Two-stage pressure regulating valve group with protective structure

Abstract

The utility model relates to the technical field of pressure regulating valve equipment, and discloses a two-stage pressure regulating valve group with a protective structure, which comprises a main pressure regulating valve, two ends of the main pressure regulating valve are fixedly communicated with connecting pipes, one end of one connecting pipe is fixedly communicated with an auxiliary pressure regulating valve, and the other end of the other connecting pipe is fixedly communicated with a protective structure. One end of the other connecting pipe and one end of the auxiliary pressure regulating valve fixedly communicate with connecting flanges, ball valves are fixedly installed on the sides, away from each other, of the two connecting flanges, and two rubber pads are installed in each ball valve. Through cooperative use of the driving shaft, the spherical shell, the rubber pad, the driving assembly and other structures, automatic control over fluid flow can be achieved through cooperation of an electric telescopic rod driving system and a rack and a gear and accurate adjustment of the opening degree of the ball valve, convenience and rapidness are achieved, manual operation is reduced, different application requirements can be met, and the application range is wide. The automation degree is high, and the precision and response speed of flow control are improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve equipment technology, and in particular to a two-stage pressure regulating valve assembly with a protective structure. Background Technology

[0002] Two-stage pressure regulating valve assemblies are widely used in gas and liquid flow control systems, especially in applications requiring precise pressure and flow regulation, such as oil, natural gas, chemical, water supply, and gas supply. Traditional pressure regulating valve assemblies typically employ a single valve body structure, offering limited regulation functionality. They suffer from complex operation, difficult maintenance, and susceptibility to valve wear, impacting system stability and lifespan.

[0003] Impurities often enter the system within pressure regulating valve assemblies, which can affect normal fluid flow and even cause valve malfunctions and damage. Traditional filtration devices are inconvenient to clean and maintain, often requiring prolonged downtime for repairs, causing unnecessary production losses. While some improvements have been made in existing technologies, problems such as insufficient adjustment precision and difficulty in cleaning the filter screen remain. Therefore, there is an urgent need for a new pressure regulating valve assembly structure that can provide more precise flow control, facilitate maintenance, and improve system stability and efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a two-stage pressure regulating valve assembly with a protective structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a two-stage pressure regulating valve assembly with a protective structure, comprising a main pressure regulating valve, both ends of which are fixedly connected to connecting pipes, one end of one connecting pipe being fixedly connected to a secondary pressure regulating valve, and one end of the other connecting pipe and one end of the secondary pressure regulating valve being fixedly connected to connecting flanges, ball valves being fixedly installed on opposite sides of the two connecting flanges, two rubber gaskets being installed inside the ball valves, the opposite sides of the two rubber gaskets being slidably connected to a spherical shell, a drive shaft being fixedly connected to the front of the spherical shell, a drive assembly capable of controlling the automatic rotation of the drive shaft being provided on the front of the ball valves, and a filter pipe being fixedly connected to one end of one of the ball valves, with a filter assembly provided on the filter pipe.

[0006] The main pressure regulating valve performs primary pressure regulation, using spring preload or valve core displacement to initially reduce the pressure of high-pressure media such as gas and liquid. It can also form redundant control with the auxiliary pressure regulating valve. When the main valve experiences pressure regulation deviation due to wear or sudden flow changes, the auxiliary valve automatically intervenes to compensate and ensure stable outlet pressure. The auxiliary pressure regulating valve performs secondary fine pressure regulation, further reducing the intermediate pressure output by the main valve to the target value. When the main valve fails, the auxiliary valve can independently undertake the full-flow pressure regulation task, preventing system shutdown. The inlet ball valve achieves initial flow control by adjusting the opening of the spherical shell from 0-90°. The outlet ball valve maintains the outlet pressure to ensure the outflow rate. The rubber gasket is made of fluororubber and fits tightly with the spherical shell to prevent media leakage. The spherical shell changes the flow channel cross-sectional area by rotation, achieving stepless adjustment. Its surface is coated with tungsten carbide to resist particle erosion.

[0007] As a further description of the above technical solution:

[0008] The drive assembly includes an electric telescopic rod fixedly mounted on the front of the ball valve via a support plate. A rack is fixedly connected to the telescopic end of the electric telescopic rod, and a guide seat is slidably connected to the top of the rack.

[0009] One side of the guide seat is fixedly connected to the ball valve.

[0010] As a further description of the above technical solution:

[0011] The bottom of the rack is engaged with a gear, and the inside of the gear is fixedly connected to the drive shaft.

[0012] The electric telescopic rod controls the extension and retraction of the rack, which in turn drives the gear to rotate, and finally controls the action of the ball valve through the drive shaft to achieve automatic adjustment.

[0013] As a further description of the above technical solution:

[0014] The filter assembly includes an installation groove inside the filter tube, and an internally threaded pipe is fixedly connected to the front of the filter tube at the installation groove. A threaded valve is threadedly connected to the inner wall of the internally threaded pipe.

[0015] The filter plate can be pulled out by rotating the threaded valve. The thread fit is highly precise, and the fluororubber gasket ensures a tight seal.

[0016] As a further description of the above technical solution:

[0017] One end of the threaded valve is rotatably connected to a filter plate, the outer wall of the filter plate is snapped into the mounting groove, and the bottom of the filter tube is fixedly connected to a drain pipe.

[0018] The filter plate inside the filter tube filters solid particles and protects the pressure regulating valve assembly from wear. The drain pipe and the feed pipe form a reverse flushing path.

[0019] As a further description of the above technical solution:

[0020] One end of the filter tube is fixedly connected to the feed pipe, and the other end of the ball valve is fixedly connected to the discharge pipe.

[0021] The feed pipe connects to the upstream high-pressure source, and the discharge pipe connects to the downstream equipment.

[0022] As a further description of the above technical solution:

[0023] A safety valve is fixedly installed on the outer wall of the connecting pipe, between the main pressure regulating valve and the auxiliary pressure regulating valve.

[0024] The safety valve is independent of the electric control system and automatically releases pressure in case of overpressure to prevent system overload.

[0025] As a further description of the above technical solution:

[0026] Pressure gauges are fixedly installed on the outer walls of both connecting pipes.

[0027] Compare the pressure before and after the main / secondary pressure regulating valves with pressure gauges to verify the pressure regulating effect.

[0028] This utility model has the following beneficial effects:

[0029] 1. Compared with existing technologies, this two-stage pressure regulating valve assembly with a protective structure, through the coordinated use of a drive shaft, a spherical shell, a rubber pad, and a drive component, can achieve automated control of fluid flow by precisely adjusting the opening of the ball valve through an electric telescopic rod drive system in conjunction with a rack and pinion. This is convenient, quick, reduces manual operation, can meet different application needs, has a high degree of automation, and improves the accuracy and response speed of flow control.

[0030] 2. Compared with existing technologies, this two-stage pressure regulating valve assembly with protective structure, through the combined use of filter pipes, mounting grooves, internal threaded pipes and threaded valves, can effectively intercept solid particles, rust and other impurities through the internal filter plate, preventing these impurities from causing wear or blockage to valves and other equipment, thereby extending the service life of the equipment and improving the reliability of the system, playing a good protective role. In addition, the drain pipe design facilitates regular system cleaning, and the connection of backwashing media such as cleaning gas can quickly clean the filter plate and pipes, avoiding blockage problems. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a two-stage pressure regulating valve assembly with a protective structure proposed in this utility model;

[0032] Figure 2This is a three-dimensional schematic diagram of the overall structure of a two-stage pressure regulating valve assembly with a protective structure proposed in this utility model from another perspective.

[0033] Figure 3 This is a three-dimensional schematic diagram of the guide seat and threaded valve structure of a two-stage pressure regulating valve assembly with a protective structure proposed in this utility model.

[0034] Figure 4 This is a partial cross-sectional three-dimensional schematic diagram of a ball valve with a protective structure for a two-stage pressure regulating valve assembly proposed in this utility model;

[0035] Figure 5 This is a partial cross-sectional three-dimensional schematic diagram of the connecting pipe of a two-stage pressure regulating valve assembly with a protective structure proposed in this utility model.

[0036] Legend:

[0037] 1. Main pressure regulating valve; 2. Connecting pipe; 3. Secondary pressure regulating valve; 4. Connecting flange; 5. Ball valve; 6. Pressure gauge; 7. Rubber gasket; 8. Spherical shell; 9. Drive shaft; 10. Filter pipe; 11. Electric telescopic rod; 12. Rack; 13. Guide seat; 14. Gear; 15. Mounting groove; 16. Internal threaded pipe; 17. Threaded valve; 18. Filter plate; 19. Drain pipe; 20. Feed pipe; 21. Discharge pipe; 22. Safety valve. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1-5This utility model provides a two-stage pressure regulating valve assembly with a protective structure: It includes a main pressure regulating valve 1, with connecting pipes 2 fixedly connected to both ends of the main pressure regulating valve 1. One end of one connecting pipe 2 is fixedly connected to a secondary pressure regulating valve 3, and both ends of the other connecting pipe 2 and the secondary pressure regulating valve 3 are fixedly connected to connecting flanges 4. Ball valves 5 are fixedly installed on opposite sides of the two connecting flanges 4. Two rubber gaskets 7 are installed inside the ball valve 5, and the opposite sides of the two rubber gaskets 7 are slidably connected to a spherical shell 8. A drive shaft 9 is fixedly connected to the front of the spherical shell 8. A drive assembly capable of controlling the automatic rotation of the drive shaft 9 is provided on the front of the ball valve 5. One end of one ball valve 5 is fixedly connected to a filter pipe 10, and a filter assembly is provided on the filter pipe 10. The main pressure regulating valve 1 performs the primary pressure regulating function, initially reducing the pressure of high-pressure media such as gas or liquid through spring preload or valve core displacement, and can form redundant control with the secondary pressure regulating valve 3. When the main valve experiences pressure regulation deviation due to wear or sudden flow changes, the secondary valve... The valve automatically intervenes to compensate, ensuring stable outlet pressure. The auxiliary pressure regulating valve 3 performs two-stage fine pressure regulation, further reducing the intermediate pressure output by the main valve to the target value. When the main valve fails, the auxiliary valve can independently undertake the full-flow pressure regulation task, preventing system shutdown. The inlet ball valve 5 achieves initial flow control by adjusting the opening of the spherical shell 8 from 0-90°. The outlet ball valve 5 maintains the outlet pressure to ensure the outflow speed. The rubber pad 7 is made of fluororubber and fits tightly with the spherical shell 8 to prevent media leakage. The spherical shell 8 achieves stepless adjustment by changing the cross-sectional area of ​​the flow channel through rotation. Its surface is coated with tungsten carbide to resist particle erosion. Through the coordinated use of the drive shaft 9, spherical shell 8, rubber pad 7, and drive components, the system can be driven by the electric telescopic rod 11 to cooperate with the rack and pinion 12 and gear 14. By precisely adjusting the opening of the ball valve 5, the automatic control of fluid flow can be achieved. This is convenient and quick, reduces manual operation, meets different application needs, has a high degree of automation, and improves the accuracy and response speed of flow control.

[0040] The drive assembly includes an electric telescopic rod 11 fixedly mounted on the front of the ball valve 5 via a support plate. A rack 12 is fixedly connected to the telescopic end of the electric telescopic rod 11. A guide seat 13 is slidably connected to the top of the rack 12. One side of the guide seat 13 is fixedly connected to the ball valve 5. A gear 14 is meshed with the bottom of the rack 12. The inside of the gear 14 is fixedly connected to the drive shaft 9. The electric telescopic rod 11 controls the extension and retraction of the rack 12, thereby driving the gear 14 to rotate. Finally, the drive shaft 9 controls the action of the ball valve 5 to achieve automatic adjustment.

[0041] The filter assembly includes an installation groove 15 inside the filter tube 10. An internally threaded tube 16 is fixedly connected to the front of the filter tube 10 and located in the installation groove 15. A threaded valve 17 is threadedly connected to the inner wall of the internally threaded tube 16. The filter plate 18 can be pulled out by rotating the threaded valve 17. The thread fit is highly precise, and seven fluororubber gaskets are used to ensure a tight seal. One end of the threaded valve 17 is rotatably connected to the filter plate 18. The outer wall of the filter plate 18 is snapped into the installation groove 15. A drain pipe 19 is fixedly connected to the bottom of the filter tube 10. The filter plate 18 inside the filter tube 10 filters solid particles and protects the pressure regulating valve assembly from wear. The drain pipe 19 and the feed pipe 20 form a reverse flushing path.

[0042] One end of the filter tube 10 is fixedly connected to the feed pipe 20, and one end of the other ball valve 5 is fixedly connected to the discharge pipe 21. The feed pipe 20 is connected to the upstream high pressure source, and the discharge pipe 21 is connected to the downstream equipment. A safety valve 22 is fixedly installed on the outer wall of the connecting pipe 2 between the main pressure regulating valve 1 and the auxiliary pressure regulating valve 3. The safety valve 22 is independent of the electric control system and automatically releases pressure when there is overpressure to prevent the system from overloading.

[0043] Pressure gauges 6 are fixedly installed on the outer walls of both connecting pipes 2. The pressure gauges 6 compare the pressure before and after the main / auxiliary pressure regulating valves 3 to verify the pressure regulating effect.

[0044] Working principle: First, the medium is connected to the inlet pipe 20 and then enters the filter pipe 10. It is filtered by the filter plate 18 inside the filter pipe 10, which intercepts solid particles, rust, and other impurities, preventing wear or blockage of valves and other equipment. When enough impurities accumulate on the filter plate 18, the inlet ball valve 5 is closed. Then, the electric telescopic rod 11 is activated, causing its telescopic end to move the rack 12, which in turn rotates the gear 14. This, in turn, rotates the drive shaft 9 fixed to the gear 14, thereby rotating the spherical shell 8 inside the ball valve 5. This allows for automatic cutting off or control of fluid entry as needed, ensuring initial regulation of the fluid flow. When the inlet... When the ball valve 5 is closed, turning the valve of the drain pipe 19 will open the drain pipe 19, allowing the backwashing medium flow, such as clean gas introduced from the outlet, to clean the pipe from the filter plate 18 to the inlet. When the filter plate 18 needs to be replaced, simply rotate the threaded valve 17 to disengage it from the threaded connection of the threaded valve 17 to the internal threaded pipe 16. As the threaded valve 17 rotates, the filter plate 18 will move synchronously from the mounting groove 15. Once the threaded connection with the internal threaded pipe 16 is completely disengaged, the filter plate 18 can be removed. After replacing the filter plate 18 with one of different aperture sizes, simply align the filter plate 18 with the mounting groove 15 and tighten the threaded valve 17 completely to easily complete the replacement and installation, making it convenient to use.

[0045] Then, the medium passing through the inlet ball valve 5 enters the main pressure regulating valve 1 after passing through the first pressure gauge 6. After the pressure is regulated by the main pressure regulating valve 1, the medium enters the second pressure gauge 6 through the connecting pipe 2. At this time, after the pressure is regulated by the auxiliary pressure regulating valve 3, the medium can finally pass through the outlet ball valve 5 and be discharged from the discharge pipe 21. The main function of the outlet ball valve 5 is to control the final flow rate and outlet pressure of the fluid, ensuring that the flow rate of the entire system is stable and meets the design requirements. Similar to the inlet ball valve 5, the electric telescopic rod 11 drives the rack 12 to rotate the spherical shell 8, thereby controlling the size of the orifice that blocks the medium, thus facilitating use.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-stage pressure regulating valve assembly with a protective structure, comprising a main pressure regulating valve (1), characterized in that: Both ends of the main pressure regulating valve (1) are fixedly connected to connecting pipes (2). One end of one connecting pipe (2) is fixedly connected to a secondary pressure regulating valve (3). One end of the other connecting pipe (2) and one end of the secondary pressure regulating valve (3) are fixedly connected to connecting flanges (4). Ball valves (5) are fixedly installed on the opposite sides of the two connecting flanges (4). Two rubber pads (7) are installed inside the ball valve (5). The opposite sides of the two rubber pads (7) are slidably connected to a spherical shell (8). A drive shaft (9) is fixedly connected to the front of the spherical shell (8). A drive assembly capable of controlling the automatic rotation of the drive shaft (9) is provided on the front of the ball valve (5). One end of one ball valve (5) is fixedly connected to a filter pipe (10). A filter assembly is provided on the filter pipe (10).

2. The two-stage pressure regulating valve assembly with a protective structure according to claim 1, characterized in that: The drive assembly includes an electric telescopic rod (11) fixedly mounted on the front of the ball valve (5) via a support plate. The telescopic end of the electric telescopic rod (11) is fixedly connected to a rack (12), and the top of the rack (12) is slidably connected to a guide seat (13).

3. A two-stage pressure regulating valve assembly with a protective structure according to claim 2, characterized in that: The bottom of the rack (12) is meshed with a gear (14), and the inside of the gear (14) is fixedly connected to the drive shaft (9).

4. A two-stage pressure regulating valve assembly with a protective structure according to claim 1, characterized in that: The filter assembly includes an installation groove (15) inside the filter tube (10), and an internally threaded tube (16) is fixedly connected to the front of the filter tube (10) and located at the installation groove (15). A threaded valve (17) is threadedly connected to the inner wall of the internally threaded tube (16).

5. A two-stage pressure regulating valve assembly with a protective structure according to claim 4, characterized in that: One end of the threaded valve (17) is rotatably connected to a filter plate (18), the outer wall of the filter plate (18) is snapped into the mounting groove (15), and the bottom of the filter pipe (10) is fixedly connected to a drain pipe (19).

6. A two-stage pressure regulating valve assembly with a protective structure according to claim 1, characterized in that: One end of the filter tube (10) is fixedly connected to the feed pipe (20), and the other end of the ball valve (5) is fixedly connected to the discharge pipe (21).

7. A two-stage pressure regulating valve assembly with a protective structure according to claim 1, characterized in that: A safety valve (22) is fixedly installed on the outer wall of the connecting pipe (2) between the main pressure regulating valve (1) and the auxiliary pressure regulating valve (3).

8. A two-stage pressure regulating valve assembly with a protective structure according to claim 1, characterized in that: Pressure gauges (6) are fixedly installed on the outer walls of both connecting pipes (2).

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