WO2019019127A1 - Robinet-vanne plat à faible couple combiné - Google Patents

Robinet-vanne plat à faible couple combiné Download PDF

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Publication number
WO2019019127A1
WO2019019127A1 PCT/CN2017/094810 CN2017094810W WO2019019127A1 WO 2019019127 A1 WO2019019127 A1 WO 2019019127A1 CN 2017094810 W CN2017094810 W CN 2017094810W WO 2019019127 A1 WO2019019127 A1 WO 2019019127A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve plate
torque
chamber
plate
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Application number
PCT/CN2017/094810
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English (en)
Chinese (zh)
Inventor
周传本
黄国成
Original Assignee
江苏政轩石油机械股份有限公司
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Priority to PCT/CN2017/094810 priority Critical patent/WO2019019127A1/fr
Publication of WO2019019127A1 publication Critical patent/WO2019019127A1/fr

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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
    • 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

Definitions

  • the invention relates to the technical field of slab gate valves, in particular to a composite low torque slab gate valve used in the petroleum industry.
  • the valve is a control component in the fluid delivery system, with functions such as cut-off, regulation, diversion, anti-backflow, pressure regulation, split or overflow relief; valves for fluid control systems, from the simplest shut-off valves to extremely complex
  • the various valves used in the automatic control system are quite diverse in variety and specifications.
  • the seat of the slab gate valve is tightly attached to the ram under the action of the spring preload and the pressure difference caused by the medium pressure difference to ensure the seal.
  • the upper and lower valve seats are always close to the ram, causing the friction between the ram and the valve seat to be very large when the valve is opened.
  • the torque is very heavy. Only the hand wheel diameter or actuator specifications are increased to solve the problem.
  • the sealing ring is severely worn due to the opening pressure, and the valve seal is invalid.
  • the slab gate valve technology has been developed and the use effect has been recognized.
  • the slab gate valves used at home and abroad are both a ram and two valve seats distributed on both sides of the ram. Through the control of the ram, the full Open or fully closed, however, the gate valve is controlled by a single block.
  • the torque is usually very large, the internal structure is complicated, the parts are many, and the sealing effect at the time of full closing is not optimistic. Under normal circumstances, the torque of the small-diameter low-pressure valve is not too large. Under normal circumstances, the movement of the gate can be made by the rotation of the hand wheel to realize the opening and closing of the gate valve.
  • the manual opening torque of the large-diameter high-pressure valve is very large, and the movement of the ram is difficult to realize only by the rotation of the hand wheel, and with the progress of the pipeline technology, the pressure of the pipeline design is getting higher and higher, and the pipeline diameter is getting larger and larger.
  • the slab gate valve is in the form of a floating valve seat, under the action of the medium pressure, the ram plate is close to the sealing surface of the downstream valve seat.
  • the operating force of the ram under the full pressure difference is the medium positive pressure multiplied by the sealing surface friction coefficient, although the sealing surface is selected.
  • the present invention has been made in view of the problems of the prior art composite low torque slab gate valve described above.
  • the object of the present invention is to provide a composite low-torque slab gate valve, which greatly reduces the manufacturing cost and greatly reduces the labor intensity of the operator and improves the production efficiency.
  • a composite low-torque slab gate valve including a valve body, a valve chamber and a first valve seat, wherein the valve body is provided with a medium passage for supplying medium in the left-right direction And a valve chamber in the up and down direction, the first valve seat is disposed in the valve cavity and communicates with the medium passage at both ends thereof, and the valve chamber is sequentially divided into an upper chamber, a middle chamber and a lower chamber, And the middle cavity is in communication with the medium passage, and further comprising: a first valve plate partially inserted into the first valve seat to cut off or communicate with the medium passage; and a second valve plate disposed at the The first valve plate includes a second intercepting end and a second transparent end, which are capable of cutting or conducting a flow guiding channel disposed in the left and right direction of the first valve plate, the guiding channel and the The medium passages are in communication; and the second valve seat communicates with the flow guiding passages at both ends thereof, and
  • the first valve plate further includes a first cut end and a first through end, the first cut end being a solid portion, a sliding groove is disposed on the upper and lower sides, the second valve plate is slid in the sliding groove, and the flow guiding channel is cut off, the first transparent end is a transparent portion, and the medium passage can be Corresponding connection.
  • a preferred embodiment of the composite low-torque slab gate valve of the present invention wherein: the second valve plate has the same structure as the first valve plate, and the second truncated end is a solid portion, a truncation
  • the flow guiding channel is described, and the second transparent end is a transparent portion, and can communicate with the guiding channel.
  • a preferred embodiment of the composite low-torque slab gate valve according to the present invention further comprising: a lifting member on which a finite protrusion is disposed, and the lifting member is divided into an upper end and a lower end by the limiting protrusion, The lower end is connected to the second valve plate, the inner diameter of the lower end is smaller than the inner diameter of the upper end, and a certain gap is formed between the lower end and the sliding groove.
  • the first intercepting end further includes a limiting block and a contact member, and the limiting block covers the top end of the sliding slot.
  • the top end of the first valve plate is connected, and the abutting member is disposed at a bottom end of the gap and is connected to a top end of the second valve plate.
  • the method further includes a valve cover that is capped at the top end of the valve chamber and connected to the valve body.
  • a preferred embodiment of the composite low-torque slab gate valve of the present invention wherein: the bonnet is further provided with a finite position port, and the limiting port can be limited with the limiting protrusion, and the The lifting piece continues to rise.
  • the length of the sliding groove is equal to the sum of the lengths of the lower end and the second valve plate.
  • a preferred embodiment of the composite low-torque slab gate valve according to the present invention wherein the first permeable end is in communication with the medium passage when the limiting port is in contact with the limiting protrusion .
  • a preferred embodiment of the composite low-torque slab gate valve of the present invention wherein: when the limiting block interferes with the abutting member, the guiding channel and the transparent portion of the second valve plate Corresponding connection.
  • the invention has the beneficial effects that the composite low-torque slab gate valve provided by the invention has two second valve seats and a second valve plate built in the first valve plate to form a small sealing pair with low opening torque.
  • the flow guiding channel can be opened under full pressure condition, the pressure difference between the two sides of the first valve plate is reduced, and then the movement of the first valve plate is driven to realize the full opening of the large-diameter gate valve, and the large-diameter slab gate valve in the oil and gas pipeline can not be solved.
  • the problem of single operation is not only simple and easy, reduces costs, greatly reduces the labor intensity of the operator, and greatly shortens the time for opening the valve and improves production efficiency.
  • FIG. 1 is a schematic view showing the overall structure of a composite low-torque slab gate valve according to a first aspect of the present invention
  • FIG. 2 is a cross-sectional structural view showing the first low-torque slab gate valve of the first embodiment of the present invention in a state in which the valve is completely closed;
  • FIG. 3 is a schematic view showing the overall structure of a second valve plate in the composite low-torque slab gate valve according to the first aspect of the present invention
  • Figure 4 is a partial enlarged view of Figure 3 of the present invention.
  • FIG. 5 is a schematic view showing the overall structure of a first valve plate in a composite low-torque slab gate valve according to a second embodiment of the present invention, wherein the second valve plate is removed;
  • FIG. 6 is a schematic view showing the overall structure of a lifting member in a composite low-torque slab gate valve according to a third aspect of the present invention.
  • FIG. 7 is a partially enlarged schematic structural view of a third type of composite low torque slab gate valve according to the present invention.
  • FIG. 8 is a schematic structural view of the composite low-torque slab gate valve in the composite low-torque slab gate valve in conflict with the abutting member;
  • FIG. 9 is a schematic structural view of a composite low-torque slab gate valve in a composite low-torque slab gate valve in contact with a limit protrusion;
  • FIG. 10 is a structural schematic view of the composite low-torque slab gate valve of the present invention in a closing process after the valve is fully opened.
  • an embodiment or “an embodiment” as used herein refers to a particular feature, structure, or characteristic that can be included in at least one implementation of the invention.
  • FIGS. 1 to 3 are schematic views showing the overall structure of the composite low-torque slab gate valve in the fully closed state of the valve according to the first embodiment of the present invention, in order to realize the full-pressure opening operation of the single-plate gate valve, and simple Easy to do, greatly reducing the labor intensity of the operator, in this embodiment the composite low
  • the torque slab gate valve includes a valve body 100, a valve chamber 200, a first valve seat 300, a first valve plate 400, a second valve plate 500, and a second valve seat 600.
  • the valve body 100 is internally provided with a left-right direction.
  • a downstream medium passage; and the first valve seat 300 is disposed in the valve chamber 200 and communicates with the medium passages 101 at both ends thereof, that is, the first valve seat 300 connects the upstream medium passages at both ends and the downstream medium passage, where the first valve The seat 300 is a detachable surface part of the valve for supporting the fully closed position of the valve core and forming a sealing pair.
  • the diameter of the valve seat is the maximum diameter of the valve, and the valve seat is widely used, such as various rubber, plastic or metal.
  • the material can be used as a valve seat material; the first valve seat 300 sequentially divides the valve chamber 200 into an upper chamber 201, a middle chamber 202 and a lower chamber 203, wherein the middle chamber 202 communicates with the medium passage 101, and the diameter of the middle chamber 202 With media channel 101
  • the size of the diameter is matched, the medium can enter the middle cavity 202 through the upstream medium passage and then enter the downstream medium passage to complete the medium transportation; the first valve plate 400 is partially inserted into the first valve seat 300 to cut the medium passage 101, and the first valve plate The two ends of the 400 can move against the first valve seat 300 in the valve chamber 200 to cut off the medium.
  • the valve plate 400 When the first valve plate 400 moves up to the top end of the upper chamber 201, the upward movement cannot be continued, and the valve is in an open state, and When the first valve plate 400 moves downward to the bottom end of the lower chamber 203, the valve is in a closed state.
  • the valve plate As shown in FIG. 1 , when the first valve plate 400 moves to the lower end of the valve chamber 200, the valve plate is two. The pressure difference of the side medium gradually increases, and vice versa, the pressure difference between the two sides of the valve plate decreases.
  • an elastic member is disposed between the two ends of the first valve seat 300 and the valve body 100, and the valve seat is pressed against the first valve plate 400 by the elastic member to enhance the sealing performance.
  • the second valve plate 500 and the second valve seat 600 are further provided in this embodiment.
  • the second valve The plate 500 is disposed in the first valve plate 400, and the first valve plate 400 is further disposed with a flow guiding channel 401 disposed in the left-right direction.
  • the guiding channel 401 is located in the middle cavity 202 and communicates with the medium channel 101.
  • the two valve plate 500 moves up and down in the first valve plate 400, and can cut or turn on the flow guiding passage 401 in the first valve plate 400.
  • the first A valve plate 400 blocks the medium to close the valve.
  • both ends of the first valve plate 400 are in a full pressure state, and the second valve plate 500 in the first valve plate 400 is moved to facilitate the manual operation for pressure relief.
  • the flow channel 401 communicates with the medium channel 101, and the medium enters the flow channel 401 from the upstream medium channel and then flows into the downstream medium channel. Therefore, the pressure difference between the two ends of the first valve plate 400 is reduced, and when the value difference between the two ends is balanced, The pressure difference between the two sides of the valve is very small, so it is closed Torque is small, single operation It is also relatively easy.
  • the second valve seat 600 is similar to the first valve seat 300 for connecting the two end passages, and the second valve seat 600 is disposed on both sides of the second valve plate 500, and the two functions cooperate to realize the flow guiding passage 401. Turn it on and off. Also in this embodiment, preferably, an elastic member is disposed between the two ends of the second valve seat 600 and the second valve plate 500, and the valve seat is pressed against the second valve plate 500 by the elastic member to enhance the sealing performance. .
  • FIG. 5 is a schematic view showing the overall structure of a composite low-torque slab gate valve according to a second embodiment of the present invention in an open state, in order to realize a composite between the second valve plate 500 and the first valve plate 400.
  • the first valve plate 400 further includes a first cut end 402 and a first through end 403.
  • the The composite low-torque slab gate valve includes a valve body 100, a valve chamber 200, a first valve seat 300, a first valve plate 400, a second valve plate 500, and a second valve seat 600.
  • the valve body 100 is internally provided with a left-right direction.
  • a downstream medium passage; and the first valve seat 300 is disposed in the valve chamber 200 and communicates with the medium passages 101 at both ends thereof, that is, the first valve seat 300 connects the upstream medium passages at both ends and the downstream medium passage, where the first valve The seat 300 is a detachable surface part of the valve.
  • the support valve core is fully closed and constitutes a sealing pair.
  • the diameter of the valve seat is the maximum diameter of the valve, and the valve seat material is very wide.
  • valve seat 300 sequentially divides the valve chamber 200 into an upper chamber 201, a middle chamber 202 and a lower chamber 203, wherein the middle chamber 202 communicates with the medium passage 101, and the diameter of the middle chamber 202 coincides with the diameter of the medium passage 101, and the medium can After entering the middle cavity 202 through the upstream medium passage, the medium is transported into the downstream medium passage, and the first valve plate 400 is partially inserted into the first valve seat 300 to cut the medium passage 101, and the first valve plate 400 can interfere with the first end.
  • the valve seat 300 moves within the valve chamber 200 to intercept the medium.
  • the valve When the first valve plate 400 moves up to the top end of the upper chamber 201, the upward movement cannot be continued, at which time the valve is in the open state, and when the first valve plate 400 moves downward to the bottom end of the lower chamber 203, the valve is closed. In the state shown in FIG. 1 , when the first valve plate 400 moves to the lower end of the valve chamber 200, the pressure difference between the two sides of the valve plate gradually increases, and vice versa, the pressure difference between the two sides of the valve plate decreases.
  • an elastic member is disposed between the two ends of the first valve seat 300 and the valve body 100, and the valve seat is pressed against the first valve plate 400 by the elastic member to enhance the sealing performance.
  • the second valve plate 500 and the second valve seat 600 are further provided.
  • the second valve The plate 500 is disposed in the first valve plate 400, and the first valve plate 400 is further disposed with a flow guiding channel 401 disposed in the left-right direction.
  • the guiding channel 401 is located in the middle cavity 202 and communicates with the medium channel 101.
  • the two valve plate 500 moves up and down within the first valve plate 400 to cut or turn on the flow guiding passage 401 in the first valve plate 400.
  • the first valve plate 400 herein further includes a first cut end 402 and a first through end 403, wherein the first cut end 402 is a solid portion on which the sliding groove 402a is disposed in the up and down direction.
  • the second valve plate 500 slides in the sliding groove 402a to cut off the flow guiding passage 401.
  • the first transparent end 403 is a transparent portion and can communicate with the medium passage 101.
  • the second valve plate 500 and the first valve plate The 400 has the same structure, and the cut-off portion is a solid body, and includes a second cut-off end 501 and a second pass-through end 502, which are capable of cutting or conducting the flow guiding passage 401 disposed in the left-right direction in the first valve plate 400, wherein
  • the second truncated end 501 is a solid portion
  • the flow guiding channel 401 is cut off
  • the second transparent end 502 is a transparent portion, and can communicate with the guiding channel 401.
  • the transparent portion can communicate with the guiding channel 401.
  • the first valve plate 400 moves up to the top end of the upper chamber 201, the upward movement cannot be continued, at which time the first through end 403 is in complete communication with the medium passage 101, the valve is in a fully open state; and when the first valve plate 400 is When moving downward to the bottom end of the lower chamber 203, the first cut end 402 of the first valve plate 400 is just in the middle chamber 202, and the medium is blocked to bring the valve into a closed state, at which time both ends of the first valve plate 400 are at In the full pressure state, in order to facilitate the manual operation, the second valve plate 500 in the first valve plate 400 is moved to the flow passage 101 to communicate with the medium passage 101, that is, the second valve plate 500 moves in the sliding groove 402a, and the movement occurs.
  • the state includes that the second valve plate 500 is a solid cut-off portion corresponding to the flow guiding channel 401, blocking the medium passage; and the second valve plate 500 has a transparent portion corresponding to the communication guide channel 401, and the medium is provided by the upstream medium passage.
  • the pressure difference between the two ends of the first valve plate 400 is lowered.
  • the second valve seat 600 is similar to the first valve seat 300 for connecting the two end passages, and the second valve seat 600 is disposed on both sides of the second valve plate 500, and the two functions cooperate to realize the flow guiding passage 401. Turn it on and off. Also in this embodiment, preferably, an elastic member is disposed between the two ends of the second valve seat 600 and the second valve plate 500, and the valve seat is pressed against the second valve plate 500 by the elastic member to enhance the sealing performance. .
  • FIGS. 6 to 7 are schematic views showing the overall structure of the composite low-torque slab gate valve according to the third embodiment of the present invention, in order to realize the relationship between the second valve plate 500 and the first valve plate 400.
  • the movement of the second valve plate 500 in the up-and-down direction in the first valve plate 400 in the composite structure and the up-and-down movement of the first valve plate 400 in the valve chamber 200 are different from the second embodiment in this embodiment.
  • the composite low-torque slab gate valve further includes a lifting member 700, specifically, the valve body 100, the valve chamber 200, the first valve seat 300, the first valve plate 400, the second valve plate 500, and the second valve.
  • the seat 600 is provided with a medium passage 101 through which the medium flows in the left-right direction and a valve chamber 200 in the up-and-down direction, and the medium passage 101 communicates with the valve chamber 200 in the up-and-down direction in the valve body 100, that is, the valve
  • the cavity 200 is inserted into the medium passage 101 to divide it into an upstream medium passage and a downstream medium passage; and the first valve seat 300 is disposed in the valve chamber 200 and communicates with the medium passage 101 at both ends thereof, that is, the first valve seat 300 is connected at both ends An upstream medium passage and a downstream medium passage, wherein the first valve seat 300 is a detachable surface part in the valve for supporting the full closed position of the valve core and forming a sealing pair, wherein the valve seat diameter is the maximum circulation diameter of the valve, and
  • the valve seat material is very wide.
  • the valve seat material for example, various rubber, plastic or metal materials can be used as the valve seat material; the first valve seat 300 sequentially divides the valve chamber 200 into an upper chamber 201, a middle chamber 202 and a lower chamber 203, wherein the middle chamber 202 and media channel 1 01 is connected, and the diameter of the middle cavity 202 coincides with the diameter of the medium passage 101.
  • the medium can enter the middle cavity 202 through the upstream medium passage and then enter the downstream medium passage to complete the medium transportation; the first valve plate 400 is partially inserted into the first The medium passage 101 is cut in the valve seat 300, and both ends of the first valve plate 400 are movable against the first valve seat 300 to move within the valve chamber 200, thereby cutting the medium.
  • the valve When the first valve plate 400 moves up to the top end of the upper chamber 201, the upward movement cannot be continued, at which time the valve is in the open state, and when the first valve plate 400 moves downward to the bottom end of the lower chamber 203, the valve is closed. In the state shown in FIG. 1 , when the first valve plate 400 moves to the lower end of the valve chamber 200, the pressure difference between the two sides of the valve plate gradually increases, and vice versa, the pressure difference between the two sides of the valve plate decreases.
  • an elastic member is disposed between the two ends of the first valve seat 300 and the valve body 100, and the valve seat is pressed against the first valve plate 400 by the elastic member to enhance the sealing performance.
  • the second valve plate 500 and the second valve seat 600 are further provided in this embodiment.
  • the second valve The plate 500 is disposed in the first valve plate 400, and the first valve plate 400 is further disposed with a flow guiding channel 401 disposed in the left-right direction.
  • the guiding channel 401 is located in the middle cavity 202 and communicates with the medium channel 101.
  • the two valve plate 500 moves up and down within the first valve plate 400 to cut or turn on the flow guiding passage 401 in the first valve plate 400.
  • the first valve plate 400 herein further includes a first cut end 402 and a first through end 403, wherein the first cut end 402 is a solid portion on which the sliding groove 402a is disposed in the up and down direction.
  • the second valve plate 500 slides in the sliding groove 402a to cut off the flow guiding passage 401.
  • the first transparent end 403 is a transparent portion and can communicate with the medium passage 101.
  • the second valve plate 500 and the first valve plate 400 has the same structure, and its truncated portion is an entity, including a second truncated end 501 and a second transparent end 502, two
  • the flow guiding channel 401 disposed in the left and right direction of the first valve plate 400 can be cut off or turned on, wherein the second cutting end 501 is a solid portion, the flow guiding channel 401 is cut off, and the second transparent end 502 is a transparent portion. It can communicate with the flow guiding channel 401, and the transparent portion can communicate with the flow guiding channel 401.
  • the valve When the first valve plate 400 moves up to the top end of the upper chamber 201, the upward movement cannot be continued, at which time the first through end 403 is in complete communication with the medium passage 101, the valve is in a fully open state; and when the first valve plate 400 is When moving downward to the bottom end of the lower chamber 203, the first cut end 402 of the first valve plate 400 is just in the middle chamber 202, and the medium is blocked to bring the valve into a closed state, at which time both ends of the first valve plate 400 are at In the full pressure state, in order to facilitate the manual operation, the second valve plate 500 in the first valve plate 400 is moved to the flow passage 101 to communicate with the medium passage 101, that is, the second valve plate 500 moves in the sliding groove 402a, referring to FIG.
  • the second valve plate 500 is moved in the sliding groove 402a in the embodiment to provide a lifting member 700 and a top end of the second valve plate 500.
  • the upper end of the lifting member 700 Part of the thread is provided, which cooperates with an externally disposed nut to form a structure of a rolling screw.
  • the ball screw is an ideal product for converting a rotary motion into a linear motion or converting a linear motion into a rotary motion, which is through an outer end.
  • Hand wheel Transfer screw drive nut screw moves in the vertical direction, so as to drive the bottom of the second valve plate 500 moves in the vertical direction, greatly reduce the friction, reducing the torque handwheel.
  • a lifting protrusion 700 is further disposed on the lifting member 700.
  • the lifting member 700 is divided into an upper end 701 and a lower end 702 by the limiting protrusion 701, wherein the lower end 702 is connected to the second valve plate 500, and the inner diameter of the lower end 702 is smaller than
  • the inner diameter of the upper end 701 is preferably a one-piece structure in the present embodiment.
  • the upper end 701 and the lower end 702 are preferably arranged in a separate manner, and are connected by the limiting protrusions 701.
  • the second valve plate 500 is sized to match the sliding groove 402a, and the lower end 702 is smaller in diameter than the inner diameter of the sliding groove 402a, so the lower end 702 is located in the sliding groove 402a, and a certain gap S is formed therebetween, and the top end of the sliding groove 402a is formed.
  • the limiting block 402b is configured to cover the sliding slot 402a, and the lifting member 700 is connected to the second valve plate 500 through the limiting block 402b.
  • the limiting block is provided in order to facilitate the disassembly, installation and maintenance of the lifting member 700.
  • 402b is connected to the top end of the first valve plate 400, and the two are separated structures.
  • the two can also be an integrated structure; and the gap S is also disposed to interfere with the limiting block 402b.
  • the resisting member 402c is disposed at the bottom end of the gap S and is connected to the top end of the second valve plate 500.
  • the abutting member 402c and the second valve plate 500 are separated or integrated.
  • the length of the sliding groove 402a is equal to the sum of the lengths of the lower end 702 and the second valve plate 500.
  • the structure is set such that the state in the sliding groove 402a includes when the second valve plate 500 moves to the sliding
  • the second valve when the bottom end of the groove 402a 500 is a truncated portion of the entity Correspondingly sealing to the flow guiding channel 401, blocking the medium passage, continuing to rotate the hand wheel to raise the lifting member 700, thereby causing the second valve plate 500 to rise, and the cut portion of the second valve plate 500 gradually leaves the guiding passage 401, and The transparent portion gradually enters and is in communication with the flow guiding channel 401.
  • the transparent portion of the second valve plate 500 completely corresponds to the communication guiding channel 401, the limiting block 402b and the abutting member 402c are in contact with each other, and the guiding channel 401 is The transparent portion of the second valve plate 500 is completely correspondingly communicated.
  • the medium enters the flow guiding channel 401 from the upstream medium passage and then flows into the downstream medium passage. Therefore, the pressure difference between the two ends of the first valve plate 400 is reduced, and the ends of the first valve plate 400 are lowered.
  • the value differential pressure is balanced, the hand wheel is continuously rotated, and the lifting member 700 continues to rise.
  • the limiting block 402b is fixedly connected to the top end of the first valve plate 400.
  • the limiting block 402b has a tendency to move upward due to the upward force, so that the first valve plate 400 is moved upward; and in this embodiment, a valve cover 800 is further included, and the valve cover 800 covers the top of the valve chamber 200.
  • the body 100 is connected, and the same valve cover 800 and the valve body 100 can be either an integral type or a separate structure. Further, the valve cover 800 is further provided with a limited position port 801, which can be restrained from the limit protrusion 701.
  • the second valve seat 600 is similar to the first valve seat 300 for connecting the two end passages, and the second valve seat 600 is disposed on both sides of the second valve plate 500, and the two functions cooperate to realize the flow guiding passage 401. Turn it on and off.
  • an elastic member is disposed between the two ends of the second valve seat 600 and the second valve plate 500, and the valve seat is pressed against the second valve plate 500 by the elastic member to enhance the sealing performance.
  • the second valve plate 500 is no longer lowered by the bottom end of the sliding groove 402a, so that the flow guiding channel 401 is in a completely closed state, and the hand wheel is continuously rotated in the opposite direction, since the length of the sliding groove 402a is equal to the lower end 702.
  • the valve is fully closed.
  • the large-diameter high-pressure valve for oil and gas is generally used in a pressure environment of 15000 PSI.
  • the valve of the original slab gate valve still has a torque of 600-650 N/m during the opening process of the valve, so
  • the torque of the valve opening can be stably reduced to 100-130 N/m, and only a single person can be used without the need for a ball screw labor saving device.
  • the operation of opening the valve at full pressure is completed, which greatly reduces the labor intensity and saves the opening time.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Mechanically-Actuated Valves (AREA)

Abstract

L'invention concerne un robinet-vanne plat à faible couple combiné, comprenant un corps de vanne (100), une cavité de vanne (200), des premiers sièges de vanne (300) et une première plaque de vanne (400); les premiers sièges de vanne (300) sont disposés dans la cavité de vanne (200) et relient des canaux de milieu (101) situés au niveau de deux extrémités de cette dernière, et divisent la cavité de vanne (200) en une cavité supérieure (201), une cavité intermédiaire (202) et une cavité inférieure (203) dans l'ordre. Ladite vanne comprend en outre : une seconde plaque de vanne (500), qui est disposée dans la première plaque de vanne (400), la première plaque de vanne (400) étant pourvue de canaux de guidage d'écoulement (401), les canaux de guidage d'écoulement (401) étant en communication avec les canaux de milieu (101); et des seconds sièges de vanne (600), qui relient les canaux de guidage d'écoulement (401) situés aux deux extrémités du second siège de vanne. En fournissant les deux seconds sièges de vanne (600) et la seconde plaque de vanne (500) à l'intérieur de la première plaque de vanne (400), une petite paire d'étanchéité ayant un faible couple d'ouverture est formée, de telle sorte que les canaux de guidage d'écoulement (401) peuvent être ouverts dans des conditions de pleine pression, ce qui réduit la différence de pression entre deux côtés de la première plaque de vanne (400) puis en amenant la première plaque de vanne (400) à se déplacer de façon à ouvrir complètement le robinet-vanne de grand diamètre, résolvant le problème classique selon lequel un robinet-vanne plat, qui a un grand diamètre, dans un pipeline d'huile et de gaz ne peut pas être actionné par une seule personne.
PCT/CN2017/094810 2017-07-28 2017-07-28 Robinet-vanne plat à faible couple combiné WO2019019127A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/094810 WO2019019127A1 (fr) 2017-07-28 2017-07-28 Robinet-vanne plat à faible couple combiné

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/094810 WO2019019127A1 (fr) 2017-07-28 2017-07-28 Robinet-vanne plat à faible couple combiné

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WO2019019127A1 true WO2019019127A1 (fr) 2019-01-31

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711262A (en) * 1985-01-31 1987-12-08 Fmc Corporation Uni-directional/bi-directional gate valve
CN2072623U (zh) * 1990-06-09 1991-03-06 曲波 大口径孔板阀
CN201145054Y (zh) * 2007-12-10 2008-11-05 潘挺宇 带导流孔的平板闸阀
CN101680554A (zh) * 2008-04-14 2010-03-24 桑德罗斯企业公司 具有均衡器端口的闸门阀
CN102537392A (zh) * 2012-03-06 2012-07-04 苏州道森钻采设备股份有限公司 先导式闸阀
WO2013158029A1 (fr) * 2012-04-18 2013-10-24 Aker Solutions Pte Ltd Vanne pour un robinet-vanne
CN103925382A (zh) * 2014-03-25 2014-07-16 南通市电站阀门有限公司 一种先导式电站闸阀
US20150083954A1 (en) * 2013-09-24 2015-03-26 Ge Oil & Gas Pressure Control Lp Pressure equalizing valve
RU2586958C1 (ru) * 2014-11-21 2016-06-10 Общество с ограниченной ответственностью Научно-производственная фирма "МКТ-АСДМ" Запорно-регулирующее устройство
CN107387787A (zh) * 2017-07-28 2017-11-24 江苏政轩石油机械股份有限公司 一种复合式低扭矩平板闸阀

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711262A (en) * 1985-01-31 1987-12-08 Fmc Corporation Uni-directional/bi-directional gate valve
CN2072623U (zh) * 1990-06-09 1991-03-06 曲波 大口径孔板阀
CN201145054Y (zh) * 2007-12-10 2008-11-05 潘挺宇 带导流孔的平板闸阀
CN101680554A (zh) * 2008-04-14 2010-03-24 桑德罗斯企业公司 具有均衡器端口的闸门阀
CN102537392A (zh) * 2012-03-06 2012-07-04 苏州道森钻采设备股份有限公司 先导式闸阀
WO2013158029A1 (fr) * 2012-04-18 2013-10-24 Aker Solutions Pte Ltd Vanne pour un robinet-vanne
US20150083954A1 (en) * 2013-09-24 2015-03-26 Ge Oil & Gas Pressure Control Lp Pressure equalizing valve
CN103925382A (zh) * 2014-03-25 2014-07-16 南通市电站阀门有限公司 一种先导式电站闸阀
RU2586958C1 (ru) * 2014-11-21 2016-06-10 Общество с ограниченной ответственностью Научно-производственная фирма "МКТ-АСДМ" Запорно-регулирующее устройство
CN107387787A (zh) * 2017-07-28 2017-11-24 江苏政轩石油机械股份有限公司 一种复合式低扭矩平板闸阀

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