Bidirectional three-eccentric center butterfly valve

Abstract

The invention relates to the technical field of valve equipment, in particular to a two-way three-eccentric center butterfly valve which comprises a valve body, a valve rod perpendicular to the axis of the valve body is arranged in the valve body in a sealed rotating fit mode, and the valve rod deviates from the axis of the valve body. A first cone and a second cone which are coaxial with the butterfly plate are respectively arranged on the first side surface and the second side surface of the butterfly plate; the valve rod is rotationally connected to the eccentric position of the first cone; the second side face of the butterfly plate is connected with a control drive arranged on the valve body, the butterfly plate is driven by the control drive to rotate along the axis of the valve rod, and opening or closing of a valve cavity of the valve body is achieved. The valve rod only supports and limits the butterfly plate, so that the problem of sealing failure caused by relative rotation of the butterfly plate and the valve rod is solved; the rotation of the butterfly plate is controlled by the control drive, the butterfly plate is driven by the control drive to rotate along the axis of the valve rod, opening or closing of the valve cavity of the valve body is achieved, and the stability is good in the opening or closing state.

Description

Technical Field

[0001] The invention relates to the technical field of valve equipment, and more specifically to a bidirectional three-eccentric butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate. By rotating the butterfly plate around the corresponding axis in the valve body, the purpose of opening, closing or regulating the flow of the medium can be achieved. The butterfly valve is not only simple in structure, small in size, light in weight, economical in material consumption, small in installation size, small in driving torque, easy and quick to operate, but also has good flow regulation function and closing and sealing characteristics at the same time. It is one of the fastest growing valve varieties in the past decade. Butterfly valves are divided into center-sealed butterfly valves, single-eccentric sealed butterfly valves, double-eccentric sealed butterfly valves and triple-eccentric sealed butterfly valves according to their structural forms.

[0003] The three-eccentric sealed butterfly valve in the prior art relies on the valve stem to control opening and closing, and the connection stability between the valve stem and the butterfly plate is crucial. However, in actual use, the two may become loose. When the butterfly plate is subjected to liquid pressure for a long time, the valve stem and the butterfly plate are more likely to loosen. Liquid pressure is a common and continuous force in the pipeline system, and the existing butterfly valve cannot effectively cope with this continuous pressure. When the valve stem and the butterfly plate are loose, the butterfly plate is easy to rotate under the impact of the water pressure inside the valve body, causing a gap between the butterfly plate and the valve body, and eventually causing water in the water pipe to leak out. Sealing performance is one of the key performance indicators of the valve, and the existing three-eccentric sealed butterfly valve is prone to sealing failure caused by the looseness of the valve stem and the butterfly plate, which seriously affects its normal use function and cannot meet the pipeline system's requirements for valve sealing. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a bidirectional three-eccentric butterfly valve.

[0005] The technical solution adopted by the present invention is:

[0006] A two-way three-eccentric butterfly valve comprises: a valve body, a valve stem which is sealably rotatable in the valve body and is perpendicular to the valve stem axis, and the valve stem is arranged offset from the valve body axis; a butterfly plate which is sealably rotatable in the valve body, and a first cone and a second cone which are coaxial with the butterfly plate are arranged on the first side and the second side of the butterfly plate, respectively; the valve stem is transferred to the eccentric position of the first cone; the second side of the butterfly plate is connected to a control drive arranged on the valve body, and the butterfly plate rotates along the axis of the valve stem under the drive of the control drive to realize opening or closing of the valve cavity of the valve body.

[0007] Furthermore, the control drive includes: a first rod, the first rod is rotated on the second side of the butterfly plate through a first hinge shaft, the first rod is rotated on the transverse movement shaft mechanism through a second hinge shaft, the transverse movement shaft mechanism is slid on the guide bracket in the valve cavity of the valve body, the transverse movement shaft mechanism is movably connected to the second connecting rod, the second connecting rod is rotated on the longitudinal movement seat, the longitudinal movement seat is connected to the cylinder shaft of the driving cylinder, the cylinder shaft seal is slidably arranged on the first opening of the side wall of the valve body, and the cylinder barrel of the driving cylinder is installed on the outer wall of the valve body through the cylinder seat.

[0008] Furthermore, the connection surface between the longitudinal displacement seat and the cylinder shaft is an outer arc surface that is sealed and fitted with the inner wall of the valve cavity of the valve body.

[0009] Furthermore, the first hinge shaft and the valve stem are arranged in parallel and are respectively located at two ends of the butterfly plate axis.

[0010] Furthermore, a stopper is provided on the inner wall of the valve body and the valve cavity, and the first hinge shaft is located between the valve stem and the stopper. When the butterfly plate closes the valve body and the valve cavity, the first side surface of the butterfly plate contacts and cooperates with the stopper.

[0011] Furthermore, the transverse shift axis mechanism includes: a transverse shift body coaxially arranged with the second cone, the transverse shift body slidably arranged in the transverse opening of the guide bracket, the transverse shift body is rotatably connected with the second connecting rod, a traction rod is fixed on the side of the transverse shift body close to the second cone, the traction rod is slidably fitted in the transverse shift sleeve, the transverse shift sleeve is hinged to the first rod through the second hinge shaft, the traction and pressure body is fixedly connected to the end of the traction rod away from the transverse shift body, the traction and pressure body is slidably arranged in the axial slideway of the second cone, the butt ring slidably arranged on the traction rod and the transverse shift sleeve is connected by a telescopic spring body sleeved on the traction rod; the butt ring is butt-fitted on the second cone, the butt tube on the butt ring is slidably arranged on the axial slideway of the second cone, and the end of the butt tube away from the butt ring is butt-fitted with the traction and pressure body.

[0012] Furthermore, an outer tube sleeve for sleeved on the cylindrical head outside the second cone is also provided on the side of the abutment ring close to the second cone, and the outer tube sleeve is coaxially arranged on the outside of the abutment tube.

[0013] Furthermore, a plurality of small-flow through holes are provided on the butterfly plate, and the plurality of small-flow through holes are connected to a sealing control component arranged on the first side surface of the butterfly plate; the middle section of the valve stem is a worm structure, and the worm structure of the valve stem cooperates with the sealing control component, and the shaft of the valve stem passing through the second opening of the side wall of the valve body is connected to a manual control wheel or a motor; the manual control wheel or the motor controls the sealing control component to open or close the plurality of small-flow through holes through the valve stem.

[0014] Furthermore, the sealing and control component includes: a screw rod coaxially rotated on the second side of the butterfly plate, a worm wheel fixedly connected to the screw rod and meshing with the worm structure of the valve stem; the screw rod is adapted to be transferred to the circular branch hole of the first cone away from the butterfly plate, the screw rod passes through the rod body outside the mounting cavity of the first cone and is threadedly connected to a sealing and control slide seat, a plurality of plug support rods are fixedly connected to the sealing and control slide seat, the plurality of plug support rods are connected to a plurality of plugs for opening or closing small flow through holes, a plurality of guide plates are arranged on the first cone, and each guide plate is slidably arranged in a clamping groove between two adjacent plug support rods.

[0015] Furthermore, the plug includes: a cylindrical plug fixed on the plug support rod and a conical plug fixed to the cylindrical plug, the diameter of the cylindrical plug is larger than the diameter of the small flow through hole; the diameter of the small flow through hole is larger than the diameter of the end of the conical plug away from the cylindrical plug, and smaller than the diameter of the connecting end of the conical plug and the cylindrical plug.

[0016] It can be seen from the above scheme that the beneficial effects of the present invention are:

[0017] In a two-way three-eccentric butterfly valve of the present invention, the valve stem is transferred to the eccentric position of the first cone and is located on one side of the butterfly plate, which only supports and limits the butterfly plate, thereby avoiding the problem of sealing failure caused by the relative rotation of the butterfly plate and the valve stem; in a two-way three-eccentric butterfly valve of the present invention, the rotation of the butterfly plate is controlled by a control drive, and the butterfly plate rotates along the axis of the valve stem under the drive of the control drive to realize the opening or closing of the valve body valve cavity, and it has good stability in the open or closed state; its improved sealing performance and stability enable it to adapt to a wider range of working conditions, especially in some fields with high requirements on valve sealing and stability, such as pipeline systems in chemical, petroleum, electric power and other industries, it can play a better role and ensure the safe and stable operation of the system.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 Schematic diagram of a bidirectional triple eccentric butterfly valve provided in an embodiment of the present invention Figure 1 ;

[0021] Figure 2 Schematic diagram of a bidirectional triple eccentric butterfly valve provided in an embodiment of the present invention Figure 2 ;

[0022] Figure 3A cross-sectional view of a bidirectional triple-eccentric butterfly valve provided in an embodiment of the present invention;

[0023] Figure 4 A partial schematic diagram of a bidirectional triple-eccentric butterfly valve provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a valve body provided in an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of a butterfly plate provided in an embodiment of the present invention Figure 1 ;

[0026] Figure 7 Schematic diagram of a butterfly plate provided in an embodiment of the present invention Figure 2 ;

[0027] Figure 8 A schematic diagram of a control drive provided by an embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a transverse axis mechanism provided by an embodiment of the present invention;

[0029] Fig.10 A cross-sectional view of a transverse axis mechanism provided in an embodiment of the present invention;

[0030] Fig.11 A sealing component provided by an embodiment of the present invention.

[0031] Icons: valve body 1; valve stem 2; butterfly plate 3; first cone 4; second cone 5; control drive 6; first rod 601; first hinge axis 602; transverse axis mechanism 603; guide bracket 604; second connecting rod 605; longitudinal seat 606; driving cylinder 607; transverse body 608; traction rod 609; transverse sleeve 610; traction and pressure body 611; resistance ring 612; telescopic spring body 613; resistance tube 614; outer sleeve 615; in-position stopper 7; small flow through hole 8; sealing component 9; screw rod 901; worm gear 902; sealing slide 903; plug support rod 904; plug 905; manual wheel 10; guide plate 11. DETAILED DESCRIPTION

[0032] In order to clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0034] Example 1

[0035] See also Figure 1-Figure 11 The present invention provides a two-way three-eccentric butterfly valve, comprising: a valve body 1, a valve stem 2 which is perpendicular to the axis of the valve body 1 and is sealed and rotated inside the valve body 1, and the valve stem 2 is arranged away from the axis of the valve body 1; a butterfly plate 3 which is sealed and rotated inside the valve body 1, and a first cone 4 and a second cone 5 which are coaxial with the butterfly plate 3 are arranged on the first side and the second side respectively; the valve stem 2 is transferred to the eccentric position of the first cone 4; the second side of the butterfly plate 3 is connected to the control drive 6 arranged on the valve body 1, and the butterfly plate 3 rotates along the axis of the valve stem 2 under the drive of the control drive 6 to realize the opening or closing of the valve cavity of the valve body 1.

[0036] The working principle and technical effects of the above technical solution are as follows:

[0037] The present invention provides a two-way three-eccentric butterfly valve, in which the valve body 1 serves as the basic structure of the entire butterfly valve, provides installation space and support for other components, and is also a channel for fluid flow, bearing the pressure and flow of the fluid; its internal valve cavity can ensure that the fluid flows smoothly therein, and through the sealing rotation, the valve stem 2 and the butterfly plate 3 are matched to ensure the sealing of the valve during operation and reduce the possibility of fluid leakage; the valve stem 2 is set away from the axis of the valve body 1 and is transferred to the eccentric position of the first cone 4, which only supports and limits the butterfly plate 3, constrains the rotation trajectory of the butterfly plate 3, and enables the butterfly plate 3 to rotate stably along a specific axis, and the valve The stem 2 and the butterfly plate 3 are in a state of relative rotation connection, and there is no need to control the rotation of the butterfly plate 3, which avoids the sealing failure problem caused by the relative rotation loosening of the valve stem and the butterfly plate in the traditional butterfly valve. Since it only bears the supporting and limiting functions, the influence of the interaction with the butterfly plate 3 on the sealing performance is reduced, and the sealing reliability of the valve is improved; the butterfly plate 3 is a key component for controlling the flow of fluid, and its position in the valve body 1 is changed by rotation, so as to realize the opening or closing of the valve cavity of the valve body 1. The first cone 4 and the second cone 5 are respectively arranged on both sides of the butterfly plate 3, which helps to enhance the structural strength and stability of the butterfly plate 3, and can The first cone 4 and the second cone 5 are respectively arranged on the first side and the second side of the butterfly plate 3, and are coaxial with the butterfly plate 3, which can play a certain guiding and positioning role, so that the butterfly plate 3 is more stable during the rotation process; when in use, the butterfly plate 3 is driven to rotate by the control drive 6, so as to realize the opening or closing of the valve cavity of the valve body 1. The specific process is: the control drive 6 is connected to the second side of the butterfly plate 3. When the control drive 6 is started, the butterfly plate 3 is driven to rotate along the axis of the valve stem 2. The valve stem 2 is transferred to the eccentric position of the first cone 4, which plays a role in supporting and limiting the butterfly plate 3, ensuring The stability and accuracy of the rotation of the butterfly plate 3, through the rotation of the butterfly plate 3, changes its position in the valve body 1, and then realizes the opening or closing operation of the valve cavity of the valve body 1 to control the flow of the fluid; the control drive 6 is directly connected to the second side of the butterfly plate 3 to provide power for the rotation of the butterfly plate 3. Through the action of the control drive 6, the rotation angle and speed of the butterfly plate 3 can be accurately controlled, thereby realizing the control of the opening or closing degree of the valve cavity of the valve body 1; the independent control drive 6 makes the rotation of the butterfly plate 3 more precise and stable, without being interfered by the valve stem 2, thereby improving the flexibility and reliability of the valve operation, and can better adapt to different working conditions.

[0038] Example 2

[0039] See also Figure 1-Figure 11The control drive 6 includes: a first rod 601, the first rod 601 is rotated on the second side of the butterfly plate 3 through a first hinge shaft 602, the first rod 601 is rotated on a transverse axis mechanism 603 through a second hinge shaft, the transverse axis mechanism 603 is slidably arranged on a guide bracket 604 in the valve cavity of the valve body 1, the transverse axis mechanism 603 is movably connected to a second connecting rod 605, the second connecting rod 605 is rotated on a longitudinal seat 606, the longitudinal seat 606 is connected to the cylinder shaft of the driving cylinder 607, the cylinder shaft seal is slidably arranged on the first opening of the side wall of the valve body 1, and the cylinder barrel of the driving cylinder 607 is installed on the outer wall of the valve body 1 through the cylinder seat. The connection surface between the longitudinal seat 606 and the cylinder shaft is an outer arc surface that is sealed and fitted with the inner wall of the valve cavity of the valve body 1. The first hinge shaft 602 and the valve stem 2 are arranged in parallel, and are respectively located at both ends of the axis of the butterfly plate 3. The inner wall of the valve cavity of the valve body 1 is also provided with a stopper 7 in place, and the first hinge shaft 602 is located between the valve stem 2 and the stopper 7 in place. When the butterfly plate 3 closes the valve cavity of the valve body 1, the first side surface of the butterfly plate 3 contacts and cooperates with the stopper 7 in place.

[0040] The working principle and technical effects of the above technical solution are as follows:

[0041] The present invention provides a two-way three-eccentric butterfly valve. After the driving cylinder 607 is started, its cylinder shaft can drive the longitudinal displacement seat 606 to move in the up and down directions. When the longitudinal displacement seat 606 approaches the axis of the valve body 1, that is, when it moves closer to the transverse displacement shaft mechanism 603, the longitudinal displacement seat 606 can push the connection end with the second connecting rod 605 to approach the transverse displacement shaft mechanism 603. At this time, the other end of the second connecting rod 605 drives the transverse displacement shaft mechanism 603 to move in the direction away from the butterfly plate 3. The guide bracket 604 plays a role of limiting. When the transverse displacement shaft mechanism 603 slides on the guide bracket 604 , driving one end of the first rod 601 to move in the direction away from the butterfly plate 3, and the other end of the first rod 601 drives the butterfly plate 3 to flip around the axis of the valve stem 2, thereby opening the valve; when the valve needs to be closed, this can control the longitudinal shift seat 606 to move downward and block the inner side of the first opening of the inner wall of the valve cavity of the valve body 1. The longitudinal shift seat 606 moves downward so that the second connecting rod 605 drives the transverse shift axis mechanism 603 to move in the direction of the butterfly plate 3, thereby controlling the butterfly plate 3 to close the valve cavity of the valve body 1, and making the first side surface of the butterfly plate 3 contact and cooperate with the in-place stopper 7 when closing, to ensure that it is closed in place.

[0042] In the present invention, the linear motion of the driving cylinder is converted into the flipping motion of the butterfly plate through the connecting rod system composed of the first rod, the second connecting rod, the transverse axis mechanism, etc., so that the motion transmission is more stable and accurate, and the opening and closing operations of the valve can be reliably realized. For example, the transverse axis mechanism slides on the guide bracket, ensuring the accuracy of the direction and trajectory of the movement, reducing the deviation and shaking during the movement; the use of the first hinge axis and the second hinge axis allows each rod to rotate flexibly, reducing the friction and wear during the movement, and extending the service life of the components; at the same time, the first hinge axis and the valve stem are arranged in parallel and are respectively located at the two ends of the butterfly plate axis. This layout helps to evenly transmit force, so that the butterfly plate can rotate smoothly around the valve stem. The connection surface between the longitudinal seat and the cylinder shaft is an outer arc surface that is sealed with the inner wall of the valve body and the valve cavity. When the valve is closed, the longitudinal seat moves downward and blocks the inner side of the first opening of the inner wall of the valve body and the valve cavity, further enhancing the sealing performance of the valve and effectively preventing medium leakage; the in-place stopper set on the inner wall of the valve body and the valve cavity enables the first side of the butterfly plate to contact and cooperate with the in-place stopper when closing, ensuring that the butterfly plate is closed in place, avoiding the problem of poor sealing caused by incomplete closing, and improving the sealing reliability of the valve. The driving cylinder is used as the power source, which is simple and convenient to operate, can quickly respond to the control signal, and realize the opening and closing of the valve. By controlling the telescopic length and speed of the cylinder shaft, the rotation angle of the butterfly plate can be accurately controlled, thereby realizing the precise adjustment of the valve opening and meeting the control requirements of flow and pressure under different working conditions.

[0043] Example 3

[0044] See also Figure 1-Figure 11 The transverse axis mechanism 603 includes: a transverse body 608 coaxially arranged with the second cone 5, the transverse body 608 is slidably arranged in the transverse opening of the guide bracket 604, the transverse body 608 is rotatably connected with the second connecting rod 605, a traction rod 609 is fixed on the side of the transverse body 608 close to the second cone 5, the traction rod 609 is slidably fitted in the transverse sleeve 610, the transverse sleeve 610 is hinged to the first rod 601 through the second hinge shaft, and the traction rod 609 is away from the transverse body 60 One end of the second cone 5 is fixedly connected to the traction and pressure body 611, which is slidably arranged in the axial slideway of the second cone 5. The ring 612 slidably arranged on the traction rod 609 is connected to the lateral sleeve 610 through a telescopic spring body 613 sleeved on the traction rod 609; the ring 612 is abutted and fitted on the second cone 5, and the abutment tube 614 on the ring 612 is slidably arranged in the axial slideway of the second cone 5, and the end of the abutment tube 614 away from the ring 612 abuts against the traction and pressure body 611. The side of the ring 612 close to the second cone 5 is also provided with an outer tube sleeve 615 for sleeved on the outer cylindrical head of the second cone 5, and the outer tube sleeve 615 is coaxially arranged outside the abutment tube 614.

[0045] The working principle and technical effects of the above technical solution are as follows:

[0046] The present invention provides a bidirectional three-eccentric butterfly valve. In order to improve the stability of the butterfly plate 3 when closing the valve body 1 and reduce the impact of fluid pressure shock on the butterfly plate 3, the structure of the above-mentioned transverse shaft mechanism 603 is specially designed. When the butterfly plate 3 closes the valve cavity of the valve body 1 and the first side surface of the butterfly plate 3 contacts and cooperates with the in-place stopper 7, as shown in FIG. Figure 3 As shown, the tension and pressure body 611 and the resistance tube 614 are both in a state of being slidably arranged in the axial slideway of the second cone 5. At this time, a stable triangular support structure is formed between the resistance tube 614, the first rod 601 and the butterfly plate 3, which effectively improves the stability of the butterfly plate 3 in the valve closing state. In addition, since the tension and pressure body 611 and the resistance tube 614 are both slidably arranged in the axial slideway of the second cone 5, the tension and pressure body 611 and the resistance tube 614 limit the second cone 5, so that the second cone 5 cannot rotate around the axis of the valve stem 2, thereby limiting the butterfly plate 3 and locking the butterfly plate 3 in the closed state; and the setting of the above-mentioned transverse displacement shaft mechanism 603 structure will not affect the opening of the butterfly plate 3. When the butterfly plate 3 needs to be opened, the second connecting rod 605 drives the transverse displacement body 608 to move in the direction away from the butterfly plate 3, and the transverse displacement body 608 drives the tension and pressure body 611 to move through the traction rod 609. When the traction and pressure body 611 slides outward in the axial slideway of the second cone 5, the top pressure contact tube 614 slides outward to the outside of the axial slideway. At this time, the top pressure contact tube 614 drives the retaining ring 612 to move in the direction of the transverse sleeve 610, and compresses the telescopic spring body 613 sleeved on the traction rod 609. When the traction and pressure body 611 and the contact tube 614 are completely separated from the axial slideway of the second cone 5, the limit on the second cone 5 is released. At this time, as the telescopic spring body 613 is compressed, the transverse body 608 continues to move in the direction away from the butterfly plate 3, which can drive the transverse sleeve 610 to move in the direction away from the butterfly plate 3. When the transverse sleeve 610 moves, it can drive one end of the first rod 601 to move outward, and the other end of the first rod 601 pulls the butterfly plate 3 to rotate around the axis of the valve stem 2, thereby controlling the flipping of the butterfly plate 3 and realizing the opening of the valve.

[0047] Example 4

[0048] See also Figure 1-Figure 11 The butterfly plate 3 is provided with a plurality of small flow through holes 8, and the plurality of small flow through holes 8 are connected to a sealing control component 9 arranged on the first side surface of the butterfly plate 3; the middle section of the valve stem 2 is a worm structure, and the worm structure of the valve stem 2 cooperates with the sealing control component 9, and the shaft of the valve stem 2 passing through the second opening of the side wall of the valve body 1 is connected to a manual control wheel 10 or a motor; the manual control wheel 10 or the motor controls the sealing control component 9 to open or close the plurality of small flow through holes 8 through the valve stem 2.

[0049] The working principle and technical effects of the above technical solution are as follows:

[0050] The present invention provides a two-way three-eccentric butterfly valve. In order to adapt to the transportation of small flow of liquid, a plurality of small flow through holes 8 are specially opened on the butterfly plate 3, and the sealing component 9 is connected to the plurality of small flow through holes 8 opened on the butterfly plate 3. As the sealing component 9 is driven by the valve stem 2, it can open or close the small flow through holes 8. When the sealing component 9 opens the small flow through holes 8, the liquid can flow through these small holes in the valve body 1 to achieve small flow transportation; when the sealing component 9 closes the small flow through holes 8, the liquid cannot pass through these small holes. At this time, if the butterfly plate 3 is in a closed state, the valve will prevent the liquid from flowing. In practical applications, some working conditions may only require the delivery of a small flow of liquid. The flow of a traditional butterfly valve varies greatly when it is fully open or fully closed, making it difficult to accurately control a small flow, and it is relatively laborious to open or close. In order to solve this problem, the present invention opens a plurality of small flow through holes 8 on the butterfly plate 3 and uses a sealing control component 9 for control, thereby being able to achieve precise regulation of a small flow of liquid and meet the use requirements under specific working conditions, so that the bidirectional three-eccentric butterfly valve of the present invention can not only achieve on-off control of a large flow like an ordinary butterfly valve, but also has the function of regulating a small flow, thereby improving the applicability and flexibility of the valve, enabling it to be used in more occasions with different flow requirements, and expanding the application range of the valve; a hand-controlled wheel 10 or a motor is used to control the valve stem 2, and then the sealing control component 9 is driven to operate the small flow through hole 8, which can be operated manually or electrically controlled, so that the operator can make a choice according to the actual situation.

[0051] The sealing and control component 9 includes: a screw rod 901 coaxially rotated on the second side of the butterfly plate 3, a worm wheel 902 fixedly connected to the screw rod 901 meshing with the worm structure of the valve stem 2; the screw rod 901 is adapted to fit in the circular branch hole of the first cone 4 away from the butterfly plate 3, the screw rod 901 passes through the rod body outside the mounting cavity of the first cone 4 and is screwed on a sealing and control slide 903, a plurality of plugging rods 904 are fixedly connected to the sealing and control slide 903, the plurality of plugging rods 904 are connected to a plurality of sealing plugs 905 for opening or closing the small flow through hole 8, a plurality of guide plates 11 are arranged on the first cone 4, each guide plate 11 is slidably arranged in a clamping groove between two adjacent plugging rods 904.

[0052] In a two-way three-eccentric butterfly valve of the present invention, the valve stem 2 not only supports the butterfly plate 3, but also becomes a transmission shaft structure for controlling the sealing component 9 by its relative rotation connection with the butterfly plate 3. The worm gear 902 fixedly connected to the screw rod 901 meshes with the worm structure of the valve stem 2. When the valve stem 2 is controlled to rotate, the worm gear 902 can be meshed with the worm structure to rotate. When the worm gear 902 rotates, the screw rod 901 can be driven to rotate. Since a plurality of guide plates 11 are arranged on the first cone 4, each guide plate 11 is slidably arranged on two adjacent plug support rods 9. 04, so that the multiple guide plates 11 play a guiding and limiting role for the multiple plugging support rods 904, and the multiple plugging support rods 904 will not rotate around the axis of the screw rod 901. Therefore, when the screw rod 901 rotates, it can change its contact position with the sealing slide 903, thereby controlling the sealing slide 903 to drive the multiple plugging support rods 904 to slide in the guide grooves between the multiple guide plates 11, thereby driving the multiple plugs 905 to synchronously open or close the multiple small flow holes 8 through the multiple plugging support rods 904.

[0053] The sealing plug 905 includes: a cylindrical plug fixedly connected to the plug support rod 904 and a conical plug fixedly connected to the cylindrical plug, the diameter of the cylindrical plug is larger than the diameter of the small flow through hole 8; the diameter of the small flow through hole 8 is larger than the diameter of the end of the conical plug away from the cylindrical plug, and smaller than the diameter of the connecting end of the conical plug and the cylindrical plug.

[0054] In the present invention, the valve stem 2 not only assumes the traditional function of supporting the butterfly plate 3, but also serves as the transmission shaft for controlling the sealing component 9, realizing the integration of multiple functions, reducing the number of components inside the valve, simplifying the structure, reducing the complexity and cost of the equipment, and also reducing potential failure points, thereby improving the reliability and stability of the equipment; the worm structure of the valve stem 2 is meshed with the worm wheel 902 to transmit the rotation of the valve stem 2 to the screw rod 901, and the worm and worm wheel transmission has the characteristics of large transmission ratio, stable transmission, and ability to achieve precise control, which can ensure that the sealing component 9 is open to the small flow through hole 8 The accuracy and stability of the opening or closing operation can accurately adjust the amount of small flow through to meet the flow control needs under different working conditions; in the sealing plug 905, the diameter of the cylindrical plug is larger than the diameter of the small flow through hole 8. When the sealing plug 905 closes the small flow through hole 8, the cylindrical plug can completely cover the port of the small flow through hole 8 to form a larger sealing surface, which effectively prevents liquid from leaking from the edge of the through hole and improves the reliability of the seal; the conical plug is connected to the cylindrical plug, and the diameter of the small flow through hole 8 is larger than the diameter of the end of the conical plug away from the cylindrical plug, and smaller than the diameter of the connecting end of the conical plug and the cylindrical plug. In the process of the plug 905 closing the small flow through-hole 8, the conical plug can play a guiding role, making it easier and more accurate to insert the plug 905 into the small flow through-hole 8; at the same time, with the further insertion of the plug 905, the conical plug and the inner wall of the small flow through-hole 8 gradually fit closely, further enhancing the sealing effect and being able to adapt to the sealing requirements under different pressures; the structural design of the plug 905 makes it more flexible in opening and closing the small flow through-hole 8. During the opening process, due to the guiding effect of the conical plug, the plug 905 is easier to pull out of the through-hole; during the closing process, it can also be inserted into the through-hole more smoothly, reducing the resistance and wear during operation, and extending the service life of the plug 905 and the small flow through-hole 8.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A two-way triple-eccentric butterfly valve, characterized in that: include: The valve body, the seal in the valve body rotates to cooperate with the valve stem perpendicular to its axis, and the valve stem is set away from the axis of the valve body; the seal in the valve body rotates to cooperate with the butterfly plate, and the first side and the second side of the butterfly plate are respectively provided with a first cone and a second cone coaxial with it; the valve stem is transferred to the eccentric position of the first cone; the second side of the butterfly plate is connected to the control drive arranged on the valve body, and the butterfly plate rotates along the axis of the valve stem under the drive of the control drive to realize the opening or closing of the valve cavity of the valve body.

2. A two-way triple-eccentric butterfly valve according to claim 1, characterized in that: The control drive includes: a first rod, the first rod is rotated on the second side of the butterfly plate through a first hinge shaft, the first rod is rotated on a transverse axis mechanism through a second hinge shaft, the transverse axis mechanism is slid on a guide bracket in a valve cavity of a valve body, the transverse axis mechanism is movably connected to a second connecting rod, the second connecting rod is rotated on a longitudinal seat, the longitudinal seat is connected to a cylinder shaft of a driving cylinder, the cylinder shaft seal is slidably disposed on a first opening of a side wall of a valve body, and a cylinder barrel of a driving cylinder is mounted on an outer wall of a valve body through a cylinder seat.

3. A two-way triple-eccentric butterfly valve according to claim 2, characterized in that: The connection surface between the longitudinal displacement seat and the cylinder shaft is an outer arc surface that is sealed and fitted with the inner wall of the valve cavity of the valve body.

4. A two-way triple-eccentric butterfly valve according to claim 2, characterized in that: The first hinge shaft and the valve stem are arranged in parallel and are respectively located at two ends of the butterfly plate axis.

5. A two-way triple-eccentric butterfly valve according to claim 4, characterized in that: The inner wall of the valve body and the valve cavity is also provided with an in-place stopper, the first hinge shaft is located between the valve stem and the in-place stopper, and when the butterfly plate closes the valve body and the valve cavity, the first side surface of the butterfly plate contacts and cooperates with the in-place stopper.

6. A two-way triple-eccentric butterfly valve according to claim 2, characterized in that: The transverse shift axis mechanism includes: a transverse shift body coaxially arranged with the second cone, the transverse shift body slidably arranged in the transverse opening of the guide bracket, the transverse shift body is rotatably connected with the second connecting rod, a traction rod is fixed on the side of the transverse shift body close to the second cone, the traction rod is slidably fitted in the transverse shift sleeve, the transverse shift sleeve is hinged to the first rod through the second hinge shaft, the end of the traction rod away from the transverse shift body is fixedly connected to the traction and pressure body, the traction and pressure body is slidably arranged in the axial slideway of the second cone, the butt ring slidably arranged on the traction rod and the transverse shift sleeve are connected by a telescopic spring body sleeved on the traction rod; the butt ring is butt-fitted on the second cone, the butt tube on the butt ring is slidably arranged on the axial slideway of the second cone, and the end of the butt tube away from the butt ring is butt-fitted with the traction and pressure body.

7. A two-way triple-eccentric butterfly valve according to claim 6, characterized in that: An outer tube sleeve for sleeve-mounted on the cylindrical head outside the second cone is also provided on the side of the abutment ring close to the second cone, and the outer tube sleeve is coaxially arranged on the outside of the abutment tube.

8. A two-way triple-eccentric butterfly valve according to claim 1, characterized in that: The butterfly plate is provided with a plurality of small flow through holes, which are connected to a sealing control component arranged on a first side surface of the butterfly plate; the middle section of the valve stem is a worm structure, the worm structure of the valve stem cooperates with the sealing control component, and the shaft of the valve stem passing through the second opening of the side wall of the valve body is connected to a manual control wheel or a motor; the manual control wheel or the motor controls the sealing control component to open or close the plurality of small flow through holes through the valve stem.

9. A two-way triple-eccentric butterfly valve according to claim 8, characterized in that: The sealing and control component includes: a screw rod coaxially rotated on the second side of the butterfly plate, a worm wheel fixedly connected to the screw rod and meshing with the worm structure of the valve stem; the screw rod is adapted to be transferred to the circular branch hole of the first cone away from the butterfly plate, the screw rod passes through the rod body outside the mounting cavity of the first cone and is threadedly connected to a sealing and control slide seat, a plurality of plug support rods are fixedly connected to the sealing and control slide seat, the plurality of plug support rods are connected to a plurality of plugs for opening or closing small flow through holes, a plurality of guide plates are arranged on the first cone, each guide plate is slidably arranged in a clamping groove between two adjacent plug support rods.

10. A two-way triple-eccentric butterfly valve according to claim 9, characterized in that: The sealing plug includes: a cylindrical plug fixedly connected to the plug support rod and a conical plug fixedly connected to the cylindrical plug, the diameter of the cylindrical plug is larger than the diameter of the small flow through hole; the diameter of the small flow through hole is larger than the diameter of the end of the conical plug away from the cylindrical plug, and smaller than the diameter of the connecting end of the conical plug and the cylindrical plug.

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