CN117189885A - Butterfly valve with protection device - Google Patents
Butterfly valve with protection device Download PDFInfo
- Publication number
- CN117189885A CN117189885A CN202311460763.XA CN202311460763A CN117189885A CN 117189885 A CN117189885 A CN 117189885A CN 202311460763 A CN202311460763 A CN 202311460763A CN 117189885 A CN117189885 A CN 117189885A
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- sealing ring
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- 241001330002 Bambuseae Species 0.000 claims description 14
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- 125000003003 spiro group Chemical group 0.000 description 2
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- 229910001338 liquidmetal Inorganic materials 0.000 description 1
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- 238000005461 lubrication Methods 0.000 description 1
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- Lift Valve (AREA)
Abstract
The invention discloses a butterfly valve with a protection device, which comprises a valve body, wherein a butterfly plate is arranged in the valve body, a baffle ring is arranged at the outer edge of the butterfly plate, a sealing ring is arranged in the baffle ring, a convex ring is arranged on the inner wall of the valve body, the convex ring is tightly pressed by the sealing ring, a first cavity is arranged in the butterfly plate and is communicated with the sealing ring through discharge holes at two sides of the butterfly plate, a valve rod is arranged at the top of the butterfly plate, and a second cavity in the valve rod is communicated with the first cavity in the butterfly valve. And through the operation of the drive mechanism that expands that contracts, can realize that the sealing ring expands out and contracts for when the sealing ring contracts, take off the knot thing of adhering to on the sealing ring and break the separation because of the quick flat of sealing ring, and because the shrink of sealing ring, the butterfly plate rotatory in-process sealing ring can not cause the hard friction to the knot thing, avoids the sealing ring to break, thereby protection sealing ring and valve rod drive mechanism, thereby realize the operation protection to butterfly valve itself.
Description
Technical Field
The invention belongs to the technical field of butterfly valves, and particularly relates to a butterfly valve with a protection device.
Background
The butterfly valve is one of regulating valves, and drives the butterfly plate to rotate through the valve rod, so that the butterfly valve is opened and closed.
Because of the large amount of flow through the interior, it is often used to control the flow of various types of fluids, such as various corrosive media, slurries, viscous oils, liquid metals, and radioactive media.
When the pipeline conveying system is huge and thick, and the diameter flow is required to be controlled by controlling the rotation angle of the butterfly valve, the valve rod is usually required to be driven to rotate by a motor, so that the butterfly plate is driven to rotate.
It is known that the rotation of the butterfly plate itself has a wiping property inside the valve body, which requires the sealing ring on its outer edge to achieve its tightness against the inner wall of the valve body. Therefore, in the normal temperature fluid control process containing the granular media, a rubber sealing ring is usually adopted to be arranged at the outer edge of the butterfly plate, and in the overturning process of the butterfly plate, the sealing ring can wipe off the granular media attached to the periphery of the sealing ring as the sealing ring has wiping performance on the inner wall of the valve body; when the butterfly plate closes the inner wall of the valve body, the sealing ring can block fluid from passing through the butterfly plate and the inner wall of the valve body.
However, when the fluid itself has a certain caking property, that is, when a butterfly valve in a certain position in the whole pipeline conveying system is in a closed state for a long time, the particle medium is accumulated on the inner wall of the valve body beside the sealing ring around the butterfly plate, and as the fluid has a certain caking property, the particle medium is mutually nodular to form hard annular impurities, and is tightly scraped on the inner wall of the valve body and even the sealing ring. When the butterfly plate rotates, the seal is not easy to directly wipe off, but passes through the hard annular impurity in a pressing and wiping mode, in the process, the seal ring is directly worn, and the seal ring is directly damaged when severe, so that the butterfly plate is directly lack of tightness.
Therefore, it is necessary to provide a butterfly valve with a protector for a fluid having a knot, which is less likely to cause breakage of a seal ring when a butterfly plate rotates after a knot forms a hard annular impurity.
Disclosure of Invention
The invention aims to provide a butterfly valve with a protection device, which solves the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the butterfly valve with the protection device comprises a valve body, wherein a butterfly plate is arranged in the valve body, a baffle ring is arranged at the outer edge of the butterfly plate, a sealing ring is arranged in the baffle ring, a convex ring is arranged on the inner wall of the valve body, the sealing ring compresses the convex ring, a first cavity is arranged in the butterfly plate and is communicated with the sealing ring through discharge holes on two sides of the butterfly plate, and a valve rod is arranged at the top of the butterfly plate and is communicated with the first cavity in the butterfly plate;
the upper part of the valve body is provided with a sealing valve cover, the valve rod penetrates out of the valve body and penetrates through the sealing valve cover, and the sealing valve cover is used for sealing the valve body by matching with the valve rod;
the valve body is characterized in that support columns are connected to two sides of the valve body, a support disc is arranged at the top of the support columns, the valve rod penetrates into the support disc, a row of holes are formed in the position, located on the support disc, of the valve rod, a valve rod driving mechanism is arranged at the top of the support disc and used for driving the valve rod to rotate and stop the valve rod, a shrinkage and expansion driving mechanism is arranged on one side of the support disc and used for controlling the sealing ring to expand and shrink outwards.
In order to ensure that the sealing ring can shrink, the elastic inner support is provided for the sealing ring so as to ensure the lateral deformation resistance of the sealing ring after the sealing ring is filled, preferably, net support frames are uniformly arranged on the outer edge of the butterfly plate in the circumferential direction, and the net support frames are supported on the inner wall of the sealing ring.
In order to guarantee the better leakproofness of valve rod and valve body cooperation in-process, preferably, the sealing valve gap is including setting up the annular at the valve body top, be provided with the underwriting ring in the annular, the fixed takeover that is provided with on the valve body, the top of takeover and valve body is equipped with annular and annular in be provided with soft ring, be provided with the packing ring in annular and the takeover, the top of takeover is provided with gland and presses in the packing ring, the center of gland is provided with the sealing ring and the valve rod runs through the sealing ring.
In order to realize that the valve rod can be on the basis of rotating on the carrier plate, can possess better cooperation leakproofness, preferably, the central part upper and lower position of carrier plate is equipped with the fluting, all be provided with sealed bearing in the fluting, still be provided with the sliding ring in the fluting, the valve rod runs through sealed bearing's inner circle and sliding ring.
In order to realize providing power to the valve rod rotation and conveniently monitoring to torsion, preferably, valve rod actuating mechanism is including the fixed closing cap that sets up on the holding pan, the valve rod penetrates closing cap and the valve rod penetrates the one end of closing cap and be connected with the axle one, be provided with first gear on the axle one, top one side of closing cap is provided with into the pipe, the top spiro union of arranging into the pipe has the oil seal to cover, one side rotates in the closing cap and is provided with the axle two, fixedly on the axle two be provided with second gear and the first gear of second gear engagement, the top opposite side of closing cap is provided with a section of thick bamboo that props, the top of a section of thick bamboo is provided with the motor, the power controlled end of motor passes through cable connection peripheral hardware driver one, one side is provided with torsion sensor in the section of thick bamboo, the rotor shaft of motor penetrates a section of thick bamboo and is connected at torsion sensor's connecting axle one end through the shaft coupling, the connecting axle other end of torsion sensor has the connecting axle through the coupling, the connecting axle connection is on the top of axle two.
In order to realize the quick execution of contracting and expanding of sealing ring, preferably, the actuating mechanism that contracts and expands is including connecting the pipe that leads to in spandrel one end, the one end that leads to the pipe is connected with the connecting pipe, the one end of connecting pipe is provided with and is to press a section of thick bamboo, be the bottom one side of pressing a section of thick bamboo and be provided with the fixed plate, be provided with electric telescopic handle on the fixed plate, electric telescopic handle's power controlled end passes through cable connection peripheral driver two, electric telescopic handle's ejector pin one end is connected with the fagging, be provided with the area pole on the fagging, the one end of area pole is connected with the slide plug and the slide plug inserts and is to press a section of thick bamboo, transversely evenly be provided with the slide seal ring on the slide plug.
In order to ensure that the oil stored in the pressure cylinder meets the shrinkage and expansion condition of the sealing ring under long-term use, preferably, an inlet pipe is arranged on one side of the top of the pressure cylinder, a one-way valve is connected to the top of the inlet pipe, an oil inlet end of the one-way valve is connected with a stop valve, an oil inlet end of the stop valve is connected with a row connector, and a pressure gauge is screwed in the middle of the pressure cylinder.
In order to combine the torque data, realize the protection operation after the valve rod driving mechanism operates automatically matched with the shrinkage and expansion driving mechanism, preferably, the other side of the bearing disc is connected with a protection box through a fixed rod, a development board is arranged in the protection box, a control module is arranged on the development board, the control module comprises a first revolution steering control transmission module, the first revolution steering control transmission module is used for running the driver down to a motor according to an issued revolution steering instruction, the first revolution steering control transmission module is in transmission connection with a torque data receiving module, the torque data receiving module is used for receiving the torque data transmitted by a torque sensor in real time, the torque data receiving module is in transmission connection with a torsion resistance analysis module, whether the torsion resistance is normal or not is judged by comparing the normal torque data with the current torque data, the torsion resistance analysis module is in transmission connection with the first revolution steering control transmission module, the first revolution control transmission module is used for controlling the running instruction of a motor down to the driver, the first revolution control transmission module is in transmission connection with a revolution calculation module, the first revolution calculation module is used for calculating the revolution of the motor down to the driver down to the motor through the first revolution calculation module and the second revolution calculation module is in transmission of the expansion and contraction and expansion driving mechanism, the first revolution calculation module is used for calculating the revolution calculation of the revolution number of the revolution of the driver down to the motor down to a revolution calculation result, the first revolution number steering calculating module is in transmission connection with the first revolution number steering control and transmission module, and the first revolution number steering calculating module is also used for inputting unexecuted revolution number data to the first revolution number steering control and transmission module.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the operation of the valve rod driving mechanism, the butterfly plate is driven to open and close the valve, and during the period, the torque sensor monitors the torque generated in the process of driving the connecting shaft II by the motor in real time; and through the operation of the drive mechanism that expands that contracts, can realize that the sealing ring expands out and contracts for when the sealing ring contracts, take off the knot thing of adhering to on the sealing ring and break the separation because of the quick flat of sealing ring, and because the shrink of sealing ring, the butterfly plate rotatory in-process sealing ring can not cause the hard friction to the knot thing, avoids the sealing ring to break, thereby protection sealing ring and valve rod drive mechanism, thereby realize the operation protection to butterfly valve itself.
According to the invention, the valve rod driving mechanism, the shrinkage and expansion driving mechanism and the control module are matched together, so that the operation of the valve rod driving mechanism can be analyzed and controlled according to the rotation resistance condition of the butterfly plate, and the damage of the sealing ring caused by the fact that the rotation is continuously executed after the hard annular impurities exist at the periphery of the sealing ring is avoided. According to the rotation resistance of the butterfly plate, the shrinkage and expansion driving mechanism can be controlled to execute shrinkage and expansion of the sealing ring under different conditions, and after the sealing ring is shrunk, the motor is controlled to continuously execute the residual unexecuted revolution, so that the situation that hard annular impurities are formed by mutual nodules of particle media are tightly scraped on the inner wall of the valve body and even the sealing ring is protected and intelligently controlled.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view in partial cutaway of the front view of the present invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2 at a;
FIG. 4 is an enlarged schematic view of the expansion driving mechanism in FIG. 2;
FIG. 5 is a schematic view of a butterfly plate of the invention in transverse cross-section;
FIG. 6 is a schematic diagram of the connection of a butterfly plate to a vent pipe according to the present invention;
fig. 7 is a schematic diagram of connection of each module in the control module according to the present invention.
In the figure: 1 valve body, 2 butterfly plate, 3 baffle ring, 4 sealing ring, 5 net support, 6 row of holes, 7 valve rod, 8 connecting pipe, 9 soft ring, 10 packing ring, 11 gland, 12 seal ring, 13 support column, 14 bearing disc, 15 row of holes, 16 seal cover, 17 connecting shaft I, 18 first gear, 19 seal oil cover, 20 row of discharge pipes, 21 connecting shaft II, 22 second gear, 23 support cylinder, 24 motor, 25 coupler, 26 torsion sensor, 27 connecting shaft, 28 connecting pipe, 29 connecting pipe, 30 press cylinder, 31 fixed plate, 32 electric telescopic rod, 33 support plate, 34 belt rod, 35 sliding plug, 36 sliding seal ring, 37 leading-in pipe, 38 one-way valve, 39 stop valve, 40 row of joints, 41 pressure gauge, 42 fixed rod, 43 protecting box, 44 development plate and 101 convex ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, a butterfly valve with protection device, including valve body 1, be provided with butterfly plate 2 in the valve body 1, the outer fringe of butterfly plate 2 is integrative to be provided with keeps off ring 3 and keeps off and adopt waterproof powerful glue seal to bond in the ring 3 has sealing ring 4, sealing ring 4 itself is the neoprene that has nylon reinforcement fiber in the inside to make, the inner wall of valve body 1 is integrative to be provided with bulge loop 101 and sealing ring 4 compresses tightly bulge loop 101, when the hydraulic oil is gone into in the sealing ring 4, sealing ring 4 closely cladding is on bulge loop 101, guarantee sealing ring 4 and valve body 1 inner wall cooperation leakproofness. The butterfly plate 2 is internally provided with a first cavity, the first cavity is communicated with the inside of the sealing ring 4 through discharge holes 6 at two sides of the butterfly plate 2, the discharge manhole 6 is an arc-shaped opening, the top of the butterfly plate 2 is integrally provided with a valve rod 7, and a second cavity in the valve rod 7 is communicated with the first cavity in the butterfly plate 2;
therefore, when the second cavity in the valve rod 7 is filled with hydraulic oil, the hydraulic oil can enter the first cavity and is rapidly discharged into the sealing ring 4 through the discharge holes 6 at the two sides, so that the inside of the sealing ring 4 is inflated by the hydraulic oil; conversely, when hydraulic oil is rapidly discharged through the second cavity 7, the hydraulic oil loses the inner wall of the sealing ring 4 to be propped and supported, and when the hydraulic oil is recovered, the sealing ring 4 is shrunken, the nodules attached to the sealing ring 4 are broken and separated due to rapid shrinkage of the sealing ring 4, and due to shrinkage of the sealing ring 4, the sealing ring 4 cannot cause hard friction to the nodules in the rotation process of the butterfly plate 2, the sealing ring 4 is prevented from being broken, and therefore the sealing ring 4 and the valve rod driving mechanism are protected.
The upper part of the valve body 1 is provided with a sealing valve cover, the valve rod 7 penetrates out of the valve body 1 and penetrates through the sealing valve cover, and the sealing valve cover is used for sealing the valve body 1 by matching with the valve rod 7;
the both sides butt fusion of valve body 1 has support column 13 and the top bolt fastening of support column 13 has basin 14, and valve rod 7 penetrates in basin 14 and valve rod 7 is located the position annular that basin 14 is equipped with row's hole 15, and the top of basin 14 sets up valve rod actuating mechanism, and valve rod actuating mechanism is used for driving valve rod 7 rotation and stopping valve rod 7, and one side of basin 14 is provided with the drive mechanism that contracts and expands, contracts and expands drive mechanism and is used for controlling sealing ring 4 to expand and contract outward.
Referring to fig. 2, 3 and 5, the outer edge of the butterfly plate 2 is uniformly adhered with a net support 5 in a circumferential direction, the net support 5 is made of ultra-high molecular weight polyethylene fiber braided wires with the diameter of 0.5 mm, and the net support 5 is adhered and supported on the inner wall of the sealing ring 4.
The arrangement of the net support 5 plays a role in realizing the inner rib protection for the sealing ring 4 in the expanding and shrinking processes of the sealing ring 4.
Referring to fig. 1 and 2, the sealing valve cover comprises an annular groove arranged at the top of the valve body 1, an inherent bearing ring is embedded in the annular groove in a sealing manner, the valve rod 7 penetrates through the bearing ring, the bearing ring is made of graphite copper alloy, and the size of the bearing ring is as follows: the valve rod 7 has good sealing performance in cooperation with the valve rod, and the valve rod 7 can rotate in the valve rod. The valve body 1 is fixedly provided with the connecting pipe 8 by adopting the annular bolt, the top of the connecting pipe 8 and the valve body 1 are provided with the annular groove, the soft ring 9 is tightly pressed in the annular groove, and when the connecting pipe 8 is fixedly arranged on the valve body 1 by adopting the annular bolt, the inner wall of the annular groove is tightly pressed on the soft ring 9, so that the soft ring 9 is tightly pushed down on the inner wall of the annular groove, and the fit between the connecting pipe 8 and the valve body 1 has better tightness. The ring groove and the connecting pipe 8 are filled with a packing ring 10, and the packing ring 10 is formed by compacting nano spherical graphite powder in the ring groove and the connecting pipe 8. The top of taking over 8 adopts hoop bolt locking to be fixed with gland 11 and gland 11 to impress in packing ring 10, and when gland 11 compressed tightly packing ring 10, packing ring 10 not only forms sealed extrusion to the inner wall of taking over 8 and the annular inner wall of annular production, simultaneously to the outer wall of valve rod 7 to let in the medium can not scurry through valve rod 7 and sealing valve gap cooperation department in the valve body 1, and because packing ring 10 self possesses lubricity, can not cause valve rod 7 to be sticis locked. The sealing ring 12 is embedded in the center seal of the gland 11, the sealing ring 12 is made of graphite copper, the valve rod 7 penetrates through the sealing ring 12 in a sliding mode, and the valve rod 7 rotates more stably under the supporting effect of the sealing ring 12 and the supporting ring.
Therefore, under the action of the sealing valve cover, the valve rod 7 is well rotationally stabilized, and under the cooperation of the valve rod and the sealing valve cover, the fluid in the valve body 1 can not be discharged through the cooperation of the valve rod and the sealing valve cover.
Referring to fig. 2, a slot is formed in the upper and lower positions of the central part of the bearing plate 14, sealing bearings are embedded in the slots, a slip ring is embedded in the slots in a sealing manner, the slip ring is made of graphite copper, the valve rod 7 is in sealing interference fit with an inner ring of the sealing bearings, the valve rod 7 is matched with the slip ring, the valve rod 7 can rotate in the slip ring, and the valve rod 7 is matched with the slip ring to have good sealing performance.
The valve rod 7 can rotate in the center of the carrier plate 14, and when hydraulic oil is introduced into the carrier plate 14, the hydraulic oil cannot be discharged through the rotary fit between the valve rod 7 and the carrier plate 14.
Referring to fig. 1, 2 and 6, the valve rod driving mechanism comprises a sealing cover 16 which is locked and fixed on a bearing plate 14 by adopting a circumferential bolt, sealing ring grooves are formed in the bottom of the sealing cover 16 and the bearing plate 14, an oil immersion asbestos packing ring is tightly pressed in the sealing ring grooves, good sealing performance of the sealing cover 16 and the bearing plate 14 is achieved, a valve rod 7 penetrates into the sealing cover 16, a first connecting shaft 17 is integrally arranged at the central position of the upper end of the valve rod 7 penetrating into the sealing cover 16, and a first gear 18 is connected with an interference key on the first connecting shaft 17; the second connecting shaft 21 is rotatably arranged on the left side in the sealing cover 16, the second connecting shaft 21 is connected with the second gear 22 through an interference key, the second gear 22 is meshed with the first gear 18, and the second gear 22 is 4 times of a rotating force arm of the first gear 18, so that the motor 24 drives the second gear 22 to rotate more labor-saving; the top left side screw fixation of closing cap 16 has a support section of thick bamboo 23, the top bolt fastening of a support section of thick bamboo 23 has motor 24, magnetism band-type brake mechanism is installed to motor 24's afterbody for motor 24 shut down the auto-lock, motor 24's power controlled end passes through the cable and connects peripheral driver one, the right side bolt fastening has a torsion sensor 26 in the support section of thick bamboo 23, motor 24's rotor shaft penetrates a support section of thick bamboo 23 and passes through coupling 25 to be connected at torsion sensor 26's connecting axle one end, torsion sensor 26 is shaft type torsion sensor, torsion sensor 26's connecting axle lower extreme is connected with connecting axle 27 through coupling 25, connecting axle 27 interference key connects the top of connecting axle two 21.
The motor 24 drives the second gear 22 to rotate, and the second gear 22 is meshed with the first gear 18 to drive the valve rod 7 to rotate, so that the butterfly plate 2 is driven to rotate; during this period, the torsion sensor 26 monitors the torsion generated during the driving of the connecting shaft two 21 by the motor 24 in real time.
The top right side of closing cap 16 is provided with row's of being responsible for a whole and is provided with the pipe 20, and the top spiro union of row's of being responsible for 20 has oil closing cap 19, and the interior top of closing cap 19 is equipped with the annular, inserts the rubber ring in the annular, when closing cap 19 locking on row's of being responsible for 20, can prevent the lubricating oil in the closing cap 16 to discharge through row's of responsible for 20.
And the lubricant is added into the sealing cover 16 through the drain pipe 20 and is immersed into the first gear 18 and the second gear 22, so that continuous lubrication and barrier protection of the first gear 18 and the second gear 22 in cooperation can be realized.
Referring to fig. 1, 2 and 4, the expansion driving mechanism comprises a through pipe 28 integrally arranged at the right end of the bearing plate 14, the through pipe 28 is communicated with the inside of the bearing plate 14, a right end flange of the through pipe 28 is in sealing connection with a connecting pipe 29, a pressure cylinder 30 is integrally arranged at the right end of the connecting pipe 29, a fixing plate 31 is fixed on the left side of the bottom of the pressure cylinder 30 through a bolt, an electric telescopic rod 32 is fixed on the fixing plate 31 through a bolt, a power supply controlled end of the electric telescopic rod 32 is connected with a peripheral driver II through a cable, a supporting plate 33 is fixed on a bolt at the right end of a push rod of the electric telescopic rod 32 through a bolt, a belt rod 34 is fixed on the supporting plate 33 through a bolt, a sliding plug 35 is fixed at the left end of the belt rod 34 and inserted into the pressure cylinder 30, an annular groove is uniformly arranged on the sliding plug 35 transversely, a sliding ring 36 is bonded in the annular groove, the sliding ring 36 is made of neoprene, and the sliding ring 36 is tightly pressed on the inner wall of the pressure cylinder 30 so as to ensure the matching tightness of the sliding plug 35 and the pressure cylinder 30 in the transverse moving process.
The ejector rod of the electric telescopic rod 32 stretches to drive the sliding plug 35 to move left and right in the pressing cylinder 30, so that hydraulic oil in the pressing cylinder 30 is effectively supplied and sucked, and the following needs to be described: when the sealing ring 4 is tightly pressed on the convex ring 101, the sealing ring is in a state of being full of hydraulic oil in the pressing cylinder 30, the bearing plate 14, the valve rod 7, the butterfly plate 2 and the sealing ring 4, and the hydraulic oil is subjected to hole discharging treatment before initial addition, so that the sealing ring 4 can be driven to expand and contract in the ejector rod expansion process of the electric telescopic rod 32.
Referring to fig. 1, 2 and 4, an inlet pipe 37 is integrally arranged on the left side of the top of the pressure cylinder 30, a one-way valve 38 is connected to the top flange of the inlet pipe 37, a stop valve 39 is connected to the oil inlet end flange of the one-way valve 38, a discharge joint 40 is connected to the oil inlet end flange of the stop valve 39, the discharge joint 40 is used for connecting an oil discharge pipe of a pneumatic high-pressure oiling machine and supplementing hydraulic oil to a contraction and expansion driving mechanism, a pressure gauge 41 is connected to the middle of the pressure cylinder 30 in a screwed mode, and the pressure gauge 41 is used for checking the pressure of hydraulic oil in the pressure cylinder 30 when the sealing ring 4 expands, so that whether the hydraulic oil needs to be supplemented is confirmed.
Therefore, when hydraulic oil needs to be replenished to the pressure cylinder 30, the oil drain pipe of the pneumatic high-pressure oiling machine can be connected with the oil drain connector 40, the stop valve 39 is opened, the pneumatic high-pressure oiling machine is started, the pneumatic high-pressure oiling machine can be stopped to operate until the pressure value in the pressure gauge 41 reaches the required state, and then the stop valve 39 is closed; when the hydraulic oil in the pressure cylinder 30 is reduced due to the ageing of the sealing part of the sealing mechanism of the shrinkage and expansion driving mechanism and the like, the hydraulic oil can be supplemented in the mode, so that the effectiveness of shrinkage and expansion control of the shrinkage and expansion driving mechanism on the sealing ring 4 is ensured.
Referring to fig. 1, 2, 5 and 7, a fixing rod 42 is welded on the left side of a bearing plate 14, a protection box 43 is fixed on the left end bolt of the fixing rod 42, a development plate 44 is fixed in the protection box 43, a control module is arranged on the development plate 44, the control module comprises a first revolution turning control transmission module, the first revolution turning control transmission module is used for running a down motor 24 to a driver according to a down revolution turning instruction, in addition, a signal access end of the first revolution turning control transmission module of the opening plate 44 is connected with a signal output end of a peripheral PLC controller through a signal wire, the peripheral PLC is used for down turning and turning control, the transmission of a revolution turning control signal into the first revolution turning control transmission module is realized, the revolution turning control signal number is A, the setting of A needs to meet the normal valve requirement of a butterfly plate 2 and the closed valve sealing ring 4 is effectively pressed on a convex ring 101; the first rotation number steering control transmission module is connected with a torsion data receiving module in a transmission way, wherein a transmission line of the torsion sensor 26 is connected to a signal receiving pin of the torsion data receiving module on the development board 44, and the torsion data receiving module is used for receiving torsion data uploaded by the torsion sensor 26 in real time, so that torsion data in the current process of rotating the butterfly board 2 is provided for the torsion resistance analysis module; the torsion data receiving module is in transmission connection with the torsion resistance analysis module, the torsion resistance analysis module judges whether the torsion resistance is normal or not through comparing the normal torsion data with the current torsion data, the normal torsion data is numbered as D, the current torsion data is numbered as S, when S-D is more than 8N.m, the torsion resistance analysis module judges that the rotation of the butterfly plate 2 is blocked, the torsion resistance analysis module judges that the rotation of the butterfly plate 2 is slightly blocked when S-D is more than 0N.m and less than 8N.m, the torsion resistance analysis module judges that the rotation of the butterfly plate 2 is slightly unblocked when S-D is less than or equal to 0N.m, and the torsion resistance analysis module judges that the rotation of the butterfly plate 2 is slightly unblocked and the torsion resistance analysis module judges that the instruction number is T3; the torsion resistance analysis module is in transmission connection with the first revolution number steering control transmission module, the torsion resistance analysis module also controls the first revolution number steering control transmission module to give an operation instruction to the driver and give the motor 24 to the driver, when the judgment instruction is T1 or T2, the revolution number steering control transmission module gives the driver a suspension operation instruction to the motor 24, and when the judgment instruction is T3, the first revolution number steering control transmission module does not give the driver a suspension operation instruction to the motor 24.
The torque resistance analysis module is connected with a second rotation number steering calculation module in a transmission mode, the second rotation number steering calculation module is used for calculating the rotation number and steering of a driving motor for issuing an electric telescopic rod 32 to a second driver through the analysis result of the torque resistance analysis module, the second rotation number steering calculation module is connected with a second rotation number steering control transmission module in a transmission mode, the second rotation number steering control transmission module is used for issuing a driving motor for issuing the electric telescopic rod 32 to the second driver and running according to an issued rotation number steering instruction, a signal output pin of the second rotation number steering control transmission module of the development board 44 is connected with a signal input end of the second driver through transmission, wherein the judgment instruction is T1, the second rotation number steering calculation module calculates and generates a rotation number steering Q1 instruction, and the Q1 instruction meets the following conditions: after the ejector rod of the electric telescopic rod 32 extends out, the amount of hydraulic oil sucked by the pressure cylinder 30 is more than seven eighth of the total hydraulic oil stored amount after the sealing ring 4 is expanded; the judging instruction is T2, the revolution number steering calculating module II calculates and generates a revolution number steering Q2 instruction, and the Q2 instruction meets the following conditions: after the ejector rod of the electric telescopic rod 32 stretches out, the amount of hydraulic oil sucked by the pressure cylinder 30 is more than one half of the total hydraulic oil storage amount after the sealing ring 4 expands and less than two thirds, the judgment instruction is T3, the rotation number steering calculation module II calculates to generate a rotation number steering Q3 instruction, and the Q3 instruction is that the electric telescopic rod 32 keeps not running.
The first revolution number steering calculating module is connected with the first revolution number steering calculating module in a transmission way, a signal access pin of the first revolution number steering calculating module of the development board 44 is connected with a signal access pin of the peripheral PLC controller through a transmission line, the first revolution number steering calculating module is used for calculating the unexecuted revolution number of the driver, and before the sealing ring 4 is shrunken by sucking hydraulic oil, the first revolution number steering calculating module monitors the executed revolution number and the unexecuted revolution number of the peripheral PLC controller in real time, so after the torque resistance analysis module sends a T1 or T2 judgment instruction, the first revolution number steering calculating module rapidly positions the cut-off operation revolution number of the peripheral PLC controller for a while, the first revolution number steering calculating module is connected with the first revolution number steering calculating module in a transmission way, and the first revolution number steering calculating module is also used for inputting unexecuted revolution number data to the first revolution number steering control module.
In addition, after the execution of the instruction of turning the rotation number by closing the valve of the butterfly plate 2, the second rotation number turning control and transmission module outputs a Q4 instruction to the second driver, and the Q4 instruction meets the following conditions: the ejector rod of the electric telescopic rod 32 is retracted, and the hydraulic oil filled in the sealing ring 4 enables the sealing ring 4 to be effectively pressed on the convex ring 101.
Therefore, under the action of the control module, the operation of the valve rod driving mechanism can be analyzed and controlled according to the rotation resistance condition of the butterfly plate 2, and the damage of the sealing ring 4 caused by the fact that the rotation is continuously executed after the hard annular impurities exist at the periphery of the sealing ring 4 is avoided; according to the rotation resistance condition of the butterfly plate 2, the contraction and expansion driving mechanism can be controlled to execute contraction and expansion of the sealing ring 4 according to different conditions, and after the sealing ring 4 contracts and holds back, the motor 24 is controlled to continuously execute the residual unexecuted revolution, so that intelligent pre-control of the condition that hard annular impurities are formed by mutual nodules of granular media and are tightly scraped on the inner wall of the valve body 1 and even the sealing ring 4 is realized.
The working principle of this embodiment is as follows:
valve stem driving mechanism: the motor 24 drives the second gear 22 to rotate, and the second gear 22 is meshed with the first gear 18 to drive the valve rod 7 to rotate, so that the butterfly plate 2 is driven to rotate; during the period, the torsion sensor 26 monitors the torsion generated during the process of driving the connecting shaft II 21 by the motor 24 in real time;
shrinkage and expansion driving mechanism: the ejector rod of the electric telescopic rod 32 stretches to drive the sliding plug 35 to move left and right in the pressure cylinder 30, so that hydraulic oil in the pressure cylinder 30 is effectively supplied and sucked, and the sealing ring 4 can be driven to expand and contract in the stretching process of the ejector rod of the electric telescopic rod 32; when hydraulic oil is recovered in the pressure cylinder 30, the sealing ring 4 is shrunken, the nodules attached to the sealing ring 4 are broken and separated due to the rapid shrinkage of the sealing ring 4, and the sealing ring 4 cannot cause hard friction on the nodules in the rotation process of the butterfly plate 2 due to the shrinkage of the sealing ring 4, so that the sealing ring 4 is prevented from being broken, the sealing ring 4 and the valve rod driving mechanism are protected, and the operation protection of the butterfly valve is realized;
valve rod actuating mechanism, shrink and expand actuating mechanism and control module: under the action of the control module, the operation of the valve rod driving mechanism can be analyzed and controlled according to the rotation resistance condition of the butterfly plate 2, so that the damage of the sealing ring 4 caused by the fact that the rotation is continuously carried out after the hard annular impurities exist at the periphery of the sealing ring 4 is avoided; according to the rotation resistance condition of the butterfly plate 2, the shrinkage and expansion driving mechanism can be controlled to execute shrinkage and expansion of the sealing ring 4 according to different conditions, and after the sealing ring 4 is shrunk, the motor 24 is controlled to continuously execute the residual unexecuted revolution, so that protective intelligent pre-control is realized for the condition that hard annular impurities formed by mutual nodules of granular media are tightly scraped on the inner wall of the valve body 1 and even the sealing ring 4.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A butterfly valve with protection device, characterized in that: the valve comprises a valve body (1), wherein a butterfly plate (2) is arranged in the valve body (1), a baffle ring (3) is arranged at the outer edge of the butterfly plate (2) and a sealing ring (4) is arranged in the baffle ring (3), a convex ring (101) is arranged on the inner wall of the valve body (1) and the sealing ring (4) compresses the convex ring (101), a first cavity is arranged in the butterfly plate (2) and is communicated with the sealing ring (4) through a discharge hole (6) at two sides of the butterfly plate (2), and a valve rod (7) is arranged at the top of the butterfly plate (2) and a second cavity in the valve rod (7) is communicated with the first cavity in the butterfly plate (2);
the upper part of the valve body (1) is provided with a sealing valve cover, the valve rod (7) penetrates out of the valve body (1) and penetrates through the sealing valve cover, and the sealing valve cover is used for sealing the valve body (1) by matching with the valve rod (7);
the valve body is characterized in that support columns (13) are connected to two sides of the valve body (1) and support columns (13) are arranged at the tops of the support columns (13), a support disc (14) is arranged at the tops of the valve rods (7) penetrating into the support disc (14), row holes (15) are formed in the positions, located by the support disc (14), of the valve rods (7), valve rod driving mechanisms are arranged at the tops of the support disc (14) and used for driving the valve rods (7) to rotate and stop the valve rods (7), and shrinkage and expansion driving mechanisms are arranged on one sides of the support disc (14) and used for controlling the sealing rings (4) to expand and contract outwards.
2. A butterfly valve with protection device according to claim 1, characterized in that: the outer edge of the butterfly plate (2) is uniformly provided with net supporting frames (5) in a circumferential direction, and the net supporting frames (5) are supported on the inner wall of the sealing ring (4).
3. A butterfly valve with protection device according to claim 1, characterized in that: the sealing valve cover comprises a ring groove arranged at the top of a valve body (1), a bearing ring is arranged in the ring groove, a connecting pipe (8) is fixedly arranged on the valve body (1), the top of the connecting pipe (8) and the top of the valve body (1) are provided with the ring groove and a soft ring (9) is arranged in the ring groove, a packing ring (10) is arranged in the ring groove and the connecting pipe (8), a pressing cover (11) is arranged at the top of the connecting pipe (8) and is pressed into the packing ring (10), and a sealing ring (12) and a valve rod (7) penetrate through the sealing ring (12) at the center of the pressing cover (11).
4. A butterfly valve with protection device according to claim 1, characterized in that: the upper and lower positions of the central part of the bearing disc (14) are provided with grooves, sealing bearings are arranged in the grooves, sliding rings are further arranged in the grooves, and the valve rod (7) penetrates through the inner rings of the sealing bearings and the sliding rings.
5. A butterfly valve with protection device according to claim 1, characterized in that: the valve rod driving mechanism comprises a sealing cover (16) fixedly arranged on a bearing disc (14), one end of the valve rod (7) penetrating into the sealing cover (16) and one end of the valve rod (7) penetrating into the sealing cover (16) is connected with a first connecting shaft (17), a first gear (18) is arranged on the first connecting shaft (17), a discharging pipe (20) is arranged on one side of the top of the sealing cover (16), an oil sealing cover (19) is screwed on the top of the discharging pipe (20), a second connecting shaft (21) is rotatably arranged on one side in the sealing cover (16), a second gear (22) is fixedly arranged on the second connecting shaft (21) and meshed with the first gear (18), a supporting cylinder (23) is arranged on the other side of the top of the sealing cover (16), a motor (24) is arranged on the top of the supporting cylinder, a power supply controlled end of the motor (24) is connected with a first peripheral driving device through a cable, a force sensor (26) is arranged on one side in the supporting cylinder (23), a rotor (24) penetrates into the rotor (25) and is connected with one end of the other end of the supporting cylinder (25) through a torque sensor (25), the connecting shaft (27) is connected to the top end of the connecting shaft II (21).
6. A butterfly valve with protection device according to claim 1, characterized in that: the utility model provides a shrink and expand actuating mechanism is including connecting the pipe (28) that leads to in carrier disc (14) one end, the one end that leads to pipe (28) is connected with connecting pipe (29), the one end of connecting pipe (29) is provided with and is pressure section of thick bamboo (30), be bottom one side that presses section of thick bamboo (30) is provided with fixed plate (31), be provided with electric telescopic handle (32) on fixed plate (31), the power controlled end of electric telescopic handle (32) passes through cable connection peripheral driver two, ejector pin one end of electric telescopic handle (32) is connected with fagging (33), be provided with on fagging (33) and take pole (34), the one end of taking pole (34) is connected with slide plug (35) and slide plug (35) inserts and is pressure section of thick bamboo (30), transversely evenly be provided with on slide plug (35) and slide seal ring (36).
7. A butterfly valve with protection device according to claim 6, wherein: the novel hydraulic pressure cylinder is characterized in that an inlet pipe (37) is arranged on one side of the top of the pressure cylinder (30), a one-way valve (38) is connected to the top of the inlet pipe (37), a stop valve (39) is connected to the oil inlet end of the one-way valve (38), a row of connectors (40) are connected to the oil inlet end of the stop valve (39), and a pressure gauge (41) is screwed to the middle of the pressure cylinder (30).
8. A butterfly valve with protection device according to claim 6, wherein: the other side of the bearing plate (14) is connected with a protection box (43) through a fixed rod (42), a development board (44) is arranged in the protection box (43), a control module is arranged on the development board (44), the control module comprises a first rotation number steering control transmission module, the first rotation number steering control transmission module is used for transmitting an operation command of a motor (24) to a driver according to the issued rotation number steering command, the first rotation number steering control transmission module is connected with a torque data receiving module in a transmission manner, the torque data receiving module is used for receiving torque data transmitted by a torque sensor (26) in real time, the torque data receiving module is connected with a torsion resistance analysis module, the torsion resistance analysis module judges whether the torsion resistance is normal or not through the comparison of normal torque data with the current torque data, the torsion resistance analysis module is connected with the first rotation number steering control transmission module, the torsion resistance analysis module is also used for controlling the rotation number steering calculation module to transmit an operation command of a motor (24) to the driver, the second rotation number calculation module is connected with the rotation number calculation module through the first rotation number calculation module and the second rotation number calculation module, the rotation number calculation module is connected with the second rotation number calculation module is used for transmitting the rotation number calculation command of the driver (32) to the driver through the second rotation number calculation module, the rotation number calculation module is connected with the second rotation number calculation module, the first revolution number steering calculating module is used for calculating the unexecuted revolution number of the first driver, the first revolution number steering calculating module is in transmission connection with the first revolution number steering control transmission module, and the first revolution number steering calculating module is also used for inputting unexecuted revolution number data to the first revolution number steering control transmission module.
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| CN202311460763.XA CN117189885B (en) | 2023-11-06 | 2023-11-06 | Butterfly valve with protection device |
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| CN202311460763.XA CN117189885B (en) | 2023-11-06 | 2023-11-06 | Butterfly valve with protection device |
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