CN114719038A

CN114719038A - Gate valve with anti-blocking function

Info

Publication number: CN114719038A
Application number: CN202210426761.8A
Authority: CN
Inventors: 苏林峰; 毛通连
Original assignee: Jinbo Valve Group Co ltd
Current assignee: Jinbo Valve Group Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-07-08
Anticipated expiration: 2042-04-21
Also published as: CN114719038B

Abstract

The invention discloses a gate valve with an anti-blocking function, and belongs to the technical field of valves. The invention comprises a valve body, wherein a flashboard and an over-control mechanism are arranged inside the valve body, the flashboard plugs the valve body, sealing assemblies are arranged on two sides of the flashboard, the two sealing assemblies are arranged on the valve body and are used for sealing between the valve body and the flashboard, the over-control mechanism is used for controlling the flow of a gate valve, and a main control mechanism is arranged outside the valve body and controls the flashboard and the over-control mechanism.

Description

Gate valve with anti-blocking function

Technical Field

The invention relates to the technical field of valves, in particular to a gate valve with an anti-blocking function.

Background

The gate valve is a valve which is opened and closed by utilizing a gate plate, the movement direction of the gate plate is vertical to the fluid direction, the gate valve is very commonly used in the industrial field, because a medium flows linearly, the flow resistance caused by the medium is small, the gate valve is labor-saving when opened and closed, and because the closing time is long, the phenomenon of water hammer can be avoided, and the gate valve has certain protectiveness on a pipeline system.

However, the advantages and disadvantages of the gate valve coexist, it is too time-consuming to manually close the gate valve, abrasion exists between the sealing surfaces of the valve seat and the valve core, long-term abrasion can cause the reduction of the sealing performance of the gate valve, secondly, the gate valve can only be fully opened and fully closed, and cannot have the functions of a regulating valve and a throttling valve, the requirement on the treatment capacity of a pipeline system is high, because the process of the gate valve is simple, the gate valve also has wide application in a sewage treatment system, but the water trapping problem of the gate valve often causes the accumulation of substances in the valve cavity, the valve cavity is blocked, the opening and closing mechanism of the valve body is blocked and fails, and therefore, the gate valve is often required to be maintained and replaced.

Disclosure of Invention

The invention aims to provide a gate valve with an anti-blocking function, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a gate valve with prevent blockking up function, includes the valve body, the inside of valve body is provided with the flashboard, crosses control mechanism, the flashboard carries out the shutoff to the valve body, and the both sides of flashboard all are provided with seal assembly, two seal assembly all installs on the valve body, and two seal assembly are used for the sealed between valve body and the flashboard, cross the flow that control mechanism is used for controlling the gate valve, the outside of valve body is provided with main control mechanism, main control mechanism controls the flashboard and cross control mechanism.

Furthermore, each sealing assembly comprises a concave sealing ring, a steel sealing ring and a rubber ring, wherein the concave sealing ring is arranged in the valve body, the steel sealing ring is arranged in a groove of the concave sealing ring, the rubber ring is arranged at one end of the steel sealing ring, the two rubber rings are close to each other, and the two rubber rings are both in contact with the flashboard;

the flashboard includes left flashboard, right flashboard, changes flashboard and connecting bridge, it all sets up between left flashboard and right flashboard with the connecting bridge to change the flashboard, one side that left flashboard and right flashboard dorsad changeed the flashboard contacts with two rubber rings respectively, the face that left flashboard and right flashboard and rubber ring contact is sealed plane, two the extension of sealed plane in the space is personally submitted the V font and is intersected, operating personnel anticlockwise rotation hand wheel, the hand wheel drives drive nut and rotates and make the valve rod rise, the flashboard rises, the gate valve is opened completely, the medium flows in the valve body, when needing to close the gate valve, operating personnel clockwise rotation hand wheel, the flashboard descends, because the sealed plane nonparallel of left flashboard and right flashboard, the upper portion width L1 of flashboard is greater than flashboard lower part width L2, distance between two rubber rings is L3, L3 is greater than L2 and is less than L1, after the flashboard falls completely, the rubber rings on two sides of the gate plate are extruded to enable the two steel sealing rings to incline, the upper half parts of the two steel sealing rings extrude the two concave sealing rings to the outer side of the valve body, and the lower half parts of the two steel sealing rings extrude the two concave sealing rings to the inner side of the valve body, so that the two sealing assemblies, the valve body and the gate plate form tight sealing;

compared with continuous friction between a parallel gate plate and a valve seat, the friction time generated between the gate plate and the sealing assembly is short, the abrasion positions are concentrated, the rigid sealing ring is inclined along with the closing of the gate plate, the abrasion part is compensated, and the sealing performance of the gate valve is greatly improved.

Further, the change flashboard all rotates with left flashboard and right flashboard to be connected, and a magnet is all installed to the inside of left flashboard and right flashboard, two one side polarity that magnet is close to the change flashboard is different, the inside coil winding that is provided with of change flashboard, the internally mounted of right flashboard has two brush rings, two brush ring is connected with the coil winding, and two brush rings still are connected with alternating current circuit, and the back is closed to the gate valve, still long-pending fluid medium that stays in the valve pocket, deposit and impurity among the fluid medium deposit in the valve pocket, supply power to two brush rings through the alternating current circuit, let in the coil winding, produce rotatory magnetic field in the coil winding, receive the magnetic field effect that two magnet floodgates produced, change the flashboard and rotate between left flashboard and right flashboard.

Furthermore, a plurality of slide ways are arranged inside the rotary flashboard, a centrifugal slider is slidably mounted in each slide way, a step through hole is formed inside each centrifugal slider, a reset spring is arranged between each centrifugal slider and the rotary flashboard, a guide rod is fixedly mounted in each slide way, each guide rod is slidably connected with the centrifugal slider in the same slide way, the guide rods block the step through holes, a water pumping groove is formed inside the left flashboard and communicated with the slide ways, all the centrifugal sliders extend outwards under the action of centrifugal force when the rotary flashboard rotates, the extending centrifugal sliders disturb fluid media accumulated in the valve cavity to prevent impurity deposition, after the centrifugal sliders extend out completely, the step through holes are opened by the guide rods, and the valve cavity is communicated with the water pumping groove, the water outlet and the valve rod through the step through holes, the suction pump is started, impurities in the valve cavity are pumped out by the suction pump along with accumulated fluid media, the inside of the valve cavity can be flushed, the water trapping problem of the valve cavity is solved, the valve cavity is prevented from being blocked due to accumulation of the impurities in the fluid media, and the phenomenon of blocking failure of the valve body opening and closing mechanism is relieved to a great extent.

Further, the main control mechanism includes the valve rod, the second section of valve rod is the optical axis, and the first section of valve rod is seted up threadedly, and the lower extreme and the connecting bridge of valve rod are connected, and the optical axis part and the valve body sliding connection of valve rod are provided with a plurality of layers of sealing washer with the junction of valve body, the top of valve body is provided with first dust cover, be connected through the pillar between first dust cover and the valve body, and first dust cover internal rotation installs drive nut, drive nut cooperatees with the screw thread on the valve rod, and drive nut's top fixed mounting has the hand wheel.

Further, main control mechanism includes servo motor, support, servo motor passes through the support mounting on the valve body, still install the second dust cover on the support, the tooth's socket has been seted up in drive nut's the outside, be connected with the gear shaft on servo motor's the motor shaft, install master gear and pinion on the gear shaft, the master gear is located first dust cover, and the master gear meshes with the tooth's socket mutually, the pinion is located the second dust cover, and servo motor drives the gear shaft and rotates, and epaxial master gear of gear and pinion rotate simultaneously, and the master gear drives drive nut and rotates to realize the manual and automatic function of opening and close of gate valve.

Further, still rotate in the second dust cover and install reduction gear, reduction gear and pinion meshing transmission are connected with the reduction shaft on the reduction gear, still be provided with the reduction gear on the valve body, the input in reduction shaft and the reduction gear is connected, receive and release the wheel is installed to the output of reduction gear, and the gate valve is at the in-process of opening, and the pinion drives reduction gear and rotates, and reduction gear's torque passes through the reduction shaft and inputs the reduction gear in, and the output slow rotation of reduction gear drives and receives and releases the wheel and carry out the rolling or relax to the cable wire.

Furthermore, the over-control mechanism comprises a over-control plate and a centering rod, the centering rod is rotatably installed on the valve body, a pair of sliding blocks is symmetrically arranged on the centering rod, a cavity is formed in the over-control plate, sliding grooves are formed in two sides of the over-control plate, the centering rod penetrates through the cavity, a thrust spring is arranged between the centering rod and the cavity, the pair of sliding blocks are respectively installed in the two sliding grooves in a sliding mode, a guide hole is formed in the centering rod, a steel cable is arranged in the guide hole, one end of the steel cable is connected into the cavity, the other end of the steel cable is wound on the take-up and pay-off wheel, a protruding block is arranged at one end, extending out of the valve body, of the centering rod, a limiting ring is arranged at the position, corresponding to the protruding block, when fluid medium flows in the valve body, the fluid medium can pass through the over-control plate, the over-control plate rotates around the centering rod, the centering rod is rotatably installed at the position on the upper portion of the horizontal center line of the section of the valve body, the area S1 of the upper portion of the over-control plate on the centering rod is smaller than the area S2 of the lower portion of the centering rod, the over-control plate has flow resistance to the fluid medium, the lower portion of the over-control plate deflects towards the outer side of the valve body, when the flow of the fluid medium floats or suddenly increases, the resistance of the upper portion of the over-control plate to the fluid medium increases, the deflection angle of the over-control plate decreases, the resistance of the lower portion of the over-control plate to the fluid medium also gradually increases, and the pressure and the flow of the fluid medium after flowing through the over-control plate both decrease.

When the gate valve is closed, the steel cable is slowly loosened by the retracting wheel, the passing control plate moves downwards relative to the centering rod under the action of the thrust spring, the area S1 at the upper part of the passing control plate is reduced, the area S2 at the lower part of the passing control plate is increased, and the resistance of the passing control plate to a fluid medium is reduced; when the gate valve is opened, the steel cable is slowly wound by the winding and unwinding wheel, the passing control plate moves upwards relative to the centering rod under the action of the thrust spring, the difference between the area S1 at the upper part of the passing control plate and the area S2 at the lower part of the passing control plate is reduced, the resistance of the passing control plate to the fluid medium is increased, the gate valve can adjust the flow and pressure of the fluid medium in real time, throttling and pressure regulating are carried out, and the load of a pipeline system is reduced.

Furthermore, a water outlet is formed in the connecting bridge and is communicated with the water pumping groove, the valve rod is of a hollow structure, the hollow part is communicated with the water outlet, and the top of the valve rod is connected with a water pumping pump through a hose.

Compared with the prior art, the invention has the following beneficial effects:

1. two sealed planes of flashboard nonparallel, it is wider than the lower part to the upper portion that makes the flashboard, the rubber ring of back extrusion both sides is closed completely to the flashboard, make two steel seal ring slope, two steel seal ring extrude two concave type seal ring to the valve body, make and form inseparable sealed between two seal assembly and valve body and the flashboard, compare in the continuous friction between parallel flashboard and the disk seat, the friction time that produces between flashboard and the seal assembly is short, the wearing and tearing position is concentrated, the steel seal ring can compensate the wearing and tearing position after inclining along with the flashboard, make the sealing performance of gate valve promote by a wide margin.

2. Through set up coil winding circuit in the flashboard, make the commentaries on classics flashboard rotatory between left flashboard and right flashboard, centrifugal slider outwards stretches out under the effect of centrifugal force, the fluid medium that stays in the valve pocket disturbs, prevent impurity deposition, start the suction pump and take out the impurity in the valve pocket in the lump with the fluid medium that stays, not only can wash away the valve pocket inside, and the stranded water problem of valve pocket has been solved, with the impurity accumulation in preventing the fluid medium, cause the jam to the valve pocket, to a great extent has been alleviated the valve body starting and stopping mechanism and has appeared the dead malfunctioning phenomenon of card.

3. The control plate is arranged in the valve body, the control plate has flow resistance to fluid media, the lower part of the control plate deflects towards the outer side of the valve body, when the flow of the fluid media floats or suddenly increases, the resistance of the upper part of the control plate to the fluid media increases, the deflection angle of the control plate is reduced, the resistance of the lower part of the control plate to the fluid media is also gradually increased, the pressure and the flow of the fluid media after flowing through the control plate are both reduced, the flow and the pressure of the fluid media are adjusted in real time, throttling and pressure adjusting are performed, and the load of a pipeline system is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall appearance structure of the present invention;

FIG. 2 is a schematic view of the overall internal structure of the present invention;

FIG. 3 is an enlarged view of a portion of the area A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view showing the structure of the gate valve opening operation according to the present invention;

FIG. 5 is an enlarged view of a portion of the area B of FIG. 4 in accordance with the present invention;

FIG. 6 is a schematic view of the construction of the shutter portion of the present invention;

FIG. 7 is a schematic view of the interior of the shutter of the present invention;

FIG. 8 is a schematic view of the mounting structure of the override control panel of the present invention;

FIG. 9 is a dimensional relationship diagram of the gate of the present invention;

FIG. 10 is a schematic illustration of an area of the override plate of the present invention;

in the figure: 1. a valve body; 201. a left gate plate; 202. a right gate plate; 3. rotating the gate plate; 401. a valve stem; 402. a connecting bridge; 5. a seal ring; 6. a concave seal ring; 7. steel seal ring; 8. a rubber ring; 901. a pillar; 902. a support; 101. a first dust cover; 102. a second dust cover; 11. a drive nut; 12. a hand wheel; 131. a main gear; 132. a pinion gear; 141. a gear shaft; 142. a deceleration shaft; 15. a servo motor; 16. a reduction gear; 17. a speed reducer; 18. a retracting wheel; 19. a steel cord; 20. passing a control board; 21. a centering rod; 22. a slider; 23. a thrust spring; 24. a magnet; 25. an electric brush ring; 26. a centrifugal slider; 27. a return spring; 28. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 10, the present invention provides a technical solution: the utility model provides a gate valve with prevent blockking up function, includes valve body 1, and the inside of valve body 1 is provided with the flashboard, crosses control mechanism, and the flashboard carries out the shutoff to valve body 1, and the both sides of flashboard all are provided with seal assembly, and two seal assembly all install on valve body 1, and two seal assembly are used for the sealed between valve body 1 and the flashboard, cross the flow that control mechanism is used for controlling the gate valve, and the outside of valve body 1 is provided with main control mechanism, and main control mechanism controls flashboard and cross control mechanism.

Each group of sealing components comprises a concave sealing ring 6, a steel sealing ring 7 and a rubber ring 8, the concave sealing ring 6 is installed in the valve body 1, the steel sealing ring 7 is arranged in a groove of the concave sealing ring 6, the rubber ring 8 is arranged at one end of the steel sealing ring 7, the two rubber rings 8 are close to each other, the two rubber rings 8 are both contacted with the gate plate, the gate plate comprises a left gate plate 201, a right gate plate 202, a rotary gate plate 3 and a connecting bridge 402, the rotary gate plate 3 is arranged between the left gate plate 201 and the right gate plate 202 through the connecting bridge 402, one sides of the left gate plate 201 and the right gate plate 202, which are back to the rotary gate plate 3, are respectively contacted with the two rubber rings 8, the contact surfaces of the left gate plate 201 and the right gate plate 202 and the rubber rings 8 are sealing planes, the extension surfaces of the two sealing planes in the space are intersected in a V shape, the main control mechanism comprises a valve rod 401, a servo motor 15 and a support, the lower half section of the valve rod 401 is an optical axis, the upper half section of the valve rod 401 is provided with threads, the lower end of a valve rod 401 is connected with a connecting bridge 402, the optical axis part of the valve rod 401 is connected with a valve body 1 in a sliding manner, a plurality of layers of sealing rings 5 are arranged at the joint of the valve rod 401 and the valve body 1, a first dustproof cover 101 is arranged at the top of the valve body 1, the first dustproof cover 101 is connected with the valve body 1 through a support column 901, a transmission nut 11 is rotatably arranged in the first dustproof cover 101, the transmission nut 11 is matched with a thread on the valve rod 401, a hand wheel 12 is fixedly arranged above the transmission nut 11, an operator rotates the hand wheel 12 anticlockwise, the hand wheel 12 drives the transmission nut 11 to rotate to lift the valve rod 401, a flashboard is lifted, the sluice valve is completely opened, a medium flows in the valve body 1, when the sluice valve needs to be closed, the operator rotates the hand wheel 12 clockwise to lower the flashboard, because the sealing planes of a left flashboard 201 and a right flashboard 202 are not parallel, the upper width L1 of the flashboard is greater than the lower width L2, the distance between two rubber rings 8 is L3, L3 is greater than L2 and is less than L1, after the flashboard falls down completely, the rubber ring 8 of flashboard extrusion both sides makes two steel seal ring 7 take place the slope, the first half of two steel seal ring 7 extrudees two concave seal ring 6 to the outside of valve body 1, the latter half of two steel seal ring 7 extrudees two concave seal ring 6 to the inboard of valve body 1, form inseparable sealing between messenger two seal assembly and valve body 1 and the flashboard.

The servo motor 15 is mounted on the valve body 1 through a bracket 902, the bracket 902 is further provided with a second dustproof cover 102, a tooth groove is formed in the outer side of the transmission nut 11, a gear shaft 141 is connected to a motor shaft of the servo motor 15, a main gear 131 and a secondary gear 132 are mounted on the gear shaft 141, the main gear 131 is located in the first dustproof cover 101, the main gear 131 is meshed with the tooth groove, the secondary gear 132 is located in the second dustproof cover 102, the servo motor 15 drives the gear shaft 141 to rotate, the main gear 131 and the secondary gear 132 on the gear shaft 141 rotate simultaneously, the main gear 131 drives the transmission nut 11 to rotate, and lifting control is performed on the valve rod 401.

The rotary flashboard 3 is rotatably connected with a left flashboard 201 and a right flashboard 202, a magnet 24 is respectively arranged inside the left flashboard 201 and the right flashboard 202, one side of the two magnets 24 close to the rotary flashboard 3 has different polarity, a coil winding is arranged inside the rotary flashboard 3, two brush rings 25 are arranged inside the right flashboard 202, the two brush rings 25 are connected with the coil winding, the two brush rings 25 are also connected with an alternating current circuit, a plurality of slideways are arranged inside the rotary flashboard 3, a centrifugal slider 26 is slidably arranged in each slideway, a step through hole is arranged inside each centrifugal slider 26, a reset spring 27 is arranged between each centrifugal slider 26 and the rotary flashboard 3, a guide rod 28 is fixedly arranged in each slideway, each guide rod 28 is slidably connected with the centrifugal slider 26 in the same slideway, the step through hole is blocked by the guide rod 28, a water pumping groove is arranged inside the left flashboard 201, the water pumping groove is communicated with a plurality of slide ways, the inside of the connecting bridge 402 is provided with a water outlet which is communicated with the water pumping groove, the valve rod 401 is of a hollow structure, the hollow part is communicated with the water outlet, the top part of the valve rod 401 is connected with a water pump (not shown in the figure) through a hose, fluid media are still accumulated in the valve cavity after the gate valve is closed, sediments and impurities in the fluid media are deposited in the valve cavity, the two brush rings 25 are powered through an alternating current circuit and are led into a coil winding, a rotating magnetic field is generated in the coil winding and is acted by the magnetic field generated by the two magnets 24, the rotary shutter plate 3 rotates between the left shutter plate 201 and the right shutter plate 202, all the centrifugal sliders 26 extend outwards under the action of centrifugal force when the rotary shutter plate 3 rotates, the extending centrifugal sliders 26 disturb the fluid media accumulated in the valve cavity to prevent the impurities from depositing, and after the centrifugal sliders 26 extend out completely, the guide rod 28 opens the stepped through hole, the valve cavity is communicated with the water pumping groove, the water outlet and the valve rod 401 through the stepped through hole, the water pump is started, and impurities in the valve cavity are pumped out by the water pump along with accumulated fluid media.

The second dust cover 102 is also rotatably provided with a reduction gear 16, the reduction gear 16 is in meshing transmission with the pinion 132, the reduction gear 16 is connected with a reduction shaft 142, the valve body 1 is also provided with a speed reducer 17, the reduction shaft 142 is connected with an input end in the speed reducer 17, an output end of the speed reducer 17 is provided with a retractable wheel 18, the control mechanism comprises a control plate 20 and a centering rod 21, the centering rod 21 is rotatably arranged on the valve body 1, the centering rod 21 is symmetrically provided with a pair of sliders 22, a cavity is arranged in the control plate 20, sliding grooves are arranged on two sides of the control plate 20, the centering rod 21 penetrates through the cavity, a thrust spring 23 is arranged between the centering rod 21 and the cavity, the pair of sliders 22 are respectively and slidably arranged in the two sliding grooves, a guide hole is arranged in the centering rod 21, a steel cable 19 is arranged in the guide hole, one end of the steel cable 19 is connected in the cavity, the other end of the steel cable 19 is wound on the retractable wheel 18, a convex block is arranged at one end of the centering rod 21 extending out of the valve body 1, a limit ring is arranged at the position of the valve body 1 corresponding to the convex block and blocks the convex block, when fluid medium flows in the valve body 1, the fluid medium passes through the over-control plate 20, the over-control plate 20 rotates around the centering rod 21, the centering rod 21 is rotatably installed at a position above the horizontal center line of the cross section of the valve body 1, the area S1 of the over-control plate 20 at the upper part of the centering rod 21 is smaller than the area S2 at the lower part of the centering rod 21, the over-control plate 20 has flow resistance to the fluid medium, the lower part of the over-control plate 20 deflects towards the outer side of the valve body 1, when the flow rate of the fluid medium floats or suddenly increases, the resistance of the upper portion of the over-control plate 20 to the fluid medium increases, the deflection angle of the over-control plate 20 decreases, the resistance of the lower portion of the over-control plate 20 to the fluid medium gradually increases, and the pressure and the flow rate of the fluid medium after flowing through the over-control plate 20 decrease.

When the gate valve is closed, the pinion 132 drives the reduction gear 16 to rotate, the torque of the reduction gear 16 is input into the speed reducer 17 through the reduction shaft 142, the output end of the speed reducer 17 rotates slowly, the take-up and pay-off wheel 18 releases the steel cable 19 slowly, the over-control plate 20 moves downwards relative to the centering rod 21 under the action of the thrust spring 23, the area S1 above the over-control plate 20 is reduced, the area S2 below the over-control plate 20 is increased, and the resistance of the over-control plate 20 to a fluid medium is reduced; when the gate valve is opened, the winding and unwinding wheel 18 slowly winds the steel cable 19, the control board 20 moves upwards relative to the centering rod 21 under the action of the thrust spring 23, the difference between the area S1 at the upper part and the area S2 at the lower part of the control board 20 is reduced, the resistance of the control board 20 to the fluid medium is increased, the gate valve can adjust the flow and pressure of the fluid medium in real time, throttling and pressure regulating are carried out, and the load of a pipeline system is reduced.

The working principle of the invention is as follows: when the gate valve is used, an operator rotates the hand wheel 12 anticlockwise, the hand wheel 12 drives the transmission nut 11 to rotate, so that the valve rod 401 rises, the gate plate rises, the gate valve is completely opened, a medium flows in the valve body 1, and when the gate valve needs to be closed, the operator rotates the hand wheel 12 clockwise, and the gate plate descends; the servo motor 15 may also be used to drive the gear shaft 141 to rotate the main gear 131 and the sub-gear 132 on the gear shaft 141, and the main gear 131 drives the transmission nut 11 to rotate, so as to control the lifting of the valve stem 401.

During the process of flowing of the fluid medium in the valve body 1, the fluid medium passes through the over-control plate 20, the over-control plate 20 rotates around the centering rod 21, the centering rod 21 is rotatably installed at a position above the horizontal center line of the cross section of the valve body 1, the area S1 of the over-control plate 20 at the upper part of the centering rod 21 is smaller than the area S2 at the lower part of the centering rod 21, the over-control plate 20 has flow resistance to the fluid medium, the lower part of the over-control plate 20 deflects towards the outer side of the valve body 1, when the flow rate of the fluid medium floats or suddenly increases, the resistance to the fluid medium at the upper part of the over-control plate 20 increases, the deflection angle of the over-control plate 20 decreases, the resistance to the fluid medium at the lower part of the over-control plate 20 also gradually increases, and the pressure and the flow rate of the fluid medium after flowing through the over-control plate 20 both decrease.

When the gate valve is closed, the auxiliary gear 132 drives the reduction gear 16 to rotate at the same time, the torque of the reduction gear 16 is input into the speed reducer 17 through the reduction shaft 142, the output end of the speed reducer 17 rotates slowly, the take-up and pay-off wheel 18 releases the steel cable 19 slowly, the control board 20 moves downwards relative to the centering rod 21 under the action of the thrust spring 23, the area of the upper part of the control board 20 is reduced, the area of the lower part of the control board 20 is increased, and the resistance of the control board 20 to a fluid medium is reduced; when the gate valve is opened, the winding and unwinding wheel 18 slowly winds the steel cable 19, the control plate 20 moves upwards relative to the centering rod 21 under the action of the thrust spring 23, the areas of the upper part and the lower part of the control plate 20 are relatively closer, the resistance of the control plate 20 to a fluid medium is increased, and the gate valve can adjust the flow and pressure of the fluid medium in real time to perform throttling pressure regulation.

The sealing plane nonparallel of left flashboard 201 and right flashboard 202, the upper portion width L1 of flashboard is greater than flashboard lower part width L2, distance between two rubber ring 8 is L3, L3 is greater than L2 and is less than L1, after the flashboard falls down completely, the rubber ring 8 of flashboard extrusion both sides makes two steel seal ring 7 take place to incline, two concave seal ring 6 are extruded to the outside of valve body 1 to the first half of two steel seal ring 7, the latter half of two steel seal ring 7 extrudees two concave seal ring 6 to the inboard of valve body 1, form inseparable sealing between two seal assembly and valve body 1 and the flashboard.

After the gate valve is closed, fluid medium still remains in the valve cavity, sediment and impurities in the fluid medium are deposited in the valve cavity, the two brush rings 25 are powered through an alternating current circuit and are led into the coil winding, a rotating magnetic field is generated in the coil winding and is acted by the magnetic field generated by the two magnets 24, the rotary gate plate 3 rotates between the left gate plate 201 and the right gate plate 202, all the centrifugal sliders 26 extend outwards under the action of centrifugal force when the rotary gate plate 3 rotates, the extending centrifugal sliders 26 disturb the fluid medium remaining in the valve cavity to prevent the impurities from being deposited, after the centrifugal sliders 26 extend completely, the guide rod 28 opens the stepped through hole, the valve cavity is communicated with the water suction groove, the water outlet and the valve rod 401 through the stepped through hole, the water suction pump is started, and the impurities in the valve cavity are sucked out by the water suction pump along with the remaining fluid medium.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a gate valve with prevent blockking up function which characterized in that: including valve body (1), the inside of valve body (1) is provided with the flashboard, crosses control mechanism, the flashboard carries out the shutoff to valve body (1), and the both sides of flashboard all are provided with seal assembly, two seal assembly all installs on valve body (1), and two seal assembly are used for the sealing between valve body (1) and the flashboard, cross the flow that control mechanism is used for controlling the gate valve, the outside of valve body (1) is provided with main control mechanism, main control mechanism controls the flashboard and cross control mechanism.

2. The gate valve with the anti-clogging function according to claim 1, wherein: each sealing assembly comprises a concave sealing ring (6), a steel sealing ring (7) and a rubber ring (8), the concave sealing ring (6) is installed in the valve body (1), the steel sealing ring (7) is arranged in a groove of the concave sealing ring (6), the rubber ring (8) is arranged at one end of the steel sealing ring (7), the two rubber rings (8) are close to each other, and the two rubber rings (8) are both contacted with the flashboard;

the flashboard includes left flashboard (201), right flashboard (202), changes flashboard (3) and connecting bridge (402), change flashboard (3) and all set up between left flashboard (201) and right flashboard (202) with connecting bridge (402), one side of left flashboard (201) and right flashboard (202) contra-rotating flashboard (3) contacts with two rubber ring (8) respectively, and the face of left flashboard (201) and right flashboard (202) and rubber ring (8) contact is sealed plane, two the V font is personally submitted in the extension of sealed plane in the space.

3. The gate valve with the anti-clogging function according to claim 2, wherein: change flashboard (3) all rotate with left flashboard (201) and right flashboard (202) and be connected, and a magnet (24) are all installed, two to the inside of left flashboard (201) and right flashboard (202) magnet (24) are close to one side polarity of changeing flashboard (3) and are different, change the inside coil winding that is provided with of flashboard (3), the internally mounted of right flashboard (202) has two brush ring (25), two brush ring (25) are connected with the coil winding, and two brush ring (25) still are connected with alternating current circuit.

4. The gate valve with anti-clogging function according to claim 3, wherein: a plurality of slide has been seted up to the inside of commentaries on classics flashboard (3), every slidable mounting has a centrifugal slider (26), every the ladder through-hole has been seted up to centrifugal slider (26) inside, is provided with reset spring (27) between every centrifugal slider (26) and commentaries on classics flashboard (3), and it has a guide bar (28), every still fixed mounting in every slide the guide bar (28) all with centrifugal slider (26) sliding connection in the same slide, guide bar (28) carry out the shutoff to the ladder through-hole, the water extraction groove has been seted up to the inside of left side flashboard (201), the water extraction groove is linked together with a plurality of slide.

5. The gate valve with anti-clogging function according to claim 4, wherein: main control mechanism includes valve rod (401), the lower half section of valve rod (401) is the optical axis, and the first half section of valve rod (401) is seted up threadedly, and the lower extreme and the bridge of being connected (402) of valve rod (401) are connected, and the optical axis part and valve body (1) sliding connection of valve rod (401), valve rod (401) are provided with a plurality of layers of sealing washer (5) with the junction of valve body (1), the top of valve body (1) is provided with first dust cover (101), be connected through pillar (901) between first dust cover (101) and valve body (1), and drive nut (11) are installed in first dust cover (101) internal rotation, drive nut (11) cooperate with the screw thread on valve rod (401), and the top fixed mounting of drive nut (11) has hand wheel (12).

6. The gate valve with anti-clogging function according to claim 5, wherein: the main control mechanism comprises a servo motor (15) and a support (902), the servo motor (15) is installed on the valve body (1) through the support (902), a second dust cover (102) is further installed on the support (902), a tooth groove is formed in the outer side of the transmission nut (11), a gear shaft (141) is connected to a motor shaft of the servo motor (15), a main gear (131) and an auxiliary gear (132) are installed on the gear shaft (141), the main gear (131) is located in the first dust cover (101), the main gear (131) is meshed with the tooth groove, and the auxiliary gear (132) is located in the second dust cover (102).

7. The gate valve with the anti-clogging function according to claim 6, wherein: still rotate in the second dust cover (102) and install reduction gear (16), reduction gear (16) and pinion (132) meshing transmission are connected with speed reduction axle (142) on reduction gear (16), still be provided with reduction gear (17) on valve body (1), speed reduction axle (142) are connected with the input in reduction gear (17), receive and release wheel (18) are installed to the output of reduction gear (17).

8. The gate valve with anti-clogging function according to claim 7, wherein: the over-control mechanism comprises a over-control plate (20) and a centering rod (21), the centering rod (21) is rotatably installed on the valve body (1), a pair of sliding blocks (22) are symmetrically arranged on the centering rod (21), a cavity is formed in the over-control plate (20), sliding grooves are formed in two sides of the over-control plate (20), the centering rod (21) penetrates through the cavity, a thrust spring (23) is arranged between the centering rod (21) and the cavity, the pair of sliding blocks (22) are respectively and slidably installed in the two sliding grooves, a guide hole is formed in the centering rod (21), a steel cable (19) is arranged in the guide hole, one end of the steel cable (19) is connected into the cavity, the other end of the steel cable (19) is wound on a take-up and pay-off wheel (18), a convex block is arranged at one end of the centering rod (21) extending out of the valve body (1), and a limit ring is arranged at the position, corresponding to the convex block, of the valve body (1), the limit ring blocks the bump.

9. The gate valve with anti-clogging function according to claim 8, wherein: the water outlet is formed in the connecting bridge (402) and is communicated with the water pumping groove, the valve rod (401) is of a hollow structure, the hollow part is communicated with the water outlet, and the top of the valve rod (401) is connected with the water pumping pump through a hose.