CN114719038B - Gate valve with anti-blocking function - Google Patents
Gate valve with anti-blocking function Download PDFInfo
- Publication number
- CN114719038B CN114719038B CN202210426761.8A CN202210426761A CN114719038B CN 114719038 B CN114719038 B CN 114719038B CN 202210426761 A CN202210426761 A CN 202210426761A CN 114719038 B CN114719038 B CN 114719038B
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- China
- Prior art keywords
- flashboard
- valve
- valve body
- rod
- sealing
- Prior art date
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 230000009467 reduction Effects 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 47
- 239000011797 cavity material Substances 0.000 description 27
- 230000009471 action Effects 0.000 description 15
- 239000012535 impurity Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/02—Arrangements using fluid issuing from valve members or seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
- F16K27/047—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with wedge-shaped obturating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
- F16K3/0236—Packings the packing being of a non-resilient material, e.g. ceramic, metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/05—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Sliding Valves (AREA)
- Mechanically-Actuated Valves (AREA)
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 in the valve body, the flashboard is used for plugging the valve body, sealing assemblies are arranged on two sides of the flashboard, the two sealing assemblies are arranged on the valve body, the two sealing assemblies 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 is used for controlling the flashboard and the over-control mechanism.
Description
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 the gate plate, the moving direction of the gate plate is vertical to the fluid direction, the gate valve is very common in the industrial field, because the medium flows in a straight line, the flow resistance is small, the gate valve is labor-saving when opened and closed, and because the closing time is long, the water hammer phenomenon can be avoided, and the gate valve has a certain protection effect on a pipeline system.
However, the gate valve has the advantages and disadvantages of coexistence, the manual closing of the gate valve is too time-consuming, abrasion exists between sealing surfaces of the valve seat and the valve core, the sealing performance of the gate valve is reduced due to long-term abrasion, the gate valve can only be fully opened and fully closed, the gate valve cannot have the functions of a regulating valve and a throttle valve, the requirement on the processing capacity of a pipeline system is high, the gate valve is widely applied to a sewage treatment system due to the simple process of the gate valve, but the water trapping problem of the gate valve often causes substances to accumulate in a valve cavity, the valve cavity is blocked, and the opening and closing mechanism of the valve body is blocked and fails, so that 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 art.
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 flashboard, excessively controls the mechanism, the flashboard is 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 sealing between valve body and the flashboard, the outside of valve body is provided with master control mechanism for controlling the flow of gate valve, master control mechanism controls flashboard and excessively controls the mechanism.
Further, each sealing assembly comprises a concave sealing ring, a steel sealing ring and rubber rings, wherein the concave sealing rings are installed in the valve body, the steel sealing rings are arranged in grooves of the concave sealing rings, the rubber rings are arranged at one ends of the steel sealing rings, the two rubber rings are close to each other, and the two rubber rings are in contact with the flashboard;
the gate plate comprises a left gate plate, a right gate plate, a gate plate and a connecting bridge, wherein the gate plate is arranged between the left gate plate and the right gate plate through the connecting bridge, one sides of the left gate plate and the right gate plate, which are opposite to the gate plate, are respectively contacted with two rubber rings, the surfaces of the left gate plate and the right gate plate, which are contacted with the rubber rings, are sealing planes, the two sealing planes are intersected in a V shape in a space, an operator rotates a hand wheel anticlockwise, the hand wheel drives a transmission nut to rotate so as to enable a valve rod to ascend, the gate plate is lifted, the gate valve is completely opened, a medium flows in the valve body, when the gate valve needs to be closed, the operator rotates a hand wheel clockwise, the gate plate descends, and as the sealing planes of the left gate plate and the right gate plate are not parallel, the upper width L1 of the gate plate is larger than the lower width L2 of the gate plate, the distance between the two rubber rings is L3, and is smaller than L1, after the gate plate completely descends, the rubber rings on two sides of the gate plate are extruded, the two steel sealing rings incline, the upper half parts of the two steel sealing rings are used for extruding the two concave sealing rings to the outer sides of the two sealing rings, and the two concave sealing rings are tightly sealed to the inner sides of the valve body, and the sealing assembly is formed;
compared with continuous friction between the parallel flashboard and the valve seat, the friction time generated between the flashboard and the sealing assembly is short, the abrasion position is concentrated, and the rigid sealing ring inclines to compensate the abrasion position along with closing of the flashboard, so that the sealing performance of the gate valve is greatly improved.
Further, the rotor plate is rotationally connected with the left rotor plate and the right rotor plate, a magnet is arranged in the left rotor plate and the right rotor plate, polarities of one sides of the magnets, which are close to the rotor plate, are different, coil windings are arranged in the rotor plate, two brush rings are arranged in the right rotor plate, the two brush rings are connected with the coil windings, the two brush rings are further connected with an alternating current circuit, after the gate valve is closed, fluid media still remain in the valve cavity, sediment and impurities in the fluid media are deposited in the valve cavity, the alternating current circuit supplies power to the two brush rings, the coil windings are fed with electricity, a rotating magnetic field is generated in the coil windings, and the rotor plate rotates between the left rotor plate and the right rotor plate under the action of the magnetic field generated by the two magnets.
Further, a plurality of slide ways are arranged in the slide ways, a centrifugal slide block is slidably arranged in each slide way, a stepped through hole is formed in each centrifugal slide block, a reset spring is arranged between each centrifugal slide block and the slide way, a guide rod is fixedly arranged in each slide way, each guide rod is slidably connected with the centrifugal slide block in the same slide way, the guide rods plug the stepped through holes, a water pumping groove is formed in the left slide way, the water pumping groove is communicated with the slide ways, all the centrifugal slide blocks extend outwards under the action of centrifugal force when the slide way rotates, the extending centrifugal slide blocks disturb fluid medium accumulated in the valve cavity to prevent impurity deposition, after the centrifugal slide blocks extend completely, the stepped through holes are opened by the guide rods, the valve cavity is then communicated with the water pumping groove, the water outlet and the valve rod, impurities in the valve cavity are pumped out along with the accumulated fluid medium, the water problem of the valve cavity is solved, the accumulation of the stepped through holes is prevented, the accumulated impurities in the valve cavity are blocked by the fluid medium, and the opening and closing phenomenon of the valve body is relieved to a great extent.
Further, the master control mechanism includes the valve rod, the lower half section of valve rod is the optical axis, and the screw thread is seted up to the upper half section of valve rod, and the lower extreme and the 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, first dust cover inside rotation installs drive nut, the screw thread on drive nut and the valve rod cooperatees, and drive nut's top fixed mounting has the hand wheel.
Further, the master control mechanism comprises a servo motor and a support, the servo motor is mounted on the valve body through the support, a second dust cover is further mounted on the support, a tooth slot is formed in the outer side of the transmission nut, a gear shaft is connected to a motor shaft of the servo motor, a main gear and a pinion are mounted on the gear shaft, the main gear is located in the first dust cover, the main gear is meshed with the tooth slot, the pinion is located in the second dust cover, the servo motor drives the gear shaft to rotate, and the main gear and the pinion on the gear shaft rotate simultaneously, and the main gear drives the transmission nut to rotate so as to achieve the functions of manual and automatic opening and closing of the gate valve.
Further, the second dust cover is further internally provided with a reduction gear in a rotating mode, the reduction gear is in meshed transmission with the pinion, the reduction gear is connected with a reduction shaft, the valve body is further provided with a speed reducer, the reduction shaft is connected with an input end in the speed reducer, an output end of the speed reducer is provided with a winding and unwinding wheel, the pinion drives the reduction gear to rotate in the opening process of the gate valve, torque of the reduction gear is input into the speed reducer through the reduction shaft, and the output end of the speed reducer slowly rotates to drive the winding and unwinding wheel to wind or unwind a steel cable.
Further, the over-control mechanism comprises an over-control plate and a centering rod, the centering rod is rotatably arranged on the valve body, a pair of sliding blocks are 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 slidably arranged in the two sliding grooves respectively, a guide hole is formed in the centering rod, a steel rope is arranged in the guide hole, one end of the steel rope is connected in the cavity, the other end of the steel rope is wound on the winding wheel, a lug is arranged at one end of the centering rod extending out of the valve body, a limit ring is arranged at the position of the valve body corresponding to the lug, the limit ring blocks the lug, when a 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 arranged at the position of the horizontal center line of the valve body, the area S1 of the upper part of the over-control plate is smaller than the area S2 of the lower part of the centering rod, when the fluid medium flows through the lower plate, the fluid medium flows through the lower plate or the lower plate and flows towards the lower side of the valve body, and the medium flows slowly, and the pressure of the medium flows towards the lower plate is reduced, and the upper side of the medium is reduced.
When the gate valve is closed, the winding and unwinding wheel pair steel cable is slowly loosened, the overcontrol plate moves downwards relative to the centering rod under the action of the thrust spring, the area S1 of the upper part of the overcontrol plate is reduced, the area S2 of the lower part of the overcontrol plate is increased, and the resistance of the overcontrol plate to the fluid medium is reduced; when the gate valve is opened, the winding and unwinding wheel pair steel cable is slowly wound, the over-control plate moves upwards relative to the centering rod under the action of the thrust spring, the difference between the area S1 on the upper part of the over-control plate and the area S2 on the lower part of the over-control plate is reduced, the resistance of the over-control plate to the fluid medium is increased, the gate valve can adjust the flow and the pressure of the fluid medium in real time, throttling and pressure regulation are carried out, and the load of a pipeline system is reduced.
Further, a water outlet is formed in the connecting bridge, the water outlet 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 the water pumping pump through a hose.
Compared with the prior art, the invention has the following beneficial effects:
1. two sealing planes of the flashboard are not parallel, the upper part of the flashboard is wider than the lower part, the flashboard is completely closed, then rubber rings on two sides are extruded, two steel seal rings incline, the two steel seal rings extrude the two concave seal rings to the valve body, so that tight sealing is formed between the two sealing components and the valve body and the flashboard, compared with continuous friction between the parallel flashboard and the valve seat, the friction time generated between the flashboard and the sealing components is short, the abrasion positions are concentrated, the steel seal rings can compensate the abrasion positions after inclining along with the flashboard, and the sealing performance of the gate valve is greatly improved.
2. Through setting up coil winding circuit in the flashboard, make the flashboard rotatory between left flashboard and right flashboard, centrifugal slider outwards stretches out under the effect of centrifugal force, disturb the fluidic medium of entrapment in the valve pocket, prevent impurity deposit, start the suction pump and take out the impurity in the valve pocket and the fluidic medium of entrapment together, not only can wash away the valve pocket inside, and solved the water trapping problem of valve pocket, in order to prevent impurity accumulation in the fluidic medium, cause the jam to the valve pocket, the dead malfunctioning phenomenon of card appears in the valve body opening and closing mechanism has been alleviated to a great extent.
3. Through setting up the accuse board in the valve body, there is flow resistance to the fluid medium through the accuse board, the lower part of the accuse board deflects towards the outside of valve body, when the flow of fluid medium has the float or suddenly increased, the resistance of the upper portion of the accuse board to the fluid medium increases thereupon, the angle of the accuse board deflection reduces, the resistance of the lower part of the accuse board to the fluid medium also slowly becomes big, pressure and flow all can reduce after the fluid medium flows through the accuse board, make real-time adjustment to fluid medium flow and pressure's change, carry out throttle pressure regulating, reduce piping system's load.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain 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 diagram 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 of the gate valve opening operation of the present invention;
FIG. 5 is an enlarged partial view of region B of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic structural view of a shutter portion of the present invention;
FIG. 7 is a schematic view of the structure of the inside of the shutter of the present invention;
FIG. 8 is a schematic view of the mounting structure of the override plate of the present invention;
FIG. 9 is a schematic diagram of the relationship between the dimensions of the gate plates according to the present invention;
FIG. 10 is a schematic view of the area of an override plate of the present invention;
in the figure: 1. a valve body; 201. a left flashboard; 202. a right flashboard; 3. a rotor plate; 401. a valve stem; 402. a connecting bridge; 5. a seal ring; 6. a concave seal ring; 7. a steel seal ring; 8. a rubber ring; 901. a support post; 902. a bracket; 101. a first dust cap; 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 reduction shaft; 15. a servo motor; 16. a reduction gear; 17. a speed reducer; 18. a retractable wheel; 19. a wire rope; 20. a control board; 21. a centering rod; 22. a slide block; 23. a thrust spring; 24. a magnet; 25. a brush ring; 26. centrifuging the sliding block; 27. a return spring; 28. a guide rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 10, the present invention provides the following technical solutions: the utility model provides a gate valve with prevent blockking up function, includes valve body 1, and valve body 1's inside is provided with the flashboard, crosses accuse mechanism, and the flashboard is shutoff to valve body 1, and the both sides of flashboard all are provided with seal assembly, and two seal assembly are all installed on valve body 1, and two seal assembly are used for sealing between valve body 1 and the flashboard, and the outside of accuse mechanism is used for controlling the flow of gate valve, and valve body 1 is provided with master control mechanism, and master control mechanism controls flashboard and crosses accuse 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 arranged 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 contacted with the flashboard, the flashboard comprises a left flashboard 201, a right flashboard 202, a flashboard 3 and a connecting bridge 402, the flashboard 3 is arranged between the left flashboard 201 and the right flashboard 202 by the connecting bridge 402, one side of the left flashboard 201 and the right flashboard 202 opposite to the flashboard 3 is contacted with the two rubber rings 8 respectively, the contact surfaces of the left flashboard 201 and the right flashboard 202 and the rubber ring 8 are sealing planes, the extension surfaces of the two sealing planes in space are intersected in a V shape, the main control mechanism comprises a valve rod 401, a servo motor 15 and a bracket 902, 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 the valve rod 401 is connected with a connecting bridge 402, the optical axis part of the valve rod 401 is in sliding connection with the valve body 1, a plurality of layers of sealing rings 5 are arranged at the joint of the valve rod 401 and the valve body 1, the top of the valve body 1 is provided with a first dust cover 101, the first dust cover 101 is connected with the valve body 1 through a support column 901, a transmission nut 11 is rotatably arranged in the first dust cover 101, the transmission nut 11 is matched with the threads 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 so as to enable the valve rod 401 to ascend, a gate plate rises, a gate valve is completely opened, a medium flows in the valve body 1, when the gate valve needs to be closed, the operator rotates the hand wheel 12 clockwise, the gate plate descends, and the sealing planes of the left gate plate 201 and the right gate plate 202 are not parallel, the upper width L1 of the flashboard is larger than the lower width L2 of the flashboard, the distance between the two rubber rings 8 is L3, the L3 is larger than L2 and smaller than L1, when the flashboard falls down completely, the rubber rings 8 on two sides of the flashboard are extruded to enable the two steel seal rings 7 to incline, the upper half parts of the two steel seal rings 7 extrude the two concave seal rings 6 to the outer side of the valve body 1, and the lower half parts of the two steel seal rings 7 extrude the two concave seal rings 6 to the inner side of the valve body 1, so that tight sealing is formed between the two sealing assemblies and the valve body 1 and between the two steel seal rings.
The servo motor 15 is installed on the valve body 1 through the bracket 902, the bracket 902 is also provided with the second dust cover 102, the outer side of the transmission nut 11 is provided with a tooth slot, a motor shaft of the servo motor 15 is connected with a gear shaft 141, the gear shaft 141 is provided with a main gear 131 and a pinion 132, the main gear 131 is positioned in the first dust cover 101, the main gear 131 is meshed with the tooth slot, the pinion 132 is positioned in the second dust cover 102, the servo motor 15 drives the gear shaft 141 to rotate, the main gear 131 and the pinion 132 on the gear shaft 141 simultaneously rotate, and the main gear 131 drives the transmission nut 11 to rotate, so that the valve rod 401 is subjected to lifting control.
The rotary flashboard 3 is rotationally connected with the left flashboard 201 and the right flashboard 202, a magnet 24 is arranged in the left flashboard 201 and the right flashboard 202, polarities of one sides of the two magnets 24 close to the rotary flashboard 3 are different, coil windings are arranged in the rotary flashboard 3, two brush rings 25 are arranged in the right flashboard 202, the two brush rings 25 are connected with the coil windings, the two brush rings 25 are also connected with an alternating current circuit, a plurality of slide ways are arranged in the rotary flashboard 3, a centrifugal slide block 26 is slidably arranged in each slide way, a stepped through hole is arranged in each centrifugal slide block 26, a reset spring 27 is arranged between each centrifugal slide block 26 and the rotary flashboard 3, a guide rod 28 is fixedly arranged in each slide way, each guide rod 28 is slidably connected with the centrifugal slide block 26 in the same slide way, the guide rod 28 is used for plugging the stepped through hole, the left flashboard 201 is internally provided with a water pumping groove which 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 of the valve rod 401 is connected with a water pump (not shown in the figure) through a hose, after the gate valve is closed, fluid medium is still reserved in the valve cavity, sediment and impurities in the fluid medium are deposited in the valve cavity, the two brush rings 25 are supplied with power through an alternating current circuit, the coil windings are led in, a rotating magnetic field is generated in the coil windings, under the action of the magnetic field generated by the two magnets 24, the flashboard 3 rotates between the left flashboard 201 and the right flashboard 202, all centrifugal sliders 26 outwards extend under the action of centrifugal force when the flashboard 3 rotates, the extended centrifugal sliders 26 disturb the fluid medium reserved in the valve cavity, after the centrifugal slide block 26 is completely extended, 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 pumping pump is started, and impurities in the valve cavity are pumped out together with the accumulated fluid medium by the water pumping pump.
The second dust cover 102 is also rotatably provided with a reduction gear 16, the reduction gear 16 is meshed with a pinion 132 for transmission, 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, an over-control mechanism comprises an over-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 sliding blocks 22, 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 slidably arranged 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 in the cavity, the other end of the steel cable 19 is wound on the winding and unwinding wheel 18, one end of the centering rod 21 extending out of the valve body 1 is provided with a bump, the position of the valve body 1 corresponding to the bump is provided with a limiting ring, the limiting ring blocks the bump, when fluid medium flows in the valve body 1, the fluid medium can pass through the overcontrol plate 20, the overcontrol plate 20 rotates around the centering rod 21, the centering rod 21 is rotatably arranged at a position of the upper part of the horizontal center line of the section of the valve body 1, the area S1 of the overcontrol plate 20 positioned at the upper part of the centering rod 21 is smaller than the area S2 positioned at the lower part of the centering rod 21, the overcontrol plate 20 has flowing resistance to the fluid medium, the lower part of the overcontrol plate 20 deflects towards the outer side of the valve body 1, when the flow of the fluid medium floats or suddenly increases, the resistance of the upper part of the overcontrol plate 20 to the fluid medium increases, the deflection angle of the overcontrol plate 20 decreases, the resistance of the lower part of the overcontrol plate 20 to the fluid medium slowly increases, the pressure and flow rate of the fluid medium are reduced after flowing through the flow control plate 20.
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 reduction gear 17 through the reduction shaft 142, the output end of the reduction gear 17 slowly rotates, the winding and unwinding wheel 18 slowly loosens the steel cable 19, the overcontrol plate 20 moves downwards relative to the centering rod 21 under the action of the thrust spring 23, the area S1 at the upper part of the overcontrol plate 20 is reduced, the area S2 at the lower part is increased, and the resistance of the overcontrol plate 20 to a fluid medium is reduced; when the gate valve is opened, the winding and unwinding wheel 18 winds the steel cable 19 slowly, the overcontrol plate 20 moves upwards relative to the centering rod 21 under the action of the thrust spring 23, the difference between the upper area S1 and the lower area S2 of the overcontrol plate 20 is reduced, the resistance of the overcontrol plate 20 to the fluid medium is increased, the gate valve can adjust the flow rate and the pressure of the fluid medium in real time, the throttling and the pressure regulation 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 can also be used for driving the gear shaft 141 to rotate the main gear 131 and the auxiliary gear 132 on the gear shaft 141 simultaneously, and the main gear 131 drives the transmission nut 11 to rotate so as to control the lifting of the valve rod 401.
In the process of flowing 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 rotates to be installed at a position on the horizontal central line of the section of the valve body 1, the area S1 of the over-control plate 20 on the upper part of the centering rod 21 is smaller than the area S2 of the lower part of the centering rod 21, the flow resistance of the over-control plate 20 on the fluid medium exists, 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 part of the over-control plate 20 on the fluid medium increases, the deflection angle of the over-control plate 20 decreases, the resistance of the lower part of the over-control plate 20 on the fluid medium also slowly 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 at the same time, the torque of the reduction gear 16 is input into the reduction gear 17 through the reduction shaft 142, the output end of the reduction gear 17 slowly rotates, the winding and unwinding wheel 18 slowly loosens the steel cable 19, the overcontrol plate 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 overcontrol plate 20 is reduced, the area of the lower part is increased, and the resistance of the overcontrol plate 20 to a fluid medium is reduced; when the gate valve is opened, the winding and unwinding wheel 18 winds the steel cable 19 slowly, the overcontrol 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 overcontrol plate 20 are relatively closer, the resistance of the overcontrol plate 20 to the fluid medium is increased, the gate valve can adjust the flow rate and the pressure of the fluid medium in real time, and the throttling and pressure adjusting are carried out.
The sealing planes of the left flashboard 201 and the right flashboard 202 are not parallel, the upper width L1 of the flashboard is larger than the lower width L2 of the flashboard, the distance between the two rubber rings 8 is L3, L3 is larger than L2 and smaller than L1, when the flashboard falls down completely, the rubber rings 8 on two sides of the flashboard are extruded to enable the two steel seal rings 7 to incline, the upper half parts of the two steel seal rings 7 extrude the two concave seal rings 6 to the outer side of the valve body 1, the lower half parts of the two steel seal rings 7 extrude the two concave seal rings 6 to the inner side of the valve body 1, and tight sealing is formed between the two sealing assemblies and the 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, power is supplied to the two brush rings 25 through an alternating current circuit, the two brush rings are introduced into the coil windings, a rotating magnetic field is generated in the coil windings, under the action of the magnetic field generated by the two magnets 24, the rotating gate plate 3 rotates between the left gate plate 201 and the right gate plate 202, all centrifugal slide blocks 26 extend outwards under the action of centrifugal force when the rotating gate plate 3 rotates, the extending centrifugal slide blocks 26 disturb the fluid medium remaining in the valve cavity, impurities are prevented from being deposited, after the centrifugal slide blocks 26 extend completely, the guide rod 28 opens a 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 pumping pump is started, and the impurities in the valve cavity are pumped out together with the fluid medium.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. Gate valve with prevent blockking up function, its characterized in that: the valve comprises a valve body (1), wherein a flashboard and an over-control mechanism are arranged in the valve body (1), the flashboard is used for plugging the valve body (1), sealing assemblies are arranged on two sides of the flashboard, the two sealing assemblies are arranged on the valve body (1) and are used for sealing between the valve body (1) and the flashboard, the over-control mechanism is used for controlling the flow of a gate valve, a main control mechanism is arranged outside the valve body (1), and the main control mechanism is used for controlling the flashboard and the over-control mechanism;
each sealing assembly comprises a concave sealing ring (6), a steel sealing ring (7) and rubber rings (8), wherein 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 rings (8) are 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 in contact with the flashboard;
the flashboard comprises a left flashboard (201), a right flashboard (202), a rotating flashboard (3) and a connecting bridge (402), wherein the rotating flashboard (3) is arranged between the left flashboard (201) and the right flashboard (202) through the connecting bridge (402), one sides of the left flashboard (201) and the right flashboard (202) opposite to the rotating flashboard (3) are respectively contacted with two rubber rings (8), the contact surfaces of the left flashboard (201) and the right flashboard (202) and the rubber rings (8) are sealing planes, and the extension surfaces of the two sealing planes in space are intersected in a V shape;
the rotary flashboard (3) is rotationally connected with the left flashboard (201) and the right flashboard (202), a magnet (24) is arranged in the left flashboard (201) and the right flashboard (202), polarities of one sides of the magnets (24) close to the rotary flashboard (3) are different, coil windings are arranged in the rotary flashboard (3), two electric brush rings (25) are arranged in the right flashboard (202), the two electric brush rings (25) are connected with the coil windings, and the two electric brush rings (25) are further connected with an alternating current circuit.
2. The gate valve with anti-blocking function according to claim 1, wherein: a plurality of slide ways are arranged in the slide ways of the rotary flashboard (3), a centrifugal slide block (26) is slidably arranged in each slide way, a stepped through hole is formed in each centrifugal slide block (26), a reset spring (27) is arranged between each centrifugal slide block (26) and the rotary flashboard (3), a guide rod (28) is fixedly arranged in each slide way, each guide rod (28) is slidably connected with the centrifugal slide block (26) in the same slide way, the guide rod (28) is used for plugging the stepped through hole, and a water pumping groove is formed in the left flashboard (201) and is communicated with the plurality of slide ways.
3. A gate valve with anti-blocking function according to claim 2, characterized in that: the main control mechanism comprises a valve rod (401), 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 the valve rod (401) is connected with a connecting bridge (402), the optical axis of the valve rod (401) is in sliding connection with the valve body (1), a plurality of layers of sealing rings (5) are arranged at the connecting position of the valve rod (401) and the valve body (1), a first dust cover (101) is arranged at the top of the valve body (1), the first dust cover (101) is connected with the valve body (1) through a support column (901), a transmission nut (11) is rotatably arranged in the first dust cover (101), the transmission nut (11) is matched with the threads on the valve rod (401), and a hand wheel (12) is fixedly arranged above the transmission nut (11).
4. A gate valve with anti-blocking function according to claim 3, characterized in that: the main control mechanism comprises a servo motor (15) and a support (902), the servo motor (15) is arranged on the valve body (1) through the support (902), a second dust cover (102) is further arranged on the support (902), tooth grooves are 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 pinion (132) are arranged on the gear shaft (141), the main gear (131) is arranged in the first dust cover (101), the main gear (131) is meshed with the tooth grooves, and the pinion (132) is arranged in the second dust cover (102).
5. The gate valve with anti-blocking function according to claim 4, wherein: the second dust cover (102) is further rotatably provided with a reduction gear (16), the reduction gear (16) is in meshed transmission with the pinion (132), the reduction gear (16) is connected with a reduction shaft (142), the valve body (1) is further provided with a speed reducer (17), the reduction shaft (142) is connected with an input end in the speed reducer (17), and an output end of the speed reducer (17) is provided with a retraction wheel (18).
6. The gate valve with anti-blocking function according to claim 5, wherein: the automatic control device is characterized in that the automatic control mechanism comprises an automatic control board (20) and a centering rod (21), the centering rod (21) is rotatably arranged 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 automatic control board (20), sliding grooves are formed in two sides of the automatic control board (20), the centering rod (21) penetrates through the cavity, a thrust spring (23) is arranged between the centering rod (21) and the cavity, the sliding blocks (22) are respectively and slidably arranged 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 in the cavity, the other end of the steel cable (19) is wound on the winding and unwinding wheel (18), a lug is arranged at one end of the centering rod (21) extending out of the valve body (1), and a limiting ring is arranged at the position of the valve body (1) corresponding to the lug.
7. The gate valve with anti-blocking function according to claim 6, wherein: the inside of connecting bridge (402) has seted up the delivery port, delivery port is linked together with the water pumping groove, valve rod (401) are hollow structure, and hollow part is linked together with the delivery port, and the top of valve rod (401) is connected with the suction pump through the hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426761.8A CN114719038B (en) | 2022-04-21 | 2022-04-21 | Gate valve with anti-blocking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426761.8A CN114719038B (en) | 2022-04-21 | 2022-04-21 | Gate valve with anti-blocking function |
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| Publication Number | Publication Date |
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| CN114719038A CN114719038A (en) | 2022-07-08 |
| CN114719038B true CN114719038B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210426761.8A Active CN114719038B (en) | 2022-04-21 | 2022-04-21 | Gate valve with anti-blocking function |
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| CN (1) | CN114719038B (en) |
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| GB671546A (en) * | 1949-12-05 | 1952-05-07 | Teddington Controls Ltd | Improvements in gate-type shut-off valves |
| GB762830A (en) * | 1954-11-15 | 1956-12-05 | Bryan Donkin Co Ltd | Improvements in or relating to gate valves |
| GB854311A (en) * | 1955-11-30 | 1960-11-16 | Glenfield & Kennedy Ltd | Improvements in or relating to sluice valves |
| GB1354041A (en) * | 1972-01-08 | 1974-06-05 | Ramazanov R A O Veliev T K | Gate valve |
| CN2483567Y (en) * | 2001-05-31 | 2002-03-27 | 曲树蓁 | Gate valve |
| CN103883751A (en) * | 2014-04-09 | 2014-06-25 | 金首广 | Three-linkage expansion-type gate valve |
| CN104235411A (en) * | 2014-10-13 | 2014-12-24 | 凯阀科技(厦门)有限公司 | Gate valve with rubber bushings |
| CN204083437U (en) * | 2014-09-15 | 2015-01-07 | 浙江求精泵阀制造有限公司 | Electric Actuated Wedge Gate Valves |
| CN208431402U (en) * | 2018-05-31 | 2019-01-25 | 凯阀控股集团有限公司 | A kind of wear-resistant sluice valve |
| CN209245303U (en) * | 2018-12-11 | 2019-08-13 | 天津市滨海华义阀门有限公司 | A kind of gate valve having internal dredging function |
-
2022
- 2022-04-21 CN CN202210426761.8A patent/CN114719038B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB671546A (en) * | 1949-12-05 | 1952-05-07 | Teddington Controls Ltd | Improvements in gate-type shut-off valves |
| GB762830A (en) * | 1954-11-15 | 1956-12-05 | Bryan Donkin Co Ltd | Improvements in or relating to gate valves |
| GB854311A (en) * | 1955-11-30 | 1960-11-16 | Glenfield & Kennedy Ltd | Improvements in or relating to sluice valves |
| GB1354041A (en) * | 1972-01-08 | 1974-06-05 | Ramazanov R A O Veliev T K | Gate valve |
| CN2483567Y (en) * | 2001-05-31 | 2002-03-27 | 曲树蓁 | Gate valve |
| CN103883751A (en) * | 2014-04-09 | 2014-06-25 | 金首广 | Three-linkage expansion-type gate valve |
| CN204083437U (en) * | 2014-09-15 | 2015-01-07 | 浙江求精泵阀制造有限公司 | Electric Actuated Wedge Gate Valves |
| CN104235411A (en) * | 2014-10-13 | 2014-12-24 | 凯阀科技(厦门)有限公司 | Gate valve with rubber bushings |
| CN208431402U (en) * | 2018-05-31 | 2019-01-25 | 凯阀控股集团有限公司 | A kind of wear-resistant sluice valve |
| CN209245303U (en) * | 2018-12-11 | 2019-08-13 | 天津市滨海华义阀门有限公司 | A kind of gate valve having internal dredging function |
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|---|---|
| CN114719038A (en) | 2022-07-08 |
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