Butterfly valve with cleaning structure and monitoring control system thereof

Abstract

The application provides a butterfly valve with a cleaning structure and a monitoring control system thereof, and relates to the technical field of valves.The butterfly valve comprises a valve body, an inner valve, an opening and closing driving assembly and a cleaning mechanism.The cleaning mechanism comprises a cleaning power source, a heating medium conveying hose, a blowdown conveying hose and an open cleaning ring assembly.The cleaning power source comprises a heat energy input assembly and a negative pressure generating assembly.The open cleaning ring assembly is slidably connected to the inner wall of the valve body in the axial direction of the valve body.The two tar suction ends of the open cleaning ring assembly are located at the bottom of the inner wall of the valve body.The design of the cleaning mechanism achieves all-round and movable cleaning of the inner wall of the valve body, the butterfly plate and the valve seat without disassembling the valve and affecting the normal opening and closing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of valves, and particularly relates to a butterfly valve with a cleaning structure and a monitoring control system thereof. BACKGROUND

[0002] In the coking industry, butterfly valves are widely used in coke oven gas pipeline systems for adjusting medium flow. However, due to the fact that coke oven gas contains a large amount of tar, dust and other viscous substances, these impurities are extremely easy to deposit on the inside of the valve body, the surface of the butterfly plate and the sealing surface of the valve seat and gradually condense and solidify to form hard tar residues when flowing through the valve. The tar residues not only cause the sealing performance of the butterfly valve to decrease, causing medium leakage, but also significantly increase the rotating resistance of the butterfly plate, and in severe cases, even cause the valve to "lock", completely unable to open and close, directly affecting the safe and stable operation of the production system.

[0003] To solve the above problems, the following cleaning methods are mainly used in the prior art:

[0004] (1) External heating: that is, a heating jacket or an electric heating band is arranged outside the valve body, and the tar is softened by overall heating. This method cannot accurately act on the accumulation position, the heat transfer efficiency is low, and it cannot remove the solidified tar residues. Moreover, it has no direct cleaning effect on the butterfly plate and the valve seat.

[0005] (2) Fixed flushing: that is, fixed flushing nozzles are installed at specific positions of the valve body, and steam or solvent is periodically injected for spraying. In order to avoid mechanical interference between the butterfly plate and the nozzles when the valve is opened and closed, the nozzles must be installed at non-interference positions away from the sealing area of the butterfly plate and the valve seat, which greatly limits the spraying path and coverage range of the flushing fluid, making it difficult to effectively act on the valve seat sealing surface and the butterfly plate surface where tar accumulates most seriously. There is an obvious cleaning blind area. At the same time, this method can only disperse or temporarily soften part of the tar, and cannot completely remove it from the valve cavity. The flushed tar will still deposit at the bottom of the valve cavity, which may re-enter the sealing surface with the medium, and ultimately still needs to be manually cleaned after the valve is disassembled, failing to achieve the fundamental purpose of automatic cleaning.

[0006] (3) Manual cleaning after disassembly: that is, after the valve is disassembled from the pipeline, mechanical scraping, high-pressure water jet or chemical soaking are used for cleaning. This method must interrupt production, is time-consuming and labor-intensive, and the cleaning effect depends on manual experience, which may damage the precision sealing surface.

[0007] Therefore, there is an urgent need for a butterfly valve that can clean the inside wall of the valve body, the butterfly plate and the valve seat in a full range and movable manner without disassembling the valve and affecting normal opening and closing. SUMMARY

[0008] The application provides a butterfly valve with a cleaning structure and a monitoring control system thereof to solve at least one of the above technical problems.

[0009] To solve the above technical problems, the application discloses a butterfly valve with a cleaning structure and a monitoring control system thereof, which comprises a valve body, a valve inner part and an opening and closing driving assembly.

[0010] The cleaning mechanism comprises a cleaning power source, a heating medium conveying hose, a sewage conveying hose and an opening cleaning ring assembly, the cleaning power source comprises a heat energy input assembly and a negative pressure generating assembly, the input end of the heating medium conveying hose is communicated with the discharge end of the heat energy input assembly, the output end of the sewage conveying hose is communicated with the suction end of the negative pressure generating assembly, the output end of the heating medium conveying hose and the input end of the sewage conveying hose are both communicated with the opening cleaning ring assembly, the opening cleaning ring assembly is slidably connected to the inner wall of the valve body along the axial direction of the valve body, the two tar suction ends of the opening cleaning ring assembly are both located at the bottom of the inner wall of the valve body, and the opening cleaning ring assembly is used for spraying the heating medium to the inner wall of the valve body, the surface of the butterfly plate of the valve inner part and the surface of the valve seat and sucking out the tar accumulated at the bottom of the inner wall of the valve body.

[0011] Preferably, the valve inner part comprises a valve shaft, the valve shaft is fixedly connected to the output end of the opening and closing driving assembly, the butterfly plate is fixedly connected to the valve shaft, a filler cavity is formed at the part where the valve shaft penetrates through the valve body, the filler cavity is filled with filler, a filler sealing assembly is arranged above the filler, and the filler sealing assembly is used for applying axial pressure to the filler to make it expand radially and tightly fit the valve shaft and the valve body.

[0012] The valve seat is fixedly connected to the valve body, and the valve seat is used for sealingly cooperating with the end surface of the butterfly plate when the opening and closing driving assembly drives the butterfly plate to rotate to the closed position.

[0013] Preferably, the cleaning mechanism further comprises a transmission assembly mounting box, the transmission assembly mounting box is fixedly connected to the valve body, the transmission assembly mounting box is provided with a cleaning transmission assembly, the output end of the cleaning transmission assembly is fixedly connected to the opening cleaning ring assembly, and the cleaning transmission assembly is used for driving the opening cleaning ring assembly to reciprocatingly slide along the axial direction of the valve body.

[0014] Preferably, the cleaning transmission assembly comprises a transmission motor fixedly connected to the transmission assembly mounting box, a dial fixedly connected to an output end of the transmission motor, a rotating shaft one and a rotating shaft two rotatably connected to the transmission assembly mounting box, a Geneva wheel and a bevel gear one fixedly connected to the rotating shaft one, a dial pin fixedly connected to the dial, a plurality of radial dial sliding grooves formed in the Geneva wheel, the dial pin being configured to intermittently slide with the radial dial sliding grooves, a bevel gear two and a displacement transmission gear fixedly connected to the rotating shaft two, the bevel gear two being configured to mesh with the bevel gear one, a displacement transmission rack slidably connected to a side wall of an axial guide sliding cavity of the valve body, the displacement transmission gear being configured to mesh with the displacement transmission rack, and the open cleaning ring assembly being fixedly connected to the displacement transmission rack.

[0015] Preferably, the output end of the transmission motor is further fixedly connected to a pipe winding roller, and a region of a middle portion of the pipe winding roller is divided by a region dividing piece into a heating medium conveying hose winding area and a pollution conveying hose winding area.

[0016] A side wall of the transmission assembly mounting box is provided with a heating medium conveying hose connecting pipe one and a pollution conveying hose connecting pipe one, an input end of the heating medium conveying hose is communicated with the heating medium conveying hose connecting pipe one, and then wound around the heating medium conveying hose winding area, and then penetrates through a guide pipe cylinder one on the valve body to be communicated with a heating medium conveying hose connecting pipe two on the open cleaning ring assembly; an output end of the pollution conveying hose is communicated with the pollution conveying hose connecting pipe one, and then wound around the pollution conveying hose winding area, and then penetrates through a guide pipe cylinder two on the valve body to be communicated with a pollution conveying hose connecting pipe two on the open cleaning ring assembly.

[0017] Preferably, the open cleaning ring assembly comprises a reciprocating sliding block and an open cleaning ring body, the open cleaning ring body penetrates through and is fixedly connected to the reciprocating sliding block, the reciprocating sliding block is fixedly connected to the displacement transmission rack, an inner wall of the valve body is provided with an axial guide sliding cavity, the reciprocating sliding block is slidably connected to a side wall of the axial guide sliding cavity, the open cleaning ring body is provided with a heating medium injection ring pipeline and a tar suction pipeline, the heating medium injection ring pipeline and the tar suction pipeline are respectively communicated with the heating medium conveying hose and the pollution conveying hose through a heating medium conveying hose connecting pipe two and a pollution conveying hose connecting pipe two on the reciprocating sliding block.

[0018] Preferably, a corresponding part of the heating medium injection ring pipeline on the open cleaning ring body is provided with a plurality of conical spiral nozzles and two pairs of symmetrical injection ring plates, a plurality of uniformly arranged conical injection channels are formed in the injection ring plates, the conical injection channels and the conical spiral nozzles are communicated with the heating medium injection ring pipeline, and a one-way control valve is arranged in each of the conical injection channels and the conical spiral nozzles.

[0019] A corresponding part of the tar suction pipeline on the open cleaning ring body is provided with two pairs of symmetrical flow guide scrapers, an upper arc flow guide groove and a lower arc flow guide groove are formed in the flow guide scrapers.

[0020] This invention provides a monitoring and control system for controlling a butterfly valve with a cleaning structure as described in any one of Examples 1-7, comprising:

[0021] The tar region recognition module is used to acquire three-dimensional point cloud data of the inner surface of the valve body and to identify the tar accumulation area in the valve body through a trained tar region recognition model. The three-dimensional point cloud data of the inner surface of the valve body includes the three-dimensional point cloud data of the inner wall of the valve body, the surface of the butterfly plate, and the surface of the valve seat.

[0022] The cleaning difficulty quantification module is used to divide each tar accumulation area into several grid unit areas, obtain the feature parameters of each grid unit area, form the feature vector corresponding to each grid unit area based on the feature parameters of each grid unit area, and construct the cleaning difficulty quantification matrix corresponding to each tar accumulation area based on the feature vector corresponding to each grid unit area. The feature parameters include the tar residue accumulation area, average tar residue accumulation thickness, maximum tar residue accumulation thickness, tar residue surface roughness, and average temperature of each grid unit area.

[0023] The cleaning strategy determination module compares the cleaning difficulty quantification matrix corresponding to each tar accumulation area with the benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library, selects the benchmark cleaning difficulty quantification matrix with the highest matching degree with the cleaning difficulty quantification matrix corresponding to the current tar accumulation area, and determines the cleaning strategy for the current tar accumulation area based on the cleaning strategy corresponding to the benchmark cleaning difficulty matrix with the highest matching degree.

[0024] Preferably, the formula for calculating the matching degree between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library is as follows:

[0025] ;in, This represents the degree of matching between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the value in the i-th row and j-th column of the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the value in the i-th row and j-th column of the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the total number of rows in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the total number of columns in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area.

[0026] Preferred options also include:

[0027] The cleaning effect feedback and correction module is used to reacquire image data of each tar accumulation area after each cleaning action. Based on the image data of each tar accumulation area and the trained cleaning evaluation model, the cleaning effect of each tar accumulation area is evaluated, and the cleaning effect evaluation value corresponding to each tar accumulation area is obtained. If the cleaning effect evaluation value exceeds the set threshold, the cleaning strategy is automatically optimized.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) This invention achieves precise heat delivery and efficient utilization by directly spraying the heating medium onto the inner wall of the valve body, the surface of the butterfly plate and the valve seat where tar is most severely accumulated. This overcomes the disadvantages of low thermal efficiency and poor performance of external heating. At the same time, the design of the opening cleaning ring assembly sliding along the valve body axis allows its cleaning range to cover the entire length of the valve cavity and can flexibly avoid the butterfly plate by moving. The ring design of the opening cleaning ring assembly covers the circumference of the inner wall of the valve body in all directions, which completely solves the problem of cleaning blind spots caused by the avoidance of fixed nozzles. The integrated process of heating softening and negative pressure suction of this invention can be completed automatically without stopping the valve or disassembling it, avoiding the production interruption and sealing surface damage risks caused by traditional manual cleaning, and greatly improving maintenance efficiency and safety.

[0030] (2) This invention utilizes the intermittent motion characteristics of the Geneva mechanism to mechanically reserve sufficient dwell heating time for tar melting, ensuring that the tar is fully softened before scraping. This method is more efficient and more thorough than continuous scanning cleaning. Sufficient melting time means that the cleaning effect can be achieved with relatively lower heating medium flow rate or temperature, saving energy. At the same time, mechanical intermittent transmission is more reliable than complex electronic timing control and more adaptable to the harsh environment of industrial sites. Through the combination of dial, Geneva, bevel gear one, bevel gear two, displacement transmission gear and displacement transmission rack, the continuous rotation of the transmission motor is transformed into a stable and precise intermittent linear feed of the open cleaning ring assembly. The stroke of each scraping is fixed and controllable, ensuring the stability and repeatability of the cleaning process.

[0031] (3) Through the linkage design of the winding roller and the opening cleaning ring assembly, the present invention realizes the automatic retraction and extension of the length of the heating medium conveying hose and the sewage conveying hose as the opening cleaning ring assembly moves, which completely avoids the risks of pulling and redundant winding caused by the inability to adjust the length of the hose in advance. The first guide tube and the second guide tube play a straightening and guiding role for the heating medium conveying hose and the sewage conveying hose. The joint design of the winding roller, the first guide tube and the second guide tube avoids fatigue damage, flattening or cracking of the heating medium conveying hose and the sewage conveying hose due to improper bending, stretching or squeezing, which significantly improves the durability of key consumables.

[0032] (4) The present invention adopts a combination of conical spray channel and conical spiral nozzle to achieve precise cleaning of one place inside the butterfly valve. The guide scraper and its upper and lower arc guide grooves can not only scrape off the melted tar when moving, but also effectively collect the scraped tar and guide it to the dirt collection point at the bottom of the valve body. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of the butterfly valve of the present invention;

[0035] Figure 2 A schematic diagram of the internal structure of the valve of the present invention;

[0036] Figure 3 This is a schematic diagram of the valve body structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the installation of the open cleaning ring assembly and cleaning mechanism of the present invention;

[0038] Figure 5 This is a schematic diagram of the cleaning mechanism structure of the present invention;

[0039] Figure 6 This is a schematic diagram of the internal structure of the transmission component mounting box of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the opening cleaning ring assembly of the present invention;

[0041] Figure 8 This is a schematic diagram of the main structure of the opening cleaning ring of the present invention;

[0042] Figure 9 This is a schematic diagram of the conical spiral nozzle structure of the present invention.

[0043] In the diagram: 1. Valve body; 2. Valve seat; 20. Valve shaft; 21. Butterfly plate; 22. Packing seal assembly; 3. Opening and closing drive assembly; 4. Cleaning mechanism; 40. Heating medium conveying hose; 41. Sewage conveying hose; 42. Opening cleaning ring assembly; 420. Reciprocating slider; 421. Opening cleaning ring body; 422. Tar suction pipe; 4220. Guide scraper; 4221. Upper arc-shaped guide groove; 4222. Lower arc-shaped guide groove; 423. Axial guide cavity; 424. Heating medium injection ring pipe; 4240. Injection ring plate; 4241. Conical injection channel; 43. Transmission assembly mounting box; 4 30. Heating medium conveying hose connection port one; 431. Sewage conveying hose connection port one; 432. Heating medium conveying hose connection port two; 433. Sewage conveying hose connection port two; 44. Drive motor; 440. Dial plate; 441. Pipe winding roller; 4410. Zone dividing plate; 442. Rotating shaft one; 443. Rotating shaft two; 444. Grooved wheel; 445. Actuating pin; 446. Radial actuating groove; 447. Bevel gear one; 448. Bevel gear two; 449. Displacement transmission gear; 45. Displacement transmission rack; 46. Guide tube one; 47. Guide tube two; 48. Conical spiral nozzle. Detailed Implementation

[0044] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0045] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] The present invention provides the following embodiments.

[0047] Example 1

[0048] This invention provides a butterfly valve with a cleaning structure and its monitoring and control system, such as... Figures 1-9As shown, the butterfly valve includes a valve body 1, valve internals and an opening and closing drive assembly 3. The opening and closing drive assembly 3 is installed on the valve body 1 and is used to drive the valve internals to move to realize the opening and closing of the butterfly valve. The valve body 1 is also provided with a cleaning mechanism 4.

[0049] The cleaning mechanism 4 includes a cleaning power source, a heating medium delivery hose 40, a sewage delivery hose 41, and an open cleaning ring assembly 42. The cleaning power source includes a heat energy input assembly and a negative pressure generating assembly. The input end of the heating medium delivery hose 40 is connected to the discharge end of the heat energy input assembly, and the output end of the sewage delivery hose 41 is connected to the suction end of the negative pressure generating assembly. Both the output end of the heating medium delivery hose 40 and the input end of the sewage delivery hose 41 are connected to the open cleaning ring assembly 42. The open cleaning ring assembly 42 is slidably connected to the inner wall of the valve body 1 along the axial direction of the valve body 1. Both tar suction ends of the open cleaning ring assembly 42 are located at the bottom of the inner wall of the valve body 1. The open cleaning ring assembly 42 is used to spray heating medium onto the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, and the surface of the valve seat 2, and to suck out the melted tar accumulated at the bottom of the inner wall of the valve body 1.

[0050] In this embodiment, the heat input component may include a medium source, an explosion-proof heating unit, a temperature control unit, and a pressure regulating unit, wherein the medium source is a steam pipeline network or a nitrogen supply system;

[0051] The medium source provides the initial fluid medium. The pressure regulating unit is located downstream of the medium source and is used to regulate and stabilize the pressure of the medium to the system's set working pressure. It includes a pressure reducing valve and a filter. The explosion-proof heating unit is connected to the outlet of the pressure regulating unit and is used to heat the medium to the target temperature. When the medium is nitrogen, the explosion-proof heating unit is an explosion-proof electric heater. The temperature control unit includes a temperature sensor located on the outlet pipe of the explosion-proof heating unit and an explosion-proof controller electrically connected to the temperature sensor and the explosion-proof heating unit. The explosion-proof controller is used to dynamically adjust the power output of the explosion-proof heating unit according to the temperature signal fed back by the temperature sensor, forming a closed-loop temperature control to ensure that the temperature of the output medium remains constant within the preset range. The output end of the outlet pipe of the explosion-proof heating unit is the discharge end of the heat input component.

[0052] The negative pressure generating component may be any one of a steam ejector, a nitrogen ejector, or an explosion-proof liquid ring vacuum pump, wherein the medium input end of the steam ejector, nitrogen ejector, or explosion-proof liquid ring vacuum pump is the suction end of the negative pressure generating component.

[0053] In this embodiment, the heating medium may include either steam or hot nitrogen.

[0054] In this embodiment, the inner layer of both the heating medium conveying hose 40 and the sewage conveying hose 41 is made of polytetrafluoroethylene to ensure the high temperature resistance, corrosion resistance and non-adhesion of the inner layer, the middle layer is made of stainless steel wire braiding to improve the pressure resistance of the hose, and the outer layer is made of oil-resistant and wear-resistant fluororubber or polyurethane sheath.

[0055] The working principle and beneficial effects of the above technical solution are as follows: During operation, the heat input component delivers the heating medium through the heating medium delivery hose 40 to the opening cleaning ring component 42, and then sprays it onto the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, or the valve seat 2. The tar residue solidified on the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, and the surface of the valve seat 2 melts into tar under the action of the high-temperature heating medium, and accumulates at the bottom of the inner wall of the valve body 1 under the action of gravity. Then, the negative pressure generating component generates negative pressure, causing the tar accumulated at the bottom of the inner wall of the valve body 1 to dissolve. The tar is sucked out after passing through the opening of the open cleaning ring assembly 42 (i.e., the tar suction end) and the sewage delivery hose 41 in sequence, thereby cleaning the tar residue on the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, or the valve seat 2. The design of the open cleaning ring assembly 42 sliding along the axial direction of the valve body 1 can maximize the cleaning area of ​​the open cleaning ring assembly 42. At the same time, the position of the open cleaning ring assembly 42 can be adjusted axially to effectively avoid mechanical interference between the open cleaning ring assembly 42 and the valve internals during the cleaning process.

[0056] This invention achieves precise heat delivery and efficient utilization by directly spraying the heating medium onto the inner wall of the valve body 1, the surface of the butterfly plate 21, and the valve seat 2, where tar accumulation is most severe. This overcomes the drawbacks of low thermal efficiency and poor performance of external heating. Simultaneously, the design of the opening cleaning ring assembly 42, which slides axially along the valve body 1, allows its cleaning range to cover the entire length of the valve cavity. It can also flexibly avoid the butterfly plate 21 through movement. Furthermore, the annular design of the opening cleaning ring assembly 42 comprehensively covers the circumference of the inner wall of the valve body 1, completely solving the cleaning blind spot problem caused by the avoidance of fixed nozzles. The integrated process of heating softening and negative pressure suction in this invention can be automatically completed without stopping the valve or disassembling it, avoiding the production interruption and sealing surface damage risks caused by traditional manual cleaning, and significantly improving maintenance efficiency and safety.

[0057] Example 2

[0058] Based on Embodiment 1, the valve internals include a valve shaft 20, which is fixedly connected to the output end of the opening and closing drive assembly 3. A butterfly plate 21 is fixedly connected to the valve shaft 20. A packing cavity is formed at the part where the valve shaft 20 passes through the valve body 1. The packing cavity is filled with packing. A packing sealing assembly 22 is provided above the packing. The packing sealing assembly 22 is used to apply axial pressure to the packing, causing it to expand radially and tightly fit the valve shaft 20 and the valve body 1.

[0059] It also includes a valve seat 2, which is fixedly connected inside the valve body 1. The valve seat 2 is used to seal with the end face of the butterfly plate 21 when the opening and closing drive assembly 3 drives the butterfly plate 21 to rotate to the closed position.

[0060] In this embodiment, the butterfly plate 21 is fixedly connected to the valve shaft 20. Specifically, a plurality of evenly arranged butterfly plate connecting plates are fixedly connected to the valve shaft 20, and the butterfly plate 21 is fixedly connected to the butterfly plate connecting plates. The butterfly plate connecting plates and the butterfly plate 21 are perpendicular to each other.

[0061] The working principle and beneficial effects of the above technical solution are as follows: During operation, the opening and closing drive assembly 3 drives the valve shaft 20 to rotate, and the valve shaft 20 drives the butterfly plate 21 to rotate. The rotation of the butterfly plate 21 realizes its cooperation and separation with the valve seat 2, thereby realizing the closing and cooperation of the butterfly valve. When the butterfly plate 21 rotates to the closed position, it is sealed with the end face of the butterfly plate 21. At this time, the plane of the butterfly plate 21 is parallel to the cross-section of the valve body 1. Except for the closed position, the other positions of the butterfly plate 21 are in the open state.

[0062] Example 3

[0063] Based on embodiment 1, the cleaning mechanism 4 also includes a transmission component mounting box 43, which is fixedly connected to the valve body 1. The transmission component mounting box 43 is provided with a cleaning transmission component, and the output end of the cleaning transmission component is fixedly connected to the open cleaning ring assembly 42. The cleaning transmission component is used to drive the open cleaning ring assembly 42 to slide back and forth along the axial direction of the valve body 1.

[0064] The working principle and beneficial effects of the above technical solution are as follows: After each time the opening cleaning ring assembly 42 sprays heating medium onto the inner wall of the valve body 1, the tar residue gradually melts. Then, the cleaning transmission assembly drives the opening cleaning ring assembly 42 to move a certain distance along the axial direction of the valve body 1. The area covered by this distance is less than or equal to the area of ​​the inner wall of the valve body 1 covered by the heating medium after it is sprayed. During the movement, the opening cleaning ring assembly 42 scrapes off the melted tar, thereby achieving a more effective cleaning effect. At the same time, it is more conducive to the tar accumulating at the bottom of the inner wall of the valve body 1, increasing cleaning efficiency and effectively avoiding mechanical interference. The movement of the opening cleaning ring assembly 42 can maximize the cleaning coverage area of ​​the cleaning mechanism 4. At the same time, the design of the cleaning transmission assembly is also beneficial to the adjustment of the distance between the opening cleaning ring assembly 42 and the surface of the butterfly plate 21 or the valve seat 2 of the valve internals when the opening cleaning ring assembly 42 sprays heating medium onto the surface of the butterfly plate 21 or the valve seat 2 of the valve internals.

[0065] This invention drives the opening cleaning ring assembly 42 to reciprocate axially through a cleaning transmission component, thereby expanding the effective range of a single cleaning unit from a point or line to the entire axial surface of the inner wall of the valve body 1. This solves the fundamental defect of the fixed cleaning range in the prior art. The controllable movement of the opening cleaning ring assembly 42 allows it to automatically adjust to the optimal cleaning position when the butterfly valve is open, closed, or in any intermediate state. This not only thoroughly cleans both sides of the butterfly plate 21 and the valve seat 2, but also allows it to retract completely to avoid interference, thus achieving intelligent coordination between cleaning and valve operation.

[0066] Example 4

[0067] Based on embodiment 3, the cleaning transmission assembly includes a transmission motor 44, which is fixedly connected to the transmission assembly mounting box 43. A dial 440 is fixedly connected to the output end of the transmission motor 44. A first rotating shaft 442 and a second rotating shaft 443 are rotatably connected inside the transmission assembly mounting box 43. A grooved wheel 444 and a first bevel gear 447 are fixedly connected to the first rotating shaft 442. A toggle pin 445 is fixedly connected to the dial 440. A plurality of radial toggle grooves 446 are provided on the grooved wheel 444. The toggle pin 445 is used to intermittently slide with the plurality of radial toggle grooves 446. A second bevel gear 448 and a displacement transmission gear 449 are fixedly connected to the second rotating shaft 443. The second bevel gear 448 meshes with the first bevel gear 447. A displacement transmission rack 45 is slidably connected to the side wall of the axial guide slide cavity 423 of the valve body 1. The displacement transmission gear 449 meshes with the displacement transmission rack 45. An open cleaning ring assembly 42 is fixedly connected to the displacement transmission rack 45.

[0068] The working principle and beneficial effects of the above technical solution are as follows: During operation, the drive motor 44 starts and drives the dial 440 to rotate. During the rotation of the dial 440, the actuating pin 445 enters the radial actuating groove 446 of the grooved wheel 444. At this time, the grooved wheel 444 will rotate under the action of the actuating pin 445. When the actuating pin 445 exits from the current radial actuating groove 446, the grooved wheel 444 stops rotating. Taking one grooved wheel 444 corresponding to four radial actuating grooves 446 as an example, the grooved wheel 444 rotates 90 degrees for every revolution of the dial 440. The first 90 degrees of clockwise (counterclockwise) rotation of the dial 440 corresponds to 90 degrees of counterclockwise (counterclockwise) rotation of the grooved wheel 444. After the grooved wheel 444 has rotated 90 degrees counterclockwise (clockwise), the actuating pin 445 exits from the current radial actuating groove 446. The rear dial 440 continues to rotate for another 270 degrees, and then enters the next cycle. The toggle pin 445 slides into the next radial toggle groove 446 to continue the cycle. The time period when the groove wheel 444 stops rotating (that is, the time period when the dial 440 continues to rotate for another 270 degrees) corresponds to the time period when the opening cleaning ring assembly 42 sprays the heating medium onto the inner wall of the valve body 1. The time period when the groove wheel 444 rotates corresponds to the time period when the opening cleaning ring assembly 42 moves forward to scrape off the melted tar. The intermittent cooperation between the dial 440 and the groove wheel 444 cleverly leaves sufficient reaction time for the heating medium to melt the tar, so that the tar melting time is equivalent to 3 times the tar scraping time. Compared with direct scraping after spraying, it makes full use of the heat of the heating medium and can better ensure the tar cleaning effect.

[0069] Specifically, the melting action is as follows: the opening cleaning ring assembly 42 sprays a heating medium onto the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, or the valve seat 2, and the tar residue on the inner wall of the valve body 1, the surface of the butterfly plate 21 of the valve internals, or the surface of the valve seat 2 melts under the action of temperature.

[0070] The scraping action is as follows: the rotation of the grooved wheel 444 drives the first rotating shaft 442 to rotate, the first rotating shaft 442 drives the first bevel gear 447 to rotate, the first bevel gear 447 drives the second bevel gear 448 to rotate, the second bevel gear 448 drives the second rotating shaft 443 to rotate, the second rotating shaft 443 drives the displacement transmission gear 449 to rotate, and the second rotating shaft 443 drives the displacement transmission rack 45 to slide along the side wall of the axial guide slide cavity 423, thereby driving the opening cleaning ring assembly 42 forward to achieve the scraping of the melted tar on the inner wall of the valve body 1;

[0071] This invention utilizes the intermittent motion characteristics of the grooved wheel 444 mechanism to mechanically reserve sufficient dwell heating time for tar melting, ensuring that the tar is fully softened before scraping. This method is more efficient and thorough than continuous scanning cleaning. Sufficient melting time means that a relatively lower heating medium flow rate or temperature can be used to achieve the cleaning effect, saving energy. At the same time, mechanical intermittent transmission is more reliable than complex electronic timing control and is more adaptable to the harsh environment of industrial sites. Through the combination of dial 440, grooved wheel 444, bevel gear one 447, bevel gear two 448, displacement transmission gear 449 and displacement transmission rack 45, the continuous rotation of the transmission motor 44 is converted into stable and precise intermittent linear feed of the open cleaning ring assembly 42. The stroke of each scraping is fixed and controllable, ensuring the stability and repeatability of the cleaning process.

[0072] Example 5

[0073] Based on embodiment 4, the output end of the drive motor 44 is also fixedly connected to a winding roller 441. The area dividing plate 4410 in the middle of the winding roller 441 divides the winding roller 441 into a heating medium conveying hose winding area and a sewage conveying hose winding area.

[0074] The side wall of the transmission component mounting box 43 is provided with a heating medium conveying hose connection port 430 and a sewage conveying hose connection port 431. The input end of the heating medium conveying hose 40 is connected to the heating medium conveying hose connection port 430 and then wound around the heating medium conveying hose winding area. After passing through the guide tube 46 on the valve body 1, it is connected to the heating medium conveying hose connection port 432 on the open cleaning ring assembly 42. The output end of the sewage conveying hose 41 is connected to the sewage conveying hose connection port 431 and then wound around the sewage conveying hose winding area. After passing through the guide tube 47 on the valve body 1, it is connected to the sewage conveying hose connection port 433 on the open cleaning ring assembly 42.

[0075] The working principle and beneficial effects of the above technical solution are as follows: When the heating medium is sprayed out, the heating medium enters the heating medium conveying hose 40 through the heating medium conveying hose connection port 1 430, and then enters the open cleaning ring assembly 42 through the output end of the heating medium conveying hose 40 and the heating medium conveying hose connection port 2 432. When the tar is sucked out, the tar is sucked into the sewage conveying hose connection port 2 433 through the open cleaning ring assembly 42, and then discharged through the sewage conveying hose 41 and then through the sewage conveying hose connection port 1 431.

[0076] like Figure 6Assuming the clockwise direction of the dial 440 corresponds to the forward direction of the open cleaning ring assembly 42, during the 270-degree time period when the dial 440 rotates but the grooved wheel 444 does not, the winding roller 441 continues to rotate with the dial 440. At this time, the heating medium delivery hose 40 and the sewage delivery hose 41 located at the right end of the winding roller 441 are in a gradually extending state, while those located at the left end are in a gradually retracting state. This means that the heating medium delivery hose 40 and the sewage delivery hose 41 located at the right end of the winding roller 441 have more free length as the winding roller 441 rotates, thus reserving more hose length for the next cycle of tar scraping when the open cleaning ring assembly 42 advances. This prevents the hoses from being pulled due to insufficient length of the heating medium delivery hose 40 and the sewage delivery hose 41 at the right end of the winding roller 441 during the movement of the open cleaning ring assembly 42. Simultaneously, when the winding roller 441 rotates counterclockwise... When the needle rotates, the heating medium conveying hose 40 and the sewage conveying hose 41 located at the right end of the winding drum 441 are in a gradually retracting state, while the heating medium conveying hose 40 and the sewage conveying hose 41 located at the left end of the winding drum 441 are in a gradually releasing state. That is, the excessive heating medium conveying hose 40 and the sewage conveying hose 41 at the right end of the winding drum 441 are retracted in advance, so as to clear the excess hose obstruction for the next cycle of the opening cleaning ring assembly 42 to retreat, ensuring that the hose can be successfully recycled in the future, and avoiding hose knotting and blockage of the hose recycling channel due to redundant hose accumulation. The design of the area dividing plate 4410 can avoid interference between the heating medium conveying hose 40 and the sewage conveying hose 41 during the winding process. The first guide tube 46 and the second guide tube 47 play a role in straightening the heating medium conveying hose 40 and the sewage conveying hose 41, effectively avoiding the knotting problem of the heating medium conveying hose 40 and the sewage conveying hose 41 during the releasing and retracting process.

[0077] This invention, through the linkage design of the winding roller 441 and the open cleaning ring assembly 42, realizes the automatic pre-tensioning and retraction of the heating medium conveying hose 40 and the sewage conveying hose 41 as the open cleaning ring assembly 42 moves, completely avoiding the risks of pulling and redundant entanglement caused by the inability to adjust the length of the hose in advance. The first guide tube 46 and the second guide tube 47 play a straightening and guiding role for the heating medium conveying hose 40 and the sewage conveying hose 41. The joint design of the winding roller 441, the first guide tube 46 and the second guide tube 47 avoids fatigue damage, flattening or cracking of the heating medium conveying hose 40 and the sewage conveying hose 41 caused by improper bending, stretching or squeezing, and significantly improves the durability of key consumables.

[0078] Example 6

[0079] Based on embodiment 4, the open cleaning ring assembly 42 includes a reciprocating slider 420 and an open cleaning ring body 421. The open cleaning ring body 421 is connected through and fixedly connected to the reciprocating slider 420. The reciprocating slider 420 is fixedly connected to the displacement transmission rack 45. The inner wall of the valve body 1 is provided with an axial guide slide cavity 423. The reciprocating slider 420 is slidably connected to the side wall of the axial guide slide cavity 423. The open cleaning ring body 421 is provided with a heating medium injection ring pipe 424 and a tar suction pipe 422. The heating medium injection ring pipe 424 and the tar suction pipe 422 are respectively connected to the heating medium delivery hose 40 and the sewage delivery hose 41 through the heating medium delivery hose connection port 2 432 and the sewage delivery hose connection port 2 433 on the reciprocating slider 420.

[0080] The working principle and beneficial effects of the above technical solution are as follows: During operation, the displacement transmission rack 45 slides along the side wall of the axial guide slide cavity 423, driving the reciprocating slider 420 to slide along the side wall of the axial guide slide cavity 423. The heating medium can enter the heating medium injection ring pipe 424 in sequence through the heating medium delivery hose 40 and the second heating medium delivery hose connection port 432. The melted tar can be sucked out in sequence through the tar suction pipe 422, the second sewage delivery hose connection port 433 and the sewage delivery hose 41. Since the heat of the adjacent heating medium injection ring pipe 424 can be directly conducted to the tar suction pipe 422, the blockage of the tar suction pipe 422 due to temperature drop can be effectively avoided.

[0081] This invention integrates the heating medium injection ring pipe 424 and the tar suction pipe 422 into the same open cleaning ring body 421, resulting in a compact structure. It eliminates the need for two separate actuators within a narrow valve cavity, reducing design complexity and failure rate. By arranging the heating medium injection ring pipe 424 and the tar suction pipe 422 adjacent to each other, the residual heat of the heating medium is used to insulate the tar suction pipe 422, effectively preventing the sucked-in liquid tar from re-solidifying and clogging the tar suction pipe 422 due to temperature drop. The cooperation between the reciprocating slider 420 and the axial guide cavity 423 provides a high-rigidity linear motion guide for the open cleaning ring assembly 42, while also facilitating the installation of seals to ensure the butterfly valve's sealing performance.

[0082] Example 7

[0083] Based on Example 6, the corresponding part of the heating medium injection ring pipe 424 on the open cleaning ring body 421 is provided with a number of conical spiral nozzles 48 and two symmetrically arranged injection ring plates 4240. A number of uniformly arranged conical injection channels 4241 are opened in the injection ring plates 4240. The conical injection channels 4241 and the conical spiral nozzles 48 are all connected to the heating medium injection ring pipe 424. A one-way control valve is provided in both the conical injection channels 4241 and the conical spiral nozzles 48.

[0084] The tar suction pipe 422 on the main body 421 of the open cleaning ring is provided with two symmetrically arranged guide scrapers 4220. The guide scrapers 4220 are provided with an upper arc-shaped guide groove 4221 and a lower arc-shaped guide groove 4222.

[0085] The working principle and beneficial effects of the above technical solution are as follows: When melting tar on the inner wall of valve body 1: the heating medium gradually fills the heating medium injection ring pipe 424, and then sprays the heating medium to the area to be melted on the inner wall of valve body 1 through the conical injection channel 4241 arranged around the heating medium injection ring pipe 424.

[0086] When melting tar on the butterfly plate 21 of the valve internals: the heating medium gradually fills the heating medium injection ring pipe 424, and then sprays the heating medium onto the surface of the butterfly plate 21 through the conical spiral nozzle 48 arranged around the heating medium injection ring pipe 424.

[0087] When melting tar near the valve seat 2 of the valve internals: the butterfly plate 21 is adjusted to the fully open state, and then the heating medium is gradually filled into the heating medium injection ring pipe 424. Then, the heating medium is sprayed to the vicinity of the valve seat 2 through the conical spiral nozzle 48 arranged around the heating medium injection ring pipe 424. The conical spiral nozzle 48 can generate a rotating jet, which enhances the impact and coverage of the complex curved surface of the butterfly plate 21 and the groove of the valve seat 2.

[0088] The one-way control valves in the conical injection channel 4241 and the conical spiral nozzle 48 facilitate the regulation of the injection flow rate and effectively prevent external impurities from entering the heating medium injection ring pipe 424.

[0089] During the tar removal process: As the main body 421 of the opening cleaning ring moves along the axial direction of the valve body 1, the guide scrapers 4220 on both sides scrape off the tar. The scraped tar will accumulate in the upper arc-shaped guide groove 4221 and the lower arc-shaped guide groove 4222. Under the combined action of gravity and the tar that subsequently accumulates in the upper arc-shaped guide groove 4221 and the lower arc-shaped guide groove 4222, it flows along the upper arc-shaped guide groove 4221 and the lower arc-shaped guide groove 4222 into the bottom of the inner wall of the valve body 1 and accumulates.

[0090] The present invention adopts a combination of conical spray channel 4241 and conical spiral nozzle 48 to achieve precise cleaning of the inside of the butterfly valve. The guide scraper 4220 and its upper arc guide groove 4221 and lower arc guide groove 4222 can not only scrape off the melted tar when moving, but also effectively collect the scraped tar and guide it to the dirt collection point at the bottom of the inner wall of the valve body 1.

[0091] Example 8

[0092] This invention provides a monitoring and control system for controlling a butterfly valve with a cleaning structure as described in any one of Examples 1-7, comprising:

[0093] The tar region recognition module is used to acquire three-dimensional point cloud data of the inner surface of valve body 1 and to identify the tar accumulation region inside valve body 1 through a trained tar region recognition model. The three-dimensional point cloud data of the inner surface of valve body 1 includes the three-dimensional point cloud data of the inner wall of valve body 1, the surface of butterfly plate 21 and the surface of valve seat 2.

[0094] The cleaning difficulty quantification module is used to divide each tar accumulation area into several grid unit areas, obtain the feature parameters of each grid unit area, form the feature vector corresponding to each grid unit area based on the feature parameters of each grid unit area, and construct the cleaning difficulty quantification matrix corresponding to each tar accumulation area based on the feature vector corresponding to each grid unit area. The feature parameters include the tar residue accumulation area, average tar residue accumulation thickness, maximum tar residue accumulation thickness, tar residue surface roughness, and average temperature of each grid unit area.

[0095] The cleaning strategy determination module compares the cleaning difficulty quantification matrix corresponding to each tar accumulation area with the benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library, selects the benchmark cleaning difficulty quantification matrix with the highest matching degree with the cleaning difficulty quantification matrix corresponding to the current tar accumulation area, and determines the cleaning strategy for the current tar accumulation area based on the cleaning strategy corresponding to the benchmark cleaning difficulty matrix with the highest matching degree.

[0096] In this embodiment, a three-dimensional point cloud data of the inner surface of the valve body 1 is acquired by a three-dimensional laser scanner mounted on the opening cleaning ring assembly 42.

[0097] In this embodiment, the trained tar region recognition model is obtained by training a neural network model with a large number of three-dimensional point cloud data samples of the valve inner surface that have been accurately annotated by professionals as input and the tar accumulation region recognition results as output.

[0098] In this embodiment, the grid cell region of the tar accumulation area is divided by projecting the point cloud of each identified tar accumulation area onto a two-dimensional plane (usually a plane parallel to the local tangent plane of the valve body). Then, a regular rectangular coordinate system is established on this two-dimensional projection plane, and a series of equally spaced straight lines parallel to the X-axis or Y-axis are used to divide the area into a row or column of uniformly sized rectangular grids. Each two-dimensional grid is mapped back to three-dimensional space, which corresponds to a grid cell region.

[0099] In this embodiment, the tar residue accumulation area of ​​each grid cell region is the area enclosed by the polygons projected onto the two-dimensional projection plane of all points in the corresponding grid cell region.

[0100] The average thickness of tar residue accumulation in each grid cell region is the average of the vertical distances from all tar points in the corresponding grid cell region to its two-dimensional projection plane;

[0101] The maximum thickness of tar residue accumulation in each grid cell region is the maximum vertical distance from all tar points in the corresponding grid cell region to the two-dimensional projection plane;

[0102] The surface roughness of the tar residue in each grid cell region is the standard deviation of the direction angle of the local surface normal vector of all tar points in the corresponding grid cell region;

[0103] The average temperature of each grid cell region was measured by an infrared thermal imager integrated on the open cleaning ring assembly 42.

[0104] In this embodiment, a feature vector corresponding to each grid cell region is formed based on the feature parameters of each grid cell region. Specifically, the feature parameters of each grid cell region are combined in a fixed order to form a feature vector (row vector or column vector) corresponding to each grid cell region.

[0105] In this embodiment, a cleaning difficulty quantification matrix corresponding to each tar accumulation area is constructed based on the feature vector corresponding to each grid unit area. Specifically, the feature vector corresponding to each grid unit area is arranged and combined horizontally or vertically in a fixed order to form a cleaning difficulty quantification matrix corresponding to each tar accumulation area.

[0106] In this embodiment, the corresponding component cleaning difficulty strategy screening library includes a valve body cleaning difficulty strategy screening library, a butterfly plate cleaning difficulty strategy screening library, and a valve seat cleaning difficulty strategy screening library.

[0107] In this embodiment, the baseline cleaning difficulty quantification matrix of the corresponding component cleaning difficulty strategy screening library is constructed in advance before system deployment based on engineering experience, laboratory simulation tests or finite element analysis. A batch of theoretical cleaning difficulty quantification matrix models corresponding to typical tar working conditions (such as thin-layer uniform accumulation, thick-layer block accumulation, high-temperature viscous state, low-temperature hardening state, etc.) for valve bodies, butterfly plates and valve seats are pre-constructed, and verified effective cleaning strategies are matched for them as the initial baseline library content. The number of rows and columns of the baseline cleaning difficulty quantification matrix corresponds one-to-one with the number of rows and columns of the cleaning difficulty quantification matrix.

[0108] In this embodiment, the cleaning strategy for tar accumulation areas includes the temperature, injection pressure and flow rate of the heating medium supplied by the heat input component during the cleaning of each tar accumulation area, the total injection dwell time during the cleaning of each tar accumulation area, and the tar absorption supply pressure of the negative pressure generating component during the cleaning of each tar accumulation area.

[0109] The working principle and beneficial effects of the above technical solution are as follows: By incorporating three-dimensional scanning and artificial intelligence recognition technology, this invention can accurately identify tar accumulation areas. By quantifying the complex tar state into a standardized cleaning difficulty matrix and introducing a strategy screening library built based on historical successful cases for intelligent matching, personalized matching of cleaning strategies is achieved. This solves the problem of traditional methods having fixed parameters and being unable to cope with tar of different viscosities, thicknesses, and adhesion strengths. It achieves precise, efficient, and automated cleaning of tar accumulation, significantly improving maintenance efficiency, cleaning effect, and system reliability.

[0110] Example 9

[0111] Based on Example 8, the formula for calculating the matching degree between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library is as follows:

[0112] ;in, This represents the degree of matching between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the value in the i-th row and j-th column of the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the value in the i-th row and j-th column of the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the total number of rows in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the total number of columns in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area.

[0113] The working principle and beneficial effects of the above technical solution are as follows: By introducing a matrix matching degree calculation formula, this invention achieves accurate matching between the cleaning difficulty quantification matrix corresponding to each tar accumulation area and the benchmark cleaning difficulty quantification matrix of the corresponding component cleaning difficulty strategy screening library. This allows for precise determination of the matching cleaning strategy. Compared with simple Euclidean distance or correlation coefficient comparison, this formula is not sensitive to local outliers (such as drastic differences in a single grid) and better reflects the similarity of the two matrices in the overall distribution pattern. This effectively avoids mismatch of strategies caused by noise in individual data points or slight scanning errors, and significantly improves the accuracy and reliability of cleaning strategy selection.

[0114] Example 10

[0115] Based on Example 8, it also includes:

[0116] The cleaning effect feedback and correction module is used to reacquire image data of each tar accumulation area after each cleaning action. Based on the image data of each tar accumulation area and the trained cleaning evaluation model, the cleaning effect of each tar accumulation area is evaluated, and the cleaning effect evaluation value corresponding to each tar accumulation area is obtained. If the cleaning effect evaluation value exceeds the set threshold, the cleaning strategy is automatically optimized.

[0117] In this embodiment, image data of each tar accumulation area is acquired by a miniature imaging device integrated on the opening cleaning ring assembly 42.

[0118] In this embodiment, the trained cleaning evaluation model is a model obtained by training a neural network model with a large number of images of the valve body interior as input and the corresponding cleaning effect evaluation values ​​as output. The cleaning effect evaluation values ​​are values ​​between 0 and 100, with higher values ​​indicating better cleaning effects.

[0119] In this embodiment, if the cleaning effect evaluation value exceeds the set threshold, the cleaning strategy is automatically optimized. That is, when the cleaning evaluation value is lower than the preset value, the cleaning strategy parameters are adaptively adjusted until the requirements are met.

[0120] The working principle and beneficial effects of the above technical solution are as follows: By adding a cleaning effect feedback correction module, the present invention realizes closed-loop control and adaptive optimization of the cleaning process. By acquiring multi-dimensional image data after cleaning, a deep learning model is used to quantitatively evaluate the cleaning effect. When the cleaning effect is not up to standard, the failure mode can be automatically identified and the cleaning strategy parameters can be optimized in a targeted manner to avoid energy waste and valve damage caused by repeated ineffective cleaning.

[0121] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A butterfly valve with a cleaning structure, characterized in that: It includes a valve body (1), valve internals and an opening and closing drive assembly (3). The opening and closing drive assembly (3) is installed on the valve body (1) and is used to drive the valve internals to move to realize the opening and closing of the butterfly valve. The valve body (1) is also provided with a cleaning mechanism (4). The cleaning mechanism (4) includes a cleaning power source, a heating medium delivery hose (40), a sewage delivery hose (41), and an open cleaning ring assembly (42). The cleaning power source includes a heat energy input assembly and a negative pressure generating assembly. The input end of the heating medium delivery hose (40) is connected to the discharge end of the heat energy input assembly. The output end of the sewage delivery hose (41) is connected to the suction end of the negative pressure generating assembly. The output end of the heating medium delivery hose (40) and the input end of the sewage delivery hose (41) are both connected to the open cleaning ring assembly (42). The open cleaning ring assembly (42) is slidably connected to the inner wall of the valve body (1) along the axial direction of the valve body (1). The two tar suction ends of the open cleaning ring assembly (42) are both located at the bottom of the inner wall of the valve body (1). The open cleaning ring assembly (42) is used to spray the heating medium onto the inner wall of the valve body (1), the surface of the butterfly plate (21) of the valve internals, and the surface of the valve seat (2), and to suck out the tar that has melted and accumulated at the bottom of the inner wall of the valve body (1). The cleaning mechanism (4) also includes a transmission component mounting box (43), which is fixedly connected to the valve body (1), and a cleaning transmission component is provided inside the transmission component mounting box (43); The cleaning transmission assembly includes a transmission motor (44), which is fixedly connected to the transmission assembly mounting box (43). A dial (440) is fixedly connected to the output end of the transmission motor (44). A rotating shaft one (442) and a rotating shaft two (443) are rotatably connected inside the transmission assembly mounting box (43). A grooved wheel (444) and a bevel gear one (447) are fixedly connected to the rotating shaft one (442). A toggle pin (445) is fixedly connected to the dial (440). Several radial toggle grooves (446) are opened on the grooved wheel (444). A toggle pin (445) is used to intermittently slide with several radial toggle grooves (446). A bevel gear (448) and a displacement transmission gear (449) are fixedly connected to the second shaft (443). The second bevel gear (448) meshes with the first bevel gear (447). A displacement transmission rack (45) is slidably connected to the side wall of the axial guide slide cavity (423) of the valve body (1). The displacement transmission gear (449) meshes with the displacement transmission rack (45). An opening cleaning ring assembly (42) is fixedly connected to the displacement transmission rack (45).

2. The butterfly valve with a cleaning structure according to claim 1, characterized in that: The valve internals include a valve shaft (20), which is fixedly connected to the output end of the opening and closing drive assembly (3). A butterfly plate (21) is fixedly connected to the valve shaft (20). A packing cavity is formed at the part where the valve shaft (20) passes through the valve body (1). The packing cavity is filled with packing. A packing seal assembly (22) is provided above the packing. The packing seal assembly (22) is used to apply axial pressure to the packing, causing it to expand radially and fit tightly against the valve shaft (20) and the valve body (1). It also includes a valve seat (2), which is fixedly connected inside the valve body (1). The valve seat (2) is used to seal with the end face of the butterfly plate (21) when the opening and closing drive assembly (3) drives the butterfly plate (21) to rotate to the closed position.

3. A butterfly valve with a cleaning structure according to claim 1, characterized in that: The output end of the drive motor (44) is also fixedly connected to a winding roller (441). The area dividing plate (4410) in the middle of the winding roller (441) divides the winding roller (441) into a heating medium conveying hose winding area and a sewage conveying hose winding area. The side wall of the transmission component mounting box (43) is provided with a heating medium conveying hose connection port one (430) and a sewage conveying hose connection port one (431). The input end of the heating medium conveying hose (40) is connected to the heating medium conveying hose connection port one (430) and then wound around the heating medium conveying hose winding area. After passing through the first guide tube (46) on the valve body (1), it is connected to the second heating medium conveying hose connection port two (432) on the open cleaning ring assembly (42). The output end of the sewage conveying hose (41) is connected to the first sewage conveying hose connection port one (431) and then wound around the sewage conveying hose winding area. After passing through the second guide tube (47) on the valve body (1), it is connected to the second sewage conveying hose connection port two (433) on the open cleaning ring assembly (42).

4. A butterfly valve with a cleaning structure according to claim 1, characterized in that: The open cleaning ring assembly (42) includes a reciprocating slider (420) and an open cleaning ring body (421). The open cleaning ring body (421) is connected through and fixedly connected to the reciprocating slider (420). The reciprocating slider (420) is fixedly connected to the displacement transmission rack (45). The inner wall of the valve body (1) is provided with an axial guide slide cavity (423). The reciprocating slider (420) is slidably connected to the side wall of the axial guide slide cavity (423). The open cleaning ring body (421) is provided with a heating medium injection ring pipe (424) and a tar suction pipe (422). The heating medium injection ring pipe (424) and the tar suction pipe (422) are respectively connected to the heating medium delivery hose (40) and the sewage delivery hose (41) through the heating medium delivery hose connection port two (432) and the sewage delivery hose connection port two (433) on the reciprocating slider (420).

5. A butterfly valve with a cleaning structure according to claim 4, characterized in that: The opening cleaning ring body (421) has several conical spiral nozzles (48) and two symmetrically arranged spray ring plates (4240) in the corresponding part of the heating medium spray ring pipe (424). Several uniformly arranged conical spray channels (4241) are opened in the spray ring plate (4240). The conical spray channels (4241) and the conical spiral nozzles (48) are connected to the heating medium spray ring pipe (424). One-way control valves are provided in the conical spray channels (4241) and the conical spiral nozzles (48). The tar suction pipe (422) on the main body (421) of the open cleaning ring is provided with two symmetrically arranged guide scrapers (4220). The guide scrapers (4220) are provided with an upper arc-shaped guide groove (4221) and a lower arc-shaped guide groove (4222).

6. A monitoring and control system for controlling a butterfly valve with a cleaning structure as described in any one of claims 1-5, characterized in that: include: The tar region identification module is used to acquire three-dimensional point cloud data of the inner surface of the valve body (1) and identify the tar accumulation area inside the valve body (1) through the trained tar region identification model. The three-dimensional point cloud data of the inner surface of the valve body (1) includes the three-dimensional point cloud data of the inner wall of the valve body (1), the surface of the butterfly plate (21) and the surface of the valve seat (2). The cleaning difficulty quantification module is used to divide each tar accumulation area into several grid unit areas, obtain the feature parameters of each grid unit area, form the feature vector corresponding to each grid unit area based on the feature parameters of each grid unit area, and construct the cleaning difficulty quantification matrix corresponding to each tar accumulation area based on the feature vector corresponding to each grid unit area. The feature parameters include the tar residue accumulation area, average tar residue accumulation thickness, maximum tar residue accumulation thickness, tar residue surface roughness, and average temperature of each grid unit area. The cleaning strategy determination module compares the cleaning difficulty quantification matrix corresponding to each tar accumulation area with the benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library, selects the benchmark cleaning difficulty quantification matrix with the highest matching degree with the cleaning difficulty quantification matrix corresponding to the current tar accumulation area, and determines the cleaning strategy for the current tar accumulation area based on the cleaning strategy corresponding to the benchmark cleaning difficulty matrix with the highest matching degree.

7. A monitoring and control system according to claim 6, characterized in that: The formula for calculating the matching degree between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library is as follows: ;in, This represents the degree of matching between the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area and the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the value in the i-th row and j-th column of the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the value in the i-th row and j-th column of the b-th benchmark cleaning difficulty quantification matrix in the corresponding component cleaning difficulty strategy screening library. Let be the total number of rows in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area. This represents the total number of columns in the cleaning difficulty quantification matrix corresponding to the a-th tar accumulation area.

8. A monitoring and control system according to claim 6, characterized in that: Also includes: The cleaning effect feedback and correction module is used to reacquire image data of each tar accumulation area after each cleaning action. Based on the image data of each tar accumulation area and the trained cleaning evaluation model, the cleaning effect of each tar accumulation area is evaluated, and the cleaning effect evaluation value corresponding to each tar accumulation area is obtained. If the cleaning effect evaluation value exceeds the set threshold, the cleaning strategy is automatically optimized.

Images