Butterfly valve

Abstract

The present application relates to butterfly valve technical field, disclose a kind of butterfly valve, including: valve body and butterfly plate being arranged in valve body, still include: limiting convex ring, fixed on the inner wall of valve body;Valve seat, fixed in valve body;Positioning ring, joint in valve body, and with valve seat opposite interface;Reversing piece, rotation setting in valve body;Function box, fixed on valve body;Driving element, fixed in function box;Detection element, fixed in valve seat and function box;Flange, fixed on both sides of valve body;Processor, fixed in function box bottom;Steering cylinder, rotation setting on valve body;Steering sleeve, there are three;The present application can greatly reduce sealing surface friction loss in closing process, realize frictionless high sealing closure;In opening process, sealing surface separation can be effectively avoided scraping, from opening and closing bidirectional protection sealing surface integrity;Can actively prevent sealing failure, realize the automatic sealing compensation without shutdown, without manual intervention, significantly prolong the sealing life and maintenance cycle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of butterfly valves, in particular to a butterfly valve. BACKGROUND

[0002] The existing butterfly valve has significant technical defects in sealing performance and service life, and the core problem is concentrated in the damage of the sealing surface caused by the relative movement of the valve seat and the valve plate and the subsequent water leakage hidden danger.

[0003] The valve plate and the valve seat of the traditional butterfly valve will inevitably have direct friction during opening and closing. There is still local point friction when the valve plate initially contacts the valve seat. Under high pressure working conditions, the friction coefficient between the valve seat and the valve plate is further increased after the valve seat is extruded by the medium pressure. After long-term use, physical damage such as scratches and depressions may occur on the sealing surface, which may reduce the fitting precision of the sealing surface and form a gap.

[0004] The existing butterfly valve lacks a prevention and mitigation mechanism for sealing surface wear. The sealing structure of most butterfly valves is fixedly designed, and the relative position of the valve plate and the valve seat cannot be dynamically adjusted according to the wear condition. Once a small gap appears on the sealing surface, the medium pressure will exacerbate the gap expansion, which may quickly cause water leakage. At the same time, the existing butterfly valve does not integrate an effective sealing state monitoring function. The early wear of the sealing surface is difficult to be detected in time, and maintenance is often required after obvious water leakage occurs. The maintenance process requires shutdown and disassembly, which not only increases the maintenance cost, but also interrupts the normal operation of the fluid conveying system.

[0005] Although some butterfly valves use elastic sealing elements to compensate for small gaps, the elastic elements may be aged and deformed due to long-term friction, medium corrosion or temperature changes, and the compensation capacity may gradually decrease, which cannot maintain the sealing effect for a long time. In addition, the assembly gap between the elastic sealing element and the valve plate and the valve seat is difficult to control accurately, and the assembly error may further exacerbate the friction loss during opening and closing, shorten the service life of the sealing assembly, and cause frequent sealing failure of the butterfly valve, which seriously affects the reliability of the fluid conveying system. SUMMARY

[0006] The present application provides a butterfly valve which can dynamically compensate for water leakage gaps.

[0007] To solve the above technical problems, the technical scheme of the present application is as follows:

[0008] A butterfly valve, comprising a valve body and a butterfly plate arranged in the valve body, further comprising:

[0009] A limiting convex ring is fixed on the inner wall of the valve body; a valve seat is fixed in the valve body; a positioning ring is clamped in the valve body and opposite to the valve seat; a reversing element is rotatably arranged in the valve body; a function box is fixed on the valve body; a driving element is fixed in the function box; a detection element is fixed in the valve seat and the function box; a flange is fixed on both sides of the valve body; and a processor is fixed at the bottom of the function box.

[0010] Turning cylinder, rotationally arranged on the valve body; turning sleeve, provided with three, three said turning cylinder is fixed on the turning cylinder; connecting rod, provided with three, three said connecting rod one end is slidably inserted in the turning sleeve, three said connecting rod the other end is fixed on the butterfly plate; incomplete turbine, fixed above the turning cylinder; transmission rod, rotationally inserted in the turning cylinder below; transmission shaft, slidably inserted in the transmission rod above; internal thread ring, fixed in the turning cylinder; external thread rod, fixed on the transmission shaft, and threaded into the internal thread ring; cone, provided with three, three said cone is fixed on the transmission shaft;

[0011] worm, both ends rotationally arranged in the function box, and meshed with the incomplete turbine; auxiliary shaft, rotationally inserted in the function box bottom; auxiliary turbine, fixed on the auxiliary shaft, and meshed with the worm.

[0012] Further, the reversing piece further comprises:

[0013] The first limiting ring is fixed in the turning cylinder; the second limiting ring is fixed in the turning cylinder; the limiting plate is fixed below the transmission shaft; the downward spring is located below the limiting plate.

[0014] Further, the reversing piece further comprises:

[0015] Octagonal sliding slot, opened in the turning sleeve; octagonal sliding plate, slidably arranged in the octagonal sliding slot, fixed on the connecting rod; limiting strip, fixed in the octagonal sliding slot; reset spring, one end fixed on the octagonal sliding plate, the other end fixed in the turning sleeve; octagonal vertical slot, opened in the transmission rod; octagonal vertical plate, fixed above the transmission shaft, and slidably connected with the octagonal vertical slot.

[0016] Further, the reversing piece further comprises:

[0017] Ridge back groove, opened in the function box bottom; ridge back column, slidably inserted in the ridge back groove below; spring ring seat, fixed above the ridge back column; reset torsion spring, fixed above the incomplete turbine, fixed below the spring ring seat.

[0018] Further, the reversing piece further comprises:

[0019] Support, fixed on the inner wall of the function box; stop cylinder, fixed on the support; stop slot, opened on the incomplete turbine; stop chuck, one end slidably inserted in the stop cylinder, the other end extending into the stop slot; electromagnetic valve, fixed in the stop cylinder; stop spring, one end fixed in the stop cylinder; permanent magnet, fixed on the stop chuck.

[0020] Further, the driving piece further comprises:

[0021] The driving motor is fixed at the bottom of the function box; the first supporting plate is fixed at the bottom of the function box; the first bevel gear pair is fixed with the input end bevel gear on the driving motor and the output end bevel gear on the worm; the second supporting plate is fixed on the inner wall of the function box; and the linkage rod is rotatably arranged in the second supporting plate.

[0022] Further, the driving member further comprises:

[0023] The second bevel gear pair is fixed with the input end bevel gear on the auxiliary shaft and the output end bevel gear on one end of the linkage rod; the third bevel gear pair is fixed with the input end bevel gear on the other end of the linkage rod and the output end bevel gear on the transmission rod; the driving rod is fixed on the worm; and the driving hand wheel is fixed on the driving rod.

[0024] Further, the detection member comprises:

[0025] The detection groove is arranged on the valve seat; the sliding plug plate is slidably arranged in the detection groove; the elastic contact is fixed on the sliding plug plate; the annular plate is slidably arranged in the detection groove; the strain gauge is fixed between the sliding plug plate and the annular plate; the elastic spring is fixed at one end in the detection groove and at the other end on the annular plate; and the encoder is fixed at the bottom of the function box and sleeved on the auxiliary shaft.

[0026] Further, the sealing surface of the butterfly plate is provided with a sealing rubber groove, and the sealing rubber groove is provided with a sealing rubber strip.

[0027] Further, the processor in the execution of the sealing water leakage detection and dynamic compensation sealing specifically comprises the following steps:

[0028] Step 1: Real-time collection of the strain gauge transmission butterfly plate and valve seat sealing surface abutment pressure signal, synchronous collection of the encoder feedback auxiliary shaft initial angle data, construction of the sealing state real-time data set, and comparison of the real-time data set with the preset normal sealing parameters;

[0029] Step 2: The real-time data set shows that the pressure signal is continuously lower than the lower limit of the standard threshold for 10-15 seconds, the processor determines that there is water leakage in the sealing surface, and immediately triggers the dynamic compensation mechanism; the initial compensation amount is calculated based on the difference between the pressure signal and the standard threshold, a control instruction is sent to the driving motor, the worm, the auxiliary turbine and the second bevel gear pair are sequentially driven by the driving motor, and the butterfly plate is further pushed to the valve seat direction for sealing;

[0030] Step 3: In the compensation process, the processor updates the sealing state data set at a frequency of 100 ms / time, and real-time monitors the pressure signal change; when the pressure signal rises to the standard threshold interval within 3 seconds, the processor immediately sends a stop instruction to the driving motor to stop the compensation action, and automatically records the angle, stroke and pressure recovery parameters of this compensation.

[0031] The above-described solution of the present invention has at least the following beneficial effects:

[0032] This invention significantly reduces friction loss on the sealing surface during the closing process, achieving frictionless, high-seal closure. It employs a two-stage process of "rotational alignment – ​​parallel pressure application" constructed through precise control of the worm gear rotation angle. In the first stage, the worm gear drives the incomplete turbine to rotate 90°, influencing the steering cylinder, steering sleeve, and connecting rod, causing the butterfly plate to rotate around the transmission axis to a fully parallel alignment with the valve seat, avoiding direct friction between the sealing surfaces during rotation in traditional butterfly valves. In the second stage, the worm gear synchronously drives the auxiliary turbine, which in turn drives the transmission shaft and the cone to rotate and move axially. The cone pushes the connecting rod through an inclined plane, allowing the butterfly plate to advance axially towards the valve seat while maintaining a parallel posture until the sealing surfaces are in contact, further eliminating friction and improving sealing performance.

[0033] This invention effectively prevents the sealing surface from separating and scratching during the opening process, protecting the integrity of the sealing surface from both opening and closing. Through the "reverse step-by-step disengagement" design: when opening, the worm gear first drives the auxiliary turbine, which drives the transmission shaft and the cone to rise axially. The cone releases the thrust on the connecting rod, allowing the butterfly plate to separate axially from the valve seat. The encoder detects the rotation angle of the auxiliary shaft in real time. After determining that a safe clearance has been formed, the solenoid valve attracts the permanent magnet, which drives the stop chuck to disengage from the stop groove. The reset torsion spring drives the incomplete turbine to contact the worm gear, thereby driving the butterfly plate to rotate 90° to achieve opening. There is no scratching damage to the sealing surface throughout the entire process.

[0034] This invention proactively prevents seal failure, achieving automated seal compensation without downtime or manual intervention, significantly extending seal life and maintenance cycles. Through a "real-time pressure monitoring - dynamic compensation" mechanism: an elastic spring in the detection component provides preload, ensuring the elastic contact remains in contact with the butterfly plate sealing surface; strain gauges capture minute pressure attenuations in real time to identify potential failure risks; when the processor detects an abnormal pressure, it activates the drive motor to precisely rotate the worm gear, which, through the linkage of the auxiliary worm, drive shaft, cone, and connecting rod, drives the butterfly plate further axially towards the valve seat. By adjusting the minute stroke to compensate for wear gaps in the sealing surface, effective contact pressure is restored, thus achieving a seal and preventing leakage. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a butterfly valve provided in an embodiment of the present invention;

[0036] Figure 2 A cross-sectional view of the valve body of a butterfly valve provided in an embodiment of the present invention;

[0037] Figure 3 A butterfly valve provided in an embodiment of the present invention Figure 2 Enlarged view of point A;

[0038] Figure 4An enlarged view of B of the butterfly valve provided for the embodiment of the present application Figure 2 An enlarged view of C of the butterfly valve provided for the embodiment of the present application

[0039] Figure 5 An enlarged view of D of the butterfly valve provided for the embodiment of the present application Figure 2 An enlarged view of E of the butterfly valve provided for the embodiment of the present application

[0040] Figure 6 An enlarged view of D of the butterfly valve provided for the embodiment of the present application Figure 2 An enlarged view of E of the butterfly valve provided for the embodiment of the present application

[0041] Figure 7 A worm structure schematic diagram of the butterfly valve provided for the embodiment of the present application

[0042] Figure 8 An incomplete turbine structure schematic diagram of the butterfly valve provided for the embodiment of the present application

[0043] Figure 9 An enlarged view of E of the butterfly valve provided for the embodiment of the present application Figure 8 An enlarged view of E of the butterfly valve provided for the embodiment of the present application

[0044] Figure 10 A sealing water leakage detection and dynamic compensation sealing flow chart of the butterfly valve provided for the embodiment of the present application

[0045] Explanation of reference signs:

[0046] In the diagram: 1. Valve body; 2. Butterfly plate; 201. Sealing groove; 202. Sealing strip; 3. Limiting ring; 4. Valve seat; 5. Positioning ring; 6. Reversing component; 601. Steering cylinder; 602. Steering sleeve; 603. Connecting rod; 604. Incomplete turbine; 605. Transmission rod; 606. Transmission shaft; 607. Internal threaded ring; 608. External threaded rod; 609. Cone; 601 0. First limiting ring; 6011. Second limiting ring; 6012. Limiting plate; 6013. Downward compression spring; 6014. Octagonal slide groove; 6015. Octagonal sliding plate; 6016. Limiting strip; 6017. Return spring; 6018. Octagonal vertical groove; 6019. Octagonal vertical plate; 6020. Edge return groove; 6021. Edge return post; 6022. Spring ring seat; 6023. Return torsion spring 6024, Bracket; 6025, Stop Cylinder; 6026, Stop Groove; 6027, Stop Clamp; 6028, Solenoid Valve; 6029, Stop Spring; 6030, Permanent Magnet; 7, Function Box; 8, Drive Component; 801, Worm Gear; 802, Auxiliary Shaft; 803, Auxiliary Turbine; 804, Drive Motor; 805, First Support Plate; 806, First Bevel Gear Pair; 807, Second Support Plate; 808, Linkage Rod; 809, Second Bevel Gear Pair; 8010, Third Bevel Gear Pair; 8011, Drive Rod; 8012, Drive Handwheel; 9, Detection Component; 901, Detection Groove; 902, Sliding Plate; 903, Elastic Contact; 904, Annular Plate; 905, Strain Gauge; 906, Elastic Spring; 907, Encoder; 10, Flange; 11, Processor. Detailed Implementation

[0047] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0048] like Figures 1 to 9 As shown, an embodiment of the present invention provides a butterfly valve, comprising: a valve body 1 and a butterfly plate 2 disposed within the valve body 1, and further comprising: a limiting protrusion ring 3 fixed to the inner wall of the valve body 1; a valve seat 4 fixed within the valve body 1; a positioning ring 5 snapped into the valve body 1 and opposite to the valve seat 4; a reversing component 6 rotatably disposed within the valve body 1; a function box 7 fixed to the valve body 1; a driving component 8 fixed within the function box 7; a detection component 9 fixed within the valve seat 4 and the function box 7; a flange 10 fixed to both sides of the valve body 1; and a processor 11 fixed to the bottom of the function box 7. A sealing groove 201 is provided on the sealing surface of the butterfly plate 2, and a sealing strip 202 is provided in the sealing groove 201.

[0049] The steering cylinder 601 is rotationally arranged on the valve body 1; the steering sleeve 602 is provided with three, and the three steering cylinders 601 are fixed on the steering cylinder 601; the connecting rod 603 is provided with three, and one end of the three connecting rods 603 is slidably inserted into the steering sleeve 602, and the other end of the three connecting rods 603 is fixed on the butterfly plate 2; the incomplete turbine 604 is fixed above the steering cylinder 601; the transmission rod 605 is rotationally inserted into the steering cylinder 601 at the lower side; the transmission shaft 606 is slidably inserted into the transmission rod 605 at the upper side; the internal thread ring 607 is fixed in the steering cylinder 601; the external thread rod 608 is fixed on the transmission shaft 606 and is threadedly inserted into the internal thread ring 607; the conical frustum 609 is provided with three, and the three conical frustums 609 are fixed on the transmission shaft 606; the worm 801 is rotationally arranged in the function box 7 at both ends and is engaged with the incomplete turbine 604; the auxiliary shaft 802 is rotationally inserted into the bottom of the function box 7 at the lower side; the auxiliary turbine 803 is fixed on the auxiliary shaft 802 and is engaged with the worm 801.

[0050] Specifically, the valve seat 4 and the positioning ring 5 are fixed together by bolts; the processor 11 mainly processes the sealing water leakage condition of the butterfly plate 2 and the valve seat 4; the teeth of the incomplete turbine 604 can support rotation of 90°; the inclined surface of the conical frustum 609 is used to push the movement of the connecting rod 603 to realize sealing, and the conical frustum 609 needs to have a margin when realizing sealing to facilitate sealing compensation after water leakage; the incomplete turbine 604 and the auxiliary turbine 803 are located on both sides of the worm 801.

[0051] As a preferred embodiment of the present application, the reversing piece 6 further comprises: a first limiting ring 6010 fixed in the steering cylinder 601; a second limiting ring 6011 fixed in the steering cylinder 601; a limiting plate 6012 fixed below the transmission shaft 606; and a downward pressing spring 6013 located below the limiting plate 6012.

[0052] The reversing piece 6 further comprises: an octagonal sliding groove 6014 opened in the steering sleeve 602; an octagonal sliding plate 6015 slidably arranged in the octagonal sliding groove 6014 and fixed on the connecting rod 603; a limiting strip 6016 fixed in the octagonal sliding groove 6014; a reset spring 6017 having one end fixed on the octagonal sliding plate 6015 and the other end fixed in the steering sleeve 602; an octagonal vertical groove 6018 opened in the transmission rod 605; and an octagonal vertical plate 6019 fixed above the transmission shaft 606 and in sliding connection with the octagonal vertical groove 6018.

[0053] The reversing piece 6 further comprises: a prismatic back groove 6020 opened in the bottom of the function box 7; a prismatic back column 6021 slidably inserted into the prismatic back groove 6020 at the lower side; a spring ring seat 6022 fixed above the prismatic back column 6021; and a reset torsional spring 6023 fixed above the incomplete turbine 604 at the upper side and fixed below the spring ring seat 6022 at the lower side.

[0054] The reversing piece 6 further comprises a support 6024 fixed to the inner wall of the function box 7, a stop cylinder 6025 fixed to the support 6024, a stop groove 6026 formed on the incomplete turbine 604, a stop clamp 6027 slidably inserted into the stop cylinder 6025 at one end and extending into the stop groove 6026 at the other end, an electromagnetic valve 6028 fixed to the stop cylinder 6025, a stop spring 6029 fixed to the stop cylinder 6025 at one end, and a permanent magnet 6030 fixed to the stop clamp 6027.

[0055] Specifically, the pressing spring 6013 is used for elastically supporting the transmission shaft 606, and there is no connection between the pressing spring 6013 and the transmission shaft 606, and the limiting plate 6012 is located in the first limiting ring 6010 and the second limiting ring 6011, and is used for limiting the movement range of the limiting plate 6012.

[0056] As a preferred embodiment of the present application, the driving piece 8 further comprises a driving motor 804 fixed to the inner bottom of the function box 7, a first support plate 805 fixed to the inner bottom of the function box 7, a first bevel gear pair 806 with an input end bevel gear fixed to the driving motor 804 and an output end bevel gear fixed to the worm 801, a second support plate 807 fixed to the inner wall of the function box 7, and a linkage rod 808 rotatably arranged in the second support plate 807.

[0057] The driving piece 8 further comprises a second bevel gear pair 809 with an input end bevel gear fixed to the auxiliary shaft 802 and an output end bevel gear fixed to one end of the linkage rod 808, a third bevel gear pair 8010 with an input end bevel gear fixed to the other end of the linkage rod 808 and an output end bevel gear fixed to the transmission rod 605, a driving rod 8011 fixed to the worm 801, and a driving handle 8012 fixed to the driving rod 8011.

[0058] Specifically, the opening and closing of the butterfly plate 2 in the valve body 1 has a manual and automatic double control mode: the staff can directly control the opening and closing by manually rotating the driving handle 8012, or can control the driving motor 804 to drive to realize the opening and closing by issuing instructions through the processor 11.

[0059] When the butterfly plate 2 and the valve seat 4 leak, the processor 11 will trigger an alarm, which can be handled in two ways: one is manual intervention, manually rotating the driving handle 8012 to adjust until the alarm is removed; the other is automatic compensation, which is completed by the processor 11 controlling the driving motor 804 to adjust and compensate the leakage.

[0060] As a preferred embodiment of the present application, the detection member 9 comprises: a detection groove 901 formed on the valve seat 4; a sliding plug plate 902 slidingly arranged in the detection groove 901; an elastic contact 903 fixed on the sliding plug plate 902; an annular plate 904 slidingly arranged in the detection groove 901; a strain gauge 905 fixed between the sliding plug plate 902 and the annular plate 904; an elastic spring 906 having one end fixed in the detection groove 901 and the other end fixed on the annular plate 904; and an encoder 907 fixed on the bottom of the function box 7 and sleeved on the auxiliary driving shaft 802.

[0061] Specifically, the encoder 907 is used to detect the number of turns and the angle of rotation of the auxiliary driving shaft 802, and the strain gauge 905 is used to detect the force applied by the sealing surface of the butterfly plate 2 on the elastic contact 903.

[0062] When the flange 10 of the butterfly valve is connected to a transportation pipeline, the butterfly valve has two driving modes, i.e., manual driving and automatic driving. In the manual driving mode, the driving hand wheel 8012 is directly rotated to drive the worm 801. In the automatic driving mode, the driving motor 804 is started to drive the first bevel gear pair 806 to rotate, and the output end bevel gear of the first bevel gear pair 806 drives the worm 801 to rotate. By controlling the forward rotation or reverse rotation of the worm 801, the opening and closing actions of the butterfly valve can be realized.

[0063] When the butterfly valve enters the closed state, the worm 801 rotates forward, the worm 801 meshes with the incomplete turbine 604 and drives the incomplete turbine 604 to rotate by 90°, and after rotating by 90°, the incomplete turbine 604 is disengaged from the meshing contact with the worm 801. During the rotation of the incomplete turbine 604, the return torsional spring 6023 is twisted to tighten the return torsional spring 6023, and the prismatic column 6021 and the spring ring seat 6022 move upward along the prismatic groove 6020 to adapt to the tightening state of the return torsional spring 6023. During the rotation of the incomplete turbine 604 by 90°, the stopper clamp 6027 slides along the outer surface of the incomplete turbine 604, and when the incomplete turbine 604 rotates to the 90° position, the stopper spring 6029 elastically pushes the stopper clamp 6027 to extend into the stopper groove 6026, thereby limiting the rotation of the incomplete turbine 604. When the incomplete turbine 604 rotates by 90°, the rotation of the steering cylinder 601 is simultaneously driven, the steering cylinder 601 drives the three steering sleeves 602 to swing by 90°, each steering sleeve 602 drives the corresponding connecting rod 603 to swing, and the three connecting rods 603 jointly drive the butterfly plate 2 to swing to the state of being parallel to the valve seat 4.

[0064] The worm 801 rotates in the positive direction, and drives the auxiliary turbine 803 to rotate, the auxiliary turbine 803 drives the auxiliary shaft 802 to rotate, the auxiliary shaft 802 drives the second bevel gear pair 809 to rotate, the output end bevel gear of the second bevel gear pair 809 drives the linkage rod 808 to rotate, the linkage rod 808 drives the third bevel gear pair 8010 to rotate, the output end bevel gear of the third bevel gear pair 8010 drives the transmission rod 605 to rotate, and the transmission rod 605 drives the transmission shaft 606 to rotate; when the transmission shaft 606 rotates, the external thread rod 608 moves downward along the internal thread ring 607 in a spiral manner, and the octagonal vertical plate 6019 above the transmission shaft 606 slides downward along the octagonal vertical groove 6018 in the transmission rod 605 to cooperate with the spiral transmission of the external thread rod 608 and the internal thread ring 607; the transmission shaft 606 drives the three conical tables 609 to rotate synchronously and move downward, the conical table 609 pushes the connecting rod 603 outward through the inclined surface to the outside of the rotating sleeve 602, the limiting plate 6012 below the transmission shaft 606 slides along the octagonal sliding groove 6014, the octagonal sliding plate 6015 compresses the return spring 6017, and finally the three connecting rods 603 jointly drive the butterfly plate 2 to move to the valve seat 4 direction to realize closing.

[0065] In the process of moving the butterfly plate 2 to the valve seat 4 to close, the sealing surface of the butterfly plate 2 contacts the elastic contact 903 and pushes the sliding plug plate 902 to slide along the detection groove 901; the force received by the elastic contact 903 is transmitted to the sliding plug plate 902, the sliding plug plate 902 applies the force to the strain sheet 905, the strain sheet 905 transmits the force to the annular plate 904, and the annular plate 904 compresses the elastic spring 906; until the sealing surface of the butterfly plate 2 fully contacts the sealing surface of the valve seat 4, an effective seal is formed.

[0066] When the butterfly valve enters the open state, the worm 801 reverses, the worm 801 first drives the auxiliary turbine 803 to rotate, at this time the incomplete turbine 604 does not mesh with the worm 801; the auxiliary turbine 803 drives the auxiliary shaft 802 to rotate, the auxiliary shaft 802 drives the second bevel gear pair 809 to rotate, the second bevel gear pair 809 drives the linkage rod 808 to rotate, the linkage rod 808 drives the third bevel gear pair 8010 to rotate, the third bevel gear pair 8010 drives the transmission rod 605 to rotate, the transmission rod 605 drives the transmission shaft 606 and the external thread rod 608 to rotate; the external thread rod 608 is screwed with the internal thread ring 607, drives the transmission shaft 606 and the three tapered tables 609 to move upward spirally; the tapered table 609 no longer abuts against the connecting rod 603, the reset spring 6017 is reset and drives the octagonal slide plate 6015 and the connecting rod 603 to shrink into the inside of the steering sleeve 602, the connecting rod 603 drives the butterfly plate 2 to separate from the valve seat 4, so that the butterfly plate 2 and the valve seat 4 keep a spacing and are parallel; the encoder 907 is fixedly sleeved on the auxiliary shaft 802, the rotation angle of the auxiliary shaft 802 is detected through the encoder 907, so that the remaining rotation angle of the worm 801 is judged; when the remaining rotation angle is 90°, the electromagnetic valve 6028 is started, the electromagnetic valve 6028 generates a magnetic force to attract the permanent magnet 6030, the permanent magnet 6030 drives the stop clamp 6027 to retract into the stop cylinder 6025, the stop clamp 6027 separates from the stop groove 6026, and the rotation of the incomplete turbine 604 is no longer limited; the incomplete turbine 604 is twisted and reset under the reset action of the reset torsional spring 6023, the teeth are repositioned on the worm 801, the worm 801 reverses to drive the incomplete turbine 604 to rotate 90°, and part of the teeth of the incomplete turbine 604 remains on the worm 801 after rotation, so as to wait for the next start; when the incomplete turbine 604 rotates 90°, the steering cylinder 601, the steering sleeve 602, the connecting rod 603 and the butterfly plate 2 are synchronously rotated 90°, and the butterfly valve reaches the open state.

[0067] The butterfly valve controls the rotation angle of the worm 801 accurately, constructs a double-stage accurate control process of "rotation alignment-parallel pressure application", and realizes step-by-step regulation of the closed state of the butterfly plate 2: in the first stage, the butterfly plate 2 rotates 90° around the transmission axis first, is accurately adjusted to an alignment state of being completely parallel to the valve seat 4, and avoids frictional wear of the sealing surface in the rotation process of the traditional butterfly valve; in the second stage, on the basis of keeping the parallel posture, the butterfly plate 2 is pushed forward in the axial direction, gradually approaches the valve seat 4, and until the sealing surface is completely attached, a closed effect of no friction and high sealing is formed.

[0068] The opening process of the butterfly valve adopts a "reverse step-by-step separation" design: the butterfly plate 2 and the valve seat 4 are first stably separated by keeping a parallel posture through axial driving, and the scraping damage of the sealing surface when separated is eliminated; after a safe gap is formed between the butterfly plate 2 and the valve seat 4, the butterfly plate 2 is driven to rotate 90°, and the flow channel is completely opened, thereby protecting the sealing surface from damage.

[0069] The sealing failure problem that is prone to occur in the long-term use of the butterfly valve is broken through the traditional passive maintenance mode, and the active protection mechanism of "real-time pressure monitoring-dynamic compensation" is integrated: when the sealing surface of the butterfly plate 2 and the valve seat 4 is internally leaked due to wear and deformation, and the contact pressure of the two is reduced or the sealing gap is increased, the elastic contact 903 in the detection piece 9 is always in abutment with the sealing surface of the butterfly plate 2 under the pre-tightening force of the elastic spring 906, and at this time the strain gauge 905 can capture the slight attenuation change of the abutment pressure in real time, and identify the sealing failure risk in the first time.

[0070] When the pressure anomaly is detected, the system immediately triggers the adaptive dynamic compensation sealing mechanism: the driving motor 804 is started, the worm 801 is driven to rotate accurately by the driving motor 804, and then the butterfly plate 2 is driven to further advance along the axial direction to the valve seat 4, through the accurate control of the small stroke, the gap caused by the wear of the sealing surface is compensated, the effective contact pressure of the butterfly plate 2 and the valve seat 4 is restored, the automatic sealing compensation without shutdown and manual intervention is realized, and the sealing life and maintenance cycle of the butterfly valve are significantly prolonged.

[0071] As shown in Figure 10 , a butterfly valve, a processor 11 is used to perform sealing water leakage detection and dynamic compensation, specifically including the following steps:

[0072] Step 1: Real-time acquisition of the abutment pressure signal of the sealing surface of the butterfly plate 2 and the valve seat 4 transmitted by the strain gauge 905, synchronous acquisition of the initial angle data of the auxiliary drive shaft 802 fed back by the encoder 907, construction of the sealing state real-time data set, and comparison of the real-time data set with the preset normal sealing parameters;

[0073] Step 2: The real-time data set shows that the pressure signal is below the lower limit of the standard threshold for 10-15 seconds, the processor 11 determines that there is water leakage in the sealing surface, and immediately triggers the dynamic compensation mechanism; based on the difference between the pressure signal and the standard threshold, the initial compensation amount is calculated, the control instruction is sent to the driving motor 804, the worm 801, the auxiliary drive turbine 803 and the second bevel gear pair 809 are driven in turn by the driving motor 804, and the butterfly plate 2 is further pushed to the valve seat 4 direction to seal;

[0074] Step 3: During the compensation process, the processor 11 updates the sealing state data set at a frequency of 100ms / time, and monitors the change of the pressure signal in real time; when the pressure signal rises to the standard threshold interval within 3 seconds, the processor 11 immediately sends a stop instruction to the driving motor 804 to stop the compensation action, and automatically records the angle, stroke and pressure recovery parameters of this compensation.

[0075] In the case of Example 1, when the butterfly valve is used to transport clean water with a pressure of 1.0 MPa, the processor 11 continuously executes the sealing water leakage detection and dynamic compensation process: the processor 11 collects the sealing surface abutment pressure signal of the butterfly plate 2 and the valve seat 4 transmitted by the strain gauge 905 in the detection member 9 in real time (sampling frequency 50 Hz), synchronously acquires the initial angle data of the auxiliary driving shaft 802 fed back by the encoder 907 (initial angle 18.0°), thereby constructing a real-time data set of the sealing state, and comparing it with the preset normal sealing parameters (standard pressure threshold interval 0.8-1.2 MPa, auxiliary driving shaft angle deviation allowable range ±0.5°).

[0076] When the real-time data set shows that the sealing surface abutment pressure signal continuously decays from 0.95 MPa to 0.72 MPa, and this low pressure state is continuously maintained for 12 seconds (within the 10-15 second judgment interval), the processor 11 immediately determines that the sealing surface leaks due to slight wear of the sealing rubber strip 202, and triggers the dynamic compensation mechanism; based on the difference (0.08 MPa) between the pressure signal and the lower limit of the standard threshold (0.8 MPa), and in combination with the preset “pressure-stroke” conversion coefficient (0.65 MPa / mm, consistent with the nonlinear relationship between the pressure and compression amount of the rubber sealing member), the processor 11 calculates that the initial compensation amount of the pushing stroke of the butterfly plate 2 is 0.12 mm, and then sends a pulse control instruction to the driving motor 804 (rated output speed 150 r / min, reduction ratio 20:1) of the driving member 8; after the driving motor 804 is started, the power is transmitted to the worm 801 (lead 5 mm) through the first bevel gear pair 806, the worm 801 engages to drive the auxiliary driving turbine 803 (number of teeth 40) and the auxiliary driving shaft 802 to rotate, and then sequentially drives the second bevel gear pair 809, the linkage rod 808, and the third bevel gear pair 8010 (transmission ratio 1:1) to drive the transmission rod 605 and the transmission shaft 606 to rotate synchronously; the outer threaded rod 608 on the transmission shaft 606 cooperates with the inner threaded ring 607 (thread pitch 2 mm) to convert the rotary motion into axial movement, and finally pushes the connecting rod 603 through the three tapered surfaces 609 (inclination angle 15°) to make the butterfly plate 2 accurately push towards the valve seat 4 by 0.12 mm to enhance the sealing.

[0077] During the compensation process, the processor 11 updates the sealing state data set at a frequency of 100 ms / time, and monitors the pressure signal changes in real time: at 0.8 seconds after the compensation starts, the pressure rises to 0.78 MPa; at 1.8 seconds, the pressure reaches 0.8 MPa (lower limit of the standard threshold); at 2.5 seconds, the pressure stabilizes at 0.85 MPa (within the standard threshold interval), at this time, only 2.5 seconds (less than the 3-second determination threshold) from the start of compensation, the processor 11 immediately sends a stop command to the drive motor 804, terminates the compensation action, and automatically records the compensation parameters this time - the final angle of the auxiliary shaft 802 is 18.9° (cumulative rotation 0.9°, matched with transmission: worm rotation 36°→auxiliary shaft rotation 36°÷(360° / 40)=0.9°, corresponding to transmission shaft rotation 0.1 turn→propulsion amount 0.1×2 mm=0.2 mm, actual propulsion after conversion by conical surface 0.12 mm, error ±0.01 mm), pressure recovery curve (average rate of rising from 0.72 MPa to 0.85 MPa 0.052 MPa / s), completing a sealing compensation closed-loop control, the entire process does not require shutdown, and the medium conveying is not affected.

[0078] The above is a preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered within the scope of protection of the present application.

Claims

1. A butterfly valve, comprising: The valve body and the butterfly plate arranged in the valve body are characterized in that further comprising: The limiting convex ring is fixed on the inner wall of the valve body; the valve seat is fixed in the valve body; the positioning ring is clamped in the valve body and is opposite to the valve seat; the reversing element is rotatably arranged in the valve body; the function box is fixed on the valve body; the driving element is fixed in the function box; the detection element is fixed in the valve seat and the function box; the flange is fixed on both sides of the valve body; the processor is fixed at the bottom of the function box; The steering cylinder is rotatably arranged on the valve body; the steering sleeve is provided with three steering cylinders, and the three steering cylinders are fixed on the steering cylinder; the connecting rod is provided with three connecting rods, one end of the three connecting rods is slidably inserted into the steering sleeve, and the other end of the three connecting rods is fixed on the butterfly plate; the incomplete turbine is fixed above the steering cylinder; the transmission rod is rotatably inserted into the steering cylinder at the bottom; the transmission shaft is slidably inserted into the transmission rod at the top; the internal thread ring is fixed in the steering cylinder; the external thread rod is fixed on the transmission shaft and is threadedly inserted into the internal thread ring; the conical frustum is provided with three conical frustums, and the three conical frustums are fixed on the transmission shaft; The reversing element further comprises: the limiting plate is fixed below the transmission shaft; the downward pressing spring is located below the limiting plate; the octagonal vertical slot is formed in the transmission rod; the octagonal vertical plate is fixed above the transmission shaft and is in sliding connection with the octagonal vertical slot; The worm is rotatably arranged at both ends of the function box and is in engagement with the incomplete turbine; the auxiliary driving shaft is rotatably inserted into the bottom of the function box; the auxiliary driving turbine is fixed on the auxiliary driving shaft and is in engagement with the worm; the driving motor is fixed at the bottom of the function box; The driving element further comprises: the second supporting plate is fixed on the inner wall of the function box; the linkage rod is rotatably arranged in the second supporting plate; the second bevel gear pair is provided with an input end bevel gear fixed on the auxiliary driving shaft and an output end bevel gear fixed on one end of the linkage rod; The detection element comprises: the detection groove is formed on the valve seat; the sliding plug plate is slidably arranged in the detection groove; the elastic contact is fixed on the sliding plug plate; the annular plate is slidably arranged in the detection groove; the strain gauge is fixed between the sliding plug plate and the annular plate; the elastic spring has one end fixed in the detection groove and the other end fixed on the annular plate; the encoder is fixed at the bottom of the function box and is sleeved on the auxiliary driving shaft; The processor in the sealing water leakage detection and dynamic compensation sealing, specifically comprising the following steps: Step 1: Real-time acquisition of the strain gauge transmission butterfly plate and valve seat sealing surface abutment pressure signal, synchronous acquisition of the encoder feedback auxiliary driving shaft initial angle data, construction of sealing state real-time data set, and comparison of real-time data set with preset normal sealing parameters; Step 2: The real-time data set shows that the pressure signal is continuously lower than the lower limit of the standard threshold for 10-15 seconds, the processor determines that there is water leakage in the sealing surface, and immediately triggers the dynamic compensation mechanism; the initial compensation amount is calculated based on the difference between the pressure signal and the standard threshold, a control instruction is sent to the driving motor, the worm, the auxiliary driving turbine and the second bevel gear pair are driven in turn through the driving motor, and the butterfly plate is further pushed to the valve seat direction for sealing. Step 3: In the compensation process, the processor updates the sealing state data set at a frequency of 100 ms / time, and monitors the pressure signal change in real time; when the pressure signal rises to the standard threshold interval within 3 seconds, the processor immediately sends a stop command to the driving motor to stop the compensation action, and automatically records the angle, stroke and pressure recovery parameters of this compensation.

2. The butterfly valve of claim 1, wherein, The reversing piece further comprises: The first limiting ring is fixed in the steering cylinder, and the second limiting ring is fixed in the steering cylinder.

3. A butterfly valve according to claim 2, wherein The reversing piece further comprises: The octagonal slide slot is arranged in the steering sleeve, the octagonal slide plate is slidably arranged in the octagonal slide slot and fixed on the connecting rod, the limiting strip is fixed in the octagonal slide slot, and the reset spring is fixed at one end on the octagonal slide plate and at the other end in the steering sleeve.

4. A butterfly valve according to claim 3, wherein The reversing piece further comprises: The ridge return groove is arranged at the bottom of the function box, the ridge return column is slidably inserted into the ridge return groove, the spring ring seat is fixed above the ridge return column, and the reset torsion spring is fixed at the top on the incomplete turbine and at the bottom on the spring ring seat.

5. A butterfly valve according to claim 4, wherein The reversing piece further comprises: The bracket is fixed on the inner wall of the function box, the stop cylinder is fixed on the bracket, the stop groove is arranged on the incomplete turbine, one end of the stop clamp is slidably inserted into the stop cylinder, and the other end extends into the stop groove, the electromagnetic valve is fixed in the stop cylinder, one end of the stop spring is fixed in the stop cylinder, and the permanent magnet is fixed on the stop clamp.

6. The butterfly valve of claim 1, wherein, The driving piece further comprises: The first support plate is fixed at the bottom of the function box, and the first bevel gear pair is arranged with the input end bevel gear fixed on the driving motor and the output end bevel gear fixed on the worm.

7. A butterfly valve according to claim 6, wherein The driving piece further comprises: The third bevel gear pair is arranged with the input end bevel gear fixed on the other end of the linkage rod and the output end bevel gear fixed on the transmission rod, the driving rod is fixed on the worm, and the driving hand wheel is fixed on the driving rod.

8. The butterfly valve of claim 1, wherein, The butterfly plate sealing surface is provided with a sealing rubber groove, and the sealing rubber groove is provided with a sealing rubber strip.

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