Straight-through plug valve

Abstract

The invention discloses a straight-through plug valve, and relates to the technical field of valves. According to the technical scheme, the valve is characterized by comprising a valve body, a movable plug assembly is arranged in the valve body and comprises a baffle, and a connecting plate perpendicular to the baffle is arranged on the surface of the side, facing the inlet end of the valve body, of the baffle; the top of the valve body is fixedly connected with a guide sleeve communicated with the interior of the valve body, the top of the connecting plate is hinged to the inner wall of the side, close to the outlet end of the valve body, of the guide sleeve through a hinge shaft, the connecting plate can rotate in the vertical plane around the hinge shaft, and the valve further comprises a driving assembly used for driving the connecting plate to rotate. The purpose of the present invention is to provide a through plug valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more specifically, it relates to a through plug valve. Background Art

[0002] In an industrial pipeline system, as a core component for fluid control, the sealing performance, durability, and maintenance convenience of a valve directly affect the operating efficiency and safety of the system. Traditional valves (such as plug valves, ball valves, gate valves, etc.) usually adopt a fixed valve core structure, and the valve core and the valve body achieve the opening and closing functions through rotational or lifting movements.

[0003] A Chinese patent with the application number 202510173506.0 previously applied by the applicant discloses a torque-free plug valve, which includes a valve body, a connecting body, a valve seat, a cylinder body, and a cylinder end cover. A cylinder body, a piston, and a cylinder end cover for switching are provided inside the valve body; the valve body and the cylinder body are of an integral structure. One end of the piston is provided with a guide rod, which is located at the sealed end of the cylinder body, and the other end is a plug end that cooperates with the valve seat. The entire piston is of an integral structure; the cylinder end cover is located at the end face of the through hole of the cylinder body; the connecting body is provided with a valve seat, and the valve seat and the connecting body are of a split structure or an integral structure, and the valve seat cooperates with the plug end; after the piston and the cylinder body are assembled, a sealed cylinder chamber is formed; when the cylinder end cover is assembled, a cross-sectional difference is formed inside and outside the piston; the cross-sectional area S1 of the cylinder body end of the piston is larger than the cross-sectional area S2 of the plug end; when the upstream channel pressure of the plug valve is introduced into the cylinder chamber, the piston is pressurized, and due to the acting force of the cross-sectional difference, the plug end axially displaces towards the valve seat end until the plug end cooperates with the valve seat to achieve the closing of the plug valve; when the pressure in the cylinder chamber is released, the plug end moves in the reverse direction due to the pressure of the pipeline, and the piston axially displaces to the bottom of the sealed end face of the cylinder body.

[0004] The above technical solution does not require an actuator with a power source to control the opening and closing of the valve, which can effectively reduce production costs and is convenient for installation. However, during actual use, part of the piston remains in the fluid channel. Therefore, during daily maintenance, it is impossible to directly enter the valve from the pipeline for cleaning work, and particulate matter or viscous media are likely to accumulate on the surface of the piston. Especially in the chemical, food, or pharmaceutical industries, it may cause pollution or blockage.

[0005] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a through plug valve.

[0007] The above technical object of the present invention is achieved by the following technical solutions: A through plug valve, including a valve body, an active plug assembly is arranged inside the valve body, the active plug assembly includes a baffle plate, and a connecting plate perpendicular to the baffle plate is arranged on one side surface of the baffle plate facing the inlet end of the valve body;

[0008] A guide sleeve communicating with the inside of the valve body is fixedly connected to the top of the valve body. The top of the connecting plate is hinged to the inner wall of the guide sleeve close to the outlet end of the valve body through a hinge shaft, and the connecting plate can rotate around the hinge shaft in a vertical plane. A driving assembly is also included for driving the connecting plate to rotate.

[0009] The present invention is further arranged as follows: The top of the guide sleeve is hermetically arranged. A sealing plate is slidably connected to the guide sleeve along the vertical direction. A pressurizing chamber is formed in the space above the sealing plate inside the guide sleeve. A vertical connecting rod is fixedly connected to the bottom of the sealing plate. The bottom end of the connecting rod is hinged with a hinged rod, and the other end of the hinged rod is hinged to the connecting plate. The driving assembly is used to drive the sealing plate to move up and down, and drive the connecting plate to rotate around the hinge shaft under the action of the hinged rod.

[0010] The present invention is further arranged as follows: The driving assembly includes a valve controller and a pressure guiding valve. The inlet end of the pressure guiding valve is connected to the inlet end of the valve body, and its outlet end is connected to the input port of the valve controller through a first diversion pipe. The output port of the valve controller is connected to the top of the guide sleeve through a second diversion pipe and communicates with the pressurizing chamber;

[0011] When the valve controller is switched to the closed state, the first diversion pipe and the second diversion pipe are communicated. The medium pressure at the inlet end of the valve body enters the pressurizing chamber through the pressure guiding valve, thereby pushing the sealing plate downward and driving the baffle plate to deflect to the closed state.

[0012] The present invention is further arranged as follows: A sealing cover is arranged on the circumferential side surface of the guide sleeve. A closed annular pressure storage chamber is formed between the sealing cover and the guide sleeve. The valve controller is also connected to the bottom of the annular pressure storage chamber through a third diversion pipe. The bottom of the annular pressure storage chamber is connected to the outlet end of the valve body through a fourth diversion pipe;

[0013] When the valve controller is switched to the open state, the second diversion pipe and the third diversion pipe are conducted. The medium in the pressurizing chamber enters the pressure storage chamber through the second diversion pipe and the third diversion pipe. The medium pressure in the pressurizing chamber becomes smaller, causing the sealing plate to move upward, driving the connecting plate and the baffle plate to deflect upward to control the opening of the valve body.

[0014] The present invention is further configured such that a sealing ring is slidably connected in the annular pressure storage cavity along the height direction, and a plurality of return springs are arranged in the annular pressure storage cavity. The top end of the return spring is fixedly connected to the top of the annular pressure storage cavity, and the bottom end thereof is fixedly connected to the upper surface of the sealing ring;

[0015] After the medium in the pressurizing cavity enters the annular pressure storage cavity, it pushes the sealing ring to rise along the annular pressure storage cavity, and the return spring is compressed. When the valve body is closed again and the third diversion pipe is closed, the new diversion medium enters the pressurizing cavity again. Under the pressure of the return spring, the medium in the annular pressure storage cavity enters the outlet end of the valve body through the fourth diversion pipe.

[0016] The present invention is further configured such that a medium filtering device is arranged between the pressure guiding valve and the valve controller, and the medium filtering device is connected between the first diversion pipes.

[0017] The present invention is further configured such that an angle indicator is arranged on the outer surface of the valve body, an angle pointer is rotatably connected to the surface of the angle indicator, and one end of the hinge shaft extends out of the outer surface and is connected to the angle pointer.

[0018] The present invention is further configured such that an abutting edge is arranged along the circumferential inner wall of the valve body. When the baffle is in the vertical closed state, the circumferential side of one surface of the baffle abuts against the abutting edge.

[0019] The present invention is further configured such that a first inclined surface is arranged on the circumferential side of the surface of the baffle facing the abutting edge, and a second inclined surface parallel to the first inclined surface is arranged along the circumferential side of the end of the abutting edge. When the valve body is in the closed state, the first inclined surface on the circumferential side of the baffle abuts against the second inclined surface of the abutting edge.

[0020] The present invention has the following beneficial effects: The driving assembly drives the connecting plate to deflect. When the baffle is in the vertical state, the valve body is in the fully closed state. When the driving assembly drives the connecting plate to deflect upward, the baffle deflects upward from the vertical state and gradually opens the valve. Finally, the baffle is in the horizontal state and is completely received at the bottom of the guiding sleeve, and an unobstructed straight-through flow channel is formed between the inlet end and the outlet end of the valve body, so that it is convenient to clean the inside of the pipeline and the valve body, and prevent too much impurities from remaining on the surface of the baffle, resulting in blockage of the valve and pollution of the diversion medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of this embodiment;

[0022] Figure 2 is a half-sectional structural schematic diagram of this embodiment;

[0023] Figure 3Schematic structural diagram of the movable plug assembly in this embodiment;

[0024] Figure 4 Schematic structural diagram of another angle in this embodiment;

[0025] Figure 5 is Figure 2 Partial enlarged schematic diagram of part A in

[0026] Description of the drawings: 1. Valve body; 2. Baffle plate; 3. Connecting plate; 4. Guide sleeve; 5. Hinge shaft; 6. Sealing plate; 7. Pressurizing chamber; 8. Link; 9. Hinge rod; 10. Valve controller; 11. Pressure guiding valve; 12. First diversion pipe; 13. Second diversion pipe; 14. Sealing cover; 15. Annular pressure storage chamber; 16. Third diversion pipe; 17. Sealing ring; 18. Return spring; 19. Fourth diversion pipe; 20. Medium filtering device; 21. Angle indicator; 22. Angle pointer; 23. Contact edge; 24. First inclined surface; 25. Second inclined surface. Detailed implementation manners

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Among them, the same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0029] As shown in the figure, a straight-through plug valve includes a valve body 1, and a movable plug assembly is arranged inside the valve body 1. The movable plug assembly includes a baffle plate 2, and a connecting plate 3 perpendicular to the baffle plate 2 is arranged on one side surface of the baffle plate 2 facing the inlet end of the valve body 1;

[0030] The top of the valve body 1 is fixedly connected with a guide sleeve 4 communicating with the inside of the valve body 1. The top of the connecting plate 3 is hinged to the inner wall of the guide sleeve 4 on the side close to the outlet end of the valve body 1 through a hinge shaft 5, and the connecting plate 3 can rotate around the hinge shaft 5 in a vertical plane. A driving assembly for driving the connecting plate 3 to rotate is also included, and the driving assembly adopts a non-power source actuator;

[0031] The driving component drives the connecting plate 3 to deflect. When the baffle 2 is in the vertical state, the valve body 1 is in the fully closed state. When the driving component drives the connecting plate 3 to deflect upward, the baffle 2 deflects upward from the vertical state and gradually opens the valve. Finally, the baffle 2 is in the horizontal state and is completely received at the bottom of the guide sleeve 4. An unobstructed straight-through flow channel is formed between the inlet end and the outlet end of the valve body 1, so that it is convenient to clean the inside of the pipeline and the valve body 1, and prevent excessive impurities from remaining on the surface of the baffle 2, resulting in the blockage of the valve and the pollution of the guiding medium.

[0032] The top of the guide sleeve 4 is sealed. A sealing plate 6 is slidably connected to the guide sleeve 4 in the vertical direction. A closed pressure chamber 7 is formed in the space above the sealing plate 6 inside the guide sleeve 4. A vertical connecting rod 8 is fixedly connected to the bottom of the sealing plate 6. The bottom end of the connecting rod 8 is hinged with a hinged rod 9, and the other end of the hinged rod 9 is hinged to the connecting plate 3. The driving component is used to drive the sealing plate 6 to move up and down, and drives the connecting plate 3 to rotate around the hinge shaft 5 under the action of the hinged rod 9 to control the opening and closing of the valve body 1.

[0033] The driving component includes a valve controller 10 and a pressure guiding valve 11. The inlet end of the pressure guiding valve 11 is connected to the inlet end of the valve body 1, and its outlet end is connected to the input port of the valve controller 10 through a first diversion pipe 12. The output port of the valve controller 10 is connected to the top of the guide sleeve 4 through a second diversion pipe 13 and communicates with the pressure chamber 7. The cross-sectional area S1 of the pressure chamber 7 is larger than the cross-sectional area of the valve body 1;

[0034] When the valve controller 10 is switched to the closed state (the valve controller 10 can control the opening and closing of each port, and its structure and control method are prior arts and will not be elaborated in this embodiment), the first diversion pipe 12 and the second diversion pipe 13 are communicated. The medium pressure at the inlet end of the valve body 1 enters the pressure chamber 7 through the pressure guiding valve 11, thereby pushing the sealing plate 6 to move downward and driving the baffle 2 to deflect to the closed state. The cross-sectional area S1 of the pressure chamber 7 is larger than the cross-sectional area of the valve body 1, so that the pressure in the pressure chamber 7 is greater than the pressure in the valve body 1, ensuring the stability of the baffle 2 in the closed state.

[0035] A sealing cover 14 is arranged on the circumferential side surface of the guide sleeve 4. A closed annular pressure storage chamber 15 is formed between the sealing cover 14 and the guide sleeve 4. The valve controller 10 is also connected to the bottom of the annular pressure storage chamber 15 through a third diversion pipe 16. The bottom of the annular pressure storage chamber 15 is connected to the outlet end of the valve body 1 through a fourth diversion pipe 19;

[0036] When the valve controller 10 switches to the open state, the first diversion pipe closes, and the second diversion pipe 13 communicates with the third diversion pipe 16. Since the pressure in the pressurizing chamber 7 is greater than the pressure at the outlet end of the valve body 1, the pressure in the pressurizing chamber 7 can be made greater than the pressure in the annular pressure storage chamber 15. The pressure in the pressurizing chamber 7 enters the annular pressure storage chamber 15 through the second diversion pipe 13 and the third diversion pipe 16. The pressure of the medium in the pressurizing chamber 7 becomes smaller, causing the sealing plate 6 to move upward, driving the connecting plate 3 and the baffle 2 to deflect upward, and controlling the opening of the valve body 1.

[0037] A sealing ring 17 is slidably connected in the annular pressure storage chamber 15 in the height direction. A plurality of reset springs 18 are evenly arranged along the circumferential side of the annular pressure storage chamber 15. The top end of the reset spring 18 is fixedly connected to the top of the annular pressure storage chamber 15, and its bottom end is fixedly connected to the upper surface of the sealing ring 17. When the valve body is in the closed state, under the elastic force of the reset spring 18, the bottom of the sealing ring 17 abuts against the bottom of the annular pressure storage chamber 15;

[0038] After the pressure in the pressurizing chamber 7 enters the annular pressure storage chamber 15 through the second diversion pipe 13 and the third diversion pipe 16, the sealing ring 17 rises along the annular pressure storage chamber 15, and the reset spring 18 is compressed. When the valve body 1 is closed again and the third diversion pipe 16 is closed, the first diversion pipe 12 communicates with the second diversion pipe 13, and a new diversion medium enters the pressurizing chamber 7 again. Under the pressure of the reset spring 18, the medium in the annular pressure storage chamber 15 enters the outlet end of the valve body 1 through the fourth diversion pipe 19.

[0039] A medium filtering device 20 is provided between the pressure guiding valve 11 and the valve controller 10. According to different forms of the diversion medium, different models of filtering devices can be selected, which are all prior arts and will not be elaborated in this embodiment. The medium filtering device 20 is connected between the first diversion pipes 12 to filter the diversion medium and prevent impurities from entering the valve controller 10 and affecting its service life.

[0040] An angle indicator 21 is provided on the outer surface of the valve body 1. An angle pointer 22 is rotatably connected to the surface of the angle indicator 21. One end of the hinge shaft 5 extends out of the outer surface and is connected to the angle pointer 22. By observing the deflection angle of the angle pointer 22, the deflection angle of the hinge shaft 5 can be visually observed, so that the opening and closing state and the opening and closing angle of the baffle 2 can be conveniently observed, and the valve with a fault can be quickly found, which is convenient for later maintenance.

[0041] The valve body 1 is provided with an abutting edge 23 along its circumferential inner wall. When the baffle 2 is in the vertical closed state, the periphery of one side surface of the baffle 2 abuts against the abutting edge 23. A first inclined surface 24 is provided on the periphery of the side surface of the baffle 2 facing the abutting edge 23. The end of the abutting edge 23 is provided with a second inclined surface 25 parallel to the first inclined surface 24 along its circumference. When the valve body 1 is in the closed state, the first inclined surface 24 on the periphery of the baffle 2 abuts against the second inclined surface 25 of the abutting edge 23 to ensure the sealing performance when the valve body 1 is in the closed state.

[0042] The specific embodiments are only explanations of the present invention and not limitations thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A direct-through plug valve, characterized in that: It includes a valve body (1), and an active plug assembly is arranged inside the valve body (1). The active plug assembly includes a baffle plate (2), and a connecting plate (3) perpendicular to the baffle plate (2) is arranged on one side surface of the baffle plate (2) facing the inlet end of the valve body (1). A guide sleeve (4) communicating with the inside of the valve body (1) is fixedly connected to the top of the valve body (1). The top of the connecting plate (3) is hinged to the inner wall of the guide sleeve (4) close to the outlet end of the valve body (1) through a hinge shaft (5), and the connecting plate (3) can rotate in a vertical plane around the hinge shaft (5). There is also a driving assembly for driving the connecting plate (3) to rotate, and the driving assembly adopts a non-power source actuator. The driving assembly drives the connecting plate (3) to deflect. When the baffle plate (2) is in a vertical state, the valve body (1) is in a fully closed state. When the driving assembly drives the connecting plate (3) to deflect upward, the baffle plate (2) deflects upward from the vertical state and gradually opens the valve. Finally, the baffle plate (2) is in a horizontal state and is completely received at the bottom of the guide sleeve (4), and an unobstructed straight-through flow channel is formed between the inlet end and the outlet end of the valve body (1).

2. The straight-through plug valve according to claim 1, characterized in that: The top of the guide sleeve (4) is sealed. A sealing plate (6) is slidably connected to the guide sleeve (4) in the vertical direction. A pressurizing chamber (7) is formed in the space above the sealing plate (6) inside the guide sleeve (4). A vertical connecting rod (8) is fixedly connected to the bottom of the sealing plate (6). The bottom end of the connecting rod (8) is hinged to a hinged rod (9), and the other end of the hinged rod (9) is hinged to the connecting plate (3). The driving assembly is used to drive the sealing plate (6) to lift and drive the connecting plate (3) to rotate around the hinge shaft (5) under the action of the hinged rod (9).

3. The straight-through plug valve according to claim 2, wherein: The driving assembly includes a valve controller (10) and a pressure guiding valve (11). The inlet end of the pressure guiding valve (11) is connected to the inlet end of the valve body (1), and its outlet end is connected to the input port of the valve controller (10) through a first diversion pipe (12). The output port of the valve controller (10) is connected to the top of the guide sleeve (4) through a second diversion pipe (13) and communicates with the pressurizing chamber (7). The cross-sectional area S1 of the pressurizing chamber (7) is larger than the cross-sectional area of the valve body (1). When the valve controller (10) is switched to the closed state, the first diversion pipe (12) is communicated with the second diversion pipe (13), and the medium pressure at the inlet end of the valve body (1) enters the pressurizing chamber (7) through the pressure guiding valve (11), thereby pushing the sealing plate (6) to move downward and driving the baffle plate (2) to deflect to the closed state.

4. A direct-through plug valve according to claim 3, characterized in that: A sealing cover (14) is arranged on the circumferential side surface of the guide sleeve (4). A sealed annular pressure storage chamber (15) is formed between the sealing cover (14) and the guide sleeve (4). The valve controller (10) is also connected to the bottom of the annular pressure storage chamber (15) through a third diversion pipe (16). The bottom of the annular pressure storage chamber (15) is connected to the outlet end of the valve body (1) through a fourth diversion pipe (19). When the valve controller (10) switches to the open state, the second diversion pipe (13) is in communication with the third diversion pipe (16), and the medium in the pressurizing chamber (7) enters the pressure storage chamber through the second diversion pipe (13) and the third diversion pipe (16), causing the sealing plate (6) to move upward, driving the connecting plate (3) and the baffle (2) to deflect upward, and controlling the opening of the valve body (1).

5. The straight-through plug valve according to claim 4, characterized in that: A sealing ring (17) is slidably connected in the annular pressure storage chamber (15) in the height direction. A plurality of return springs (18) are arranged in the annular pressure storage chamber (15). The top end of the return spring (18) is fixedly connected to the top of the annular pressure storage chamber (15), and its bottom end is fixedly connected to the upper surface of the sealing ring (17). After the medium in the pressurizing chamber (7) enters the annular pressure storage chamber (15), it pushes the sealing ring (17) to rise along the annular pressure storage chamber (15), and the return spring (18) is compressed. When the valve body (1) is closed again and the third diversion pipe (16) is closed, the new diversion medium enters the pressurizing chamber (7) again. Under the pressure of the return spring (18), the medium in the annular pressure storage chamber (15) enters the outlet end of the valve body (1) through the fourth diversion pipe (19).

6. The straight-through plug valve according to claim 5, wherein: A medium filtering device (20) is arranged between the pressure guiding valve (11) and the valve controller (10), and the medium filtering device (20) is connected between the first diversion pipes (12).

7. A direct-through plug valve according to claim 6, characterized in that: An angle indicator (21) is arranged on the outer surface of the valve body (1). An angle pointer (22) is rotatably connected to the surface of the angle indicator (21). One end of the hinge shaft (5) extends out of the outer surface and is connected to the angle pointer (22).

8. A direct-through plug valve according to claim 1, characterized in that: The valve body (1) is provided with an abutting edge (23) along its circumferential inner wall. When the baffle (2) is in the vertical closed state, the circumferential side of one surface of the baffle (2) abuts against the abutting edge (23).

9. The straight-through plug valve according to claim 8, characterized in that: A first inclined surface (24) is arranged on the circumferential side of the surface of the baffle (2) facing the abutting edge. A second inclined surface (25) parallel to the first inclined surface (24) is arranged on the end portion of the abutting edge (23) along its circumferential side. When the valve body (1) is in the closed state, the first inclined surface (24) on the circumferential side of the baffle (2) abuts against the second inclined surface (25) of the abutting edge.

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