valve rod drives the valve plate to rotate, so that the horizontal channel is not closed by the valve plate, meanwhile, the valve rod drives the rotating gear to rotate, so that the straight gear is driven to move, the movable block moves towards the direction far away from the valve plate, so that one side of the through hole moves to the other side, the two ends of the through hole are positioned at the two sides of the moving end, a medium flows through the matching ring from the through hole, otherwise, when the butterfly valve is required to be closed, the valve rod rotates, so that the valve plate is attached to the sealing member, the horizontal channel is closed, meanwhile, the movable block moves along the contact surface, so that the two ends of the through hole are positioned at one side of the movable block, the reverse side is better when only the medium flows through the front due to the structural limitation of the three-eccentric hard sealing butterfly valve, and the sealing performance of the butterfly valve is limited when the medium flows, so that the movable block is arranged at one side of the butterfly valve, through the double sealing of valve plate and movable block to horizontal passage, great reinforcing the leakproofness of butterfly valve, the power supply of movable block comes from the valve rod simultaneously to need not to increase extra equipment again, reduced the cost of butterfly valve.

The utility model discloses further set up to: the telescopic link is arranged in the spring groove and arranged along the direction close to and far away from the arc groove, the telescopic link is provided with an arc end matched with the arc groove, the spring is compressed between the telescopic link and the spring groove, and the telescopic link has a fixed state in the arc groove and an extension state outside the arc groove.

By adopting the technical scheme, when the matching ring and the moving block are mutually attached, the spring drives the telescopic rod to move outside the spring groove, namely the telescopic rod moves into the arc-shaped groove to fix the matching ring and the moving block, when the driving mechanism drives the matching ring and the moving block to open the horizontal channel, the telescopic rod moves out of the arc-shaped groove and loses the fixing effect on the matching ring and the moving block, the matching ring and the moving block are converted into an open state, when the horizontal channel needs to be closed, the matching ring and the moving block rotate to the original positions, in the process, the telescopic rod abuts against the matching ring, then the telescopic rod is pressed into the spring groove until the telescopic rod corresponds to the corresponding arc-shaped groove, the telescopic rod extends out, the fixing of the matching ring and the moving block is completed through the elastic mechanism, so that no gap is generated between the matching ring and the moving block under the impact of a medium, and good sealing performance is kept, under the drive of drive mechanism, because drive power is greater than the impact of medium far away, is greater than the fixed power of telescopic link simultaneously, so cooperation circle and movable block can open each other.

The utility model discloses further set up to: the outer surface of the sealing element is in a secondary step shape, and the outer surface of the valve plate is matched with the outer surface of the sealing element.

Through adopting above-mentioned technical scheme, set up the contact surface of sealing member and valve plate into the secondary echelonment, can increase the area of contact of sealing member, and then increased the leakproofness of butterfly valve.

The utility model discloses further set up to: and a shell is arranged outside the rotating gear and the straight gear, and the rotating gear and the straight gear are isolated from the horizontal channel by the shell.

Through adopting above-mentioned technical scheme, set up the shell for rotary gear and straight-tooth gear, prevent that rotary gear and straight-tooth gear from directly exposing under the medium, make rotary gear and straight-tooth gear corroded or oxidation by the medium, and then influence the transmission effect between the gear, finally influence the leakproofness of butterfly valve.

The utility model discloses further set up to: the driving mechanism comprises a first closed chamber and a second closed chamber, a guide sleeve and a guide sleeve synchronously rotate with the valve rod are sleeved at the end part of the valve rod, the first closed chamber and the second closed chamber are respectively positioned at two sides of the valve rod, cavities are respectively arranged in the first closed chamber and the second closed chamber, a moving member matched with the cavity and a moving track for the moving member to move are arranged in each cavity, a moving rod is arranged between the two moving members, the moving rod is positioned at a position vertical to the valve rod, a moving ring for the moving of a pin is arranged on the guide sleeve, the pin penetrates through the moving rod and the moving ring, the pin is fixed on the moving rod and can move along the moving ring, and an air vent connected with an air source is arranged at the other end of the moving rod relative to the first closed chamber and the second closed chamber.

By adopting the technical scheme, when the valve plate needs to be driven to rotate, the air is pressed into the cavity through the air vent, and then the moving piece in the first closed chamber is pushed to move along the moving track, the moving rod moves to the second closed chamber, the pin on the moving rod also moves in the moving ring to drive the moving ring to rotate, the guide sleeve also rotates to rotate the valve rod to drive the valve plate, when the valve plate needs to be rotated back, the moving rod can be driven to move reversely by pressing other parts into the second closed chamber, and finally the valve plate is returned to the original position, the valve rod is driven to rotate by the driving action of the first closed chamber and the second closed chamber on the two sides of the valve rod on the movable rod, the driving mechanism has the advantages of enabling the rotation of the valve rod to be more stable and simultaneously having larger torque, while having a greater torque on the valve stem means a better sealing between the seal and the valve plate.

Drawings

FIG. 1 is a perspective view of the whole body of the present invention;

fig. 2 is an overall front view of the present invention;

FIG. 3 is a cross-sectional view B-B of the present invention;

fig. 4 is a side view of the utility model in its entirety;

FIG. 5 is a cross-sectional view A-A of the present invention;

fig. 6 is a partial enlarged view D of the present invention;

fig. 7 is a perspective view of the present invention with the valve body and the driving mechanism removed as a whole;

FIG. 8 is a perspective view of the drive mechanism of the present invention with the first enclosure and the second enclosure removed;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-8, the utility model discloses a double-sealed triple-eccentric hard seal butterfly valve, which comprises a valve body 1, a valve rod 2, a valve plate 3, a driving mechanism 5 and a sealing element 4, wherein the valve body 1 is provided with a horizontal channel 6 for medium to pass through, the valve rod 2 vertically passes through the valve body 1 and is rotatably connected with the valve body 1, the valve plate 3 is fixed on the valve rod 2 and rotates synchronously with the valve rod 2, the driving mechanism 5 drives the valve rod 2 to rotate, the valve plate 3 is positioned at the horizontal channel 6 and the valve plate 3 is matched with the horizontal channel 6, the sealing element 4 is fixed at the inner side of the horizontal channel 6 and one side of the sealing element 4 is an oblique cone, the sealing element 4 is matched with the valve plate 3 to seal the horizontal channel 6, the outer periphery of the valve rod 2 is sleeved with a rotary gear 7, a straight gear 71 meshed with the rotary gear 7 is arranged in the horizontal channel 6, the straight gear 71 is arranged along the direction of the horizontal channel 6, a moving block 72 synchronously moving with the straight gear 71 is arranged on the straight gear 71, a matching ring 73 matched with the moving block 72 is annularly arranged on one side of the horizontal channel 6, which is opposite to the straight gear 71, the matching ring 73 is provided with a contact surface 731 contacted with the moving block 72, a through hole 732 for medium to circulate is arranged on the matching ring 73, one end of the through hole 732 is positioned on the contact surface 731, the other end of the through hole 732 extends to the adjacent side surface of the contact surface 731, the moving block 72 moves on the contact surface 731, so that the horizontal channel 6 has a sealing state and a circulating state, the sealing state is that two ends of the through hole 732 are positioned on one side of the moving block 72, the horizontal channel 6 is in a sealing state, two ends of the through hole 732 are positioned on two sides of the moving block 72, the medium flows through the matching ring 73 from the through hole 732, the horizontal channel 6 is in an opening state, when the horizontal channel 6 is required to be opened, the driving mechanism 5 drives the valve rod 2 to rotate, the valve plate 3 is driven by the valve rod 2 to rotate, so that the valve plate 3 does not close the horizontal channel 6 any more, meanwhile, the valve rod 2 rotates to drive the rotary gear 7 to rotate so as to drive the straight gear 71 to move, the moving block 72 moves towards the direction far away from the valve plate 3, so that one side of the through hole 732 moves to the other side, two ends of the through hole 732 are positioned at two sides of the moving end, a medium flows through the matching ring 73 from the through hole 732, otherwise, when the butterfly valve needs to be closed, the valve rod 2 rotates to enable the valve plate 3 to be attached to a sealing piece to seal the horizontal channel 6, meanwhile, the moving block 72 moves along the contact surface 731 by the rotation of the valve rod 2 to enable two ends of the through hole 732 to be positioned at one side of the moving block 72, the sealing performance is better when only the front side of the medium flows due to the structural limitation of the three-eccentric hard sealing butterfly valve, the sealing performance of the butterfly valve is limited when the back side of the medium flows, so that the moving block 72 is arranged at one side of the butterfly valve plate 3, and the double sealing of the horizontal channel 6 is realized by the valve plate 3 and the moving block 72, and the sealing performance of the butterfly valve is greatly enhanced, meanwhile, the power source of the moving block 72 comes from the valve rod 2, no additional equipment is needed, and the cost of the butterfly valve is reduced.

A telescopic rod 741 and a spring 742 are further arranged between the moving block 72 and the matching ring 73, an arc-shaped groove 743 is arranged on the matching ring 73, a spring slot 744 opposite to the arc-shaped groove 743 is arranged on the moving block 72, the telescopic rod 741 is arranged in the spring slot 744 and is arranged in a direction close to and far away from the arc-shaped groove 743, the telescopic rod 741 has an arc-shaped end 7411 matched with the arc-shaped groove 743, the spring 742 is compressed between the telescopic rod 741 and the spring slot 744, the telescopic rod 741 has a fixed state in the arc-shaped groove 743 and an extended state in which the telescopic rod 741 is outside the arc-shaped groove 743, when the matching ring 73 and the moving block 72 are mutually attached, the spring 742 drives the telescopic rod 741 to move out of the spring slot 744, namely, the telescopic rod 741 moves into the arc-shaped groove 743, so that the matching ring 73 and the moving block 72 are mutually fixed, the telescopic rod 741 is moved out of the arc-shaped groove 743, the fixing effect on the matching ring 73 and the moving block 72 is lost, the matching ring 73 and the moving block 72 are turned into an open state, when the horizontal channel 6 needs to be closed, the matching ring 73 and the moving block 72 rotate to the original positions, in the process, the telescopic rod 741 abuts against the matching ring 73, then the telescopic rod 741 is pressed into the spring groove 744 until the telescopic rod 741 corresponds to the corresponding arc-shaped groove 743, the telescopic rod 741 extends out, the fixing of the matching ring 73 and the moving block 72 is completed through the elastic mechanism, so that no gap still exists between the matching ring 73 and the moving block 72 under the impact of a medium, good sealing performance is maintained, and under the driving of the driving mechanism 5, as the driving force is far greater than the impact of the medium and simultaneously greater than the fixing force of the telescopic rod 741, the matching ring 73 and the moving block 72 can be opened mutually.

The outer surface of the sealing element 4 is in a secondary step shape, the outer surface of the valve plate 3 is matched with the outer surface of the sealing element 4, the contact surface of the sealing element 4 and the valve plate 3 is in the secondary step shape, the contact area of the sealing element 4 can be increased, and the sealing performance of the butterfly valve is further improved.

The outer side of the rotary gear 7 and the outer side of the straight gear 71 are provided with a shell, the rotary gear 7 and the straight gear 71 are isolated from the horizontal channel 6 by the shell, the shell is arranged for the rotary gear 7 and the straight gear 71, the rotary gear 7 and the straight gear 71 are prevented from being directly exposed to a medium, the rotary gear 7 and the straight gear 71 are prevented from being corroded or oxidized by the medium, the transmission effect between the gears is further influenced, and finally the sealing performance of a butterfly valve is influenced.

The driving mechanism 5 comprises a first closed chamber 52 and a second closed chamber 53, a guide sleeve 54 is sleeved on the end of the valve rod 2, the guide sleeve 54 and the valve rod 2 rotate synchronously, the first closed chamber 52 and the second closed chamber 53 are respectively positioned on two sides of the valve rod 2, the first closed chamber 52 and the second closed chamber 53 are respectively provided with a cavity 55, each cavity 55 is internally provided with a moving member 56 matched with the cavity 55 and a moving track 57 for moving the moving member 56, a moving rod 58 is arranged between the two moving members 56, the moving rod 58 is positioned at a position vertical to the valve rod 2, the guide sleeve 54 is provided with a moving ring 59 for moving a pin 591, the pin 591 penetrates through the moving rod 58 and the moving ring 59, the pin 591 is fixed on the moving rod 58 and can move along the moving ring 59, the other end of the moving rod 58, which is opposite to the first closed chamber 52 and the second closed chamber 53, is provided with an air vent 592 connected with an air source, when the valve plate 3 needs to be driven to rotate, the gas is pressed into the cavity 55 through the vent port 592, and then the moving member at the first closing chamber 52 is pushed to move along the moving rail 57, and the moving rod 58 moves towards the second closing chamber 53, the pin 591 on the moving rod 58 also moves in the moving ring 59, and then the moving ring 59 is driven to rotate, the guide sleeve 54 also rotates, so that the valve rod 2 rotates, the driving action on the valve plate 3 is completed, when it is necessary to turn back the valve plate 3, the moving rod 58 can be driven to move in the opposite direction by pressing the other one into the second closed chamber 53, eventually returning the valve plate 3 to its original position, the valve rod 2 is driven to rotate by the driving action of the first closing chamber 52 and the second closing chamber 53 on the two sides of the valve rod 2 on the moving rod 58, the drive mechanism 5 has the beneficial effect of a greater torque while making the rotation of the valve stem 2 smoother, whereas a greater torque of the valve rod 2 means a better sealing effect between the sealing element 4 and the valve plate 3.

The housing is not shown in the figures to make the view clearer.

Claims

1. The utility model provides a double sealing's three eccentric butterfly valves sealed firmly, which comprises a valve body, the valve rod, the valve plate, actuating mechanism and sealing member, the valve body has the horizontal passage that supplies the medium to pass through, the valve rod is along vertical passing valve body and rotation connection in the valve body, the valve plate is fixed in and is rotated with the valve rod is synchronous on the valve rod, actuating mechanism drives the valve rod and rotates, the valve plate is located horizontal passage department and valve plate and horizontal passage looks adaptation, the sealing member is fixed in the inboard and sealing member one side of horizontal passage and is the oblique conical surface, the sealing member seals horizontal passage with the valve plate cooperation, its characterized in that: the valve rod periphery cover be equipped with the swing pinion, be provided with the straight-gear with swing pinion engaged with in the horizontal passage, the straight-gear arranges along the horizontal passage direction, be provided with the movable block with straight-gear synchronous movement on the straight-gear, one side that the relative straight-gear of horizontal passage is located is fitted with a contraceptive ring and is provided with the cooperation circle in movable block looks adaptation, the cooperation circles the contact surface that has with the movable block contact, be provided with the through-hole that supplies the medium circulation on the cooperation circle, the one end of through-hole is located with the contact surface, the other end of through-hole extends to the adjacent side of contact surface, the movable block removes at the contact surface, make horizontal passage have encapsulated situation and circulation state, encapsulated situation is that the through-hole both ends are located one side of movable block, the horizontal passage is encapsulated situation, the circulation state is that the both ends of through-hole are located the both sides of movable block, the medium flows through the cooperation circle from the through-hole, the horizontal passage is the open mode.

2. A double-sealed triple offset hard seal butterfly valve according to claim 1, wherein: the telescopic link is arranged in the spring groove and arranged along the direction close to and far away from the arc groove, the telescopic link is provided with an arc end matched with the arc groove, the spring is compressed between the telescopic link and the spring groove, and the telescopic link has a fixed state in the arc groove and an extension state outside the arc groove.

3. A double-sealed triple offset hard seal butterfly valve according to claim 1, wherein: the outer surface of the sealing element is in a secondary step shape, and the outer surface of the valve plate is matched with the outer surface of the sealing element.

4. A double-sealed triple offset hard seal butterfly valve according to claim 1, wherein: and a shell is arranged outside the rotating gear and the straight gear, and the rotating gear and the straight gear are isolated from the horizontal channel by the shell.

5. A double-sealed triple offset hard seal butterfly valve according to claim 1, wherein: the driving mechanism comprises a first closed chamber and a second closed chamber, a guide sleeve and a guide sleeve synchronously rotate with the valve rod are sleeved at the end part of the valve rod, the first closed chamber and the second closed chamber are respectively positioned at two sides of the valve rod, cavities are respectively arranged in the first closed chamber and the second closed chamber, a moving member matched with the cavity and a moving track for the moving member to move are arranged in each cavity, a moving rod is arranged between the two moving members, the moving rod is positioned at a position vertical to the valve rod, a moving ring for the moving of a pin is arranged on the guide sleeve, the pin penetrates through the moving rod and the moving ring, the pin is fixed on the moving rod and can move along the moving ring, and an air vent connected with an air source is arranged at the other end of the moving rod relative to the first closed chamber and the second closed chamber.