Low resistance forged steel check valve

Abstract

The application relates to the technical field of check valves, in particular to a low-resistance forged steel check valve. The low-resistance forged steel check valve is provided with a screw rod type pressure regulating assembly driven by a motor, can electrically and accurately regulate the acting force of a spring on a linkage assembly and a valve plate, and can dynamically set and change the opening pressure threshold value of the valve. The design makes the check valve actively adapt to different pipeline system pressure working conditions and flow requirements, instead of only having a fixed response value like a traditional check valve, and the intelligent degree is high; the low-resistance smooth opening under normal low pressure can be ensured; the overall structure is compact and reasonable; and through detachable connection design of a top cover, when internal core components such as the motor and the pressure regulating assembly are maintained or overhauled, the entire valve does not need to be detached from the pipeline, and only the top cover needs to be detached, so that the daily maintenance and care of the equipment are greatly facilitated, and the difficulty and cost of later operation and maintenance are reduced.

Description

Technical Field

[0001] This application relates to the technical field of check valves, and in particular to a low-resistance forged steel check valve. Background Technology

[0002] A forged steel check valve is a type of valve used to prevent fluid backflow. Its core function is to determine the direction of fluid flow and protect other fluid machinery and pipelines by stopping fluid backflow.

[0003] The opening pressure of a forged steel check valve (i.e., the inlet pressure required for the valve disc to begin opening) is fixed by the spring preload or the weight of the valve disc during valve installation, becoming a constant value that cannot be adjusted.

[0004] This fixed opening pressure setting proves inadequate for modern fluid systems with complex and variable operating conditions, often leading to a series of problems. On the one hand, if valves with higher opening pressures are selected to avoid water hammer, they may experience high flow resistance due to difficulty in opening or insufficient opening during normal low-pressure startup or low-flow operation, resulting in unnecessary energy loss and contradicting the design intent of energy conservation and consumption reduction. On the other hand, if valves with lower opening pressures are selected to pursue low flow resistance, the valve disc may experience slow response or incomplete closure due to insufficient closing driving force when the system pressure fluctuates significantly or backflow occurs due to pump shutdown, potentially even triggering severe water hammer, impacting pipelines, pumps, and other equipment, and creating safety hazards. Utility Model Content

[0005] To address the problems mentioned in the background section, this application provides a low-resistance forged steel check valve.

[0006] This application provides a low-resistance forged steel check valve, which adopts the following technical solution: it includes a valve body, a support shaft that extends through to the other side is fixedly connected to one side of the outer surface of the valve body, a valve plate is rotatably sleeved on the support shaft in the inner region of the valve body, and a pressure measuring component is installed on the valve plate at the liquid inlet end;

[0007] The top of the valve body is detachably fixedly connected to a top cover. The bottom of the top cover and the top of the valve body are provided with a mounting groove. A motor is fixedly connected to the bottom of the mounting groove. A screw-type pressure regulating assembly is installed between the motor and the valve body.

[0008] A spring is fixedly connected to the movable end of the screw-type pressure regulating assembly, and a linkage assembly is fixedly connected to the bottom of the spring. The linkage assembly is connected to the valve plate.

[0009] Optionally, the pressure measuring assembly includes a pressure sensor, and the mounting end of the pressure sensor is fixedly embedded in one side of the outer wall of the valve plate. The detection end of the pressure sensor is fixedly connected to a pressure measuring plate, and the pressure measuring plate is sealed and slidably embedded in one side of the outer wall of the valve plate.

[0010] Optionally, the screw-type pressure regulating assembly includes a screw body, which is fixedly connected to the drive shaft of the motor and extends through the bottom wall of the mounting groove into the valve body. The screw body is rotatably connected to the valve body, and a movable plate is threaded onto the outer surface of the screw body, which is slidably connected to the inner wall of the valve body.

[0011] Optionally, the linkage component includes a slide block, which is fixedly installed at the bottom of the spring and slidably connected to the inner wall of the valve body. Both outer walls of the slide block are rotatably connected to connecting rods, and the bottoms of the two connecting rods are rotatably connected to a slider.

[0012] Optionally, a slide rail is slidably connected to one side of the outer surface of the slider, and the slide rail is fixedly connected to the valve plate.

[0013] Optionally, the top cover and the valve body are fixed together by multiple bolts.

[0014] Optionally, a controller is fixedly connected to the top of the top cover, and the controller is electrically connected to the motor and the pressure sensor.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] This invention utilizes a motor-driven screw-type pressure regulating component to electrically and precisely adjust the force exerted by the spring on the linkage component and valve plate, thereby dynamically setting and changing the valve's opening pressure threshold. This design allows the check valve to proactively adapt to different pipeline system pressure conditions and flow requirements, rather than relying on a fixed response value like traditional check valves. It boasts a high degree of intelligence, ensuring smooth opening with low resistance under normal low pressure conditions, and enhancing the stability of the closing element by increasing the opening pressure during system pressure fluctuations (such as before water hammer occurs), effectively suppressing water hammer hazards and improving system safety and adaptability.

[0017] The overall structure of this utility model is compact and reasonable. Moreover, the detachable connection design of the top cover makes it possible to maintain or repair internal core components such as motors and pressure regulating components without removing the entire valve from the pipeline. Only the top cover needs to be removed, which greatly facilitates the daily maintenance and upkeep of the equipment and reduces the difficulty and cost of later operation and maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure in an embodiment of this application;

[0020] Figure 3 This is an embodiment of the present application. Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is an embodiment of the present application. Figure 2 Enlarged view of point B in the middle.

[0022] Reference numerals in the attached diagram: 1. Valve body; 2. Top cover; 3. Controller; 4. Slide; 5. Connecting rod; 6. Slider; 7. Valve plate; 8. Support shaft; 9. Motor; 10. Mounting groove; 11. Screw body; 12. Spring; 13. Movable plate; 14. Pressure measuring plate; 15. Pressure sensor; 16. Slide rail. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1 to 4 This application will be described in further detail.

[0024] This application discloses a low-resistance forged steel check valve. For example... Figure 2 and Figure 4 As shown, the valve includes a valve body 1. A support shaft 8, extending through to the other side, is fixedly connected to one side of the outer surface of the valve body 1. A valve plate 7 is rotatably sleeved on the support shaft 8 in the inner region of the valve body 1. A pressure sensing assembly is installed on the valve plate 7 at the inlet end. The pressure sensing assembly includes a pressure sensor 15, which is a VLC-VU93 model. The mounting end of the pressure sensor 15 is fixedly embedded in the outer wall of one side of the valve plate 7. A pressure sensing plate 14 is fixedly connected to the detection end of the pressure sensor 15. The pressure sensing plate 14 is slidably fitted into the outer wall of one side of the valve plate 7, allowing the pressure sensing plate 14 to directly and accurately sense the fluid pressure change at the inlet end and transmit the pressure signal to the pressure sensor 15 in real time. This provides an accurate data basis for the intelligent control of the valve, ensuring response speed and control accuracy. A sealing gasket is fixedly sleeved on the outer surface of the pressure sensing plate 14, and the sealing gasket abuts against the valve plate 7 to ensure the sealing between the pressure sensing plate 14 and the valve plate 7.

[0025] Please see Figure 1 , Figure 2 and Figure 3A top cover 2 is detachably fixedly connected to the top of the valve body 1. A mounting groove 10 is formed between the bottom of the top cover 2 and the top of the valve body 1. A motor 9 is fixedly connected to the bottom of the mounting groove 10. A screw-type pressure regulating assembly is installed between the motor 9 and the valve body 1. The screw-type pressure regulating assembly includes a screw body 11, which is fixedly connected to the drive shaft of the motor 9 and extends through the bottom wall of the mounting groove 10 into the valve body 1. The screw body 11 is rotatably connected to the valve body 1. A movable plate 13 is threaded onto the outer surface of the screw body 11 and is slidably connected to the inner wall of the valve body 1. By utilizing the high precision and self-locking characteristics of the screw drive, the rotational motion of the motor 9 can be accurately converted into the linear displacement of the movable plate 13, thereby achieving stepless, stable and reliable electric adjustment of the preload of the spring 12.

[0026] Please see Figure 2 and Figure 4 A spring 12 is fixedly connected to the movable end of the screw-type pressure regulating component. A linkage component is fixedly connected to the bottom of the spring 12. The linkage component is connected to the valve plate 7. The linkage component includes a slide 4, which is fixedly installed at the bottom of the spring 12 and slidably connected to the inner wall of the valve body 1. Connecting rods 5 are rotatably connected to the outer walls on both sides of the slide 4. A slider 6 is rotatably connected to the bottom of the two connecting rods 5. A slide rail 16 is slidably connected to one side of the outer surface of the slider 6, and the slide rail 16 is fixedly connected to the valve plate 7. The linkage component constitutes a stable force transmission mechanism that can efficiently convert the linear force of the spring 12 into a torque that drives the valve plate 7 to rotate. The matching design of the slide rail 16 and the slider 6 ensures that the valve plate 7 moves in a coordinated manner with the linkage mechanism during opening and closing, and avoids jamming.

[0027] Please see Figure 1 The top cover 2 is fixed to the valve body 1 by multiple bolts, and the bolt connection provides a strong seal and fixation.

[0028] Please see Figure 1 , Figure 3 and Figure 4 The top of the top cover 2 is fixedly connected to the controller 3, and the controller 3 is electrically connected to the motor 9 and the pressure sensor 15. The controller 3, as the "brain" of the entire valve, receives sensor signals and controls the motor 9 to move, realizing closed-loop control that automatically adjusts the working characteristics of the valve according to the real-time working conditions.

[0029] The implementation principle of a low-resistance forged steel check valve according to an embodiment of this application is as follows: When fluid flows in from the inlet end of the valve body 1, the pressure of the fluid acts directly on the pressure measuring plate 14 of the pressure measuring assembly. The pressure measuring plate 14 transmits the sensed pressure to the pressure sensor 15, and the pressure sensor 15 converts the real-time pressure signal into an electrical signal and transmits it to the controller 3.

[0030] The controller 3 has a preset pressure threshold, either programmed or user-defined. The controller 3 receives and processes signals from the pressure sensor 15, comparing them with the set values. When a change in inlet pressure is detected or the response sensitivity of the valve plate 7 needs adjustment, the controller 3 sends a command to the motor 9.

[0031] Motor 9 starts, driving the screw body 11 of the screw-type pressure regulating assembly to rotate. The movable plate 13, threadedly engaged with the screw body 11, moves upward or downward along the axis of the screw body 11. The movement of the movable plate 13 compresses or releases the spring 12, directly changing the preload of the spring 12. The magnitude of the preload of the spring 12 determines the minimum fluid pressure required for the valve plate 7 to open, i.e., the opening pressure threshold. The pressure regulating process is precise and controllable, achieving electric adjustment of the valve's operating characteristics.

[0032] The preload at the end of spring 12 is transmitted to valve plate 7 via a linkage assembly. The lower end of spring 12 pushes slide 4 to move, and slide 4 pushes slider 6 along slide rail 16 fixed on valve plate 7 via connecting rods 5 at both ends. This linkage mechanism converts the vertical force of spring 12 into an effective torque for the rotation of valve plate 7.

[0033] When the inlet fluid pressure exceeds the preset opening pressure threshold of spring 12, the torque generated by the fluid thrust on valve plate 7 will be greater than the closing torque generated by spring 12 on valve plate 7 through the linkage component. Valve plate 7 rotates smoothly around support shaft 8 to open, allowing fluid to pass through with minimal resistance loss.

[0034] When the inlet pressure drops or the outlet pressure is higher than the inlet pressure (resulting in a backflow trend), the fluid thrust decreases or reverses. The closing torque generated by the spring 12 through the linkage assembly will cause the valve plate 7 to close quickly, cutting off the flow path and preventing the medium from flowing back.

[0035] By setting an appropriate pressure threshold using controller 3, when the pipeline pressure rises abnormally (such as when water hammer occurs), the valve plate 7 can respond more sensitively by adjusting the preload of spring 12, or the water hammer impact can be mitigated by buffering closure.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-resistance forged steel check valve, comprising a valve body (1), characterized in that: A support shaft (8) is fixedly connected to one side of the outer surface of the valve body (1) and extends to the other side. The support shaft (8) is rotatably sleeved with a valve plate (7) in the inner area of ​​the valve body (1). A pressure measuring component is installed on the valve plate (7) at the liquid inlet end. The top of the valve body (1) is detachably fixedly connected to a top cover (2). The bottom of the top cover (2) and the top of the valve body (1) are provided with a common mounting groove (10). The bottom of the mounting groove (10) is fixedly connected to a motor (9). The motor (9) and the valve body (1) are jointly installed with a screw-type pressure regulating assembly. The movable end of the screw-type pressure regulating component is fixedly connected to a spring (12), and the bottom of the spring (12) is fixedly connected to a linkage component, which is connected to the valve plate (7).

2. The low-resistance forged steel check valve according to claim 1, characterized in that: The pressure measuring assembly includes a pressure sensor (15), and the mounting end of the pressure sensor (15) is fixedly embedded in the outer wall of one side of the valve plate (7). The detection end of the pressure sensor (15) is fixedly connected to a pressure measuring plate (14), and the pressure measuring plate (14) is sealed and slidably embedded in the outer wall of one side of the valve plate (7).

3. The low-resistance forged steel check valve according to claim 1, characterized in that: The screw-type pressure regulating assembly includes a screw body (11), and the screw body (11) is fixedly connected to the drive shaft of the motor (9), and extends through the bottom wall of the mounting groove (10) to the valve body (1). The screw body (11) is rotatably connected to the valve body (1). The outer surface of the screw body (11) is threaded with a movable plate (13), and the movable plate (13) is slidably connected to the inner wall of the valve body (1).

4. A low-resistance forged steel check valve according to claim 1, characterized in that: The linkage component includes a slide (4), which is fixedly installed at the bottom of the spring (12) and slidably connected to the inner wall of the valve body (1). Both outer walls of the slide (4) are rotatably connected to connecting rods (5), and the bottoms of the two connecting rods (5) are rotatably connected to a slider (6).

5. A low-resistance forged steel check valve according to claim 4, characterized in that: The slider (6) has a slide rail (16) slidably connected to one side of its outer surface, and the slide rail (16) is fixedly connected to the valve plate (7).

6. A low-resistance forged steel check valve according to claim 1, characterized in that: The top cover (2) and the valve body (1) are fixed together by multiple bolts.

7. A low-resistance forged steel check valve according to claim 1, characterized in that: The top of the top cover (2) is fixedly connected to a controller (3), and the controller (3) is electrically connected to the motor (9) and the pressure sensor (15).

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