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CN-121977078-A - Pressure flow regulating valve and control method

CN121977078ACN 121977078 ACN121977078 ACN 121977078ACN-121977078-A

Abstract

The application relates to the technical field of valves, and provides a pressure flow regulating valve and a control method, wherein the pressure flow regulating valve comprises a valve body, a sliding butterfly plate and a driving unit, and the valve body is provided with a flow channel for a medium to pass through; the valve body is provided with a first sealing surface at the inlet end of the flow channel, the sliding butterfly plate is provided with a second sealing surface, an annular channel for medium inflow is formed between the first sealing surface and the second sealing surface, when the connecting seat and the connecting shaft are far away from each other, the annular channel is gradually reduced, and the driving unit is arranged on the valve body and used for driving the connecting seat and the connecting shaft to be close to or far away from each other. The pressure flow regulating valve can reduce flow abrupt change during valve opening degree regulation.

Inventors

  • HONG XIRONG
  • HE WENJIE
  • Hong Qiuhong
  • Hong Jiejun
  • HONG XIYI

Assignees

  • 云南流体规划研究院有限公司

Dates

Publication Date
20260505
Application Date
20260324

Claims (10)

  1. 1. A pressure flow regulating valve is characterized by comprising a valve body (1), a sliding butterfly plate (2) and a driving unit, wherein the valve body (1) is provided with a flow channel (11) for a medium to pass through, a connecting seat (3) is slidably arranged in the flow channel (11), the sliding butterfly plate (2) is provided with a connecting shaft (21), the connecting shaft (21) is slidably inserted into the connecting seat (3), the inlet end of the valve body (1) positioned in the flow channel (11) is provided with a first sealing surface (11), the sliding butterfly plate (2) is provided with a second sealing surface (22), an annular channel (111) for the medium to flow in is formed between the first sealing surface (11) and the second sealing surface (22), when the connecting seat (3) and the connecting shaft (21) are far away from each other, the annular channel (111) is gradually reduced, and the driving unit is arranged on the valve body (1) and is used for driving the connecting seat (3) and the connecting shaft (21) to be close to or far away from each other.
  2. 2. A pressure flow regulating valve as set forth in claim 1 wherein said first sealing surface (11) and said second sealing surface (22) each have an outer diameter that gradually increases from an inlet end closer to said flow passage (11) to an outlet end farther from said flow passage (11), and wherein said second sealing surface (22) is fitted with a seal ring (221).
  3. 3. The pressure flow regulating valve according to claim 1, wherein the driving unit comprises a valve rod (4) and an actuating mechanism (5), the valve body (1) is connected with a valve cover (12), the valve rod (4) is slidably arranged on the valve cover (12), one end of the valve rod (4) extends into the flow channel (11) and is connected with a connecting block (41), transmission rods (42) are arranged between the connecting block (41) and the connecting seat (3) and between the connecting block (41) and the connecting shaft (21), one end of each transmission rod (42) is hinged to the connecting block (41), the other end of each transmission rod is hinged to the connecting seat (3) or the connecting shaft (21), and the actuating mechanism (5) is arranged on the valve cover (12) and is used for driving the valve rod (4) to slide.
  4. 4. A pressure flow regulating valve according to claim 3 is characterized in that a first connecting frame (13) is arranged at the inlet end of the flow channel (11), a second connecting frame (14) is arranged at the outlet end of the flow channel (11), inserting grooves (15) are formed in the side walls, close to each other, of the first connecting frame (13) and the second connecting frame (14), one end, far away from the connecting seat (3), of the connecting shaft (21) is slidably inserted into the inserting grooves (15) of the first connecting frame (13), the connecting seat (3) is provided with a connecting rod (31), and one end, far away from the connecting shaft (21), of the connecting rod (31) is slidably inserted into the inserting grooves (15) of the second connecting frame (14).
  5. 5. A pressure flow regulating valve according to claim 4, wherein the connecting shaft (21) comprises a first connecting portion (211) and a second connecting portion (212), the first connecting portion (211) is connected with the sliding butterfly plate (2), the second connecting portion (212) is slidably inserted into the connecting seat (3), one end of the first connecting portion (211) is provided with a rotating shaft (213), one end of the first connecting portion (211) and one end of the second connecting portion (212) are hinged to each other through the rotating shaft (213), a turnover assembly (6) is arranged between the connecting shaft (21) and the connecting seat (3), and when the first connecting portion (211) is separated from the inserting groove (15) of the first connecting frame (13) and the connecting shaft (21) and the connecting seat (3) are continuously driven to be close to each other, the turnover assembly (6) forces the sliding butterfly plate (2) to turn towards one side far away from the valve cover (12).
  6. 6. The pressure flow regulating valve according to claim 5, wherein the turning component (6) comprises a guide post (61) and a guide frame (62), the guide post (61) is connected to the rotating shaft (213) and is eccentrically arranged with the rotating shaft (213), the guide frame (62) is arranged at one end of the connecting seat (3) close to the connecting shaft (21), the guide frame (62) is provided with a guide sliding groove (621) for the guide post (61) to be embedded, the guide sliding groove (621) comprises a straight line section (622) and a guide section (623), one end of the straight line section (622) is communicated with one end of the guide section (623), the guide post (61) is positioned in the straight line section (622) when the first connecting part (211) is inserted into the inserting groove (15) of the first connecting frame (13), and the guide post (61) moves to the connecting position of the straight line section (622) and the guide section (623) when the first connecting part (211) is separated from the inserting groove (15) of the first connecting frame (13).
  7. 7. The pressure flow regulating valve according to claim 4, wherein a plurality of flow expansion channels (23) are formed in the surface, close to the inlet end of the flow channel (11), of the sliding butterfly plate (2), one end of each flow expansion channel (23) penetrates through the surface, far away from the inlet end of the flow channel (11), of the sliding butterfly plate (2), and an opening and closing assembly (7) for opening and closing the flow expansion channels (23) is arranged between the valve body (1) and the sliding butterfly plate (2).
  8. 8. The pressure flow regulating valve according to claim 7, wherein the opening and closing assembly (7) comprises an opening and closing plate (71), a return spring (72) and a pull rod (73), the opening and closing plate (71) is slidably arranged on the surface, close to the inlet end of the flow channel (11), of the sliding butterfly plate (2), a plurality of expansion holes (711) are formed in the surface of the opening and closing plate (71), the expansion holes (711) and the expansion channels (23) are arranged in a staggered mode, the return spring (72) is arranged between the opening and closing plate (71) and the sliding butterfly plate (2), the return spring (72) forces the opening and closing plate (71) to be attached to the sliding butterfly plate (2), one end of the pull rod (73) is connected to the opening and closing plate (71), the other end of the pull rod penetrates into the inserting groove (15) of the first connecting frame (13) and is connected with an anti-falling head (731), and the anti-falling head (731) is slidably connected between the first connecting frame (13).
  9. 9. The pressure flow regulating valve according to claim 8, wherein the surface of the sliding butterfly plate (2) close to the inlet end of the flow passage (11) is provided with a groove (24) in which an opening and closing plate (71) is embedded, the surface of the opening and closing plate (71) close to the groove (24) is provided with a sealing ring (712), and the first connecting frame (13) is provided with a pressing surface (131) for the opening and closing plate (71) to abut against.
  10. 10. A control method of a pressure flow regulating valve, based on a pressure flow regulating valve according to any of claims 1-9, which, depending on the medium pressure, drives the coupling seat (3) and the coupling shaft (21) to slide to force the second sealing surface (22) of the sliding butterfly plate (2) towards or away from the first sealing surface (11) of the valve body (1).

Description

Pressure flow regulating valve and control method Technical Field The application relates to the technical field of valves, in particular to a pressure flow regulating valve and a control method. Background In the production flow of metallurgical, mining, chemical industry and other industries, pressure and flow regulation of slurry medium is a key link for guaranteeing production continuity and stability, and a slurry medium pressure and flow regulating valve is used as a core control component, so that the working performance of the slurry medium pressure and flow regulating valve directly influences the efficiency and safety of the whole production system. The traditional valve adopts a single valve clack or a simple adjusting structure, and the fit clearance between the valve clack and the valve seat is easy to change at a non-uniform speed in the adjusting process, so that the flow suddenly increases or decreases when the adjusting mechanism acts, and smooth transition is difficult to realize. The abrupt change of flow can cause unbalance of feeding in subsequent procedures, influence uniformity of product quality, easily cause pressure impact of a system, damage related equipment such as a pipeline, a pump body and the like, and increase production maintenance cost and potential safety hazard. Therefore, further improvements are needed. Disclosure of Invention In order to reduce flow abrupt change during valve opening adjustment, the application provides a pressure flow regulating valve and a control method. In a first aspect, the present application provides a pressure and flow regulating valve, which adopts the following technical scheme: A pressure flow regulating valve comprises a valve body, a sliding butterfly plate and a driving unit, wherein the valve body is provided with a flow channel for a medium to pass through, a connecting seat is slidably arranged in the flow channel, the sliding butterfly plate is provided with a connecting shaft, the connecting shaft is slidably inserted into the connecting seat, a first sealing surface is arranged at the inlet end of the valve body, which is positioned in the flow channel, the sliding butterfly plate is provided with a second sealing surface, an annular channel for the medium to flow in is formed between the first sealing surface and the second sealing surface, when the connecting seat and the connecting shaft are far away from each other, the annular channel is gradually reduced, and the driving unit is arranged in the valve body and used for driving the connecting seat and the connecting shaft to be close to each other or far away from each other. By adopting the technical scheme, the connecting seat and the connecting shaft are driven to be far away from each other by the driving unit, so that the first sealing surface and the second sealing surface are propped against each other, and the closing of the flow channel is realized. The connecting seat and the connecting shaft are driven to be close to each other, so that the sliding butterfly plate slides towards one side far away from the inlet end of the flow channel, an annular channel for medium inflow is formed between the first sealing surface and the second sealing surface, and the opening of the flow channel is realized. By controlling the sliding speed of the sliding butterfly plate, the size change of the annular channel is uniformly controlled, and the flow mutation during the valve opening adjustment is reduced as much as possible. Optionally, the outer diameters of the first sealing surface and the second sealing surface are gradually increased from the inlet end close to the flow channel to the outlet end far away from the flow channel, and the sealing ring is embedded on the second sealing surface. By adopting the technical scheme, the outer diameters of the first sealing surface and the second sealing surface are gradually increased from the inlet end close to the flow channel to the outlet end far away from the flow channel, so that an inclined surface for guiding the medium to flow into the flow channel is formed. When the flow channel is closed, the first sealing surface and the second sealing surface are propped against each other, the sealing ring can improve the whole sealing effect, and the possibility of leakage of the medium is reduced. The valve body is connected with a valve cover, the valve rod penetrates through the valve cover in a sliding mode, one end of the valve rod extends into the flow channel and is connected with a connecting block, transmission rods are arranged between the connecting block and the connecting seat and between the connecting block and the connecting shaft, one end of each transmission rod is hinged to the connecting block, the other end of each transmission rod is hinged to the connecting seat or the connecting shaft, and the executing mechanism is arranged on the valve cover and used for driving the valve rod to slide. Through adopting foretell