A power source-free actuator for a valve and a plug valve using the same

Abstract

The utility model discloses a kind of unpowered actuator for valve and plug valve applying the actuator, it is related to invention technical field.Its technical scheme main point is: including valve controller, the valve controller is connected with pressure guiding valve by first flow pipe, the pressure guiding valve is connected in the positive pressure end of pipeline, second flow pipe is also provided on the valve controller;When opening pressure guiding valve, the valve controller controls first flow pipe and second flow pipe conduction, and pressure medium in the positive pressure end of pipeline enters into second flow pipe through pressure guiding valve and first flow pipe, and finally enters into valve and provides power source, to control valve opening and closing using the positive pressure in pipeline.The utility model aims at providing a kind of unpowered actuator for valve and plug valve applying the actuator.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a powerless actuator for valves and a plug valve using the actuator. Background Technology

[0002] In industrial pipeline systems, valves are the core components of fluid control, and their sealing performance, durability, and ease of maintenance directly affect the system's operating efficiency and safety. Traditional valves (such as plug valves, ball valves, and gate valves) typically employ a fixed valve core structure, where the valve core and valve body achieve opening and closing functions through rotation or lifting movements.

[0003] Existing valves require actuators to open and close, including electric actuators, pneumatic actuators, and mechanical reducers, etc. However, the actuators for this type of high-pressure ball valve result in higher production costs.

[0004] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a powerless actuator for valves and a plug valve using the actuator.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a powerless actuator for valves, including a valve controller, wherein the valve controller is connected to a pressure-feeding valve through a first guide pipe, the pressure-feeding valve is connected to the positive pressure end of the pipeline, and a second guide pipe is also provided on the valve controller;

[0007] When the pressure tapping valve is opened, the valve controller controls the first guide pipe and the second guide pipe to be connected. The pressure medium at the positive pressure end of the pipeline enters the second guide pipe through the pressure tapping valve and the first guide pipe, and finally enters the valve and provides a power source, so as to use the positive pressure in the pipeline to control the opening and closing of the valve.

[0008] The present invention is further configured such that a filter device is provided between the pressure valve and the valve controller.

[0009] A plug valve includes a valve body, a guide sleeve communicating with the valve body at its top, a movable plug assembly within the valve body, the movable plug assembly including a baffle, a connecting plate perpendicular to the baffle on the side surface of the baffle facing the inlet end of the valve body, the top of the connecting plate being hinged to the inner wall of the guide sleeve near the outlet end of the valve body via a hinge shaft, the top of the guide sleeve being sealed and a guide plate being slidably connected in the vertical direction inside the guide sleeve, the upper surface of the guide plate forming a pressure chamber with the internal space of the guide sleeve, a connecting rod being provided at the bottom of the guide plate, a hinge rod hinged to the bottom end of the connecting rod, the bottom end of the hinge rod being hinged to the connecting plate, and a second guide tube connected to the top of the guide sleeve and communicating with the pressure chamber.

[0010] The present invention is further configured such that: a sealing cover is provided on the circumferential side surface of the guide sleeve, and a sealed annular pressure storage cavity is formed between the sealing cover and the guide sleeve; the valve controller is also connected to the bottom of the annular pressure storage cavity through a third guide pipe, and the bottom of the annular pressure storage cavity is connected to the outlet end of the valve body through a fourth guide pipe.

[0011] The present invention is further configured such that: a sealing ring is slidably connected in the annular pressure storage cavity along the height direction; a plurality of return springs are provided 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 its bottom end is fixedly connected to the upper surface of the sealing ring; under the action of the return spring, the bottom of the sealing ring abuts against the bottom of the annular pressure storage cavity.

[0012] The present invention is further configured such that: the valve body is provided with an abutment edge along its circumferential inner wall, and when the baffle is in the vertically closed state, the circumferential side of one side surface of the baffle abuts against the abutment edge.

[0013] The present invention is further configured such that: a first inclined surface is provided on the periphery of the surface of the baffle facing the abutment edge, and a second inclined surface parallel to the first inclined surface is provided on the periphery of the end of the abutment edge; when the valve body is in the closed state, the first inclined surface on the periphery of the baffle abuts against the second inclined surface of the abutment edge.

[0014] The present invention has the following advantages: When the pressure tapping valve is opened, the valve controller controls the first guide pipe and the second guide pipe to be connected. The pressure medium at the positive pressure end of the pipeline enters the valve through the pressure tapping valve, the first guide pipe and the second guide pipe and provides a power source. The positive pressure in the pipeline is used to control the opening and closing of the valve. There is no need for an actuator with a power source to provide power for the opening and closing of the valve, thereby reducing production costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of specific embodiment 1;

[0016] Figure 2 This is a three-dimensional structural diagram of specific embodiment 2;

[0017] Figure 3 This is another three-dimensional structural schematic diagram of specific embodiment 2;

[0018] Figure 4 This is a schematic diagram of a half-section structure of specific embodiment 2;

[0019] Figure 5 This is a schematic diagram of the movable plug assembly in specific embodiment 2;

[0020] Figure 6 for Figure 4 A magnified view of part A in the middle.

[0021] Figure descriptions: 1. Valve controller; 2. First guide pipe; 3. Pressure tapping valve; 4. Second guide pipe; 5. Valve body; 6. Guide sleeve; 7. Baffle; 8. Connecting plate; 9. Guide plate; 10. Pressurization chamber; 11. Connecting rod; 12. Hinge shaft; 13. Hinge rod; 14. Sealing cover; 15. Annular pressure storage chamber; 16. Third guide pipe; 17. Fourth guide pipe; 18. Sealing ring; 19. Return spring; 20. Abutment edge; 21. First inclined surface; 22. Second inclined surface; 23. Filter device. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively. Specific Implementation Example 1:

[0025] As shown in the figure, a powerless actuator for valves includes a valve controller 1. The valve controller 1 is connected to a pressure valve 3 via a first guide pipe 2. The pressure valve 3 is connected to the positive pressure end of the pipeline. The valve controller 1 is also provided with a second guide pipe 4, which is connected to the valve. (The valve controller 1 can control the opening and closing of each port. Its internal structure and control method are existing technologies and will not be described in detail in this embodiment.)

[0026] When the pressure tapping valve 3 is opened, the valve controller 1 controls the first guide pipe 2 and the second guide pipe 4 to be connected. The pressure medium at the positive pressure end of the pipeline enters the valve through the pressure tapping valve 3, the first guide pipe 2, and the second guide pipe 4 and provides a power source. The positive pressure in the pipeline is used to control the opening and closing of the valve. There is no need for an actuator with a power source to provide power for the valve to open and close, thereby reducing production costs.

[0027] A filter device 23 is also provided between the pressure valve 3 and the valve controller 1. The medium in the pipeline enters the valve controller 1 through the pressure valve 3 and is filtered by the filter device 23. The filter device 23 can be selected according to different media. The filter device 23 is existing technology and will not be described in detail in this embodiment. Specific Implementation Example 2:

[0029] A plug valve includes a valve body 5, a guide sleeve 6 connected to the top of the valve body 5, a pressure valve 3 connected to the inlet end of the valve body 5, a movable plug assembly inside the valve body 5, the movable plug assembly including a baffle 7, a connecting plate 8 perpendicular to the baffle 7 on the side surface of the baffle 7 facing the inlet end of the valve body 5, the top of the connecting plate 8 being hinged to the inner wall of the guide sleeve 6 near the outlet end of the valve body 5 via a hinge shaft 12, the top of the guide sleeve 6 being sealed and a guide plate 9 being slidably connected in the vertical direction inside the guide sleeve 6, the upper surface of the guide plate 9 and the internal space of the guide sleeve 6 forming a sealed pressure chamber 10, a connecting rod 11 being provided at the bottom of the guide plate 9, a hinge rod 13 being hinged to the bottom end of the connecting rod 11, the bottom end of the hinge rod 13 being hinged to the connecting plate 8, and a second guide pipe 4 being connected to the top of the guide sleeve 6 and connected to the pressure chamber 10.

[0030] When the valve body 5 is in the closed state, the valve controller 1 controls the first guide pipe 2 and the second guide pipe 4 to be connected. The medium at the inlet end of the valve body 5 enters the first guide pipe 2 through the pressure valve 3, and enters the pressurization chamber 10 through the valve controller 1 and the second guide pipe 4, thereby pushing the guide plate 9 to move downward, thereby pushing the connecting plate 8 and the baffle 7 to deflect downward, so that the baffle 7 blocks and closes the interior of the valve body 5.

[0031] A sealing cover 14 is provided on the circumferential side surface of the guide sleeve 6, and a sealed annular pressure storage cavity 15 is formed between the sealing cover 14 and the guide sleeve 6. The valve controller 1 is also connected to the bottom of the annular pressure storage cavity 15 through a third guide pipe 16, and the bottom of the annular pressure storage cavity 15 is connected to the outlet end of the valve body 5 through a fourth guide pipe 17.

[0032] When valve controller 1 switches to the open state, the first guide pipe 2 closes, and the second guide pipe 4 and the third guide pipe 16 are connected. Since the pressure in the pressurization chamber 10 is greater than the pressure at the outlet end of the valve body 5, the pressure in the pressurization chamber 10 is greater than the pressure in the annular pressure storage chamber 15. The pressure in the pressurization chamber 10 enters the annular pressure storage chamber 15 through the second guide pipe 4 and the third guide pipe 16. The medium pressure in the pressurization chamber 10 decreases, causing the sealing plate to move upward, which drives the connecting plate 8 and the baffle 7 to deflect upward, thus controlling the valve body 5 to open.

[0033] A sealing ring 18 is slidably connected in the height direction inside the annular pressure storage cavity 15. Several return springs 19 are provided inside the annular pressure storage cavity 15. The top end of the return spring 19 is fixedly connected to the top of the annular pressure storage cavity 15, and its bottom end is fixedly connected to the upper surface of the sealing ring 18. Under the elastic force of the return spring 19, the bottom of the sealing ring 18 abuts against the bottom of the annular pressure storage cavity 15.

[0034] When the pressure in the pressurizing chamber 10 enters the annular pressure storage chamber 15 through the second guide pipe 4 and the third guide pipe 16, the sealing ring 18 rises along the annular pressure storage chamber 15, and the return spring 19 is compressed. When the valve body 5 is closed again and the third guide pipe 16 is closed, the first guide pipe 2 and the second guide pipe 4 are connected, and the new guide medium enters the pressurizing chamber 10 again. Under the pressure of the return spring 19, the medium in the annular pressure storage chamber 15 enters the outlet end of the valve body 5 through the fourth guide pipe 17.

[0035] The valve body 5 has an abutment edge 20 along its inner circumference. When the baffle 7 is in the vertical closed state, the circumference of one side surface of the baffle 7 abuts against the abutment edge 20. The circumference of the side surface of the baffle 7 facing the abutment edge 20 has a first inclined surface 21. The end of the abutment edge 20 has a second inclined surface 22 parallel to the first inclined surface 21 along its circumference. When the valve body 5 is in the closed state, the first inclined surface 21 of the baffle 7 abuts against the second inclined surface 22 of the abutment edge 20 to ensure the sealing performance of the valve body 5 when it is in the closed state.

[0036] The specific embodiments are merely explanations of this utility model and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this utility model.

Claims

1. A power-free actuator for valves, characterized in that: Includes a valve controller (1), which is connected to a pressure valve (3) via a first guide pipe (2), the pressure valve (3) being connected to the positive pressure end of the pipeline, and a second guide pipe (4) is also provided on the valve controller (1). When the pressure valve (3) is opened, the valve controller (1) controls the first guide pipe (2) and the second guide pipe (4) to be connected. The pressure medium at the positive pressure end of the pipeline enters the second guide pipe (4) through the pressure valve (3) and the first guide pipe (2), and finally enters the valve and provides a power source so as to use the positive pressure in the pipeline to control the opening and closing of the valve.

2. The powerless actuator for valves according to claim 1, characterized in that: A filter device (23) is also provided between the pressure valve (3) and the valve controller (1).

3. A plug valve using the actuator of claim 1 or 2, characterized in that: The system includes a valve body (5), a guide sleeve (6) connected to the valve body (5) at its top, a movable plug assembly inside the valve body (5), a baffle (7), and a connecting plate (8) perpendicular to the baffle (7) on the side of the baffle (7) facing the inlet end of the valve body (5). The top of the connecting plate (8) is hinged to the inner wall of the guide sleeve (6) near the outlet end of the valve body (5) via a hinge shaft. The top of the sleeve (6) is sealed and a guide plate (9) is slidably connected to it in the vertical direction. The upper surface of the guide plate (9) and the internal space of the guide sleeve (6) form a pressurizing cavity (10). A connecting rod (11) is provided at the bottom of the guide plate (9). A hinge rod (13) is hinged to the bottom end of the connecting rod (11). The bottom end of the hinge rod (13) is hinged to the connecting plate (8). The second guide tube (4) is connected to the top of the guide sleeve (6) and communicates with the pressurizing cavity (10).

4. A plug valve according to claim 3, characterized in that: The guide sleeve (6) is provided with a sealing cover (14) along its circumferential side surface. A sealed annular pressure storage cavity (15) is formed between the sealing cover (14) and the guide sleeve (6). The valve controller (1) is also connected to the bottom of the annular pressure storage cavity (15) through a third guide pipe (16). The bottom of the annular pressure storage cavity (15) is connected to the outlet end of the valve body (5) through a fourth guide pipe (17).

5. A plug valve according to claim 4, characterized in that: A sealing ring (18) is slidably connected in the height direction inside the annular pressure storage cavity (15). Several return springs (19) are provided inside the annular pressure storage cavity (15). The top end of the return spring (19) is fixedly connected to the top of the annular pressure storage cavity (15), and its bottom end is fixedly connected to the upper surface of the sealing ring (18). Under the elastic force of the return spring (19), the bottom of the sealing ring (18) abuts against the bottom of the annular pressure storage cavity (15).

6. A plug valve according to claim 5, characterized in that: The valve body (5) has an abutment edge (20) along its circumferential inner wall. When the baffle (7) is in the vertical closed state, the circumferential side of one side surface of the baffle (7) abuts against the abutment edge (20).

7. A plug valve according to claim 6, characterized in that: The baffle (7) has a first inclined surface (21) on the periphery of the surface facing the abutment edge (20), and the end of the abutment edge (20) has a second inclined surface (22) parallel to the first inclined surface (21) along its periphery. When the valve body (5) is in the closed state, the first inclined surface (21) on the periphery of the baffle (7) abuts against the second inclined surface (22) of the abutment edge (20).

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