CN214036924U

CN214036924U - Three-eccentric hard seal butterfly valve with good two-way sealing performance

Info

Publication number: CN214036924U
Application number: CN202023223954.9U
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: 2021-08-24
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a three eccentric hard seal butterfly valves that two-way leakproofness is good, which comprises a valve body, the valve body has the horizontal passageway that supplies the medium to pass through, the inboard annular of horizontal passageway is provided with the sealing washer fixed with horizontal passageway, the valve body still is provided with left valve plate and right valve plate, left valve plate and right valve plate set up in horizontal passageway, the sealing washer constitutes horizontal passageway's closure with left valve plate and right valve plate, be provided with between left valve plate and the right valve plate and make left valve plate and right valve plate paste tight elastic mechanism each other, the one side that the sealing washer is close to left valve plate is provided with the left inclined plane to the left bank, left valve plate is close to left inclined plane one side and is provided with the left surface with left inclined plane looks adaptation, the one side that the sealing washer is close to right valve plate is provided with the right inclined plane to the right inclined plane, right valve plate is close to right inclined plane one side and is provided with the right flank with right inclined plane looks adaptation, be provided with drive left valve plate and right valve plate pivoted actuating mechanism on the valve body respectively. The utility model provides a three eccentric hard seal butterfly valves that two-way seal nature is good.

Description

Three-eccentric hard seal butterfly valve with good two-way sealing performance

Technical Field

The utility model relates to a butterfly valve, concretely relates to three eccentric hard seal butterfly valves that two-way seal nature is good.

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

Not enough to prior art exists, the utility model aims to provide a three eccentric hard seal butterfly valves that two-way seal nature is good.

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 medium to pass through, a sealing ring fixed with the horizontal channel is annularly arranged on the inner side of the horizontal channel, the valve body is also provided with a left valve plate and a right valve plate, the left valve plate and the right valve plate are arranged in the horizontal channel, the sealing ring, the left valve plate and the right valve plate form the seal of the horizontal channel, an elastic mechanism for enabling the left valve plate and the right valve plate to be mutually attached is arranged between the left valve plate and the right valve plate, a left inclined plane inclined towards left is arranged on one side of the sealing ring close to the left valve plate, a left side face matched with the left inclined plane is arranged on one side of the left valve plate close to the left inclined plane, a right inclined plane inclined towards right is arranged on one side of the sealing ring close to the right valve plate, a right side face matched with the right inclined plane is arranged on one side of the right valve plate close to the right inclined plane, an inclined plane is formed between the left valve plate and the right valve plate, and a driving mechanism for driving the left valve plate and the right valve plate to rotate is respectively arranged on the valve body, the left valve plate and the right valve plate are enabled to have an opening state and a closing state, the opening state is that the left valve plate and the right valve plate rotate to be parallel to each other, the horizontal channel is opened, and the closing state is that the left valve plate and the right valve plate are located on the same plane, and the horizontal channel is closed.

By adopting the technical scheme, when the butterfly valve is required to be closed, the driving mechanism drives the left valve plate to rotate leftwards, then the left side surface of the left valve plate is abutted against the left inclined surface of the sealing ring to complete the sealing of the left valve plate, the right side surface of the right valve plate is abutted against the right inclined surface of the sealing ring, the sealing of the butterfly valve is completed through the left valve plate and the right valve plate, the elastic mechanism is arranged between the left valve plate and the right valve plate, when the left valve plate and the right valve plate are mutually attached, the left valve plate and the right valve plate can be regarded as a whole, when media flow from left to right, the left valve plate and the right valve plate have the tendency of clockwise movement, namely, the left valve plate has the tendency of being separated from the left inclined surface, the right valve plate has the tendency of being attached to the right inclined surface, so that the left valve plate has driving force on the right valve plate, the right valve plate can also have powerful action on the left valve plate through mutual force, the left valve plate is not separated from the left inclined surface, and the leakage is avoided, when the medium flows from the right to the left, the right valve plate is driven by the left valve plate similarly to the flow from the left to the right, so that the right valve plate is not separated from the right inclined plane, and the valve plate is divided into the left valve plate and the right valve plate.

The utility model discloses further set up to: the driving mechanism comprises a valve rod, a first closed chamber and a second closed chamber, the valve rod vertically penetrates through the valve body and is fixed on the left valve plate or the right valve plate, a guide sleeve is sleeved at the end of the valve rod and rotates synchronously with the valve rod, the first closed chamber and the second closed chamber are respectively located on two sides of the valve rod, cavities are respectively formed in the first closed chamber and the second closed chamber, a moving block matched with the cavity and a moving track for the moving block to move are arranged in each cavity, a moving rod is arranged between the two moving blocks and is located at a position perpendicular to the valve rod, a moving ring for the pin to move 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 moves along the moving ring, and an air vent connected with an air source is formed in the other end, opposite to the moving rod, of the first closed chamber and the second closed chamber.

By adopting the technical scheme, when the left valve plate and the right valve plate are required to be driven to rotate, gas enters the cavity through the vent hole, then the moving block in the first closed chamber is pushed to move along the moving track, the moving rod moves towards the second closed chamber, the pin on the moving rod also moves in the moving ring and then drives the moving ring to rotate, the guide sleeve also rotates to enable the valve rod to rotate, the driving effect on the left valve plate and the right valve plate is completed, when the left valve plate and the right valve plate are required to be rotated back, the moving rod can be driven to move reversely by pressing other pins into the second closed chamber, finally the left valve plate and the right valve plate return to the original position, the valve rod is driven to rotate by the driving effect of the first closed chamber and the second closed chamber on the moving rod at two sides of the valve rod, and the driving mechanism has the beneficial effect of larger torque while enabling the rotation of the valve rod to be more stable, and the higher torque of the valve rod represents the better sealing effect between the sealing ring and the valve plate.

The utility model discloses further set up to: elastic mechanism include telescopic link and spring, be provided with the arc recess on the valve plate of a left side, be provided with the spring groove relative with the arc recess on the valve plate of the right side, the telescopic link sets up in the spring inslot and arranges along the direction of being close to and keeping away from the arc recess, the telescopic link have with the arc end of arc recess looks adaptation, the spring compresses tightly between telescopic link and spring groove, the telescopic link has the fixed state that is in the arc recess and the extension state that the telescopic link is outside the arc recess.

By adopting the technical scheme, when the left valve plate and the right valve plate are in a closed state, the spring drives the telescopic rod to move outwards the spring groove, namely the telescopic rod moves into the arc-shaped groove to fix the left valve plate and the right valve plate mutually, when the driving mechanism drives the left valve plate and the right valve plate to open the horizontal channel, the telescopic rod moves out of the arc-shaped groove, the fixing effect on the left valve plate and the right valve plate is lost, the left valve plate and the right valve plate are converted into an open state, when the horizontal channel needs to be closed, the left valve plate and the right valve plate rotate to the original positions, in the process, the telescopic rod is abutted against the left valve plate, 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 on the left valve plate and the right valve plate is finished through the elastic mechanism, so that no gap is generated between the left valve plate and the right valve plate under the impact of a medium, and good sealing performance is kept, under the drive of the driving mechanism, the driving force is far greater than the impact of a medium and is greater than the fixing force of the telescopic rod, so that the left valve plate and the right valve plate can be mutually opened.

The utility model discloses further set up to: the elastic mechanism is provided with a plurality of elastic mechanisms arranged between the left valve plate and the right valve plate.

Through adopting above-mentioned technical scheme, set up a plurality of elastic mechanism and make the telescopic link rise greatly to the fixed power of left valve plate and right valve plate, avoid the impact at the medium because the fixed power of telescopic link is not enough to lead to the emergence of revealing.

The utility model discloses further set up to: the arc-shaped groove is provided with an elastic layer.

Through adopting above-mentioned technical scheme, set up the spring layer and avoid in the reciprocating motion of telescopic link, cause the destruction to the arc recess, and then influence the fixed of left valve plate and right valve plate.

The utility model discloses further set up to: the sealing ring is made of metal.

Through adopting above-mentioned technical scheme, the leakproofness of metal material is stronger than the plastic material, can promote the leakproofness of butterfly valve.

Drawings

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

fig. 2 is a side view of the utility model in its entirety;

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

FIG. 4 is a perspective view of the drive mechanism of the present invention with the first enclosure and the second enclosure removed;

fig. 5 is a partial enlarged view a of the present invention.

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. 1-5, the utility model discloses a three-eccentric hard seal butterfly valve with good two-way sealing performance, which comprises a valve body 1, wherein the valve body 1 is provided with a horizontal channel 2 for medium to pass through, a sealing ring 3 fixed with the horizontal channel 2 is annularly arranged at the inner side of the horizontal channel 2, the valve body 1 is also provided with a left valve plate 11 and a right valve plate 12, the left valve plate 11 and the right valve plate 12 are arranged in the horizontal channel 2, the sealing ring 3, the left valve plate 11 and the right valve plate 12 form the seal of the horizontal channel 2, an elastic mechanism 4 for tightly adhering the left valve plate 11 and the right valve plate 12 is arranged between the left valve plate 11 and the right valve plate 12, one side of the sealing ring 3 close to the left valve plate 11 is provided with a left inclined plane 31 inclined to the left side, one side of the left valve plate 11 close to the left inclined plane 31 is provided with a left side surface 111 matched with the left inclined plane 31, one side of the sealing ring 3 close to the right valve plate 12 is provided with a right inclined plane 32 inclined plane, a right side surface 121 matched with the right inclined surface 32 is arranged on one side of the right valve plate 12 close to the right inclined surface 32, an inclined surface is formed between the left valve plate 11 and the right valve plate 12, a driving mechanism 5 for driving the left valve plate 11 and the right valve plate 12 to rotate is respectively arranged on the valve body 1, so that the left valve plate 11 and the right valve plate 12 have an opening state and a closing state, the opening state is that the left valve plate 11 and the right valve plate 12 rotate to be parallel to each other, the horizontal channel 2 is opened, the closing state is that the left valve plate 11 and the right valve plate 12 are positioned on the same plane, the horizontal channel 2 is closed, when the butterfly valve needs to be closed, the driving mechanism 5 drives the left valve plate 11 to rotate leftwards, then the left side surface 111 of the left valve plate 11 abuts against the left inclined surface 31 of the sealing ring 3, the closing of the left valve plate 11 is completed, similarly, the right side surface 121 of the right valve plate 12 abuts against the right inclined surface 32 of the sealing ring 3, and the butterfly valve is completed through the left valve plate 11 and the right valve plate 12, the elastic mechanism 4 is disposed between the left valve plate 11 and the right valve plate 12, when the left valve plate 11 and the right valve plate 12 are attached to each other, the valve plate can be regarded as a whole, when a medium flows from left to right, the valve plate 11 and the right valve plate 12 both have a tendency to move clockwise, that is, the left valve plate 11 tends to separate from the left inclined surface 31, and the right valve plate 12 tends to adhere to the right inclined surface 32, so that the left valve plate 11 has a driving force for the right valve plate 12, and the right valve plate 12 also strongly acts on the left valve plate 11 by the mutual force, so that the left valve plate 11 does not separate from the left inclined surface 31, thereby avoiding the occurrence of leakage, when the medium flows from right to left, the right valve plate 12 is driven by the left valve plate 11, so that the right valve plate 12 does not separate from the right inclined surface 32, and the valve plate is divided into the left valve plate 11 and the right valve plate 12, because the valve plates are integrated, no matter how the driving mechanism 5 is driven, the left rotation of the valve plate can abut against the left inclined surface 31 and cannot move, the right rotation of the valve plate can abut against the right inclined surface 32, unless the sealing ring 3 is damaged, the valve plate cannot be opened, so that the valve plate is divided into a left valve plate 11 and a right valve plate 12, when the valve plate is closed, the valve plate is integrated through the elastic mechanism 4, and when the driving mechanism 5 drives the left valve plate 11 and the right valve plate 12, the elastic mechanism 4 is disabled by the driving force, and then the valve is opened.

The driving mechanism 5 comprises a valve rod 51, a first closing chamber 52 and a second closing chamber 53, the valve rod 51 vertically penetrates through the valve body 1 and is fixed on the left valve plate 11 or the right valve plate 12, a guide sleeve 54 is sleeved at the end of the valve rod 51, the guide sleeve 54 and the valve rod 51 synchronously rotate, the first closing chamber 52 and the second closing chamber 53 are respectively positioned at two sides of the valve rod 51, cavities 55 are respectively arranged in the first closing chamber 52 and the second closing chamber 53, a moving block 56 matched with the cavities 55 and a moving track 57 for moving the moving block 56 are arranged in each cavity 55, a moving rod 58 is arranged between the two moving blocks 56, the moving rod 58 is positioned at a position vertical to the valve rod 51, a moving ring 59 for moving a pin 591 is arranged on the guide sleeve 54, 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 moves along the moving ring 59, an air vent 531 connected with an air source is arranged at the other end, opposite to the moving rod 58, of the first closing chamber 52 and the second closing chamber 53, when the left valve plate 11 and the right valve plate 12 need to be driven to rotate, gas enters the cavity 55 through the vent hole 531, then the moving block 56 in the first closed chamber 52 is pushed to move along the moving track 57, the moving rod 58 moves towards the second closed chamber 53, the pin 591 on the moving rod 58 also moves in the moving ring 59, then the moving ring 59 is driven to rotate, the guide sleeve 54 also rotates, the valve rod 51 rotates, the driving effect on the left valve plate 11 and the right valve plate 12 is completed, when the left valve plate 11 and the right valve plate 12 need to be rotated back, the moving rod 58 can be driven to move reversely by pressing other parts into the second closed chamber 53, finally the left valve plate 11 and the right valve plate 12 are returned to the original position, the moving rod 51 is driven to rotate by the driving effect of the first closed chamber 52 and the second closed chamber 53 on two sides of the valve rod 51, and the driving mechanism 5 has the beneficial effects of enabling the rotation of the valve rod 51 to be more smooth and having larger torque, whereas a greater torque of the valve rod 51 means a better sealing effect between the sealing ring 3 and the valve plate.

The elastic mechanism 4 comprises an expansion link 41 and a spring 42, the left valve plate 11 is provided with an arc-shaped groove 43, the right valve plate 12 is provided with a spring groove 44 opposite to the arc-shaped groove 43, the expansion link 41 is arranged in the spring groove 44 and is arranged in a direction close to and far away from the arc-shaped groove 43, the expansion link 41 is provided with an arc-shaped end 411 matched with the arc-shaped groove 43, the spring 42 is compressed between the expansion link 41 and the spring groove 44, the expansion link 41 is in a fixed state of the arc-shaped groove 43 and in an extended state of the expansion link 41 outside the arc-shaped groove 43, when the left valve plate 11 and the right valve plate 12 are in a closed state, the spring 42 drives the expansion link 41 to move outwards of the spring groove 44, namely the expansion link 41 moves into the arc-shaped groove 43, so that the left valve plate 11 and the right valve plate 12 are fixed with each other, and when the driving mechanism 5 drives the left valve plate 11 and the right valve plate 12 to open the horizontal channel 2, the expansion link 41 moves out of the arc-shaped groove 43, the left valve plate 11 and the right valve plate 12 lose the fixing effect on the left valve plate 11 and the right valve plate 12, the left valve plate 11 and the right valve plate 12 are turned to be in an open state, when the horizontal channel 2 needs to be closed, the left valve plate 11 and the right valve plate 12 rotate to the original positions, in the process, the expansion rod 41 abuts against the left valve plate 11, then the expansion rod 41 is pressed into the spring groove 44 until the expansion rod 41 corresponds to the corresponding arc-shaped groove 43, the expansion rod 41 extends out, the left valve plate 11 and the right valve plate 12 are fixed through the elastic mechanism 4, so that gaps still do not occur between the left valve plate 11 and the right valve plate 12 under the impact of media, good sealing performance is kept, and under the driving of the driving mechanism 5, the driving force is far greater than the impact of the media and is greater than the fixing force of the expansion rod 41, so that the left valve plate 11 and the.

Elastic mechanism 4 has a plurality of to set up between left valve plate 11 and right valve plate 12, sets up a plurality of elastic mechanism 4 and makes telescopic link 41 rise greatly to the fixed force of left valve plate 11 and right valve plate 12, avoids the impact at the medium because telescopic link 41's fixed force is not enough to lead to revealing the emergence.

The elastic layer is arranged on the arc-shaped groove 43, and the spring 42 layer is arranged to prevent the arc-shaped groove 43 from being damaged in the reciprocating movement of the telescopic rod 41, so that the fixation of the left valve plate 11 and the right valve plate 12 is influenced.

The sealing ring 3 is made of metal, the sealing performance of the metal is better than that of plastic, and the sealing performance of the butterfly valve can be improved.

The elastic layer is not shown in the figures to ensure a clear view.

Claims

1. The utility model provides a three eccentric butterfly valves sealed firmly that two-way leakproofness is good, includes the valve body, and the valve body has the horizontal passage that supplies the medium to pass through, its characterized in that: the inner side of the horizontal channel is annularly provided with a sealing ring fixed with the horizontal channel, the valve body is also provided with a left valve plate and a right valve plate, the left valve plate and the right valve plate are arranged in the horizontal channel, the sealing ring, the left valve plate and the right valve plate form the seal of the horizontal channel, an elastic mechanism for enabling the left valve plate and the right valve plate to be mutually attached is arranged between the left valve plate and the right valve plate, one surface of the sealing ring close to the left valve plate is provided with a left inclined surface inclined to the left, one side of the left valve plate close to the left inclined surface is provided with a left side surface matched with the left inclined surface, one surface of the sealing ring close to the right valve plate is provided with a right inclined surface inclined to the right, one side of the right valve plate close to the right inclined surface is provided with a right side surface matched with the right inclined surface, an inclined surface is formed between the left valve plate and the right valve plate, the valve body is respectively provided with a driving mechanism for driving the left valve plate and the right valve plate to rotate, so that the left valve plate and the right valve plate have an opening state and a closing state, the opening state is that the left valve plate and the right valve plate rotate to be parallel to each other, the horizontal channel is opened, and the closing state is that the left valve plate and the right valve plate are positioned on the same plane, and the horizontal channel is closed.

2. The triple offset hard seal butterfly valve with good two-way sealing performance according to claim 1, wherein: the driving mechanism comprises a valve rod, a first closed chamber and a second closed chamber, the valve rod vertically penetrates through the valve body and is fixed on the left valve plate or the right valve plate, a guide sleeve is sleeved at the end of the valve rod and rotates synchronously with the valve rod, the first closed chamber and the second closed chamber are respectively located on two sides of the valve rod, cavities are respectively formed in the first closed chamber and the second closed chamber, a moving block matched with the cavity and a moving track for the moving block to move are arranged in each cavity, a moving rod is arranged between the two moving blocks and is located at a position perpendicular to the valve rod, a moving ring for the pin to move 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 moves along the moving ring, and an air vent connected with an air source is formed in the other end, opposite to the moving rod, of the first closed chamber and the second closed chamber.

3. The triple offset hard seal butterfly valve with good two-way sealing performance according to claim 1, wherein: elastic mechanism include telescopic link and spring, be provided with the arc recess on the valve plate of a left side, be provided with the spring groove relative with the arc recess on the valve plate of the right side, the telescopic link sets up in the spring inslot and arranges along the direction of being close to and keeping away from the arc recess, the telescopic link have with the arc end of arc recess looks adaptation, the spring compresses tightly between telescopic link and spring groove, the telescopic link has the fixed state that is in the arc recess and the extension state that the telescopic link is outside the arc recess.

4. The triple offset hard seal butterfly valve with good two-way sealing performance according to claim 1, wherein: the elastic mechanism is provided with a plurality of elastic mechanisms arranged between the left valve plate and the right valve plate.

5. The triple offset hard seal butterfly valve with good two-way sealing performance according to claim 3, wherein: the arc-shaped groove is provided with an elastic layer.

6. The triple offset hard seal butterfly valve with good two-way sealing performance according to claim 1, wherein: the sealing ring is made of metal.